Now showing items 41-50 of 50
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 ...
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). ...
Human neutrophil protein kinase C: calcium-induced changes in the solubility of the enzyme do not always correlate with enzymatic activity
(Elsevier, 1988-07-29)
We hypothesized that calcium and 1,2-diacylglycerols stimulated human neutrophil (PMN) protein kinase C (EC 2.7.1.37) in a two-step mechanism. The proposed mechanism entails (1) increased insoluble protein kinase C activity ...
A practical large scale chemical synthesis of chiral glycines
(Elsevier, 1988)
(R)- and (S)-[2-2H]glycine of high chiral purity were synthesized in large quantities in [approximate] 40% overall yield from readily available starting materials via a totally chemical procedure. Reduction of either ...
Expert system for interpretation of the infrared spectra of environmental mixtures
(Elsevier, 1988)
A program for the identification of the principal components of mixtures through interpretation of the infrared mixture spectrum (IntIRpret) was developed. This program, which was developed as a preliminary screening tool ...
1,4-Additions of the highly functionalized copper reagents RCu(CN)ZnI [middle dot] 2 BFP3 to trisubstituted enones. A new BF3 promoted cyclization reaction
(Elsevier, 1988)
The new copper reagents RCu(CN)Zn I [middle dot] 2 BF3 1 containing various functional groups like esters, cyanides, chlorides or enoates react with [beta], [beta]'- disubstituted enones to afford the Michael adducts 4-7 ...