Phenolic composition and total antioxidant capacity of South African frozen concentrated orange juice as affected by varietal, seasonal and regional differences

2018 ◽  
Vol 99 (3) ◽  
pp. 1029-1037
Author(s):  
Cindy Hunlun ◽  
Dalene de Beer ◽  
Gunnar O Sigge ◽  
Jessy Van Wyk
Keyword(s):  
Antioxidant Capacity ◽  
South African ◽  
Orange Juice ◽  
Total Antioxidant Capacity ◽  
Regional Differences ◽  
Phenolic Composition ◽  
Total Antioxidant

Comparison of total antioxidant capacity and phenolic composition of some apple juices with combined HPLC–CUPRAC assay

2010 ◽  
Vol 120 (4) ◽  
pp. 1201-1209 ◽  
Author(s):  
Şeyda Karaman ◽  
Esma Tütem ◽  
Kevser Sözgen Başkan ◽  
Reşat Apak
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Phenolic Composition ◽  
Total Antioxidant

scholarly journals Phenolic Profile, Antioxidant and Anti-Proliferative Activities of Methanolic Extracts from Asclepias linaria Cav. Leaves

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 54
Author(s):  
José Alejandro Sánchez-Gutiérrez ◽  
Dafné Moreno-Lorenzana ◽  
Dioselina Álvarez-Bernal ◽  
Jacobo Rodríguez-Campos ◽  
José Roberto Medina-Medrano
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Ultra Performance Liquid Chromatography ◽  
Total Phenolic ◽  
Cytotoxic Activities ◽  
Scavenging Activity ◽  
Phenolic Composition ◽  
Alternative Source ◽  
Methanolic Extracts ◽  
Total Antioxidant

Asclepias linaria Cav. (Apocynaceae) is a shrubby plant endemic of Mexico which has been used in traditional medicine. However, the bioactive potential of this plant remains unexplored. In this study, the phenolic composition, antioxidant, and cytotoxic activities of A. linaria leaves were determined. In order to estimate the phenolic composition of the leaves, the total phenolic, flavonoid, and condensed tannins contents were determined. Furthermore, the antioxidant activity was measured by the scavenging activity of the 2,2-diphenyl-1-picrylhydrazyl (DPPH•) and 2,2′-azino-bis[3-ethylbenzothiazoline-6-sulphonic acid] (ABTS•+) radicals and the total antioxidant capacity. The phenolic compounds identified in the A. linaria leaves by ultra-performance liquid chromatography coupled to mass spectrometry (UPLC-MS) include phenolic acids, such as p-coumaric and ferulic acid, as well as flavonoids, such as rutin and quercetin. The leaves’ extracts of A. linaria showed a high scavenging activity of DPPH• and ABTS•+ radicals (IC50 0.12 ± 0.001 and 0.51 ± 0.003 µg/mL, respectively), high total antioxidant capacity values (99.77 ± 4.32 mg of ascorbic acid equivalents/g of dry tissue), and had a cytotoxic effect against K562 and HL60 hematologic neoplasia cells lines, but no toxicity towards the normal mononuclear cell line was observed. These results highlight the potential of A. linaria and could be considered as a possible alternative source of anticancer compounds.

Phenolic Composition and Total Antioxidant Capacity by Electrochemical, Spectrophotometric and HPLC‐EC Evaluation in Portuguese Red and White Wines

2019 ◽  
Vol 31 (5) ◽  
pp. 936-945 ◽  
Author(s):  
Isaíde de Araújo Rodrigues ◽  
Sara M. C. Gomes ◽  
Isabel Patrícia Garrido Fernandes ◽  
Ana Maria Oliveira‐Brett
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Phenolic Composition ◽  
White Wines ◽  
Total Antioxidant

scholarly journals Serum Lipoprotein (a) Levels in Black South African Type 2 Diabetes Mellitus Patients

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Jim Joseph ◽  
Farzana Ganjifrockwala ◽  
Grace George
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Antioxidant Capacity ◽  
South African ◽  
Total Antioxidant Capacity ◽  
Lipoprotein A ◽  
Black South African ◽  
Total Antioxidant

Lipoprotein (a) (Lp(a)) which is a low-density lipoprotein-like particle containing apo(a) is considered as an emergent cardiovascular risk factor. Type 2 diabetes mellitus (T2DM) is associated with a two- to threefold increase in the risk of cardiovascular disease (CVD). The aim of this study was to investigate the levels of Lp(a) in Black South African T2DM patients and its association with other metabolic factors. 67 T2DM patients and 48 healthy control participants were recruited for the cross-sectional study. The Lp(a) level was determined by ELISA and the result was analyzed using SPSS. The Lp(a) level in diabetics was found to be significantly increased (P=0.001) when compared to the normal healthy group. In the diabetic group, the Lp(a) levels correlated significantly with the duration of diabetes (P=0.008) and oxidized LDL (ox-LDL) levels (P=0.03) and decreased total antioxidant capacity (P=0.001). The third tertile of Lp(a) was significantly correlated with increased ox-LDL, C-reactive protein, and triglycerides and decreased total antioxidant capacity.

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