Search

Recently, efficient decontamination of water and wastewater have attracted global attention due to the deficiency in the world’s water sources. Herein, activated carbon (AC) derived from willow catkins (WCs) was successfully synthesized using chemical modification techniques and then loaded with different weight percentages of nickel ferrite nanocomposites (10, 25, 45, and 65 wt.%) via a one-step hydrothermal method. The morphology, chemical structure, and surface composition of the nickel ferrite supported on AC (NFAC) were analyzed by XRD, TEM, SEM, EDX, and FTIR spectroscopy. Textural properties (surface area) of the nanocomposites (NC) were investigated by using Brunauer–Emmett–Teller (BET) analysis. The prepared nanocomposites were tested on different dyes to form a system for water remediation and make this photocatalyst convenient to recycle. The photodegradation of rhodamine B dye was investigated by adjusting a variety of factors such as the amount of nickel in nanocomposites, the weight of photocatalyst, reaction time, and photocatalyst reusability. The 45NFAC photocatalyst exhibits excellent degradation efficiency toward rhodamine B dye, reaching 99.7% in 90 min under a simulated source of sunlight. To summarize, NFAC nanocomposites are potential photocatalysts for water environmental remediation because they are effective, reliable, and reusable.

Nanosphere and nanotube titanates (TNT) amalgamated with different graphene oxide (GO) ratios synthesized by one pot microwave irradiation route have presented excellent potential towards hydrogen production photoelectrochemically under solar irradiation. The hybrid nanospherical array of the 50TNT-50GO photocatalyst showed a current density equal 9.2 mA cm-2 at a bias of 0.20 V vs. RHE exceeding those of the nanotubes 30TNT-70GO (4.0 mA cm-2 at 0.38 V) and 10TNT-90GO (3.7 mA cm-2 at 0.4 V). The former electrode also exhibits small Tafel slope value (40 mV dec-1), decreased particle diameter (7 nm), decreased band gap (2.6 eV) and high rate of charges transfer. The hybrid structure elucidation carried out using TEM-SAED, XRD, N2 adsorption, UV-Vis, FTIR and PL techniques approved the interfacial interaction between TNT and GO(RGO) networks that was responsible for the high quantum yield, delay of charges recombination beside the increase in the pore volume.

The storey begins with tracheoesophageal fistula (TEF), or an abnormal connection between the trachea and the oesophagus. This research was conducted to learn about the outcomes of treating TEF (EOS) in newborns and to see whether various neonatal demographic and clinical data correlate. Methods: A total of 10 neonates identified with TEF utilising chest X-ray obtained after the gastrographin had been poured via the implanted Ryle's tube was included in the research. The researchers studied 16 male newborns and 14 female newborns. To calculate the results, it was determined that the gender ratio among survivors was greater and the birth weight was higher in survivors than non-survivors. GA was somewhat longer in survivors. Compared to survivors, non-survivors were much more likely to have linked congenital abnormalities. However, although the incidence of related congenital cardiac anomalies and pneumonia was non-significantly greater among non-survivors, it was substantially higher among survivors. Therefore, the diagnosis of oesophageal atresia is most frequently made within the first 24 hours of birth, although it may also be diagnosed during pregnancy, and delayed diagnosis until the newborn begins to feed and develop aspiration pneumonitis does not exist today. Early postoperative problems include anastomotic leakage or stricture occur in around 56.7% of patients. Consequences of pre-exciting other congenital abnormalities or development of chest infection or recurrent pneumonia cause most of the deaths.

In the current study, CoFe

The present work aims to recognize the geometry and buildmodeling of the Oligo-Miocene unconventional igneous intrusions ofthe fracture reservoir in Rudeis-Sidri field, Gulf of Suez, Egypt. Thesereservoirs, much more difficult to predict, evaluate and to buildmodeling than the conventional reservoirs. Seismic attribute is aquantity extracted or derived from the seismic data that analyzed inorder to enhance information that might be subtler in a traditionalseismic image, leading to a better understanding and interpretation ofthe data. Two attributes (Local Structural Dip), through detecting thescattered dip from the seismic events, (Sweetness), through recognizingthe variations of reflectors, that have potential to predict possiblefracturing and absorption effects, to recognize the geometry to getcriteria to build the modeling process to differentiate betweensedimentary and basalt intrusions. As a result, the combination andintegration of the two types of seismic attributes, the available well logdata analysis as control points to establish building 3-D models, whichhelp to differentiate between the sedimentary and non-sedimentaryrocks, to delineate the geometry, distribution, and to follow the new oilpotentially at Rudeis-Sidri field

