Zobrazeno 1 - 10
of 31
pro vyhledávání: '"D. W. Kupke"'
Autor:
L A, Marky, D W, Kupke
Publikováno v:
Methods in enzymology. 323
Autor:
Jesse W. Beams, D. W. Kupke
Publikováno v:
Proceedings of the National Academy of Sciences. 74:4430-4433
The magnetic suspension densimeter-viscometer has been modified so that the variations of viscosity and density in solutions undergoing change are determined continuously as a function of time. The changes in values for both of these properties are a
Autor:
Jesse W. Beams, D. W. Kupke
Publikováno v:
Proceedings of the National Academy of Sciences. 74:1993-1996
The solid-like behavior of turnip yellow mosaic virus solutions following the extrusion of viral RNA in alkali was observed with a torsion-fiber balance developed for the purpose. This method provided a direct measurement of the yield stresses requir
Autor:
G. T. Gillies, D. W. Kupke
Publikováno v:
Review of Scientific Instruments. 59:307-313
An improved version of our magnetic suspension densimeter has been developed for use with samples of aqueous systems as small as 100 μl. The instrument’s sensitivity to a change in density of the solution under test (measured as a voltage shift) i
Autor:
P. E. Hexner, R. F. Bunting, D. McIntyre, D. W. Kupke, F. N. Weber, H. G. Kim, L. C. Williams
Publikováno v:
Journal of Polymer Science. 62:S136-S140
Publikováno v:
Cancer. 4:410-415
Publikováno v:
Proceedings of the National Academy of Sciences. 63:548-555
The magnetic densimeter has been employed to measure the densities and apparent specific volumes of certain proteins in aqueous solutions as a function of pressure. The method gave values in satisfactory agreement with those found in the literature f
Publikováno v:
Proceedings of the National Academy of Sciences. 71:3866-3868
Sedimentation equilibrium was achieved with turnip yellow mosaic virus at low speeds (600 rpm) in a magnetic ultracentrifuge. The experiments were carried out in the newly installed constant-speed rotor, equipped with automatic control and an electro
Publikováno v:
Proceedings of the National Academy of Sciences. 70:3785-3787
The magnetic suspension balance is used for the measurement of very small osmotic pressures. The apparatus is essentially the same as that previously used for the measurement of the density and viscosity of protein solutions except that the magnetica
Autor:
Judith L. Huntington, D. W. Kupke
Publikováno v:
Science. 140:49-51
The increase in the ratio [chlorophyll a]/[chlorophyll b] which occurs in expanding bean leaves in the dark, is a result of chlorophyll a formation with a concomitant loss in chlorophyll b. The analytical methods for assay of these pigments were exam