Effect of grape ( Vitis vinifera L.) varieties and harvest periods on bioactive compounds, antioxidant activity, phenolic composition, mineral contents, and fatty acid compositions of Vitis leave and oils

2020 ◽  
Vol 44 (11) ◽  
Author(s):  
Mehmet Gülcü ◽  
Kashif Ghafoor ◽  
Fahad Al‐Juhaimi ◽  
Mehmet Musa Özcan ◽  
Nurhan Uslu ◽  
...  
2019 ◽  
Vol 63 (1) ◽  
pp. 69-79 ◽  
Author(s):  
Mehmet M. Özcan ◽  
Fahad Aljuhaimi ◽  
Elfadıl E. Babiker ◽  
Nurhan Uslu ◽  
Durmuş Ali Ceylan ◽  
...  

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.


2020 ◽  
Vol 8 (2) ◽  
pp. 1075-1081 ◽  
Author(s):  
Irma Belinda Yossa Nzeuwa ◽  
Hui Xia ◽  
Yuanyuan Shi ◽  
Chao Yang ◽  
Muhammad Waseem Shah ◽  
...  

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