الفهرس Only 14 pages are availabe for public view
 |  | from | 194 |  |  |
| | | from | 194 | | |
Abstract
The experiments were conducted in two successive seasons(2003-2004), (2004-2005) on Washington Navel orange fruits to study the effect of cold storage conditions on reducing post-harvest
losses and improve keeping quality for the export market. Fruit samples were obtained from El-Fayoum governorate, Egypt and treated with vapor gard (v.g.) (2%), calcium chloride (CaCl2) (4%) or CaCl2 + v.g. Fruits were stored at 2 or 8°C for 60 days and the
last group was stored at 2°C for 30 days and transferred to be stored at 8°C for another 30 days at R.H. 85-90%.
The results revealed that, the fruits stored at 2 + 8°C caused a pronounced decrease in the hazard effect of cold storage by changes in various physiological processes (fruit weight loss, total physiological disorder and decay, fruit’s firmness, fruit colour and juice%) and various metabolic processes as organic compounds
(T.S.S.%, acidity, ascorbic acid, total sugars, total free amino acids, total soluble phenols, free proline, polyamines) and inorganic compounds (calcium and potassium). Furthermore, the results indicated that during storage of treated fruits with vapor
gard alone or with CaCl2 had been in good quality was detected as well as it caused a pronounced decrease in total physiological disorder, decay and keeping the fruit’s firmness, while improve the fruit colour. Moreover, it caused a significant increase in T.S.S.%, acidity, total sugars, total free amino acids, total soluble phenols,
free proline, calcium and potassium concentrations and polyamines.
Generally, it was found from results that calcium chloride either alone or with vapor gard treatment and storage at 2 + 8°C had better results in improving fruit quality and decreasing total fruit losses compared with the other treatments and this was also
accompanied by change in various physiological and metabolic
processes of orange fruits.