114 research outputs found
Probing the potential of Al2CO/SiC heterostructures for visible light-driven photocatalytic water splitting using first-principles strategies
No full textPhotocatalytic water splitting is a sustainable and eco-friendly method for renewable energy production. The development of an efficient photocatalyst based on two-dimensional (2D) heterostructures with suitable band offsets is at the heart of relevant research activities. In this work, we predict a novel 2D heterostructure of Al2CO and SiC based on first-principles calculations of the structural, electronic, optical, interfacial, and photocatalytic mechanisms. The results indicate that AB stacking of the interface is energetically more favorable with a direct band gap of 2.27 eV. The interface exhibits strong covalent interaction, straddling-type band alignment, and suitable redox potentials for water splitting. Owing to their exceptional stability, the findings based on the work function revealed an efficient charge transfer mechanism due to the internal electric field. Furthermore, the optical properties of the structure indicate strong light harvesting ability in visible and ultraviolet regions. The findings suggest that the proposed heterostructure offer suitable band edge positions for hydrogen and oxygen evolution reactions. The mechanisms of water splitting, hydrogen and oxygen production are examined to explore the prospects of overall water splitting. Three fundamental steps—Volmer, Heyrovsky, and Tafel—are investigated to study the hydrogen evolution reaction (HER) activity. The screening of whole reaction pathways for oxygen production exhibited low theoretical overpotential and enhanced catalytic efficiency. This study demonstrates that the Al2CO/SiC heterostructure is a promising material for overall water splitting in various pH ranges under visible light irradiation
R from Zero to Hero (Arabic)
No full textThis is a course designed by Batool Almarzouq and delivered in JeelAIDM. All Materials are licensed under CC-BY license. CC-BY license means you can re-use, modify and build upon the materials with attribution to the source. The course is delivered over six weeks, with two sessions each week, each lasting two hours.
Week
Session
1
Introduction to R and Open Science
1
Project Management
2
R Markdown
2
GitHub in RStudio
3
Tidydata
3
Tidyverse
4
ggplot2 Part 1
4
ggplot2 Part 2
5
YAML in R Markdown
5
Blogging in R
6
Reproducibility with renv
6
Create your first R package!
The Slides are accompanied by live coding in this GitHub repository associated.The author acknowledges JeelAIDM for making the materials ope
Erratum: Cloaking using anisotropic multilayer circular cylinder (AIP Advances (2020) 10 (095312) DOI: 10.1063/5.0012769)
No full textCo-author Mehwish Nisar should have had an additional affiliation noted in the byline of our original manuscript.1 The correct affiliations for this manuscript are as listed above
Production and optimization of Amylase from A. niger isolated from legume seeds
No full textLegumes are type of plant whose fruit is enclosed in a pod. Chick peas, cow peas, peas, broad beans and kidney beans all are type of legumes. Legume seeds are important source of protein. Legume seeds are more proteinacious than non legumes. Many fungi are pathogens of legumes they infect during storage. Penicillium, Aspergillus, Mucor and Rhizopus are common genera isolates from seeds. Whereas A.niger is predominant and most recovered isolate of legume seeds. A.niger is widely used organism and now it is extensively used for the productivity of amylase enzyme. Amylase enzymes have vast applications at industrial level where it is used for the production of fructose and glucose syrup from starch degradation, biofuel formation, and production of dough, juices and cakes and in brewing industry. Amylases are also used as diagnostic tool. The ability to degrade starch is used as a standard for the determination of α-amylase production by A.niger. The determination of optimum time, pH, temperature, carbon and nitrogen sources are important for the better yield of the enzyme. A.niger produce amylase enzyme with greater extent at day 6 with pH 6 and at temperature 25 °C. It uses about all carbon and nitrogen sources but in maltose and ammonium sulphate production of amylase is higher. Submerged fermentation method is chosen technique for the production of amylase at laboratory level although it is not used widely at industrial level
A Simplistic Screening Assay of Antimicrobial Compounds and Enzymatic Activity from Local Soil Microbes
No full textInfluence of distributed leadership on employee innovative behaviour: the mediating role of psychological empowerment
No full textAbstract Employee innovative behaviour shapes the core competitiveness of an enterprise. Leadership style has been shown to influence employee innovative behaviour significantly. This research paper fills the gap by exploring the relationship between distributed leadership as an emerging leadership style and employee innovative behaviour along with psychological empowerment as mediator and organizational innovation climate as a moderator. 567 responses were collected from 29 different regions in China based on their availability through an adapted questionnaire. The data were analyzed using statistical software Mplus 6.0 and SPSS 19.0. The research results show that distributed leadership not only positively affects the innovative behaviour of employees but also has a positive impact on psychological empowerment and such empowerment positively influences employee innovative behaviour. The results also confirm that psychological empowerment mediates the relationship between the innovative behaviour of employees and distributed leadership. In addition, the organizational innovation climate moderates the relationship between psychological empowerment and the innovative behaviour of employees. The study not only contributed by confirming the moderating effect of organizational innovation climate on the relationship between psychological empowerment and employee innovative behaviour but also added directions for future researchers to explore more about the relationship between psychological empowerment and employee innovative behaviour along with theoretical research on enterprise leadership and management
