Organosolv delignification of agricultural residues (date palm fronds, Phoenix dactylifera L.) of the United Arab Emirates

Red Sayer is one of the date varieties from the United Arab Emirates. This variety is one type of dates that is imported into Indonesia and used as processed date palm juice producing waste, namely date seeds. Date seeds can be made into some coffee that is rich in antioxidants and does not contain caffeine. The purpose of this study is to determine the chemical characteristics, antioxidant activity, total phenol, and caffeine contents in coffee of the Red Sayer variety date seeds. Coffee of date seeds is made into powder and then analyzed for its contents of water, ash, protein, fat, carbohydrates and total sugar, besides its antioxidant activity, total phenol, and caffeine levels. The results of the analysis obtained are, as follows: 4.42±0.01% water, 1.17±0.04% ash, 8.55±0.64% protein, 7.34±0.07% fat, 78.52±0.76% carbohydrate, 16.39±0.01% total sugar, 23.81±0.22 µg/mL antioxidant activity (IC50) and 340.65±1.53 mg GAE / 100g total phenol, while caffeine is not detected. Red Sayer date seed coffee, therefore, can be a source of carbohydrates and natural antioxidants that does not contain caffeine.

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Quantification of water soluble vitamins in six date palm (Phoenix dactylifera L.) cultivar's fruits growing in Dubai, United Arab Emirates, through high performance liquid chromatography

Journal of Saudi Chemical Society ◽

10.1016/j.jscs.2011.02.015 ◽

2013 ◽

Vol 17 (1) ◽

pp. 9-16 ◽

Cited By ~ 11

Author(s):

Junaid Aslam ◽

Sheba Haque Khan ◽

Saeed Ahmad Khan

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

United Arab Emirates ◽

High Performance ◽

Date Palm ◽

Phoenix Dactylifera ◽

Water Soluble ◽

Phoenix Dactylifera L

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Genetic variability in selected date palm (Phoenix dactylifera L.) cultivars of United Arab Emirates using ISSR and DAMD markers

3 Biotech ◽

10.1007/s13205-018-1108-3 ◽

2018 ◽

Vol 8 (2) ◽

Cited By ~ 3

Author(s):

Fayas T. Purayil ◽

Gabriel A. Robert ◽

Kodiveri M. Gothandam ◽

Shyam S. Kurup ◽

Sreeramanan Subramaniam ◽

...

Keyword(s):

Genetic Variability ◽

United Arab Emirates ◽

Date Palm ◽

Phoenix Dactylifera ◽

Phoenix Dactylifera L

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Biochemical Changes and Antioxidant Variations in Date Palm (Phoenix dactylifera L.) Varieties during Flower Induction and Development

Plants ◽

10.3390/plants10112550 ◽

2021 ◽

Vol 10 (11) ◽

pp. 2550

Author(s):

Saeed R. H. A. Al Shamsi ◽

Gabriel A. Rabert ◽

Shyam S. Kurup ◽

Mohammed Abdul Muhsen Alyafei ◽

Abdul Jaleel

Keyword(s):

Ascorbic Acid ◽

Polyphenol Oxidase ◽

United Arab Emirates ◽

Date Palm ◽

Reduced Glutathione ◽

Ascorbic Acid Content ◽

Phoenix Dactylifera ◽

Biochemical Changes ◽

Opposite Trend ◽

Phoenix Dactylifera L

The present investigation was carried out to explore the biochemical changes and antioxidant variations, including non-enzymatic and enzymatic antioxidant variations, in the leaves of different varieties of date palm (Phoenix dactylifera L.) belonging to the early, mid-, and late-flowering categories in the United Arab Emirates. The changes in the protein and phenol concentration; the ascorbic acid, reduced glutathione, and α-tocopherol contents; and the activity of peroxidase and polyphenol oxidase were studied in the leaves during the preflowering, flowering, and postflowering stages of the date palms. Two varieties each from the early (Shaham, Khanezi), mid- (Barhee, Nabthasaif), and late- (Khasab, Fardh) flowering types were used in this study. The protein content in the leaves was higher in the early flowering varieties during the preflowering stage but lower in the other two varieties. The phenol content showed an opposite trend to the protein. There was significant variation in the ascorbic acid content and a reduction in glutathione and α-tocopherol between the leaves of different varieties. Similarly, the activity of the antioxidant enzyme ascorbate peroxidase in the leaves was higher during the preflowering stage in all varieties. The superoxide dismutase (SOD), polyphenol oxidase (PPO), and catalase (CAT) activity was highest in the Bharhee leaves for all the stages. The peroxidase activity (POD) was highest in the Fardh variety of date palm, whereas the Khanezi variety exhibited the lowest activity. This study can be used as a baseline for developing more protocols for understanding the possible roles of biochemicals, antioxidants, antioxidant enzymes, and their interactions in the regulation of flower development in different date palm varieties.

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