scholarly journals Identification and Quantification of Phenolic Compounds in Bambangan (Mangifera pajangKort.) Peels and Their Free Radical Scavenging Activity

2011 ◽  
Vol 59 (17) ◽  
pp. 9102-9111 ◽  
Author(s):  
Fouad Abdulrahman Hassan ◽  
Amin Ismail ◽  
Azizah Abdulhamid ◽  
Azrina Azlan
Keyword(s):  
Free Radical ◽  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Free Radical Scavenging Activity ◽  
Scavenging Activity ◽  
Identification And Quantification

scholarly journals Phenolic compounds and antioxidant activity of different parts of three mandarin varieties extracts: A comparative study

2020 ◽  
Vol 4 (8) ◽  
pp. 318-324
Author(s):  
Makhlouf Chaalal ◽  
iham Ydjedd ◽  
Sana Mansouri
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Free Radical Scavenging ◽  
Free Radical Scavenging Activity ◽  
Scavenging Activity ◽  
Different Parts

Background: Mandarin by-products, such as peels and seeds, are considered as one of the naturel source of phenolic compounds. Aim: The objective of the present study was to compare the phenolic compounds contents and antioxidant activity of different parts (pulps, seeds, juices, and peels) of three mandarins varieties extracts. Material and methods: Total phenolic, flavonoid, and proanthocyanidin contents of the extracts were assessed while, the antioxidant activity was evaluated using three tests including ferric reducing power, free radical scavenging activity, and phosphomolybdate. Results: The Mediterranean Mandarin peels present a high total phenolics and flavonoids contents with values of 2445.62 mg GAE/100g FW and 609.78 mg QE/100g FW, respectively. Likewise, the clementine juice showed the highest proanthocyanins contents with value of 46.67 mg CE/100g FW. Seeds and pulps of the three varieties present the lowest phenolic compound contents. Mediterranean Mandarin juice showed a strong ferric reducing power and phosphomolybdate with values of 1270.91 and 190.19 mg AAE/100g FW, respectively, however, the peels reveled a strong free radical scavenging activity with value of 259.89 mg AAE/100 g FW. Statistical analysis showed a positive correlation between the antioxidant activity and the phenolic compounds contents of the three studied mandarins varieties extracts. Conclusion: Among the analyzed cultivars, Mediterranean mandarin variety may be considered as the most promising source of polyphenols and antioxidants, compared to the clementine and Satsuma varieties. Moreover, this study also highlights important properties of the fruit parts generally considered wastes. Keywords: Mandarins, different parts, phenolics compounds, antioxidant activity.

scholarly journals Phenolic compounds and antioxidant activity of different parts of three mandarin varieties extracts: A comparative study

2020 ◽  
Vol 4 (08) ◽  
pp. 318-324
Author(s):  
Makhlouf Chaalal ◽  
Siham Ydjedd ◽  
Sana Mansouri
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Phenolic Compounds ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reducing Power ◽  
Free Radical Scavenging ◽  
Free Radical Scavenging Activity ◽  
Scavenging Activity ◽  
Different Parts

Background: Mandarin by-products, such as peels and seeds, are considered as one of the naturel sources of phenolic compounds. Aim: The objective of the present study was to compare the phenolic compounds contents and antioxidant activity of different parts (pulps, seeds, juices, and peels) of three mandarins varieties extracts. Material and methods: Total phenolic, flavonoid, and proanthocyanidin contents of the extracts were assessed while, the antioxidant activity was evaluated using three tests including ferric reducing power, free radical scavenging activity, and phosphomolybdate. Results: The Mediterranean Mandarin peels present a high total phenolics and flavonoids contents with values of 2445.62 mg GAE/100g FW and 609.78 mg QE/100g FW, respectively. Likewise, the clementine juice showed the highest proanthocyanins contents with a value of 46.67 mg CE/100g FW. Seeds and pulps of the three varieties present the lowest phenolic compound contents. Mediterranean Mandarin juice showed a strong ferric reducing power and phosphomolybdate with values of 1270.91 and 190.19 mg AAE/100g FW, respectively, however, the peels revealed a strong free radical scavenging activity with value of 259.89 mg AAE/100 g FW. Statistical analysis showed a positive correlation between the antioxidant activity and the phenolic compounds contents of the three studied mandarins varieties extracts. Conclusion: Among the analyzed cultivars, the Mediterranean mandarin variety may be considered as the most promising source of polyphenols and antioxidants, compared to the clementine and Satsuma varieties. Moreover, this study also highlights important properties of the fruit parts generally considered wastes. Keywords: Mandarins, different parts, phenolics compounds, antioxidant activity.

scholarly journals Free Radical Scavenging Activity, Determination of Phenolic Compounds and HPLC-DAD/ESIMS Profile of Campomanesia Adamantium Leaves

2011 ◽  
Vol 6 (7) ◽  
pp. 1934578X1100600
Author(s):  
Aislan C.R.F. Pascoal ◽  
Carlos Augusto Ehrenfried ◽  
Marcos N. Eberlin ◽  
Maria Élida Alves Stefanello ◽  
Marcos José Salvador
Keyword(s):  
Antioxidant Activity ◽  
Free Radicals ◽  
Free Radical ◽  
Phenolic Compounds ◽  
Ethyl Acetate ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Free Radical Scavenging Activity ◽  
Scavenging Activity

Numerous diseases are induced by free radicals via lipid peroxidation, protein peroxidation and DNA damage. It has been known that a variety of plant extracts have antioxidant activity to scavenge free radicals. Campomanesia adamantium (Myrtaceae) is a small tree with edible fruit, commonly known as “guavira” or “guabiroba-branca” that has been used in popular medicine as depurative anti-diarrhoeic, anti-inflammatory, anti-rheumatic and to liver diseases. In this study, the antiradical activities of ethanol crude extract of the leaves from C. adamantium and the ethyl acetate and butanol fractions obtained by partition, were determined using DPPH (2,2-Diphenyl-1-picrylhydrazyl radical) and ORAC-FL (Oxygen Radical Absorbance Capacity) assays. The total phenol content in the samples was estimated by Folin Ciocalteau method (FCR). In an initial evaluation the ethanolic extract and the fractions ethyl acetate and butanol have shown levels of phenolic compounds between 15- 74 mg GAE/g in FCR assay, showed DPPH free-radical scavenging activity with SC50 in the range of 7.77-13.35 μg/mL and demonstrated antioxidant capacity between 2648-3502 μmol TE/g of extract and fractions in the ORAC-FL assay. HPLC-DAD and ESIMS analysis revealed were that the extract of the leaves of C. adamantium studied appears to contain flavonoids as major constituents, including isoquercetrin and quercetin that exhibit proven antioxidant activity.

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