Mature chemical analysis methods for food chemical properties evaluation

Oliveira, Wellington da Silva; Neves, Daniela Andrade; Ballus, Cristiano Augusto

doi:10.1016/b978-0-12-814217-2.00005-6

Cited by 7 publications

(4 citation statements)

References 61 publications

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“…Table 3 shows that VP had about twice higher phenolic content and exerted three-to four-fold stronger DPPH and ABTS• + bleaching activities than LC. The differences in antioxidant potentials may result from the fact that F–C measures only the hydrophilic antioxidants, DPPH detects only those soluble in organic solvents, while ABTS• + determines both hydrophilic and hydrophobic samples ( Apak et al, 2007 ; da Silva Oliveira et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown exert anti-inflammatory activities and relieve oxidative stress via Nrf2 activation

Jeng

Yang

et al. 2020

Journal of Ethnopharmacology

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Ethnopharmacological relevance Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown have anti-inflammatory properties and are popularly used as complementary and alternative medicine in Asia. Aim of the study To investigate the underlying molecular mechanism and active chemicals in the ethanol extracts of V. patula (VP) and L. chinensis (LC). Materials and methods The inhibitory activities of VP and LC on lipopolysaccharide (LPS)-stimulated nitric oxide (NO) and interleukin-6 (IL-6) production were investigated in RAW264.7 macrophages and BV2 microglia. Downregulation of pro-inflammatory genes and upregulation of Nrf2 (NF-E2 p45-related factor 2)-ARE (antioxidant response element) pathway were investigated using RT-Q-PCR and Western blotting. Direct antioxidant capacities were measured using free radical scavenging and Folin-Ciocalteu assays. The flavonoids and triterpenes in VP and LC were identified by HPLC-ESI-MS. Results VP and LC inhibited NO and IL-6 production and suppressed iNOS, IL-6, IL-1β and CCL2 gene expression. VP and LC were potent direct antioxidants and effective indirect antioxidants assayed by Nrf2 activation and induction of heme oxygenase (HO)-1, glutamate-cysteine ligase modifier subunit (GCLM) and NAD(P)H quinone oxidoreductase 1 (NQO1). Three flavonoids including apigenin (1), luteolin (2) and chryseriol (3), and one triterpene betulinic acid (4) were found in VP; while compounds 1–4 and oleanolic acid (5) were in LC. Conclusion Anti-inflammatory and antioxidant activities of VP and LC may be in great part attributed to the identified Nrf2 activating compounds, which induce expression of Phase II enzymes and attenuate the upregulation of pro-inflammatory genes.

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Section: Resultsmentioning

confidence: 99%

Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown exert anti-inflammatory activities and relieve oxidative stress via Nrf2 activation

Jeng

Yang

et al. 2020

Journal of Ethnopharmacology

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“…Peroxide value is a parameter specifying oxygen content as peroxide, especially hydroperoxides [31,32]. Iodine value is a measure of total unsaturation of oils and fats [33,34]. It reflects oxidation ability.…”

Section: Resultsmentioning

confidence: 99%

Assessment of <i>Balanites aegyptiaca</i> and <i>Sesamum indicum</i> Artisanal Oils Quality and Vitamin Contents

Gueye¹,

Diaw²,

Ndiaye³

et al. 2022

SJAC

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In Senegal, artisanal vegetable oils trade is developing and Balanites aegyptiaca (desert date) as well as Sesamum indicum (sesame) are popular vegetal species. Present study focused on oils obtained from these two plants seeds. These oils have various applications such as for dietary and cosmetic purposes. Sampling carried out in Dakar region allowed collection of five oil samples for each specie, mainly in different districts shops or craft fairs. Their peroxide, acid, iodine and saponification values as well as volatile matter, tocopherols and vitamin A contents have been determined through reference methods described by International Organization for Standardization (ISO) or French Standardization Association (AFNOR). Obtained experimental data were compared with Codex Alimentarius standard and/or literature, since some parameters are not subject to specific regulation. Balanites aegyptiaca and Sesamum indicum oil samples showed an orange-yellow or pale yellow coloration. Only one desert date oil sample had an adequate peroxide value while two from sesame were not compliant. Iodine values for B. aegyptiaca samples were closed to a result previously described by peer researchers for an oil produced from seeds harvested in Senegal but out of Codex specification range for sesame oils. All ten samples had a suitable acidity, widely below maximum value of 4.0 mg KOH/g. Two sesame oil samples had correct saponification value. Among ten oil samples collected, eight showed a volatile matter content exceeding standard. Vitamin A had not been detected in any sample. Desert date oils tocopherols content were comprised between 975.38 and 1141.36 mg/kg and S. indicum samples met the standard indicating a tocopherols level in the range [330 -1010 mg/kg]. Present study results are not all conclusive and reinforce reservations about commercially available artisanal oils quality. However, literature review allows to state that oils physico-chemical properties and nutrient content vary greatly.

