186 results on '"Ahmed Abd El Aal"'
Search Results
2. Polyurethane reinforced with micro/nano waste slag as a shielding panel for photons (experimental and theoretical study)
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Ahmed M. El-Khatib, Mahmoud I. Abbas, Mohamed E. Mahmoud, Mohammed Fayez-Hassan, Mamdouh H. Khalil, and Ahmed Abd El Aal
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Polyurethane ,Nano composite ,Waste iron slag ,Shielding parameters ,Thermogravimetric analysis ,X-ray diffraction ,Medicine ,Science - Abstract
Abstract This study not only provides an innovative technique for producing rigid polyurethane foam (RPUF) composites, but it also offers a way to reuse metallurgical solid waste. Rigid polyurethane (RPUF) composite samples have been prepared with different proportions of iron slag as additives, with a range of 0–25% mass by weight. The process of grinding iron slag microparticles into iron slag nanoparticles powder was accomplished with the use of a high-energy ball mill. The synthesized samples have been characterized using Fourier Transform Infrared Spectroscopy, and Scanning Electron Microscope. Then, their radiation shielding properties were measured by using A hyper-pure germanium detector using point sources 241Am, 133 BA, 152 EU, 137Cs, and 60Co, with an energy range of 0.059–1.408 MeV. Then using Fluka simulation code to validate the results in the energy range of photon energies of 0.0001–100 MeV. The linear attenuation coefficient, mass attenuation coefficient, mean free path, half-value layer and tenth-value layer, were calculated to determine the radiation shielding characteristics of the composite samples. The calculated values are in good agreement with the calculated values. The results of this study showed that the gamma-ray and neutron attenuation parameters of the studied polyurethane composite samples have improved. Moreover, the effect of iron slag not only increases the gamma-ray attenuation shielding properties but also enhances compressive strength and the thermal stability. Which encourages us to use polyurethane iron-slag composite foam in sandwich panel manufacturing as walls to provide protection from radiation and also heat insulation.
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- 2024
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3. Seismic attributes and spectral decomposition-based inverted porosity-constrained simulations for appraisal of shallow-marine lower-Cretaceous sequences of Miano gas field, Southern Pakistan
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Muhammad Tayyab Naseer, Shazia Naseem, Abha Singh, Perveiz Khalid, Ahmed E. Redwan, Wei Li, Faisal Muhammad Faisal Rafiq, Ilyas Khan, Ahmed Abd El Aal, Hezam Al-Awah, and George Kontakiotis
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Wavelet-based transform (CWT)-Spectral decomposition (SD) ,Miano gas field ,Acoustic impedances wedge ,Porosity prediction ,Incised-valley sand-filled reservoirs ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Seismic attributes can play an important role in the exploration of hydrocarbon-bearing stratigraphic systems. Incised valley systems are developed during the falling sea, which causes the deposition of coarse-grained sandstone facies inside the low-standing tracts (LST). These regional phenomena constrain the quantitative attributes of ultra-thin-bedded stratigraphic petroleum traps, e.g., vertical and lateral variations in the thickness, accommodation space, lithology, and porosity. This study deals with the application of the continuous wavelet transform (CWT) of a spectral decomposition (SD) tool on a 3D post-stack seismic volume of the Miano gas Field, Lower Indus basin, Pakistan. The results show that the CWT accurately detected the regionally faulted/fractured system and distinguished the frequency-dependent amplitude anomalies. The wedge model resolved a 24-meter-thick gas-bearing resource. Quality control analysis was carried out using CWT-based broadband processing between the designed amplitude spectrum of 17 Hz and 70 Hz. The reservoirs with over 25% porosity that were located within the shale-dominated facies with less than 8% porosity were imaged through the processing of the instantaneous spectral porosity model at the 48-Hz tuning block. Moreover, 190 to 165-m-thick thin-bedded sandstone reservoirs at a 25% porosity zone were resolved using 22-Hz and 28-Hz, which implicates the sea standstill and medium-to-coarse-grained depositional reservoir facies. The ultra-thin-bedded traps inside the laterally continuous stratigraphic lens of 121 m and the prograding clinoform lens of 101-m within the incised valley petroleum system were resolved using 48-Hz, which implicates the falling sea and fine-scaled transgressed erosional facies. These implications suggest that the identified regional stratigraphic traps have development potential for this gas field. The treatment of the inverted model at the highest frequencies can be utilized to investigate the porous stratigraphically trapped facies of LST and can serve as an important analogue for the leading gas field of the Indus Basin and similar basins.
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- 2024
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4. Smart waste management perspective of COVID-19 healthy personal protective materials in concrete for decorative landscape pavements and artificial rocks
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Ahmed Abd El Aal, Mabkhoot A. Alsaiari, Ahmed E. Radwan, and Amr Fenais
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Medicine ,Science - Abstract
Abstract This paper presents a new method for determining the effect of healthy personal protective material (HPPM) stripes, such as surgical masks, protective suits, and overhead and foot covers, on the durability and physicomechanical characteristics of concrete for use in architectural forms. Because of the current global epidemic caused by coronavirus (COVID-19), the use of HPPM, such as surgical masks, protective suits, and overhead and foot covers, has increased considerably. COVID-19’s second and third waves are currently affecting various countries, necessitating the use of facemasks (FM). Consequently, millions of single FM have been discharged into the wild, washing up on beaches, floating beneath the seas, and ending up in hazardous locations. The effect of stripe fibers on the physicomechanical characteristics of concrete, such as the workability, Uniaxial Compressive Strength UCS, flexural strength, impact strength, spalling resistance, abrasion resistance, sorptivity, Water absorption Sw, porosity (ηe), water penetration, permeability, and economic and eco-friendly aspects, need to be determined. With a focus on HPPM, especially single-use facemasks, this study investigated an innovative way to incorporate pandemic waste into concrete structures. Scanning electron microscope and X-ray diffraction patterns were employed to analyze the microstructures and interfacial transition zones and to identify the elemental composition. The HPPM had a pore-blocking effect, which reduced the permeability and capillary porosity. Additionally, the best concentrations of HPPM, particularly of masks, were applied by volume at 0, 1, 1.5, 2.0, and 2.5%. The use of mixed fibers from different HPPMs increased the strength and overall performance of concrete samples. The tendency of growing strength began to disappear at approximately 2%. The results of this investigation showed that the stripe content had no effect on the compressive strength. However, the stripe is critical for determining the flexural strength of concrete. The UCS increased steadily between 1 and 1.5% before falling marginally at 2.5%, which indicates that incorporating HPPM into concrete had a significant impact on the UCS of the mixture. The addition of HPPM to the mixtures considerably modified the failure mode of concrete from brittle to ductile. Water absorption in hardened concrete is reduced when HPPM stripes and fibers were added separately in low-volume fractions to the concrete mixture. The concrete containing 2% HPPM fibers had the lowest water absorption and porosity percentage. The HPPM fibers were found to act as bridges across cracks, enhancing the transfer capability of the matrices. From a technological and environmental standpoint, this study found that using HPPM fibers in the production of concrete is viable.
