Journal Article
Biochemical properties evaluation of some Libyan dates
Year:
2021
Author:
Elsherif Khaled Muftah, Aljaroushi Amal Mohamed
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The current research targeted to estimate total sugars, fats, proteins, phenols, andantioxidant activity of ethanolic extract of five date varieties (al-Tabouni (TAB),al-Bakrari (BAK), al-Aami (AAM), al-Hamouri (HAM), and al-daqla (DAQ))available in Libya. Also, phytochemical screening for ethanolic and aqueousextracts were performed. In general, the two extracts were rich in carbohydrates,proteins, phenols, flavonoids, alkaloids, and glycosides. However, steroids didntexist in aqueous extract and saponins in both extracts. Total sugars were estimatedby spectrophotometric methods, the proteins using the Kjeldahl method, and fatsby the Soxhlet device, and their percent were ranged between 49 - 66%, 1.43 -2.25, 0.10 - 0.25% (w/w) for sugars, proteins and fats, respectively. The totalphenols were also estimated using the Folin reagent method, where the results areexpressed as mg (gallic acid equivalent) per g (extract) and ranged from 13.5 to20.5 mg/g, and the highest level was in the DAQ variety. The DPPH (2,2-diphenyl-1-picrylhydrazyl) scavenging method was also used to estimate totalantioxidants where the two largest levels were found in the DAQ and HAMvarieties with concentrations of 10.68 and 10.63 mg (ascorbic equivalent)/g(extract), respectively. DAQ extract has reduced the 50% of DPPH at lowerconcentration of 0.110 mg/ml (IC50). Furthermore, good positive correlation wasfound between total phenols and DDPH in ethanolic extract.
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DOI Link: https://doi.org/10.22034/crl.2021.299197.1121