Aim: The purpose of study was to evaluate wear and surface roughness of ZLS compared to lithium disilicate glass ceramic before and after simulated mastication. Materials and Methods: Thirty samples were divided according to material of construction into three groups (n = 10). Group (1): E Max-CAD, Group (2): Celtra duo ZLS, Group (3): Celtra press ZLS. The sectioned samples of E-max CAD blocks were polished and crystalized. The sectioned samples of Celtra Duo ZLS blocks were glazed and fired. The Ingots of celtra press were lab pressed, sectioned, glazed and power fired. The two-body wear testing was done using chewing simulator. Each ceramic sample was weighed and evaluated for surface roughness before and after wear simulation test using electronic analytical balance and the optical profilometry, respectively. Results: IPS E-max CAD revealed highest amount of weight loss with no statistically significant difference between groups. The change in weight for each group was non-significant . The roughness mean value for E-max CAD was significantly decreased and recorded the lowest roughness change. No significant difference in the roughness mean value between the two celtra materials. The roughness change for either Celtra Duo or Celtra Press groups was non-significantly increased. Conclusions: ZLS Celtra ceramics had insignificant less wear and significant higher surface roughness with enamel antagonist compared to E-max CAD. Although wear and roughness were affected by the surface finishing of glass ceramics, the construction method of ZLS restorative materials had no significant impact on both.

Ten genotypes of bread wheat were crossed in a line x tester mating design. The twenty-one F1's and their parents (seven lines and three testers) were estimated under three levels of nitrogen fertilizer; low (25 kg N/fed), mid (50 kg N/fed) and normal (75 kg N/fed) in three experiments. Each experiments in a randomized complete block design with three replications at the Experimental Farm, Faculty of Agriculture, Menoufia University, Shebin El-Kom, Egypt during 2019/2020. The results cleared that nitrogen fertilizer levels mean squares were significant for all studied traits. A significant difference was found among lines, testers, line x testers and their interaction with nitrogen levels for all studied traits. Analysis of genetic revealed that GCA and SCA variances were significant for all studied traits under different levels of nitrogen fertilizer, indicating the importance of both additive and non-additive components in the inheritance of these traits. However, the hybrids L1 x T1, L2 x T1, L2 x T3, L3 x T2, L4 x T2, L5 x T2, L6 x T2, L7 x T1and L7 x T3were excellent harmonious combiners for specific combining ability effects for grain yield per plant and most of its components under different nitrogen fertilizer levels. The parental lines 1, 4, 6 and 7 proved to have better general combiners for grain yield per plant and most of its components under different levels of nitrogen. Therefore, these genotypes must be taken care of when breeding to tolerate low levels of nitrogen fertilization.

Background There is increasing interest and patient demand for minimally invasive cardiac surgery. Aim We aimed to assess the safety and potential indications of minimally invasive coronary artery bypass grafting (CABG) and possibilities of such techniques and debating it will become the standard procedure. Patients and methods From February 2015 till February 2020, 83 cases underwent CABG via right submammary incision, and of them, 18 cases underwent hybrid technique. Results The procedure was successfully performed in all. Conversion rate to full sternotomy was 0%. Hospital mortality was seen in two (2.4%) patients. Re-exploration for bleeding was done in 0 (0%) patients. Superficial wound infection was seen in five (6%) patients, and deep wound infection was seen in one (1.2%) patient. Graft failure occurred in one patient who needed redo-operation after 6 months postoperatively, and one patient needed to lengthen the left internal mammary artery with composite vein graft. Conclusions Minimally invasive direct coronary artery bypass is a safe procedure for patients requiring left internal mammary artery to left anterior descending, as for hybrid CABG, clear indications are still to be revised.

