378 results on '"Ramzi, A."'
Search Results
2. Participation in Tobacco Cessation Programs Among Medicaid Managed Care Enrollees in Florida.
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Mkuu, Rahma S., Glymph, Casey C., Lurk, Peyton A., McCraney, Madison R., LeLaurin, Jennifer H., Salloum, Ramzi G., Hall, Jaclyn M., and Cogle, Christopher R.
- Abstract
Background/Objectives: Tobacco use remains a significant public health issue, particularly among individuals with low incomes, including Medicaid recipients who often face multiple barriers to quitting. This study aimed to identify barriers, from the perspective of Medicaid managed care organizations (MCOs), influencing Medicaid recipient participation in tobacco cessation programs. Methods: Focus group interviews were conducted with Florida Medicaid MCOs to elicit processes for case identification, outreach, referral, program participation, and incentives. Answers were synthesized into themes. Results: Medicaid recipients were primarily identified through nicotine dependency claim codes or Health Risk Assessments (HRAs). Individuals were referred to state and local community tobacco cessation programs through text messaging and outreach by MCO case managers. The MCOs identified the following as barriers: primary care physicians (PCPs) with limited knowledge about cessation programs and pharmacologic treatments for nicotine dependence, low availability of health coaches, long wait times for entry into cessation programs, weak coordination between MCOs and cessation programs, and insufficient incentives for individuals for program participation. Suggested strategies to overcome barriers were continuing medical education (CME) for PCPs about tobacco cessation programs and prescription therapies, increasing the training of health coaches, more investment in quitlines, increasing data sharing between MCOs and cessation programs, and increasing incentives for individuals. Conclusions: These findings highlight the importance of engaging MCOs in discussions about policy and program improvements, as their insights can drive meaningful changes in how tobacco cessation and other preventive health programs are structured and implemented. Targeted interventions are needed to enhance tobacco cessation program participation among Medicaid recipients. [ABSTRACT FROM AUTHOR]
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- 2024
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3. Evaluating Biomarkers of Bone Health After an 8-Week Walking Program in Non-Ambulatory Stroke Survivors: A Pilot Study.
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Alajam, Ramzi A., Alqahtani, Abdulfattah S., Moon, Sanghee, Sarmento, Caio V. M., Smirnova, Irina V., Pang, Marco Y. C., and Liu, Wen
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BONE health , *EXERCISE physiology , *FITNESS walking , *STROKE patients , *OSTEOGENESIS imperfecta - Abstract
Background/Objectives: Stroke survivors have a significantly increased likelihood of developing osteoporosis, a condition characterized by weak and brittle bones as well as an elevated risk of bone fractures. However, previous studies on exercise intervention have mostly been on stroke survivors who are able to walk. The objective of this study was to examine the effect of walking exercise on bone health in non-ambulatory stroke survivors. Methods: This pre- and post-test study enrolled a group of chronic non-ambulatory stroke survivors. They were instructed to complete an 8-week aerobic walking exercise program, three sessions per week. Serum concentrations of osteocalcin (OC) and carboxy-terminal telopeptides of type I collagen (ICTP) were evaluated at baseline and after completing the walking exercise program. In addition, we assessed the ambulation capacity and balance control using the functional ambulation category (FAC) and Berg Balance Scale (BBS), respectively. Results: A total of 9 out of 10 non-ambulatory stroke survivors who were recruited completed the intervention. The serum concentration of OC significantly increased from 8.51 ± 2.28 ng/mL to 9.39 ± 2.97 ng/mL (p < 0.10). The serum concentration of ICTP significantly increased from 4.45 ± 2.58 ng/mL to 5.31 ± 2.92 ng/mL (p < 0.10). Both FAC and BBS scores significantly improved from 1.0 ± 0 to 1.33 ± 0.5 (p < 0.1) and from 7.22 ± 10.02 to 15.78 ± 14.81 (p < 0.01), respectively. Conclusions: The findings of this pilot study suggest that walking exercise may improve bone health by initiating a bone remodeling process in chronic non-ambulatory stroke survivors. [ABSTRACT FROM AUTHOR]
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- 2024
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4. A Note on a Min–Max Method for a Singular Kirchhoff Problem of Fractional Type.
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Alsaedi, Ramzi
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IMPLICIT functions , *EQUATIONS - Abstract
In the present work, we study a fractional elliptic Kirchhoff-type problem that has a singular term. More precisely, we start by proving some properties related to the energy functional associated with the studied problem. Then, we use the variational method combined with the min–max method to prove that the energy functional reaches its global minimum. Finally, since the energy functional has a singularity, we use the implicit function theorem to show that the point where the minimum is reached is a weak solution for the main problem. To illustrate our main result, we give an example at the end of this paper. [ABSTRACT FROM AUTHOR]
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- 2024
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5. Comparative Assessment of Multimodal Sensor Data Quality Collected Using Android and iOS Smartphones in Real-World Settings.
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Halabi, Ramzi, Selvarajan, Rahavi, Lin, Zixiong, Herd, Calvin, Li, Xueying, Kabrit, Jana, Tummalacherla, Meghasyam, Chaibub Neto, Elias, and Pratap, Abhishek
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MACHINE learning , *DIGITAL signal processing , *DIGITAL signatures , *DIGITAL health , *DATA quality - Abstract
Healthcare researchers are increasingly utilizing smartphone sensor data as a scalable and cost-effective approach to studying individualized health-related behaviors in real-world settings. However, to develop reliable and robust digital behavioral signatures that may help in the early prediction of the individualized disease trajectory and future prognosis, there is a critical need to quantify the potential variability that may be present in the underlying sensor data due to variations in the smartphone hardware and software used by large population. Using sensor data collected in real-world settings from 3000 participants' smartphones for up to 84 days, we compared differences in the completeness, correctness, and consistency of the three most common smartphone sensors—the accelerometer, gyroscope, and GPS— within and across Android and iOS devices. Our findings show considerable variation in sensor data quality within and across Android and iOS devices. Sensor data from iOS devices showed significantly lower levels of anomalous point density (APD) compared to Android across all sensors (p < 1 × 10−4). iOS devices showed a considerably lower missing data ratio (MDR) for the accelerometer compared to the GPS data (p < 1 × 10−4). Notably, the quality features derived from raw sensor data across devices alone could predict the device type (Android vs. iOS) with an up to 0.98 accuracy 95% CI [0.977, 0.982]. Such significant differences in sensor data quantity and quality gathered from iOS and Android platforms could lead to considerable variation in health-related inference derived from heterogenous consumer-owned smartphones. Our research highlights the importance of assessing, measuring, and adjusting for such critical differences in smartphone sensor-based assessments. Understanding the factors contributing to the variation in sensor data based on daily device usage will help develop reliable, standardized, inclusive, and practically applicable digital behavioral patterns that may be linked to health outcomes in real-world settings. [ABSTRACT FROM AUTHOR]
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- 2024
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6. Optimal Placement of HVDC-VSC in AC System Using Self-Adaptive Bonobo Optimizer to Solve Optimal Power Flows: A Case Study of the Algerian Electrical Network.
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Alouache, Houssam Eddine, Sayah, Samir, Bosisio, Alessandro, Hamouda, Abdellatif, Kouadri, Ramzi, and Shirvani, Rouzbeh
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HIGH-voltage direct current transmission ,ELECTRIC power ,HYBRID power systems ,ELECTRIC networks ,ELECTRICAL load - Abstract
Modern electrical power networks make extensive use of high voltage direct current transmission systems based on voltage source converters due to their advantages in terms of both cost and flexibility. Moreover, incorporating a direct current link adds more complexity to the optimal power flow computation. This paper presents a new meta-heuristic technique, named self-adaptive bonobo optimizer, which is an improved version of bonobo optimizer. It aims to solve the optimal power flow for alternating current power systems and hybrid systems AC/DC, to find the optimal location of the high voltage direct current line in the network, with a view to minimize the total generation costs and the total active power transmission losses. The self-adaptive bonobo optimizer was tested on the IEEE 30-bus system, and the large-scale Algerian 114-bus electric network. The obtained results were assessed and contrasted with those previously published in the literature in order to demonstrate the effectiveness and potential of the suggested strategy. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Integral Valorization of Posidonia oceanica Balls: An Abundant and Potential Biomass
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Ingeniería química y del medio ambiente, Ingeniaritza kimikoa eta ingurumenaren ingeniaritza, Mnafki, Rim, Morales, Amaia, Sillero, Leyre, Khiari, Ramzi, Moussaoui, Younes, Labidi, Jalel, Ingeniería química y del medio ambiente, Ingeniaritza kimikoa eta ingurumenaren ingeniaritza, Mnafki, Rim, Morales, Amaia, Sillero, Leyre, Khiari, Ramzi, Moussaoui, Younes, and Labidi, Jalel
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Posidonia oceanica balls (POB), a kind of seagrass, are a significant environmental issue since they are annually discharged onto beaches. Their current usefulness limits interest in their management and enhances the environmental problem. Therefore, in this research, the potential of this lignocellulosic biomass was studied from a holistic biorefinery point of view. To this end, an in-depth study was carried out to select the best pathway for the integral valorization of POBs. First, an autohydrolysis process was studied for the recovery of oligosaccharides. Then, a delignification stage was applied, where, in addition to studying different delignification methods, the influence of the autohydrolysis pre-treatment was also investigated. Finally, cellulose nanofibers (CNFs) were obtained through a chemo-mechanical treatment. The results showed that autohydrolysis not only improved the delignification process and its products, but also allowed the hemicelluloses to be valorized. Acetoformosolv delignification proved to be the most successful in terms of lignin and cellulose properties. However, alkaline delignification was able to extract the highest amount of lignin with low purity. CNFs were also successfully produced from bleached solids. Therefore, the potential of POB as a feedstock for a biorefinery was confirmed, and the pathway should be chosen according to the requirements of the desired end products.
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- 2024
8. Smartphone Assessment of the Sitting Heel-Rise Test.
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Hoffmann, Gustavo O., Borba, Edilson, Casarotto, Eduardo H., Devetak, Gisele Francine, Jaber, Ramzi, Buckley, John G., and Rodacki, André L. F.
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SMARTPHONES ,GYROSCOPES ,DATA analysis ,THIGH ,VIDEOS - Abstract
The study presents a new approach for assessing plantarflexor muscles' function using a smartphone. The test involves performing repeated heel raises for 60 s while seated. The seated heel-rise test offers a simple method for assessing plantarflexor muscles' function in those with severe balance impairment who are unable to complete tests performed while standing. The study aimed to showcase how gyroscopic data from a smartphone placed on the lower limb can be used to assess the test. Eight participants performed the seated heel-rise test with each limb. Gyroscope and 2D video analysis data (60 Hz) of limb motion were used to determine the number of cycles, the average rise (T-rise), lowering (T-lower), and cycle (T-total) times. The number of cycles detected matched exactly when the gyroscope and kinematic data were compared. There was good time domain agreement between gyroscopic and video data (T-rise = 0.0005 s, T-lower = 0.0013 s, and T-total = 0.0017 s). The 95% CI limits of agreement were small (T-total −0.1118, 0.1127 s, T-lower −0.1152, 0.1179 s, and T-total −0.0763, 0.0797 s). Results indicate that a smartphone placed on the thigh can successfully assess the seated heel-rise test. The seated heel-rise test offers an attractive alternative to test plantarflexor muscles' functionality in those unable to perform tests in standing positions. [ABSTRACT FROM AUTHOR]
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- 2024
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9. Statistical Optimization and Purification of Cellulase Enzyme Production from Trichosporon insectorum.
