In an environmental background characterized by climate change, the seasonal trend increasingly affects qualitative and quantitative expression of vineyards. The sugar concentration, titratable acidity, ratio sugar/acids yield were related with heat accumulation (growing degree days accumulation), calculated in different period grapevine cycle. 21.5 °Babo threshold has been reached Montepulcian...

This study aimed to evaluate the effect of ascorbic and citric acids, blanching on stability Creole mango pulp, during freezing storage. We worked with scalded pulp (100 °C for two minutes) without blanching. Both pulps were treated acids in four combinations, packaged polyethylene bags, frozen stored at -18 90 days. During storage,the slightest browning occurred acidic not followed by pulp. Th...

pH is an important parameter in condensed-phase systems, because it determines the protonation state of titratable groups and thus influences the structure, dynamics, and function of molecules in solution. In most force field simulation protocols, however, the protonation state of a system (rather than its pH) is kept fixed and cannot adapt to changes of the local environment. Here, we present ...

This report describes the historical development in the clinical application of chemical variables for the interpretation of acid-base disturbances. The pH concept was already introduced in 1909. Following World War II, disagreements concerning the definition of acids and bases occurred, and since then two strategies have been competing. Danish scientists in 1923 defined an acid as a substance ...

Many biotic and abiotic parameters affect the metabolites involved in the organoleptic and health value of fruits. It is therefore important to understand how the growers' decisions for cultivar and orchard management can affect the fruit composition. Practices, cultivars and/or year all might participate to determine fruit composition. To hierarchize these factors, fruit weight, dry matter, so...

The ionization behavior of cholic acid, deoxycholic acid, and chenodeoxycholic acid in a variety of physiologically important molecular environments was studied using 13C NMR spectroscopy. The apparent pKa of the carboxyl group was determined from titration curves obtained from the dependence of the carboxyl carbon chemical shift on pH. Using 90% 13C isotopic substitution of the carboxyl carbon...

Co-fermentation of finger millet with horse gram was carried out to produce inexpensive protein-rich food (dosa-an Indian breakfast food). Natural fermentation of finger millet-horse gram flour blend in different proportions (2:1, 3:1, 4:1 and 5:1) was performed for 24 h. Biochemical analysis showed reasonable drop in pH (6.6-4.2) and starch content (25.52%) with considerable augment in titrata...

Apple cider, with (0.1%) and without potassium sorbate, was packaged in 3 different materials to evaluate the effects of irradiation (2 kGy) and storage on flavor. Irradiated apple cider samples were compared with unirradiated samples stored in glass jars. Volatile flavor compounds, soluble solids, and titratable acidity were determined weekly throughout 3 wk of refrigerated storage. Oxygen per...

BAL, E. and S. CELIK, 2010. The effects of postharvest treatments of salicylic acid and potassium permanganate on the storage of kiwifruit. Bulg. J. Agric. Sci., 16: 576-584 Kiwifruit (Actinidia deliciosa cv. Hayward) was used to investigate the effects of salicylic acid (0.5 mM, 1 mM) and potassium permanganate treatments on fruit quality and storage life during storage for two years. After tr...