Content And Nature Of Carbon
Mostrando 25-30 de 30 artigos, teses e dissertações.
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25. Cholesterol depletion induces large scale domain segregation in living cell membranes
Local inhomogeneities in lipid composition play a crucial role in regulation of signal transduction and membrane traffic. Nevertheless, most evidence for microdomains in cells remains indirect, and the nature of membrane inhomogeneities has been difficult to characterize. We used lipid analogs and lipid-anchored proteins with varying fluidity preferences to
The National Academy of Sciences.
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26. In Situ Depletion of Pentachlorophenol from Contaminated Soil by Phanerochaete spp
The ability of two white rot fungi to deplete pentachlorophenol (PCP) from soil, which was contaminated with a commercial wood preservative, was examined in a field study. Inoculation of soil containing 250 to 400 μg of PCP g−1 with either Phanerochaete chrysosporium or P. sordida resulted in an overall decrease of 88 to 91% of PCP in the soil in 6.5 week
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27. Spirochaeta aurantia, a Pigmented, Facultatively Anaerobic Spirochete
A strain of Spirochaeta aurantia was isolated from mud by a procedure involving migration of the organisms through cellulose ester filter discs (0.3-μm pore diameter) onto the surface of culture plates. The helical cells measured 0.3 by 10 to 20 μm during exponential growth. Electron microscopy showed the presence of two subterminally inserted axial fibril
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28. Early Salt Stress Effects on the Changes in Chemical Composition in Leaves of Ice Plant and Arabidopsis. A Fourier Transform Infrared Spectroscopy Study1
A technique based on Fourier transform infrared (FT-IR) spectrometry was developed to detect the corresponding changes in chemical composition associated with the rapid changes in sodium and water content in 200 mm NaCl-stressed halophyte ice plants (Mesembryanthemum crystallinum). The changes in glycophyte Arabidopsis stressed with 50 mm NaCl were also exam
American Society of Plant Physiologists.
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29. Glycosphingolipid headgroup orientation in fluid phospholipid/cholesterol membranes: similarity for a range of glycolipid fatty acids.
Galactosyl ceramide (GalCer) was labeled for nuclear magnetic resonance (NMR) spectroscopy by replacement of a hydrogen atom at C6 of the galactose residue with deuterium. Wideline 2H NMR of [d1]GalCer permitted consideration of a mechanism traditionally entertained for cell surface recognition site modulation: that the nature of the fatty acid attached to t
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30. Membrane Lipid Biosynthesis in Acholeplasma laidlawii B: Elongation of Medium- and Long-Chain Exogenous Fatty Acids in Growing Cells
The chain elongation of a wide variety of exogenous fatty acids and the subsequent incorporation of the chain elongation products into the total membrane lipids of Acholeplasma laidlawii B were systematically studied. Within each chemical class of fatty acids examined, the extent of chain elongation increased with increases in chain length, reached a maximum