371 research outputs found
Description of a new species of Nososticta Hagen (Odonata: Platycnemididae: Disparoneurinae) from Central Nicobar Islands, India
No full textA new damselfly species, Nososticta nancowra Rajeshkumar sp. nov. is described based on eight males and three females from Central Nicobar Islands, India. The diagnostic characteristics of the new species separating it from congeners are discussed. Morphological variations observed in the anal appendages of males and the pronotum of females are documented. A description of the new species using photographs and drawings is given. An identification key to species of the genus Nososticta occurring in Nicobar Islands is given for both sexes. </jats:p
Assessment on ground-level nitrogen dioxide (NO2) and ammonia (NH3) at secondary forest of Mata Ayer and Kangar, Perlis
No full textSustainable recycling technologies for thermoplastic polymers and their composites: A review of the state of the art
No full textThis review article discusses the environmental and economic effects of recycling, as well as sustainable thermoplastic polymer recycling technologies. Several researchers have utilized recycled thermoplastics as matrices in the production of a variety of natural and synthetic-based composites, which is also the focus of this study. All of the industries (food and packaging, construction and building, transportation, and indoor usage) where recycled thermoplastics have a large market share (food and packaging, construction and building, transportation, and indoor usage) are covered in this review. The desirable properties of thermoplastic polymers, such as corrosion resistance, low density, and user-friendliness, have caused plastic production to surpass aluminum and other metals in use over the past 60 years. Furthermore, recycling is one of the most important measures available to mitigate these effects and is one of the most dynamic segments of the plastics industry at present. Increased landfilling and incineration of plastics have a negative impact on the ecosystem, and the continued increase in the production of virgin fossil plastic also has a negative impact on the environment. Consequently, this continuous production could lead to the depletion of fossil fuel resources, an increase in environmental emissions during processing, and eventual incineration. Increasing numbers of nations are adopting the circular economy concept in an effort to avoid all of these problems. This concept emphasizes the reuse of products and resources, as well as the recycling of materials according to the waste hierarchy, rather than their cremation or disposal in the environment
Anticancer activity of eco-friendly gold nanoparticles against lung and liver cancer cells
No full textAbstractGold nanoparticles have many applications in biomedical field. Improving delivery of anticancer agents to tumors using nanoparticles is one of the most promising research arenas in the field of nanotechnology. Eco-friendly gold nanoparticles synthesis was studied using marine bacteria Enterococcus sp. The nanoparticle synthesis started at 2h of incubation time was identified by the formation of ruby red in the reaction mixture and SPR band centered at 545nm. XRD shows that the strong four intense peaks indicate crystalline nature of nanoparticles. Morphology of nanoparticles analyzed by TEM shows that they are mostly spherical in shape with size ranging from 6 to 13nm. EDX supports the presence of gold in the synthesized nanoparticles. FTIR reveals the active functional groups in the culture supernatant interaction with gold nanoparticles. As a result synthesized stable gold nanoparticles show more significant anticancer activity against HepG2 and A549 cells at 100μg concentration of nanoparticles. This synthesis approach is simple, large scaled up a new door for development of targeted anticancer activity using gold nanoparticles and is novel in biomedical applications
Mapping and Visualizing Research of COVID-19 with Immunology: A Bibliometric Study
No full textThis paper aims to demonstrate the World’s scientific contribution to COVID-19 and Immunology research for 2020–2022 and the emerging research pattern using various bibliometric parameters. The research publications were
retrieved from the SCOPUS database and analyzed using MS Excel, R Studio, and VOS Viewer software. The VOS Viewer software is mainly used for networking and visualization to understand the research pattern better. A total of 2877 documents were retrieved from SCOPUS using the search topic
COVID-19 and Immunology. The research found that DIAO B was a prolific author in COVID-19 and Immunology research, with 1247 publications. The most productive countries and institutions in this field were the USA (555 publications) and Huazhong university of science and technology (409
publications). The five hot author keywords are COVID-19, Sars-cov-2, Vaccine, Coronavirus and Antibody. The present study provides various networking map of research publications regarding the immune response
during COVID-19 infection. The results benefit researchers and practitioners in India and worldwide for understanding the pattern of research on COVID19 and identifying the potential immune response against SARS-CoV-
A Scientometric Exploration of Global Publications of Yoga Research from 2002-2021