Objectives: To investigate the color stability and translucency of zirconia-reinforced lithium silicate glass-ceramic (ZLS) prepared with different surface finishing procedures after thermo-mechanical aging and immersion in different beverages. Sixty samples were fabricated from heat-pressed and milled ZLS. All samples were finished and divided into three groups (n=20), according to the finishing methods; (CD) polished and fired, (CD) glazed and fired, and (CP) glazed and power fired. The specimens were subjected to aging using chewing simulator integrated with thermocycling protocol. Then, each group was divided into 4 equal subgroups (n = 5) according to exposure to immersion medium (coffee, tea, Coca-Cola and distilled water). Color and translucency parameter (TP) were measured according to CIELAB color space using spectrophotometer at baseline and after subjecting the specimens to aging and different staining solutions. Changes in color (ΔE) and TP (ΔTP) were calculated. The data was analyzed using the analysis of variance (ANOVA) and Tukey’s post hoc test (p < 0.05). Aging and staining significantly affected the baseline color and decreased TP of all specimens. Generally, regarding the tested groups, CD polished showed the highest ΔE and ΔTP (p

The essential treatment for colon malignant growth is medical procedure. The piece of the huge inside with malignancy is evacuated, alongside encompassing lymph hubs. Malignancy found in the climbing colon and hepatic flexure, the correct side is evacuated by right hemicolectomy or expanded right hemicolectomy. The idea of complete mesorectal extraction (TME) as proposed by Heald et al. in the mid 80's brought about altogether better oncological results in rectal malignant growth medical procedure. TME likewise raised the issue of better results in colon malignant growth medical procedure, which, up to that point, was not normalized and the reports in the writing showed a lot of heterogeneity and high repeat rates. In 2009 and in corresponding to the TME idea, came the primary report and portrayal of the total mesocolic extraction (CME) with focal vascular ligation (CVL), with very noteworthy oncological results and a general 5-year endurance coming to up to 70% for stage III colon malignant growth patients. They additionally demonstrated that it is a sheltered and plausible strategy which bears at any rate a similar dreariness and mortality as the "purported" standard technique.CME with CVL comprises of two primary segments. Right off the bat, it focuses on the safeguarding of flawless fasciae of the mesocolon between which pertinent lymph hubs are contained. Also, the vessels that gracefully the tumor colon site must be ligated at their starting point, to be specific at the degree of the unrivaled mesenteric vein for right sided injuries, thusly the nerves of the celiac plexus, which run along the predominant mesenteric supply route, and the hypogastric plexus, which runs on the aorta, individually, are secured, and the evacuation of the total mesocolon and the greatest lymph hub yield is accomplished.

A field experiment was conducted during 2017/2018 to assess the effects of Argel (Solenostemmaargel, Del. Hayne) and Nitrogen fertilizer on the performance of two Sunflower Hybrid cultivars, with the objectives to exploit an easy, economic, and accessible organic fertilizer, the Argel in the phase of the continuous increasing prices of chemical fertilizers.. This experiment was laid out on spilt-split-plot experiment in Randomized Complete Block Design (RCBD) with four replications. Observations were taken on some agronomic traits (Plant height (m), Leaf area (LA), leaf Number (NL), Leaf Area Index (LAI) and Mean Seed Weight). The results revealed that the application of Argel and Nitrogen fertilizer have significantly increased the leaf Area (F= 7.22, P < 0.001), Plant Height (F=2.68, P < 0.2001), Leaf Number (F= 3.90, P < 0.0024), Leaf Area Index (F= 3.83, P < 0.0026) and Mean Seed Weight of both Serena and Opera cultivars respectively compared to the control. However, the different treatments of Argel and Nitrogen reflected variable degree of increase for the studied parameters. The study concludes that Argel is very promising, therefore a further study with different levels of Argel including other plant parameters is recommended.

