排序方式: 共有28条查询结果,搜索用时 15 毫秒
21.
Khandelwal Kapil Nanda Sonil Boahene Philip Dalai Ajay K. 《Environmental Chemistry Letters》2023,21(5):2619-2638
Environmental Chemistry Letters - The rising issues of global warming due to the rapid use of fossil fuels are calling for sustainable energies such as dihydrogen, thereafter named... 相似文献
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Sarker Tumpa R. Nanda Sonil Meda Venkatesh Dalai Ajay K. 《Environmental Chemistry Letters》2023,21(1):231-264
Environmental Chemistry Letters - The demand for bioenergy is increasing due to the diminishing popularity of fossil fuels and rising greenhouse gas emissions. However, according to recent reports,... 相似文献
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Desai HS Nanda B Panigrahi J 《Journal of environmental biology / Academy of Environmental Biology, India》2002,23(3):275-277
Toxicological effects of some biochemical parameters of freshwater fish Channa punctatus (Bloch), under the stress of Nickel (NiSO4. 6H2O), at various concentrations of 10, 20, 30 and 40 ppm for 30 days were observed. Gradual decrease in the levels of liver protein and liver ascorbic acid due to proteolysis and liver glucose breakdown respectively was observed. Contradictorily, high liver cholesterol level, may be due to hepatic disfunctioning and accumulation in brain. There was also gradual decrease in the brain protein level showing significant alterations but the brain ascorbic acid level showed no significant alterations. Decrease in the protein and ascorbic acid level and increase of cholesterol level thus indicates stressful condition of the fish. 相似文献
24.
Sajalendu Nanda 《The Environmentalist》1999,19(4):343-347
Measurement of the primary production has been estimated over a study area of approximately 25 km2 of the North Koel River, in the Palamau District, in Bihar, India. A caustic chemical factory which is discharging effluent into the river is situated at Rehala, Palamau, on the bank of the North Koel. Huge amounts of mercury are released into the river. The physical and chemical characters of the caustic chemicals in the effluent have a significant influence on the primary production on the North Koel river. The gross production is compared with other fresh water habitats (riverine and other) in India. It is observed that the gross production value is the lowest (at 1.14 gc/m2/day) of any recorded riverine ecosystem in India. 相似文献
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Due to the slow rate of incorporation of inert-metal ions into free-base porphyrins compared to other transition metals, several
methods have been proposed to accelerate the rate of metalation. However, these methods have disadvantages such as low yields,
difficulties of purification of final products, and environmental effects. To avoid those disadvantages, we reacted Pt(II)
and Pd(II) salts with H2(TPP), H2(TMPyP)4+, and their β-pyrrole derivatives, H2(Br8TPP) and H2(Br8TMPyP)4+, in 1-butyl-3-methylimidazolium bromide ([bmim]+Br−) under microwave irradiation. The combination of microwave heating and ionic liquids provides efficient thermal energy transfer
among the porphyrins and metal salts. In addition, ionic liquids stabilize charged species as well as their intermediates,
due to their high dipole moment and high boiling point. This not only shortens the reaction time but also gives high yields
of products at relatively low temperatures, of about 100°C compared to conventional synthesis methods: 150°C for DMF, 190°C
for DMSO. Here, we demonstrate that Pt(II)/Pt(II) metalloporphyrins are synthesized at high rates, e.g. 6–30 min for 100%
metalation, with high yields of 79–93% in [bmim]+Br− by microwave activation. 相似文献
28.
Nanda Sonil Patra Biswa R. Patel Ravi Bakos Jamie Dalai Ajay K. 《Environmental Chemistry Letters》2022,20(1):379-395
Environmental Chemistry Letters - Non-biodegradable plastics are continually amassing landfills and oceans worldwide while creating severe environmental issues and hazards to animal and human... 相似文献