1961
DOI: 10.1021/jf60116a018
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Onion Flavor and Odor, Enzymatic Development of Pyruvic Acid in Onion as a Measure of Pungency

Abstract: mg. per liter for linalool and 12.6 mg. per liter for -terpineol, their approximate concentrations in peel juice. Three out of 14 described linaloól as conferring a bitter flavor, but only one out of 11 thought -terpineol bitter when each was

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Cited by 327 publications
(273 citation statements)
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References 14 publications
(23 reference statements)
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“…The results were expressed in percentage of glucose per 100 g of pulp. g) Pungency -quantified as a function of pyruvic acid content using the colorimetric method described by Schwimmer and Weston (1961), thus, 0.2 mL of garlic juice, 1.5 mL of trichloroacetic acid (5%) and 18.3 mL of distilled water were placed to an Erlenmeyer flask and stirred. Then, 1 mL of this sample was placed in a tube test, in which was added 1 mL of 2,4-dinitrophenylhydrazine (DNPH) and 1 mL of distilled water, and stirred in vortex.…”
Section: Methodsmentioning
confidence: 99%
“…The results were expressed in percentage of glucose per 100 g of pulp. g) Pungency -quantified as a function of pyruvic acid content using the colorimetric method described by Schwimmer and Weston (1961), thus, 0.2 mL of garlic juice, 1.5 mL of trichloroacetic acid (5%) and 18.3 mL of distilled water were placed to an Erlenmeyer flask and stirred. Then, 1 mL of this sample was placed in a tube test, in which was added 1 mL of 2,4-dinitrophenylhydrazine (DNPH) and 1 mL of distilled water, and stirred in vortex.…”
Section: Methodsmentioning
confidence: 99%
“…Pyruyic acid content (PAC), measure for pungency of onion, was determined by Anthon and Barrett method using reagent 2, 4-dinitrophenylhydrazine (Anthon and Barrett 2003) which was a slight modification to the Schwimmer and Wetson (1961) method. The content was calculated on dry basis and expressed as micromole per 100 g solid.…”
Section: Specific Energy Consumptionmentioning
confidence: 99%
“…Apesar de não haver uma relação direta, sabe-se que alho com elevados teores de sólidos totais e de ácido pirúvico, simultaneamente, apresenta maior índice industrial. Segundo Schwimmer & Weston (1961) isso irá refletir em maior rendimento e produtos de aroma acentuado, pois o aroma do produto processado, tanto de alho como de cebola, está diretamente relacionado aos teores iniciais de ácido pirúvico dos bulbos.…”
Section: Resultsunclassified
“…5) Relação sólidos solúveis/acidez titulável (SS/ AT): determinado pela relação entre o teor de sólidos solúveis e a acidez titulável. 6) Pungência: estimada por meio da determinação do ácido pirúvico, utilizando-se o reagente 2,4-dinitrofenilhidrazina (DNPH), pelo método colorímetro descrito por Schwimmer & Weston (1961). Em erlenmeyer, adicionou-se 0,2 mL do suco do alho, 1,5 mL de ácido tricloroacético a 5% e 18,3 mL de água destilada, para obtenção do extrato.…”
Section: Methodsunclassified