Safety at work is not just a priority, but a fundamental value, shared by employees, contractors and local stakeholders. People are both as the starting point and the final goal of all its actions. This is why we work hard to ensure the safety of each of us and those around us, in order to eliminate all accidents. we are all committed to spreading and strengthening a culture of safety among all our people, employees or contractors, as an essential part of our work. Companies develop campaigns and projects to promote a safe and healthy behavior in any workplace and, more in general, in everyday life. Virtuous tools and means of communication include workshops, theatre events and round table discussions, as well as video clips sharing what we learned from past safety hazards and the HSE Safety Golden Rules, our key safety rules. The continuous involvement of top management, contractors, representatives from local communities, or external guests, increases its commitment to safety. This paper presenting one of the effective program which is designed and launched by an Oil & Gas Company so to allow all HSE leaders to self-evaluate their level of commitment towards HSE-related aspects and plan a number of important activities that would ultimately increase one's level of HSE commitment and enhance the safety culture through a Web Portal program called " My Personal HSE Commitment". The portal provides the possibility to develop an action plan related to specific corrective and/or proactive actions/tasks that the user wishes to keep track of. The most important part is also, The Web tool is furthermore capable of generating a personal HSE Commitment Poster that the user "The Safety Leader" can share worldwide thanks to the portal integration with Microsoft Outlook. Moreover, users can search others Posters – allowing for the widest dissemination of one's HSE Commitment among other users. By applying this program, companies engaged all its Leaders and Management in the process of creating a strong HSE Culture and also, increasing the competition between leaders and program users by allowing each one to get access to others’ commitment posters. By taking part of this program, each user can see - online - his direct HSE Commitment and be aware of others’ results which is creating a strong and transparent ability of positive competition and real outcomes based on each one's performed activities. Once the companies applied this program, we can immediately see a considerable increase of HSE activities performed by all users and HSE leaders worldwide and this paper highlighted the results achieved & HSE performance improvement thanks to the way this program was created which helped a deep involvement of each leaders in the process of raising the HSE commitment of the company's management.

Carbon dioxide (CO2) photoreduction into renewable fuels over semiconductor photocatalysts has emerged as a green and sustainable alternative for energy production. Consequently, tremendous efforts are being performed to develop robust and sustainable photocatalysts. Therefore, visible-light active nanocomposite photocatalysts composed of 5.0–20.0 wt.% bismuth oxide (Bi2O3) and cerium oxide (CeO2) were synthesized by a sol-gel-based process. The prepared nanocomposites were evaluated for the promoted photocatalytic reduction of CO2 into methanol (CH3OH). Various characterizations of the obtained photocatalysts exposed an outstanding development of crystalline structure, morphology, and surface texture due to the presence of Bi2O3. Moreover, the absorbance of light in the visible regime was improved with enhanced charge separation, as revealed by the exploration of optical response, photoluminescence, and photocurrent measurements. The overall bandgap calculations revealed a reduction to 2.75 eV for 15% Bi2O3/CeO2 compared to 2.93 eV for pure CeO2. Moreover, the adjusted 2.8 g L−1 dose of 15% Bi2O3/CeO2 selectively produced 1300 μmol g−1 CH3OH after 9 h of visible light irradiation. This photocatalyst also exhibits bearable reusability five times. The improved progression of 15% Bi2O3/CeO2 is denoted by significant charge separation as well as enhanced mobility. This study suggests the application of metal oxide-based heterojunctions for renewable fuel production under visible light.

Zinc oxide (ZnO) nanocrystallites with different weight ratios are incorporated into carbon nanotubes (ZnO/CNTs) or graphene oxide (ZnO/GO) nanohybrids using ultrasonication/hydrothermal approach. The produced nanohybrids were tested in heterogeneous photocatalytic degradation of methylene blue dye (MB) under visible light illumination and in-situ ultrasonication. The zinc oxide incorporated carbon nanotubes nanohybrid having about 70 wt% of ZnO (ZnO(70)/CNT) showed marked visible light photocatalytic activity enhancement for MB degradation (99%, 0.5 g/L catalyst, 0.015 min−1) compared to the rest of the nanohybrids. The performance of MB degradation using ZnO(70)/CNT nanohybrid was even enhanced during employing the dual sonophotocatalysis approach achieving a rate constant of 0.019 min−1. This arises from the structural advantages at the ZnO(70)/CNT interface by which an improvement in electronic conductivity, facile electron transfer, charge carriers separation and increased oxygen vacancies were thoroughly achieved. This was highly ascertained via the catalysts characterization performed via many physiochemical techniques including XRD, TEM-SAED, FTIR, UV–Vis diffuse reflectance, and electrical conductivity, IPCE, PL and EIS. The scavenger studies of the photocatalytic and sonophotocatalytic processes of the MB degradation using ZnO(70)/CNT illustrate the importance of OH (followed by an electron) and holes (followed by OH), respectively proposing the importance of direct and indirect production of OH; as a strong oxidizing moiety.

