The membrane lipid and fatty acid compositions of red blood cells from a paramyotonia patient were investigated. Cholesterol and total phospholipid contents in paramyotonia were not different from control. Only the sphingomyelin content was lower, and thus the molar ratio of phosphatidylcholine/sphingomyelin was higher than normal. The major abnormality concerned the fatty acid pattern. In all ...

Two-wave and four-wave mixing in photorefractive media with saturable gain and saturable absorption is analyzed. Solutions to wave equations are found in terms of quadratures and implicitly given functions. Different models of saturation are compared. It is found that for weak couplings energy transfer between waves is less effective in the strong unsaturated regime as compared to the saturated...

This study investigates the effects of repeated applications non-ionic soil surfactant H2Flo (ICL-SF Inc., Israel) on water content, hydraulic conductivity, nutrient distribution, and organic carbon fractions (OCFs) in non-hydrophobic loamy sand soils under subsurface drip irrigation. Our results indicate that treatment reduces both saturated unsaturated conductivity while promoting uniform ...

Dietary lipid composition profoundly influences the hibernation pattern of the chipmunk Eutamias amoenus. The object of the present study was to investigate whether these physiological changes following feeding of saturated and unsaturated lipids were associated by compositional changes of fatty acids of tissues and membranes. Animals were fed with rodent chow (control diet), rodent chow with 1...

We investigated the effect of different flow conditions on the transport of bacteriophage phiX174 in Memphis aquifer sand. Virus transport associated with a wetting front moving into an initially unsaturated horizontal sand column was experimentally compared with that observed under steady-state saturated vertical flow. Results obtained by sectioning the sand columns showthattotal (retained and...

The cls mutation conferring a defect in cardiolipin synthesis (Pluschke, G., Hirota, Y., and Overath, P. (1978) d BioC. Chem 253, 5048-5055) has been introduced into an Escherichia coli strain defective in unsaturated fatty acid synthesis in order to study the effect of changes in polar head group composition on the ordered c, fluid phase transition f the membrane phospholipids. The defect in c...

This study aims to explore the mechanisms governing the transport and retention kinetics of TiO(2) nanoparticle aggregates (NPAs) in flow-through columns of packed sand, particularly under unsaturated conditions. The study was carried out at different pHs (2.6, 7.1, and 9.6) and ionic strengths (ISs) (1.0, 10, and 50 mM). A two-site kinetic attachment model was used to describe transport behavi...

Numerous investigations have led to the point at which refined enzyme systems may be used to study the biosynthesis of saturated fatty acids (2, 3). The biosynthesis of unsaturated fatty acids has not been so thoroughly elucidated. Formation of unsaturated fatty acids has been observed experimentally in viva (4-9) and in vitro (10, 11) but several of these studies showed that incorporated radio...

The process called biohydrogenation occurs mainly in ruminant animals and during it, unsaturated fatty acids, and particularly poly-unsaturated ones (linoleic and linolenic) coverts to a saturated form of stearic acid. For many years, the beneficial effects of biohydrogenation intermediate fatty acids like cis-9 trans-11 linoleic acid, the main natural isomer of conjugated linoleic acids (CLA),...