Now showing items 371-380 of 387
Histidine transport into isolated animal cells
(Elsevier, 1968-09-03)
At pH values where it is predominantly without net charge, histidine in dilute solution divided its uptake by the Ehrlich cell between the Na+-independent L system and the Na+-requiring A system. As in every other case ...
Addition compounds of methyl substituted cyclic ethers with boron trifluoride
(Elsevier, 1961-04)
A manometric method was used to study the addition compounds of boron trifluoride with 2-methyltetrahydrofuran, 2,5-dimethyltetrahydrofuran, 2-methyltetrahydropyran and 2,6-dimethyltetrahydropyran. Physical characteristics ...
Interaction of heat-denatured HeLa cell DNA with synthetic and natural polysaccharides
(Wiley Subscription Services, Inc., A Wiley Company, 1968-11)
Heat-denatured DNA from HeLa cells interacts with natural as well as synthetic polysaccharides. Glucose does not inhibit the interaction nor will it produce it. Polysaccharides with a molecular weight of 10000 or greater ...
Bounded and patched solutions for boundary value problems
(American Institute of Chemical EngineersWiley Periodiocals, Inc., 1965-05)
The technique of bounding, that is of constructing general solutions for all ranges of the variables and parameters from solutions for a few limiting and special cases, is outlined and illustrated for problems in conduction ...
The destruction of indoleacetic acid. III. Relationships between peroxidase action and indoleacetic acid oxidation
(Elsevier, 1960-03)
The indoleacetic acid (IAA)-oxidizing enzyme preparation from Omphalia flavida exhibits peroxidase activity on pyrogallol with an optimum at pH 3.5-3.7, like that for the IAA-oxidizing activity. It shows no polyphenolase ...
Purification of pyridine for voltammetric studies : Effect of impurities
(Elsevier, 1967)
Purification of pyridine by zone fractional crystallization reduces the concentration of prewave-producing contaminant below polarographic detection limits, i.e., 0.01 mM. A qualitative test based on the stability of the ...
Seed germination studies II. Pathways for starch degradation in germinating pea seedlings
(Elsevier, 1966-07-06)
Amylase activity is present in extracts of the axis tissue of etiolated pea seedlings. Several lines of evidence establish that this starch-hydrolyzing activity is due to the presence of a [beta]-amylase ([alpha]-1,4-glucan ...