The reaction of L-ascorbic acid with L-cysteine in heated aqueous solution (141 ± 1 C) at five different pH values (5.00, 6.00, 7.00, 8.00, or 9.00) for 2 h, resulted in the formation of a complex mixture of aroma volatiles. The volatile compounds generated were analysed by SPME–GC–MS. The results gave 43 aroma compounds. The reaction between L-ascorbic acid and L-cysteine led mainly to the for...

Effects of 1-methylcyclopropene (1-MCP), 2-chloroethyl phosphonic acid (ethephon), and methyl jasmonate (MeJA) on production of aroma volatile compounds and ethylene by ‘Delicious’ and ‘Golden Delicious’ apples [Malus sylvestris (L.) Mill. var. domestica (Borkh.) Mansf.] during ripening were investigated. Forty-four volatile compounds in ‘Delicious’ and 40 compounds in ‘Golden Delicious’ were d...

Viticultural practices influence both grape and wine quality. The influence of training systems on volatile composition was investigated for Albariño wine from Rías Baixas AOC in Northwest Spain. The odoriferous contribution of the compounds to the wine aroma was also studied. Volatile compounds belonging to ten groups (alcohols, C₆-compounds, ethyl esters, acetates, terpenols, C13-norisoprenoi...

This study investigated the contribution of volatile compounds to the overall aroma of Cabernet Sauvignon wines from Changli County (China). Wine samples were collected from vintages from 2000 to 2005. Volatile compounds were extracted by PDMS solid-phase micro-extraction fibers and identified by Gas Chromatography-Mass Spectrometry (GC-MS). A total of 65 volatile compounds were identified and ...

Introduction: The quality of fresh produce has traditionally been based on external characteristics of size, color, and absence of surface defects. Fruit and vegetable breeders selected for color, size, disease resistance, yield and other easily quantified horticultural traits. Because flavor and texture characteristics were not a part of the selection process, improvements in these quality att...

Plants are a major atmospheric source of volatile organic compounds (VOCs). These secondary metabolic products protect plants from high-temperature stress, mediate in plant-plant and plant-insect communication, and affect our climate globally. The main challenges in plant foliar VOC research are accurate sampling, the inherent reactivity of some VOC compounds that makes them hard to detect dire...

The effect of oleic acid (5 and 10% v/v) and xanthan gum (0.5 and 1% wt) on  partitioning and retention of ethyl acetate and diacetyl from two matrices with a different composition was investigated by applying static head space gas chromatography. Two matrices with different composition have been developed: one containing carbohydrates (xanthan gum) and in the second one, called co...

Two new alcoholic aroma precursors, cis- and trans-linalool, 3,7-oxides 6-O-beta-D-apiofuranosyl-beta-D-glucopyranosides (1 and 2), as well as two already known compounds, (Z)-3-hexenyl beta-D-glucopyranoside (3) and methyl salicylate 6-O-beta-D-xylopyranosyl-beta-D-glucopyranoside (beta-primeveroside: 4), and another new monoterpendiol glycoside, 8-hydroxygeranyl beta-primeveroside (5) have re...