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- 2023
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5. Application of a rehabilitation program for executive functions in a sample of Egyptian children with learning disorder
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Engy Samy Elhakeem, Soha Abd Elatif Ahmed Ibrahim, Riham Mohamed El-Maghraby, and Ahmed Abd El Aal Fouad
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Executive functions ,Learning disorder ,Children ,Dyslexia ,ADHD ,Otorhinolaryngology ,RF1-547 - Abstract
Abstract Background In recent years, significant progress has been made on ways to improve executive function (EF) skills for school readiness involving direct EF training and classroom educational programs. Due to the absence of a well-structured Arabic program for EF training in children, the rationale of this study is to implement a comprehensive, evidence-based intervention program to help Egyptian children with learning disorders to overcome their EF impairment. It uses the multimodality approach to help meet the needs of students with a variety of learning styles. The aim of this study is to adapt the combined form of the “Executive Functions Training-Elementary” and the “Promoting Executive Function In The Classroom” programs and its application to test its effectiveness in the rehabilitation of Egyptian learning-disordered children. Results The results showed significant improvement in the Arabic version of Barkley Deficits in Executive Functioning Scale, Children and Adolescents long-form (BDEFS-CA) scores for executive functions (EF) evaluation (executive function summery score from 228.63 to 213.77 with p-value
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- 2023
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6. Sustainable Impact of Coarse Aggregate Crushing Waste (CACW) in Decreasing Carbon Footprint and Enhancing Geotechnical Properties of Silty Sand Soil
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Gamil M. S. Abdullah, Ahmed Abd El Aal, Mabkhoot Al Saiari, and Ahmed E. Radwan
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aggregate waste materials ,geotechnical properties ,ultrasonic waves ,Najran area ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
People are forced to use all types of soil, especially bad soils, as infrastructure demands grow. Different procedures must be used to ameliorate these poor soils, which are fragile during building. Natural resource depletion and the rising costs of available materials force us to consider alternative supplies. For several years, researchers have investigated the use of by-products from industry and associated approaches to improve the qualities of various soils. Coarse Aggregate Crushing Waste (CACW) is a waste product that results from the primary crushing of aggregates. Massive amounts of CACW are produced in the business, posing serious issues from handling to disposal. As a result, the widespread use of CACW for diverse purposes has been recommended in the civil engineering profession to address these concerns. Because some natural resources, such as gravel, are nonrenewable, it is vital to decrease their consumption and replace them with recycled, cost-effective, and ecologically acceptable alternatives. This research aimed to investigate the possibility of reusing CACW to improve the geotechnical properties of silty sand (SM) soil available in the Najran region. In this research, soil samples were collected from Najran city and subjected to a variety of lab experiments to determine their characterization. Mixes were designed for a parent soil with a range of percentages of CACW with/without 2% cement. The designed mixes were examined through a set of lab tests to obtain the optimum design for use in road construction. The findings of the tests showed that the optimum dosage is 10% CACW with 2% cement, raising the undrained shear strength of silty sand soil by 323%, CBR by 286%, and P-wave by 180%. The durability tests show that soil mixed with 10% CACW and 2% cement fulfills the requirements and stays within the 14% weight loss limit imposed by the Portland Cement Association (PCA). The microscopic investigation results confirmed the outcomes obtained by macro tests. As a result, the carbon footprint values decrease when CAWA is added, making this treatment approach almost carbon neutral. This study clarifies the long-term effects of CACW on improving the geotechnical characteristics of silty sand soil in the Najran Region of the Kingdom of Saudi Arabia and other comparable soils globally.
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- 2023
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7. Geotechnical aspects of alluvial soils at different depths under sodium chloride action in Najran region, Saudi Arabia: Field supported by laboratory tests
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Ahmed Abd El Aal, Gamil M. S. Abdullah, Hesham M. H. Zakaly, Hamdy A. Awad, Ali E. Omar, Mohamed A. H. Sakr, and Antoaneta Ene
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salts ,sodium chloride ,semi-arid soils ,stabilization ,geotechnical aspect ,Environmental sciences ,GE1-350 - Abstract
The current research study is aimed at studying the impact of sodium chloride on the performance of semi-arid soils in the Najran area of Saudi Arabia. Experimental work has been undertaken to investigate how adding salt to the semi-arid soil collected in the Najran area affects the boundaries of Atterberg, compaction characteristics, California bearing ratio, and shear strength. All testing was conducted on soil samples from different zones of the Najran area at varying depths of 1.5, 3, and 4.5 m along the soil profiles. The soil samples were analyzed individually and then compared with the same soil samples mixed with NaCl at different percentages of 5, 10, and 20% by weight of the dry soil. Using advanced techniques, such as the scanning electron microscope, energy dispersive x-ray analysis, and X-ray diffraction analysis, the stabilization process was examined. The findings revealed that NaCl significantly impacts the geotechnical characteristics of semi-arid soils. The maximum dry density increased from 1.995, 1.93, and 1.96 to 2.02, 1.99, and 2.03 g/cm3, and the optimal water content decreased from 9.47, 13.7, and 11.29 to 7.01, 9.58%, and 8.09% with 20% NaCl added at various depths, respectively. Shear resistance parameters were improved by adding 20% NaCl, where the soil cohesion increased from 0.1333, 0.0872, and 0.0533 to 0.1843, 0.1034, and 0.0372 kg/cm2, and the angle of internal friction increased from 24°, 25.5°, and 29° to 27.8°, 30°, and 33°, respectively. The liquid and plastic limits and, in turn, the plasticity index reduced as the added percentage of NaCl increased. Furthermore, the California bearing ratio percentages significantly increased and reached more than 50%. As a result, it is established that NaCl is an excellent stabilizer, especially at 20% concentration, and might be used as a sub-base substance in highway construction.
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- 2023
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8. In Situ Stress Determination Based on Acoustic Image Logs and Borehole Measurements in the In-Adaoui and Bourarhat Hydrocarbon Fields, Eastern Algeria
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Rafik Baouche, Souvik Sen, Ahmed E. Radwan, and Ahmed Abd El Aal
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geomechanical characterization ,in situ stress ,Lower Turonian ,unconventional reservoir ,tight carbonates ,fracture reactivation ,Technology - Abstract
The study of in situ stress from image logs is a key factor for understanding regional stresses and the exploitation of hydrocarbon resources. This work presents a comprehensive geomechanical analysis of two eastern Algerian hydrocarbon fields to infer the magnitudes of principal stress components and stress field orientation. Acoustic image logs and borehole measurements were used in this research to aid our understanding of regional stress and field development. The studied In-Adaoui and Bourarhat fields encompass a combined thickness of 3050 m of Paleozoic and Mesozoic stratigraphy, with the primary reservoir facies in the Ordovician interval. The Ordovician sandstone reservoir interval indicates an average Poisson’s ratio (v) of 0.3, 100–150 MPa UCS, and 27–52 GPa Young’s modulus (E). Direct formation pressure measurements indicate that the sandstone reservoir is in a hydrostatic pore pressure regime. Density-derived vertical stress had a 1.1 PSI/feet gradient. Minimum horizontal stress modeled from both Poisson’s ratio and an effective stress ratio-based approach yielded an average 0.82 PSI/feet gradient, as validated with the leak-off test data. Drilling-induced tensile fractures (DITF) and compressive failures, i.e., breakouts (BO), were identified from acoustic image logs. On the basis of the DITF criterion, the maximum horizontal stress gradient was found to be 1.57–1.71 PSI/feet, while the BO width-derived gradient was 1.27–1.37 PSI/feet. Relative stress magnitudes indicate a strike-slip stress regime. A mean SHMax orientation of N130°E (NW-SE) was interpreted from the wellbore failures, classified as B-quality stress indicators following the World Stress Map (WSM) ranking scheme. The inferred stress magnitude and orientation were in agreement with the regional trend of the western Mediterranean region and provide a basis for field development and hydraulic fracturing in the low-permeable reservoir. On the basis of the geomechanical assessments, drilling and reservoir development strategies are discussed, and optimization opportunities are identified.
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- 2023
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9. Prospect Analysis of Paleocene Coalbed Methane: A Case Study of Hangu Formation, Trans-Indus Ranges, Pakistan
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Hamza Azam Qadri, Ali Wahid, Numair Ahmed Siddiqui, Syed Haroon Ali, Ahmed Abd El Aal, Amirul Qhalis Bin Abu Rashid, and Mohd Najib Bin Temizi
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Geology ,QE1-996.5 - Abstract
The methane trapped in the coal seams has emerged as an unconventional clean energy resource worldwide in this century. The proximate composition, ultimate content, cleat structure, porosity type, and pore structures are the debatable components for its trapping mechanism. Further, the brittle and ductile properties of minerals influence in the extraction of the methane from the coal seams. In this research, Coalbed methane prospect is demonstrated by analysing the Hangu Formation’s coal seam of Trans-Indus Ranges, Pakistan. This case study is helpful to find the occurrence, trapping ability, and methane extraction capacity in its cleat structures and pores. A number of samples were tested from the different coal mines in terms of these debatable components. The results indicate that the rank of studied coal is bituminous to subbituminous in which the carbon ratio, volatile matter, and sulfur contents are increasing with depth towards the south. The transitional connected face and butt cleats are partially filled with minerals and the intergranular, dissolved, and tissue pore types are also identified in it. It can be helpful for the occurrence, migration, and trapping of methane. Furthermore, the higher surface areas and cumulative pore volumes enhance the capacity of gas adsorption with depth in the study area. Moreover, the increasing brittle minerals in the coal composition towards the south can be helpful for the fracking of coal seams for economical gas extraction. It is suggested that this workflow can be implemented in any region with same coal rank and cleat types.
