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Showing 1 to 20 of 332 for “"isomer"”.
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Faster isomer network generation
Isomer networks provide a mechanism to understand and interpret relationships between organic molecules with applications in medicinal chemistry and drug design. The extraction of isomer networks is a time and data-intensive computation. The contributions of this dissertation are a variety of …
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Investigating the possible cytoprotective effects of melatonin isomer against simulated ischemic injury
… injury. Recently, the presence of melatonin isomers has been identified in red wine, but whether or not these isomers confer any physiological properties is unknown. Aim: The aim of our study was to establish a cell culture model of simulated ischemia to study and compare the possible …
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Development of an approach towards the stereoselective synthesis of the cyclobutyl isomer of presqualene pyrophosphate
Restriction data tranferred 2014-07-01T11:13:39-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission
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Solving the crystallographic structure of the Cl2J construct and occupancy titration trials to quantitatively determine isomer ratio
… Occupancy titrations were conducted to quantify isomeric ratios of halogen bond versus hydrogen bond stabilized junctions (X- and H-isomers, respectively) within these crystals. The initial estimate of the isomer ratios of the Cl2J construct was 50/50 X-to-H-isomer from the initial electron …
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Synthesis of Single Isomer Trisubstituted Olefins from beta-chloro-alpha-iodo-alpha, beta-Unsaturated Esters and Alkynyl Esters
… with 9-alkyl-9-BBN to produce single isomer trisubstituted olefins using palladium-catalyzed Suzuki-Miyaura cross-coupling reaction. This methodology can be further expanded to introduce various alkyl groups at the beta-position. The mechanism is somewhat unusual as it involves two …
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Synthesis and Study of the 8-Tetracyclo(4.3.0.0(3,5).0(4,7))nonen-2-Yl Cation: A New Carbon(9)hydrogen(9) Cation Isomer
Made available in DSpace on 2014-12-10T23:01:40Z (GMT). No. of bitstreams: 1 7411969.pdf: 3770546 bytes, checksum: 4a05380f32cfb93c24105395ecf7aac3 (MD5) Previous issue date: 1973
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Anthracene, and its isomer, phenanthrene, and their derivatives; with a short investigation of the methods for the quantitative estimation of phenanthrene and anthracene
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1876
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Fermentation of vitamin K2 (menaquinone-7): Development of an optimal fermentation process to selectively enhance the production of the biologically significant all-trans isomer
… been recognised that MK-7 exists as geometric isomers, comprising the bioactive all-trans isomer and various cis forms of the compound, which lack or have considerably compromised biological significance. This is a salient aspect worthy of attention, as the effectiveness of MK-7 nutritional …
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Alterations in Lipid Metabolism in Mouse Tissues and Hepatic Cell Lines in Response to the Trans10,Cis12-18:2 Isomer of Conjugated Linoleic Acid
Conjugated linoleic acid (CLA) reduces adipose mass in several species. Studies were conducted to determine: 1) the effect of dietary trans10,cis12-CLA on growth, tissue fatty acid profile, mRNA expression for stearoyl-CoA desaturase (SCD) in adipose and liver, and mRNA expression for fatty acid …
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Concentrations of Conjugated Linoleic Acid Isomers in Human Plasma Reflect Intake of Dairy Products with Enhanced cis-9, trans-11 or tran-10, cis-12 Isomer Content
… agent, in the diet of humans. The t10, c12-CLA isomer, typically in trace amounts in bovine milk fat, also may benefit human health. Four cows received abomasal infusions of c9, t11-CLA or t10, c12-CLA to obtain milk fat used to prepare butter and yogurt with enhanced c9, t11-CLA or t10, c12-CLA …
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Oxidative addition of amino acids to iridium(I) metal centers
… to be mixtures of the meridional and facial isomers with the meridional isomer largely predominating. The meridional isomer was found to convert to the facial isomer when heated for several days at 100°C. In fact, a predominantly meridional mixture was found to convert to a predominantly …
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Chemistry and properties of perhydrobenzo[4.5.6]cholestanes
… 83 and the 4cx.,5cx. -i:4 '-isomer 85. The formation of 3p-hydroxy-4cx.,5cx. - dihydrobenzo [4.5.6] cholestan-5'(6'H)-one 80 when treating the lactone 79 with potassium hydroxide indicated an alternative reaction pathway to the 4cx.,5cx. -isomer. However, conditions were not …
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Spectroscopic Investigation of Isomers of the CO2-CO Dimer in the 4.27 Micron Region
… an OPO. The fundamental for both the C-bonded (isomer 1) and O-bonded (isomer 2) conformations for the dimer are observed for the natural isotopologue as well as for a 13CO2 and a 18O-13C-16O substituted form of the dimer. Combination bands involving the lowest frequency intermolecular mode …
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An investigation of structure activity relationships for aryl nitrenium stability and mutagenicity for amino polyaromatic hydrocarbons
… Ames Salmonella assay. Physical descriptors of isomer classification (based on ring size and shape) and isomer position of substitution were used in the statistical analysis. A strong correlation between mutagenicity, isomer classification, and stability was found (r²= 0.899 and p<0.001). This …
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Characterization of 2-methyl-8-quinolinolato gallium (Iii) chelates
… the first detailed evaluation in to the mer/fac isomerization of gallium (III) tris(2-methyl-8-quinolinolato) (2Meq3Ga) chelate in both solution and solid state, using 1H NMR and thermal studies. Unlike in Alq3, where the fac-isomer is not present in detectable amounts in a thin film, in 2Meq3Ga …
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Stereoisomerization of Hexacoordinate Sulfur and Tellurium
… to the first reported isolation of geometrical isomers of 12-S-6 sulfur, the trans- and cis-persulfuranes 2 and 3. The cis isomer is 2.0 (+OR-) 0.1 kcal/mol more favored in free energy than the all trans isomer in methylene chloride solution at 25(DEGREES)C. Calorimetry showed the trans-to-cis …
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On the Stereochemistry of Allylmetal-Aldehyde Condensations (Allyltrimethylsilane, Allyltributylstannane, Homoallylic Alcohols)
… investigated. A modest preference for the syn isomer 4 arising from a synclinal orientation of double bonds was observed with the Lewis acid catalyzed reaction of 3a. The selectivity for 4 was dependent on Lewis acid. Cyclization induced by fluoride ion resulted in a stereochemical reversal. …
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Solvent-Controlled Switch of Selectivity between sp[superscript]2 and s[superscript]p3 C-H Bond Activation by Platinum (II)
… that in each of the solvents used, a different isomer was produced from the complexation reaction. Reactions of L1 through L3 with potassium tetrachloroplatinate (II) in acetonitrile produced the sp[superscript]2 substituted isomer (1B-3B), while the same reaction performed in glacial acetic …
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