Effect of roasting treatments on total phenol, antioxidant activity, fatty acid compositions and phenolic compounds of teff grains

2021 ◽  
Author(s):  
Isam A. Mohamed Ahmed ◽  
Nurhan Uslu ◽  
Fahad Al Juhaimi ◽  
Mehmet Musa Özcan ◽  
Magdi A. Osman ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Fatty Acid ◽  
Phenolic Compounds ◽  
Total Phenol ◽  
Fatty Acid Compositions

Effect of microwave and oven roasting methods on total phenol, antioxidant activity, phenolic compounds, and fatty acid compositions of coffee beans

2020 ◽  
Vol 44 (11) ◽  
Author(s):  
Mohammed Saeed Alkaltham ◽  
Mehmet Musa Özcan ◽  
Nurhan Uslu ◽  
Ahmad Mohammed Salamatullah ◽  
Khizar Hayat
Keyword(s):  
Antioxidant Activity ◽  
Fatty Acid ◽  
Phenolic Compounds ◽  
Total Phenol ◽  
Coffee Beans ◽  
Fatty Acid Compositions

scholarly journals Determination of Antioxidant Activity, Phenolic Compound, Mineral Contents and Fatty Acid Compositions of Bee Pollen Grains Collected from Different Locations

2019 ◽  
Vol 63 (1) ◽  
pp. 69-79 ◽  
Author(s):  
Mehmet M. Özcan ◽  
Fahad Aljuhaimi ◽  
Elfadıl E. Babiker ◽  
Nurhan Uslu ◽  
Durmuş Ali Ceylan ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Fatty Acid ◽  
Phenolic Compounds ◽  
Pollen Grains ◽  
Total Phenolic ◽  
Mineral Contents ◽  
Pollen Sample ◽  
Perm Region ◽  
Fatty Acid Compositions

AbstractThe objective of the present work was to investigate the influence of locations on bioactive propertiest, phenolic compounds and mineral contents of bee pollens. The oil content of pollen grains changed between 3.50% (Alanya) and 6.85% (Russia-Perm Region). The highest total phenolic content (720 mg/100g) and antioxidant activity values (81.4%) were observed in pollens obtained from the Russia-Perm Region and Alanya districts, respectively. Additionally, the highest carotenoid was found in a pollen sample collected from Karaman (Sarıveliler) (98.6 mg/g). The major phenolic compounds were (+)-catechin (66.75-337.39 mg/100g) and quercetin (61.2-1221.7 mg/100g) in all pollen samples. The pollen samples were observed to be a significant source of potassium (3846-6287 mg/kg), phosphorus (2947-5010 mg/kg), calcium (1022-2424 mg/kg) and sulfur (1744-2397 mg/kg). All of the analysis results were significantly affected by supplying locations. The antioxidant activity values of pollens were found partly similar and varied depending on locations. The content of saturated fatty acid (palmitic) was high (20-30%) in the tested pollen samples but did not exceed the content of linoleic acid.

Influence of boiling on total phenol, antioxidant activity, and phenolic compounds of celery ( Apium graveolens L) root

2020 ◽  
Author(s):  
Ahmad Mohammed Salamatullah ◽  
Mehmet Musa Özcan ◽  
Mohammed Saeed Alkaltham ◽  
Nurhan Uslu ◽  
Khizar Hayat
Keyword(s):  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Total Phenol ◽  
Apium Graveolens

scholarly journals Antioxidant activity and total phenol content of blackberries cultivated in a highland tropical climate

2017 ◽  
Vol 39 (1) ◽  
pp. 43 ◽  
Author(s):  
Mayara Neves Santos Guedes ◽  
Rafael Pio ◽  
Luana Aparecida Castilho Maro ◽  
Fabíola Fonseca Lage ◽  
Celeste Maria Patto de Abreu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Phenolic Compounds ◽  
High Performance ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Total Phenol ◽  
Total Phenol Content ◽  
Phenol Content ◽  
Phenolic Contents

Blackberries are an important option for the diversification of fruit crops. However, there is currently no literature regarding plant cultivation in high-altitude tropical climates. Knowledge of the phenolic composition of blackberries is essential because variations in the levels of these components may exist between cultivars and may depend on environmental conditions. High performance liquid chromatography (HPLC) was used to evaluate the total phenol content of different blackberry cultivars (Arapaho, Brazos, Cainguangue, Cherokee, Choctaw, Comanche, Ébano, Guarani, Tupy and Xavante). Free radical scavenging activity in these cultivars was assayed using a DPPH test. The HPLC-UV chromatogram of blackberry fruit extracts at 280 nm revealed the presence of phenolic compounds. The results showed significant differences in the levels of phenolic compounds in the blackberry cultivars tested. Antioxidant activity was evaluated using the ABTS free radical and ranged from 2.7 ± 0.1 to 19 ± 2 μmole of Trolox equivalents per gram of sample (b.u.). These results are in good correlation with the phenolic contents of the blackberries tested. The Xavante blackberry cultivar had the highest levels of polyphenols that could be individually identified. Catechin polyphenols were found to be the main component in the blackberry varieties tested. 

scholarly journals Phenolic Compounds, Antioxidant Activity and Fatty Acid Composition of Roasted Alyanak Apricot Kernel

2021 ◽  
Vol 70 (5) ◽  
pp. 607-613
Author(s):  
Fahad Y. Al-Juhaimi ◽  
Kashif Ghafoor ◽  
Mehmet Musa Özcan ◽  
Nurhan Uslu ◽  
Elfadıl E Babiker ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Fatty Acid Composition ◽  
Fatty Acid ◽  
Phenolic Compounds ◽  
Acid Composition ◽  
Apricot Kernel
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