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- 2022
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10. Incidence and Risk Factors of Thyroid Malignancy in Patients with Toxic Nodular Goiter
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Tarek Zaghloul Mohamed, Ahmed Abd El Aal Sultan, Mohamed Tag El-Din, Ahmed A. Elfattah Mostafa, Mohammed A. Nafea, Abd-Elfattah Kalmoush, Mohammed Shaaban Nassar, Mohamad Adel Abdalgaleel, Ahmed M. Hegab, Ayman Helmy Ibrahim, and Mohamad Baheeg
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Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background. Although hyperfunctioning thyroid disorders were thought to be protective against malignancy, some recent studies reported a high incidence of incidentally discovered cancer in patients with hyperfunctioning benign thyroid disorders. We performed this study to estimate the incidence and predictors of malignant thyroid disease in patients with toxic nodular goiter (TNG). Patients and Methods. The data of 98 patients diagnosed with TNG were reviewed (including toxic multinodular goiter SMNG and single toxic nodule STN). The collected data included patients age, gender, systemic comorbidities, family history of thyroid malignancy, previous neck radiation, type of disease (multinodular or single), size of the dominant nodule by the US, operative time, and detection of significant lymph nodes during operation. Based on the histopathological analysis, the cases were allocated into benign and malignant groups. Results. Malignancy was detected in 21 patients (21.43%). Although age distribution was comparable between the two groups, males showed a significant increase in association with malignancy. Medical comorbidities and family history of cancer did not differ between the two groups. However, TMNG showed a statistically higher prevalence in the malignant group. Operative data, including operative time and lymph node detection, were comparable between the two groups. On regression analysis, both male gender and TMNG were significant predictors of malignancy. Conclusion. The presence of thyroid hyperfunction is not a protective factor against malignancy, as malignancy was detected in about 1/5 of cases. Male gender and TMNG were significant risk factors of malignancy in such patients.
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- 2022
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11. Predictors of early recipient mortality after living donor liver transplantation in a tertiary care center in Egypt
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Mohammed A. Nafea, Ayman Alsebaey, Ahmed Abd El Aal Sultan, Mohammed Hisham Goda, Ahmed Salman, Hanaa Said Rashed, Ahmed Soliman, Mai Elshenoufy, and Mostafa Abdelrahman
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Medicine - Abstract
BACKGROUND: Living donor liver transplantation (LDLT) has evolved into a widely accepted therapeutic option. Many different risk factors may affect early mortality after LDLT. OBJECTIVES: Analyze risk factors that can affect early (
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- 2019
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12. Lichtenstein hernioplasty with monocryl-prolene composite mesh in bilateral inguinal hernia
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Ahmed Abd El Aal Sultan, Mahmoud H Morsi, and Magdy S El-Din Hussain
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bilateral inguinal hernia repair ,lichtenstein hernioplasty ,monocryl-prolene composite mesh (ultrapro) ,Internal medicine ,RC31-1245 - Abstract
Background Inguinal hernia repairs consume an important part of health care resources because of the high incidence of the problem. It is estimated that twenty million inguinal hernia repairs are performed globally every year. Lichtenstein tension-free hernia repair is considered as a gold standard technique for open inguinal hernia repair in the European guidelines on inguinal hernia. Objective The aim of this study is to evaluate the light-weight composite mesh of monocryl-prolene in bilateral inguinal hernia repair (Lichtenstein technique) regarding outcome and complications. Patients and methods A prospective interventional study was conducted on 25 patients with bilateral inguinal hernia. Complete physical examination (general and local), including PR examination; routine laboratory tests; ECG; chest radiography; and abdominopelvic ultrasound were done for all patients. Bilateral Lichtenstein procedure using monocryl-prolene mesh was planned for all patients. Patients were followed up for 12 months. Intraoperative findings (operative time and complications), hospital stay, and postoperative complications including pain and recurrence were thoroughly assessed. Results There were no intraoperative or postoperative mesh-related complications (infection or foreign body sensation), and the mesh was well accepted by all patients. No patient had significant pain related to hernia repair. No significant scrotal complications were encountered. No recurrence after 1 year of follow-up was noted. Conclusion Lichtenstein-style bilateral inguinal hernia repair using light-weight monofilament Ultrapro mesh appears quite acceptable, practical, effective, and safe for increased physical quality of life. There was no significant pain or infection in all patients, as well as no recurrence.
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- 2019
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13. Application of a rehabilitation program for executive functions in a sample of Egyptian children with learning disorder
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Elhakeem, Engy Samy, Ibrahim, Soha Abd Elatif Ahmed, El-Maghraby, Riham Mohamed, and Fouad, Ahmed Abd El Aal
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- 2023
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14. Pattern of chronic obstructive pulmonary diseases in Nasser Institute, Egypt
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Ahmed Abd El-Aal Sayed, Mona Mansour Ahmed, and Haitham Salah
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Chronic obstructive pulmonary disease patients in Nasser Institute ,Diseases of the respiratory system ,RC705-779 ,Medical emergencies. Critical care. Intensive care. First aid ,RC86-88.9 - Abstract
Abstract Background One of the most widespread chronic respiratory disease with rising morbidity and death is chronic obstructive pulmonary disease (COPD), resulting in enormous societal and economic costs. COPD is a widespread, avoidable, and curable condition characterised by usual symptoms such as dyspnea, coughing, and/or sputum production. The goal of this study was to use a COPD questionnaire to analyse clinical, demographic, and available prescription pattern for chronic obstructive pulmonary disease. Results Our findings suggest that patients’ early knowledge of COPD risk factors and symptoms and assistance in early illness detection and the provision of patient-centred treatment based on patients’ unique requirements in disease management are all necessary. Conclusion The major objective of COPD management is to control symptoms and limit the risk of exacerbation in order to enhance the quality of life of patients. In addition to pharmaceutical management, achieving these goals necessitates the adoption of a healthy lifestyle and the avoidance of risk factors.
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- 2022
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15. Evaluation of the outcome of a proposed more physiological bypass surgery technique in morbid obesity: Long term 3 years follows up
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Elbanna, Abduh, Sultan, Ahmed Abd El Aal, Helmy A, Yasser, Bakr, Ibrahim, El-Din, Mohamed Tag, Labib, Mohamed Fathy, Khalil, Osama Osman, Al-Fattah, Mohammed Abd, Safwat El kady, Abd Elrahman, Henish, Mohamed I., Anwer, Hisham W., Mostafa, Ahmed A., Abdelghaffar, Ibrahim, Elhossainy, Ahmed Fathy, Al-Aziz, Mahmoud abd Alhady Abd, Baheeg, Mohamad, Hegab, Ahmed M., Mohamed, Tarek Zaghloul, Hifny, Abdelhamid, Ibrahim, Ayman Helmy, Kalmoush, Abd-Elfattah, Borham, Marwan Mansour, Moghazy, Alsayed Basiony, Elkaseer, Mohamed Hassan, and Shaaban, Mohamed Sobhy
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- 2022
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16. Lichtenstein versus transabdominal preperitoneal (TAPP) inguinal hernia repair for unilateral non recurrent hernia: A multicenter short term randomized comparative study of clinical outcomes
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Sultan, Ahmed Abd El Aal, Abo Elazm, Hossam Attia, and Omran, Hisham
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- 2022
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17. Improvement of Coronary Calcium Scores After Bariatric Surgery in People with Severe Obesity
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Salman, Ahmed Abdallah, Matter, Mohamed, Fayad, Nabil Ibrahim, Shehata, Mohamed S. Abd Elaziz, Al-Fattah, Mohamed Abd, Elkaseer, Mohamed Hassan, Borham, Marwan Mansour, Balamoun, Hany A., Sultan, Ahmed Abd El Aal, Mikhail, Hani Maurice Sabri, Omar, Haitham S. E., Milad, Nader, Tourky, Mohamed Sabry, Elias, Abd Al-Kareem, Mostafa, Amir, Samir, Ahmad, Hussein, Amr Mahmoud, Shaaban, Hossam El-Din, Ali, Hazem Abd Allah, and Salman, Mohamed Abdalla
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- 2022
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18. Pattern of chronic obstructive pulmonary diseases in Nasser Institute, Egypt
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Sayed, Ahmed Abd El-Aal, Ahmed, Mona Mansour, and Salah, Haitham
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- 2022
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19. Variant Analysis from Bacterial Isolates Affirms DnaK Crucial for Multidrug Resistance.
