Community water management to intensify agricultural productivity in the polders of the coastal zone of Bangladesh     

Yadav  Sudhir  Mondal  Manoranjan K.  Shew  Aaron  Jagadish  S. V. Krishna  Khan  Zahirul Haque  Sutradhar  Asish  Bhandari  Humnath  Humphreys  Elizabeth  Bhattacharya  Jayanta  Parvin  Rokhsana  Rahman  Mahabubur  Chandna  Parvesh 《Paddy and Water Environment》2020,18(2):331-343

Paddy and Water Environment - Most of the lands of the southern coastal zone of Bangladesh are protected from tidal flooding and storm surges by embankments constructed during the 1960s and 1970s,...  相似文献   

Comment on "Arsenic Mobility and Groundwater Extraction in Bangladesh" (I)     

Aggarwal PK  Basu AR  Kulkarni KM 《Science (New York, N.Y.)》2003,300(5619):584; author reply 584

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A nontoxic antitumour compound from the leaves of Bauhinia scandens characterized as 1-O-alkyl glycerol by gas–liquid chromatography and evaluation of its antitumour property by Brine Shrimp bioassay     

Asish Ghosh Hazra  Padma Chatterjee 《Industrial Crops and Products》2008,27(1):39-43

This is a report of extraction and identification of 1-O-alkyl glycerol present in the dried leaves of Bauhinia scandens. Fifty percent aqueous ethanolic extract of the plant at room temperature was fractionated over petroleum ether and diethyl ether. The diethyl ether soluble fraction showed positive bioactivity in Brine Shrimp bioassay. Isolation and purification of the active principle was subsequently done from diethyl ether fraction. The diethyl ether fraction was separated into acidic and neutral part. The acid free fraction was screened to be positive in Brine Shrimp bioassay. The NMR spectra (in CDCl₃) indicated the probability of its lipoidal nature. The total lipid fraction was resolved into neutral, glyco, and phospho-lipids by column chromatography. Only the neutral fraction showed positive response to Brine Shrimp toxicity test, out of which again a Brine Shrimp positive fraction was separated by thin layer chromatography and identified as 1-O-alkyl glycerol. This fraction was acetylated and GLC analysis of the 1-O-alkyl-2,3-diacetyl glycerol was done. Our results demonstrate that the work may be cited as a nonhazardous and nonchemical management of therapeutic importance.  相似文献   

Chondritic meteorite fragments associated with the Permian-Triassic boundary in Antarctica     

Basu AR  Petaev MI  Poreda RJ  Jacobsen SB  Becker L 《Science (New York, N.Y.)》2003,302(5649):1388-1392

Multiple chondritic meteorite fragments have been found in two sedimentary rock samples from an end-Permian bed at Graphite Peak in Antarctica. The Ni/Fe, Co/Ni, and P/Fe ratios in metal grains; the Fe/Mg and Mn/Fe ratios in olivine and pyroxene; and the chemistry of Fe-, Ni-, P-, and S-bearing oxide in the meteorite fragments are typical of CM-type chondritic meteorites. In one sample, the meteoritic fragments are accompanied by more abundant discrete metal grains, which are also found in an end-Permian bed at Meishan, southern China. We discuss the implications of this finding for a suggested global impact event at the Permian-Triassic boundary.  相似文献   

Morpho-physiological evaluation of Elymus semicostatus (Nees ex Steud.) Melderis as potential donor for drought tolerance in Wheat (Triticum aestivum L.)     

Kumar  Antul  Sharma  Achla  Sharma  Rajni  Choudhary  Anuj  Srivastava  Puja  Kaur  Harmanjot  Padhy  Asish Kumar 《Genetic Resources and Crop Evolution》2022,69(1):411-430

Genetic Resources and Crop Evolution - Gradual deterioration in water resources and unpredictable distribution pattern of annual precipitation amount are major threats having drastic effects on...  相似文献