Importance relative des differentes fractions cellulaires dans la synthese hepatique des acides gras in vivo

AbstractThe synthesis of fatty acids in mitochondria, microsomes and supernatant of mice liver was studied after administration of glucose 14C or 3H, acetate 14C or 3H and pyruvate 14C.The results suggest that the cellular structures corresponding to the microsomes are the major site of fatty acid synthesis in the liver in vivo

Optimization methods and their use in low-energy electron-diffraction calculations

The speed of automatic optimization procedures used in surface structure determination by low-energy electron diffraction can be greatly enhanced by the use of linear approximations in the calculation of scattering amplitudes. It is shown how linear approximations can be used in the calculation of derivatives of intensities which are required in the least-squares optimization method. The derivatives with respect to structural and nonstructural parameters are calculated applying a combination of analytic and numerical methods in connection with approximations of the sum over lattice points in the angular momentum representation. Special cases for different structural and nonstructural parameters and simplifications for special geometries are discussed. The computational effort becomes nearly independent of the number of free parameters and enables the analysis of complex surface structures

John Pendry: His Contributions to the Development of LEED Surface Crystallography

In this paper we discuss the pivotal role played by Sir John Pendry in the development of Low Energy Electron Diffraction (LEED) during the past three decades; the earliest understanding on the physics of LEED to the development of sophisticated methods for the structural solution of complex surfaces

Tube choledochoureterostomy: A simple method for bile diversion

A technique of bile diversion by tube choledochoureterostomy has been devised for the purpose of studying the role of bile in the intestinal absorption of drugs. This method was used in six dogs. No technical difficulties or major complications developed, as are inevitable with alternative methods, including external fistula. © 1990 Informa UK Ltd All rights reserved: reproduction in whole or part not permitted