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Shama Mujawar, Amr Adel Ahmed Abd El-Aal, and Chandrajit Lahiri
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- 2020
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20. Response to “Letter to the Editor” in Regard to the Article: “Improvement of Coronary Calcium Scores After Bariatric Surgery in People with Severe Obesity”
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Salman, Ahmed Abdallah, Matter, Mohamed, Fayad, Nabil Ibrahim, Shehata, Mohamed S. Abd Elaziz, Al-Fattah, Mohamed Abd, Elkaseer, Mohamed Hassan, Borham, Marwan Mansour, Balamoun, Hany A., Sultan, Ahmed Abd El Aal, Mikhail, Hani Maurice Sabri, Omar, Haitham S. E., Milad, Nader, Tourky, Mohamed Sabry, Elias, Abd Al-Kareem, Mostafa, Amir, Samir, Ahmed, Hussein, Amr Mahmoud, Shaaban, Hossam El-Din, Allah, Hazem Abd, and Salman, Mohamed Abdalla
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- 2022
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21. Total thyroidectomy with and without prophylactic central compartment neck dissection in early papillary thyroid cancer: A comparative study
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Omran, Hisham, Fadl, Ehab Mohammed Ali, and Sultan, Ahmed Abd El Aal
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- 2021
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22. Computational Identification of the Plausible Molecular Vaccine Candidates of Multidrug-Resistant Salmonella enterica
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Mishra, Rohit, primary, Chiang Tan, Yong, additional, Adel Ahmed Abd El-Aal, Amr, additional, and Lahiri, Chandrajit, additional
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- 2021
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23. Long-term effects of one-anastomosis gastric bypass on liver histopathology in NAFLD cases: a prospective study
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Salman, Mohamed Abdalla, Salman, Ahmed Abdallah, Omar, Haitham S. E., Abdelsalam, Ahmed, Mostafa, Mohamed Saber, Tourky, Mohamed, Sultan, Ahmed Abd El Aal, Elshafey, Mohammed Hassan, Abdelaty, Walid Rafat, Salem, Abdoh, Khaliel, Osama Osman, Elshafey, Hossam E., Atallah, Mohamed, Shaaban, Hossam El-Din, Yousef, Mohamed, and Nafea, Mohammed A.
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- 2021
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24. Impact of laparoscopic sleeve gastrectomy on fibrosis stage in patients with child-A NASH-related cirrhosis
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Salman, Mohamed Abdalla, Mikhail, Hani Maurice Sabri, Nafea, Mohammed A., Sultan, Ahmed Abd El Aal, Elshafey, Hossam E., Tourky, Mohamed, Awad, Abeer, Abouelregal, Tarek Elsayed, Ahmed, Reham Abdelghany, Ashoush, Omar, AbdelAal, Alhoussein Alsayed, Shaaban, Hossam El-Din, Atallah, Mohamed, Yousef, Mohamed, and Salman, Ahmed Abdallah
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- 2021
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25. Effect of Bariatric Surgery on the Cardiovascular System in Obese Cases with Pulmonary Hypertension
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Salman, Ahmed Abdallah, Salman, Mohamed Abdalla, Shaaban, Hossam El-Din, Abdelsalam, Ahmed, Tourky, Mohamed, Lotfy, Samah M., Omar, Haitham S. E., Mostafa, Mohamed Saber, Nafea, Mohammed A., Sultan, Ahmed Abd El Aal, Elshafey, Mohammed Hassan, Salem, Abdoh, Abdelaty, Walid Rafat, Khaliel, Osama Osman, and Mikhail, Hani Maurice Sabri
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- 2021
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26. Long-term Impact of Mini-Gastric Bypass on Inflammatory Cytokines in Cohort of Morbidly Obese Patients: a Prospective Study
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Salman, Mohamed Abdalla, Abdallah, Ahmed, Mikhail, Hani Maurice Sabri, Abdelsalam, Ahmed, Ibrahim, Ayman Helmy, Sultan, Ahmed Abd El Aal, El-ghobary, Mohamed, Ismail, Amro Abdelaziz Mohammed, Abouelregal, Tarek Elsayed, Omar, Mahmoud Gouda, AbdelAal, Alhoussein Alsayed, Shaaban, Hossam El-Din, GabAllah, Ghada M. K., Tourky, Mohamed, and Salman, Ahmed Abdallah
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- 2020
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27. Long-Term Changes in Leptin, Chemerin, and Ghrelin Levels Following Roux-en-Y Gastric Bypass and Laparoscopic Sleeve Gastrectomy
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Salman, Mohamed Abdalla, El-ghobary, Mohamed, Soliman, Ahmed, El Sherbiny, Mohammad, Abouelregal, Tarek Elsayed, Albitar, Amr, Abdallah, Ahmed, Mikhail, Hani Maurice Sabri, Nafea, Mohammed A, Sultan, Ahmed Abd El Aal, Elshafey, Hossam E, Shaaban, Hossam El-Din, Azzam, Ayman, GabAllah, Ghada M. K., and Salman, Ahmed Abdallah
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- 2020
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28. Pattern of Chronic Obstructive Pulmonary Disease Patients
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Sayed, Ahmed Abd El-Aal, primary, Ahmed, Mona Mansour, additional, and Salah, Haitham, additional
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- 2023
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29. Comparative Study Between Effect Of laparoscopic Sleeve Gasterecomy And Laparoscopic Mini Gastric Bypass On Cholesterol And Triglycerides In Obese Patients
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Elmohr, Mostafa Mahmoud Ismail, primary, Anany, Mohamed Ibrahim Al, additional, and Sultan, Ahmed Abd El Aal, additional
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- 2023
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30. Comparative Study between Karydakis Flap and rhomboidal flap in treatment of Sacrococcygeal pilonidal sinus
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Sultan, Ahmed Abd El Aal, primary, Semary, Mohammed Abdullah Mohamed Hassan, additional, and Mahmoued, Mohamed Hafez, additional
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- 2023
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31. The influence of carbonate textures and rock composition on durability cycles and geomechanical aspects of carbonate rocks
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Gamil M. S. Abdullah, Ahmed Abd El Aal, Ahmed E. Radwan, Talha Qadri, and Nevin Aly
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slake durability ,skeletal partials ,Earth and Planetary Sciences (miscellaneous) ,clay content ,mechanical properties ,Geotechnical Engineering and Engineering Geology ,carbonate rocks ,carbonate texture - Published
- 2023
32. Hyperuricemia and Smoking Correlation in Egyptian Young Adults with Coronary Artery Disease: Observational Study
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Ayman Ahmed El-Sheikh, Mohamed Ahmed Abd El-Aal, Seham Fahmy Badr, and Ali Youssef El-Sayed Youssef
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General Earth and Planetary Sciences ,cardiovascular diseases ,General Environmental Science - Abstract
Background: Young adults, especially those under 35, are often overlooked; however, previous studies have shown that coronary artery disease (CAD) incidence increases rapidly. Previous studies proved many risk factors for CAD, such as hyperlipidemia, hypertension, diabetes, and smoking. The present study ultimately aimed to figure out the correlation between Hyperuricemia (HUA) and smoking in CAD Patients under the age of 35. Methods: This observational study included 100 young adults (18–35 years of age) suspected of CAD. We used the Gensini Score system to ascertain coronary angiography outcome and CAD; based on the number of affected vessels, localization of the segment, and the stenosis grade. The Gensini score being > 0 indicated the presence of CAD. Results: In young adults under 35, there was a significant correlation between HUA and CAD. The interaction between HUA and smoking had a contrast for CAD that statistically shown the existence of CAD increased in patients who have hyperuricemia and non-smokers compared to smokers. Conclusions: By monitoring various parameters in young adults ≤ 35 years old. This study strengthens the correlation between:1) hyperuricemia and the occurrence of CAD, 2) Smoking and the CAD. Furthermore, there is a clear association between HUA and the occurrence of CAD in non-smokers.
