Author
R. N. Chopra
Bio: R. N. Chopra is an academic researcher from Calcutta School of Tropical Medicine. The author has contributed to research in topics: Malaria & Holarrhena. The author has an hindex of 8, co-authored 61 publications receiving 6823 citations.
Papers published on a yearly basis
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TL;DR: Tate (1921) pointed out that tinctures of standard strength deteriorate in a warm climate and Newcomb and Rogers (1918) laid much emphasis on the effects of temperature on the strength of various preparations.
Abstract: alcohol according to them showed no greater ?deterioration than the leaves. Roth (1916) found by the " one hour frog method " largevariations in the strengths of tinctures. Newcomb and Rogers (1918) laid much emphasis on the effects of temperature on the strength of various preparations and considered that even chilling below 40? F. for a short time decreased the potency of tinctures by an increase in the natural precipitation, which carried down some of the active principles of the drug. Tate (1921) pointed out that tinctures of standard strength deteriorate in a warm climate
1 citations
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TL;DR: Cilional, claimed to be as potent as that of plasmochin, in doses far less than, any that produced toxic symptoms, proved sufficient to make the crescents disappear from the 'peripheral blood.
Abstract: Cilional was introduced by Schulemann of Messrs. Bayer-Meister-Lucius, Germany, a few years ago. It belongs to the plasmochin series of preparations and has the composition di-alkylamino-alkyl-amino-oxy-quinoline. Its action on the gametocyte of Plasmodium falciparum was claimed to be as potent as that of plasmochin, in doses far less than, any that produced toxic symptoms. A total dose of 0.18 to 0.3 gramme (in daily doses of 0.06 gramme) proved sufficient to make the crescents disappear from the 'peripheral blood. Atebrin was also given at the same time
1 citations
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TL;DR: The discovery of antimalarial properties ni Plasmochin and acridine derivatives such -is '?
Abstract: The discovery of antimalarial properties ni Plasmochin and acridine derivatives such -is '?tebrin is undoubtedly a great advance in the herapy of malaria. The untoward symptoms which are occasionally observed, their inability to prevent relapses in a certain percentage of cases and their not having a true prophylactic a?tion, inasmuch as they have no action on the ?P?rozoites injected by the mosquitoes, have however necessitated a vigorous search for drugs
1 citations
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TL;DR: 45 plants and their products that have been mentioned/used in the Indian traditional system of medicine and have shown experimental or clinical anti-diabetic activity are reviewed.
1,641 citations
TL;DR: Qualitative phytochemical tests, thin layer chromatography and TLC-bioautography of certain active extracts demonstrated the presence of common phytocompounds in the plant extracts including phenols, tannins and flavonoids as major active constituents.
1,247 citations
1,062 citations
TL;DR: Among various extracts, only alcoholic extracts of Emblica officinalis, terminalia chebula, Terminalia belerica, Plumbago zeylanica and Holarrhena antidysenterica were found to show potentially interesting activity against test bacteria.
1,040 citations