No full textThe paper aims to provide an in-depth evaluation of the research output of Yoga for a period of 20 years, from 2002-2021. A total of 3498 documents retrieved from the Web of Science(WoS) database are considered for this analysis. The research finds that Cramer, H. was a most prolific author in Yoga scientific research with the highest 79 publications and top 2980 global citations. The most productive country is the USA, with 23967 publications, followed by India (5822) and Australia (2258). There was a significant increase in publications during the period of study. Most articles were published in the Journal of Alternative and Complementary Medicine. The highest number of Yoga research papers were contributed by two Indian institutions: All India Institute of Medical Sciences and the National Institute of Mental Health and Neuro-Sciences. Cramer H’ published the highest number of papers. The present study will be helpful for other researchers for further studies on Yoga research and policymakers for funding decisions and strategies
Corn starch nanocomposite films reinforced with nanocellulose
No full textThe need for flexible food packaging has increased substantially in recent years around the world due to the unprecedented growth in food consumption. Due to low cost and ease of processing, petroleum-based synthetic polymer packaging materials are being predominantly used for food packaging these days. To avoid contributing to environmental problems caused by ecological risks, consumers have been searching for alternatives to plastic food packaging due to the fact that plastics cannot be recycled and are not biodegradable. Therefore, bioplastics made from corn starch, which are biodegradable, can be one solution to these issues. The starch's amylopectin and amylase composition has a significant impact on the polysaccharide's characteristics. Corn starch (CS) is utilized as a food source for humans and other animals, but it also has many other applications in industry. Corn starch, on the other hand, has a few issues that need to be addressed through some modifications. Although starch-based packaging is expensive, they create less waste overall, which helps in the reduction amount of plastic pollution. A variety of natural and synthetic polymers-including polysaccharide-based materials like Kappaphycus alvarezii seaweed, collagen, alginate, chitosan, zein, cellulose, gelatin, various amino acids and polymeric materials like acrylic acid, polybutylene (PB), polyacrylic acid, polyethylene (PE), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), and polycaprolactone (PCL)-are used as starch modifiers to produce polymers with a starch base that are completely biodegradable. These biopolymers have the potential to replacing petroleum-based polymers in a variety of commercial and industrial settings. Besides, corn starch nanocomposite films reinforced with nanocellulose have been investigated as a potential eco-friendly packaging material. Consequently, the effects of nanocellulose content on the mechanical, thermal, and barrier properties of corn starchbased films will be discussed in this work
Corn starch nanocomposite films reinforced with nanocellulose
No full textThe need for flexible food packaging has increased substantially in recent years around the world due to the unprecedented growth in food consumption. Due to low cost and ease of processing, petroleum-based synthetic polymer packaging materials are being predominantly used for food packaging these days. To avoid contributing to environmental problems caused by ecological risks, consumers have been searching for alternatives to plastic food packaging due to the fact that plastics cannot be recycled and are not biodegradable. Therefore, bioplastics made from corn starch, which are biodegradable, can be one solution to these issues. The starch's amylopectin and amylase composition has a significant impact on the polysaccharide's characteristics. Corn starch (CS) is utilized as a food source for humans and other animals, but it also has many other applications in industry. Corn starch, on the other hand, has a few issues that need to be addressed through some modifications. Although starch-based packaging is expensive, they create less waste overall, which helps in the reduction amount of plastic pollution. A variety of natural and synthetic polymers-including polysaccharide-based materials like Kappaphycus alvarezii seaweed, collagen, alginate, chitosan, zein, cellulose, gelatin, various amino acids and polymeric materials like acrylic acid, polybutylene (PB), polyacrylic acid, polyethylene (PE), polyvinyl chloride (PVC), polyvinyl alcohol (PVA), and polycaprolactone (PCL)-are used as starch modifiers to produce polymers with a starch base that are completely biodegradable. These biopolymers have the potential to replacing petroleum-based polymers in a variety of commercial and industrial settings. Besides, corn starch nanocomposite films reinforced with nanocellulose have been investigated as a potential eco-friendly packaging material. Consequently, the effects of nanocellulose content on the mechanical, thermal, and barrier properties of corn starch-based films will be discussed in this work
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