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11.
Bansal SK Singh KV 《Journal of environmental biology / Academy of Environmental Biology, India》2007,28(4):829-832
Relative susceptibility of three important mosquito vector larvae viz., Anopheles stephensi, Aedes aegypti and Culex quinquefasciatus, prevalent in the arid region was determined against four organophosphates (malathion, fenitrothion, fenthion, temephos) and three synthetic pyrethroid (alphamethrin, deltamethrin and fanvalerate) compounds. Studies were carried out on late 3rd or early 4th instar larvae of these species using standard WHO technique. Based on concentration mortality data LC50 and LC90 values along with their fiducial limits, regression equation, chi-square (chi2)/heterogeneity of the response have been determined by log probit regression analysis. LC50 values as observed for the above seven insecticides were 0.8097, 0.0398. 0.0432, 0.0035, 0.0025, 0.0092, 0.1006; 1.2370, 0.0531, 0.0655, 0.0076, 0.00004, 0.00004, 0.0046 and 1.4980, 0.0719, 0.0817, 0.0056, 0.00021, 0.00073, 0.0112 mg/l for the above three mosquito species respectively Among the four organophosphates tested temephos was the most effective followed by fenitrothion, fenthion and malathion. In general, Anopheles was found more susceptible as compared to the other two culicines to the above four compounds. The results also showed that larvae of Ae. aegypti were most susceptible followed by Cx. quinquefasciatus and An. stephensi to all the three pyrethroids tested. Among the three compounds tested alphamethrin was found to be the most toxic followed by deltamethrin while fanvalerate was the least toxic. The study would be of great importance while planning use of these insecticides for the control of different vector species in this area. 相似文献
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Kubilay Gok Mayowa T. Babalola C. Lakshman John J. Sumanth Linh Chi Vo Stijn Decoster Anjali Bansal Ahmet Coşkun 《组织行为杂志》2023,44(1):157-175
Based on social cognitive theory (SCT), we develop and test a model that links ethical psychological climate to ethically focused proactive behavior (i.e., ethical voice and ethical taking charge) via two distinct mechanisms (i.e., duty orientation and moral potency). Results from multi-wave field studies conducted in the United States, Turkey, France, Vietnam, and India demonstrate that an ethical psychological climate indirectly influences employees' ethical voice and ethical taking charge behaviors through the dual mechanisms of duty orientation and moral potency. Additionally, we find that individuals' moral attentiveness strengthened these mediating processes. Together, these findings suggest that ethical psychological climate is an important antecedent of ethically focused proactive behavior by stimulating individuals' sense of duty and enhancing their moral potency, particularly when employees are already highly attuned to moral issues. 相似文献
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Environmental Economics and Policy Studies - The paper considers a discrete continuous model where consumers choose quality of the product they buy as well as its usage. The product has two quality... 相似文献
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Rai HS Singh S Cheema PP Bansal TK Banerjee UC 《Journal of environmental management》2007,83(3):290-297
In the present study, decolorization of a simulated dye waste containing three different triphenylmethane (TPM) dyes--Magenta, Malachite Green and Crystal Violet, was investigated in a laboratory scale, two-stage anaerobic high-rate reactor. The effect of various parameters (influent dye concentration, hydraulic and co-substrate loading rates) on color and COD removal efficiency of the reactor has been studied. It has been shown that the influent dye concentration had little effect on overall COD and color removal efficiency. More than 99% color removal and 96% COD removal efficiency were maintained even at a dye concentration of 500 mg/l and a dye loading rate of 1000 mg/l day. However, a minimum level of glucose as supplementary carbon source is required to maintain the maximum color removal efficiency and it drops appreciably when no glucose is added to the influent. The study also showed that the acidogenic phase of the reaction plays an important role in decolorization of the TPM dyes. In addition, the two-stage anaerobic reactor was observed to have distinct advantages over the single-stage system, as the drop in color and COD removal efficiency of stage 1 are adequately compensated by stage 2 of the reactor especially under high dye loading rates accompanied by low co-substrate loading and under reduced HRTs. 相似文献
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Elshaghabee Fouad M. F. Rokana Namita Panwar Harsh Heller Knut J. Schrezenmeir Jürgen 《Environmental Chemistry Letters》2019,17(4):1553-1563
Environmental Chemistry Letters - Non-alcoholic fatty liver disease (NAFLD) is characterized by an increase in fat content of liver cells, which is independent from alcohol intake. Here, we review... 相似文献
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Granular activated carbon (GAC) loaded with trinitrotoluene (TNT) and nitrobenzene (NB) were subjected to different atmospheres, such as nitrogen, oxygen, air, steam and an air-steam mixture, at varying temperatures and for different time intervals for regeneration. The air-steam mixture proved to be the best regenerating media for the explosive-loaded GACs. The regeneration of the activated carbon was found to be above 85% for TNT and above 90% for NB loaded carbons. 相似文献
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Singh Namita Ashish Kumar Naresh Raghu H. V. Bhand Sunil Chandra Sudhir Sharma Pradeep Kumar 《Environmental Chemistry Letters》2019,17(2):1097-1103
Environmental Chemistry Letters - Aflatoxin M1 contamination in milk and dairy products is a major issue worldwide. Aflatoxin is a carcinogen that enters into the milk through animals feed. Here,... 相似文献
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Ajay Kumar Meena Parveen Bansal Sanjiv Kumar M. M. Rao V. K. Garg 《Environmental monitoring and assessment》2010,170(1-4):657-660
Popularity of herbal drugs is increasing all over the world because of lesser side effects as compared to synthetic drugs besides it cost effectiveness and easy availability to poor people particularly in developing countries. Keeping in view the increased market demand of herbal drugs, it is essential to ensure their chemical quality prior to use. Raw drugs and herbs are usually collected from different places, which might be contaminated with various contaminants. It is pertinent to estimate the levels of heavy metals and other micronutrients, which could be affected by their presence in the surrounding environments. Heavy metals are known to pose a potential threat to terrestrial and aquatic biota. Keeping this in view, samples of ten plants or plant parts used in drug making were collected from local markets of Punjab for heavy metal and micronutrient estimation. It was found that the samples were contaminated having cadmium, lead, chromium, iron, manganese, and zinc. The highest mean level of cadmium (23.1 μg/kg) was found in Haritaki sample. Chromium concentration of the plant samples ranged between 7.25 and 1.34 μg/kg with the highest values was in Daruharidra and lowest in Pippali. The levels of these heavy metals were within permissible limits 相似文献