I. Syed Zahir's research while affiliated with International Islamic University Malaysia and other places
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Publications (3)
The aims of this study are to determine and compare the antioxidant levels and activities (i.e. primary and secondary) between selected seeds of Malaysian tropical fruits - guava (Psidium guajava), mango (Mangifera indica L.) and papaya (Carica papaya L.). Seeds are among byproducts from the processing of fruitsbased products. Instead of discarding...
The aim of this study is to determine the total phenolic content and primary antioxidant activity of methanolic and ethanolic extracts of four aromatic plants' leaves namely knotweed (Polygonum minus), curry (Murraya koenigii), kaffir lime (Citrus hysrix) and fragrant screwpine (Pandanus odurus). Total phenolic content (TPC) assay using Folin-Cioca...
The aim of this study is to compare antioxidant level and activities (i.e. primary and secondary) in pulps and peels of two species of dragon fruits, Hylocereus undatus (white dragon fruit) and Hylocereus polyrhizus (red dragon fruit). Total phenolic content (TPC) assay demonstrated that peels of both Hylocereus species contained higher phenolic co...
Citations
... One of the best uses for red pitaya is as a natural food colourant because of the presence of betacyanin pigments (11). The peels of this fruits are rich in vitamins, antioxidants, soluble and insoluble fibers, pectin, and betacyanin (12)(13)(14). Due to the presence of various phytochemicals, these fruits show different pharmacological activities (15). ...
![[object Object]](https://i1.rgstatic.net/ii/profile.image/272431885582340-1441964231329_Q64/Aisyah-Rehan.jpg)
![[object Object]](https://i1.rgstatic.net/ii/profile.image/11431281127596984-1679067806217_Q64/Kamarul-Rahim-Kamarudin.jpg)
... The standard solution of phenolic compounds used was gallic acid with various concentrations of 20-100 mg/L. Gallic acid equivalent (mgGAE/g) was used to assess the overall phenolic content [15]. ...
... The quantification of phenolic content was obtained using a total phenolic content assay. The principle of the total phenolic content assay is an oxidation-reduction reaction based on the redox properties of an antioxidant compound, which can react with the Folin-Ciocalteau reagent to enhance the measurement of the phenolic concentrations (Norshazila et al. 2010). The calibration equation y = 0.00458x + 0.0457(R2 = 0.9997), where y is the absorbance and x is the weight of the gallic acid present, was used to generate the standard curve for gallic acid. ...
