Nutrient Composition, Antioxidant Capacity and Natural Products in Livingstone Potato (Plectranthus esculentus )

2015 ◽  
Vol 39 (6) ◽  
pp. 3050-3058 ◽  
Author(s):  
C.O. Eleazu ◽  
K.C. Eleazu
Keyword(s):  
Natural Products ◽  
Antioxidant Capacity ◽  
Nutrient Composition

Comparative study on nutrient composition and antioxidant capacity of potato based on geographical and climatic factors

2022 ◽  
pp. 101536
Author(s):  
Bing Zhang ◽  
Ayesha Murtaza ◽  
Aamir Iqbal ◽  
Jiao Zhang ◽  
Tingting Bai ◽  
...  
Keyword(s):  
Comparative Study ◽  
Antioxidant Capacity ◽  
Climatic Factors ◽  
Nutrient Composition

scholarly journals Re-evaluation of ABTS•+ Assay for Total Antioxidant Capacity of Natural Products

2015 ◽  
Vol 10 (12) ◽  
pp. 1934578X1501001 ◽  
Author(s):  
Jian-Wei Dong ◽  
Le Cai ◽  
Yun Xing ◽  
Jing Yu ◽  
Zhong-Tao Ding
Keyword(s):  
Natural Products ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Reaction Times ◽  
Universal Method ◽  
Stable Free Radical ◽  
Abts Assay ◽  
Total Antioxidant

2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt radical cation (ABTS•+) is a stable free radical frequently used for estimating the total antioxidant capacity (TAC) of natural products. The existing methods for ABTS•+ radical-scavenging activity assays are diverse in pre-diluting solvents and reaction time, which lead to errors in the TAC estimations. To develop an effective and universal method for estimating the ABTS•+ capacity accurately and reasonably, five pre-dilution solvents [methanol, ethanol, phosphate buffer (Na2HPO4-NaH2PO4, 200 mM, pH = 7.4), PBS buffer (Na2HPO4-NaH2PO4-NaCl, 200 mM, pH = 7.4), and distilled water] and different reaction times were investigated in ABTS•+ assays of five typical antioxidants. The results showed that the solvent effects were very significant. When using different pre-diluting solvents, different detection wavelengths should be selected. ABTS-+ assay could be measured within 2–10 min to obtain a rough result, which was mostly 6 min in the literature. However, full and accurate evaluation of antioxidant reactivity rather than capacity requires recording ABTS•+ loss continuously during the whole reaction period. The present study makes a recommendation for estimating the ABTS•+ capacity accurately and reasonably.

scholarly journals Research on an antioxidant capacity of honeys

2012 ◽  
Vol 59 (1) ◽  
pp. 265-269 ◽  
Author(s):  
Elżbieta Hołderna-Kędzia ◽  
Bogdan Kędzia
Keyword(s):  
Ascorbic Acid ◽  
Natural Products ◽  
Free Radicals ◽  
Antioxidant Capacity ◽  
Antioxidative Activity ◽  
Polyphenolic Compounds ◽  
Human Organism ◽  
Oxidation Activity ◽  
Harmful Action ◽  
Antioxidative Agents

Human organism is exposed to harmful action of free radicals which are produced as well endogenically as egzogenically. The oxidation activity of free radicals can lead to the conversion of systemic biomolecules. As a consequence, there is a threat of, many severe diseases. Antioxidative agents which occur in natural products (also in honey) raise a possibility of protection against the harmful action of above mentioned radicals. Polyphenolic compounds - flavonoids, phenolic acids and ascorbic acid - are the most important antioxidative agents. The research of many authors proves that honey, given orally, shows an antioxidative activity. The level of antioxidative agents in serum after the consumption of honey is high and surpasses the antioxidative activity of tea. Dark honeys (honeydew and heather) have considerably higher antioxidative activity in comparison to light ones (acacia, lime, polyfloral).

Microstructure, nutrient composition and antioxidant capacity of king palm flour: A new potential source of dietary fibre

2010 ◽  
Vol 101 (14) ◽  
pp. 5701-5707 ◽  
Author(s):  
Karina N. de Simas ◽  
Leila do N. Vieira ◽  
Rossana Podestá ◽  
Manoela A. Vieira ◽  
Ismael I. Rockenbach ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Dietary Fibre ◽  
Nutrient Composition ◽  
Potential Source
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