scholarly journals Estimation of total antioxidant capacity from diet and supplements in US adults

2011 ◽  
Vol 106 (2) ◽  
pp. 254-263 ◽  
Author(s):  
Meng Yang ◽  
Sang-Jin Chung ◽  
Chin Eun Chung ◽  
Dae-Ok Kim ◽  
Won O. Song ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Dietary Supplements ◽  
Total Antioxidant Capacity ◽  
Fruit Juices ◽  
Antioxidant Compounds ◽  
Daily Consumption ◽  
Department Of Agriculture ◽  
Vegetable Products ◽  
The Us ◽  
Total Antioxidant

Given the importance of dietary antioxidants in reducing the risks of chronic diseases, the present study aimed to estimate the intake of total antioxidant capacity (TAC) from diet and dietary supplements of US adults. We utilised the US Department of Agriculture flavonoid and proanthocyanidin databases, dietary supplement data and food consumption data of 4391 US adults aged 19+ years in the National Health and Nutrition Examination Survey 2001–2. In order to convert the intake data of individual antioxidant compounds to TAC values, the vitamin C equivalent (VCE) of forty-three antioxidant nutrients measured previously was also applied. Daily TAC averaged 503·3 mg VCE/d (approximately 75 % from diet and 25 % from supplements). The energy-adjusted daily TAC level from diet and supplements was higher in women (except for carotenoids), older adults, Caucasian (except for carotenoids), non-alcohol consumers (for vitamin E and proanthocyanidins), subjects with higher income (except for carotenoids) and higher exercise levels than their counterparts (P < 0·05). TAC was positively associated with daily consumption of fruits and fruit juices, vegetables and vegetable products, beverages, wines and teas (P < 0·001). Teas, dietary supplements, and fruits and fruit juices were the major sources of dietary TAC of the US population (28, 25 and 17 %, respectively), while the contribution of vegetables and vegetable products to TAC was minimal ( < 2 %). The present study indicates that antioxidant intake from various diet and supplements contributes to TAC status. TAC levels are different in sociodemographic subgroups of the US population. The relationship between TAC intake and risks of chronic disease warrants further investigation.

scholarly journals Estimation of carotinoid, antioxidant, and oxidant statusby biophotonic scanning in healthy and sick persons with risk factorsof atherosclerosis

2007 ◽  
Vol 6 (4) ◽  
pp. 31-36
Author(s):  
V. N. Kim ◽  
G. V. Krivulina ◽  
V. M. Shevelyev ◽  
T. Ye. Suslova ◽  
O. V. Gruzdeva ◽  
...  
Keyword(s):  
Cardiovascular Diseases ◽  
Antioxidant Capacity ◽  
Dietary Supplements ◽  
Total Antioxidant Capacity ◽  
Antioxidant Status ◽  
High Accuracy ◽  
Cardiovascular Risks ◽  
Total Antioxidant ◽  
Healthy Persons

High accuracy of biophotonic scanning in estimation of skin carotinoid score (SCS) and antioxidant status after 8-week period of correction by LifePak, MarineOmega, and Tegreen97 active dietary supplements is proved in 45 healthy persons with cardiovascular risks and in patients with cardiovascular diseases. SCS increased by 42.8% (p = 0.005) and total antioxidant capacity of blood (TAC) increased by 36.4% (p = 0.005) in health people; while in patients SCS increased by 47.4% (p = 0.001) and TAC increased by 30.3% (p = 0.008). The SCS accuracy in estimation of antioxidant status was 87%.

scholarly journals Optimization of High-Pressure Extraction Process of Antioxidant Compounds from Feteasca regala Leaves Using Response Surface Methodology

Molecules ◽  
2020 ◽  
Vol 25 (18) ◽  
pp. 4209
Author(s):  
Anca Becze ◽  
Vanda Liliana Babalau-Fuss ◽  
Cerasel Varaticeanu ◽  
Cecilia Roman
Keyword(s):  
Response Surface Methodology ◽  
Antioxidant Capacity ◽  
Response Surface ◽  
Total Antioxidant Capacity ◽  
Raw Materials ◽  
Extraction Process ◽  
Extraction Yield ◽  
Antioxidant Compounds ◽  
Operational Conditions ◽  
Total Antioxidant

