Chemical, technological and in vitro antioxidant properties of mango, guava, pineapple and passion fruit dietary fibre concentrate.
TL;DR: Exotic fruit fibres obtained as co-products in the process to obtain juice may be considered a good source of natural compounds with significant antioxidant activity and a good correlation between total phenol content and antioxidant capacity.
About: This article is published in Food Chemistry.The article was published on 2012-12-01. It has received 324 citations till now. The article focuses on the topics: DPPH & ABTS.
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TL;DR: SEDF sieved with mesh sizes 100-150 can be used as functional ingredients due to its excellent physicochemical and functional properties and compared to AEDF and EHDF, SEDF had the highest total dietary fiber, crystalline regions, and water swelling capacity.
197 citations
Cites background from "Chemical, technological and in vitr..."
...Recent studies have reported that the physicochemical and functional properties of DFs, which are mostly derived from cereals, vegetables, and fruits (Abdul-hamid & Luan, 2000; Chau, Wang, & Wen, 2007; Fernando, Maria, Ana-Maria, Chiffelle, & Asenjo, 2005), depend on the food sources, extraction methods, chemical composition, structure, and particle size of DF (Martínez et al., 2012; Peerajit et al., 2012; Wuttipalakorn, Srichumpuang, & Chiewchan, 2009)....
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...…& Luan, 2000; Chau, Wang, & Wen, 2007; Fernando, Maria, Ana-Maria, Chiffelle, & Asenjo, 2005), depend on the food sources, extraction methods, chemical composition, structure, and particle size of DF (Martínez et al., 2012; Peerajit et al., 2012; Wuttipalakorn, Srichumpuang, & Chiewchan, 2009)....
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TL;DR: In this paper, the chemical composition, physico-chemical properties, technological properties, total phenol and flavonoid content, antioxidant properties and antibacterial properties of dietary fiber powder obtained from yellow passion fruit (Passiflora edulis var. flavicarpa) co-products (pulp and seeds or albedo) were determined.
158 citations
04 Sep 2018
TL;DR: In this paper, the authors present the potential of food waste and byproducts as a sustainable alternative to reduce malnutrition and hunger in developing countries; some examples and perspectives are mentioned, and the use of these biomaterials is a challenge and a great opportunity to improve food security.
Abstract: Food production and processing in developing countries generate high levels of waste and byproducts, causing a negative environmental impact and significant expenses. However, these biomaterials have ample potential for generating food additives and helping to minimize malnutrition and hunger in the developing countries where they are produced. Many of these biomaterials are a source of valuable compounds such as proteins, lipids, starch, micronutrients, bioactive compounds and dietary fibers. Additionally, antinutritional factors present in some byproducts can be minimized with biotech alternatives for use as a food additive or in the formulation of balanced foods. In this context, the use of these biomaterials is a challenge and a great opportunity to improve food security. The purpose of this review is to present the potential of food waste and byproducts as a sustainable alternative to reduce malnutrition and hunger in developing countries; some examples and perspectives are mentioned.
157 citations
TL;DR: Xylan based oligosaccharides possess bound phenolics including ferulic acid, coumaric acid, thus imparting additional antioxidant effect and immunomodulatory activity, and the health benefits of xylooligosACcharides are discussed.
145 citations
TL;DR: P pineapple pomace had low fat and high dietary fibre, showing its potential for fibre enrichment of nutritionally poor products, as some extruded snacks, and low microbiological counts, water activity, and pH indicating good microbiological quality and low risk of physicochemical deterioration.
134 citations
Cites background or result from "Chemical, technological and in vitr..."
...The protein value obtained in this study was similar to the protein content of the pineapple co-product (peel and heart) studied by Martínez et al. (2012) (4%)....
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...The protein value obtained in this study was similar to the protein content of the pineapple co-product (peel and heart) studied by Martínez et al. (2012) (4%). The pomace had low fat content (0.61 ± 0.14%) (Table 2), which is in agreement with the 0.69% reported by Sousa, Vieira, Silva, and Lima (2011) for pineapple residue obtained from a fruit pulp industry....
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...About 76% of pineapple byproduct (peel and heart) is fibre, from which 99.2% is the insoluble fraction and 0.8% is the soluble fraction (Martínez et al., 2012)....
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...(Martínez et al., 2012)....
