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A review on extraction and separation of cellulose fibers from agro wastes
Over the past few decades, there was significant increase in research concerning resources that have certain desirable characteristics like renewability, ease of availability, economic value, excellent mechanicalthermal properties, biocompatibility and biodegradability. Cellulose is one such resource that possesses these characteristics and yet various sources that constitute ample quantities of lignocellulose are discarded, as their peculiarities and applications were not widely known to the population. Agro wastes, which are generated every year at a tremendous rate, are viewed as a promising substrate for the commercial extraction of cellulose. Hence in this review, an appropriate utilization of these agricultural by-products, with respect to extraction of cellulose is discussed, so as to ameliorate their applications in an aim to diminish the disposal rate of essential commodities. 2021 World Research Association. All rights reserved. -
Is robotics education and training gender dependent? A suggestive robotics syllabus for teacher training
Application of robotics is rapidly increasing in all fields of life. Though robotics education became popular in the 21st century, its teaching and training has not gained much importance across the world, especially in developing and low-income countries. There are various reasons for its neglect and one of them could be gender-science stereotypes. Research studies are yet to explore the reasons for its slow emergence. The present study explores the need and training for educational robotics considering the role of students, teachers, teacher-educators and parents, determining whether it is gender-dependent or not. The study also proposes to come up with a syllabus for robotics training. The study employs exploratory, sequential, qualitative-quantitative mixed-method research design and applies purposive sampling techniques. Researchers conducted semi-structured interviews, including five science teacher-educators, five science teachers, and five trainee teachers majoring in sciences to understand the need, scope and benefits of robotics education. They recruited 100 high school students, 50 teacher-educators, and 100 parents to test whether their interest in robotics is gender-dependent through Chi-square analysis. The study revealed the need for robotics education under four themes and seven subthemes. It has been found that the interest of students and parents and the readiness of teacher-educators for robotics education is gender-dependent. The study came up with a suggestive syllabus for robotics training. It recommends that future researchers should focus on the implementation of robotics teaching for teacher and school education. 2021 Authors. -
Doping and Surface Modification of Carbon Quantum Dots for Enhanced Functionalities and Related Applications
Carbon quantum dots (CQDs) are a unique class of 0D nanomaterials, featured by a graphitic core and shell layers saturated with hydrogen atoms and functional groups. CQDs are prepared through top-down and bottom-up strategies from natural and synthetic precursors. CQDs can be modified through chemical (e.g., surface functionalization/passivation, doping, etc.) and physical (e.g., coreshell architecture, composite material blending, etc.) strategies to control their properties. This review highlights the effect of such modifications on the photophysical properties of CQDs, such as photoluminescence (PL), absorbance, and relaxivity. The dependence of PL upon the size, orientation at the edges, surface and edge functionalization, doping, excitation wavelength, concentration, pH, aggregate formation, etc., are summarized along with the supporting theoretical evidence available in the literature. Also, this review outlines the recent advancements, and future prospective of optical (e.g., sensing, bioimaging, and fluorescent ink) and catalytic applications (e.g., photocatalysis and electrocatalysis) of CQDs enhanced through physical and chemical modifications of their structure and composition. 2021 Wiley-VCH GmbH -
A survey of the studies on Gallai and anti-Gallai graphs
The Gallai graph and the anti-Gallai graph of a graph G are edge disjoint spanning subgraphs of the line graph L(G). The vertices in the Gallai graph are adjacent if two of the end vertices of the corresponding edges in G coincide and the other two end vertices are nonadjacent in G. The anti-Gallai graph of G is the complement of its Gallai graph in L(G). Attributed to Gallai (1967), the study of these graphs got prominence with the work of Sun (1991) and Le (1996). This is a survey of the studies conducted so far on Gallai and anti-Gallai of graphs and their associated properties. 2021 Azarbaijan Shahid Madani University. -
