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211.
Chubanaro Jamir Nitasha Sharma Asmita Sengupta N. H. Ravindranath 《Regional Environmental Change》2013,13(1):153-164
Certain parts of the State of Nagaland situated in the northeastern region of India have been experiencing rainfall deficit over the past few years leading to severe drought-like conditions, which is likely to be aggravated under a climate change scenario. The state has already incurred considerable losses in the agricultural sector. Regional vulnerability assessments need to be carried out in order to help policy makers and planners formulate and implement effective drought management strategies. The present study uses an ‘index-based approach’ to quantify the climate variability-induced vulnerability of farmers in five villages of Dimapur district, Nagaland. Indicators, which are reflective of the exposure, sensitivity and adaptive capacity of the farmers to drought, were quantified on the basis of primary data generated through household surveys and participatory rural appraisal supplemented by secondary data in order to calculate a composite vulnerability index. The composite vulnerability index of village New Showba was found to be the least, while Zutovi, the highest. The overall results reveal that biophysical characteristics contribute the most to overall vulnerability. Some potential adaptation strategies were also identified based on observations and discussions with the villagers. 相似文献
212.
Agrawal Yash Gupta Trilok Siddique Salman Sharma Ravi Kumar Panwar Narayan Lal 《Environmental science and pollution research international》2022,29(29):44067-44090
Environmental Science and Pollution Research - Mining and extraction of stones and minerals play a significant role in many countries economic growth in the world. The production of dolomite... 相似文献
213.
Behl Tapan Gupta Amit Sehgal Aayush Singh Sukhbir Sharma Neelam Garg Madhukar Bhatia Saurabh Al-Harrasi Ahmed Aleya Lotfi Bungau Simona 《Environmental science and pollution research international》2022,29(24):35643-35656
Environmental Science and Pollution Research - Diabetes is one of the most comprehensive metabolic disorders and is spread across the globe. The data from IDF Diabetes Atlas and National Diabetes... 相似文献
214.
Sharma Aaradhya Gunreddy Neha Mulamalla Akshith Reddy Duraisamy Sakthivadivel Sivan Suresh Poongavanam Ganesh Kumar Kumar Balaji 《Environmental science and pollution research international》2022,29(58):87019-87067
Environmental Science and Pollution Research - The primary objective of the paper is to identify the effective way to enhance the conductive and convective heat transfer of the FPSC. The... 相似文献
215.
Bhatia Saurabh Al-Harrasi Ahmed Behl Tapan Anwer Md. Khalid Ahmed Mohammed Muqtader Mittal Vineet Kaushik Deepak Chigurupati Sridevi Kabir Md. Tanvir Sharma Pritam Babu Chaugule Bhupal Vargas-de-la-Cruz Celia 《Environmental science and pollution research international》2022,29(10):14380-14392
Environmental Science and Pollution Research - Several studies have suggested the direct relationship between skin complications, air pollution, and UV irradiation. UVB radiations cause various... 相似文献
216.
Nathaniel F. Adegboyega Virender K. Sharma Leslie Cizmas Christie M. Sayes 《Environmental Chemistry Letters》2016,14(3):353-357
Nanoparticles occurring in the environment originate either from engineered, synthetically produced nanoparticles, or from naturally produced nanoparticles. The latter can be formed in natural media by light-induced reduction of metal ions in presence of natural organic matter, such as humic substances occurring widely in waters, soils and sediments. There is actually few knowledge on the effect of sunlight and of the nature of organic matter on nanoparticle formation. Therefore, we studied here the photoreduction of silver(I) ion to silver nanoparticles with and without ferrous ion under oxic and anoxic conditions, using humic and fulvic acids as proxies of natural organic matter. UV light-induced formation of silver nanoparticles was monitored up to 60 min by measuring surface plasmon resonance in air-saturated mixture and nitrogen-saturated mixture of silver(I) ion–organic matter. Results show that the surface plasmon resonance intensity was about 2.5 times higher in the nitrogen-purged solution mixture than the air-saturated solution. This finding suggests the oxygen-containing species had no major role in forming silver nanoparticles. Therefore, photo-driven formation of silver nanoparticles most likely involved photoactivation of silver(I) ion and natural organic matter complexes. We observed also that both iron(II) and iron(III) ions highly modified the surface plasmon resonance spectra of the particles with broader features. Results also reveal that in the presence of humic acid, the intensity of the surface plasmon resonance peak decreased by at least 50 %, while almost no change in the intensity was seen when fulvic acid was used. Overall, our findings demonstrate that the ligand–metal charge transfer process, affected by the nature of organic matter, i.e., humic acid versus fulvic acid, was influenced by redox iron species. 相似文献
217.