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- 2021
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33. Improvement of Coronary Calcium Scores After Bariatric Surgery in People with Severe Obesity
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Amr Mahmoud Hussein, Abd Al-Kareem Elias, Amir Mostafa, Hossam El-Din Shaaban, Marwan Mansour Borham, Mohamed Abd Al-Fattah, Mohamed Shehata, Mohamed Hassan Elkaseer, Nader M. Milad, Ahmad Samir, Hazem Abd Allah Ali, Ahmed Abd El Aal Sultan, Mohamed Tourky, Mohamed Abdalla Salman, Mohamed Matter, Hani Maurice Sabri Mikhail, Hany A Balamoun, Nabil Ibrahim Fayad, Ahmed Abdallah Salman, and Haitham S. E. Omar
- Subjects
Blood Glucose ,medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Bariatric Surgery ,Gastrectomy ,Weight loss ,Diabetes mellitus ,Weight Loss ,Humans ,Medicine ,Prospective Studies ,Risk factor ,Prospective cohort study ,Nutrition and Dietetics ,Framingham Risk Score ,medicine.diagnostic_test ,business.industry ,medicine.disease ,Obesity ,Obesity, Morbid ,Coronary Calcium Score ,Surgery ,Treatment Outcome ,Calcium ,Laparoscopy ,medicine.symptom ,business ,Lipid profile - Abstract
Obesity is an independent risk factor for cardiovascular diseases. Coronary artery calcium (CAC) is a direct measure of coronary atherosclerosis. The study investigated the effect of bariatric surgery on CAC scores in people with severe obesity subjected to laparoscopic sleeve gastrectomy (LSG). This prospective study included 129 people with severe obesity in two groups; the LSG group (n=74) subjected to surgery and the diet group (n=55), managed by a diet regimen and lifestyle modification. Cardiovascular risk was assessed by Framingham risk score (FRS) and coronary calcium score (CCS) measured by computed tomography initially and after 3 years. The two groups had a comparable CAD risk before treatment according to FRS or CCS. After treatment, CCS improved significantly in the LSG group (p=0.008) but not in the diet group (p=0.149). There was no correlation between FRS and CCS (r=0.005, p=0.952). Treatment resulted in significant weight reduction and improved fasting blood glucose and lipid profile in the two groups. The change of weight, blood glucose, and HDL, and remission of diabetes mellitus (DM) were significantly higher in the LSG group compared to the diet group. LSG may reduce the risk of developing future cardiovascular comorbidities evidenced by reducing CAC scores. Significant weight reduction and improvement of cardiovascular risk factors may recommend LSG as a cardioprotective procedure in people with severe obesity.
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- 2021
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34. COMPARATIVE STUDY BETWEEN SINGLE LAYER VERSUS DOUBLE LAYER ANASTOMOTIC TECHNIQUE FOR SMALL INTESTINAL ANASTOMOSIS IN ADULTS
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Mohamed Kamal Soliman, Ahmed Abd El Aal Sultan, and Mohamed Ibrahim El-Anany
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medicine.medical_specialty ,medicine.diagnostic_test ,Ileus ,business.industry ,Cost effectiveness ,Stomach ,Physical examination ,Anastomosis ,medicine.disease ,Small intestine ,Surgery ,medicine.anatomical_structure ,Medicine ,Large intestine ,Esophagus ,business - Abstract
Background: Anastomosis of gastrointestinal tract more commonly used in most of abdominal operations including esophagus, stomach, small intestine, large intestine, and biliary system. However single layer versus double layer anastomotic technique is still a matter of discussion as regard safety and efficacy. Objective: To study efficacy and safety of single layer intestinal anastomosis against double layer anastomosis as regard leakage, cost effectiveness, and the time of the procedure. Patients and methods: This prospective randomized study included 40 patients requiring small intestinal resection and anastomosis at Al- Hussein University Hospital and Damanhur Medical National Institute (Al-Behira) during the period between May 2019 and October 2020. The cases of this study were subjected to full history taking, full clinical examination, along with routine laboratory and radiological investigations. The cases of this study were divided into two equal groups randomly; Group A was subjected to one-layer anastomosis, and group B underwent double layered anastomosis. All cases were subjected to the standard post-operative care. Oral intake and hospital stay were recorded. In addition, post-operative complications including leakage, ileus, and mortality were recorded. Results: Mean time of operation in the single layer intestinal anastomosis was statistically significantly shorter as compared with double layered intestinal anastomosis (28.29 ± 8.15 minutes and 35.19 ± 9.96 minutes) respectively. The early postoperative findings and late postoperative complications were comparable in both groups with no statistically significant difference. Conclusion: Single layer intestinal anastomosis was less time consuming, less utilization of packing material, in addition to equal efficacy and safety as compared with double layer intestinal anastomosis.
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- 2021
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35. An optimized RNN-LSTM approach for parkinson’s disease early detection using speech features
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Hadeel Ahmed Abd El Aal, Shereen A. Taie, and Nashwa El-Bendary
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Normalization (statistics) ,Control and Optimization ,Parkinson's disease ,Computer Networks and Communications ,business.industry ,Computer science ,Speech recognition ,Deep learning ,Early detection ,medicine.disease ,Recurrent neural network ,Hardware and Architecture ,Control and Systems Engineering ,Handwriting ,Clinical diagnosis ,Computer Science (miscellaneous) ,Benchmark (computing) ,medicine ,Artificial intelligence ,Electrical and Electronic Engineering ,business ,Instrumentation ,Information Systems - Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disorder disease right after Alzheimer's and the most common movement disorder for elderly people. It is characterized as a progressive loss of muscle control, which leads to trembling characterized by uncontrollable shaking, or (tremors) in different parts of the body. In recent years, deep learning (DL) models achieved significant progress in automatic speech recognition, however, limited studies addressed the problem of distinguishing people with PD for further clinical diagnosis. In this paper, an approach for the early detection of patients with PD using speech features was proposed, a recurrent neural network (RNN) with long short-term memory (LSTM) is applied with the batch normalization layer and adaptive moment estimation (ADAM) optimization algorithm used after the network hidden layers to improve the classification performance. The proposed approach is applied with 2 benchmark datasets of speech features for patients with PD and healthy control subjects. The proposed approach achieved an accuracy of 95.8% and MCC=92.04% for the testing dataset. In future work, we aim to increase the voice features that will be worked on and consider using handwriting kinematic features.
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- 2021
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36. Evaluation of the outcome of a proposed more physiological bypass surgery technique in morbid obesity: Long term 3 years follows up
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Abduh, Elbanna, Ahmed Abd El Aal, Sultan, Yasser, Helmy A, Ibrahim, Bakr, Mohamed Tag, El-Din, Mohamed Fathy, Labib, Osama Osman, Khalil, Mohammed Abd, Al-Fattah, Abd Elrahman, Safwat El Kady, Mohamed I, Henish, Hisham W, Anwer, Ahmed A, Mostafa, Ibrahim, Abdelghaffar, Ahmed Fathy, Elhossainy, Mahmoud Abd Alhady Abd, Al-Aziz, Mohamad, Baheeg, Ahmed M, Hegab, Tarek Zaghloul, Mohamed, Abdelhamid, Hifny, Ayman Helmy, Ibrahim, Abd-Elfattah, Kalmoush, Marwan Mansour, Borham, Alsayed Basiony, Moghazy, Mohamed Hassan, Elkaseer, and Mohamed Sobhy, Shaaban
- Subjects
Surgery ,General Medicine - Abstract
Obesity is a chronic condition that affects millions globally; consequently, bariatric surgery is the key to this serious issue. Bariatric procedures are rapidly expanding in number and methods to address the recognized problems. So, it would make a sense for surgeons and patients if there is a more physiological bypass surgery technique in Morbid obesity. This study aims to evaluate the outcome proposed technique.The present study is a retrospective analysis on 256 participants subjected to the proposed bypass procedure from December 1999 to January 2017, the participants were followed up for an interval of 3years.The findings of the present study revealed a significant Excess Weight Loss (EWL). In addition, patients experienced decreased calcium, iron, vitamin B12, Hemoglobin, zinc, and Prothrombin Concentration. However, three to six months after surgery, they experienced a significant improvement until they reached normal levels without any supplement by the end of 12,18 months, with a three-year follow-up.This proposed Bypass Operation aims to adequate digestions as well as selective absorption without inducing any vital deficit. Most of study's population showed no elements inadequacies, although few percentages emerged during the interval of maximal weight reduction, and it were transient and minimal. No minerals or vitamins were needed.
