Browsing by Author "S.K. Dutta"

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Alkaloids of Abrus precatorius
(1971) S. Ghosal; S.K. Dutta
Two new alkaloids, viz., methyl ester of N,N-dimethyltryptophan metho cation (I) and precatorine (II), were isolated from the seeds of Abrus precatorius L. (Leguminosae Lotoideae). In addition, abrine, hypaphorine, and two previously uncharacterized bases, now identified as choline and trigonelline (III), were isolated from the seeds. Other parts such as the leaves, stems and roots also furnished the above bases in varying proportions. This is the first report of the occurrence in Nature of trigonelline as the gallic acid ester (II). © 1972.
Alkaloids of Desmodium triflorum
(1971) S. Ghosal; R.S. Srivastava; P.K. Banerjee; S.K. Dutta
[No abstract available]
Alkaloids of the flowers of Arundo donax
(1971) S. Ghosal; R.K. Chaudhuri; S.K. Dutta
[No abstract available]
Arundo donax L. (Graminae). Phytochemical and Pharmacological Evaluation
(1969) S. Ghosal; S.K. Dutta; A.K. Sanyal; S.K. Bhattacharya
Five indole-3-alkylamine bases, viz., N,N-dimethyltryptamine, 5-methoxy-N-methyltryptamine, bufotenine, dehydrobufotenine, and bufotenidine, were isolated from the rhizomes of Arundo donax L. This is the first reported occurrence of bufotenidine and dehydrobufotenine in a plant species. A defatted ethanolic extract of the rhizomes produced hypotensive and antispasmodic effects against histamine-, serotonin-, and acetylcholineinduced spasms. Bufotenidine showed three main pharmacological actions, viz., antiacetylcholine effect which appears to lie more specific against skeletal muscle than against muscarinic sites, histamine release, and uterine stimulant. Xone of these actions of this compound had been reported previously. © 1969, American Chemical Society. All rights reserved.
Occurrence of erysotrine and other alkaloids in erythrina variegata
(1970) S. Ghosal; D.K. Ghosh; S.K. Dutta
[No abstract available]
Soil Health, Energy Budget, and Rice Productivity as Influenced by Cow Products Application With Fertilizers Under South Asian Eastern Indo-Gangetic Plains Zone
(Frontiers Media S.A., 2022) Pravin Kumar Upadhyay; Avijit Sen; Yashwant Singh; Ram Kumar Singh; Saroj Kumar Prasad; Ardith Sankar; Vinod Kumar Singh; S.K. Dutta; Rakesh Kumar; Sanjay Singh Rathore; Kapila Shekhawat; Subhash Babu; Rajiv Kumar Singh; Bipin Kumar; Abir Dey; G.A. Rajanna; Ramesh Kulshekaran
The comprehensive use of organic, inorganic, and biological components of nutrient management in rice ecologies can potentially address the twin challenges of declining factor productivity and deteriorating soil health. A field study was thus conducted at Varanasi, India during the year 2013–14 and 2014–15 to assess the effect of the recommended dose of fertilizers (RDF) along with cow product (blends of 5 cow by-products i.e., dung, ghee, curd, urine, and milk that is known as panchagavya) on soil health, energy budget, and rice productivity. The results revealed that the inclusion of panchagavya as seedling root dip + 6% spray at 30 days after transplanting (DAT) + an application with irrigation water (15 l ha−1) at 60 DAT (D4) along with 100% RDF (F3) noted significantly higher rice grain yield (6.34 t ha−1) and higher dehydrogenase activity. However, the soil bacterial and actinomycetes population, soil microbial biomass carbon (SMBC), urease, and alkaline phosphatase activities were significantly higher with D4 along with 120% RDF (F4). Carbon output (5,608 kg CO2 eq ha−1), energy use parameters viz. energy output (187,867 MJ ha−1), net energy returns (164,319 MJ ha−1), and energy intensity valuation (5.08 MJ (Figure presented.)) were significantly higher under F4. However, the energy ratio (8.68), energy productivity (0.292 kg MJ−1), and energy profitability (7.68) remained highest with 80% RDF (F2), while the highest carbohydrate equivalent yield (4,641 kg mha−1) was produced under F3. The combination of F3 with D4 resulted in the highest productivity, optimum energy balance, and maintaining soil quality. Therefore, a judicious combination of cow product (panchagavya) with RDF was found to improve the rice productivity, energy profitability, and soil quality under south Asian eastern Indo-Gangetic Plains (IGPs). Copyright © 2022 Upadhyay, Sen, Singh, Singh, Prasad, Sankar, Singh, Dutta, Kumar, Rathore, Shekhawat, Babu, Singh, Kumar, Dey, Rajanna and Kulshekaran.