Total phenolics and flavonoids and total antioxidant capacity in pistachio (Pistachia vera L.) nuts in relation to cultivars and storage conditions

2011 ◽  
Vol 129 (4) ◽  
pp. 694-701 ◽  
Author(s):  
E. Tsantili ◽  
K. Konstantinidis ◽  
M.V. Christopoulos ◽  
P.A. Roussos
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Total Phenolics ◽  
Storage Conditions ◽  
Total Antioxidant ◽  
And Storage

scholarly journals Discrimination and prediction of polyphenolic compounds and total antioxidant capacity in sorghum grains

2019 ◽  
Vol 27 (1) ◽  
pp. 46-53 ◽  
Author(s):  
Michela Alfieri ◽  
Giovanni Cabassi ◽  
Ephrem Habyarimana ◽  
Fabrizio Quaranta ◽  
Carlotta Balconi ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Condensed Tannins ◽  
Near Infrared ◽  
Total Phenolics ◽  
Rapid Screening ◽  
Antioxidant Compounds ◽  
Total Flavonoids ◽  
Analysis Model ◽  
Total Antioxidant

One hundred and forty-seven sorghum samples, grown in 2015 and 2017, were used to build different near infrared spectroscopic calibration models able to predict total antioxidant capacity, total phenolics, total flavonoids and condensed tannins content. Samples were separated into calibration and validation sets using a nearest neighbours algorithm. The r2pred values ranged from 0.84 (condensed tannins) to 0.95 (total phenolics), whereas the Ratio of Performance to Deviation (RPD) values ranged from 1.9 (total flavonoids) to 3.0 (total phenolics). Comparison of prediction error estimates highlighted the best models with significant differences. Model robustness was tested through a reduction of sample numbers in the calibration set; the highest robustness was found for total antioxidant capacity and total flavonoids. In addition, a partial least squares discriminant analysis model to screen the samples for their tannins level was developed and resulted in good performance; it should be useful to select tannin-free genotypes for the food industry. These models could be used for rapid screening of sorghum breeding genotypes with high antioxidant compounds.

scholarly journals Antioxidant capacity and lipid stability egg during processing and storage.

2014 ◽  
Vol 4 (1) ◽  
pp. 19
Author(s):  
Michelle Garcêz Carvalho ◽  
Alfredo Tenuta Filho
Keyword(s):  
Oxidative Stability ◽  
Antioxidant Capacity ◽  
Lipid Fraction ◽  
Thiobarbituric Acid ◽  
Storage Conditions ◽  
Limit Of Quantification ◽  
Total Antioxidant ◽  
Processing And Storage ◽  
And Storage

<p>Different processing conditions, packaging and storage can affect the natural antioxidant protection of the egg. Thus, the objectives were: (a) To standardize a methodology able to evaluate in vitro antioxidant capacity of fresh and processed egg, (b) investigate the effect of pasteurization and spray on the oxidative stability of the lipid fraction of egg and (c) evaluate the antioxidant capacity and oxidative stability of fatty acids from whole egg pasteurized atomized, bottle of high density polyethylene, opaque, under nitrogen, at 5&plusmn;2&ordm;C for up to 90 days. The phosphomolybdenum method to measure the total antioxidant capacity of lipid fraction (CATL) Egg presented analytical adequacy, with a limit of quantification of 0.017 mg &alpha;-tocoferol/mL. The CATL decreased with the progress of processing and the reverse was observed for the lipids, 7-CETO (7-ketocholesterol) and TBARS (thiobarbituric acid reactive substances). The pasteurized egg atomized (OIPA) kept under ideal storage conditions considered stable in relation to hydration, CATL and TBARS. It is concluded that the method of phosphomolybdenum suitability presented analytical sufficient. Pasteurization did not affect any of the parameters evaluated, but the atomization caused significant decrease CATL, and elevated lipids, TBARS and 7-CETO. Was maintained hydration and stability of the lipid OIPA stored for 90 days at 5&deg;C, indicating that the conditions for packaging and storage were effective.&nbsp;</p><p>&nbsp;</p><p>DOI:&nbsp;<a href="http://dx.doi.org/10.14685/rebrapa.v4i1.102">http://dx.doi.org/<span>10.14685/rebrapa.v4i1.</span><span>102</span></a></p><p><span><br /></span></p>