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- 2022
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37. Linking the sedimentary cyclicity with mechanical and physical properties of limestone and marl rocks, Dam Formation, Eastern Saudi Arabia: Implications for hydrocarbon exploration and reservoir development
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Ahmed Abd El Aal, Gamil M.S. Abdullah, Ahmed E. Radwan, Syed Haroon Ali, and Noureen Shoukat
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Geology ,Earth-Surface Processes - Published
- 2023
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38. Response to 'Letter to the Editor' in Regard to the Article: 'Improvement of Coronary Calcium Scores After Bariatric Surgery in People with Severe Obesity'
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Ahmed Abdallah Salman, Mohamed Matter, Nabil Ibrahim Fayad, Mohamed S. Abd Elaziz Shehata, Mohamed Abd Al-Fattah, Mohamed Hassan Elkaseer, Marwan Mansour Borham, Hany A. Balamoun, Ahmed Abd El Aal Sultan, Hani Maurice Sabri Mikhail, Haitham S. E. Omar, Nader Milad, Mohamed Sabry Tourky, Abd Al-Kareem Elias, Amir Mostafa, Ahmed Samir, Amr Mahmoud Hussein, Hossam El-Din Shaaban, Hazem Abd Allah, and Mohamed Abdalla Salman
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Nutrition and Dietetics ,Endocrinology, Diabetes and Metabolism ,Surgery - Published
- 2022
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39. Advances on concrete strength properties after adding polypropylene fibers from health personal protective equipment (PPE) of COVID-19: Implication on waste management and sustainable environment
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Ahmed Abd El Aal, Gamil M.S. Abdullah, S.M. Talha Qadri, Abotalib Z. Abotalib, and Abdullah Othman
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Geophysics ,Geochemistry and Petrology - Abstract
Using Health personal protective equipment (PPE) such as face masks, safety foot shoes and protective suits has expanded dramatically due to COVID-19 pandemic leading to a widespread distribution of the PPE, particularly the face masks, in the environments including streets, dump sites, seashores and other risky locations. The environmental degradation of polypropylene, the essential plastic component in single-use face masks (SUM), takes between 20 and 30 years and thus it is essential to develop experimental approaches to recycle the polypropylene or to reuse it in different ways. This paper explores the integration of SUM into concrete structures to improve its mechanical properties. We first to cut the inner nose wire and ear loops, then distribute the PPE material among five different mixed styles. The PPE were applied by volume at 0%, 1%, 1.5%, 2.0%, and 2.5%, with tests focusing on UCS, STS, FS, and PV to determine the concrete's overall consistency and assess the improvement in its mechanical properties. The results showed that adding PPE improves the strength properties and general performance of the concrete specimens. The pattern of rising intensity started to fade after 2%. The findings demonstrated that adding PPE fibers enhanced the UCS by 9.4% at the optimum 2% PPE. The PPE fibers, on the other side, are crucial in calculating the STS and FS of the reinforcement concrete.
- Published
- 2022
40. EFFECT OF COLLOID VS CRYSTALLOID PRELOAD ON HEMODYNAMIC STABILITY IN ELDERLY PATIENTS UNDERGOING LOWER LIMB ORTHOPEDIC SURGERY UNDER SPINAL ANESTHESIA
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Ahmed Said, Hassanin Abd Al-Karem, Ahmed M. El-Garhy, and Ahmed Abd El Aal Sultan
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medicine.medical_specialty ,business.industry ,Hemodynamics ,Hydroxyethyl starch ,Colloid ,Preload ,Blood pressure ,Anesthesia ,Orthopedic surgery ,Heart rate ,medicine ,Ephedrine ,business ,medicine.drug - Abstract
Background: Hypotension is commonly occurred with Spinal anesthesia. Colloids and Crystalloids are used preoperatively to prevent hypotension. Objective: To examine the effect of fluid (crystalloid vs. colloid) preloading on hemodynamic stability in old patients planned for lower limb orthopedic operations with spinal anesthesia. Patients and methods: Eighty patients undergoing orthopedic surgery under spinal anesthesia were included in this work. Their age ranged between 60-80 years. Patients were allocated randomly to either Crystalloid (Ringer solution RS group) or Colloid (hydroxyethyl starch solution HES group). Intravenous preload of 10 mL/kg of either lactated Ringer's solution in the RS group or hydroxyethyl starch solution (6% HES 130/0.4; Voluven) in the HES group was infused over 20 min before spinal anesthesia.. Hemodynamic parameters were recorded, and all results were compared. Results: More than 20% drop in systolic blood pressure occurred in 45% patients in the crystalloid group compared to 15% patients in the colloid group. This difference was significant statistically (p < 0.01). Regarding requirement of ephedrine to treat hypotension, (45% of patients in crystalloid group required Ephedrine compared to 15% patients in colloid group). This was also statistically significant (p < 0.01). Conclusion: Colloid solution was better than crystalloid solution in controlling blood pressure, ephedrine requirements and heart rate changes.
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- 2021
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41. Lichtenstein versus transabdominal preperitoneal (TAPP) inguinal hernia repair for unilateral non recurrent hernia: A multicenter short term randomized comparative study of clinical outcomes
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Ahmed Abd El Aal, Sultan, Hossam Attia, Abo Elazm, and Hisham, Omran
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Surgery ,General Medicine - Abstract
The repair of inguinal hernia is still one of the most prevalent surgical procedures done worldwide. Among all repair techniques, open Lichtenstein repair is the most globally conducted. In the past few decades, laparoscopic technique for inguinal hernia repair has increased technical demand.The current work is a short-term study to make a comparison between open Lichtenstein repair of inguinal hernia as well as laparoscopicThe present prospective randomized study recruited 100 male subjects from General Surgery Department of Al-Azhar University Hospitals and Ain Shams university hospitals suffering from oblique inguinal hernia (unilateral non recurrent hernia) with an age above 18 years and good overall health, who were randomized into two groups: Group A: 49 cases were subjected to laparoscopicThis study detected less post-operative pain day 0, day 1, day 7 and 1 month postoperatively. There was no significant difference at 6 months post-operatively.Finally, we concluded that TAPP repair for inguinal hernia (unilateral non recurrent hernia) safer with less early post-operative pain. Also, it has fewer complications, with a significantly longer operative time.
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- 2022
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42. Incidence and Risk Factors of Thyroid Malignancy in Patients with Toxic Nodular Goiter
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Mohamed, Tarek Zaghloul, primary, Sultan, Ahmed Abd El Aal, additional, Tag El-Din, Mohamed, additional, Mostafa, Ahmed A. Elfattah, additional, Nafea, Mohammed A., additional, Kalmoush, Abd-Elfattah, additional, Nassar, Mohammed Shaaban, additional, Abdalgaleel, Mohamad Adel, additional, Hegab, Ahmed M., additional, Ibrahim, Ayman Helmy, additional, and Baheeg, Mohamad, additional
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- 2022
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43. Improvement of Systemic Adipokines and Adipokine Hepatic Gene Expression After Laparoscopic Sleeve Gastrectomy
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Ahmed Abdallah Salman, Mohamed Abdalla Salman, Hani Maurice Sabri Mikhail, Alhoussein Alsayed AbdelAal, Tarek Elsayed Abouelregal, Ahmed Abdelsalam, Mohamed El-ghobary, Amro Abdelaziz Mohammed Ismail, Ghada M K GabAllah, Mohamed Tourky, Hossam El-Din Shaaban, and Ahmed Abd El Aal Sultan
- Subjects
Laparoscopic sleeve gastrectomy ,medicine.medical_specialty ,Nutrition and Dietetics ,business.industry ,Adipokine ,Inflammation ,Gastroenterology ,Proinflammatory cytokine ,Medical–Surgical Nursing ,Internal medicine ,Gene expression ,Medicine ,Surgery ,medicine.symptom ,business - Abstract
Introduction and Aim: Obesity is characterized by low-grade inflammation, which is depicted by an increase of proinflammatory cytokines and a decrease of anti-inflammatory cytokines. This study was...
