Browsing by Author "Wan Omar Bin Abdullah"
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Publication Extraction, Characterization And Total Phenolic Content Of Local (Malaysian) Green Sweet Potato (Ipomoea Batatas) Leaves(The International Journal of Science, Commerce and Humanities, 2014) ;Anuar Sani ;Wan Omar Bin Abdullah ;Thema JuhanaMohamed Adel Mohamed Abdel Rahim ElkadiSweet potato leaves (SPL) have been used by malay rural folks as traditional topical medication for eczematous skin conditions especially psoriasis. Local Chinese consume green SPL as vegetable. SPL contains high amount of polyphenols, a proven antioxidant and free radical scavengers. Local green SPL was extracted for hydrophilic and lipophilic compounds using water, ethanol and hexane as solvents. Water extraction method gave the best yield per kg fresh weight. Total phenolic content was 4.48 mg GAE/g dw SPL, slightly lower of Japan's and USA's averages. HPLC analysis revealed significant amount of caffeic acid as one of its major phenolic components beside the dominant chlorogenic acid. - Some of the metrics are blocked by yourconsent settings
Publication Identification of Phytochemicals of Phoenix dactylifera L. Cv Ajwa with UHPLC-ESI-QTOF-MS/MS(Taylor and Francis Ltd., 2021) ;Omaima Adil Najm ;Faizul Helmi Addnan ;Nur Fariha Binti Mohd Manzor ;Mohamed Adel Elkadi ;Wan Omar Bin Abdullah ;Amin IsmailFadlul Azim Fauzi Bin MansurDate palm (Phoenix dactylifera) fruit is an important food in the Middle East. Some date palm cultivars like the Ajwa is revered for its health-promoting properties. Phytochemicals like phenolic compounds are in part responsible for such health benefits. However, detailed information on these compounds is lacking. The present work aimed to investigate phytochemical components of Ajwa cultivar using UHPLC-ESI-QTOF-MS/MS in three different extraction solvents (aqueous, methanol–water, acetone–water) and three different extraction durations (2, 5 and 24 h). The proposed method provided tentative identification of 169 bioactive compounds out of which 44 (polyphenols and other phytochemical compounds) were successfully identified from three different extracts and three different extraction durations. Twenty-one compounds never previously reported in the Ajwa cultivar were identified. Aqueous-based extraction solvent and 24-h extraction duration yielded most phytochemical compounds.