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Touijer, Hanane, Benchemsi, Najoua, Irfan, Muhammad, Tramice, Annabella, Slighoua, Meryem, Mothana, Ramzi A., Alanzi, Abdullah R., Dalila, Bousta, and Bekkari, Hicham
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DUNG beetles ,RESPONSE surfaces (Statistics) ,LIGNOCELLULOSE ,CELLULASE ,SUBSTRATES (Materials science) ,WASTE management - Abstract
Enzymatic degradation of cellulosic biomass represents the most sustainable and environmentally friendly method for producing liquid biofuel, widely utilized in various commercial processes. While cellulases are predominantly produced by bacteria and fungi, the enzymatic potential of cellulase-producing yeasts remains significantly less explored. In this study, the yeast strain Trichosporon insectorum, isolated from the gut of the coprophagous beetle Gymnopleurus sturmii, was utilized for cellulase production in submerged fermentation. A central composite design was employed to optimize cellulase production, with substrate concentration, temperature, and pH as dependent variables. The highest CMCase activity of 0.71 IU/mL was obtained at 1% substrate concentration, pH 5, and an incubation temperature of 40 °C for 72 h of fermentation using cellulose as a carbon source. For FPase production, the high value was 0.23 IU/mL at 0.5% CMC, pH 6, and an incubation temperature of 40 °C for 72 h. After purification, the enzymes produced by T. insectorum represent 39% of the total proteins. The results of this study offer an alternative strategy for utilizing various carbon sources, both soluble (CMC, carboxymethylcellulose) and insoluble (cellulose), to efficiently produce cellulase for the degradation of lignocellulosic materials. This approach holds promising benefits for sustainable waste management. [ABSTRACT FROM AUTHOR]
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- 2024
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10. Mechanical Assessment of CAD/CAM Fabricated Hybrid Ceramics: An In Vitro Study.
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Alanazi, Khalid K., Alzaid, Abdulaziz A., Elkaffas, Ali A., Bukhari, Sarah A., Althubaitiy, Ramzi O., Alfaifi, Khalid A., Alfahdi, Ibrahim M., and Alqahtani, Hussain A.
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VICKERS hardness ,FLEXURAL strength ,HARDNESS testing ,COMPRESSIVE strength ,FLEXURE - Abstract
The current study aimed to compare the mechanical properties of CAD/CAM fabricated hybrid ceramic restorative materials. The current study assessed the mechanical properties of additively and subtractively manufactured CAD/CAM fabricated hybrid ceramic by conducting flexure strength test, compressive strength test, and Vickers hardness test. Flexural samples were subjected to a three-point bending test using a universal testing machine until the samples showed fracture. Moreover, samples for the compressive strength test were subjected to compression tests using a universal testing machine until samples were fractured. Samples for the Vickers hardness was tested using the Vickers hardness testing machine to determine the sample's hardness values. There were significant differences (p = 0.0001) were observed among the additive and subtractive groups in terms of flexure strength and compressive strength test. Regarding the Vickers hardness test, significant differences (p = 0.0001) were observed between the polished and unpolished groups in additive manufacturing. However, no significant (p = 0.681) differences were observed in the subtractive manufacturing technique. The subtractive group achieved ISO specifications in terms of flexural strength and was superior to additive groups in hardness while exhibiting lower performance in compressive strength. Moreover, printing orientation had a significant influence on the performance of additive groups. Flexural strength and hardness were improved when the printing orientation was in alignment with the direction of load (90°) while compressive strength was improved when the printing orientation was perpendicular to the direction of load (0°). [ABSTRACT FROM AUTHOR]
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- 2024
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11. Eco-Sustainable Cement: Natural Volcanic Tuffs' Impact on Concrete Strength and Durability.
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Abutaqa, Ala, Mohsen, Mohamed O., Aburumman, Mervat O., Senouci, Ahmed, Taha, Ramzi, Maherzi, Walid, and Qtiashat, Deya
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CONCRETE durability ,SUSTAINABILITY ,SUSTAINABLE construction ,CEMENT industries ,SCANNING electron microscopy - Abstract
This study underscores the potential of utilizing natural volcanic tuffs (NVTs) as supplementary cementitious materials (SCMs) in alignment with global sustainability efforts aimed at mitigating the cement industry's negative impacts on both the economy and the environment. Experimental investigations were conducted on concrete mixtures containing 10%, 20%, 30%, 40%, and 50% NVT as partial cement replacements to assess their influence on concrete's mechanical and microstructural properties. Based on the findings, concrete samples with 10% NVT replacements exhibited increased flexural and compressive strengths of 35.6% and 5.6%, respectively, compared with ordinary concrete after 28 days. The depth of water penetration in the concrete samples was significantly reduced by the inclusion of NVT, with a maximum reduction of 56.5%. Microstructural analysis using scanning electron microscopy (SEM) revealed enhanced densification of the concrete microstructures, attributed to the high pozzolanic activity of NVT use in cement-based composites. Analysis of variance (ANOVA) revealed statistically significant relationships between NVT content and both the compressive and flexural strengths of the concrete samples. In conclusion, substituting 10% cement with NVT not only enhances the mechanical properties of concrete but also decreases the energy demand for cement production and reduces carbon dioxide (CO
2 ) emissions, thus contributing to more sustainable construction practices. [ABSTRACT FROM AUTHOR]- Published
- 2024
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12. Strongly Fluorescent Blue-Emitting La 2 O 3 : Bi 3+ Phosphor for Latent Fingerprint Detection.
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Douiri, Hanen, Abid, Marwa, Rzouga Haddada, Lamia, Brini, Layla, Toncelli, Alessandra, Essoukri Ben Amara, Najoua, and Maalej, Ramzi
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FORENSIC fingerprinting ,FOURIER transform infrared spectroscopy ,FIELD emission electron microscopy ,LANTHANUM oxide ,COMPACT discs - Abstract
Blue-emitting bismuth-doped lanthanum oxide (La
2 O3 : Bi3+ ) with various concentrations of Bi was synthesized using the sol–gel combustion method and used for visualization of latent fingerprints (LFPs). An X-ray diffraction (XRD) study revealed the hexagonal structure of the phosphors and total incorporation of the bismuth in the La2 O3 matrix. Field Emission Scanning Electron Microscopy (FE-SEM) and Fourier Transform Infrared Spectroscopy (FTIR) were used to study the morphology and the relative vibrations of the synthesized samples. Photoluminescence (PL) studies showed strong blue emission around 460 nm due to the3 P1 →1 S0 transition. Clear bright-blue fingerprint images were obtained with the powder dusting method on various surfaces like aluminum, compact discs, glass, wood and marble. A first evaluation of these images indicated a clear visualization of all three levels of details and a very high contrast ranging from 0.41 on marble to 0.90 on aluminum. As a further step, we used an algorithm for extracting fingerprint minutiae with which we succeeded in detecting all three levels of fingerprint details and even the most difficult ones, like open and closed pores. According to these analyses, La2 O3 : Bi phosphor is demonstrated to be an effective blue fluorescent powder for excellent visualization of latent fingerprints. [ABSTRACT FROM AUTHOR]- Published
- 2024
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13. An Investigation of the Photonic Application of TeO 2 -K 2 TeO 3 -Nb 2 O 5 -BaF 2 Glass Co-Doped with Er 2 O 3 /Ho 2 O 3 and Er 2 O 3 /Yb 2 O 3 at 1.54 μm Based on Its Thermal and Luminescence Properties.
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Boussetta, Ahlem, Al-Syadi, Aref M., Albargi, Hasan B., Damak, Kamel, Ersundu, Ali Erçin, Ersundu, Miray Çelikbilek, Ramadan, Essam, Alshehri, Ali M., Hussein, Khalid I., Maalej, Ramzi, and Yousef, El Sayed
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SOLID-state lasers ,OPTICAL susceptibility ,REFRACTIVE index ,RADIATIVE transitions ,BRANCHING ratios - Abstract
A glass composition using TeO
2 -K2 TeO3 -Nb2 O5 -BaF2 co-doped with Er2 O3 /Ho2 O3 and Er2 O3 /Yb2 O3 was successfully fabricated. Its thermal stability and physical parameters were studied, and luminescence spectroscopy of the fabricated glasses was conducted. The optical band gap, Eopt , decreased from 2.689 to 2.663 eV following the substitution of Ho2 O3 with Yb2 O3 . The values of the refractive index, third-order nonlinear optical susceptibility (χ(3) ), and nonlinear refractive index (n2 ) of the fabricated glasses were estimated. Furthermore, the Judd–Ofelt intensity parameters Ω t (t = 2 , 4 , 6) , radiative properties such as transition probabilities (Aed ), magnetic dipole-type transition probabilities (Amd ), branching ratios (β), and radiative lifetime (τ) of the fabricated glasses were evaluated. The emission cross-section and FWHM of the4 I13/2 →4 I15/2 transition around 1.54 μm of the glass were reported, and the emission intensity of the visible signal was studied under 980 nm laser excitation. The material might be a useful candidate for solid lasers and nonlinear amplifier devices, especially in the communications bands. [ABSTRACT FROM AUTHOR]- Published
- 2024
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14. Crystal Structural Characteristics and Electrical Properties of Novel Sol-Gel Synthesis of Ceramic Bi 0.75 Ba 0.25 (FeMn) 0.5 O 3.
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Tayari, Faouzia, Dhahri, Ramzi, Elkenany, Elkenany Brens, Teixeira, Sílvia Soreto, Graça, Manuel Pedro Fernandes, Al-Syadi, A. M., Essid, Manel, and Iben Nassar, Kais
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SOL-gel processes , *SOL-gel materials , *DIELECTRIC properties , *CERAMIC materials , *SCANNING electron microscopy - Abstract
In this investigation, our primary objective is to explore the structural, morphological, and electrical characteristics of Bi0.75Ba0.25(FeMn)0.5O3 ceramic material synthesized by the sol-gel method. The prepared sample underwent synthesis through the conventional sol-gel technique. Examination through X-ray diffraction (XRD) unveiled a well-defined rhombohedral structure within the R 3 ´ C space group. Moreover, to evaluate the purity and nano-grain morphology, we utilized energy dispersive spectroscopy (EDX) and scanning electron microscopy (SEM). Electrical assessments were carried out over a frequency span of 100 Hz to 1 MHz and temperatures ranging from 200 to 340 K. Employing the correlated barrier hopping (CBH) model, we analyzed the AC conductivity of our specimen. The activation energy, determined from both DC conductivity and impedance spectra, demonstrated close correspondence, suggesting that both conductivity and r laxation processes are influenced by similar factors. Notably, the dielectric properties hold significant importance, potentially rendering our sample suitable for electronic applications. Furthermore, we calculated thermodynamic parameters, such as enthalpy (ΔH), entropy change (ΔS), and free energy of activation (ΔF), offering deeper insights into the material's behavior and conductivity mechanisms. [ABSTRACT FROM AUTHOR]
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- 2024
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15. Formulation of a Three-Component Essential Oil Mixture from Lavandula dentata , Rosmarinus officinalis , and Myrtus communis for Improved Antioxidant Activity.
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Elbouzidi, Amine, Taibi, Mohamed, El Hachlafi, Naoufal, Haddou, Mounir, Jeddi, Mohamed, Baraich, Abdellah, Aouraghe, Aya, Bellaouchi, Reda, Mothana, Ramzi A., Hawwal, Mohammed F., Mesnard, François, Hano, Christophe, Asehraou, Abdeslam, Chaabane, Khalid, El Guerrouj, Bouchra, and Addi, Mohamed
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ESSENTIAL oils ,ROSEMARY ,RADICALS (Chemistry) ,FOOD preservation ,PHARMACEUTICAL industry ,GAS chromatography/Mass spectrometry (GC-MS) - Abstract
The optimization of existing natural antioxidants that are highly effective is crucial for advancements in medicine and the food industry. Due to growing concerns regarding the safety of synthetic antioxidants, researchers are increasingly focusing on natural sources, particularly essential oils (EOs). Combining EOs might enhance antioxidant activity due to increased chemical diversity. This study investigates, for the first time, the antioxidant properties of EOs from Lavandula dentata, Rosmarinus officinalis, and Myrtus communis, both individually and in combination, using the augmented-simplex design methodology. The in vitro evaluation of the antioxidant activity was performed using DPPH and ABTS radical scavenging assays. Chromatography gas-mass spectrometry (CG-MS) revealed that 1,8-cineol (37.27%) and pinocarveol (12.67%) are the primary components of L. dentata; verbenone (16.90%), camphor (15.00%), and camphene (11.03%) are predominant in R. officinalis; while cineol (43.32%) is the main component of M. communis. The EOs showed varying scavenging activities against ABTS and DPPH radicals, with DPPH assay values ranging from 194.10 ± 3.01 to 541.19 ± 3.72 µg/mL and ABTS assay values ranging from 134.07 ± 1.70 to 663.42 ± 2.99 µg/mL. These activities were enhanced when the EOs were combined. The optimal antioxidant blend for DPPH
IC50 consisted of 20% L. dentata, 50% R. officinalis, and 30% M. communis. For the highest ABTS radical scavenging activity, the best combination was 18% L. dentata, 43% R. officinalis, and 40% M. communis. These results highlight the potential of EO combinations as new natural formulations for use in cosmeceutical, food, and pharmaceutical sectors. [ABSTRACT FROM AUTHOR]- Published
- 2024
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16. Enhanced CPU Design for SDN Controller.
