Specifications

Pure & Natural Leaf Acetate, Natural CIS-3-HEXENYL ACETATE

Pure & Natural Leaf Acetate is a colorless oily liquid with an intense grassy-green odor of freshly cut green grass and leaves. It is produced in small amounts by most plants and it acts as an attractant to many predatory insects. It is a very important aroma compound that is used in fruit and vegetable flavors and in perfumes. The density and viscosity of binary mixtures cis-3-hexenyl formate (1) + ethanol (2), butyl acetate (1) + ethanol (2), trans-2-hexenyl acetate (1) + ethanol (2), and cis-3-hexenyl acetate (1) + ethanol (2) over the whole range of composition have been measured at three different temperatures (293.15 K, 303.15 K, and 313.15 K). The excess molar volume and viscosity deviation of these systems were also calculated, and the results were fitted to a well-known Redlich−Kister-type polynomial equation. Fifty-one virgin olive oils of good quality, extracted with a laboratory mill in the same operative conditions from different unripe Italian, Greek and Spanish cultivars, were submitted to sensory evaluation, and to the determination of both polyphenols and the composition of volatile compounds produced through lipoxygenase (LOX) pathways. Univariate analysis was applied to the mentioned variables and some correlations were observed among them. Moreover, a Linear Regression Analysis (LRA) was carried out assuming, as dependent variable, each sensory attribute perceived by tasters and, as independent variables, all compounds derived, derived LOX pathways and polyphenols. The results obtained demonstrate the essential role played by hexanal in the formation of most attributes considered. The most relevant contributors among C₆ compounds from linolenic acid were trans-2-hexenal, trans-2-hexen-1-ol andcis-3-hexenylacetate. Polyphenols contributed to the characterization of walnut husk, bitter and pungent characters, whereas C₅ compounds, especially 1-penten-3-one, strongly affected most attributes.