Total phenolic, total anthocyanin and phenolic acid concentrations and antioxidant activity of purple-fleshed potatoes as affected by boiling. Journal of Food Composition and Analysis 2013, 30 (1) , 6-12. DOI: 10.1016/j.jfca.2012.12.001.
Total phenolic contents and antioxidant activity of palm oils and palm kernel oils at various refining processes Article in Journal of oil palm research 30 · December 2025 with 89 Reads
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The genus Phoenix is one of the most widely cultivated groups of palms around the world. The aim of this study was to determine the antioxidant activity and total phenolic compounds of 14 different varieties of date palm (Phoenix dactylifera L., Arecaceae) ...
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Five types of caneberries [evergreen blackberries (Rubus laciniatus), marionberries (Rubus ursinus), boysenberries (Rubus ursinus × idaeus), red raspberries (Rubus idaeus), and black raspberries (Rubus occidentalis)] were analyzed for antioxidant activity by measuring their oxygen radical absorbance capacity (ORAC). In addition, the berries were analyzed for total phenolics, anthocyanins ...
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The aim of the study was to characterize antioxidative properties and antiradical activity of the herbal syrups collection in Latvia. Spectrophotometry was used to characterize antioxidant properties of herbal syrups. Antiradical activity, total phenols and content of flavonoids were determined spectrophotometrically. The antiradical scavenging activity was measured by the DPPH (2.2-diphenyl-1 ...
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Natural antioxidants present in several medicinal plants are responsible for inhibiting the harmful effects of oxidative stress. These plants contain polyphenols and flavonoids that act as free radical scavengers and reduce oxidative stress and may be an alternative remedy to cure various harmful human diseases. This study aims to quantify the total phenolic and flavonoid contents (TPC and TFC ...
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Total phenolic and flavonoid contents and antioxidant properties of extracts and essential oils of the aerial parts of Teucrium polium growing in Tunisia were evaluated. Total phenolic and flavonoid contents of extracts ranged from 48.88±0.01 to 400.00±0.01 mg of GAE/g and from 2.75±0.01 to 38.85±0.04mg of QE/g, respectively.
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The highest values of both RP (153.03 mg/gDW) and TAC (21.96 mg/gDW) were observed at 12 WAP. Also, their changes during developmental stages were similar to phenolic compounds. The high positive correlation between antioxidant activity values and phenolic contents suggests a strong effect of these parameters in antioxidant effect of date seeds.
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Oil palm is one of the richest sources of antioxidants such as carotenoids, tocopherols, tocotrienols and phenolic compounds. This study quantified the amount of total phenolic content (TPC) and the antioxidant activity of crude to refined palm oil and palm kernel oil products obtained from palm oil mills. The TPC of
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The basil extracts contained appreciable levels of total phenolic contents and exhibited good DPPH radical scavenging capacity higher than that of essential oils. High correlation between antioxidant activity and total phenolic contents of basil extracts was observed. High variation in free radical scavenging activity of essential oils was found.
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The ranking of antioxidant activity was strongly dependent on both the test system and on the substrate demonstrating the need to examine activity in both aqueous and lipid systems. Significant antioxidant activity was seen in most olive fractions and this was related to phenolic content.
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Total phenolic contents and antioxidant activity of palm oils and palm kernel oils at various refining processes Article in Journal of oil palm research 30 · December 2025 with 89 Reads
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The extracts which showed relatively high antioxidant activity (ethanol and methanol) contained the highest amount of total phenolic compounds . It has been proven that antioxidant activity of plant extracts is mainly ascribed to the concentration of the phenolic compounds present in the plants (Heim, Taigliaferro, & Bobilya, 2002).
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Total Phenolic and Flavonoid Contents, Antioxidant and Antimicrobial Activity of Nepeta binaludensis Jamzad Extracts Article in Jundishapur Journal of Natural Pharmaceutical Products In Press(In
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Antioxidant activity of phenol and flavonoid contents of some Iranian medicinal the RBD-palm oil was similar to well-documented antioxidant activity. Total flavonoid content in
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Phenolic contents and antioxidant activity of ethanolic extract of Capparis spinosa. Several studies have shown close relationship between total phenolic contents and antioxidative activity of the Sayadi S. Oil content, phenolic profiling and antioxidant potential of Tunisian olive drupes. J Sci Food Agric. 2010; 90:1750–1758. doi: 10
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The total phenolic content of cold‐pressed oils is shown in Table 1. The highest total phenolic content was obtained in the pumpkin and hemp oils (2.5 and 2.4 mg/100 g, respectively). Grapeseed oil was characterized by the lowest total phenolic compound content (0.51 mg/100 g).