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Bazzi, Hiba S., Jaber, Ramzi A., El-Hajj, Ahmad M., Hija, Fathelalem A., and Haidar, Ali M.
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ASSOCIATIVE storage ,CENTRAL processing units ,MANY-valued logic ,LOGIC design ,FIELD-effect transistors ,TELECOMMUNICATION network management ,OPENFLOW (Computer network protocol) - Abstract
Software-Defined Networking (SDN) revolutionizes network management by decoupling control plane functionality from data plane devices, enabling the centralized control and programmability of network behavior. This paper uses the ternary system to improve the Central Processing Unit (CPU) inside the SDN controller to enhance network management. The Multiple-Valued Logic (MVL) circuit shows remarkable improvement compared to the binary circuit regarding the chip area, propagation delay, and energy consumption. Moreover, the Carbon Nanotube Field-Effect Transistor (CNTFET) shows improvement compared to other transistor technologies regarding energy efficiency and circuit speed. To the best of our knowledge, this is the first time that a ternary design has been applied inside the CPU of an SDN controller. Earlier studies focused on Ternary Content-Addressable Memory (TCAM) in SDN. This paper proposes a new 1-trit Ternary Full Adder (TFA) to decrease the propagation delay and the Power–Delay Product (PDP). The proposed design is compared to the latest 17 designs, including 15 designs that are 1-trit TFA CNTFET-based, 2-bit binary FA FinFET-based, and 2-bit binary FA CMOS-based, using the HSPICE simulator, to optimize the CPU utilization in SDN environments, thereby enhancing programmability. The results show the success of the proposed design in reducing the propagation delays by over 99% compared to the 2-bit binary FA CMOS-based design, over 78% compared to the 2-bit binary FA FinFET-based design, over 91% compared to the worst-case TFA, and over 49% compared to the best-case TFAs. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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17. Eye-Net: A Low-Complexity Distributed Denial of Service Attack-Detection System Based on Multilayer Perceptron.
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Khantouchi, Ramzi, Gasmi, Ibtissem, and Ferrag, Mohamed Amine
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DENIAL of service attacks ,FEATURE selection ,ERROR rates ,INTERNET of things ,ENERGY consumption - Abstract
Distributed Denial of Service (DDoS) attacks disrupt service availability, leading to significant financial setbacks for individuals and businesses. This paper introduces Eye-Net, a deep learning-based system optimized for DDoS attack detection that combines feature selection, balancing methods, Multilayer Perceptron (MLP), and quantization-aware training (QAT) techniques. An Analysis of Variance (ANOVA) algorithm is initially applied to the dataset to identify the most distinctive features. Subsequently, the Synthetic Minority Oversampling Technique (SMOTE) balances the dataset by augmenting samples for under-represented classes. Two distinct MLP models are developed: one for the binary classification of flow packets as regular or DDoS traffic and another for identifying six specific DDoS attack types. We store MLP model weights at 8-bit precision by incorporating the quantization-aware training technique. This adjustment slashes memory use by a factor of four and reduces computational cost similarly, making Eye-Net suitable for Internet of Things (IoT) devices. Both models are rigorously trained and assessed using the CICDDoS2019 dataset. Test results reveal that Eye-Net excels, surpassing contemporary DDoS detection techniques in accuracy, recall, precision, and F1 Score. The multiclass model achieves an impressive accuracy of 96.47% with an error rate of 8.78%, while the binary model showcases an outstanding 99.99% accuracy, maintaining a negligible error rate of 0.02%. [ABSTRACT FROM AUTHOR]
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- 2024
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18. Investigation of Thermal and Spectroscopic Properties of Tellurite-Based Glasses Doped with Rare-Earth Oxides for Infrared Solid-State Lasers.
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Boussetta, Ahlem, Al-Syadi, Aref M., Damak, Kamel, Ersundu, Ali Erçin, Çelikbilek Ersundu, Miray, Ramadan, Essam, Alshehri, Ali M., Hussein, Khalid I., Maalej, Ramzi, and Yousef, El Sayed
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SOLID-state lasers ,MID-infrared lasers ,INFRARED lasers ,QUALITY factor ,REFRACTIVE index - Abstract
The thermal and optical properties of 60TeO
2 -20K2 TeO3 -10WO3 -10Nb2 O5 (in mol%) glasses doped with Ho2 O3 , Er2 O3 , and Tm2 O3 were explored in the present work. The thermal stability, refractive index n, extinction coefficient k, absorption coefficient α, and optical band gap of the glasses were evaluated. The UV–Vis–NIR absorption spectra, the Judd–Ofelt intensity parameter, the spectroscopic quality factor, and the emission and absorption cross-sections were calculated to investigate the effects of Er3+ and Tm3+ , respectively, on the band spectroscopic properties of Ho3+ ions. The results showed that the maximum emission cross-section was approximately 8 × 10 − 21 c m 2 , and the values of the full width at half maximum ( F W H M) , quality factor ( σ e × F W H M) , and gain coefficient of Ho3+ :5 I7 →5 I8 were also reported. The value of the F W H M × σ e was 1200 × 10 − 28 c m 3 , which showed greater gain characteristics than earlier study results. For 2 μ m mid-infrared solid-state lasers, the glasses that were examined might be a good host material. [ABSTRACT FROM AUTHOR]- Published
- 2024
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19. Evaluation of the Interaction between Carvacrol and Thymol, Major Compounds of Ptychotis verticillata Essential Oil: Antioxidant, Anti-Inflammatory and Anticancer Activities against Breast Cancer Lines.
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Taibi, Mohamed, Elbouzidi, Amine, Haddou, Mounir, Baraich, Abdellah, Ou-Yahia, Douaae, Bellaouchi, Reda, Mothana, Ramzi A., Al-Yousef, Hanan M., Asehraou, Abdeslam, Addi, Mohamed, Guerrouj, Bouchra El, and Chaabane, Khalid
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BREAST cancer ,CYTOTOXINS ,VITAMIN C ,NATUROPATHY ,ANTI-inflammatory agents ,CARVACROL ,THYMOL - Abstract
The objective of this study was to evaluate the antioxidant, anti-inflammatory, and anticancer properties of thymol, carvacrol, and their equimolar mixture. Antioxidant activities were assessed using the DPPH, ABTS, and ORAC methods. The thymol/carvacrol mixture exhibited significant synergism, surpassing the individual compounds and ascorbic acid in DPPH (IC
50 = 43.82 ± 2.41 µg/mL) and ABTS (IC50 = 23.29 ± 0.71 µg/mL) assays. Anti-inflammatory activity was evaluated by inhibiting the 5-LOX, COX-1, and COX-2 enzymes. The equimolar mixture showed the strongest inhibition of 5-LOX (IC50 = 8.46 ± 0.92 µg/mL) and substantial inhibition of COX-1 (IC50 = 15.23 ± 2.34 µg/mL) and COX-2 (IC50 = 14.53 ± 2.42 µg/mL), indicating a synergistic effect. Anticancer activity was tested on MCF-7, MDA-MB-231, and MDA-MB-436 breast cancer cell lines using the MTT assay. The thymol/carvacrol mixture demonstrated superior cytotoxicity (IC50 = 0.92–1.70 µg/mL) and increased selectivity compared to cisplatin, with high selectivity indices (144.88–267.71). These results underscore the promising therapeutic potential of the thymol/carvacrol combination, particularly for its synergistic antioxidant, anti-inflammatory, and anticancer properties against breast cancer. This study paves the way for developing natural therapies against breast cancer and other conditions associated with oxidative stress and inflammation, leveraging the synergistic effects of natural compounds like thymol and carvacrol. [ABSTRACT FROM AUTHOR]- Published
- 2024
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20. Synthesis and In Silico Analysis of New Polyheterocyclic Molecules Derived from [1,4]-Benzoxazin-3-one and Their Inhibitory Effect against Pancreatic α-Amylase and Intestinal α-Glucosidase.
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Ellouz, Mohamed, Ihammi, Aziz, Baraich, Abdellah, Farihi, Ayoub, Addichi, Darifa, Loughmari, Saliha, Sebbar, Nada Kheira, Bouhrim, Mohamed, Mothana, Ramzi A., Noman, Omar M., Eto, Bruno, Chigr, Fatiha, and Chigr, Mohammed
- Abstract
This study focuses on synthesizing a new series of isoxazolinyl-1,2,3-triazolyl-[1,4]-benzoxazin3-one derivatives 5a–5o. The synthesis method involves a double 1,3-dipolar cycloaddition reaction following a “click chemistry” approach, starting from the respective [1,4]-benzoxazin-3-ones. Additionally, the study aims to evaluate the antidiabetic potential of these newly synthesized compounds through in silico methods. This synthesis approach allows for the combination of three heterocyclic components: [1,4]-benzoxazin-3-one, 1,2,3-triazole, and isoxazoline, known for their diverse biological activities. The synthesis procedure involved a two-step process. Firstly, a 1,3-dipolar cycloaddition reaction was performed involving the propargylic moiety linked to the [1,4]-benzoxazin-3-one and the allylic azide. Secondly, a second cycloaddition reaction was conducted using the product from the first step, containing the allylic part and an oxime. The synthesized compounds were thoroughly characterized using spectroscopic methods, including 1H NMR, 13C NMR, DEPT-135, and IR. This molecular docking method revealed a promising antidiabetic potential of the synthesized compounds, particularly against two key diabetes-related enzymes: pancreatic α-amylase, with the two synthetic molecules 5a and 5o showing the highest affinity values of 9.2 and 9.1 kcal/mol, respectively, and intestinal α-glucosidase, with the two synthetic molecules 5n and 5e showing the highest affinity values of −9.9 and −9.6 kcal/mol, respectively. Indeed, the synthesized compounds have shown significant potential as antidiabetic agents, as indicated by molecular docking studies against the enzymes α-amylase and α-glucosidase. Additionally, ADME analyses have revealed that all the synthetic compounds examined in our study demonstrate high intestinal absorption, meet Lipinski’s criteria, and fall within the required range for oral bioavailability, indicating their potential suitability for oral drug development. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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21. Enhancement in Heat Transfer Performance of Water Vapor Condensation on Graphene-Coated Copper Surfaces: A Molecular Dynamics Study.
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Nurrohman, Nurrohman, Almisbahi, Hind, Tocci, Elena, Abulkhair, Hani, Albeirutty, Mohammed, Othman, Ramzi, and Bamaga, Omar
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WATER vapor ,COPPER surfaces ,SURFACE dynamics ,WATER transfer ,HEAT transfer ,COPPER ,MOLECULAR dynamics - Abstract
The condensation of water vapor plays a crucial role in various applications, including combating water scarcity. In this study, by employing molecular dynamics simulations, we delved into the impact of graphene coatings on water vapor condensation on copper surfaces. Unique to this work was the exploration of various levels of graphene coverage and distribution, a facet largely unexplored in prior investigations. The findings demonstrated a notable increase in the rate of water vapor condensation and heat transfer performance as the graphene coverage was reduced. Using graphene coverages of 84%, 68%, and 52%, the numbers of condensed water molecules were 664, 735, and 880 molecules/ns, respectively. One of the most important findings was that when using the same graphene coverage of 68%, the rate of water vapor condensation and heat transfer performance increased as the graphene coating became more distributed. The overall performance of the water condensation correlated well with the energy and vibrational interaction between the graphene and the copper. This phenomenon suggests how a hybrid surface can enhance the nucleation and growth of a droplet, which might be beneficial for tailoring graphene-coated copper surfaces for applications demanding efficient water vapor condensation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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22. Physicochemical Characterization of Moroccan Honey Varieties from the Fez-Meknes Region and Their Antioxidant and Antibacterial Properties.
