Correlações entre compostos fenólicos e atividade antioxidante em casca e polpa de variedades de uva de mesa

Souza, Angela Vacaro de; Vieira, Marcos Ribeiro da Silva; Putti, Fernando Ferrari

doi:10.1590/1981-6723.10317

Cited by 19 publications

(17 citation statements)

References 26 publications

(21 reference statements)

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“…This shows that the antioxidant capacity of the drugs is influenced by other compounds present in them. Some studies have shown a negative correlation between vitamin C content and antioxidant capacity [ 41 , 42 ]. Therefore, the individual and combined contribution of each component of the sample can be studied in the future.…”

Section: Resultsmentioning

confidence: 99%

Determination of the Antioxidant Activity of Samples of Tea and Commercial Sources of Vitamin C, Using an Enzymatic Biosensor

et al. 2021

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Antioxidants are synthetic or natural compounds capable of preventing or delaying oxidative damage caused by chemical species that can oxidize cell biomolecules, such as proteins, membranes, and DNA, leading to the development of various pathologies, such as cancer, atherosclerosis, Parkinson, Alzheimer, and other diseases serious. In this study, an amperometric biosensor was used to determine the antioxidant activity of teas and effervescent products based on vitamin C, available on the market. A sensor composed of three electrodes was used. The performance of the following electrochemical mediators was evaluated: meldola blue combined with Reineck salt (MBRS), Prussian blue (PB), and cobalt phthalocyanine (CoPC), as well as the time of polymerization in the enzymatic immobilization process and the agitation process during chronoamperometric measurements. Prussian blue proved to be more efficient as a mediator for the desired purposes. After optimizing the construction stages of the biosensor, as well as the operational parameters, it presented stability for a period of 7 months. The results clearly indicate that the biosensor can be successfully used to detect fraud in products called “antioxidants” or even in drugs containing less ascorbic acid than indicated on the labels. The detection limit was set at 4.93 µmol·L−1.

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Section: Resultsmentioning

confidence: 99%

Determination of the Antioxidant Activity of Samples of Tea and Commercial Sources of Vitamin C, Using an Enzymatic Biosensor

et al. 2021

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“…Frutas como acerola, uva e abacaxi foram indicadas assertivamente pelas entrevistadas (Figura 3), visto que essas frutas contêm níveis significativos de antioxidantes. Essas frutas apresentam quantidades satisfatórias de polifenóis e vitamina C (Souza et al, 2018;Seraglio et al, 2018;Galvão et al, 2019), podendo ser agregadas a produtos cosméticos que possam atuar de maneira eficaz contra o envelhecimento (Henrique & Lopes, 2017).…”

Section: Discussionunclassified

Uso de plantas para fins cosméticos por mulheres: uma alternativa sustentável

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Jesus

Marisco

2022

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O objetivo deste estudo foi identificar, por um levantamento etnobotânico, o comportamento de compra e frequência de uso de cosméticos, bem como as plantas utilizadas para esses fins. Essa pesquisa foi realizada por meio de questionários on-line destinado exclusivamente às mulheres. O questionário foi respondido por 59 mulheres com idade entre 18 e 30 anos. A maioria (77,2%) afirma que a internet, amigos e familiares são as principais influências para a escolha dos produtos que utilizam, sendo os produtos para o cabelo, higiene corporal e íntima os mais usados. As plantas acerola, uva, abacaxi, morango e caju foram as frutas reconhecidas com ação anti-idade contribuindo com a pele. A partir dessa pesquisa, foi possível observar que as mulheres carregam conhecimento cultural sobre plantas, entretanto muitos desses conhecimentos são a partir de redes sociais. Nessa perspectiva, esse saber não garante eficiência, tornando necessário o desenvolvimento de estudos que confirmem essa percepção popular. Infere-se a necessidade de estudos a fim de proporcionar segurança na sua utilização tanto para os consumidores como para o meio ambiente, seja na sua forma in natura ou em associação com cosméticos, associado com a preservação da biodiversidade de forma sustentável pode contribuir nas relações de saúde única.

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“…The general distance of Mahalanobis (D 2 ) was determined for the clustering analysis of blackberry fruits and jellies, by the mean linkage between group (UPGM) method. After it was determined, the cophenetic correlation coefficient (CCC) enabled the adjustment between the dissimilarity matrix and the dendrogram obtained (Cruz et al, 2014, Souza et al, 2018. A multivariate analysis was carried out by main components (PCA) to verify the grouping of the different responses of harvesting points of fresh blackberry fruits in natura and the jellies elaborated from them during the storage period, having variables of biochemical characteristics (anthocyanins, carotenoids, antioxidant activity through 2 different methods) and coloring (chroma 'L', 'a', 'b' and ºHue), simulating the relations between these variables (Vitolo et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Associations between pigments, antioxidant activity and coloring of blackberry fruits (Rubus sp.) and jellies through storage

et al. 2019

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The objective of this study was to investigate the relations between the amount of anthocyanins, carotenoids and the antioxidant activity measured by the FRAP and TEAC methods. Furthermore, pigments and the coloration of blackberry harvested fruits were measured at 3 different collection points then fruits stored in refrigerated environment and the jelly made from them, preserved in hermetically sealed glasses, without contact with light and temperature of 25ºC. In order to investigate the relations between the study variables (content of anthocyanins and carotenoids, antioxidant activity and coloration using digital colorimeter), Pearson’s correlation analysis was adopted, which indicates the existence of a positive or negative relation between two variables. The α = 5% (correlation coefficient) was used to verify the significance of the correlation. The Mahalanobis (D2) generalized distance for the clustering analysis by the mean linkage method between group of blackberry fruits and jellies was applied. Furthermore, the cophenetic correlation coefficient and multivariate analysis using major components were applied to verify the grouping of different responses of harvesting points of fresh blackberry fruit in natura and jellies. The results showed that there was correlation between the content of anthocyanins and carotenoids in fruits (0.99*) and between the same parameters in jellies. However, this behavior was not clearly observed between the pigments and the antioxidant activity. There was a positive correlation between the factors involved in the coloring of chroma fruits ‘L’, ‘a’, ‘b’ and ºHue in fruits and jellies. Blackberry jellies presented as good sources of anthocyanins and carotenoids.

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Correlações entre compostos fenólicos e atividade antioxidante em casca e polpa de variedades de uva de mesa

Cited by 19 publications

References 26 publications

Determination of the Antioxidant Activity of Samples of Tea and Commercial Sources of Vitamin C, Using an Enzymatic Biosensor

Determination of the Antioxidant Activity of Samples of Tea and Commercial Sources of Vitamin C, Using an Enzymatic Biosensor

Uso de plantas para fins cosméticos por mulheres: uma alternativa sustentável

Associations between pigments, antioxidant activity and coloring of blackberry fruits (Rubus sp.) and jellies through storage

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