Aqueous extracts of 30 plants were investigated for their antioxidant properties using DPPH and ABTS radical scavenging capacity assay, oxygen radical absorbance capacity (ORAC) assay, superoxide dismutase (SOD) assay, and ferric reducing antioxidant potential (FRAP) assay. Total phenolic content was also determined by the Folin−Ciocalteu method. Antioxidant properties and total phenolic content differed significantly among selected plants. It was found that oak (Quercus robur), pine (Pinus maritima), and cinnamon (Cinnamomum zeylanicum) aqueous extracts possessed the highest antioxidant capacities in most of the methods used, and thus could be potential rich sources of natural antioxidants. These extracts presented the highest phenolic content (300−400 mg GAE/g). Mate (Ilex paraguariensis) and clove (Eugenia caryophyllus clovis) aqueous extracts also showed strong antioxidant properties and a high phenolic content (about 200 mg GAE/g). A significant relationship between antioxidant capacity and total phe...

https://faculty.missouri.edu/~glaserr/3700s14/Antioxidant_ORAC_et_al_jf803011r.pdf

Comparative study of antioxidant properties and total phenolic content of 30 plant extracts of industrial interest using DPPH, ABTS, FRAP, SOD, and ORAC assays.

Comparison of ABTS/DPPH assays to measure antioxidant capacity in popular antioxidant-rich US foods

Psidium guajava: a review of its traditional uses, phytochemistry and pharmacology.

Antioxidant activities of rosemary (Rosmarinus Officinalis L.) extract, blackseed (Nigella sativa L.) essential oil, carnosic acid, rosmarinic acid and sesamol

Total phenolic compounds and antioxidant capacities of major fruits from Ecuador

https://aggie-horticulture.tamu.edu/faculty/cisneros/Papers/Thaipong_2006.pdf

Comparison of ABTS, DPPH, FRAP, and ORAC assays for estimating antioxidant activity from guava fruit extracts

Feeding difficulties in cleft lip and palate (CLP) infants is commonly observed and is the most traumatic experience the family has to face. These infants are undernourished and have compromised growth. The purpose of this study was to 1) assess general health and growth parameters in children with CLP and in normal children; and 2) investigate the feeding methods of CLP infants and normal infants. A total of 221 children from birth to six years of both sexes, with CLP (60 children) and normal (161 children) were selected. The CLP and normal children were divided into three subgroups by age. The practice of feeding the infants in subgroup I was assessed using standard piloted questionnaires. The assessment of growth was done at baseline and at six months in all the subgroups.The general well being of the children was assessed by noting the number of common infections. Results showed that a significantly higher percentage of mothers with normal babies (p<0.01) had a positive attitude towards breast feeding. When compared to normal children, CLP children were more susceptible to infections (p<0.05) and measured significantly lower on the height growth curve(p<0.05). Hence, height can be used to monitor growth in CLP children.

/pdf/hydrophilic-and-lipophilic-antioxidant-activities-of-guava-24tn90vhp5.pdf

Hydrophilic and lipophilic antioxidant activities of guava fruits.

http://pirun.ku.ac.th/~agrkst/VarCom_guava.pdf

Genetic and environmental variance components in guava fruit qualities

Nine selected S3 papaya breeding lines were evaluated for their antioxidant properties and fruit quality. The 14 antioxidant properties and fruit quality traits measured in this study showed significant genotypic differences. KK80 showed the highest ascorbic acid content (114±20 mg/100 ml), antioxidant activity (8.0±1.3 μmol ascorbic acid equivalents/g fresh weight [FW]), and total phenolic compounds (72.2±5.8 mg gallic acid equivalents/100 g FW). KD7 contained the highest amounts of total flavonoid (21.0±5.8 mg catechin equivalents/100 g FW), lycopene (11.0±1.7 mg/100 g FW), and β-carotene (10.0±1.7 mg/100 g FW). The significant variation in antioxidant properties and fruit quality clearly shows the potential value of selected papaya breeding lines as new cultivars and parents in a breeding programme. Lycopene had a positive correlation with β-carotene (r = 0.62). Fruit size showed a negative correlation with total phenolic compounds (r = −0.64), antioxidant activity (r = −0.45), and ascorbic acid (r = −0.44). Flesh colour as hue angle was negatively correlated to lycopene (r = −0.67), suggesting that lycopene may be estimated indirectly by using the hue angle.

/pdf/antioxidant-properties-and-fruit-quality-of-selected-papaya-1vxynusum6.pdf

Kriengsak Thaipong

Papers

Comparison of ABTS, DPPH, FRAP, and ORAC assays for estimating antioxidant activity from guava fruit extracts

Hydrophilic and lipophilic antioxidant activities of guava fruits.

Genetic and environmental variance components in guava fruit qualities

Antioxidant properties and fruit quality of selected papaya breeding lines.

Correlations between fruit size and antioxidant contents in guava