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Ailli, Atika, Zibouh, Khalid, Eddamsyry, Brahim, Drioiche, Aziz, Fetjah, Dounia, Ayyad, Fatima Zahra, Mothana, Ramzi A., Hawwal, Mohammed F., Radi, Mohamed, Tarik, Redouane, Elomri, Abdelhakim, Mouradi, Aicha, and Zair, Touriya
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HONEY ,SKIN care products ,OXIDANT status ,FLAVONOIDS ,HYDROXYMETHYLFURFURAL ,ANTIBACTERIAL agents - Abstract
Honey, with its varied and extensive characteristics, is a complex and diverse biological substance that has been used since ancient times. The aim of this study is to thoroughly characterize the physicochemical, phytochemical, and biological properties of four floral honey varieties from the Fez-Meknes region in Morocco, with the goal of promoting the valorization of Moroccan honey in skincare and cosmetic products. The analyses of their physicochemical characteristics encompass various parameters such as pH, acidity, density, water content, Brix index, conductivity, ash content, hydroxymethylfurfural (HMF) content, and color. The levels of polyphenols range from 22.1 ± 0.4 to 69.3 ± 0.17 mg GAE/100 g of honey, measured using the Folin–Ciocalteu method for polyphenol quantification. Additionally, the estimation of flavonoid quantities in 100 g of honey, conducted using the aluminum trichloride method, reveals values ranging from 3.6 ± 0.2 to 7.2 ± 0.6 mg QE. Furthermore, it is noteworthy that honey exhibits high levels of glucose and relatively low concentrations of proteins. The quantitative evaluation of antioxidant effects, carried out through the 2,2-diphenyl-1-picrylhydrazyl free-radical-scavenging method and the ferric-reducing antioxidant power (FRAP) method, highlights the strong antioxidant capacity of multifloral honey, characterized by low inhibitory concentration values (IC
50 = 30.43 mg/mL and EC50 = 16.06 mg/mL). Moreover, all honey varieties demonstrate antibacterial and antifungal properties, with multifloral honey standing out for its particularly pronounced antimicrobial activity. The correlation analyses between phytochemical composition and antioxidant and antibacterial activities reveal an inverse relationship between polyphenols and IC50 (DPPH) and EC50 (FRAP) concentrations of honey. The correlation coefficients are established at R2 = −0.97 and R2 = −0.99, respectively. Additionally, a significant negative correlation is observed between polyphenols, flavonoids, and antifungal power (R2 = −0.95 and R2 = −0.96). In parallel, a marked positive correlation is highlighted between antifungal efficacy, DPPH antioxidant activity (R2 = 0.95), and FRAP (R2 = 0.92). These results underscore the crucial importance of phytochemical components in the beneficial properties of honey, meeting international quality standards. Consequently, honey could serve as a natural alternative to synthetic additives. [ABSTRACT FROM AUTHOR]- Published
- 2024
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23. From the Microbiome to the Electrome: Implications for the Microbiota–Gut–Brain Axis.
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Bourqqia-Ramzi, Marwane, Mansilla-Guardiola, Jesús, Muñoz-Rodriguez, David, Quarta, Elisa, Lombardo-Hernandez, Juan, Murciano-Cespedosa, Antonio, Conejero-Meca, Francisco José, Mateos González, Álvaro, Geuna, Stefano, Garcia-Esteban, María Teresa, and Herrera-Rincon, Celia
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- *
ESCHERICHIA coli , *BACTERIAL growth , *GRAM-negative bacteria , *FLUORESCENT probes , *GUT microbiome - Abstract
The gut microbiome plays a fundamental role in metabolism, as well as the immune and nervous systems. Microbial imbalance (dysbiosis) can contribute to subsequent physical and mental pathologies. As such, interest has been growing in the microbiota–gut–brain brain axis and the bioelectrical communication that could exist between bacterial and nervous cells. The aim of this study was to investigate the bioelectrical profile (electrome) of two bacterial species characteristic of the gut microbiome: a Proteobacteria Gram-negative bacillus Escherichia coli (E. coli), and a Firmicutes Gram-positive coccus Enterococcus faecalis (E. faecalis). We analyzed both bacterial strains to (i) validate the fluorescent probe bis-(1,3-dibutylbarbituric acid) trimethine oxonol, DiBAC4(3), as a reliable reporter of the changes in membrane potential (Vmem) for both bacteria; (ii) assess the evolution of the bioelectric profile throughout the growth of both strains; (iii) investigate the effects of two neural-type stimuli on Vmem changes: the excitatory neurotransmitter glutamate (Glu) and the inhibitory neurotransmitter γ-aminobutyric acid (GABA); (iv) examine the impact of the bioelectrical changes induced by neurotransmitters on bacterial growth, viability, and cultivability using absorbance, live/dead fluorescent probes, and viable counts, respectively. Our findings reveal distinct bioelectrical profiles characteristic of each bacterial species and growth phase. Importantly, neural-type stimuli induce Vmem changes without affecting bacterial growth, viability, or cultivability, suggesting a specific bioelectrical response in bacterial cells to neurotransmitter cues. These results contribute to understanding the bacterial response to external stimuli, with potential implications for modulating bacterial bioelectricity as a novel therapeutic target. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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24. The Value of Ischemic Cardiac Biomarkers to Predict Spontaneous Breathing Trial or Extubation Failure: A Systematic Review.
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Groenland, Carline N. L., Blijleven, Maud A., Ramzi, Imane, Dubois, Eric A., Heunks, Leo, Endeman, Henrik, Wils, Evert-Jan, and Baggen, Vivan J. M.
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EXTUBATION ,BIOMARKERS ,RESPIRATION ,ARTIFICIAL respiration ,VENTILATOR weaning - Abstract
Background: It is unclear whether other cardiac biomarkers than NT-proBNP can be useful in the risk stratification of patients weaning from mechanical ventilation. The aim of this study is to summarize the role of ischemic cardiac biomarkers in predicting spontaneous breathing trial (SBT) or extubation failure. Methods: We systematically searched Embase, MEDLINE, Web of Science, and Cochrane Central for studies published before January 2024 that reported the association between ischemic cardiac biomarkers and SBT or extubation failure. Data were extracted using a standardized form and methodological assessment was performed using the QUIPS tool. Results: Seven observational studies investigating four ischemic cardiac biomarkers (Troponin-T, Troponin-I, CK-MB, Myoglobin) were included. One study reported a higher peak Troponin-I in patients with extubation failure compared to extubation success (50 ng/L [IQR, 20–215] versus 30 ng/L [IQR, 10–86], p = 0.01). A second study found that Troponin-I measured before the SBT was higher in patients with SBT failure in comparison to patients with SBT success (100 ± 80 ng/L versus 70 ± 130 ng/L, p = 0.03). A third study reported a higher CK-MB measured at the end of the SBT in patients with weaning failure (SBT or extubation failure) in comparison to weaning success (8.77 ± 20.5 ng/mL versus 1.52 ± 1.42 ng/mL, p = 0.047). Troponin-T and Myoglobin as well as Troponin-I and CK-MB measured at other time points were not found to be related to SBT or extubation failure. However, most studies were underpowered and with high risk of bias. Conclusions: The association with SBT or extubation failure is limited for Troponin-I and CK-MB and appears absent for Troponin-T and Myoglobin, but available studies are hampered by significant methodological drawbacks. To more definitively determine the role of ischemic cardiac biomarkers, future studies should prioritize larger sample sizes, including patients at risk of cardiac disease, using stringent SBTs and structured timing of laboratory measurements before and after SBT. [ABSTRACT FROM AUTHOR]
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- 2024
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25. Enhancing Beamforming Efficiency Utilizing Taguchi Optimization and Neural Network Acceleration.
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Kheder, Ramzi, Ghayoula, Ridha, Smida, Amor, El Gmati, Issam, Latrach, Lassad, Amara, Wided, Hammami, Amor, Fattahi, Jaouhar, and Waly, Mohamed I.
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ARTIFICIAL neural networks ,ANTENNA arrays ,ANTENNA radiation patterns ,TAGUCHI methods ,BEAMFORMING - Abstract
This article presents an innovative method for efficiently synthesizing radiation patterns by combining the Taguchi method and neural networks, validating the results on a ten-element antenna array. The Taguchi method aims to minimize product and process variability, while neural networks are used to model the relationship between antenna design parameters and radiation pattern characteristics. This approach utilizes Taguchi parameters as inputs for the neural network, which is then trained on a dataset generated by the Taguchi method. After training, the network is validated using a real ten-element antenna array. Analytical results demonstrate that this method enables efficient synthesis of radiation patterns, with a significant reduction in computation time compared to traditional approaches. Furthermore, validation on the antenna array confirms the accuracy and robustness of the approach, showing a high correlation between the performance predicted by the neural network model and actual measurements on the antenna array. In summary, our article highlights that the combined use of the Taguchi method and neural networks, with validation on a real antenna array, offers a promising approach for efficient synthesis of antenna radiation patterns. This approach combines speed, accuracy, and reliability in antenna system design. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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26. Existence Results Related to a Singular Fractional Double-Phase Problem in the Whole Space.
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Alsaedi, Ramzi
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THRESHOLD energy , *SOBOLEV spaces - Abstract
In this paper, we will study a singular problem involving the fractional (q 1 (x ,.) - q 2 (x ,.)) -Laplacian operator in the whole space R N , (N ≥ 2) . More precisely, we combine the variational method with monotonicity arguments to prove that the associated functional energy admits a critical point, which is a weak solution for such a problem. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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27. Drought Monitoring Using Moderate Resolution Imaging Spectroradiometer-Derived NDVI Anomalies in Northern Algeria from 2011 to 2022.
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Benhizia, Ramzi, Phinzi, Kwanele, Hateffard, Fatemeh, Aib, Haithem, and Szabó, György
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DROUGHT management ,DROUGHTS ,MODIS (Spectroradiometer) ,NORMALIZED difference vegetation index ,WATER shortages ,RAINFALL ,WATER security - Abstract
Drought has emerged as a major challenge to global food and water security, and is particularly pronounced for Algeria, which frequently grapples with water shortages. This paper sought to monitor and assess the temporal and spatial distribution of drought severity across northern Algeria (excluding the Sahara) during the growing season from 2011 to 2022, while exploring the relationship between the normalized difference vegetation index (NDVI) anomaly and climate variables (rainfall and temperature). Temporal NDVI data from the Terra moderate resolution imaging spectroradiometer (MODIS) satellite covering the period 2000–2022 and climate data from the European Reanalysis 5th Generation (ERA5) datasets collected during the period 1990–2022 were used. The results showed that a considerable portion of northern Algeria has suffered from droughts of varying degrees of severity during the study period. The years 2022, 2021, 2016, and 2018 were the hardest hit, with 76%, 71%, 66%, and 60% of the area, respectively, experiencing drought conditions. While the relationship between the NDVI anomaly and the climatic factors showed variability across the different years, the steady decrease in vegetation health indicated by the NDVI anomaly corroborates the observed increase in drought intensity during the study period. We conclude that the MODIS-NDVI product offers a cost-efficient approach to monitor drought in data-scarce regions like Algeria, presenting a viable alternative to conventional climate-based drought indices, while serving as an initial step towards formulating drought mitigation plans. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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28. A Longitudinal Analysis of Mortality Related to Chronic Viral Hepatitis and Hepatocellular Carcinoma in the United States.
