The increasing complexity in particle science and technology requires the ability to deal with multidimensional property distributions. We present theoretical background for fractionations by transferring concepts known from one dimensional higher separations. Particles fluids are separated acting forces or velocities, which commonly induces external fields, e.g., gravitational, centrifugal ele...

The vast majority of commercial polyolefins are semi-crystalline materials. Depending on the chemical composition and tacticity, their melting temperatures range from ambient to temperatures exceeding 160 C. Polyolefins form various crystalline structures that can be investigated with microscopic, spectroscopic and scattering techniques. When a semi-crystalline polyolefin is dissolved in a solv...

In previous studies we found that a commercial cholesterol preparation obtained from the Wilson Laboratories had a high concentration of antirachitic provitamin. In the present studies we undertook to concentrate the provitamin fraction in cholesterol and to study its properties. 175 gm. of the commercial product, Cholesterol W, were dissolved in 1200 cc. of 10 per cent solution of sodium hydro...

LLE Review, Volume 105 26 Introduction In inertial fusion experiments, it is energetically advantageous to form the fuel into a solid shell before compression.1 Current cryogenic target experiments on OMEGA are being performed with pure deuterium (D2) as the fuel. 2 Future cryogenic target experiments will be performed with an equimolar solid mixture of deuterium and tritium (D-T). An equilibri...

Polyribosome sedimentation velocity centrifugation can be used to identify differential regulation of the translation of mRNAs. However, ultracentrifugation presents practical limitations on the number of sedimentation velocity gradients that can be run simultaneously. A method for sedimentation velocity analysis of polyribosomes is presented that is based on low-speed centrifugation of sucrose...