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“…Cellulose and hemicellulose contents were determined following the Van Soest Brazilian Archives of Biology and Technology. Vol.67: e24230183, 2024 www.scielo.br/babt method as described by Silva and Queiroz [21]. Carbohydrate content was determined by mass balance, as recommended by the Brazilian Health Regulatory Agency (ANVISA) resolution RDC n° 360, of December 23, 2013 [22].…”

Section: Chemical Characterization and Determination Of The Physical-...mentioning

confidence: 99%

Valorization of Wastes Generated in Organic Grape Processing

Zanini,

Silvestre,

Baldasso

et al. 2024

Braz. arch. biol. technol.

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The development potential of byproducts from wastes of grape processing can be a promising alternative due to environmental questions. Moreover, there is the possibility of using this material in the development of products with added value. In this study, the wastes of grape skin (GSk), grape seed (GSe), and defatted grape seed with skin fragments (DGS) from 'Ives noir' grape (Vitis labrusca L.), grown under organic farming conditions, had their chemical composition and physical-chemical properties evaluated. Parameters of chemical composition, contents of phenolic compounds, total anthocyanins, flavonoids, and minerals, the antioxidant capacity, and water sorption capacity were evaluated. The wastes of grape were also analyzed by FTIR and TG/DTG. All residues had a high fiber content (54.1 -74.3 wt.%), the DGS waste had the highest contents of phenolic compounds as flavonoids, and the GSk waste had the highest content of total anthocyanins. Antioxidant capacity values were higher in the ABTS + method, with no statistical difference. On the other hand, in the DPPH antioxidant assay, the DGS and GSe wastes had higher antioxidant activity; these wastes also had greater thermal stability. The GSk waste had the highest water sorption capacity. The results show that the wastes from grape processing have the potential to be reused in applications with more value added. HIGHLIGHTS• Up to a third of the grape produced for processing is discarded as waste, without valorization.• Wastes of grape processing are rich in compounds with biological activity.• This kind of waste is also rich in nutrients making it useful for plant fertilization.• Wastes from grape processing have the potential to be reused in applications with more added value.

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Mature chemical analysis methods for food chemical properties evaluation

Cited by 7 publications

References 61 publications

Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown exert anti-inflammatory activities and relieve oxidative stress via Nrf2 activation

Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown exert anti-inflammatory activities and relieve oxidative stress via Nrf2 activation

Assessment of <i>Balanites aegyptiaca</i> and <i>Sesamum indicum</i> Artisanal Oils Quality and Vitamin Contents

Valorization of Wastes Generated in Organic Grape Processing

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Mature chemical analysis methods for food chemical properties evaluation

Cited by 7 publications

References 61 publications

Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown exert anti-inflammatory activities and relieve oxidative stress via Nrf2 activation

Vernonia patula (Dryand.) Merr. and Leucas chinensis (Retz.) R. Brown exert anti-inflammatory activities and relieve oxidative stress via Nrf2 activation

Assessment of &lt;i&gt;Balanites aegyptiaca&lt;/i&gt; and &lt;i&gt;Sesamum indicum&lt;/i&gt; Artisanal Oils Quality and Vitamin Contents

Valorization of Wastes Generated in Organic Grape Processing

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Assessment of <i>Balanites aegyptiaca</i> and <i>Sesamum indicum</i> Artisanal Oils Quality and Vitamin Contents