Acids are either “strong” or “weak.” This relates to the amount of free hydrogen ions in the solution of a given concentration. Thus, nitric acid is a strong acid, since all of the nitric-acid molecules are dissociated into active hydrogen ions and nitrate ions. However, acetic acid is a weak acid. A solution of acetic acid of the same molar concentration as nitric acid would have a very differ...

Cernik, A. A. (1970). Brit. J. industr. Med., 27, 40-42. Determination of lead chelated with ethylenediaminetetra-acetic acid in blood after precipitation of protein with perchloric acid. A method is described for the determination of lead in whole blood containing ethylenediaminetetra-acetic acid. Proteins were precipitated by 2-0 M perchloric acid. The ionized lead in the supernatant was chel...

drought tolerances of 55 indigenous strains of pseudomonas fluorescens were evaluated. to assess the tolerance rate of the strains to various levels of water deficit, their growth rate in nb medium containing concentrations of 40.587, 438.838 and 548.838 g of polyethylene glycol 6000 per liter of medium were utilized. water potentials of aforesaid levels were estimated as 0, - 10, - 20 and -30 ...

It is well known that /3-oxybutyric acid and substances capable of giving rise to this acid may undergo oxidation in the liver with formation of aceto-acetic acid and acetone. This has been most convincingly demonstrated by the striking experiments of Embden and his co-workers upon the perfusion of surviving livers with blood containing P-oxybutyric acid, etc. The reaction involved in this oxid...

Materials-The pigeon liver extract preparation and the substrates required for the synthesis of glycinamide ribotide have been described previously (l-4). Intestinal phosphatase, purified grade, was obtained from Pentex, Inc., Kankakee, Illinois. Adenosine-5’-phosphate was obtained from the Ernst Bischoff Company, Inc., Ivoryton, Connecticut. Adenosine-3’-phosphate was obtained from the Schwarz...

Materials-The pigeon liver extract preparation and the substrates required for the synthesis of glycinamide ribotide have been described previously (l-4). Intestinal phosphatase, purified grade, was obtained from Pentex, Inc., Kankakee, Illinois. Adenosine-5’-phosphate was obtained from the Ernst Bischoff Company, Inc., Ivoryton, Connecticut. Adenosine-3’-phosphate was obtained from the Schwarz...

phenolic and flavonoid compounds are secondary metabolites of plants which possess various activities such as anti-inflammatory, analgesic, anti-diabetes and anticancer effects. it has been established that these compounds can scavenge free radicals produced in the body. because of this ability, not only the plants containing phenolic and flavonoid compounds but also, the pure compounds are use...

An antiulcer polysaccharide fraction (BR-2) from Bupleurum falcatum L. was examined for its effect on the healing of chronic ulcers induced by acetic acid in rats. When BR-2 was administered orally to the rats, it was shown to be effective in the healing of acetic acid-induced chronic ulcer. This result suggests that the use of herbal prescriptions containing B. falcatum L. may prove useful for...

Cell membranes of Mycoplasma were isolated either by osmotic lysis or by ultrasonic disruption of the organisms. The membranes were dissolved in phenol-acetic acid-water (2:1:0.5, w/v/v), and membrane proteins were separated electrophoretically in polyacrylamide gels containing 5 m urea and 35% (v/v) acetic acid. The electrophoretic patterns of membrane proteins were highly specific for the dif...