Studies on Organic Microanalysis. XXV

Comparative Studies on Respiration. Xxv. Tiie Action of Chloroform on the Oxidation of Some Organic Acids. By

In a previous paper (1) it has been shown that Ulva which has been killed by drying and subsequently treated with H20~ and Fe2(SO4)s may be made to produce COs after the manner of the living organism, and that the rate of production of COs may be affected by the presence of chloroform. In order to throw some light on the mechanism of these reactions experiments similar to those described in the...

The Present Status of Organic Elemental Microanalysis

The influence of instrumental analysis, i.e., physicochemical methods, has become increasingly important in organic chemistry, but organic elemental microanalysis is by no means an obsolete field. On the contrary, with the development of new methods, the organic chemist obtains the results that he needs for a first orientation on a compound, more quickly and more reliably than ever before. Toda...

Studies on echinococcosis. XXV. Anthelmintic action of drugs on larval Echinococcus multilocularis in vitro.

Studies on monoamine oxidase. (Report XXV). Effects of alcohols on beef liver mitochondrial monoamine oxidase.

The effects of alcohols on MAO activity in beef and rat liver mitochondria were studied. MAO activity was determined manometrically using tyramine (1× 10-2 M) as substrate and expressed as O2 uptake in 60 min. At concentrations of 0.1 to 10%, methanol and ethanol increased MAO activity in both beef and rat liver mitochondria. Activation of MAO by ethanol was reversib...

Oxidative phosphorylation in fractionated bacterial systems. XXV. Studies on the involvement of metal in Mycobacterium phlei.

The involvement of metal in oxidation and coupled phosphorylation by cell-free preparations of Mycobacterium phlei was examined. The oxidation of succinate was inhibited by metal-chelating agents, but with /3-hydroxybutyrate, chelating agents exhibited an uncoupling effect. The site of inhibition was found to be between the flavoprotein and the cytochrome b regions of the electron transport cha...