The most representative and typical

The most representative and typical extract was obtained by vacuum headspace sampling and subsequent liquid-liquid extraction of the aqueous phase. The volatile flavor components of yellow passion fruits have been isolated using four different isolation techniques. Approximately 180 components were identified in the LC fractions of yellow passion fruit flavor for the first time. In addition, the enantiomeric distributions of several chiral flavor substances were determined by enantioselective multidimensional gas chromatography. Yellow passion fruit is one of the most popular and best known tropical fruits having a floral. The attractive tropical flavor note of ripe yellow passion fruits has been shown to be associated with trace levels of sulfur volatiles. In the past decades, flavor volatiles have mainly been isolated by means of liquid-liquid extraction, simultaneous distillation and extraction, or dynamic headspace analysis. The antioxidant activities and total phenolics of 28 plant products, including sunflower seeds, flaxseeds, wheat germ, buckwheat, and several fruits, vegetables, and medicinal plants were determined. The correlation coefficient between total phenolics and antioxidative activities was statistically significant. The measurement of antioxidant capacity in fruits differs from that of other biological samples due to their low pH and very low lipophilic antioxidant capacity. The measured antioxidant capacity of samples varied with the assay method used, pH, and time of reaction. All fruit extracts exhibited complex and varied kinetics and required long reaction times to approach an end point. Because the antioxidant capacity of fruit extracts is a function of the array of individual antioxidants present, accurate comparisons among fruit samples require that reaction times be standardized and of sufficient length to reach steady state conditions and that more than one assay be used to describe the total antioxidant activity of fruit samples. The aromas of fruits, flowers, herbs, and spices perceptably change following picking of the plant part because the plant part is then, in effect, biologically dead. The commercial application of this noble technology is also discussed. An overwhelming body of research has now firmly established that the dietary intake of berry fruits has a positive and profound impact on human health, performance, and disease. Given the wide consumption of berry fruits and their potential impact on human health and disease, conferences and symposia that target the latest scientific research (and, of equal importance, the dissemination of this information to the general public), on the chemistry and biological and physiological functions of these “superfoods” are necessary.