- Published
- 2020
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44. Physico-mechanical properties of lime–silica fume pastes modified with nano-metakaolin
- Author
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Khalifa Al-Jabri, H. Shoukry, and Ahmed Abd El Aal
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Materials science ,Silica fume ,Chemical engineering ,Nano ,engineering ,Building and Construction ,engineering.material ,Metakaolin ,Civil and Structural Engineering ,Lime - Abstract
The improvement in the physico-mechanical properties of lime–silica fume (SF) pastes through the incorporation of nano-metakaolin (NMK) was investigated. Lime–SF paste (1 : 1 by weight) was prepared as a reference binder. To examine the influence of NMK on strength development, SF was replaced with 2–10 wt% NMK. The compressive strength, capillary water absorption and pore structure of the designed mixes were determined after 3, 7 and 28 d of curing. X-ray diffraction analysis and differential scanning calorimetry were used to study the phase composition and scanning electron microscopy (SEM) was used for microstructural investigations. The lime–SF binder modified with 6% NMK exhibited the best mechanical performance. Pore structure analysis confirmed that NMK provided significant refinement in the pore structure of the blended pastes and SEM micrographs revealed noticeable microstructural improvements. The capillary water absorption coefficient decreased considerably with an increase in NMK content up to 6% compared with the reference mixture. Use of the developed lime–SF–NMK paste is recommended as a promising innovative binder for specific cement applications such as plastering and renovation of buildings.
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- 2020
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45. Improvement of Obstructive Sleep Apnea–Hypopnea Syndrome in Morbidly Obese Patients Undergoing Laparoscopic Sleeve Gastrectomy: Prospective Study
- Author
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Ahmed Abdallah Salman, Ahmed Ghobashy, Basem Othman, Ahmed Abdallah, Ahmed S. Abdulsamad, Hesham Elkassar, Samah M. Lotfy, Mohamed Abdalla Salman, Mahmoud Gouda Omar, Ahmed Abd El Aal Sultan, and Mohammed A Nafea
- Subjects
Sleeve gastrectomy ,medicine.medical_specialty ,Laparoscopic sleeve gastrectomy ,Nutrition and Dietetics ,business.industry ,medicine.medical_treatment ,Complex disease ,Morbidly obese ,medicine.disease ,Obesity ,respiratory tract diseases ,Surgery ,Obstructive sleep apnea ,Medical–Surgical Nursing ,medicine ,business ,Prospective cohort study ,Hypopnea - Abstract
Introduction: Obesity is a complex disease with multiple aspects that is associated with different health comorbidities including obstructive sleep apnea (OSA). The aim of this study is to evaluate...
- Published
- 2020
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46. Environmental Analysis of Land Use and Land Change of Najran City: GIS and Remote Sensing
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Mostafa Kamel, Ahmed Abd El Aal, and Saleh H. Alyami
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Multidisciplinary ,Land use ,010102 general mathematics ,Flooding (psychology) ,Land cover ,01 natural sciences ,Normalized Difference Vegetation Index ,BREEAM ,Land reclamation ,Agricultural land ,Environmental science ,Environmental impact assessment ,0101 mathematics ,Remote sensing - Abstract
This study critically analyzes changes in land use and land cover by means of multi-temporal remote sensing of Najran City in Saudi Arabia between 1975 and 2019. A number of remotely sensed data were employed to create multi-maps using: (a) the normalized difference vegetation index; (b) head-up digitizing; and (c) supervised classification of Landsat images using field observation and accuracy assessment, including field verification and Google Earth Professional. Criteria from a well-known technique of environmental assessment, the Building Research Establishment Environmental Assessment Method (BREEAM), were used to critically analyze land use and evaluate levels of sustainability, with particular focus on ecology. Therefore, land around Najran can be characterized as follows: (1) Najran valley; (2) agricultural land; (3) built-up areas; (4) reclaimed land; (5) basement rock; and (6) desert. The results indicate that agricultural land grew from an average of 39.81 km2 (1.07%) in 1975 to 218.51 km2 (5.9%) in 2005, although this was followed by a marked decline between 2005 and 2019. Urban land increased from 1.12 km2 (0.031%) in 1975 to 154.35 km2 (4.13%) in 2019. Furthermore, there was approximately 1289.47 km2 of reclaimed land in 1975 (i.e., 34.64% of the total area study area) but approximately 1151.1 km2 (30.86%) in 2019. There was a small amount of desert (i.e., sand dunes) in the study area, and no change was recorded in the basement rock. This study analyzed these land changes, likening them to BREEAM criteria of ecology and land use. A number of unsustainable practices were potentially resulting in serious land contamination and pollution of both surface and ground water, as well as an increased risk of flooding.
- Published
- 2020
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47. Comparative study between volume-controlled ventilation and pressure-controlled ventilation in prevention of postoperative pulmonary atelectasis in morbidly obese patients undergoing laparoscopic gastric sleeve surgery
- Author
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Hoda Omar Mahmoud, Tarek Shabana, Wael Ahmed Abd el Aal, Mona Ahmed Mohamed Abdelmotaleb, and Ramy Mohammed Hassan
- Subjects
medicine.medical_specialty ,VCV ,medicine.medical_treatment ,Atelectasis ,complex mixtures ,Hypoxemia ,lcsh:RD78.3-87.3 ,medicine ,Lung volumes ,Mechanical ventilation ,Lung ,business.industry ,lcsh:Medical emergencies. Critical care. Intensive care. First aid ,General Medicine ,Oxygenation ,lcsh:RC86-88.9 ,medicine.disease ,Surgery ,respiratory tract diseases ,medicine.anatomical_structure ,lcsh:Anesthesiology ,Breathing ,Arterial blood ,medicine.symptom ,business ,PCV - Abstract
Background Atelectasis can result during general anesthesia from mechanical ventilation and decrease in lung volume particularly in morbidly obese patients undergoing abdominal laparoscopic sleeve surgery, which may result in the development of postoperative pulmonary complications (PPCs), including hypoxemia and pneumonia, with an increased risk of postoperative morbidity and mortality. Objective To compare between volume-controlled ventilation (VCV) and pressure-controlled ventilation (PCV) in prevention of postoperative pulmonary atelectasis in morbidly obese patients undergoing laparoscopic gastric sleeve surgery. Methods This is a randomized prospective comparative clinical study with a total of 52 morbidly obese patients who were randomly divided into 2 groups; 26 patients in group (V) for VCV and 26 in group (P) for PCV arterial blood samples were obtained, and PaCO2, PaO2, and SaO2 were obtained and recorded. ABG analyses were also obtained 30 min, 12 h, and 24 h post-extubation, and PaCO2, PaO2, and SaO2 were obtained and recorded. Results The results of this study revealed no significant differences between PCV and VCV as regards the incidence of postoperative lung atelectasis immediately postoperative (69.2% with VCV vs 61.5% with PCV, p = 0.368), 12 h postoperative (61.5% with VCV vs 53.8% with PCV, p = 0.282), and 24 h postoperative (53.8% with VCV vs 46.2% with PCV, p = 0.325). There were also no significant differences between VCV and PCV as regards baseline, intra-, and post-operative PaCO2 levels as well as baseline and postoperative SaO2 and PaO2 values. However, PCV showed better intraoperative oxygenation compared to VCV. SaO2 was 96.32% ± 1.85 and 97.25% ± 1.37 in VCV and PCV groups respectively (p = 0.027) while PaO2 was 212.75 mmHg ± 20.13 and 225.8 mmHg ± 18.69 in VCV and PCV groups respectively (p = 0.011). Conclusion Despite a slight improvement in intraoperative oxygenation parameters (PO2, SaO2) with PCV than VCV, there is no significant difference between VCV and PCV in the prevention of postoperative pulmonary atelectasis; moreover, there is no difference in postoperative oxygenation parameters in morbidly obese patients who undergo laparoscopic sleeve surgery.
