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 13 of 13 for “"Nonadienal"”.
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Efficacy of Odor Scavengers in Reducing Odor Compounds in Water, Milk, and Soymilk
… of hexanal, 2-heptenal, 2-pentanone, and 2,4-nonadienal were determined in spring water, high temperature short time (HTST) 2% fat milk, and extended shelf life soymilk. The efficacy of odor scavenger's beta-cyclodextrin, D-sorbitol, and nylon 6 in removing these odors was also determined. The …
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Identification of key odorants in fresh-cut watermelon aroma and structure-odor relationships of cis,cis-3,6-nonadienal and ester analogs with cis,cis-3,6-nonadiene, cis-3-nonene and cis-6-nonene backbone structures
… GCO-H. These included cis-3-hexenal, cis,cis-3,6-nonadienal, cis-3-nonenal, cis-6-nonenal, trans-2-nonenal, cis-2-nonenal, trans,cis-2,6-nonadienal, trans,trans-2,4-nonadienal, and trans,trans,cis-2,4,6-nonatrienal. This finding is contrary to previous beliefs that alcohols are the main …
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Determination of Henry's Law Constants of Odorous Contaminants and Their Application to Human Perception
… earthy odor at 5-10 ng/L. trans-2, cis-6-Nonadienal is enzymatically synthesized from poly-unsaturated fatty acids by diatoms like Synura and has cucumber and fishy odors detectable at 10-40 ng/L levels. The new static headspace method uses standard glassware used in odor-analyses. 500 mL …
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Treatment of algae-induced tastes and odors by chlorine, chlorine dioxide and permanganate
… pure compounds, cis-3-hexenol and trans-2, cis-6-nonadienal, respectively, and for the removal of fishy odors associated with a culture of an alga, Synura petersenii. The effects of the oxidants on the pure compounds were assessed both by Flavor Profile Analysis (FPA) and gas chromatography/mass …
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Temperature Effects on Drinking Water Odor Perception
… and water temperature for geosmin, MIB, nonadienal, n-hexanal, free chlorine, and 1-butanol. The higher water temperature resulted in an increase in odor intensity for some, but not all, concentrations of geosmin, 2-methylisoborneol, <i>trans-2,</i> <i>cis-6-</i>nonadienal, n-hexanal, …
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Oxidation of Disinfection Byproducts and Algae-related Odorants by UV/H₂O₂
… 2-methylisoborneol, heptadienal, decadienal, and nonadienal, hexanal, and the two most prevalent classes of DBPs, trihalomethanes (THMs) and haloacetic acids (HAAs) were oxidized by UV photolysis alone and the UV/H₂O₂ process with 6 mg/L H₂O₂ and realistic ng/l to μg/L concentrations of the test …
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Investigation of Genetic and Environmental-Associated Variation of Flavor-Related Attributes in Bioparental and Natural Cucumber Populations and Their Correlation with Human Sensory
… and alcohols, hexenal 22.01%, and (E,Z)-2,6-nonadienal 9.43%. 5) Sensory correlation analysis revealed strong relationships between crispy texture and instrumental overall hardness (r = 0.78), and between (E,Z)-2,6-nonadienal and melon-like aroma (r = 0.79). Overall, this study integrated …
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C6 and C9 volatile compounds in 223 cucumbers (cucumis sativus L.) In Genome-Wide Association Studies (GWAS)
… (E)-2-nonenal (0.94-3.95 ppm), and (E,Z)-2,6-nonadienal (1.30-3.05 ppm). Out of 19 identified C6 and C9 compounds, a right-skewed distribution was observed for 12 of them. Aggregation Hierarchical Clustering (AHC) analysis using dendrograms progressively grouped the C6 and C9 compounds into …
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Analysis of potent odorants in spearmint oils
… OAVs were R-(-)-carvone, 1,8-cineole, (E,Z)-2,6-nonadienal, β-damascenone, and (3E,5Z)-1,3,5-undecatriene.
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Identification and characterization of odorous metabolites produced by selected freshwater algae
… produced more 2t,4c,7c-decatrienal than 2t,6c-nonadienal, and large fractions of the concentrations produced were retained within the algal cells. Various combinations of nutrient reduction, early algal-bloom within-reservoir treatment, and removal of algal cells prior to oxidation were …
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Macromolecular Reactions and Sensory Perception at the Air-Water-Human Interface
… aim was to understand when geosmin, 2-MIB, and nonadienal become detectable, employing two-resistance mass transfer theory to determine the concentration of odorants in bathroom air. Results showed that water temperature and odorant concentration in water play an important role. Next focus was …
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Lipoxygenase activity in menhaden (Brevoortia tyrannus) and its contribution to oxidation of omega-3 polyunsaturated fatty acids in menhaden oil
… namely 2-octenal, 1-octen-3-01, 2-nonenal, 2,6-nonadienal (E,Z), and 2,5-octadien-l-ol were among those identified in the undeodorized menhaden oil. The deooorized oil contained fewer total volatiles, and fewer aldehydes (6), ketones (1) and alcohols (8), but more long chain aliphatic compounds …
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Identification and characterization of potent odorants in selected beet root (Beta vulgaris) products
… 2-sec-butyl-3-methoxypyrazine, E, Z-2,6-nonadienal, and vanillin were of moderate odor potency.