Different loading of Ag nanoparticles (2 and 6%) modified TiO2 synthesized by employing polymeric template; comprises of polyvinyl alcohol and polyethylene glycol (Tev), were utilized to react hydrothermally (433 K for 48 h) with functionalized SWCNT and MWCNT. Several characterization techniques, including UV-visible diffuse reflectance spectroscopy, X-ray diffraction, HRTEM-ASED, and N2 sorptiometry were utilized for obtaining information about surface texturing, morphology, optical properties and crystalline phases. The synthesized photocatalysts were tested for their antibacterial activity against Escherichia coli (Gram negative bacterium) and Staphylococcus aureus (Gram positive bacterium) through agar well diffusion method under visible light irradiation (λ > 450 nm, 60 mWcm2). It has been revealed that the photocatalyst TevAg6-SWCNT exhibited the maximum lethal action thereby inhibiting the growth of bacteria as compared to rest of the catalysts; this was due to increase in surface area value with delay in electrons and holes recombination as well as the diameter of Ago nanoparticles which was reduced to 3 nm. It has been evidenced that the nanocomposites attack mechanism on while disinfecting bacteria indicates the formation of O2•− and ∙OH radicals, those played significant role in inactivation of cellular process. The TEM images revealed the role of Ag+ ions, and the presence of TevAg6-SWCNT were thoroughly studied and correlated to identify the disinfection mechanisms induced through irradiation of visible light.

Nanocomposites of hexagonal ZnO nanorods incorporated into carbon nanotube-graphene (ZnO/CNT-GO) were prepared using a simple hydrothermal approach. The structure, light absorption, surface texturing, and morphology characterizations have established the strong interaction between ZnO, carbon nanotubes, and graphene oxide components because of the presence of well-dispersed ZnO nanorods with an aspect ratio of 3.4 (L × D = 75 × 22 nm). The assembled dye-sensitized solar cell of a ZnO/CNT-GO photoanode exhibited a superior performance, with a power conversion efficiency of 7.73%, surpassing those of its ZnO/CNT (5.07%) and ZnO/GO (3.96%) counterparts. Although CNT-GO exhibited a higher incident photon-to-current conversion efficiency (IPCE) and lower photoluminescence (PL) intensity than those of the ZnO/CNT-GO composite, it presented a lower conversion efficiency of 5.60%. This can be attributed to the presence of structural defects at the CNT/GO interface, which resulted in lower electronic conductivity (0.25 × 10−3 Ω−1 cm−1 vs. 0.8 × 10−3 Ω−1 cm−1 for ZnO/CNT-GO) and optical performance. The ZnO/CNT-GO composite showed a superior Isc value of 17.6 mA/cm2 but a lower Voc value of 0.63 V in comparison to those of its ZnO/GO analog (3.9 mA/cm2, 0.8 V); it also showed a manifested increase in surface area and pore radius values (227.5 m2/g, 58.9 A) toward the dye absorption. The electrochemical capacitance performance obtained via using charge-discharge and impedance spectroscopy revealed an excellent specific capacitance in the order of ZnO/CNT-G (290 F/g) > CNT-G (275 F/g) > ZnO/G (230 F/g) > ZnO/CNT (183 F/g) at 1.0 A g−1. This is attributed to the synergistic effect of ZnO within the CNT/GO nanocomposite and affirms its charge collection efficiency toward the improvement of dye-sensitized solar cells. The formation of a p/n junction between CNT/G and ZnO nanorods, as evidenced by the Mott-Schottky analysis, played a vital role in the improvement of solar cell devices based on the narrowing of the band gap (Eg = 2.64 eV), ease of electronic transfer, transient photocurrent density, as well as framework mesoporosity.