- Published
- 2020
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48. Long-term effects of one-anastomosis gastric bypass on liver histopathology in NAFLD cases: a prospective study
- Author
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Walid Rafat Abdelaty, Mohamed Atallah, Mohammed Hassan Elshafey, Ahmed Abdallah Salman, Haitham S. E. Omar, Mohamed Yousef, Mohamed Saber Mostafa, Mohamed Abdalla Salman, Mohamed Tourky, Ahmed Abdelsalam, Abdoh Salem, Osama Osman Khaliel, Mohammed A Nafea, Hossam El-Din Shaaban, Ahmed Abd El Aal Sultan, and Hossam E Elshafey
- Subjects
Adult ,Liver Cirrhosis ,Male ,medicine.medical_specialty ,Time Factors ,Gastric Bypass ,Anastomosis ,Gastroenterology ,03 medical and health sciences ,0302 clinical medicine ,Non-alcoholic Fatty Liver Disease ,Risk Factors ,Weight loss ,Internal medicine ,Weight Loss ,Nonalcoholic fatty liver disease ,medicine ,Humans ,Aspartate Aminotransferases ,Prospective Studies ,Prospective cohort study ,Pathological ,business.industry ,Liver cell ,Anastomosis, Surgical ,Alanine Transaminase ,Hepatology ,medicine.disease ,digestive system diseases ,Treatment Outcome ,Liver ,030220 oncology & carcinogenesis ,Female ,030211 gastroenterology & hepatology ,Surgery ,medicine.symptom ,business ,Abdominal surgery - Abstract
Weight reduction can effectively improve nonalcoholic fatty liver disease (NAFLD), which is a constant companion of severe obesity. This study aimed to determine the effect of one-anastomosis gastric bypass (OAGB) on pathological liver changes in severely obese cases with NAFLD.The present prospective research comprised 67 subjects with morbid obesity scheduled for OAGB during the period from February 2015 to August 2018. Clinical, biological, and histologic data were evaluated pre and 15 months postoperatively.Fifteen months after surgery, a considerable reduction was noted in the grades of fat deposition, liver cell ballooning, and lobular inflammatory changes, in addition to the total NAS score. Fifteen months after surgery, nonalcoholic steatohepatitis (NASH) disappeared in 42% of the patients. A significant regression of fibrosis stage occurred after surgery in 79.1% of patients (p0.001). After surgery, patients had substantial reductions in aspartate aminotransferase, alanine aminotransferase, γ-glutamyltransferase, HbA1c, total cholesterol, and Low-density lipoprotein (p0.001, for all comparisons). Diabetes mellitus, hypertension, and dyslipidemia resolved in 54%, 59%, and 69% of the patients, respectively.OAGB resolved NASH from nearly 42% of patients and reduced the histological features of NAFLD 15 months after surgery. Bariatric procedures might be adopted as a therapeutic modality in severely obese cases with NAFLD after the failure of lifestyle modifications.
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- 2020
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49. Enhancement of the Geotechnical Properties of Soils Using Marble and Lime Powders, Guelma City, Algeria
- Author
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Ahmed Abd El Aal and Ammar Rouaiguia
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Soil test ,0211 other engineering and technologies ,Soil Science ,Geology ,02 engineering and technology ,engineering.material ,Atterberg limits ,010502 geochemistry & geophysics ,Geotechnical Engineering and Engineering Geology ,01 natural sciences ,Shear strength (soil) ,Architecture ,Soil stabilization ,Soil water ,engineering ,Cohesion (geology) ,Environmental science ,Geotechnical engineering ,Water content ,021101 geological & geomatics engineering ,0105 earth and related environmental sciences ,Lime - Abstract
As quality soils become scarce and their location is more difficult and expensive, it becomes increasingly necessary to improve soil quality through soil stabilization. The benefits of energy saving and resource conservation, effective recycling of all solid wastes (fly ash, slag, lime, marble dust, etc.) has become a global concern that requires research and development. This article presents the results of a laboratory tests to investigate the effects of marble powder and lime on compaction characteristics, Atterberg limits, shear strength parameters, and unconfined compression test of two Algerian soils. Marble powder and lime are added in varying percentages (2%, 4%, and 6% by weight) to the soil samples. Test results reveal that the liquid limit and plasticity index decrease, whereas the plastic limit increases with the addition of lime and marble powder for soil A and soil B, in which the decrease is more significant with soil A than soil B. The unconfined compressive strength increased with increasing curing time and percentages of lime and marble powder for the two soils. The highest unconfined compressive strength was achieved at 6% marble powder for soil B after 28 days. The addition of marble powder for both soils decreased the optimum moisture content and increased the corresponding maximum dry unit weight. However with lime addition, both soils show decrease in the optimum moisture content and in the corresponding maximum dry unit weight. The shear strength parameters increased for both soils with increase of lime percentages. Whereas for the addition of marble powder, there is an increase of friction angle and decrease of cohesion for soil A. There is considerable change for soil B with marble powder, a decrease in friction angle and an increase in cohesion. The results show that marble powder could be used as a stabilizer for soils with high clay content and known mineralogy composition. In addition, it is very important to get rid of its negative effect on environment and to obtain economical benefit from it.
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- 2020
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50. Effect of weight loss induced by laparoscopic sleeve gastrectomy on liver histology and serum adipokine levels
- Author
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Ahmed Abdallah Salman, Ahmed Abdelsalam, Reham Abdelghany Ahmed, Mohamed Abdallah Salman, Hossam El-Din Shaaban, Hesham Elkassar, Sayed M Seif El Nasr, Mahmoud Gouda Omar, Ahmed Abd El Aal Sultan, Ahmed Abdallah, Ahmed F.A. Youssef, Mohamed Atallah, Hani Maurice Sabri Mikhail, Ghada M K GabAllah, and Mohamed Tourky
- Subjects
Adult ,Male ,medicine.medical_specialty ,Sleeve gastrectomy ,medicine.medical_treatment ,Bariatric Surgery ,Adipokine ,Gastroenterology ,Endoscopy, Gastrointestinal ,03 medical and health sciences ,0302 clinical medicine ,Adipokines ,Gastrectomy ,Non-alcoholic Fatty Liver Disease ,Internal medicine ,Weight Loss ,medicine ,Humans ,Glucose homeostasis ,Aspartate Aminotransferases ,Prospective Studies ,Inflammation ,Hepatology ,Adiponectin ,medicine.diagnostic_test ,business.industry ,Fatty liver ,Alanine Transaminase ,Hypertrophy ,Middle Aged ,medicine.disease ,Liver ,030220 oncology & carcinogenesis ,Hepatocytes ,Female ,Laparoscopy ,030211 gastroenterology & hepatology ,Resistin ,Steatohepatitis ,Liver function tests ,business - Abstract
BACKGROUND & AIM Bariatric surgery is a valid treatment option for persons with non-alcoholic fatty liver disease. This study prospectively examined the impact of laparoscopic sleeve gastrectomy (LSG) on liver histopathology, and blood levels of adiponectin, leptin, resistin, and pre-B cell enhancing factor/Nampt/visfatin. PATIENTS & METHODS In 81 patients with non-alcoholic fatty liver disease who underwent LSG, paired liver biopsies and blood specimens were obtained before and 18 months after LSG. Differences between preoperative and 18 months postoperative data were tested by paired Student's t-test or Wilcoxon rank test as appropriate. RESULTS At follow up, there was a significant improvement in biochemical markers for glucose homeostasis, including fasting glucose, HbA1c, insulin levels, and homeostatic model assessment index. Postoperative liver function tests, namely serum alanine aminotransferase, aspartate aminotransferase, and gamma-glutamyl transpeptidase level, showed a significant improvement compared to before weight loss. The number of patients who had definite, borderline, or no non-alcoholic steatohepatitis was 43 (53%), 27 (33%), and 11 (14%), respectively, at baseline, and 9 (11%), 32 (40%), and 40 (49%) at 18-month post-surgery follow up. A significant reduction in steatosis, liver fibrosis, lobular inflammation, and hepatocyte ballooning was observed in the postoperative biopsies (P
- Published
- 2020
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