Opportunistic mycoses in COVID-19 patients/survivors: Epidemic inside a pandemic
Being considered minor vexations, fungal infections hinder the life of about 15% of the world population superficially, with rare threats to life in case of invasive sepsis. A significant rise in the intrusive mycoses due to machiavellian fungal species is observed over the years due to increased pathology and fatality in people battling life-threatening diseases. Individuals undergoing therapy with immune suppressive drugs plus recovering from viral infections have shown to develop fungal sepsis as secondary infections while recovering or after. Currently, the whole world is fighting against the fright of Coronavirus disease (COVID-19), and corticosteroids being the primitive therapeutic to combat the COVID-19 inflammation, leads to an immune-compromised state, thereby allowing the not so harmful fungi to violate the immune barrier and flourish in the host. A wide range of fungal co-infection is observed in the survivors and patients of COVID-19. Fungal species of Candida, Aspergillus and Mucorales, are burdening the lives of COVID-19 patients/survivors in the form of Yellow/Green, White and Black fungus. This is the first article of its kind to assemble note on fungal infections seen in the current human health scenario till date and provides a strong message to the clinicians, researchers and physicians around the world non-pathological fungus should not be dismissed as contaminants, they can quell immunocompromised hosts. 2021 -
A review on synthetic approaches towards kavalactones
Kavalactones are classes of ?-pyrone and 5,6-dihydropyrone derivatives showing various biological activities, and numerous approaches have been reported for the preparation of these molecules. In this review, we discuss the different synthetic approaches towards these naturally occurring lactones, in both racemic and enantiomerically pure forms, that have been reported in the literature to date. It is hoped that this review will assist researchers in the development of additional and efficient synthetic routes towards kavalactones. 1 Introduction 2 Synthetic Approaches for the Preparation of Kavalactones 3 Conclusion. 2021. Thieme. -
Roadmap of effects of biowaste-synthesized carbon nanomaterials on carbon nano-reinforced composites
Sustainable growth can be achieved by recycling waste material into useful resources without affecting the natural ecosystem. Among all nanomaterials, carbon nanomaterials from biowaste are used for various applications. The pyrolysis process is one of the eco-friendly ways for synthesizing such carbon nanomaterials. Recently, polymer nanocomposites (PNCs) filled with bio-waste-based carbon nanomaterials attracted a lot of attention due to their enhanced mechanical properties. A variety of polymers, such as thermoplastics, thermosetting polymers, elastomers, and their blends, can be used in the formation of composite materials. This review summarizes the synthesis of carbon nanomaterials, polymer nanocomposites, and mechanical properties of PNCs. The review also focuses on various biowaste-based precursors, their nanoproperties, and turning them into proper composites. PNCs show improved mechanical properties by varying the loading per-centages of carbon nanomaterials, which are vital for many defence-and aerospace-related indus-tries. Different synthesis processes are used to achieve enhanced ultimate tensile strength and mod-ulus. The present review summarizes the last 5 years work in detail on these PNCs and their appli-cations. 2021 by the authors. Licensee MDPI, Basel, Switzerland. -
Toxic Effects of Nanoparticles on Fish Embryos
Nanoparticles are used widely in the in-drug delivery, diagnostics, cosmetics, paints, electronics, fabrics, solar cells, medicines etc. Their wide application is due to their special properties which include minute size, high reaction rate, increased surface area and quantum effect. Despite their multiple applications, nanoparticles have harmful effects too due to their improper disposal causing their entry into the aquatic environment greatly threatening the ecological security as well as our health. Zebra fishes (Danio rerio) are used more commonly for the evaluation of toxicity and are considered a promising animal model. Studies on Salmon and Labeo rohita have also been used for toxicity evaluation. Nanoparticles affect the embryo more easily than the adult since the embryo are more sensitive. Hence it becomes important for us to study the effect of the nanoparticles on the embryo of the fishes. These nanoparticles have the ability to cross the chorion layer and affect the developing embryo. Since the fishes are a part of the food chain, when these organisms get affected they will eventually harm the humans too. This review focuses on the effect of metal nanoparticles (NPs) like gold(Au), silver(Ag), copper(Cu), platinum and metal oxides nanoparticles like titanium dioxide, aluminium oxide, copper oxide, nickel oxide zinc oxide on the embryonic development of fish embryos. When compared to the other nanoparticles (NPs) like silver, copper and platinum, it has been observed that the gold nanoparticles (Au NPs) showed no toxicity to embryos of zebrafish though few studies contradict this. Aluminium nanoparticles showed no toxicity and role of reactive oxygen species (ROS) in enhancing the toxicity of nanoparticles have also been discussed. 2021 World Research Association. All rights reserved. -
