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Water transport through spherical lipid bilayers consisting of bovine red cell lipids has been studied. A new experimental method for the determination of volume flow induced by concentration gradient is described. Changes of the filtration coefficient indicate phase transition in membrane lipid taking place at 33-36 degrees C.

Microcalorimetry was used to show that transition-temperature ranges of phospho- and glycolipids of the brown marine alga Laminaria japonica were similar (from -62 to -47 degrees C up to 62-65 degrees C), except for monogalactosyldiacylglycerol, the low-temperature limit of which was shifted to -78 degrees C. As was shown by polarizing microscopy, the low-enthalpy peaks at temperatures of appro...

The interrelationships of serum lipids, that is, free cholesterol, esterified cholesterol, total cholesterol, lipid phosphorus, total lipids, neutral fats and Sf 10-20 molecules * ere determined in 91 women and 38 men past the age of 65 years. It was observed that all the serum lipids with the exception of neutral fats were statistically higher in the women. Furthermore, it was shown that the s...

151 Lateral mobility of plasma membrane lipids in Xenopus eggs: regional differences related to animal/vegetal polarity /. G. Bluemink*, W. J. A. G. Dictus, E. J. J. van Zoelen \ P. A. T. Tetteroo, L. G. J. Tertoolen 1 andS. W. deLaat. Hubrecht Laboratory, International Embryological Institute, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands. Department of Biology, V. U., Workgroup Histology an...