Qualitative Chemical Analysis (Briscoe, Herman T.)

Simplified qualitative chemical analysis for urinary calculi.

OXALATE Stone powder (2-3 mg) is moistened on an ordinary glass slide with two to three drops of 20% nitric acid and is slowly heated over a small flame to dryness and then for a further 5-10 seconds but without charring. The following results may be noticed: (a) formation of a conspicuous reddish-brown froth indicating ammonium urate; (b) formation ofa flat purplish-brown layer, evidence of ur...

Herman Neuckermans

Herman Beerman.

4 Herman

Introduction In one important respect confronting the experts on a subject like terrorism is more difficult than on issues like fluoridation or nuclear power. On the latter topics, the public’s health and safety are clearly and directly at stake, its interest in rational inquiry is evident, and antior non-establishment experts or spokespersons, while at a serious disadvantage in reaching the pu...

Qualitative analysis of an autocatalytic chemical reaction model with decay

In this paper, we revisit a reaction–diffusion autocatalytic chemical reaction model with decay. For higher-order reactions, we prove that the system possesses at least two positive steady-state solutions; hence, it has bistable dynamics similar to the system without decay. For the linear reaction, we determine the necessary and sufficient condition to ensure the existence of a solution. Moreov...