Antibacterial efficiency of carbon dots against Gram-positive and Gram-negative bacteria: A review
The nontoxic characteristics and inherent antibacterial potency of Carbon dots (CDs) have earned immense attention in the last few years. As the increasing antibiotic resistance of bacterial strains create critical health risks, replacement of conventional antibiotics with alternative antibacterial agents is highly encouraged. The light-driven antibacterial action CDs is a safe process with minimal side effects. Direct interaction of CDs with bacterial cells also contribute to the overall antibacterial activity. Unique and complex mechanisms of antibacterial activity of CDs involve ROS generation, degeneration of cell structure, and leakage of the cytoplasm because of DNA binding and modulation of gene expression. This review provides a systematic overview of the antibacterial potency of CDs to eradicate Gram-positive and Gram-negative bacteria. Various mechanisms of antibacterial activity and factors that contribute to antibacterial action of CDs also discussed. It also highlights the synergistic effects on the antibacterial performance of modified CDs and significant future research concerns. 2021 Elsevier Ltd -
Recent Advances in Hydrogenation Reactions Using Bimetallic Nanocatalysts: A Review
Hydrogenation reactions have been studied for many decades now and have developed from reactions that appear simple to now being recognized for their many complexities. These reactions are generally catalyzed using monometallic and more recently, with bimetallic nanocatalysts. Hydrogenation plays a vital role in food, chemical, petrochemical, pharmaceuticals, and dye industries to name a few. The hydrogenated products derived from several biomass-based compounds are potential fossil fuels. Such products when employed in daily life, can help conserve natural resources. While hydrogenation of alkynes and alkenes are among the simplest of hydrogenation reactions, the most extensive and elegant manifestation of this reaction is seen in polymerization. Polymers like polythene, polypropylene (plastic) have replaced materials like glass, stainless steel, etc., in making daily use items for the obvious advantages of the former. Purification of alkenes is achieved by partially hydrogenating the respective alkynes present in trace amounts. This serves as an important step in the polymerization process. The presence of nitro group on aromatic rings makes them carcinogenic in nature which harms living organisms. For a safe environment, the elimination or modification of this nitro group becomes imperative. The products of hydrogenation of nitroaromatics and amino aromatics form the basis of pharmaceuticals and dyestuffs. A plethora of bimetallic catalysts have been used to catalyze these hydrogenation reactions. These catalysts are evaluated based on their selectivity and efficiency. This review highlights the recent advancements in the field of hydrogenation of nitro compounds, carbonyl compounds, and unsaturated hydrocarbons catalyzed by bimetallic nanoparticles. 2021 Wiley-VCH GmbH -
Therapeutic effects of vitamin D and cancer: An overview
Since vitamin D's discovery, strenuous efforts to investigate its physiological exploit and deficiency on human health were done. Our body synthesizes fat-soluble vitamin D when get exposed to sunlight. In recent years, experimental data indicate that sunlight exposure and an adequate level of circulating vitamin D can reduce the incidence of cancer. Several in vitro and in vivo studies also suggest vitamin D as a potentially valuable supplement for cancer treatment and prevention. Nevertheless, there need to be adequate clinical studies performed to substantiate the suppressive ability of vitamin D concerning cancer incidence. Thus, understanding the cellular mechanisms of vitamin D can be advantageous for preventing several chronic diseases. Consequently, this review concentrates on different studies that have been conducted to characterize the outcome of vitamin D in reducing cancer incidence and its medication by cellular progression mechanism. 2021 The Authors. Food Frontiers published by John Wiley & Sons Australia, Ltd and Nanchang University, Northwest University, Jiangsu University, Zhejiang University, Fujian Agriculture and Forestry University. -
