Vinayaka Missions University

About: Vinayaka Missions University is a education organization based out in Salem, Tamil Nadu, India. It is known for research contribution in the topics: Population & Diesel fuel. The organization has 672 authors who have published 474 publications receiving 2924 citations.

Status review and the future prospects of CZTS based solar cell – A novel approach on the device structure and material modeling for CZTS based photovoltaic device

Abstract: Cu2ZnSnS4 (CZTS) based devices has become increasingly popular due to the better efficiency with different architectures for various types of solar cells. The present work reviews and analyzes the different CZTS based solar cells and its synthesis methods. The possible future prospects in the performance improvement of the CZTS based solar cell is analyzed in the present work with the approach based on the novel device architecture and material property. The novel device architecture using CZTS has electron blocking and hole blocking band offset, which can significantly improve the efficiency of the solar cell. Similarly, the first principle calculation on various composites of the CZTS based compound has revealed some interesting property, which has shown a new route for the CZTS based composite.

Sweet potato (Ipomoea batatas [L.] Lam)--a valuable medicinal food: a review.

Abstract: Ipomoea batatas (L.) Lam, also known as sweet potato, is an extremely versatile and delicious vegetable that possesses high nutritional value. It is also a valuable medicinal plant having anti-cancer, antidiabetic, and anti-inflammatory activities. Sweet potato is now considered a valuable source of unique natural products, including some that can be used in the development of medicines against various diseases and in making industrial products. The overall objective of this review is to give a bird's-eye view of the nutritional value, health benefits, phytochemical composition, and medicinal properties of sweet potato. Specifically, this review outlines the biological activities of some of the sweet potato compounds that have been isolated, the pharmacological action of the sweet potato extract, clinical studies, and plausible medicinal applications of sweet potato (along with a safety evaluation), and demonstrates the potential of sweet potato as a medicinal food.

CO gas sensing of ZnO nanostructures synthesized by an assisted microwave wet chemical route

Abstract: A simple wet chemical process assisted by microwave has been investigated for the synthesis of ZnO nanostructures for sensing applications. Characterization results have shown that microwave irradiation is able to quickly convert the reaction product zinc hydroxide into single phase crystalline ZnO. Different ZnO nanostructures (spherical-, flower- and star-like) have been prepared by adapting the experimental conditions. These ZnO nanostructures have been tested for CO gas monitoring by depositing them as thick films on an interdigitated alumina substrate and evaluating the surface resistance of the deposited layer as a function of operating temperature and CO concentrations. The gas sensitivity tests have demonstrated that the ZnO nanostructures, especially flower-like morphology, exhibit high sensitivity to CO proving their applicability in gas sensors. The role of the nanostructure on the sensing properties of ZnO is also discussed.

Antioxidant defense of betaine against isoprenaline-induced myocardial infarction in rats

Abstract: We investigated the antioxidant preventive effect of betaine on isoprenaline-induced myocardial infarction in male albino rats. Isoprenaline induced myocardial infarction was manifested by a moderate elevation in the levels of diagnostic marker enzymes (alanine aminotransferase, aspartate aminotransferase, lactate dehydrogenase and creatine phosphokinase) and homocysteine in plasma of experimental rats. Significant rise in the level of lipid peroxidation with a concomitant decline in the levels of myocardial non-enzymic (reduced glutathione) and enzymic antioxidants (glutathione peroxidase, glutathione-S-transferase, catalase and superoxide dismutase) was also observed. Oral pretreatment with betaine significantly prevented isoprenaline-induced alterations in the levels of diagnostic marker enzymes and homocysteine in plasma of experimental groups of rats. It counteracted the isoprenaline-induced lipid peroxidation and maintained the myocardial antioxidant defense system at near normal. Histopathological observations also confirmed the protective effect of betaine against isoprenaline-induced myocardial infarction. The results of the present investigation indicate that the protective effect of betaine is probably related to its ability to strengthen the myocardial membrane by its membrane stabilizing action or to a counteraction of free radicals by its antioxidant property.