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Ozturk, N. Begum, Pham, Hoang Nhat, Mouhaffel, Rama, Ibrahim, Ramzi, Alsaqa, Marwan, Gurakar, Ahmet, and Saberi, Behnam
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CHRONIC active hepatitis ,HEPATOCELLULAR carcinoma ,VIRAL hepatitis ,MORTALITY ,CANCER-related mortality ,SOCIAL classes - Abstract
(1) Background: Hepatocellular carcinoma (HCC) contributes to the significant burden of cancer mortality in the United States (US). Despite highly efficacious antivirals, chronic viral hepatitis (CVH) remains an important cause of HCC. With advancements in therapeutic modalities, along with the aging of the population, we aimed to assess the contribution of CVH in HCC-related mortality in the US between 1999–2020. (2) Methods: We queried all deaths related to CVH and HCC in the multiple-causes-of-death files from the CDC Wide-ranging Online Data for Epidemiologic Research (WONDER) database between 1999–2020. Using the direct method of standardization, we adjusted all mortality information for age and compared the age-adjusted mortality rates (AAMRs) across demographic populations and by percentile rankings of social vulnerability. Temporal shifts in mortality were quantified using log-linear regression models. (3) Results: A total of 35,030 deaths were identified between 1999–2020. The overall crude mortality increased from 0.27 in 1999 to 8.32 in 2016, followed by a slight reduction to 7.04 in 2020. The cumulative AAMR during the study period was 4.43 (95% CI, 4.39–4.48). Males (AAMR 7.70) had higher mortality rates compared to females (AAMR 1.44). Mortality was higher among Hispanic populations (AAMR 6.72) compared to non-Hispanic populations (AAMR 4.18). Higher mortality was observed in US counties categorized as the most socially vulnerable (AAMR 5.20) compared to counties that are the least socially vulnerable (AAMR 2.53), with social vulnerability accounting for 2.67 excess deaths per 1,000,000 person-years. (4) Conclusions: Our epidemiological analysis revealed an overall increase in CVH-related HCC mortality between 1999–2008, followed by a stagnation period until 2020. CVH-related HCC mortality disproportionately affected males, Hispanic populations, and Black/African American populations, Western US regions, and socially vulnerable counties. These insights can help aid in the development of strategies to target vulnerable patients, focus on preventive efforts, and allocate resources to decrease HCC-related mortality. [ABSTRACT FROM AUTHOR]
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- 2024
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29. Identifying Predictors of Neck Disability in Patients with Cervical Pain Using Machine Learning Algorithms: A Cross-Sectional Correlational Study.
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Torad, Ahmed A., Ahmed, Mohamed M., Elabd, Omar M., El-Shamy, Fayiz F., Alajam, Ramzi A., Amin, Wafaa Mahmoud, Alfaifi, Bsmah H., and Elabd, Aliaa M.
- Subjects
NECK pain ,MACHINE learning ,PEOPLE with disabilities ,NECK ,CROSS-sectional method ,CERVICAL vertebrae ,DISABILITIES - Abstract
(1) Background: Neck pain intensity, psychosocial factors, and physical function have been identified as potential predictors of neck disability. Machine learning algorithms have shown promise in classifying patients based on their neck disability status. So, the current study was conducted to identify predictors of neck disability in patients with neck pain based on clinical findings using machine learning algorithms. (2) Methods: Ninety participants with chronic neck pain took part in the study. Demographic characteristics in addition to neck pain intensity, the neck disability index, cervical spine contour, and surface electromyographic characteristics of the axioscapular muscles were measured. Participants were categorised into high disability and low disability groups based on the median value (22.2) of their neck disability index scores. Several regression and classification machine learning models were trained and assessed using a 10-fold cross-validation method; also, MANCOVA was used to compare between the two groups. (3) Results: The multilayer perceptron (MLP) revealed the highest adjusted R2 of 0.768, while linear discriminate analysis showed the highest receiver characteristic operator (ROC) area under the curve of 0.91. Pain intensity was the most important feature in both models with the highest effect size of 0.568 with p < 0.001. (4) Conclusions: The study findings provide valuable insights into pain as the most important predictor of neck disability in patients with cervical pain. Tailoring interventions based on pain can improve patient outcomes and potentially prevent or reduce neck disability. [ABSTRACT FROM AUTHOR]
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- 2024
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30. Potential of Y 2 Sn 2 O 7 :Eu 3+ , Dy 3+ Inorganic Nanophosphors in Latent Fingermark Detection.
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Brini, Layla, Douiri, Hanen, Abid, Marwa, Toncelli, Alessandra, Qasymeh, Montasir, Maalej, Ramzi, and Abdelhedi, Mohamed
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HUMAN fingerprints ,FORENSIC fingerprinting ,TIN ,RIETVELD refinement ,CRYSTAL structure ,TERBIUM ,RARE earth metals - Abstract
In this work, we investigated the potential of Eu
3+ /Dy3+ -codoped Y2 Sn2 O7 fluorescent nanophosphors to visualize latent fingermarks. We prepared these nanophosphors with various doping concentrations by the conventional coprecipitation reaction. The crystal structure, morphology, luminescence properties, and energy transfer mechanisms were studied. The crystalline phase was characterized by X-ray diffraction and crystal structure refinement using the Rietveld method. XRD measurements showed that the samples crystallized in the pure single pyrochlore phase with few more peaks originated from secondary phases and impurities generated during phosphor production, and that Eu3+ ions occupied D3d symmetry sites. The average crystallite size after mechanical grinding was less than 100 nm for all compositions. The optical characterization showed that, when excited under 532 nm, the Eu3+ /Dy3+ -codoped Y2 Sn2 O7 samples' main intense emission peaks were located at 580–707 nm, corresponding to the5 D0 →7 Fj (j = l, 2, 3, and 4) transitions of europium. In fact, the5 D0 →7 F2 hypersensitive transition is strongly dependent on the local environment and was quite weak in Eu3+ :Y2 Sn2 O7 at low Eu3+ doping levels. We found that the presence of Dy3+ as a codopant permitted enhancing the emission from this transition. The calculated PL CIE coordinates for the synthesized nanophosphors were very close to those of the reddish-orange region and only slightly dependent on the doping level. Various surfaces, including difficult ones (wood and ceramic), were successfully tested for latent fingerprint development with the prepared Eu3+ /Dy3+ -codoped Y2 Sn2 O7 fluorescent nanophosphor powder. Thanks to the high contrast obtained, fingerprint ridge patterns at all three levels were highlighted: core (level 1) islands, bifurcation, and enclosure (level 2), and even sweat pores (level 3). [ABSTRACT FROM AUTHOR]- Published
- 2024
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31. Clinical Peri-Implant Parameters and Marginal Bone Loss for Early Mandibular Implant Overdentures: A Follow-Up of 60 Months.
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AlHelal, Abdulaziz A., Alzaid, Abdulaziz A., Almujel, Saad H., Alsaloum, Mohammed, Alanazi, Khalid K., Althubaitiy, Ramzi O., and Al-Aali, Khulud A.
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OVERLAY dentures ,OCCLUSAL adjustment ,DENTAL implants ,PERIODONTAL pockets ,DENTURES - Abstract
Background and Objectives: Despite the identified benefits of early implant loading, studies have questioned its advantages compared to delayed loading in edentulous patients. This study aimed to evaluate clinical peri-implant parameters and marginal bone loss around early placed and loaded mandibular implant overdentures with a 60-month follow-up. Materials and Methods: In this prospective cohort study, 43 patients were enrolled to receive 86 early loading sub-crestal dental implants through prosthetic guides. Implant overdentures were supported by two isolated implant locator attachments between two mental foramens. Clinical peri-implant parameters, including plaque index (PI), bleeding index (BI), peri-implant pocket depth (PIPD), and marginal bone loss (MBL) were evaluated using standardized techniques at 1, 12, 24, 36, 48, and 60 months follow-up. At 60 months, complications associated with implant overdentures (IOD's) were noted. The mean comparison of peri-implant clinical parameters was performed through ANOVA test. A p-value of ≤0.05 was taken as significant. Results: Out of the total 43 enrolled patients, 8 patients were lost during follow-up; as a result, 35 patients completed the 5 years follow-up. The mean values of PI, BI, and PIPD increased with no statistical difference (p > 0.05). For marginal bone loss, an increase in the mean values was noted at different time intervals with statistical differences (p < 0.001). The most common complications noted were loosening of the abutment, occlusal adjustment, retentive locator loosening and replacement, and relining of the denture. Conclusions: Early placement of IODs failed to prevent bone loss over time and was associated with complications, predominantly consisting of abutment loosening, occlusal adjustments, broken retentive locator components, relining, and rebasing. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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32. Timing of Surgery and Social Determinants of Health Related to Pathologic Complete Response after Total Neoadjuvant Therapy for Rectal Adenocarcinoma: Retrospective Study of National Cancer Database.
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Mai, Megan, Goldman, Jodi, Appiah, Duke, Abdulrahman, Ramzi, Kidwell, John, and Shi, Zheng
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PATHOLOGIC complete response ,NEOADJUVANT chemotherapy ,SOCIAL determinants of health ,DATABASES ,INDUCTION chemotherapy - Abstract
Total neoadjuvant therapy (TNT) for rectal adenocarcinoma (RAC) involves multi-agent chemotherapy and radiation before definitive surgery. Previous studies of the rest period (time between radiation and surgery) and pathologic complete response (pCR) have produced mixed results. The objective of this study was to evaluate the relationship between the rest period and pCR. This study utilized the National Cancer Database (NCDB) to retrospectively analyze 5997 stage-appropriate RAC cases treated with TNT from 2016 to 2020. The overall pCR rate was 18.6%, with most patients undergoing induction chemotherapy followed by long-course chemoradiation (81.5%). Multivariable logistic regression models revealed a significant non-linear relationship between the rest period and pCR (p = 0.033), with optimal odds at 14.7–15.9 weeks post radiation (odds ratio: 1.49, 95% confidence interval: 1.13–1.98) when compared to 4.0 weeks. Medicaid, distance to the treatment facility, and community education were associated with decreased odds of pCR. Findings highlight the importance of a 15–16-week post-radiation surgery window for achieving pCR in RAC treated with TNT and socioeconomic factors influencing pCR rates. Findings also emphasize the need for clinical trials to incorporate detailed analyses of the rest period and social determinant of health to better guide clinical practice. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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33. Effect of Matricaria aurea Essential Oils on Biofilm Development, Virulence Factors and Quorum Sensing-Dependent Genes of Pseudomonas aeruginosa.
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Qaralleh, Haitham, Saghir, Sultan Ayesh Mohammed, Al-limoun, Muhamad O., Dmor, Saif M., Khleifat, Khaled, Al-Ahmad, Basma Ezzat Mustafa, Al-Omari, Laila, Tabana, Yasser, Mothana, Ramzi A., Al-Yousef, Hanan M., and Alqahtani, Abdulaziz M.
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PSEUDOMONAS aeruginosa ,MICROCYSTIS aeruginosa ,ESSENTIAL oils ,RHAMNOLIPIDS ,BIOFILMS ,GAS chromatography/Mass spectrometry (GC-MS) ,QUORUM sensing - Abstract
The emergence of drug-resistant microorganisms presents a substantial global public health threat. The increase in pathogens resistant to commonly prescribed antibiotics underscores the urgent requirement to explore alternative treatment strategies. This study adopts a novel approach by harnessing natural resources, specifically essential oils (EO), to combat bacterial pathogenicity. The primary aim of this research was to analyze the chemical composition of the aerial part of the Matricaria aurea (M. aureas) EO and evaluate its potential for inhibiting quorum sensing (QS) and disrupting biofilm formation in Pseudomonas aeruginosa (P. aeruginosa). The gas chromatography-mass spectrometry (GCMS) analysis unveiled that α-bisabolol oxide A constituted the predominant portion, comprising 64.8% of the total, with β-bisabolene at 6.3% and α-farnesene at 4.8% following closely behind. The antibiofilm efficacy was observed at concentrations of 0.3, 0.15, and 0.08 mg/mL, demonstrating negligible effects on cell viability. Furthermore, the EO from M. aurea effectively inhibited the formation of P. aeruginosa biofilms by diminishing aggregation, hydrophobicity, and swarming motility. Significantly, the EO treatment resulted in a conspicuous decrease in the production of pyocyanin, rhamnolipid, and extracellular polymeric substances (EPS), along with a reduction in the enzymatic activity of protease and chitinase. The EO effectively hindered QS by disrupting QS mechanisms, resulting in a marked decline in the secretion of N-Acyl homoserine lactone (AHL) molecules and the expression of phazA1 and aprA genes. This investigation offers compelling evidence supporting the potential of M. aurea EO as a promising therapeutic candidate for addressing infectious diseases induced by biofilm formation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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34. Course Crafting in the Pandemic: Examination of Students' Positive Experiences.
