scholarly journals Determination of Antioxidant Capacity, Total Phenolics and Antimicrobial Properties of Spray-Dried Guava Extract for Value-Added Processing

2014 ◽  
Vol 05 (09) ◽  
Author(s):  
Anil Kr Chauhan
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolics ◽  
Antimicrobial Properties ◽  
Value Added ◽  
Spray Dried

Value-Added Processing of Peanut Skins: Antioxidant Capacity, Total Phenolics, and Procyanidin Content of Spray-Dried Extracts

2012 ◽  
Vol 60 (43) ◽  
pp. 10776-10783 ◽  
Author(s):  
Karen E. Constanza ◽  
Brittany L. White ◽  
Jack P. Davis ◽  
Timothy H. Sanders ◽  
Lisa L. Dean
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolics ◽  
Value Added ◽  
Peanut Skins ◽  
Spray Dried

scholarly journals Antioxidant and Antimicrobial Properties of Semi-Processed Frozen Prickly Pear Juice as Affected by Cultivar and Harvest Time

Foods ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 235 ◽  
Author(s):  
Rosa Palmeri ◽  
Lucia Parafati ◽  
Elena Arena ◽  
Emanuela Grassenio ◽  
Cristina Restuccia ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Food Industry ◽  
Pathogenic Bacteria ◽  
Total Phenolics ◽  
Antimicrobial Properties ◽  
Prickly Pear ◽  
Total Polyphenols ◽  
Antimicrobial Potential ◽  
Good Antibacterial Activity ◽  
Foodborne Pathogenic Bacteria

Consumer interest toward natural ingredients is creating a growing trend in the food industry and research for the development of natural products such as colorants, antimicrobials and antioxidants. Semi-processed frozen prickly pear (Opuntia ficus-indica (L.) Mill.) juices (PPJs), obtained from three cultivars with white, red and yellow pulp, with different harvest times (“Agostani” and “Bastardoni”), were characterized for betalains, total phenolics, flavonoids, carotenoids, antioxidant capacity (by 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH)) and antimicrobial potential against foodborne pathogenic bacteria. Through chemical assays, PPJs showed high contents of total polyphenols, flavonoids and betalains and marked antioxidant capacity. PPJs from the first harvest (“Agostani”) revealed the significantly highest amount of polyphenols in white cultivar and of betacyanin and betaxanthin in yellow and red cultivars; antioxidant capacity was significantly higher in “Agostani” PPJs than in “Bastardoni” ones. Regarding antimicrobial potential, all PPJs revealed good antibacterial activity, particularly against Salmonella enterica as evidenced by the widest inhibition haloes. These results encourage the suitability of the first flowering prickly pear fruits, with low market value as fresh fruit but with high nutritional features, to be processed as semi-finished product. In particular, its use as ingredient in foods with high risk of Salmonella contamination may act as a natural preservative.

scholarly journals Investigation of Antioxidant Capacity and Some Bioactive Compounds of Iranian Pistachio (Pistachio vera L.) Cultivars

2012 ◽  
Vol 4 (4) ◽  
pp. 62-66
Author(s):  
Gholamhossein DAVARYNEJAD ◽  
Éva STEFANOVITS-BÁNYAI ◽  
Peter Tamas NAGY
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolics ◽  
Major Elements ◽  
Total Phenolic ◽  
Fresh Weight ◽  
Breeding Programs ◽  
Total Antioxidant ◽  
Health Promoting ◽  
Pistachio Nut

Edible nuts have an increasing role in human diet. Pistachio is a popular but less known kind of edible nut nevertheless it is rich in health benefiting nutrients, minerals, antioxidants and vitamins. Therefore, this study attempts to determine the antioxidants capacity, total phenolics and amount of some major elements (nitrogen, potassium, calcium and phosphorus), present in the most important Iranian pistachio nut, to enhance the health benefits, and use in breeding programs. For this reason eleven pistachio cultivars (‘Akbary’, ‘Ahmad Aghaii’, ‘Daneshmandi’, ‘Kalle Ghoochi 1’, ‘Kalle Ghoochi 2’, ‘Garmeh’, ‘Ohadi 1’, ‘Ohadi 2’, ‘Sefid’, ‘Momtaz’, and chance seedling tree ("None-grafted") as control) which are grown in commercial orchards of Fayzabad (Khorasan-e-Razavi) were analyzed for determination of some major elements, antioxidants capacity and total phenolics contents. The results showed that the amounts of the nutrients in 100 g kernel were within the following ranges: N 2.5-4.1 g, P 355.9-546.6 mg, K 573.6-994.9 mg and Ca 61.5-134.5 mg. Total phenolics content varied from 5.3-9.9 mg gallic acid equivalents in g fresh weight. The results also showed that the capacity of antioxidant ranged from 1.6-3.7 (mg ascorbic acid equivalents in g fresh weight). Weak correlation was observed between total phenolic content and total antioxidant capacity (r2=0.3824). The result demonstrates that there is adequate variation in major elements, antioxidants capacity and total phenolics contents within pistachio cultivars and hence there is potential for improvement towards enhancing these health-promoting photochemical in this nuts.

