abstract: in this study, response surface methodology was used to optimize ultrasound osmotic pretreatment with finished freeze drying of black cherries. freeze drying is a separation process based on the  sublimation phenomenon. this process has the following advantages as compared to the conventional drying process, maintenance of the structure, moisture removal at low temperature (reduced tr...

tomatoes (roma cultivar) picked up for the study were obtained from varaminelocal market. each tomato was divided into four portions. quarter portions of tomato were placed in osmotic solutions that were different in levels of sucrose and nacl (30 and 40% for sucrose, and 5, 10 and 15% for nacl). osmotic dehydration was carried out for varied time durations from 15 up to 240 min. temperature of...

This study aimed to determine the effects of osmotic dehydration on kinetics hot air drying apricot halves under conditions that were similar industrial ones. The process was performed in a sucrose solution at 40 and 60 °C concentrations 50% 65%. As expected increased temperatures resulted water loss, solid gain shrinkage. well described by Peleg model. effective diffusivity 5.50–7.387 × 10−9 m...

The present study aimed to evaluate the influence of selected compounds from the polyol group, as well as other saccharides, on the osmotic dehydration process of apples. The following alternative solutions were examined: erythritol, xylitol, maltitol, inulin and oligofructose. Efficiency of the osmotic dehydration process was evaluated based on the kinetics of the process, and through comparis...

The protective effect of epigallocatechin-3-gallate (EGCG) against cigarette smoke (CS) induced alterations in human erythrocyte was studied using an in vitro model. Hemolysis, carboxyhemoglobin, osmotic fragility, hemin, lipid peroxidation (LPO), protein thiol, protein carbonyl, glutathione, antioxidant enzymes, membrane bound ATPases and erythrocyte ghost protein were assessed to investigate ...

banana is one of the most important tropical fruit from commercial and industrial point of view. this fruit is an extremely perishable fruit which can not be preserved using freezing process. therefore, drying is the most promising method. conventional air drying is energy intensive and consequently expensive method. pre-treatments can be used to reduce the initial water content or to modify th...

The pumpkin is an important kitchen garden crop with very high nutritional value and long lifetime for storage and lot of fiber that acts as one of the best preventive factors from morbid obesity, hypertension, and cardiac diseases. As pretreatment for dehydration, osmotic dehydration creates maximum possible quality in the product by transfer of water outside the tissue of the nutrient. In thi...

The effect of Ca(2+) channel blockers on cytosolic Ca(2+) levels and the role of Ca(2+) in glycerol metabolism of Dunaliella salina under hypoosmotic or hyperosmotic stress were investigated using the confocal laser scanning microscope (CLSM). Results showed that intracellular Ca(2+) concentration increased rapidly when extracellular salinity suddenly decreased or increased, but the increase co...