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Showing 1 to 20 of 89 for “"Unsaturation"”.
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Nutritional and PGR effects on lipid unsaturation, osmoregulant content, and relation to bermudagrass cold hardiness
Winter injury of bermudagrass (Cynodon spp.) continues to be a problem across the transition zone. In an attempt to delay or induce winter dormancy while maintaining cold hardiness, applications of seaweed extract (SWE) (0.54 kg ha-1), ethephon (16 L ha-1), Fe (1 kg ha-1), and N (49 kg ha-1) took …
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The structure of cyclic fatty acid monomers isolated from heated linseed oil and their effects on cultured aortic endothelial cells
… Using CFAM-oxazoline derivatives, location of unsaturation and ring structures were confirmed using gas chromatography-matrix isolation-Fourier transform infrared spectroscopy and gas chromatography-mass spectrometry. The CFAM were identified as 18-carbon diunsaturated structures containing …
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Soluble mineral content of soils using electrical conductivity
… soluble mineral content is made at the point of unsaturation. In the absence of clay, grain size does not affect determination of electrical conductivity for soils. Measurement of the electrical conductivity for a series of dilution ratios provides a reliable means of determining the correct …
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PVC stabilisers based on metal carboxylates
Hydroperoxides and olefinic unsaturation are formed rapidly in Polyvinyl chloride (PVC) as a consequence of mechanical shearing of the polymer chains during the processing operation. The concentration of these species in the polymer before processing is negligible compared with that produced …
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Part I, Preliminary investigation of one-hundred organic compounds as possible colorimetric reagents ; Part II, Solubility of the alkaline earth salts of some higher fatty acids
… salt of these acids increases slightly with unsaturation, but does not increase as the degree of unsaturation increases.
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THE PHOTOCHEMISTRY OF POLYENYL RADICALS AND ITS APPLICATION TO UHMWPE FOR USE IN ARTIFICIAL CARTILAGE
… spectrum above 200 nm causes the decay of diene unsaturations and allyl free radicals, a reduction in the overall amount of free radicals, and an increase in the degree of unsaturation of polyenyl free radicals. Upon longer photoirradiation times, polyenyl radicals were converted from lower to …
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Influence of plant growth regulators on turfgrass polar lipid composition, tolerance to drought and salinity stresses, and nutrient efficiency
… study indicates that ppe and FSE affected the unsaturation of polar lipid fatty acids and concentration of free sterols, which are major factors in changing cell membrane fluidity and permeability. The PGR-induced alteration of cell membrane lipid composition could be an adaptive process to …
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Adattamento e acclimatazione a diverse temperature di lieviti psicrofili obbligati e facoltativi e di lieviti mesofili. Studio della produzione di acidi grassi polinsaturi omega-3 e omega-6 per via fermentativa.
… to permanently cold environments. The extent of unsaturation of fatty acids was one major adaptive feature of the yeasts which colonize permanently cold ecosystems. Remarkable amounts of α-linolenic acid were found in obligate psychrophiles at the expenses of linoleic acid, whereas it was …
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The mechanisms of melt stabilisation of polyolefins
… iodide were formed together with olefinic unsaturation in the substrates during the melt processing of the polymers containing galvinoxyl, 4-hydroxy, 2,2,6, 6-tetra methyl piperidine oxyl and iodine respectively. No bonding of the melt stabilisers to the polymers was found to occur. Cupric …
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Identification of Tissue Distribution and Regulation of Bovine Stearoyl-Coa Desaturase by Hormones and Nutrients
… by insulin, fatty acids increasing in degree of unsaturation, and increasing concentrations of linoleic (18:2) acid. Subcutaneous AT was collected from Smith Valley Meats in Rich Creek, VA and used to prepare explants cultured in treatment media for 24 h. Treatments consisted of insulin at 0, 7, …
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Determining biological roles of four unique Vernicia fordii acyl-CoA Binding Proteins
… α-eleostearic acid, which has a high degree of unsaturation thus giving it properties as a drying oil. The identification of the biological components in tung is imperative to further the knowledge of its processes. Four unique tung acyl-CoA binding proteins, VfACBP3a, VfACBP3b, VfACBP4, and …
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The Role of Membrane Lipid Composition on Sarco(endo)plasmic Reticulum Calcium ATPase Function in Rat Soleus Muscle
… thermal stress. Both average chain length and unsaturation index were positively correlated with SERCA activity with and without thermal stress. These findings suggest that annular lipid composition is different than whole homogenate and its composition appears to be related to SERCA function.
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Correlation of physical and chemical properties of anhydride-cured epoxy resins with theoretical structure
… related to structure in terms of cyclic rings, unsaturation, substituted groups, etc. Measured properties were flexural strength, tangent modulus, toughness (area under the stress-strain curve), density, heat distortion temperature, and solvent sensitivity, as well as the retention of these …
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Induced pi-facial discrimination in the alkylation of chiral derivatives of glycine.
… only when the electrophiles contain a point of unsaturation. The reaction stereoselectivity ranged from 21 to 80% depending on the electronic nature of the electrophiles. It is proposed that a pi-stacking interaction between the aromatic group on the auxiliary and the unsaturated electrophiles …
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Synthesis and anti-HIV activity of [d4U]-spacer-[HI-236] bifinctional HIV-1 reverse transcriptase inhibitors
… challenges, with chemoselective distinction of unsaturation vialate introduction of the d4U double bond using Corey-Winter methodology as thehighlight.
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Isolation and Partial Characterization of the Toxic Substance from EREMOCARPUS SETIGERUS BENTH
… region that indicates the presence of unsaturation. Its infrared spectrum indicates the presence of a·saturated tertiary or a highly symmetrical secondary hydroxyl group and carbonyl group. The functional group tests also indicate the presence of ketone, ester, enol and isolated double …
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Estudo da copolimerização de estireno e cardanol em meios homogêneo e heterogêneo
… of changing materials hydrophobicity, and due to unsaturation, it is polymerizable. Besteti et al. (2011) showed the copolymer obtained by the reaction between styrene, a traditional monomer, and cardanol is promising as support for enzyme immobilization. Thus, this dissertation aims to study the …
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Alkenone-based evidence of Holocene slopewater cooling in the northwest Atlantic
… climate variability. Alkenone concentration and unsaturation records are presented from cores KNR140-39GGC, KNR140-51GGC, MD95-2028, MD95-2031, and MD95-2025 from the Blake Ridge (320N), Carolina Slope (330N), Fogo Seamount (42°N), Narwhal (440N), and Orphan Basin (500N) respectively. The …
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The Chemical and Mechanical Properties of Thiol Modified ABS
… correlations were obtained between the loss of unsaturation in the polybutadiene segment of the polymer and loss of impact resistance. The parameters were also correlated with decrease in tan δ at -80°C. Stabilisers containing the thiol group, notably 3,5-di-tert-butyl-4-hydroxybenzyl mercaptan …
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Study on dynamic behavior of ring-cavity quantum-cascade lasers with group velocity dispersion
… because of its effects on pulse spectrum in both unsaturation and saturation regime. To investigate the effect of group velocity dispersion in QCLs, both instability analysis and time-domain numerical simulation are presented in this thesis. A model that accounts for GVD effect and a background …
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