Bacterial Appraisal in Expired and Unexpired Pharmaceutical Products
No full textThe microbial quality of expired and unexpired Pharmaceutical products like Metronidazole, Acetylsalicylic acid, Chloramphenicol, Silver sulphadiazine, combination of Polymyxin B Sulphate, Propylene Glycol, Lignocaine, combination of Betamethasone and Neomycinand the combination of Lignocaine, Ethanol and Cetylpyridiniumwere examined by the microbial growth on culture plates. Isolation was performed by serial dilution method and bacterial recovered by streak plate technique on Blood Agar, Chocolate Agar and MacConkey’s Agar. Isolates were characterized morphologically by gram staining and biochemical analysis. Microorganisms isolated from expired product are S.epidermidis (33.3%), B. subtilis (4.7%), Streptococcus (28.5%), Pseudomonas (9.5%), Listeria (4.7%) and B.cereus (19%) while B. subtilis(9.5%), Enterococcus (9.5%), E. coli (9.09%), S. epidermidis (27.2%), Listeria (9.5%) and Streptococcus (9.09%) are isolated from unexpired products. The isolated organism is mostly normal flora but opportunistic and pathogenic bacteria are also isolated which can cause disease especially in immune-compromised person or infants. The isolation of organisms may be due to improper hygiene maintenance or poor packaging techniques as the risk of contamination is higher while processing rather than during use. It revealed that quality of unexpired products have to be improved by producers to minimize the bio-liability so pharmaceutical companies should adopt good manufacturing practice to avoid microbial contamination in unexpired pharmaceuticals as well as the consumer should be educated and are aware of hazardous effect of using expired products
A qualitative study on the components of teacher leadership based on the perspective of teacher behaviour
No full textAbstract Exploring the constituent elements of teacher leadership is an important research direction for bringing innovation and entrepreneurship within teacher leadership research. However, there are very few studies on the components of teacher leadership based on the perspective of innovative teacher behaviour. This paper uses the method of grounded theory and the three-level coding technology of the qualitative analysis software Nvivo12.0 to code and analyse 33 Chinese core journal texts about teacher leadership in the CNKI database. In these texts, teaching students in an innovative and entrepreneurial way is the fundamental element, leading colleagues and assisting leaders to represent higher-level relationship elements, serving society is the highest-level element, and developing oneself is the driving force that runs through the entire process. A deep understanding of the constituent elements and structural dimensions of teacher leadership can help promote innovation and entrepreneurship through teachers’ independent development, mutual assistance, and cooperation, improve teachers’ leadership performance, and promote the development of students and schools
A Study on Bacteriological Detection of Food-Borne Pathogens
No full textThis study was conducted to estimate the bacteriological quality of different fast food items. Standard microbiological methods were used for isolation, enumeration and identification of bacteria. A total of 9 samples were collected from different sources like: Fries, Roll paratha, Zinger burger and some bakery products like bread, Rusk, simple cake, and some fresh fruits sample were also used like orange, banana and apple. Bacteria were isolated by serial dilution technique. Then isolation and identification of bacteria perform by cultural characteristics on Blood agar and MacConkey agar. Gram staining, colony morphology and biochemical characteristics also performed for further confirmation. Four strains of pathogenic organisms were identified as E.coli 29%, Staphylococcus epidermidis 25%, Pseudomonas 25%, Staphylococcus aureus 42.85% and Bacillus subtilis 29%. Recent study concluded that fast food can lead to food poisoning and food borne illnesses. Heftiness is related with an expansion in respiratory issue. Obesity increases the likelihood of heart diseases, kidney disease, joint pains, high blood pressure and diabetes. Your kidney stone, kidney disease and stomach cancer risk may also increase due to the excess amount of sodium, and may also increase your risk of developing osteoporosis (thin, fragile bones). The top risk factor for heart disease and stroke may cause due to the high cholesterol and high blood pressure. Chocolate and greasy foods were possessing high amount of carbohydrates increase blood sugar levels, they may also trigger acne. Fast food was identified as potential health hazards it can be proposed that satisfactory cleanliness rehearses are required in the wake of cooking the nourishments and furthermore before serving
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