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References
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TL;DR: The antiradical properties of various antioxidants were determined using the free radical 2,2-Diphenyl-1-picrylhydrazyl (DPPH*) in its radical form as discussed by the authors.
Abstract: The antiradical activities of various antioxidants were determined using the free radical, 2,2-Diphenyl-1-picrylhydrazyl (DPPH*). In its radical form. DPPH* has an absorption band at 515 nm which dissappears upon reduction by an antiradical compound. Twenty compounds were reacted with the DPPH* and shown to follow one of three possible reaction kinetic types. Ascorbic acid, isoascorbic acid and isoeugenol reacted quickly with the DPPH* reaching a steady state immediately. Rosmarinic acid and δ-tocopherol reacted a little slower and reached a steady state within 30 min. The remaining compounds reacted more progressively with the DPPH* reaching a steady state from 1 to 6 h. Caffeic acid, gentisic acid and gallic acid showed the highest antiradical activities with a stoichiometry of 4 to 6 reduced DPPH* molecules per molecule of antioxidant. Vanillin, phenol, γ-resorcylic acid and vanillic acid were found to be poor antiradical compounds. The stoichiometry for the other 13 phenolic compounds varied from one to three reduced DPPH* molecules per molecule of antioxidant. Possible mechanisms are proposed to explain the experimental results.
18,907 citations
Journal Article•
TL;DR: In this paper, the use of Folin-Ciocalteu reagent rather than the FolinDenis reagent, gallic acid as a reference standard, and a more reproducible time-temperature color development period was investigated.
Abstract: Several details of the assay of total phenolic substances have been investigated and an improved procedure developed. The improvements include the use of Folin-Ciocalteu reagent rather than the Folin-Denis reagent, gallic acid as a reference standard, and a more reproducible time-temperature color development period. The values obtained are less subject to variation and interference from several nonphenols, yet are directly comparable to the "tannin" values obtained by the previously standard method.
18,629 citations
TL;DR: The FRAP assay offers a putative index of antioxidant, or reducing, potential of biological fluids within the technological reach of every laboratory and researcher interested in oxidative stress and its effects.
17,394 citations
Book•
01 Jan 2006
TL;DR: In this article, the authors present official methods of analysis of AOAC International, official methods for analysis of aOAC-related project, and a set of methods for the analysis of their work.
Abstract: Official methods of analysis of AOAC International , Official methods of analysis of AOAC International , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
8,888 citations
TL;DR: Plant-derived phenolics represents good sources of natural antioxidants, however, further investigation on the molecular mechanism of action of these phytochemicals is crucial to the evaluation of their potential as prophylactic agents.
Abstract: Accumulating chemical, biochemical, clinical and epidemiological evidence supports the chemoprotective effects of phenolic antioxidants against oxidative stress-mediated disorders. The pharmacological actions of phenolic antioxidants stem mainly from their free radical scavenging and metal chelating properties as well as their effects on cell signaling pathways and on gene expression. The antioxidant capacities of phenolic compounds that are widely distributed in plant-based diets were assessed by the Trolox equivalent antioxidant capacity (TEAC), the ferric reducing antioxidant power (FRAP), the hypochlorite scavenging capacity, the deoxyribose method and the copper-phenanthroline-dependent DNA oxidation assays. Based on the TEAC, FRAP and hypochlorite scavenging data, the observed activity order was: procyanidin dimer>flavanol>flavonol>hydroxycinnamic acids>simple phenolic acids. Among the flavonol aglycones, the antioxidant propensities decrease in the order quercetin, myricetin and kaempferol. Gallic acid and rosmarinic acid were the most potent antioxidants among the simple phenolic and hydroxycinnamic acids, respectively. Ferulic acid displayed the highest inhibitory activity against deoxyribose degradation but no structure-activity relationship could be established for the activities of the phenolic compounds in the deoxyribose assay. The efficacies of the phenolic compounds differ depending on the mechanism of antioxidant action in the respective assay used, with procyanidin dimers and flavan-3-ols showing very potent activities in most of the systems tested. Compared to the physiologically active (glutathione, alpha-tocopherol, ergothioneine) and synthetic (Trolox, BHA, BHT) antioxidants, these compounds exhibited much higher efficacy. Plant-derived phenolics represents good sources of natural antioxidants, however, further investigation on the molecular mechanism of action of these phytochemicals is crucial to the evaluation of their potential as prophylactic agents.
1,293 citations