Now showing items 21-30 of 50
Dipole derivatives and infrared intensities of the ester group. An ab initio and force field study of methyl acetate
(Elsevier, 1988-10-31)
Dipole derivatives have been obtained (using both 3-21G and 6-31G basis sets) for methyl acetate. Using a force field refined from experimental data on methyl acetate and its deuterated derivatives, infrared intensities ...
Thermodynamics of uranium intermetallic compounds II. Heat capacity of UPd3 from 8 to 850 K
(Elsevier, 1988-07)
The heat capacity (from 8 to 350 K) of UPd3 by adiabatic calorimetry and (from 400 to 900 K) by enthalpy-increment drop calorimetry has been measured and the thermodynamic properties at 298.15 K have been evaluated as ...
Atomic physicochemical parameters for three dimensional structure directed quantitative structure-activity relationships III: Modeling hydrophobic interactions
(John Wiley & Sons, Inc., 1988-01)
In an earlier article 8 the need was demonstrated for atomic physicochemical properties for three dimensional structure directed quantitative structure-activity relationships, and it was shown how atomic parameters can ...
Cd2+ activation of -threonine dehydrogenase from Escherichia coli K-12
(Elsevier, 1988-11-23)
Homogeneous preparations of -threonine dehydrogenase (-threonine: NAD+ oxidoreductase, EC 1.1.1.103) from Escherichia coli K-12, after having been dialyzed against buffers containing Chelex-100 resin, have a basal level ...
A new mild oxidation of amines to aldehydes and ketones. Part II
(Elsevier, 1988)
The silylamines 1, after conversion into their lithium or zinc salts, were readily oxidized by dry air under very mild conditions (-60[deg] C to -20[deg] C; 5-45 min.) into the corresponding aldehydes or ketones 2 in good ...
Vibrational spectroscopy of L -valyl-glycyl-glycine, a parallel-chain Β-structure This is paper number 38 in a series on “Vibrational Analysis of Peptides, Polypeptides, and Proteins,” of which paper number 37 is Ref. 27.
(Wiley Subscription Services, Inc., A Wiley Company, 1988-06)
Bands in the ir and Raman spectra of L -valyl-glycyl-glycine (VGG) and VGG-ND have been assigned on the basis of a normal mode analysis of the known parallel-chain Β-structure of this tripeptide. Amide I, II, III, and V ...
Techniques for preparing hydrogel membrane capsules
(Kluwer Academic Publishers; Science & Technology Letters ; Springer Science+Business Media, 1988-12)
Techniques for preparing four kinds of hydrogel membrane capsules are described. In the present process the material being encapsulated remains in its original environment in an aqueous suspension. Also, capsule characteristics ...
2-Cyanoethylzinc iodide: A new reagent with reactivity umpolung
(Elsevier, 1988)
2-Cyanoethylzinc iodide 1 generated in over 90% yield from 3-iodopropionitrile and zinc in THF can be transmetallated to the copper and titanium derivatives 3 and 4 which react in good yields, respectively, with acyl ...
Vibrational analysis of cyclo(-Ala--Ala) in two crystalline forms. Effect of structure on peptide group and CH modes
(Elsevier, 1988)
Cyclo(-Ala--Ala) has been found by X-ray diffraction to crystallize in two forms with different hydrogen bond patterns and strengths and different conformations of the C[alpha]H[alpha]C[beta]H3 group. We have done a ...
The microwave spectrum and structure of krypton--phosphorus trifluoride
(Elsevier, 1988-10-15)
The rotational spectrum of the weak complex between krypton and phosphorus trifluoride has been observed using a Fourier transform microwave spectrometer with a pulsed supersonic nozzle molecular beam source. The complex ...