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Full-Text Articles in Life Sciences

Biological Properties Evaluation And Chemical Profiles Of Phenolic Compounds In Muscadine Grapes (Vitis Rotundifolia), Qi You May 2012

Biological Properties Evaluation And Chemical Profiles Of Phenolic Compounds In Muscadine Grapes (Vitis Rotundifolia), Qi You

All Dissertations

Phenolic compounds, including anthocyanins in muscadines have attracted much attention due to their diverse biological activities. With bioassays of antioxidant activities in terms of total phenolic content (TPC), total flavonoid content (TFC) total anthocyanin content (TAC), total procyanidin content (TPA), oxygen radical absorbance capacity (ORAC), ABTS radical scavenging Activity (ABTS), ferric reducing antioxidant power (FRAP), and oil peroxidation inhibitory capacity of all muscadine samples, the muscadine grapes showed strong antioxidant activities. The liquid-liquid organic solvent extraction successfully separated the anthocyanins and other phenolics to different fractions. Strong linear relationship between responses of TPC, TAC and TPA versus their antioxidant activities ...


Determination And Comparison The Amount Of Toccopherolic And Phenolic Compounds And Fatty Acids Profile In Edible Nuts (Pistachio, Almond And Walnut) Oil, Amin Mousavi Khaneghah Mr, Amir Hossein Elhami Rad Dr Apr 2012

Determination And Comparison The Amount Of Toccopherolic And Phenolic Compounds And Fatty Acids Profile In Edible Nuts (Pistachio, Almond And Walnut) Oil, Amin Mousavi Khaneghah Mr, Amir Hossein Elhami Rad Dr

Amin Mousavi Khaneghah

The importance of function properties of edible nuts in inhibiting and decreasing of arteriosclerosis and cancer, and high consumption of these products in Iran, causes that this study investigates some functional properties of oils which are obtained from walnut, almond and pistachio in identified varieties of Damavand, C.V.B12 and Ahmad aghaee with 4% superiority, respectively. Studied factors were indication and measurement of phenolic and tocopherolic compounds by high performance liquid chromatography (HPLC), determination of oil oxidative stability in 110 0C, 120 0C and 130 0C by rancimat method, and identification fatty acid profile by Gas chromatography. Results showed ...


Effect Of Solvents On The Extractability Of Phenolic Constituents And Their Antioxidant Capacity From Irish Seaweed, Gaurav Rajauria, Amit Jaiswal, Nissreen Abu-Ghannam Apr 2012

Effect Of Solvents On The Extractability Of Phenolic Constituents And Their Antioxidant Capacity From Irish Seaweed, Gaurav Rajauria, Amit Jaiswal, Nissreen Abu-Ghannam

Conference papers

Seaweeds are being used for human consumption in the Orient and help them live longer with low levels of hypertension, cancer and other ailments. The study aimed at extraction of principle constituents using a wide range of solvents and their mixtures on the basis of polarity, from Irish brown seaweeds namely Himanthalia elongata, Laminaria saccharina and Laminaria digitata. All the extracts were screened for total phenolic content (TPC) and their potential antioxidant capacity, using 2, 2´-diphenyl-1-picrylhydrazyl (DPPH) radical and ferric reducing antioxidant power (FRAP) assay. Among all the solvents tested, 60% methanolic extract and equi-volume mixture of chloroform, diethyl ...


Water At Room Temperature As A Solvent For The Extraction Of Apple Pomace Phenolic Compounds, Sofia Reis, Dilip Rai, Nissreen Abu-Ghannam Jan 2012

Water At Room Temperature As A Solvent For The Extraction Of Apple Pomace Phenolic Compounds, Sofia Reis, Dilip Rai, Nissreen Abu-Ghannam

Articles

A fractionation method was used for the extraction of phenolic compounds from apple pomace (AP) involving a first extraction with water and subsequent extractions of the same residue with two different organic solvents. The water extracts obtained presented high amounts of phenolic compounds with high antioxidant capacity however, the second and third extractions of the same residue still extracted considerable amounts of remaining phenolic compounds with significant antioxidant capacities. Liquid chromatography – electrospray ionization mass spectrometry (LC-ESI/MS) studies showed water to be a good solvent to extract hydroxycinnamic acids, flavonols, flavanols, dihydrochalcones and flavones present in the AP. However, water ...


Apple Pomace As A Potential Ingredient For The Development Of New Functional Foods, Sofia Reis, Dilip K. Rai, Nissreen Abu-Ghannam Jan 2012

Apple Pomace As A Potential Ingredient For The Development Of New Functional Foods, Sofia Reis, Dilip K. Rai, Nissreen Abu-Ghannam

Conference papers

Apple pomace (AP) is the main by-product of cider industry being mainly composed of carbohydrates and dietary fibre, small amounts of protein, fat and ash. In addition AP is also a good source of phytochemicals such as phenolic acids and flavonoids making AP a valuable source of antioxidants. The common applications of this by-product are the direct disposal to soil in a landfill and for pectin recovery usage. These applications are not sufficient to drain the several tonnes produced every year and studies to valorise the AP for other purposes have gained momentum. AP due to its chemical composition, rich ...