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Narayanan, Lakshmi, Nasser, Ramzi, Menon, Shanker, and Wallace, Brett
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COVID-19 pandemic ,PSYCHOLOGY of students ,EMPATHY ,LEARNING ,PANDEMICS ,ONLINE education ,DISTANCE education - Abstract
College students' positive experiences were examined before and during COVID-19 when courses transitioned to a new format. During COVID-19, university courses at a state university in the US transitioned to a new online format. This study observed the affective experiences of students through the instructors' course crafting during times of crisis. The method of critical incident qualitative data collection examined what students perceived as positive experiences. Students' perceptions were examined, and the nature and types of positive experiences were examined before and during the pandemic. This comparison provided insights into the emotions and feelings experienced between the two groups (Before COVID-19 and During COVID-19). As courses were modified and redesigned for remote learning, examination of the findings showed students' positive experiences considering the faculty recrafting their courses, which gave a valuable insight into the dynamics of these positive experiences in the teaching and learning process. Educators crafted their courses' changing format and provided emotional support, empathy, kindness, reassurance, and encouragement when needed. The implications of these findings and understanding how we can thrive and flourish even in very challenging times in the virtual environment is discussed. [ABSTRACT FROM AUTHOR]
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- 2024
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35. Integral Valorization of Posidonia oceanica Balls: An Abundant and Potential Biomass.
- Author
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Mnafki, Rim, Morales, Amaia, Sillero, Leyre, Khiari, Ramzi, Moussaoui, Younes, and Labidi, Jalel
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POSIDONIA oceanica ,POSIDONIA ,LIGNOCELLULOSE ,DELIGNIFICATION ,BIOMASS ,OLIGOSACCHARIDES - Abstract
Posidonia oceanica balls (POB), a kind of seagrass, are a significant environmental issue since they are annually discharged onto beaches. Their current usefulness limits interest in their management and enhances the environmental problem. Therefore, in this research, the potential of this lignocellulosic biomass was studied from a holistic biorefinery point of view. To this end, an in-depth study was carried out to select the best pathway for the integral valorization of POBs. First, an autohydrolysis process was studied for the recovery of oligosaccharides. Then, a delignification stage was applied, where, in addition to studying different delignification methods, the influence of the autohydrolysis pre-treatment was also investigated. Finally, cellulose nanofibers (CNFs) were obtained through a chemo-mechanical treatment. The results showed that autohydrolysis not only improved the delignification process and its products, but also allowed the hemicelluloses to be valorized. Acetoformosolv delignification proved to be the most successful in terms of lignin and cellulose properties. However, alkaline delignification was able to extract the highest amount of lignin with low purity. CNFs were also successfully produced from bleached solids. Therefore, the potential of POB as a feedstock for a biorefinery was confirmed, and the pathway should be chosen according to the requirements of the desired end products. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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36. Integrated Analysis of lncRNA–miRNA–mRNA Regulatory Network in Rapamycin-Induced Cardioprotection against Ischemia/Reperfusion Injury in Diabetic Rabbits.
- Author
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Samidurai, Arun, Olex, Amy L., Ockaili, Ramzi, Kraskauskas, Donatas, Roh, Sean K., Kukreja, Rakesh C., and Das, Anindita
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LINCRNA ,REPERFUSION injury ,ISCHEMIA ,RABBITS ,MYOCARDIAL ischemia - Abstract
The inhibition of mammalian target of rapamycin (mTOR) with rapamycin (RAPA) provides protection against myocardial ischemia/reperfusion (I/R) injury in diabetes. Since interactions between transcripts, including long non-coding RNA (lncRNA), microRNA(miRNA) and mRNA, regulate the pathophysiology of disease, we performed unbiased miRarray profiling in the heart of diabetic rabbits following I/R injury with/without RAPA treatment to identify differentially expressed (DE) miRNAs and their predicted targets of lncRNAs/mRNAs. Results showed that among the total of 806 unique miRNAs targets, 194 miRNAs were DE after I/R in diabetic rabbits. Specifically, eight miRNAs, including miR-199a-5p, miR-154-5p, miR-543-3p, miR-379-3p, miR-379-5p, miR-299-5p, miR-140-3p, and miR-497-5p, were upregulated and 10 miRNAs, including miR-1-3p, miR-1b, miR-29b-3p, miR-29c-3p, miR-30e-3p, miR-133c, miR-196c-3p, miR-322-5p, miR-499-5p, and miR-672-5p, were significantly downregulated after I/R injury. Interestingly, RAPA treatment significantly reversed these changes in miRNAs. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) enrichment analysis indicated the participation of miRNAs in the regulation of several signaling pathways related to I/R injury, including MAPK signaling and apoptosis. Furthermore, in diabetic hearts, the expression of lncRNAs, HOTAIR, and GAS5 were induced after I/R injury, but RAPA suppressed these lncRNAs. In contrast, MALAT1 was significantly reduced following I/R injury, with the increased expression of miR-199a-5p and suppression of its target, the anti-apoptotic protein Bcl-2. RAPA recovered MALAT1 expression with its sponging effect on miR-199-5p and restoration of Bcl-2 expression. The identification of novel targets from the transcriptome analysis in RAPA-treated diabetic hearts could potentially lead to the development of new therapeutic strategies for diabetic patients with myocardial infarction. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
37. Toxicity of Pesticides Applied in European Vineyards on Anagyrus vladimiri and Trichogramma evanescens , Parasitoids of Planococcus ficus and Lobesia botrana.
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Mansour, Ramzi, Bauer, Anna Lena, Goodarzi, Maryam, and Hoffmann, Christoph
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PESTICIDES , *TRICHOGRAMMA , *BIOPESTICIDES , *PEST control , *VINEYARDS , *INSECTICIDES , *INTEGRATED pest control - Abstract
Simple Summary: The toxicity of four insecticides and one fungicide commonly applied in German (European) vineyards was evaluated on pupae and adults of the parasitoids Anagyrus vladimiri and Trichogramma evanescens. The insecticides lambda-cyhalothrin, flupyradifurone, acetamiprid, and cyantraniliprole and the fungicide spiroxamine did not significantly affect the development of the pupal stage inside mealybug mummies or the emergence of the parasitoid A. vladimiri. The highest mortality percentages of emerged A. vladimiri parasitoids were induced by flupyradifurone, acetamiprid, or spiroxamine. All pesticides, except cyantraniliprole, significantly affected the development of the pupal stage and the emergence of the parasitoid T. evanescens. Regarding direct contact toxicity, the highest percentages (100%) of A. vladimiri adult parasitoid mortality were obtained in the flupyradifurone, acetamiprid, and spiroxamine treatments (all three classified as harmful), while the lowest mortality percentages were observed in lambda-cyhalothrin and cyantraniliprole (both classified as slightly harmful). The highest percentages (100%) of adult T. evanescens mortality were found in the flupyradifurone, acetamiprid, and spiroxamine treatments, while the lowest mortality percentages were observed in lambda-cyhalothrin and cyantraniliprole treatments. Risk assessments of chemical pesticides toward natural enemies are crucial for ensuring sustainable grapevine-integrated pest management. In this context, laboratory experiments were conducted to evaluate the toxicity of four insecticides (lambda-cyhalothrin, flupyradifurone, acetamiprid, and cyantraniliprole) and one fungicide (spiroxamine) commonly applied in German (European) vineyards on the pupae and adults of both Anagyrus vladimiri, a parasitoid of the vine mealybug Planococcus ficus, and Trichogramma evanescens, a parasitoid of the European grapevine moth, Lobesia botrana. The tested pesticides did not significantly affect the development of the pupal stage inside mealybug mummies or the emergence of the parasitoid A. vladimiri. The pesticides flupyradifurone, acetamiprid, and spiroxamine resulted in the highest mortality percentages for all emerged A. vladimiri parasitoids at 8 and 10 days after treatment compared with either in lambda-cyhalothrin or cyantraniliprole. However, all pesticides, except the diamide insecticide cyantraniliprole, significantly affected the development of the pupal stage and the emergence of the parasitoid T. evanescens. The percentages of T. evanescens emergence following the application of the fungicide spiroxamine or either lambda-cyhalothrin or flupyradifurone were significantly higher than those observed in the acetamiprid treatment. Regarding direct contact toxicity, the highest percentages (100%) of A. vladimiri adult parasitoid mortality were obtained in the flupyradifurone, acetamiprid, and spiroxamine treatments, while the lowest mortality percentages were observed in lambda-cyhalothrin, cyantraniliprole, and untreated control treatments. According to the IOBC classes of toxicity, flupyradifurone, acetamiprid, and spiroxamine were classified as harmful, while both lambda-cyhalothrin and cyantraniliprole were classified as slightly harmful to A. vladimiri adults. As such, all pesticides had a significant impact on the survival of exposed T. evanescens adults. The highest percentages of adult T. evanescens mortality were obtained in the flupyradifurone, acetamiprid, and spiroxamine treatments, with the fungicide spiroxamine resulting in significantly higher mortality percentages than either flupyradifurone or acetamiprid, while the lowest mortality percentages were found in the lambda-cyhalothrin and cyantraniliprole treatments. Therefore, applying the insecticides acetamiprid and/or flupyradifurone and the fungicide spiroxamine should be avoided when A. vladimiri and/or T. evanescens are naturally present or released in grapes. The insights gained from these two easy-to-rear parasitoid species allow analogous conclusions to be drawn for closely related species in vineyards belonging to either family Encyrtidae or Trichogrammatidae, which are not easy to rear. Interestingly, using the safer insecticides lambda-cyhalothrin and/or cyantraniliprole could be compatible with both parasitoid species, which could be sustainably exploited in either conservation or augmentative biological control in vineyards. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
38. Zn 2+ Differentially Influences the Neutralisation of Heparins by HRG, Fibrinogen, and Fibronectin.
- Author
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Sobczak, Amélie I. S., Ajjan, Ramzi A., and Stewart, Alan J.
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- *
FIBRONECTINS , *FIBRINOGEN , *SURFACE plasmon resonance , *BLOOD platelet activation , *FIBRIN , *GLYCOSAMINOGLYCANS - Abstract
For coagulation to be initiated, anticoagulant glycosaminoglycans (GAGs) such as heparins need to be neutralised to allow fibrin clot formation. Platelet activation triggers the release of several proteins that bind GAGs, including histidine-rich glycoprotein (HRG), fibrinogen, and fibronectin. Zn2+ ions are also released and have been shown to enhance the binding of HRG to heparins of a high molecular weight (HMWH) but not to those of low molecular weight (LMWH). The effect of Zn2+ on fibrinogen and fibronectin binding to GAGs is unknown. Here, chromogenic assays were used to measure the anti-factor Xa and anti-thrombin activities of heparins of different molecular weights and to assess the effects of HRG, fibrinogen, fibronectin, and Zn2+. Surface plasmon resonance was also used to examine the influence of Zn2+ on the binding of fibrinogen to heparins of different molecular weights. Zn2+ had no effect on the neutralisation of anti-factor Xa (FXa) or anti-thrombin activities of heparin by fibronectin, whereas it enhanced the neutralisation of unfractionated heparin (UFH) and HMWH by both fibrinogen and HRG. Zn2+ also increased neutralisation of the anti-FXa activity of LMWH by fibrinogen but not HRG. SPR showed that Zn2+ increased fibrinogen binding to both UFH and LMWH in a concentration-dependent manner. The presented results reveal that an increase in Zn2+ concentration has differential effects upon anticoagulant GAG neutralisation by HRG and fibrinogen, with implications for modulating anti-coagulant activity in plasma. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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- View/download PDF
39. D2WFP: A Novel Protocol for Forensically Identifying, Extracting, and Analysing Deep and Dark Web Browsing Activities.
- Author
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Ghanem, Mohamed Chahine, Mulvihill, Patrick, Ouazzane, Karim, Djemai, Ramzi, and Dunsin, Dipo
- Subjects
DARKNETS (File sharing) ,WEB browsing ,IDENTIFICATION ,COMPUTER crimes ,INVISIBLE Web - Abstract
The use of the unindexed web, commonly known as the deep web and dark web, to commit or facilitate criminal activity has drastically increased over the past decade. The dark web is a dangerous place where all kinds of criminal activities take place, Despite advances in web forensic techniques, tools, and methodologies, few studies have formally tackled dark and deep web forensics and the technical differences in terms of investigative techniques and artefact identification and extraction. This study proposes a novel and comprehensive protocol to guide and assist digital forensic professionals in investigating crimes committed on or via the deep and dark web. The protocol, named D2WFP, establishes a new sequential approach for performing investigative activities by observing the order of volatility and implementing a systemic approach covering all browsing-related hives and artefacts which ultimately resulted in improving the accuracy and effectiveness. Rigorous quantitative and qualitative research has been conducted by assessing the D2WFP following a scientifically sound and comprehensive process in different scenarios and the obtained results show an apparent increase in the number of artefacts recovered when adopting the D2WFP which outperforms any current industry or opensource browsing forensic tools. The second contribution of the D2WFP is the robust formulation of artefact correlation and cross-validation within the D2WFP which enables digital forensic professionals to better document and structure their analysis of host-based deep and dark web browsing artefacts. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
40. Acute Exercise Promptly Normalizes Myocardial Myosin Heavy-Chain Isoform mRNA Composition in Diabetic Rats: Implications for Diabetic Cardiomyopathy.
