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 16 of 16 for “"Nonanal"”.
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Flavor chemistry of lemon-lime carbonated beverages
… 2,3-dehydro-1,8-cineole, 1,8-cineole, octanal, nonanal, decanal, linalool, borneol, isoborneol, neral, geranial, nerol, geraniol and p-cresol. Benzoic acid was quantified separately by HPLC using an external standardization method. Concentrations of the all compounds, except neral, differed …
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Volatile Compounds in Vine Tea (Ampelopsis grossedentata)
… (hexanal, (E)-2-hexenal, (Z)-4-heptenal, nonanal, (E,Z)-2,4-heptadienal, (E,E)-2,4-heptadienal, and β-cyclocitral), two ketones (6-methyl-5-hepten-2-one and β-ionone), and one alcohol (1-penten-3-ol) were identified in more than 90% of all vine tea infusions (n=54). Results of this study …
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Characterization of Fava Bean Hydrolysates for Future Use in Protein Enriched Beverages
… compounds, including aldehydes (hexanal, nonanal), alcohols (1-octen-3-ol), and furans (2-pentylfuran). Hexanal was present in all samples, while 2-pentylfuran produced the most prominent peak, with green bean, nutty, and vegetable-like flavor
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Physicochemical and flavor characterization of Tupelo honey
… two assessors were phenylacetaldehye (rosy) and nonanal (citrus). Further analysis was carried out on honey 5 from the 2013 and 2014 seasons due to its consistently high Tupelo pollen content across seasons and the inability of sensory panelists to distinguish between the two samples. The most …
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Evaluation of Initial Flavor Fade in Fresh Roasted Peanuts using Gas Chromatography-Flame Ionization Detection, Gas Chromatography-Olfactometry, Sensory Analysis, and Chemosensory Techniques
… major by-products of the oxidation reaction are nonanal, hexanal, octanal, and decanal. These chemicals are associated with cardboardy, painty, and oxidized flavors associated with flavor fade. The carbonyl-amine reaction yields a variety of pyrazines with positive flavor attributes. Initial …
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An in-depth analysis of beer flavor and its impact on consumer refreshing perception
… (acetaldehyde, isovaleric aldehyde, hexanal, nonanal) were common volatiles in three beers, which might associate with acceptance and preference by consumers. The significance derived from this thesis research revealed that flavor type and alcohol level significantly impact perceived …
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Profiling and putative aroma biomarker identification for flavor in potatoes using a trained sensory panel and HS-SPME GC-MS
… a positive flavor attribute, are aldehydes 1-nonanal, benzaldehyde, (E)-2-heptenal, pentanal, 2-phenylacetaldehyde, the alcohol (Z)-2-methyl-2-penten-1-ol, and 5-methyl-2-hexanone, a ketone. Other positive flavor attributes, sweet and potato-like flavor, are related to …
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An in-depth analysis of beer flavor and its impact on consumer refreshing perception
… (acetaldehyde, isovaleric aldehyde, hexanal, nonanal) were common volatiles in three beers, which might associate with acceptance and preference by consumers. The significance derived from this thesis research revealed that flavor type and alcohol level significantly impact perceived …
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Synthesis, Structure, and Catalytic Activity of Bimetallic Rhodium Complexes in the Hydroformylation and Allylic Oxidation of Alkenes
… C4 (R = CF3). There is equal amount of both nonanal and branched aldehydes with C4, indicating the rate of isomerisation is equal to the rate of aldehyde formation from the iso-octenes. Homoleptic (C5 – C7) and mixed ligand heteroleptic (C8 – C11) dirhodium complexes were evaluated as …
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Mönsteranalys av inomhusluft. Undersökning av luftkvaliteten i sjuka hus med flytspackelproblem
… var bensaldehyd, oktanal, heptanal, dekanal, nonanal, 2-etylhexanol, metylheptenon, oktan. Studien visade vidare att andelen kritiska ämnen av TVOC var signifikant högre i inomhusluften i lägenheter med kaseinhaltigt flytspackel. De två enskilda VOC-ämnena bensaldehyd och 2-etylhexanol kunde …
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Synthesis and application of rhodium(I) Fischer carbene complexes
… selectivity toward the formation of the linear nonanal, was observed. These results were found to be comparable to results reported for rhodium(I) N-heterocyclic carbene complexes. A mercury-drop test was done to exclude a heterogeneous catalytic mode of action. Finally, the stability of the …
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Responses of Sitotroga cerealella to semiochemicals and physical characteristics of corn kernels
… compostos foram identificados, os quais são: n-nonanal, n-decanal e acetona geranil. Portanto, S. cerealella têm preferência por algumas características dos grãos na seleção do seu hospedeiro para alimentação, oviposição e comunicação sexual. Assim, essas informações podem ser utilizadas como …
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Identification and characterization of potent odorants responsible for typical and storage-induced flavors of cola-flavored carbonated beverages
… to the overall aroma of cola, followed by nonanal, (S)-(+)-linalool, decanal, and (R)-(+)-limonene. The aroma reconstitution model was then constructed based on quantification data by adding twenty high purity standards to an aqueous sucrose-phosphoric acid solution. Headspace-solid phase …
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Identification and characterization of potent odorants in selected beet root (Beta vulgaris) products
… beets. Meanwhile, octanal, Z-1,5-octadien-3-one, nonanal, acetic acid, 2-isopropyl-3-methoxypyrazine, 2-isobutyl-3-methoxypyrazine, 2-sec-butyl-3-methoxypyrazine, E, Z-2,6-nonadienal, and vanillin were of moderate odor potency.
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Plant-insect interactions between female dogwood borer and apple
… from apple trees, four of which (octanal, nonanal, decanal, and methyl salicylate) were identified from all apple tissues sampled. A novel compound,α-bergamotene, was identified from injured apple bark, from apple burr knots infested with dogwood borer larvae and from larval dogwood borer …
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Synthetic sensing systems in Saccharomyces cerevisiae
The yeast Saccharomyces cerevisiae is a major chemical production platform in the biotechnological industry. It is also increasingly being used as a whole cell biosensor. One method of developing such whole cell biosensors in yeast is by exploiting its mating pathway, which is normally induced by …