Search results for "Methyl cinnamate"
showing 3 items of 3 documents
Influence of packaging on the aroma stability of strawberry syrup during shelf life
2001
Different types of packaging (glass bottle, PVC, and PET) were compared for the preservation of aroma quality of a strawberry syrup during shelf life. Esters, alcohols, and aldehydes were analyzed by solid-phase micro-extraction (SPME) and solvent extraction. During storage, hydrolysis of esters in acids and alcohols led to a modification of the aroma profile which can be explained by the replacement of “fruity” and “fresh” notes by “dairy note” in the syrup. Aroma compounds that are responsible for fruity notes, such as methyl cinnamate, methyl anthranilate, and methyl dihydrojasmonate, were strongly reduced after 90 days. This could be explained by a selective interaction of these compoun…
Test of isotopic fractionation during liquid-liquid extraction of volatile components from fruits
1995
Fruits constitute a natural source of flavoring molecules. Nevertheless, an isotopic fractionation could be induced by the extraction of volatile molecules from fruits. After the addition of six volatile molecules to Italia grape (hexyl acetate, acetic acid, linalool, butanoic acid, 3-hydroxy-2-methyl-4-pyrone, and methyl cinnamate) and five volatile molecules to Primofiori lemon (hexanal, trans-2-hexenyl acetate, 1-hexanol, trans-2-hexenol, and 4-decanolide) before extraction, it has been established that, for a particular extraction procedure, there is no significant difference between the 13 C enrichments of these molecules before and after extraction. Nothing has been concluded for acet…
The chemical composition of the floral extract of Epipogium Aphyllum sw. (Orchidaceae): A cluefor thier pollination biology
2014
Epipogium aphyllum is a rare European obligate mycoheterotrophic orchid lacking chlorophyll. It has not been studied previously with respect to pollination biology. We studied the association between the composition of floral scent emission and its pollination systems. Field observation indicates that the main pollinators of Epipogium aphyllum are representatives of the genus Bombus (Hymenoptera), B. lucorum, B. hortorum, B. terrestris, B. pascuorum and B. proteus, and the genus Apis (Hymenoptera) namely A. mellifera. The main potential vector (observed to accidentally carry pollen), is most likely Episyrphus balteatus (Diptera, Syrphidae). The chemical composition of the floral extracts of…