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Importance of halide perovskites for next generation solar cells – A review
Kalaiselvi, C.R.,Muthukumarasamy, N.,Velauthapillai, Dhayalan,Kang, Misook,Senthil, T.S. Elsevier 2018 Materials letters Vol.219 No.-
<P><B>Abstract</B></P> <P>Halide perovskites have recently emerged as a promising material for low cost and high efficiency solar cells. Dye Sensitized Solar Cells (DSSCs) are the forerunners of perovskite solar cells. In liquid based dye sensitized solar cell the power conversion efficiency is low and also it had some stability issues. In 2012, a long term stable and high efficiency perovskite solar cell emerged by replacing liquid electrolyte with the solid hole conductor. The attractiveness of organometal halide perovskites are having suitable direct bandgap with large absorption coefficients, low cost and solution based fabrication process. This review summarizes the basic concepts of perovskite, their fabrication and its eminent properties.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Importance of organic metal halide perovskite presented clearly. </LI> <LI> The basic concepts of perovskite, fabrication and its eminent properties summarized. </LI> <LI> The effect of hole transporting material to achieve remarkable photovoltaic performance was explained. </LI> </UL> </P>
Kalaiselvi Duraisamy,하아름(Areum Ha),Jongmun Kim,박애란(Ae Ran Park),김보라(Bora Kim),송찬우(Chan Woo Song),송효학(Hyohak Song),김진철(Jin-Cheol Kim) 한국식물병리학회 2022 Plant Pathology Journal Vol.38 No.3
Turfgrass, the most widely grown ornamental crop, is severely affected by fungal pathogens including Sclerotinia homoeocarpa, Rhizoctonia solani, and Magnaporthe poae. At present, turfgrass fungal disease management predominantly relies on synthetic fungicide treatments. However, the extensive application of fungicides to the soil increases residual detection frequency, raising concerns for the environment and human health. The bacterial volatile compound, 2,3-butanediol (BDO), was found to induce plant resistance. In this study, we evaluated the disease control efficacy of a combination of stereoisomers of 2,3-BDO and commercial fungicides against turfgrass fungal diseases in both growth room and fields. In the growth room experiment, the combination of 0.9% 2R,3R-BDO (levo) soluble liquid (SL) formulation and 9% 2R,3S-BDO (meso) SL with half concentration of fungicides significantly increased the disease control efficacy against dollar spot and summer patch disease when compared to the half concentration of fungicide alone. In field experiments, the disease control efficiency of levo 0.9% and meso 9% SL, in combination with a fungicide, was confirmed against dollar spot and large patch disease. Additionally, the induction of defense-related genes involved in the salicylic acid and jasmonic acid/ethylene signaling pathways and reactive oxygen species detoxification-related genes under Clarireedia sp. infection was confirmed with levo 0.9% and meso 9% SL treatment in creeping bentgrass. Our findings suggest that 2,3-BDO isomer formulations can be combined with chemical fungicides as a new integrated tool to control Clarireedia sp. infection in turfgrass, thereby reducing the use of chemical fungicides.
Mangiferin induces cell death against rhabdomyosarcoma through sustained oxidative stress
Vishwanadha Vijaya Padma,Palanisamy Kalaiselvi,Rangasamy Yuvaraj,M. Rabeeth 한국한의학연구원 2015 Integrative Medicine Research Vol.4 No.2
Background: Embryonic rhabdomyosarcoma (RD) is the most prevalent type of cancer among children. The present study aimed to investigate cell death induced by mangiferin in RD cells. Methods: The Inhibitory concentration (IC50) value of mangiferin was determined by an MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-Diphenyltetrazolium Bromide) assay. Cell death induced by mangiferin against RD cells was determined through lactate dehydrogenase and nitric oxide release, intracellular calcium levels, reactive oxygen species generation, antioxidant status, mitochondrial calcium level, and mitochondrial membrane potential. Furthermore, acridine orange/ethidium bromide staining was performed to determine early/late apoptotic event. Results: Mangiferin induced cell death in RD cells with an IC50 value of 70 μM. The cytotoxic effect was reflected in a dose-dependent increase in lactate dehydrogenase leakage and nitric oxide release during mangiferin treatment. Mangiferin caused dose dependent increase in reactive oxygen species generation, intracellular calcium levels with subsequent decrease in antioxidant status (catalase, superoxide dismutase, glutathione-S-transferase, and glutathione) and loss of mitochondrial membrane potential in RD cells. Further data from fluorescence microscopy suggest that mangiferin caused cell shrinkage and nuclear condensation along with the occurrence of a late event of apoptosis. Conclusion: Results of the present study shows that mangiferin can act as a promising chemopreventive agent against RD by inducing sustained oxidative stress.
Rathinasamy Baskaran,Palanisamy Kalaiselvi,Chih-Yang Huang,Viswanadha Vijaya Padma 한국한의학연구원 2015 Integrative Medicine Research Vol.4 No.4
Background Neferine, a bisbenzylisoquinoline alkaloid, isolated from Nelumbo nucifera has a wide range of biological activities. Cobalt chloride (CoCl2) was known to mimic hypoxic condition. In the present study, we assessed the cytoprotective effect of neferine against CoCl2-induced oxidative stress in muscle cells. Methods Rhabdomyosarcoma cells were exposed to different concentrations of CoCl2, and the IC50 value was determined using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Lactate dehydrogenase and NO assays were performed in order to determine the cytotoxic effect of CoCl2. Reactive oxygen species generation and cellular antioxidant status were determined for evaluating oxidative stress. For analyzing the effect of neferine on CoCl2-induced apoptosis, propidium iodide staining was performed. Results The results of the present study indicate that CoCl2 induces cell death in a dose-dependent manner. Neferine pretreatment at 700 nM concentration offers better cytoprotection in the cells exposed to CoCl2. Lactate dehydrogenase and NO release in the culture medium were restored after neferine pretreatment. CoCl2 triggers time-dependent reactive oxygen species generation in muscle cells. Further, results of propidium iodide staining, mitochondrial membrane potential, and intracellular calcium accumulation confirm that neferine offers protection against CoCl2-induced hypoxic injury. Depleted activities of antioxidants such as superoxide dismutase, catalase, glutathione peroxidase, and glutathione S-transferase due to CoCl2 exposure were also reinstated in the group that received neferine pretreatment. Conclusion Our study suggests that neferine from N. nucifera offers protection to muscle cells by counteracting the oxidative stress induced by CoCl2.
Embryogenic Callus Induction and Agrobacterium-mediated Transformation in Bentgrass (Agrostis spp.)
Ming Liang Chai,Kalaiselvi Senthil,Suk Yoen Mo(모숙연),Young Soo Chung(정영수),Sung Hyun Cho(조성현),Jeong Sheop Shin(신정섭),Mi Hyea Park(박미혜),Doo Hwan Kim(김두환) 한국원예학회 2000 Horticulture, Environment, and Biotechnology Vol.41 No.5