Now showing items 51-60 of 65
Selective oxidation of methane over vycor glass, quartz glass and various silica, magnesia and alumina surfaces
(Elsevier, 1988)
The reaction between methane and oxygen was investigated in empty Vycor glass and quartz tubes and over various silica compounds in powder form. In the temperature range of 893-993 K and with methane-to-oxygen ratios close ...
Purification of cytidine-triphosphate synthetase from rat liver, and demonstration of monomer, dimer and tetramer
(Elsevier, 1988)
Cytidine-triphosphate synthetase (UTP: ammonia ligase (ADP-forming), EC 6.3.4.2.) has been purified over 31 000-fold to homogeneity with 17% recovery from rat liver cytosol, using high-performance liquid chromatography ...
The effect of glycosidases on the survival of rat erythrocytes in circulation
(Elsevier, 1988-07-15)
Enzymic removal of sialyl groups from mammalian erythrocytes resulted in their rapid sequestration from circulation subsequent to autologous transfusion. It has been demonstrated by many investigators that the terminal ...
Fiber-optic biosensors based on fluorescence energy transfer
(Elsevier, 1988-02)
A new optical homogeneous biochemical method for the assay of glucose has been developed, based on fluorescence energy transfer between a glucose analog, dextran labeled with fluorescein isothiocyanate (FITC--dextran), and ...
Age-related modifications in rat cardiac phosphoglycerate kinase. Rejuvenation of the old enzyme by unfolding-refolding
(Elsevier, 1988-06-29)
The occurrence of age-related modifications in functional and structural properties of several enzymes has been documented; however, the molecular basis of this phenomenon is still mostly unexplained. In the present work ...
Effects of hole stress concentration and its mitigation on the tensile strength of sheet moulding compound (SMC-R50) composites
(Elsevier, 1988-07)
The hole stress concentration effects on the tensile strength of SMC-R50 sheet moulding compound composites were studied with consideration being given to both centric and eccentric hole locations. It is shown that the ...
The thermodynamic properties of cesium metaborate CsBO2 from 5 to 1000 K
(Elsevier, 1988-06-15)
The low-temperature heat capacities of cesium metaborate were measured by adiabatic calorimetry from 9 to 346 K. High-temperature enthalpy increments of CsBO2 were measured by drop calorimetry from 414 to 671 K. In addition, ...
Assignment of the chemical shift values of N-trityl -homoserine lactone
(Elsevier, 1988)
This paper reports the correct assignment of all chemical shift values of N-trityl -homoserine lactone based on the 1H-nmr spectra of N-trityl-2S, 3R-[3-2H]- and 2S, 3S-[2,3-2H2]homoserine lactone.
Transmetallation of n-(trialkylstannyl)methylimines. A new method for the generation and cycloaddition of 2-azaallyl anions.
(Elsevier, 1988)
Transmetallation of imines 1 at -78[deg] with RLi provided 2-azaallyl anions 2, which readily undergo cycloaddition with olefinic anionophiles, providing pyrrolidines. Of particular note is the generation of unstabilized ...
Hydrogen peroxide oxidation catalyzed by chloride-depleted thylakoid membranes
(Elsevier, 1988-11-16)
Chloride-depleted thylakoid membranes which are unable to catalyze the oxidation of water can nonetheless catalyze the oxidation of hydrogen peroxide (Kelly, P. and Izawa, S. (1978) Biochim. Biophys. Acta 502, 198-210). ...