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61.
Ranjan Jyoti Joshi Vayam Mandal Tamale Mandal Dalia Dasgupta 《Environmental science and pollution research international》2021,28(22):27954-27965
Environmental Science and Pollution Research - Chlorophenols are not only noticed in an effluvium of industries but also can emerge from the water treatment plants for domestic supply which poses a... 相似文献
62.
The present study were made to estimate the avian fauna in terms of species richness and diversity and guild structure in forest habitats of Nainital district of Uttarakhand (350–2.450 m asl; 29° N). Field studies were conducted during January 2007 to December 2008. Total 43, 62 and 42 species were recorded from, Haldwani, Bhowali and Nainital forest habitats. Results indicate the species relationship between Bird species richness (BSR) and elevation sections (forest habitats) was not decline simultaneously along elevation; it shows hump shaped. BSR varied considerably along elevational gradient (43 to 62 species), was highest (62 species) at mid elevation (Mixed pine forest, 1.350–1.700 m asl) and decreased (20 species) at high elevation (Conifer forest, 1900–2450 m asl). It seems that mid altitude bulge is not caused by the presence of a group of mid altitude specialists but rather that there is an overlap in the distribution of low land and high elevation specialists at this altitude. A checklist of 79 avian species has also produced of Nainital district forest habitats. It is suggested that this study provide a base line structure for further study on species distribution in different forest habitats and along different elevation section in Western Himalayas (India). 相似文献
63.
Kumar Devendra Pandey Aseesh Rawat Sandeep Joshi Mayank Bajpai Rajesh Upreti Dalip Kumar Singh Surendra Pratap 《Environmental science and pollution research international》2022,29(41):61579-61593
Environmental Science and Pollution Research - Himalaya, the highest mountain system in the world and house of important biodiversity hotspot, is sensitive to projected warming by climate change.... 相似文献
64.
This paper reports the development of a thermo-physical model for die-sinking electric discharge machining (EDM) process using finite element method (FEM). Numerical analysis of the single spark operation of EDM process has been carried out considering the two-dimensional axi-symmetric process continuum. The analysis is based on more realistic assumptions such as Gaussian distribution of heat flux, spark radius equation based on discharge current and discharge duration, latent heat of melting, etc., to predict the shape of crater cavity and the material removal rate (MRR). Using the developed model, parametric studies were carried out to study the effect of EDM process parameters such as discharge current, discharge duration, discharge voltage and duty cycle on the process performance. Experimental studies were carried out to study the MRR and crater shapes produced during actual machining. When compared with the reported analytical models, our model was found to predict results closer to the experimental results. The thermo-physical model developed can further be used to carry out exhaustive studies on the EDM process to obtain optimal process conditions. 相似文献
65.
The mid altitudinal oak, Quercus floribunda forms predominantly evergreen forest in Central Himalaya between 2000–2400 m. It is late successional, mature phase species
that has limited regeneration on disturbance prone sites. This oak produces mast seed crops at an interval of 2–3 years. During
masting in Q. floribunda the seed fall and germination is upto ten times greater than in normal years, emphasizing the importance of mast year crop
in forest maintenance. However, no mast year in this species since the last nine years (1997–2005) is a matter of serious
concern. The rise in the summer and winter temperature over a period of 15 years appear to have affected the frequency of
masting in this oak. The importance of masting can be adjudged from the fact that 97% of the surviving seedlings m−2 are of the mast year crop. 相似文献
66.
This paper presents a model using fuzzy synthetic evaluation to estimate the methane generation rate constant, k, for landfills. Four major parameters, precipitation, temperature, waste composition and landfill depth were used as inputs to the model. Whereas, these parameters are known to impact the methane generation, mathematical relationships between them and the methane generation rate constant required to estimate methane generation in landfills, are not known. In addition, the spatial variations of k within a landfill combined with the necessity of site-specific information to estimate its value, makes k one of the most elusive parameters in the accurate prediction of methane generation within a landfill. In this paper, a fuzzy technique was used to develop a model to predict the methane generation rate constant. The model was calibrated and verified using k values from 42 locations. Data from 10 sites were used to calibrate the model and the rest were used to verify it. The model predictions are reasonably accurate. A sensitivity analysis was also conducted to investigate the effect of uncertainty in the input parameters on the generation rate constant. 相似文献
67.
Bhave Nikhil Aniruddha Gupta Mahendra M. Joshi Sandeep S. 《Environmental science and pollution research international》2023,30(10):24842-24855
Environmental Science and Pollution Research - A lot of research is being carried out to reduce the environmental pollution resulting from compression ignition engines. For this, various gaseous... 相似文献
68.
Mandal Reshu Kaur Sukhbir Gupta Vinod kumar Joshi Amit 《Environmental geochemistry and health》2022,44(10):3215-3238
Environmental Geochemistry and Health - Heavy metals (HMs) have a very significant clinical role in the pathogenesis, progression and management of cardiovascular diseases (CVDs). The prevalence of... 相似文献
69.
Organophosphorous compounds (OP) have largely been used as pesticides globally. These chemicals induce oxidative stress as a possible mechanism of action, which has been a focus of toxicological research for the last decade. This review evaluated the presence of oxidative stress, balance between total antioxidant capacity, and oxygen free radicals associated with OP compound exposure. Oxidative stress induced by OP leads to disturbances in function of different organs and tissues. Evidence indicates that stimulation of free radical production, induction of lipid peroxidation, and disturbance of the total antioxidant capacity are mechanisms of toxicity induced by most OP. Thus, use of antioxidants may be beneficial in treatment of OP poisoning, which remains to be elucidated with further clinical trials. 相似文献
70.
Kun Li Min Yang Jianfeng Peng Ruiping Liu Tista Prasai Joshi Yaohui Bai Huijuan Liu 《Frontiers of Environmental Science & Engineering》2019,13(6):87