نتایج جستجو برای: economical conditions
تعداد نتایج: 864346 فیلتر نتایج به سال:
Small Scale Solar Cooling Unit in Climate Conditions of Latvia: Environmental and Economical Aspects
Maize ranks first among worldwide production and an important source of human animal feed. Its can be affected by management practices climatic conditions. The objective this study was to estimate stability yield hundred grains weight six maize genotypes during two growing seasons at locations, subjected four different treatments: T1 treatment—without herbicide, Control; T2 treatment—active sub...
The electric system needs to balance supply and demand on a moment to moment basis. Energy commodities such as coal, oil and natural gas can be readily stored in massive quantities. However, the storage of electricity has been relatively complex and expensive. Today, with the changing ways in which electricity is generated and used, increased penetration of renewable energy sources and smart gr...
Cultivation of an important sub alpine-alpine medicinal and aromatic herb, Angelica archangelica Linn. (Apiaceae), was carried out at two different climatic zone at 2200 m asl (Pothivasa, PV) and 3600 m asl (Tungnath, TN) altitudes in Garhwal, North west Himalaya, India. These altitudes represent temperate and alpine region of the Himalaya. Since the species has a very few wild populations, cul...
a simple, clean, and environmentally benign three-component process for the synthesis of 2-amino-4hchromenes using [mim]cl, as an efficient catalyst under solvent-free conditions are described. a wide range of aromatic aldehydes easily undergoes condensations with 1-naphthol and malononitrile under solvent-free conditions to afford the desired products of good purity in excellent yields. taking...
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