The bark of Strychnos potatorum L. (Loganiaceae), is used as an adulterant of S. nux-vomica L. The latter is highly poisonous, containing the alkaloids strychnine and brucine, whereas the former is nonpoisonous. The two barks could be distinguished by pharmacognostic evaluation. © 1988 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted.

S CHAKRABORTI

A MUKHERJI

P C DATTA

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

&nbsp;

The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

&nbsp;

It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Comparative Pharmacognosy of Strychnos nux-vomica and Strychnos potatorum Stem Barks

Pharmaceutical Biology

The surface morphology of dewaxed jute and of dewaxed and scoured flax and ramie fibres, and the effect of chemically modified morphologies were compared using scanning electron microscopy (SEM). Limited oxidation results in the removal of surface impurities of the bast fibres, producing strands which are clearly distinguishable in the SEM. Treatment of the oxy-fibres with excess phenol (P) and formaldehyde (F) at pH 8 leads to permanent in situ deposition of P-F resin moieties, which makes the strands less clearly visible. Modification of the P-F treated oxy-fibres by vinyl grafting leads to further masking of the fibre strands due to measurable vinyl deposition; in the SEM the fibre strands appear closely cemented together by the grafted-on vinyl polymer. On exposure to a standard microbiological degradative environment, damage to the fibre strands takes place in the order jute ≫ flat ≥ ramie; oxy-jute ≫ oxy-flax ≥ oxy-ramie. Each fibre system suffers little microbiological degradation, thereby showing high rot resistance, when the respective oxy-fibres are modified by P-F treatment and also by vinyl grafting in a subsequent step. At this stage the difference between the three fibre systems in rot resistance becomes slight. The SEM observations are supported by analysis of tensile strength (TS) and retention of TS after exposure to a standard microbiological degradative environment. © 1990 Chapman and Hall Ltd.

Journal of Materials Science

Scanning electron microscopic studies on some chemically modified bast fibres

Springer New York

Indian Medicinal Plants

Modern Methods of Plant Analysis / Moderne Methoden der Pflanzenanalyse

Journal of the American Pharmaceutical Association (Scientific ed.)

Pharmaceutical Botany. 7th ed. By Heber W. Youngken. The Blakiston Company, Philadelphia, 1951. xviii + 752pp. Illustrated. 16 × 23.5cm. Price $7

Comparative pharmacognosy of strychnos nux-vomica and strychnos potatorum stem barks

Journal	Pharmaceutical Biology
Publisher	Informa Healthcare
ISSN	1388-0209