Now showing items 31-40 of 318
On the nature of the "non-saturable" migration of amino acids into Ehrlich cells and into rat jejunum
(Elsevier, 1966-03-14)
The so-called non-saturable uptake of [alpha]-amino acids by the Ehrlich cell, even though it occurs at a characteristically slow rate for various neutral amino acids (whether they are in the - or the -form) is nevertheless ...
Infrared internal reflectance spectroscopic determination of surface functional groups on carbon
(Elsevier, 1969-09)
An internal reflectance spectrophotometric technique for the direct study of the infrared spectrum of surface functional groups on carbon is presented. The applicability and limitations of this technique are discussed. The ...
Na+ and K+ electrochemical potential gradients and the transport of [alpha]-aminoisobutyric acid in Ehrlich ascites tumor cells
(Elsevier, 1969-11-25)
1. 1. The uptake of [alpha]-aminoisobutyric acid (AIB) was measured in Ehrlich ascites tumor cells which were treated by osmotic shock and cold incubation to elevate cell Na+ and lower K+. These cells were suspended in ...
Starch-gel investigations of the relationships between dehydrogenase proteins
(Elsevier, 1967-09-12)
A band which migrates, during starch-gel electrophoresis, to a far cathodal position, and catalyzes the reduction of nitro blue tetrazolium without the addition of substrate, has previously been found to also be associated ...
Analysis of the volatile combustion products of vinyl plastics
(Wiley Subscription Services, Inc., A Wiley Company, 1969-02)
The extensive use of plastics for insulation and building materials has created interest in the possible toxicity of their combustion products. Three poly(vinyl chloride) homopolymers, a vinyl chloride-vinyl acetate ...
Hydrogen ion buffers and enzymatic activity: Myosin B adenosinetriphosphatase
(Elsevier, 1968-10)
The production of hydrogen ions during the hydrolysis of ATP by myosin B and the consequent fall in pH can produce alterations in enzymatic activity directly, or by influencing Ca ion concentrations controlled by metal-chelate ...
Inhibition of protein synthesis in cell-free systems by homocitrullylamino adenosine
(Elsevier, 1963)
Homocitrullylamino adenosine inhibits the incorporation of [14C]amino acids into a hot acid-insoluble form in cell-free systems derived from Escherichia coli and rat liver. The concentration necessary for one-half maximal ...
Solubilization of water by dialkyl sodium sulfosuccinates in hydrocarbon solutions
(Elsevier, 1969-01)
The apparent solubilization of water in hydrocarbon solvents by the addition of 0.1% to 2.0% w/w di-(2-ethylhexyl) sodium sulfosuccinate (AOT) has been studied. In n-octane and n-decane, transitions of clear-turbid-clear-turbid ...
Modular solid-state unit for electrochemical studies
(Elsevier, 1968)
A relatively inexpensive unit based upon solid-state operational amplifiers is described; its modular design makes it an extremely versatile instrument for many electrochemical techniques, e.g., normal direct current ...
Circular dichroism of the “random” polypeptide chain
(Wiley Subscription Services, Inc., A Wiley Company, 1969-09)
The circular dichroism (CD) spectrum of an unordered polypeptide chain does not correspond, as has been assumed heretofore, to that of a charged chain such as poly- L -glutamic acid or poly- L -lysine. The latter have been ...