Changes in Fruit Phenolic Composition and Antioxidant Capacity during Storage

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 469b-469 ◽  
Author(s):  
W. Kalt ◽  
C.F. Forney ◽  
J. McDonald
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Storage Period ◽  
Total Phenolic ◽  
Anthocyanin Content ◽  
Positive Health ◽  
Total Antioxidant ◽  
Health Quality ◽  
And Storage

Ripe fruit of strawberry, raspberry, and highbush and lowbush blueberries were stored at 0, 10, 20, or 30 °C for up to 8 days. Total phenolic and anthocyanin content was measured at regular intervals during the storage period as well as the total antioxidant capacity, using the method of Cao et al. (Clin. Chem. 1995, 41/12 1739 1744). There were significant differences in all parameters among the species, and after storage. Across all species and storage treatments, the antioxidant capacity was correlated with the content of phenolics (R = 0.77) and anthocyanins (R = 0.85). Both species of blueberry had more than twice the antioxidant capacity of either raspberry or strawberry; antioxidant capacity of the highbush and low-bush blueberries did not change during storage. During storage at temperatures greater than 0 °C, anthocyanin content of raspberries and strawberries increased substantially, and this increase was accompanied by an increase in total antioxidant capacity. Since dietary antioxidants such as anthocyanin flavonoids have been suggested to have positive health benefits, postharvest anthocyanin formation may have a desirable effect on the health quality of certain fruit.

scholarly journals Influence of crop load on the yield and grape quality of Merlot and Vranac (Vitis vinifera L.) varieties in Trebinje vineyard

2021 ◽  
Vol 117 (4) ◽  
pp. 1
Author(s):  
Mersija DELIĆ ◽  
Fikreta BEHMEN ◽  
Saša MATIJAŠEVIĆ ◽  
Šaćira MANDAL ◽  
Saud HAMIDOVIĆ ◽  
...  
Keyword(s):  
Vitis Vinifera ◽  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Total Phenolics ◽  
Soluble Solids ◽  
Crop Load ◽  
Grape Quality ◽  
Total Antioxidant ◽  
The Impact

<p class="042abstractstekst">The aim of this study was to study the impact of crop load on the yield and grape quality of ‘Merlot’ and ‘Vranac’ (<em>Vitis vinifera</em> L.) in Trebinje vineyard. The crop load levels studied in this trial were 9 buds (V1) and 12 buds (V2) per vine at each variety trained on Lenz-Moser bilateral cordon system. The impact was determined by measurements of yield per vine and grape quality characterized by the contents of total soluble solids, titratable acidity, total phenolics, total flavonoids and by total antioxidant capacity. The measured parameters of grape quality of ‘Merlot’ and ‘Vranac’ were not influenced significantly by crop load levels. V2, compared to the V1, showed the potential for increasing grape yield only for Merlot variety under experimental conditions. The results of this study also showed a positive correlation between total phenolics/flavonoids and total antioxidant capacity of grape berries in both varieties, regardless of crop loads applied.</p>

scholarly journals Total Antioxidant Capacity and Total Phenolics Content of Phyllostachys Taxa Shoots

2015 ◽  
Vol 43 (1) ◽  
Author(s):  
András NEMÉNYI ◽  
Éva STEFANOVITSNÉ-BÁNYAI ◽  
Zoltán PÉK ◽  
Attila HEGEDŰS ◽  
Csaba GYURICZA ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Total Phenolics ◽  
Total Antioxidant ◽  
Phenolics Content
Sign in / Sign up

Export Citation Format

Share Document