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 19 of 19 for “"GC-O"”.
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Effects of water chemistry and panning on flavor volatiles and catechins in teas (Camellia sinensis)
… on extraction of epigallocatechine gallate (EGCG) and caffeine in green tea and oolong tea aqueous infusions. The extraction of EGCG and caffeine were lower when green tea was brewed in hard water compared to distilled water. Brewing green tea and Oolong tea in tap water resulted in higher …
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Analysis of potent odorants in spearmint oils
… application of gas chromatography-olfactometry (GC-O) and gas chromatography-mass spectrometry (GC-MS). Aroma extract dilution analysis was performed to determine the potency of the odorants. Of the 85 odorants detected, R-(-)-carvone was the most potent odorant in all three spearmint oils. …
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Using Flavor Chemistry, Sensory, and Texture to Determine Domestic Edamame Quality
… prior to gas chromatography-mass spectrometry (GC-MS) and gas chromatography-olfactometry (GC-O) analyses to obtain (1) impactful volatile compounds present, (2) changes in these compounds by stink bug feeding injury, and (3) volatile contributions to sensory characteristics. Sensory methods …
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Characterization of aroma and flavor compounds present in lambic (gueuze) beer
… commercially available lambic gueuze using SPME/GC-MS and HPLC, and (3) determine the major aroma compounds of aging lambic beer using GC-O. Comparing the two extraction methods, both SPME and SAFE were able to identify a similar number of chemical compounds, however SAFE identified a greater …
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Decoding the Flavor of Kentucky's Native Pawpaw Fruit
… are present. Gas chromatography – olfactometry (GC-O) was applied on capillary GC columns with various means of extraction. The volatile compounds present were extracted using both headspace solid phase micro-extraction (HS-SPME) for 30 minutes at 23°C and 50°C, and solvent extraction using …
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Sensory directed determination of odor important components of natural (raw) and roasted pecan oil
… determined by gas chromatography-olfactometry (GC-O) and aroma extract dilution analysis (AEDA). Selected odorants were subsequently identified and quantified by gas chromatography-triple quadrupole-mass spectrometry [GC-(TQ)MS] using stable isotope dilution analysis (SIDA). Sensory descriptive …
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Reflective mulch effects on the grapevine environment, Pinot noir vine performance, and juice and wine characteristics
… was held and gas chromatography-olfactory (GC-O) was used to analyse aroma profiles of wine and juice. Mulches affected various soil parameters. MS buffered soil temperature and all mulches increased soil water retention especially MS. MS had higher microbial biomass carbon than glass. Soil …
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Organização cromossômica e dinâmica evolutiva de sequências repetitivas em formigas cultivadoras de fungos (Myrmicinae: Attini: Attina)
… repetitivas heterocromáticas são ricas em GC, o que é um traço incomum em Formicidae. Assim, essa tese focou no estudo do DNA repetitivo em Attina a partir de uma abordagem citogenética molecular. Considerando que a maior parte dos estudos disponíveis envolvendo sequências repetitivas para …
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Physicochemical and aroma characterization of Arbutus pavarii honey
… identified by gas chromatography olfactometry (GC-O) and gas chromatography mass spectrometry (GC-MS) analytical methods and confirmed by authentic standards. The potent odorants of the honey were determined by aroma extract dilution analysis (AEDA) of the CLLE-SAFE extract using GC-O. …
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Identification and quantitation of predominant odorants in roasted chicory
… was achieved by gas chromatography-olfactometry (GC-O) combined with aroma extract dilution analysis (AEDA) and gas chromatography-mass spectrometry (GC-MS). Forty-six compounds were quantitated by stable isotope dilution analysis (SIDA) and odor-activity values (OAVs). Based on the combined …
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Modelo de norma de reação para avaliação da interação genótipo x ambiente para idade ao primeiro parto em bovinos da raça Guzerá
… março). Foram formados grupos de contemporâneos (GC) considerando rebanho e ano e definidos como gradiente ambiental. Apenas os GC com no mínimo três registros de filhas de dois reprodutores diferentes foram considerados neste estudo. Foi utilizada a metodologia de normas de reação em dois passos, …
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Identification of compounds responsible for the characteristic “soy sauce” flavor of traditional Chinese liquor
… assessed by gas chromatography-olfactometry (GC-O) and aroma extract dilution analysis (AEDA). Based on the results of AEDA, the most potent odorants in MT were: acetal; ethyl 2-methylpropanoate; ethyl butanoate; ethyl 2-methylbutanoate; ethyl 3-methylbutanoate; ethyl pentanoate; ethyl …
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Selección de variables y descubrimiento causal a partir de textos de artículos periodísticos
… la técnica basada en la Causalidad de Granger (GC por sus siglas en inglés) y la técnica de descubrimiento de estructuras causales PC (que recibe el nombre por las iniciales de sus autores). Por otro lado, existe un gran interés por parte de la comunidad de procesamiento de lenguaje natural (NLP …
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Sensorial, cultural and volatile properties of dairy powders, yoghurt and butter from pasture and non-pasture cow diets
… utilised with gas chromatography olfactometry (GC-O) and sensory analysis to determine which specific compounds are most likely influencing sensory perception. In addition the impact of cow diet was assessed in terms of the volatile and sensory profile on skim milk powder, whole milk powder and …
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Physicochemical and flavor characterization of Tupelo honey
… identified by gas chromatography-olfactometry (GC-O) and gas chromatography-mass spectrometry-olfactometry (GC-MS-O). Initial analyses were performed on the same ten samples as described above by static headspace solid phase microextraction (H-SPME). Of the 40 compounds detected, the most …
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Impact of roasting on the physicochemical characteristics of cacao beans and dark chocolate flavor profile
… (DSE-SAFE), gas chromatography-olfactometry (GC-O), gas chromatography-mass spectrometry-olfactometry (GC-MS-O), and stable isotope dilution analysis (SIDA) coupled with headspace-solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS). Additionally, Quantitative …
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Hemofiltración continua durante la circulación extracorpórea y su efecto sobre la lactatemia
… grupos de tratamiento: un grupo sin hemofiltrar (GC) o control y un grupo hemofiltrado (GP) con un filtro de polietersulfona. Para el estudio se recogieron muestras analíticas previos a la cirugía, durante la cirugía (cada veinte minutos), al finalizar el procedimiento y a las 24 horas en la …
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Impact of nixtamalization on flavor development in traditional Mexican tortillas: a comparative analysis of aroma impact compounds
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-08-01
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Peanut butter and sunflower seed butter cookies: characterization and comparison of key odorants
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-08-01