- Author
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Al-Horani, Ramzi Ahmad, Janaydeh, Saja, Al-Trad, Bahaa, Aljanabi, Mukhallad Mohammed, and Muhaidat, Riyadh
- Subjects
DIABETIC cardiomyopathy ,MYOSIN ,MESSENGER RNA ,GENE expression ,RATS - Abstract
Background and Objectives: The acute effects of exercise on the myosin heavy-chain (MHC) isoform mRNA expression and the upstream transcription factors in diabetic and non-diabetic hearts remain unexplored. We aimed to determine the acute effect of a single exercise session on the expression of left ventricular MHC, MHC-α and MHC-β, and thyroid receptor (TR), TR-α1 and TR-β, isoform mRNA in diabetic and non-diabetic rats. Materials and Methods: Sprague-Dawley rats were assigned to four groups: non-diabetic control (CS), diabetic exercise (DIEX), sedentary diabetic (DIS), and non-diabetic exercise (CEX). Diabetes was induced via streptozotocin injection (55 mg/kg). DIEX and CEX rats performed an exercise session (60 min at 50 m/min and 0% grade) 6–7 weeks after diabetes induction. Results: MHC-α mRNA was lower in DIS (p = 0.03) and not different in DIEX (p = 0.1) relative to CS. DIS showed higher MHC-β mRNA than the non-diabetic rats, CS and CEX (p = 0.02 and p = 0.009, respectively). MHC-β mRNA in DIEX was normalized to non-diabetic levels in CS (p = 0.3). TR-α1 was higher in DIS and not different in DIEX relative to CS and CEX (p = 0.03 and p = 1.0, respectively). In CEX, exercise did not change MHC-α, MHC-β, and TR-α1 relative to CS (p = 1.0). TR-β was not different between groups. Conclusion: In conclusion, exercise appears to acutely normalize the myocardial MHC and TR isoform mRNA expression only in the diabetic heart. These responses may induce therapeutic mechanisms other than changing the MHC isoform composition. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
41. Coverage Strategy for Small-Cell UAV-Based Networks in IoT Environment.
- Author
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Aoueileyine, Mohamed Ould-Elhassen, Allani, Ramzi, Bouallegue, Ridha, and Yazidi, Anis
- Subjects
- *
REMOTE access networks , *MACHINE learning , *NASH equilibrium , *WIRELESS communications , *INTERNET of things , *DRONE aircraft - Abstract
In wireless communication, small cells are low-powered cellular base stations that can be used to enhance the coverage and capacity of wireless networks in areas where traditional cell towers may not be practical or cost-effective. Unmanned aerial vehicles (UAVs) can be used to quickly deploy and position small cells in areas that are difficult to access or where traditional infrastructure is not feasible. UAVs are deployed by telecommunication service providers to provide aerial network access in remote rural areas, disaster-affected areas, or massive-attendance events. In this paper, we focus on the scheduling of beaconing periods as an efficient means of energy consumption optimization. The conducted study provides a sub-modular game perspective of the problem and investigates its structural properties. We also provide a learning algorithm that ensures convergence of the considered UAV network to a Nash equilibrium operating point. Finally, we conduct extensive numerical investigations to assist our claims about the energy and data rate efficiency of the strategic beaconing policy (at Nash equilibrium). [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
42. Therapeutic Study of Cinnamic Acid Derivative for Oxidative Stress Ablation: The Computational and Experimental Answers.
- Author
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Ojo, Oluwafemi Adeleke, Ogunlakin, Akingbolabo Daniel, Maimako, Rotdelmwa Filibis, Gyebi, Gideon Ampoma, Olowosoke, Christopher Busayo, Taiwo, Odunayo Anthonia, Elebiyo, Tobiloba Christiana, Adeniyi, David, David, Bolaji, Iyobhebhe, Matthew, Adetunji, Juliana Bunmi, Ayokunle, Damilare IyinKristi, Ojo, Adebola Busola, Mothana, Ramzi A., and Alanzi, Abdullah R.
- Subjects
CINNAMIC acid derivatives ,OXIDATIVE stress ,ADENOSINE triphosphatase ,CELL communication ,MALONDIALDEHYDE - Abstract
This study aimed to examine the therapeutic activity of the cinnamic acid derivative KAD-7 (N′-(2,4-dichlorobenzylidene)-3-(4-methoxyphenyl) acrylohydrazide) on Fe
2+ -induced oxidative hepatic injury via experimental and computational models. In addition, the role of ATPase and ectonucleoside triphosphate diphosphohydrolase (ENTPDase) in the coordination of cellular signals is speculated upon to proffer suitable therapeutics for metabolic stress disorder upon their inhibition. While we know little about therapeutics with flexible dual inhibitors for these protein targets, this study was designed to screen KAD-7's (N′-(2,4-dichlorobenzylidene)-3-(4-methoxyphenyl) acrylohydrazide) inhibitory potential for both protein targets. We induced oxidative hepatic damage via the incubation of hepatic tissue supernatant with 0.1 mM FeSO4 for 30 min at 37 °C. We achieved the treatment by incubating the hepatic tissues with KAD-7 under the same conditions. The catalase (CAT), glutathione (GSH), malondialdehyde (MDA), ATPase, and ENTPDase activity were all measured in the tissues. We predicted how the drug candidate would work against ATPase and ENTPDase targets using molecular methods. When hepatic injury was induced, there was a significant decrease in the levels of the GSH, CAT, and ENTPDase (p < 0.05) activities. In contrast, we found a noticeable rise in the MDA levels and ATPase activity. KAD-7 therapy resulted in lower levels of these activities overall (p < 0.05), as compared to the control levels. We found the compound to have a strong affinity for ATPase (−7.1 kcal/mol) and ENTPDase (−7.4 kcal/mol), and a better chemical reactivity than quercetin. It also met all drug-likeness parameters. Our study shows that KAD-7 can protect the liver from damage caused by FeSO4 by reducing oxidative stress and purinergic actions. Our studies indicate that KAD-7 could be developed as a therapeutic option since it can flexibly inhibit both ATPase and ENTPDase. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
43. Genetic Structure and Diversity Analysis of Tunisian Orobanche spp. and Phelipanche spp. Using Molecular Markers.
- Author
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Khamassi, Khalil, Abbes, Zouhaier, Tani, Eleni, Katsileros, Anastasios, Guenni, Karim, Rouissi, Mustapha, Khoufi, Sahari, Chaabane, Ramzi, Chachalis, Demosthenis, and Kharrat, Mohamed
- Subjects
BROOMRAPES ,GENETIC variation ,CROPS ,PARASITIC plants ,POPULATION differentiation ,LEGUMES - Abstract
Broomrapes (Orobanche and Phelipanche spp.) are non-achlorophyllous parasitic plants belonging to the Orobanchaceae family, with some species evolving to infest agricultural crops, causing substantial economic losses. This study focuses on Orobanche and Phelipenche species prevalent in Tunisia, particularly Orobanche crenata, Orobanche foetida and Phelipanche ramosa, which pose a significant threat to legume crops and other agronomically important plants. These parasitic species cause severe damage before their aboveground appearance, making early detection and management crucial. Successful breeding programs targeting their hosts necessitate a comprehensive understanding of the genetic variability within different broomrape populations. A plethora of molecular markers, including RAPD, ISSR, AFLP, SSR and SNPs, were employed to evaluate the genetic diversity of Orobanche spp., mainly in Mediterranean countries. This research seeks to analyze the genetic variability and structure of thirty-four (34) Tunisian Orobanche and Phelipanche populations infesting various crops and wild plants. The results demonstrated a higher genetic differentiation within populations rather than between populations and no clear differentiation based on the geographic origins of the populations. By measuring the genetic diversity of a large number of broomrape populations that affect both wild species and crops, this study aims to support efforts toward establishing effective management approaches. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
44. Screening of Phytochemical, Antimicrobial, and Antioxidant Properties of Juncus acutus from Northeastern Morocco.
- Author
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Hammouti, Yousra, Elbouzidi, Amine, Taibi, Mohamed, Bellaouchi, Reda, Loukili, El Hassania, Bouhrim, Mohamed, Noman, Omar M., Mothana, Ramzi A., Ibrahim, Mansour N., Asehraou, Abdeslam, El Guerrouj, Bouchra, and Addi, Mohamed
- Subjects
CANDIDA ,PLANT extracts ,HIGH performance liquid chromatography ,OXIDANT status ,MICROCOCCUS luteus ,PENICILLIUM digitatum - Abstract
Juncus acutus, acknowledged through its indigenous nomenclature "samar", is part of the Juncaceae taxonomic lineage, bearing considerable import as a botanical reservoir harboring conceivable therapeutic attributes. Its historical precedence in traditional curative methodologies for the alleviation of infections and inflammatory conditions is notable. In the purview of Eastern traditional medicine, Juncus species seeds find application for their remedial efficacy in addressing diarrhea, while the botanical fruits are subjected to infusion processes targeting the attenuation of symptoms associated with cold manifestations. The primary objective of this study was to unravel the phytochemical composition of distinct constituents within J. acutus, specifically leaves (JALE) and roots (JARE), originating from the indigenous expanse of the Nador region in northeastern Morocco. The extraction of plant constituents was executed utilizing an ethanol-based extraction protocol. The subsequent elucidation of chemical constituents embedded within the extracts was accomplished employing analytical techniques based on high-performance liquid chromatography (HPLC). For the purpose of in vitro antioxidant evaluation, a dual approach was adopted, encompassing the radical scavenging technique employing 2,2-diphenyl-1-picrylhydrazyl (DPPH) and the total antioxidant capacity (TAC) assay. The acquired empirical data showcase substantial radical scavenging efficacy and pronounced relative antioxidant activity. Specifically, the DPPH and TAC methods yielded values of 483.45 ± 4.07 µg/mL and 54.59 ± 2.44 µg of ascorbic acid (AA)/mL, respectively, for the leaf extracts. Correspondingly, the root extracts demonstrated values of 297.03 ± 43.3 µg/mL and 65.615 ± 0.54 µg of AA/mL for the DPPH and TAC methods. In the realm of antimicrobial evaluation, the assessment of effects was undertaken through the agar well diffusion technique. The minimum inhibitory concentration, minimum bactericidal concentration, and minimum fungicidal concentration were determined for each extract. The inhibitory influence of the ethanol extracts was observed across bacterial strains including Staphylococcus aureus, Micrococcus luteus, and Pseudomonas aeruginosa, with the notable exception of Escherichia coli. However, fungal strains such as Candida glabrata and Rhodotorula glutinis exhibited comparatively lower resistance, whereas Aspergillus niger and Penicillium digitatum exhibited heightened resistance, evincing negligible antifungal activity. An anticipatory computational assessment of pharmacokinetic parameters was conducted, complemented by the application of the Pro-tox II web tool to delineate the potential toxicity profile of compounds intrinsic to the studied extracts. The culmination of these endeavors underpins the conceivable prospects of the investigated extracts as promising candidates for oral medicinal applications. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
