Chemical Studies on the Active-Carbon

Theoretical studies on the chemical activation of carbon dioxide

Studies on the Chemical Constituents of

Azadirachta indica A. Juss (Meliaceae) is indige­ nous to the Indo-Pakistan subcontinent and its various parts are reputed as therapeutic agents [2, 3]. Some of the constituents of neem have recently been shown to possess significant pesticidal activity [4]. More recent studies undertaken on the fresh, un­ dried, uncrushed, ripe and unripe, fruits and the un­ dried leaves of the plant by Siddiq...

Chemical Studies on the Adrenal Cortex

In Paper II of this series (1) we described the isolation from adrenal extracts of four crystalline, nitrogen-free compounds, which were found to be physiologically inactive when tested on the adrenalectomized dog. Three of these compounds, besides others not encountered by us, have meanwhile been obtained independently by Reichstein (2) ;I the fourth is apparently identical with the substance ...

Studies on the Chemical Diagnosis of Pellagra

Since the demonstration that nicotinamide is the pellagra-preventing factor (1), attempts have been made to analyze this substance in blood and urine as a measure of nicotinic acid nutrition. Chemical methods and biological methods, to be considered subsequently, have been used. The chemical methods have been based, most commonly, upon the development of colored products by the reaction of vari...

Studies on the chemical modification of trypsin.

Many effects of dibenamine (Â /V-dibenzyl-/?chloroethylamine) on physiological systems have been reviewed by Graham1 and Nickerson2. However their effect on enzyme activity was not reported till Beddoe and Smith 3 observed that dibenamine also reacts with acetylcholinesterase under rather specific conditions in an irreversible manner to give an in­ active modified enzyme. The inhibiting compoun...