scholarly journals The Potential Use of a Food-Dyeing Plant Peristrophe bivalvis (L.) Merr. in Northern Vietnam

2016 ◽  
Vol 4 ◽  
pp. 14-26 ◽  
Author(s):  
Nguyen Van Quan ◽  
Do Tan Khang ◽  
Luan Thi Dep ◽  
Truong Ngoc Minh ◽  
Nakagoshi Nobukazu ◽  
...  
Keyword(s):  
Antioxidant Capacity ◽  
Total Phenolics ◽  
Extraction Methods ◽  
Northern Vietnam ◽  
Aqueous Solvent ◽  
Dpph Method ◽  
Current Usage ◽  
Yellow Orange ◽  
Potential Use

An investigation on the current usage status and experience in usingPeristrophe bivalvis(L.) Merr. was conducted in the mountainous region of Northern Vietnam. Five varieties were collected and recorded as a source of foodstuff-dyeing and medicinal plants on indigenous knowledge of ethnic minorities in the study area, of which, three varieties were dyed purple, one red and one yellow-orange; with two varieties being used for the treatment of haemoptysis, dysentery, liver disease, kidney failure, and jaundice. Two extraction methods using organic solvents and aqueous solvent were applied to spectrophotometrically investigate the phytochemical contents ofPeristrophe bivalvisvarieties. Accordingly, the coloration components ofPeristrophe bivalvisvarieties were contributed by a complex compound of photosynthetic pigments, anthocyanins, flavonoids. Also, the total phenolics, total flavonoids and effect of extraction methods, dissolved solutions (water and methanol) on these contents were assessed. Besides, screening antioxidant capacity ofPeristrophe bivalvisvarietieswas assayed by 1,1-diphenyl-2-picrylhydrazyl (DPPH) method which showed stronger radical inhibition of organic extractions than that of aqueous extractions. The results of determination of phytochemicals and antioxidant capacity support the knowledge and experience in usingPeristrophe bivalvisvarieties as natural dyeing production for food and pharmaceutical industry.

scholarly journals Determination of Selected Beneficial Substances in Peach Fruits

2021 ◽  
Vol 13 (24) ◽  
pp. 14028
Author(s):  
Martina Mrázová ◽  
Eliška Rampáčková ◽  
Petr Šnurkovič ◽  
Ivo Ondrášek ◽  
Tomáš Nečas ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Capacity ◽  
Prunus Persica ◽  
Total Phenolics ◽  
Total Acid ◽  
Analytical Properties ◽  
Colorimetric Measurements ◽  
Trolox Equivalent ◽  
Gallic Acid Equivalent

Peaches (Prunus persica L.) are a popular and sought-after dessert fruit. This is mainly due to their flavour, aroma, attractive appearance, and high content of substances that play an important role in human nutrition. The present study was carried out to determine some important analytical properties (sugars/sucrose, glucose, fructose and sorbitol), total acid, total phenolics, flavonoids, antioxidant capacity, carotenoids and anthocyanins of 34 selected peach varieties. The analyses are also complemented by colorimetric measurements of peach skin colour using CIELAB and other chromatic parameters. The results show, for example, that all peach varieties are good sources of phenolic compounds (9.43–577 mg gallic acid equivalent (GAE).100 g−1), flavonoids (1.12–95.1 mg catechin equivalent (CAE).100 g−1), and antioxidant capacity (136–462 mg Trolox equivalent (TE).100 g−1).

scholarly journals Evaluation of the Antioxidant and Antimicrobial Properties of in vitro Cultured Drosera intermedia Extracts

2009 ◽  
Vol 4 (8) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Tomás Grevenstuk ◽  
Sandra Gonçalves ◽  
Sara Almeida ◽  
Natacha Coelho ◽  
Célia Quintas ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Capacity ◽  
Antimicrobial Properties ◽  
Hexane Extract ◽  
Trolox Equivalent Antioxidant Capacity ◽  
Trolox Equivalent ◽  
Hexane Extracts ◽  
Diffusion Assay

Evaluation of the antioxidant activity of the methanol, water and n-hexane extracts of Drosera intermedia, determined by the Folin-Ciocalteau (F-C), trolox equivalent antioxidant capacity (TEAC) and oxygen radical antioxidant capacity (ORAC) assays showed that the methanol extract had the highest antioxidant activity (F-C: 378.6 ± 31.5 μmolGAE/mgextract; TEAC: 332.2 ± 29.1 μmolTE/mgextract; ORAC: 64.7 ± 7.8 μmolTE/mgextract). Antimicrobial activity was tested against seven bacterial and eight yeast strains using the agar diffusion assay, followed by the determination of minimum inhibitory concentrations (MIC). All tested D. intermedia extracts demonstrated strong antimicrobial properties with a broad spectrum of activity. However, the n-hexane extract exhibited much greater activity than water and methanol extracts. The most susceptible microorganisms to the n-hexane extract were Staphylococcus epidermidis ATCC 12228 and Candida albicans YP0175, for which a MIC value of 13.0 μg/mL was scored.

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