Immortality and beyond: review of the film Seo Bok
[No abstract available] -
Media in everyday life: review of the series Reply 1988
[No abstract available] -
Microbial Decomposition of Feather Waste
Keratin is generally found as an ?-keratin helix form in hair, nails, horns and ?-keratin sheet form found in feathers, scales, beaks and claws. ?-keratin contains a domain rich in residues favoring to form ?-sheet structures associated with the filament framework. 'N' and 'C' terminal domains are associated with the matrix and forms cross-linking via disulfide bonds. Several million tons of feather waste are generated by poultry industries each year. Since this waste is rich in protein, it contains excellent potential as a protein source for animal feed and other applications.Bacterial and fungal strains used in microbial degradation of feathers are summarized. Various species from the bacterium genus are involved in keratin degradation including Bacillus, Stenotrophomonas, Pseudomonas, Brevibacillus, Fusarium, Geobacillus, Chryseobacterium, Xanthomonas and Serratia which are some keratin degrading bacteria. Actinomycetes and fungi also contribute to feather degradation by the enzyme activity of keratinases. 2022 World Research Association. All rights reserved. -
Learning through Play: Gamification of Learning A Systematic Review of Studies on Gamified Learning
According to Gartner's Hype Cycle, gamification is poised for large-scale adoption in the coming years. The construct of gamification has received considerable interest, especially in the context of learning. Over the past five years, research in the area has grown. The current study looks at consolidating the conducted research and attempts to provide a snapshot of the work carried out in the last five years. The chosen studies have explored the role of gamification in learning activities and have attempted to provide empirical evidence to support gamified learning. The purpose of the study is to review existing literature, in terms of the outcomes, outcome variables, context of the study, and research methodology used. This would not only add to the knowledge in the field but would also guide future research. Additionally, practitioners would benefit from a consolidated view of five years of research into the practice of gamification. 2022 University of Tehran, Faculty of Management, Sridevi Nair and Jain Mathew -
Genetically modified foods: bibliometric analysis on consumer perception and preference
In this study, we present the bibliometric trends emerging from research outputs on consumer perception and preference for genetically modified (GM) foods and policy prescriptions for enabling the consumption using VOSviewer visualization software. Consumers positive response is largely influenced by the decision of the governments to ban or approve the GM crops cultivation. Similarly, the public support increases when the potential benefits of the technology are well articulated, consumption increases with a price discount, peoples trust on the government and belief in science increases with a positive influence by the media. Europe and the USA are the first region and country, respectively, in terms of the number of active institutions per research output, per-capita GDP publication and citations. We suggest research-, agri-food industries-, and society-oriented policies to be implemented by the stakeholders to ensure the safety of GM foods, encourage consumer-based studies, and increase public awareness toward these food products. 2022 The Author(s). Published with license by Taylor & Francis Group, LLC. -
ETHICAL CONFLICTS AMONG THE LEADING MEDICAL AND HEALTHCARE LEADERS
Today, the whole world is fighting the COVID-19 pandemic. In these circumstances, medical professionals are being viewed as the frontline warriors who are risking their lives for the sake of helping, caring, and curing these patients. However, in these difficult times, there are few medical professionals and health care providers who are taking advantage of this situation and taking advantage of distressed and distraught patients at will. A conflict between professional and personal ethical values makes them depressed and puzzled. It is tough for them to maintain a good image of their profession and business. The objectives of this study are to review the ethical conflict amid the ongoing Covid pandemic and post-Covid pandemic (vaccination period) in the context of medical professionals and health care providers. The paper is designed based on a literature review. Almost fifty-two research papers, articles, survey reports, and newspapers were studied in the context of ethics in business/profession. After reviewing moral distress is ongoing and post-pandemic period, the researchers have tried to present the medical professionals and health care providers' critical situation to give priority to their professional ethics or personal interest. School of Engineering, Taylor's University -
