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Articles by Khalid M. Alkharfy
Total Records ( 4 ) for Khalid M. Alkharfy
  Asma Saeed , Bushra Sultana , Farooq Anwar , Muhammad Mushtaq , Khalid M. Alkharfy and Anwarul-Hassan Gilani
  The present study reports the antioxidant and antimutaganic potential of the aqueous (30 and 70%) and acidified (0.5 and 1 N) methanolic extracts from seeds and pods of green cardamom (Elettaria cardamomum). The Total Phenolic Compounds (TPC) of extracts were determined by Follin-Ciocalteu reagent. Antioxidant activity of the extracts produced was evaluated by the measurements of 2, 2,-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity and percentage inhibition of linoleic acid peroxidation method, whereas mutagenic and antimutagenic activities were assessed using Ames bacterial test. The TPC, scavenging of DPPH° and inhibition of linoleic acid were found to be 27.75-126.35 mg gallic acid equivalent g-1 DW, 46-91% at 5 mg L-1 of extract concentration and 34-83%, respectively. Furthermore, the extracts of seeds and pods of green cardamom showed strong antimutagenic potential against mutant strains S. typhimurium TA98 and S. typhimurium TA100 while none of the extract showed mutagenicity. The results of this study support that the extracts from cardamom seeds and pods can be explored as potential chemotherapeutic agents against cancer as well as for the pharmaceutical and nutraceutical applications.
  Farooq Anwar , Shamsa Kanwal , Ghulam Shabir , Khalid M. Alkharfy and Anwar H. Gilani
  The current study appraises the antioxidant and antimicrobial activities of the leave extracts from four different species of Mulberry (Morus nigra L., Morus alba L., Morus macroura Miq. and Morus laevigata W.). In addition to estimation of total phenolic and total flavonoids contents, the antioxidant activity of the extracts was evaluated by measuring the reducing power, inhibition of linoleic acid peroxidation and 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) scavenging activity. The yield of the extractable components from leaves ranged from 4.41-14.53 g/100 g Dry Weight (DW). The tested leave extracts exhibited widely variable amounts of total phenolics (3.14 to 11.38 g GAE/100g DW) and total flavonoids (0.53-5.83 g CE/100g DW). Reducing power of extracts at concentration 2.5 to 12.5 mg mL–1 ranged from 0.40-1.52. The leave extracts considerably inhibited linoleic acid peroxidation up to the level of 60.23-88.51% and also showed remarkable DPPH radical scavenging activity with contribution 43.83-77.51%. The antioxidant and antimicrobial potential of the tested leave extracts varied considerably in relation to the species and extraction solvents employed. Overall, the aqueous-methanolic extract of Morus nigra exhibited the superior antioxidant and antimicrobial activities among others. The present results advocate that mulberry leaves are a potential candidate for isolation of antioxidant and antimicrobial agents for potential nutraceutical and pharmaceutical applications.
  Farooq Anwar , Gulzar Muhammad , Muhammad Ajaz Hussain , Gokhan Zengin , Khalid M. Alkharfy , Muhammad Ashraf and Anwarul-Hassan Gilani
  Caper (Capparis spinosa L.), a drought tolerant plant belonging to genus Capparis of the family Capparidaceae is mainly distributed in arid and semi-arid regions of the tropical and subtropical world. The plant, as a potential source of valuable nutrients such as vitamins (especially vitamin C), digestible protein, reducing sugars and essential minerals is valued for human food. The fruit of this plant, being a rich source of high-value components, is usually pickled and added to salads, sauces and jams. The plant has been used traditionally to prevent and/or treat a number of health disorders such as diabetes, hepatitis, obesity and kidney problems. Besides uses as an ingredient for food and feed, the contents of bioactive phytochemicals such as terpenoids, alkaloids, glucosinolates, tocopherols, polyprenols, isothiocyanates, carotenoids and phenolics, have allowed to envisage potential applications of C. spinosa as a health promoter plant. A broad range of pharmacological activities such as antioxidant, cardiovascular, antimicrobial, anti-inflammatory, hepatoprotective, antipyretic, diuretic and hypoglycemic have been ascribed to different parts of C . spinosa. This comprehensive review describes the detailed profile of high-value nutrients and bioactives along with pharmacological and phyto-medicinal attributes of this multipurpose food plant with the aim to exploring its potential uses as ingredients for functional foods and nutraceutical/pharmaceutical industry.
  Farooq Anwar , Khalid M. Alkharfy , Najeeb-ur-Rehman , Elsadig Hassan Khamis Adam and Anwar-ul-Hassan Gilani
  Objective: The objective of study was to assess the variation of volatiles and biological activities (antioxidant, antimicrobial, cytotoxic and thrombolytic) of essential oils from aerial parts of Mentha longifolia harvested from five regions of Saudi Arabia such as Al-Kharj, Al-Qassim, Dammam, Abha and Al-Madinah. Methodology: Within the regions, the hydro distilled essential oil yield varied from 0.66-1.52% (dry weight basis) with least contribution from Abha and the highest from Al-Qassim populations. The isolated oils were then analyzed by Gas Chromatography-Mass Spectrometry (GC-MS) which confirmed the identification of a total of 18-33 volatile components in different M. longifolia ecotypes, representing 96.7-98.9% of the total oil composition. The oils were analytically characterized by occurrence of carvone (35.30-71.51%) as a principal compound, followed by limonene (5.73-28.45%) and 1, 6 dihydrocarveol (0-12.33%). Results: Results showed that trans-dihydrocarvone, 1,8-cineole, β-caryophyllene, β-bourbonene, germacrene D and bicyclosesquiphellandrene were also detected in considerable amounts. The oils mainly, showed notable (p<0.05) quantitative variations and were dominated by oxygenated monoterpenes (53.76-79.65%) followed by monoterpene hydrocarbons (8.63-32.13%), sesquiterpene hydrocarbons (2.79-18.41%) and then oxygenated sesquiterpenes (0.77-2.18%). The oils (10.0 μg mL–1 concentration) exhibited notable antioxidant potential as assessed by the determination of DPPH• scavenging capacity (54.9-89.7%; IC50 4.4-8.5 μg mL–1) along with total phenols (0.7-4.7% mg GAE/100 g). Moreover, the oils, relative to major compound, carvone and reference compounds, showed moderate antifungal activity against A. niger , A. flavus and F. solani but were weekly active against bacteria such as E. coli and S. aureus. The oils exhibited moderate to good thrombolytic activity with clot lysis of 11.6-68.4% and low cytotoxicity (1.7-5.1%) in vitro. Except, antioxidant assays, the biological attributes of the oils tested were found to be fairly correlated with the contents of oxygenated monoterpenes and/or monoterpene hydrocarbons. Conclusion: Overall, the current findings revealed noteworthy variation in the (bioactives) composition and biological characteristics of the tested essential oils that can be mainly linked to the morphological and biochemical diversity of M. longifolia plants depending on the agro-ecological conditions of the areas/regions selected. The presently examined M. longifolia chemotypes from Saudi Arabia can be explored as a prospective source of carvone-rich essential oil with promising antioxidant, antimicrobial and thrombolytic activities. These results may also provide a scientific basis and support for the ethno medicinal uses of this species in traditional healing.
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