Ag@Ag2O/RGO nanocomposites with different loads of Ag (0.4%–8.5%) were synthesized using a simple deposition method in the presence of a triblock copolymer template at different annealing temperatures (250 °C and 400 °C). All samples were characterized with various techniques such as XRD, FTIR, Raman, TEM-SAED, N2 sorptiometry and UV-Vis diffuse reflectance. The supercapacitor performance of the samples was measured. Besides, the catalytic performances of the samples towards 4-nitrophenol (4-NP) reduction were tested under dark conditions. The results revealed the well dispersion of Ag and Ag2O moieties on RGO with crystallite size in the range of 17–34 nm. The nanocomposite Ag@Ag2O/RGO annealed at 400 °C exhibited the highest reduction rate constant for 4-NP reduction (0.01 s−1). In addition, this composite has shown the highest specific capacitance of 312 F g−1 at scan rate of 20 mV s−1 and 119 F g−1 at a current density of 11 mA g−1.

The hydrogen evolution reaction (HER) achieved via electrochemical and photoelectrochemical measurements in an acid electrolyte (0.5 M H2SO4) was examined on hexagonal WO3 photoanodes of different morphological structures comprised of WO3 nanotubes (NT), nanorods (NR) and nanospheres (NS). The WO3 synthesized using free (NR) and inorganic templates (NS and NT) thru a new sonication/hydrothermal route was comprehensively characterized utilizing XRD, TEM-SAED, photoluminescence, UV–Vis diffuse reflectance, Raman, FTIR and N2 adsorption techniques. Herein, the WO3 NT with an average diameter of 2.9 nm and energy gap of 2.3 eV shows the best HER activity with an overpotential of −500 mV to offer a current density of 8.0 mA cm−2 that strikingly enhanced into 14 mA cm−2; at −410 mV, under visible light illumination (λ > 420). The electrochemical properties determined by cyclic voltammetry, EIS and Tafel plots argued that the activity of WO3 NT is accelerated due to small size, enhanced wettability (WO3.H2O); so as to facilitating the reaction with the electrolyte, together with the 1D assisted electron transfer. It was also emphasized that the HER activity is mainly controlled by the high oxygen vacancies; emphasized via XPS technique, decreased resistances and crystal orientations when using WO3 NTs rather than the high surface texturing properties devoted for the WO3 NRs (SBET = 54.3 m2 g−1, Vp = 0.084 cm3 g−1, pore radius = 6.5 nm). This wok provides a new approach for synthesizing a free Pt WO3 NTs photo-electrocatalyst with excellent stability; towards a remarkable HER, as examined via chronopotentiometry technique for 100 h.

This study were implemented within four growing seasons from 2017/2018 to 2020/2021. The five populations (P1, P2, F1, F2 and F3) of two crosses of bread wheat (Misr 3 x Shandaweel-1 and Giza 168 x Sakha 94) were evaluated in two locations during 2020/2021 growing season, at West West El-Minia and Sids Agricultural Research Station, Agricultural Research Center, Egypt, In order to determine the mode of gene action and the inheritance pattern of plant height, no. of spikes plant-1, no. of kernels spike-1, 100-kernel weight and grain yield plant-1. The t-test showed significant differences among parental genotypes of each cross for all studied characters. The mean effects (m) were highly significant for all characters under the study in the two crosses and locations, indicating the ability to enhance the performance of these characters by pedigree selection. Scaling test revealed the presence of nonallelic interactions (epistasis) in the most studied characters. Dominance gene effects were generally greater than additive ones in most characters. Gene effects varied among characters, whereas the dominance and duplicate dominance beside additive gene effects were found to play important role in the inheritance of most studied characters. The desired significant and highly significant positive heterotic effects to mid-parents for two crosses were detected in the two locations. Broad sense heritability estimates displayed moderate values in most characters. The highest expected genetic gain was found to be correlated with high heritability in narrow sense estimated in all studied characters.