45. Artificial Intelligence Reveals Distinct Prognostic Subgroups of Muscle-Invasive Bladder Cancer on Histology Images.
- Author
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Eminaga, Okyaz, Leyh-Bannurah, Sami-Ramzi, Shariat, Shahrokh F., Krabbe, Laura-Maria, Lau, Hubert, Xing, Lei, and Abbas, Mahmoud
- Subjects
- *
STAINS & staining (Microscopy) , *GENETIC mutation , *MOLECULAR diagnosis , *PATIENT selection , *ARTIFICIAL intelligence , *SLIDES (Photography) , *MOLECULAR pathology , *NON-muscle invasive bladder cancer , *CANCER patients , *RISK assessment , *HISTOLOGY , *TUMOR markers , *PHENOTYPES , *DISEASE risk factors - Abstract
Simple Summary: This study developed an interpretable scoring system using artificial intelligence and bladder tissue images. It identified two distinct risk groups with different outcomes in high-grade bladder cancer. The scoring system was associated with various molecular features and gene mutations. This system can save shared clinical decision making and cost by identifying patients who need further molecular testing. Muscle-invasive bladder cancer (MIBC) is a highly heterogeneous and costly disease with significant morbidity and mortality. Understanding tumor histopathology leads to tailored therapies and improved outcomes. In this study, we employed a weakly supervised learning and neural architecture search to develop a data-driven scoring system. This system aimed to capture prognostic histopathological patterns observed in H&E-stained whole-slide images. We constructed and externally validated our scoring system using multi-institutional datasets with 653 whole-slide images. Additionally, we explored the association between our scoring system, seven histopathological features, and 126 molecular signatures. Through our analysis, we identified two distinct risk groups with varying prognoses, reflecting inherent differences in histopathological and molecular subtypes. The adjusted hazard ratio for overall mortality was 1.46 (95% CI 1.05–2.02; z: 2.23; p = 0.03), thus identifying two prognostic subgroups in high-grade MIBC. Furthermore, we observed an association between our novel digital biomarker and the squamous phenotype, subtypes of miRNA, mRNA, long non-coding RNA, DNA hypomethylation, and several gene mutations, including FGFR3 in MIBC. Our findings underscore the risk of confounding bias when reducing the complex biological and clinical behavior of tumors to a single mutation. Histopathological changes can only be fully captured through comprehensive multi-omics profiles. The introduction of our scoring system has the potential to enhance daily clinical decision making for MIBC. It facilitates shared decision making by offering comprehensive and precise risk stratification, treatment planning, and cost-effective preselection for expensive molecular characterization. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
46. The Cellular and Protein Arms of Coagulation in Diabetes: Established and Potential Targets for the Reduction of Thrombotic Risk.
- Author
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Safdar, Nawaz Z., Kietsiriroje, Noppadol, and Ajjan, Ramzi A.
- Subjects
THROMBOSIS ,REDUCTION potential ,HEMATOPOIESIS ,BLOOD coagulation ,PATIENT experience ,FIBRIN ,BLOOD coagulation factors ,INSULIN - Abstract
Diabetes is a metabolic condition with a rising global prevalence and is characterised by abnormally high blood glucose levels. Cardiovascular disease (CVD) accounts for the majority of deaths in diabetes and, despite improvements in therapy, mortality and hospitalisations in this cohort remain disproportionally higher compared to individuals with normal glucose metabolism. One mechanism for increased CVD risk is enhanced thrombosis potential, due to altered function of the cellular and acellular arms of coagulation. Different mechanisms have been identified that mediate disordered blood clot formation and breakdown in diabetes, including dysglycaemia, insulin resistance, and metabolic co-morbidities. Collectively, these induce platelet/endothelial dysfunction and impair the fibrinolytic process, thus creating a prothrombotic milieu. Despite these abnormalities, current antithrombotic therapies are largely similar in diabetes compared to those without this condition, which explains the high proportion of patients experiencing treatment failure while also displaying an increased risk of bleeding events. In this narrative review, we aimed to summarise the physiological functioning of haemostasis followed by the pathological effects of diabetes mellitus on platelets and the fibrin network. Moreover, we carefully reviewed the literature to describe the current and future therapeutic targets to lower the thrombosis risk and improve vascular outcomes in diabetes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
47. Phytochemical Profile, Antilipase, Hemoglobin Antiglycation, Antihyperglycemic, and Anti-Inflammatory Activities of Solanum elaeagnifolium Cav.
- Author
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Bouslamti, Mohammed, Elrherabi, Amal, Loukili, El Hassania, Noman, Omar M., Mothana, Ramzi A., Ibrahim, Mansour N., Abdnim, Rhizlan, Slighoua, Meryem, Bouhrim, Mohamed, Bnouham, Mohamed, Lyoussi, Badiaa, and Benjelloun, Ahmed Samir
- Subjects
ANTI-inflammatory agents ,SOLANUM ,HEMOGLOBINS ,GLUCOSE tolerance tests ,PLANT extracts ,PANCREATIC enzymes ,LIPASES - Abstract
In the present investigation, the phenolic compounds of Solanum elaeagnifolium were identified, and the plant's anti-lipase and anti-glycation effects on hemoglobin were discovered through in vitro experiments, as well as its short-term antihyperglycemic and anti-inflammatory effects. The chemical compound composition was detected using HPLC-DAD, the anti-lipase activity was tested in vitro using 4-nitrophenyl butyrate as a substrate, and the antiglycation activity of the plant extracts was also tested in vitro using a haemoglobin model. The antihyperglycemic effect was determined by inhibiting pancreatic α-amylase and α-glycosidase activity and performing an in vivo glucose tolerance test on normal rats, and the anti-inflammatory activity was determined by inducing paw inflammation with carrageenan. In both the SEFR (fruit) and SEFE (leaf) extracts, chromatographic analysis revealed the presence of quercetin 3-O-β-D-glucoside, rutin, and quercetin. SEFR inhibited the pancreatic lipase enzyme more effectively, with an IC
50 of 0.106 ± 0.00 mg/mL. S. elaeagnifolium extracts demonstrated significant antiglycation activity, with 3.990 ± 0.23 mg/mL of SEFE and 3.997 ± 0.14 mg/mL of SEFR. When compared to positive and negative controls, plant extracts had very significant anti-diabetic and anti-inflammatory effects. The findings in this study and previous research on this plant encourage us to investigate other pharmacological activities of this plant besides its duiretic, cictrisant, and anti-ulcer activity. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
48. A Two-Degree-of-Freedom PID Integral Super-Twisting Controller Based on Atom Search Optimizer Applied to DC-DC Interleaved Converters for Fuel Cell Applications.
- Author
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Saadi, Ramzi, Hammoudi, Mohamed Yacine, Salah, Okba, Laadjal, Khaled, and Cardoso, Antonio J. Marques
- Subjects
DC-to-DC converters ,OPTIMIZATION algorithms ,PID controllers ,ELECTRONIC excitation ,ATOMS ,SWARM intelligence ,MAXIMUM power point trackers - Abstract
This paper focuses on the real-time implementation of an optimal high-performance control applied to an interleaved nonisolated DC/DC converter designed for fuel cell applications. Three-phase interleaved boost converters are utilized to minimize input current undulation, increase efficiency, and provide a high output voltage in order to ensure the performance of the FC stack. The proposed control strategy contains an outer loop that generates the reference current based on a two-degree-of-freedom PID controller. This controller provides a robust setpoint tracking and disturbance rejection, which improves the system's response and efficiency. A fast inner regulation loop based on a super-twisting integral sliding mode (STISM) algorithm is developed to achieve a fixed converter output voltage, equitable phase current sharing, and fast regulation against load disturbances in failure operation. The STISM algorithm exhibits a rapid convergence property of the sliding mode and effectively avoids the chattering phenomena frequently observed in conventional sliding modes. The proposed controller's gains are determined using the atom search optimization algorithm, which ensures exceptional reliability and a high degree of robustness and stability of the controllers under a variety of operational conditions. This method is inspired from the behavior of atoms and their electrons during the excitation process leading to a one-of-a-kind optimization technique which contributes to the controller's reliability. Using Matlab-Simulink simulation tools, the efficacy and performance of the designed control have first been evaluated and assessed and compared with other optimization algorithms, and then with a dual loop based on a PID controller. Then, they have been verified by real-time hardware implementation on a 1.2 KW prototype FC converter driven by the dSPACE-1104 card under a variety of tests. The suggested approach offers impressive experimental results in dynamic and steady states. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
49. Treatment of Produced Water Using Prepared Activated Carbon-Based Sewage Sludge.
- Author
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Al Dawery, Salam K., Al-Sawai, Maroa K., Al Muzami, Ghatara M. S., Annamareddy, Sri Hari K., Al Dawari, Muataz S., Harharah, Ramzi H., Harharah, Hamed N., and Amari, Abdelfattah
- Subjects
OIL field brines ,WATER purification ,WATER use ,EXOTHERMIC reactions ,PHYSISORPTION - Abstract
Removal of organic pollutants and metal ions from produced water by adsorption, using prepared activated carbon (AC) from sewage sludge, with chemical activations using NaOH, KOH and ZnCl
2 separately and pyrolysis at different temperatures (500, 600 and 700 °C). Pure sludge and prepared ACs were analyzed using FTIR and XRD. The results showed 18% crystallinity compared to that of commercial AC, which has 44% crystallinity. The results of FTIR demonstrate that the properties of the post-treated affect the final products depending on the method used and that it contains similar functional groups to those present in the commercial AC, but at a higher peak intensity. Adsorption treatments were carried out at 25, 35 and 45 °C solution temperatures. The results showed that the removal of pollutants from produced water using prepared AC with all types of chemical activations reached 99.5%, such as commercial AC with 0.06 g dosage of adsorbent at pyrolysis temperatures of 500 and 600 °C and a solution temperature of 25 °C. The obtained results refer to the mechanism of exothermic reaction and physical adsorption. It was observed that despite the lower dosage of adsorbent of 0.01 g, a sufficient treatment of pollutants was achieved. This reveals the effectiveness of using sewage sludge as a cheap adsorbent. Also, using pure sewage sludge, the adsorption data showed a 95.2% removal of the pollutants. This result indicated that pure sludge has an efficient adsorption capacity and can be utilized as a cheap and environmentally friendly material. For the removal of manganese and cadmium metal ions from the produced water, the resultant data showed that more than 90% of manganese was adsorbed and more than 97% of cadmium was adsorbed, especially when using pure sewage sludge and prepared activated carbon with NaOH chemical activation at pyrolysis temperatures of 500 °C and 600 °C. [ABSTRACT FROM AUTHOR]- Published
- 2023
- Full Text
- View/download PDF
50. Trends of Coagulation Parameters in Human Immunodeficiency Virus Patients.
- Author
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Bashir, Bashir Abdrhman, Mohamed, Mohamed Hassan, Hussain, Mohamed A., Osman, Wadah, Mothana, Ramzi A., and Hasson, Sidgi
- Subjects
THROMBOTIC thrombocytopenic purpura ,HIV ,PHOSPHOLIPID antibodies ,BLOOD coagulation ,PARTIAL thromboplastin time ,HIV-positive persons - Abstract
Background and Objectives: HIV disease is recognized to cause inconsistencies in coagulation via various pathways during infection. Some studies have indicated that HIV-infected patients are prone to developing thrombocytopenia, thrombosis, or autoantibodies that may cause difficulties in diagnosis. This study is intended to measure the trend of coagulation parameters in Sudanese patients with HIV. Materials and Methods: A cross-sectional study was carried out in patients with HIV admitted to the Sudan National AIDS Program (SNAP) from January 2018 to December 2019. Prothrombin time (PT), partial thromboplastin time (PTT), thrombin time (TT), D-dimer (DD), hemoglobin (HB), total lymphocyte count (TLC), platelet count (PLT), and a disintegrin and metalloproteinase with thrombospondin type 1 motif, member 13 (ADAMTS13), were evaluated among HIV Sudanese patients. Results: Out of the 44 HIV patients included, 6 (13.6%) were found to have thrombotic thrombocytopenic purpura-like events and 12 (27.2%) had antiphospholipid antibodies, of whom 8 (66.6%) showed anticardiolipin antibody (1gG (75%) and IgM (25%)) and 4 showed lupus anticoagulants. The HB, TLC, and PLT values were found to be significantly lower in HIV patients than in control (p = 0.000, 0.000, and 0.050, respectively). The PT and ADAMTS13 values showed no significant difference between HIV patients and control (p = 0.613 and 0.266, respectively). The PTT, TT, and DD values were found to be augmented in HIV patients versus the control (p = 0.000). Conclusions: Thrombotic thrombocytopenic purpura-like events among HIV Sudanese patients were explored. In addition, antiphospholipid antibodies were strikingly seen in these patients. Additional research is anticipated to confirm these diagnoses. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
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