Circular economy principles are based on the use of by-products from one operation as the raw materials in another. The aim of this work is to obtain extracts with high antioxidant capacity and resveratrol content for the superior capitalization of the biomass of Feteasca regala leaves obtained during vineyard horticultural operations in spring. In order to obtain a high-quality extract at an industrial level, an optimal extraction process is needed. Central composite design (CCD) was used for the experiment design, which contained three independent variables: the ratio of extraction solvent to solid matter, temperature (°C) and time (minutes). The evaluation of extracts was done by measuring the total antioxidant capacity of the extracts using photo-chemiluminescent techniques, and the resveratrol content using liquid chromatography. Process optimization was done using response surface methodology (RSM). Minitab software version 17.0 was used for the design of experiments and data analysis. Regression analysis showed that the model predicts 87.5% of the variation for resveratrol and 96% for total antioxidant capacity (TAC). The temperature had the biggest influence on the extraction yield. The optimal operational conditions for the extraction method applied had the following conditions: ratio e/m 2.92; 43.23 °C and 55.4 min. A maximum value of 34,623 µg ascorbic acid equivalent (AAE) /mL total antioxidant capacity and 182.4 µg/mL resveratrol content were obtained when the optimal extraction parameters where used. The values obtained in experiments proved that by using RSM an accurate model can be obtained for extraction of Feteasca regala leaves.

Prediction of Total Antioxidant Capacity of Fruit Juices Using FTIR Spectroscopy and PLS Regression

2011 ◽  
Vol 5 (3) ◽  
pp. 405-407 ◽  
Author(s):  
Loredana Florina Leopold ◽  
Nicolae Leopold ◽  
Horst A. Diehl ◽  
Carmen Socaciu
Keyword(s):  
Antioxidant Capacity ◽  
Ftir Spectroscopy ◽  
Total Antioxidant Capacity ◽  
Fruit Juices ◽  
Pls Regression ◽  
Total Antioxidant

Antioxidant capacity of fractions of alcoholic extracts of sugarcane leaves

2013 ◽  
pp. 165-169
Author(s):  
Juliana Aparecida de Souza-Sartori ◽  
Adna Prado ◽  
Lucimara Fernanda Veiga ◽  
Nathalia Torres ◽  
Severino Matias de Alencar ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Silica Gel ◽  
Plant Development ◽  
Final Stage ◽  
Total Antioxidant Capacity ◽  
Solvent Mixture ◽  
Antioxidant Compounds ◽  
Initial Stage ◽  
Total Antioxidant

Extraction of antioxidant compounds present in the top leaves of sugarcane at different stages of plant development showed that the most favorable phase for the extraction is the final stage of maturation of the plant. Flavonoid contents (5.98±0.32mg/mL) and relative antioxidant activity (AArel=257.49±16.94%) similar to the initial stage of maturation were found. Active compounds were chromatographically fractionated over silica gel and elution with solvents of increasing polarity. The antioxidant activity towards -carotene, and the sequestering activity of DPPH (1,1-diphenyl-2-picrylhydrazyl) radicals was determined. The fractions which had the highest total antioxidant capacity (TAC) were obtained from the elution of the solvent mixture: chloroform and ethanol. The results indicate that the top leaves of sugarcane are a possible source of bioactive compounds.

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.

Daily consumption of phenolics and total antioxidant capacity from fruit and vegetables in the American diet

2005 ◽  
Vol 85 (10) ◽  
pp. 1715-1724 ◽  
Author(s):  
Ock Kyoung Chun ◽  
Dae-Ok Kim ◽  
Nancy Smith ◽  
David Schroeder ◽  
Jae Taek Han ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Fruit And Vegetables ◽  
Daily Consumption ◽  
Total Antioxidant

Development and validation of an algorithm to establish a total antioxidant capacity database of the US diet

2010 ◽  
Vol 61 (6) ◽  
pp. 600-623 ◽  
Author(s):  
Anna Floegel ◽  
Dae-Ok Kim ◽  
Sang-Jin Chung ◽  
Won O. Song ◽  
Maria Luz Fernandez ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
The Us ◽  
Total Antioxidant ◽  
Development And Validation

Characterization of antioxidant compounds of red and white rice and changes in total antioxidant capacity during processing

2007 ◽  
Vol 51 (8) ◽  
pp. 1006-1019 ◽  
Author(s):  
Franca Finocchiaro ◽  
Barbara Ferrari ◽  
Alberto Gianinetti ◽  
Chiara Dall'Asta ◽  
Gianni Galaverna ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Antioxidant Capacity ◽  
Antioxidant Compounds ◽  
White Rice ◽  
Total Antioxidant
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