Recent advances in electrochemical and optical sensing of the organophosphate chlorpyrifos: a review
Chlorpyrifos (CP) is one of the most popular organophosphorus pesticides that is commonly used in agricultural and nonagricultural environments to combat pests. However, several concerns regarding contamination due to the unmitigated use of chlorpyrifos have come up over recent years. This has popularized research on various techniques for chlorpyrifos detection. Since conventional methods do not enable smooth detection, the recent trends of chlorpyrifos detection have shifted toward electrochemical and optical sensing techniques that offer higher sensitivity and selectivity. The objective of this review is to provide a brief overview of some of the important and innovative contributions in the field of electrochemical and optical sensing of chlorpyrifos with a primary focus on the comparative advantages and shortcomings of these techniques. This review paper will help to offer better perspectives for research in organophosphorus pesticide detection in the future. 2022 Informa UK Limited, trading as Taylor & Francis Group. -
IMPACT OF DIGITALIZATION AND CHANGING CONSUMER PREFERENCES AND CHOICES ON VIRTUAL SHOPPING OF RETAIL SECTOR IN BANGALORE
Purpose: This investigation covers the impact of digitalization on consumer behavior and their choices of virtual shopping in the retail sector of Bangalore. Design/ Methodology/ Approach: The introduction section covers the research background and its aim and objectives. Apart from that, the research rationale and significance are also enabled in this section's literature review. That theory is associated with the impact of digitalization, which changes consumer preferences and choices in virtual shopping. This focuses on changing consumer preferences and options in the retail sector, specifically in the Bangalore area. Digital marketing theory and Kotler theory are used in these chapters to understand better the reason for consumer preferences and choices in virtual shopping. It also conveys the research methods where positivism research philosophy was used, and the researcher also uses descriptive research design to reach the aims and objectives. Secondary data collection methods were used to collect reliable data per the chosen topic. In this section, inclusion and exclusion criteria are also mentioned, which are associated with the investigation Findings:Both qualitative and quantitative data are used to analyze the importance of offline shopping among the people of Bangalore. It is to explore that most consumers prefer to do online shopping by staying at home Originality/value:Offline shopping in the Bangalore area: Most people in the Bangalore area prefer to bring their Essentials through offline shopping. It is recommended that companies formulating this virtual shopping introduce their product with relevant details and descriptions. Research limitations: Limitations were found at the time of selecting relevant journals and articles. Some journals need authentic access, so data cannot be analyzed from these articles Social implications :The use of virtual platforms can effectively judge the demands and the preferences of the consumers. Moreover, various retail sectors can perform well by virtual shopping within their industry. 2022 Institute of Advanced Engineering and Science. All rights reserved. -
Wastewater treatment using chitosan and its derivatives: A mini review on latest developments
Effluents and contaminants released from the industries are needed to be treated before releasing them to water bodies. Most common effluents from these industrial wastes are organic compounds, dyes and heavy metals. Heavy metals and their associated anions, as well as organic material, have been separated from wastewaters in industries using a variety of methods. Adsorption is an effective method for water treatment as they are less energy consuming and cost effective. Biopolymers such as chitosan, cellulose, keratin are used for the process of adsorption as they are present abundantly and recyclable. Chitosan is a deacetylated product of chitin. Chitosan and its derivatives are extremely essential due to their abundant availability, low cost, environmental friendliness, and biodegradability and can be widely applied in wastewater treatment.-NH2 and-OH groups are present in chitosan and provide chitosan an opportunity to make physical and chemical modifications. Modifications of chitosan into hydrogels and nanocomposites provide wider applications in wastewater treatment. 2022, Horticulture and Forestry Society from Transylvania. All rights reserved.