الفهرس 
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Abstract
Date palm (Phoenix dactylifera L.) is a popular fruit tree in North Africa as date fruits are a significant wellspring of vitality and basic supplements and have some therapeutic advantages (Aleid et al., 2014). It includes many cultivars but Egyptian farmers in Delta region prefer some of them like Zaghlol, Hayany, Samany and recently Barhee cultivar which has a preferable among Egyptian consumers as a fresh fruit at the mature full yellow (bisir) stage due to its crispy flavor and low contents of soluble tannins but at the rutab stage (ripening), fruit market value decreases for its softer and sweeter pulp. MATERIALS AND METHODS: Barhee date palm fruits were harvested at full maturity phase, according to skin color from commercial orchard at the village of Rashid near the Village of Abu Rawash Center of Kerdasa in Giza Governorate, Egypt in first of September for both studied season then transferred to Post-graduate Laboratory of Pomology Department, Mansoura Univ. during 2016 and 2017 seasons. All date palms fruits were assorted depends on similar size and the absence of physical disorder, and then sterilized with 1% sodium hypochlorite (v/v) for 2 min, swill in distilled water carefully and left to dry at room temperature(21°C) for 3 h. Different treatments as various concentrations of coating materials: T1: Na Alg 1% T2: Na Alg 3% T3: Na Alg 5% 4: CaAlg T5: Ca Alg 3% T6: Ca Alg 1% T7: control RESULTS AND DISCUSSION 1. Fruit weight loss percentage: • The treatment of 3% calcium alginate proved to be the most efficient in this concern, followed by 3% sodium alginate treatment. • he highest value of the loss was recorded after 45 days under cold storage ”irrespective of the initial reading” the lowest value was obtained after fifteen days of cold storage of both seasons. 2. Decay (%): • Fruits treated with 3% calcium alginate statistically recorded the lowest fruit decay percentages, followed by 3% sodium alginate treatment during both seasons. 3. Rutab percentage (%) • all treatments increased the rutab percentage of Barhee date fruits as the storage duration was elongated but the fruits coated with calcium alginate 3% presented the lowest percentage compared to other treatments or control which showed the highest percentage in this sense during cold storage and ambient condition during both seasons. 4. Firmness: • Fruits coating with calcium alginate at 3 %have the potential interest for keeping fruit firmness under cold storage and room temperature conditions during both seasons. 5. Moisture content: • Fruits coated with calcium alginate 3% recorded the highest moisture content compared to other treatments in both seasons. 6. Soluble solid content (SSC) (oBrix): The lowest values of this parameter were related to the combination of 15 days storage period with 3% calcium alginate coated fruits in both seasons during ambient and cold storage. 7. Titratable acidity percentage: • The highest fruit acidity content was scored by those treated by 3% calcium alginate in both seasons. • The highest values of this parameter ”irrespective of the initial reading” were scored by using the combination of 15 days storage period. 8. SSC /acid ratio: • Fruits coated with 3% calcium alginate presented the lowest values in this respect during both seasons during ambient and chilled storage. 9. Total sugars content (g/100g DW): • The highest total sugar content of ”Barhee” date fruits was recorded by uncoated fruits followed in descending order by fruit coated with sodium alginate at 5%. • The lowest values of this parameter were scored by 3% calcium alginate-coated fruits followed in ascending order by 3% sodium alginate-coated fruits. 10. Fruit tannins content (mg tannic acid mg/100 g fruit fresh weight): • Fruit coated with calcium alginate at 3% presented the highest tannins content during storage duration during both seasons. In conclusion, Barhee date fruit can retain its physiochemical properties during cold storage and ambient condition by treating with postharvest edible coating of calcium alginate at 3.