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pro vyhledávání: '"Krahl, A."'
Publikováno v:
The Journal of General Physiology
1. Methods suitable for the determination of diphosphothiamine (cocarboxylase) in eggs of Arbacia punctulata have been developed. Quantitative extraction of the cocarboxylase was effected by combining the use of thiamine hydrochloride in the extracti
Autor:
G. H. A. Clowes, M. E. Krahl
Publikováno v:
The Journal of General Physiology
The effects of 4,6-dinitro-o-cresol and 2,4,5-trichlorophenol on the respiration and cell division of fertilized eggs of Arbacia punctulata have been determined in the presence of each of a number of respiratory inhibitors. The experimental results o
Autor:
Bernhard J. Jandorf, M. E. Krahl
Publikováno v:
The Journal of General Physiology
1. The diphosphopyridine nucleotide content of Arbacia eggs has been measured manometrically and found to be approximately 250–500 micrograms per gm. wet weight of eggs, the value varying with individual egg samples and with the state of developmen
Autor:
M. E. Krahl, G. H. A. Clowes
Publikováno v:
Experimental Biology and Medicine. 34:567-569
Nitro and dinitrophenols have been shown to stimulate the metabolic processes of many types of cells1, 2 and to produce a reversible block to the cell division of fertilized eggs of a number of marine invertebrates. The analogous dihalo and trihaloph
Publikováno v:
Experimental Biology and Medicine. 45:719-721
ConclusionsThese experiments appear to indicate that Arbacia eggs contain a flavin-dinucleotide similar to, or identical with, that found in other tissues.1,4
Publikováno v:
The Journal of General Physiology
1. The hexokinase activity of homogenates of eggs and embryos of the sea urchin Arbacia punctulata has been measured. Expressed as micrograms glucose consumed at 20°C., per hour per milligram of protein the following values were obtained: unfertiliz
Autor:
M.E. Krahl
Publikováno v:
Biochimica et biophysica acta. 20(1)
1. 1. The 14 CO 2 produced from glucose-1- 14 C, glucose-2- 14 C, or glucose-6- 14 C by Arbacia eggs and embryos has been measured for a 2 hour period. The ratios of 14 CO 2 from glucose-2- 14 C to that from glucose-1- 14 C and from glucose-6- 14 C t
Publikováno v:
The Journal of General Physiology
1. The C14O2 production by Arbacia eggs and embryos from glucose-1-C14, glucose-2-C14, and glucose-6-C14 has been measured without and with dinitrocresol in the incubation medium. In the absence of the dinitrocresol, the C14O2 production from glucose
Autor:
M. E. Krahl, G. H. A. Clowes
Publikováno v:
Experimental Biology and Medicine. 33:477-478
It is known that the oxygen consumption of fertilized sea urchin eggs (Arbacia punctulata) can be markedly stimulated by the addition of suitable concentrations of nitro and dinitrophenols.1, 2 Stimulation of oxygen consumption in these cells can als
Autor:
M. E. Krahl, G. H. A. Clowes
Publikováno v:
Experimental Biology and Medicine. 34:565-566
In an extensive study of the biological effects of nitro and dinitrophenols1 it was found that extremely small concentrations of 2,4-dinitrothymol (1-hydroxy, 3-methyl, 6-isopropyl, 2,4-dinitro-benzene) blocked the cell division of fertilized sea urc