Tobacco exposure may alter homeostasis of iron (Fe), one of the most abundant and essential transition metals in the body. In this study, the effect of aqueous extract of smokeless tobacco was evaluated on Fe homeostasis in rats and human hepatoma, HepG2 cells. Our findings suggested that tobacco consumption even at low doses impairs Fe homeostasis leading to Fe deficiency anemia. Significant alterations were noted with respect to hematological parameters and expression patterns of selected intestinal Fe-transporters, Fe-binding proteins, and Fe-regulatory hormone, hepcidin. Impairment in the hepatic and renal antioxidant defense system was also observed in the treated rats. Histopathological studies revealed cirrhosis of liver and goblet cell hyperplasia of small intestine. Further, analysis of hepcidin promoter and its expression along with ferritin (expression and ELISA) in HepG2 cells demonstrated an enhanced expression of both the genes resulting in sequestration of Fe in treated cells, thus indicating systemic Fe deficiency. 相似文献
218.
Studies concerning bioaccumulation kinetics and bioconcentration factor (BCF) of heavy metals like zinc (Zn), lead (Pb), chromium (Cr), cadmium (Cd), and copper (Cu) in earthworm Eudrilus eugeniae tissues including integument, gizzard, clitellum, and head region were undertaken. Calculated BCF, predicted K ow, and predicted K oc showed a significant correlation between heavy metals in different earthworm tissues, in substrate spiked with heavy metals. The regression coefficient (r 2) between heavy metal uptake concentration and exposure time varied between 0.73 and 0.99, indicating significant correlation. The K oc was a maximum of 13.9016 in case of Cu and integument at an exposure time of 100 days and a minimum of 0.1114 in case of Cr with respect to head at the same exposure time. Earthworms accumulated heavy metals following chronic exposure to municipal solid waste containing heavy metals. BCF and uptake rate kinetics of heavy metals were calculated and showed increased values in head tissue followed by integument. 相似文献
219.
AbstractThe in vivo genotoxic potential of bisphenol A using the comet assay in mice and in human sperm cells in vitro without metabolizing enzymes was studied. Male mice were exposed by oral gavage to the following doses of bisphenol A (0 125, 250 and 500?mg/kg body weight). DNA damage was investigated in liver, kidney, testes, urinary bladder, colon and lungs cells. In testicular cells, a significant increase in DNA strand breaks was observed in the lowest, but not in the medium or highest dose groups. Histopathological investigation of the testicular samples did not show any treatment dose-related effects. No DNA strand breaks were observed in any of the other investigated tissues. In human sperm cells in vitro, bisphenol A did not induce DNA strand breaks. 相似文献
220.
Normal female rats of Wistar strain (Rattus norvegicus) weighing between 150–200 g were treated with fluoride (Fl) contaminated drinking water (FW, 5.8 ppm), vitamin C (6 mg) and vitamin C (6 mg) + D (6 mg once a week) + calcium (6 mg) for 30 days. Fl water treatment to rats produced reduction in weights of ovaries, uterus, vagina, kidneys, and adrenal glands, circulating levels of estrogen, number of litters, fertility rate, and altered tissue and serum biochemistry compared to control rats. However, cholesterol concentrations of ovaries and adrenals increased significantly. The above altered parameters were restored partially/completely after exogenous feeding with vitamin C and vitamins (C + D) and calcium. The data suggest that Fl-induced adverse effects on reproductive and other organs in female rats, whereas vitamin C, vitamin D and calcium treatment ameliorated Fl toxicity. Therefore, vitamins (C and D) and calcium play an important role in prophylactic treatment of fluorosis. 相似文献