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PHENOLIC CONTENTS AND ANTIOXIDANT ACTIVITY OF SIX ALGERIAN DATE PALM (Phoenix dactyliferaL.) CULTIVARS Article (PDF Available) · July 2015 with 231 Reads
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The correlation between total phenolic and flavonoid content and antioxidant activity with the habitat conditions could help to establish foundation for further studies focusing on the development of safer and inexpensive natural antioxidants for their use in therapeutic
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TOTAL PHENOLIC CONTENTS AND ANTIOXIDANT ACTIVITY OF PALM OILS AND PALM KERNEL OILS AT Manuscript Submission. Article In Press. Early View. Search for: Search for: Most cited articles. The Future of Oil Palm as a Major Global Crop: Opportunities and Challenges. Life cycle assessment for oil palm fresh fruit bunch production from continued
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Phoenix dactylifera or date palm fruits are reported to contain natural compounds that exhibit antioxidant and antibacterial properties. This research aimed to study the effect of fruit chilling at 4 °C for 8 weeks, extract storage at −20 °C for 5 weeks, and extraction solvents (methanol or acetone) on total phenolic content (TPC), antioxidant activity and antibacterial properties of Saudi
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In this study, the leaves of Licuala spinosa were used to determine the total phenolic and flavonoid content as well as antioxidant activity of different crude extracts.
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Physiochemical properties and total phenolic content of date palm (Phoenix sylvestris (L.) Roxb) seed oil Grown in district Panjgur, Pakistan. Abdalla RSM, Albasheer AA, El-Hussein ARM, Gadkariem EA. 2012. Physico-chemical characteristics of date seed oil grown in Sudan. American Journal of Applied Sciences 9(7), 993-999.
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In the present study, we assessed for the first time the changes in the antioxidant capacity, total phenolic content, and polyphenolic composition of interspecific hybrid palm oil extracted from Elaeis oleifera × Elaeis guineensis (O × G, Coari × La Mé cultivar) during the fruit ripening process 18, 20, 22, and 24 weeks after anthesis. A progressive decrease (p < 0.05) of phenolic content
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In the present study, we assessed for the first time the changes in the antioxidant capacity, total phenolic content, and polyphenolic composition of interspecific hybrid palm oil extracted from Elaeis oleifera × Elaeis guineensis (O × G, Coari × La Mé cultivar) during the fruit ripening process 18, 20, 22, and 24 weeks after anthesis. A progressive decrease (p < 0.05) of phenolic content
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Physiochemical properties and total phenolic content of date palm (Phoenix sylvestris (L.) Roxb) seed oil Grown in district Panjgur, Pakistan. Abdalla RSM, Albasheer AA, El-Hussein ARM, Gadkariem EA. 2012. Physico-chemical characteristics of date seed oil grown in Sudan. American Journal of Applied Sciences 9(7), 993-999.
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investigated for their antioxidant activity by DPPH method. IC 50 for antioxidant activity ranged from 0.6-3.8 mg ml-1. Total phenolic content of the citrus spp. samples (based on folin Ciocalteu method) varied from 66.5 to 396.8 mg gallic acid equivalent/g of extract and flavonoids content (based on colorimetric AlCl3 method)
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and oil palm mesocarp (Neo et al., 2008) and areca seed (Zhang et al., (2009). The content of total phenolic in Nypa fruit, oil palm mesocarp and areca seed are comparable to Nypa leaves. The ethyl acetate fractions of mature and young leaves were exhibited the highest Table 1: Total phenolic content
Get PriceTotal phenolic content. Total phenolic content of the essential oil, nanocapsules and nanoemulsion was determined using the Folin-Ciocalteu reagent according to a method modified from that of
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dietary fiber composition, total phenolic compounds and antioxidant activity of dried orange peels were studied. Methanolic orange peel extract as a natural source of antioxidant was evaluated during 6 months storage of refined sunflower oil at ambient temperature. The total dietary fiber content in orange peels was 70.95%, with an
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AbstractThe present study was designed to examine the chemical composition of the essential oil, in vitro antioxidant activity and total phenolic and flavonoid content of extracts from plant parts (leaf, flower and stem) of Teucrium alyssifolium. The principle components of the essential oil were trans-β-caryophyllene (16.87%), ar-curcumene (11.43%) and bisabolene (11.06%), representing 39.36
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25-5-2017· Total Flavonoid Content (Procedure and Calculation) Performed by Mohammad Shah Hafez Kabir Founder and CEO, GUSTO A Research Group Chief Trainer at SAGE Research Training Centre B. Pharm
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A rapid Fourier transformed infrared (FTIR) attenuated total reflectance (ATR) spectroscopic method was applied to the determination of water content (WC), total phenol amount (TP) and antioxidant activity (ABTS.+) of virgin olive oils (VOO) and olive oils.Calibration models were constructed using partial least squares regression.
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Palm puree (PP) was developed from different breeds of oil palm fruit (Elaeis Guineensis) namely PP24 and PP99. Both PPs were labelled as PP24A, PP24B, PP99A and PP99B, where A consisted of 2 % mesocarp fibre (MF) with 98 % CPO, while B consisted of 5 % MF with 95 % CPO. Analysis on antioxidant activity using total phenolic content (TPC), total
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