Now showing items 1-10 of 67
Vibrational analysis of crystalline diketopiperazine--II. Normal mode calculations
(Elsevier, 1984)
Based on our Raman and i.r. [1] data and assignments for DKP and five of its isotopic derivatives, we have refined an intramolecular force field in a non-redundant basis. This analysis shows that the cis peptide group may ...
Thermophysics of metal alkanoates IV. Heat capacities and thermodynamic properties of potassium 2-methylpropanoate
(Elsevier, 1984-02)
The molar heat capacity of potassium 2-methylpropanoate, (CH3)2CHCO2K, has been measured between 8 and 350 K by adiabatic calorimetry, and found to be normal. The corresponding thermodynamic functions have been calculated. ...
Effect of gravity on Brownian flocculation
(Elsevier, 1984-09)
In previous analyses of simultaneous Brownian and gravity-induced flocculation, it has been assumed that each mechanism contributes independently to the total flocculation rate. In this paper the rigorous problem of coupled ...
Transition dipole interaction in polypeptides: Ab initio calculation of transition dipole parameters
(Elsevier, 1984-06-15)
Ab initio calculations of dipole moment derivatives of a model system of N-methylacetamide hydrogen-bonded to two formamide molecules give values for amide I and amide II transition dipole moments consistent with those ...
Two-particle continuous-time random walks and binary reactions in disordered media
(Elsevier, 1984-02-10)
The relation between unary-(trappihg) and binary (mutual annihilation) reactions in disordered systems is studied in the framework of the continuous-time random walk. It is found that if the waiting-time distribution of ...
An investigation of Prussian Blue analogues by Mossbauer spectroscopy and magnetic susceptibility
(Elsevier, 1984)
The Mossbauer spectra and magnetic susceptibilities have been obtained for a series of Prussian Blue analogues of general formula MjA[MB(CN)6]k[middle dot]mH2O where MA and MB are transition metal ions, j and k vary with ...
Vibrational analysis of peptides, polypeptides, and proteins. XVIII. Conformational sensitivity of the Α-helix spectrum: Α I - and Α II -Poly( L -alanine)
(Wiley Subscription Services, Inc., A Wiley Company, 1984-05)
The Α II -helix (φ = −70.47°, Ψ = −35.75°) is a structure having the same n and h as the (standard) Α I -helix (φ = −57.37°, Ψ = −47.49°). Its conformational angles are commonly found in proteins. Using an improved ...
Thermophysics of metal alkanoates III. Heat capacities and thermodynamic properties of lithium and potassium propanoates
(Elsevier, 1984-01)
At 298.15 K, the values of Cp, m/R, Smo/R, {Hmo - Hmo(0)}/R, and {Gmo - Hmo(0)}/RT ar 15.58, 17.13, 2588.6 K, and -8.445 for CH3CH2CO2Li(cr), and 17.30, 21.16, 3134.0 K, and -10.647 for CH3CH2CO2K(cr). The energetics and ...
Effect of Crystallization of the Grain-Boundary Phase on the Thermal Diffusivity of a Sialon Ceramic
(Blackwell Publishing Ltd, 1984-05)
Electron diffraction analysis of charge redistribution model and structure of SeF6
(Elsevier, 1984-08)
The bond length of the octahedral molecule SeF6 was found to be rg(3[sigma]) = 1.685(2) A. Mean amplitudes of vibration, measured by diffraction, were within the experimental error of those calculated from spectral data ...