Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 24 for “"butanone"”.
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The Sensory and Analytical Analyses of Nonfat Milk Formulations: Stability to Light Oxidation and Pasteurization
… the concentrations of the volatile compounds (2-butanone, 2-pentanone, acetaldehyde, diacetyl, hexanal, methyl sulfide) found in the two components. Pasteurized unoxidized skimmed milk had measurable levels of 2-butanone, acetaldehyde, and diacetyl. Pasteurization of skimmed milk increased …
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Non-Canonical Axonal Insulin Receptor Signaling Drives Aversive Olfactory Learning
… and availably of food. The volatile chemical butanone is a common product of bacterial metabolism, and therefore a bacterial odor that is attractive to worms. However, exposing C. elegans to butanone vapor while depriving them of food can suppress this attraction. C. elegans senses butanone …
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Fluorinated amino acid derivatives
A new approach in the syntheses of 3-bromo-2-butanone and 2-bromo-3-fluorobutane has been developed. All attempts to alkylate the sodium salt of diethyl malonate, ethyl acetoacetate, or diethyl acetamidomalonate with 2-bromo-3-fluorobutane failed. New phosphonoacetates, tert-butyl and benzyl …
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Mechanisms of Olfactory Plasticity in Caenorhabditis Elegans
… paradigm in which animals lose attraction to butanone after it is paired with starvation, I here describe neuronal and molecular mechanisms that are associated with and necessary for plasticity in C. elegans. In Chapter 2, I report my findings on circuit mechanisms of butanone adaptation, …
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A study of carbonyl formation within an innovative indoor air pollution abatement system
… were formaldehyde, acetaldehyde, acetone, and butanone. Statistical analyses of the data indicated that the pre-prototype unit of the air cleaning system caused increased levels of acetaldehyde and butanone, and possibly formaldehyde, in the airstream when challenged with 2-butanol. Acetone …
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Study of 4(E)-Trans-6, 7-Epoxy-2, 2-Dimethyl-4-Decen-3-One
… synthesized by reacting 1-bromo-3,3-dimethyl-2-butanone with triphenylphosphine. Then the reactive sities will be tested using phenyllithium.
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Intramolecular carbenoid insertion : reactions of [alpha] -diazoketones derived from benzothienyl, pyrolyl and indolyl alkanoic acids with rhodium (II) acetate
… decomposition of I-diazo-4-(3-benzothienyl)-2-butanone (146) and 1-diazo-4-(3benzothienyl)- 2-butanone (152) allow for the isolation of 1,2,3a,3b-tetrahydro-3Hbenzo[ b]cyclopenta[1,3]cyclopropa- [1 ,2-d]thiophen-3-one (147) and 1,2,3a,3btetrahydro- …
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A Comparative Study of Sensory Neuron Synaptic Activity and the Role of Presynaptic Diversity, Specificity, and Regulation in Caenorhabitis Elegans
… kinase C epsilon) modulate AWC<sup>ON</sup> butanone olfactory preference. We find that pkc-1 functions in AWC<sup>ON</sup> downstream of presynaptic calcium influx to modulate eat-4 dependent glutamate release and a second form of AWC<sup>ON</sup> output that is important for specifying …
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Antidiabetic activity of Schkuhria pinnata – Biological screening, PK analysis and mode of action
… aqueous extract was more significant overall. A butanone/pentane extract prepared for possible commercialization purposes was also shown to be active in vitro. To establish antidiabetic activity, the aqueous freeze dried extract, butanone/pentane extract and the enriched compound 1 fraction were …
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REDUCTIVE ELIMINATION OF (DPMS)PTIV COMPLEXES DERIVED FROM ISOMERIC 2-BUTENEs AND 2-BUTYNE (DPMS=DI(2-PYRIDYL)METHANE SULFONATE)
… of the two competing mechanisms. Platinum(IV) η1-butanone complex was synthesized and characterized, which was found to undergo different types of elimination reaction to give a series of butane derivatives as products.
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Total electron scattering cross sections of molecules containing H, B, C, N, O, F, Si, P, S, and Cl in the energy range 0.1- 6.0 keV.
… 0.1-6.0 keV. The TCS of important biomolecules 2-Butanone Formamide, Trimethylamine, Aniline, Pyrimidine, Anthracene, five nucleic bases (adenine, cytosine, guanine, thymine and uracil) , Phosphoric acid, sugar substitute (Tetrahydrofuran, Furan, Tetrahydropyran, 3-hydroxytetrahydrofuran, …
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Structure and reactivity of diol host-guest compounds
… by X-ray diffraction. The guests were 2-butanone, 4-vinylpyridine, 4-methylpyridine and 2-methylpyridine. The host to guest ratios were determined by microanalysis and density measurements. The change of the overall host lattice structure upon guest release was studied by X-ray powder …
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Separation of 2,3-Butylene Glycol and Acetoin in Fermented Cheese Whey Permeate by Liquid Column Chromatography
… Due to their similarities, acetoin (2-hydroxy-3-butanone) and 2,3-butanediol have been difficult to separate in the past. Studies showed that these compounds could be easily separated using the chromatographic procedure developed in this research. The procedure involves "pre-washing" the column …
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An investigation into the association between cytochrome P450 and glutathione S-transferase detoxification enzyme polymorphisms and human oral squamous cell carcinoma
… of 4-(methylnitrosamino)-1-(3 pyridyl)-1-butanone.
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Controlling Light Oxidation Flavor in Omega-3 Fatty Acid Enriched 2% Milk by Packaging Films
… only) shows relatively larger peak areas for 2-butanone on day 14, compared to other milk samples, suggesting antioxidants in the fish oil can prevent light oxidation. Overall, packaging that provides a complete light block is still the best way to prevent light-oxidized flavor in milk.
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Kinetics of Methyl Ketone and Levulinic Acid Oxidative Scission Over Supported Vanadium Oxide Catalysts
… oxidative scission of methyl ketones (e.g., 2-butanone and 2-pentanone). The impacts of vanadium oxide structures, metal oxide substrates, and methyl ketone molecular structures on both selectivity and reactivity of the oxidative scission were investigated in order to understand the origins of …
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Crystal engineering and sorption studies of cyclotriveratrylene and C-methylcalix[4]resorcinarene solvates
… crystallised from acetonitrile (1) and 2-butanone (4) are shown to be nearly isostructural, resulting in the formation of dimeric capsules, while the compound which crystallised from chloroform (3) results in the formation of layers of cyclotriveratrylene molecules separated by layers of …
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The quorum-sensing regulation of Vibrio fischeri : novel components of the autoinducer/LuxR regulatory circuit
… of ribulose 5-phosphate to 3,4-dihydroxy-2- butanone 4-phosphate, a precursor for the xylene ring of riboflavin; AcfA is believed to be a pilus subunit; and the functions of QsrP and QsrV are unknown at this time. A qsrP mutant was reduced in its ability to colonize its symbiotic partner, …
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Studies in asymmetric synthesis: I. the asymmetric α-alkylation of N,N-dimethylhydrazones II. the asymmetric aldol-Tishchenko reaction of (S)-tert-butanesulfinyl imines for the introduction of 2, 3, 4 and 5 new chiral centres in one pot
… in one pot. Cyclopentanone, cycloheptanone and 2-butanone derived 3-amino-1,5-diol products were isolated in excellent diastereoselectivity (up to >98:2 dr) via a tandem double aldol-Tishchenko reaction. A broad range of meta- and para-substituted benzaldehydes including a number of challenging …
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