Application of principal component and hierarchical cluster analysis to classify fruits and vegetables commonly consumed in Ireland based on in vitro antioxidant activity

Patras, Ankit; Brunton, Nigel P.; Downey, Gerard; Rawson, Ashish; Warriner, Keith; Gernigon, Gwénolé

doi:10.1016/j.jfca.2010.09.012

Cited by 149 publications

(90 citation statements)

References 32 publications

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“…A análise dos principais componentes (PCA) é uma análise multivariada que vem sendo muito utilizada em diversos estudos, mostrando a semelhança entre as amostras testadas através de uma matriz (Hossain et al, 2011;Patras et al, 2011;Campos et al, 2014). Para esta análise utilizou-se todos os dados obtidos nos doseamentos totais e as atividades antioxidantes em triplicata.…”

Section: Figura 2 Perfil Cromatográfico Das Extrações a Frio Das Frounclassified

Efeito de diferentes técnicas extrativas no rendimento, atividade antioxidante, doseamentos totais e no perfil por clae-dad de dicksonia sellowiana (presl.). Hook, dicksoniaceae

Oliveira

Zuchetto

Paula

et al. 2016

Rev. bras. plantas med.

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Efeito de diferentes técnicas extrativas no rendimento, atividade antioxidante, doseamentos totais e no perfil por clae-dad de dicksonia sellowiana (presl. ABSTRACT: Effect of different extraction techniques on the yield, antioxidant activity, total dosages, and profile by hplc-dad of Dicksonia sellowiana (Presl.). Hook, dicksoniaceae.The species Dicksonia sellowiana, popularly known as xaxim, is a fern native to the Americas and found in Brazil in the Atlantic Forest. In 2001, its use for making gardening pots was banned, and it was added to the IBAMA [Brazilian Institute of the Environment and Renewable Natural Resources] list as an endangered species. This paper describes the effect of different extraction techniques -including ultrasound, turbolysis, maceration, infusion, decoction, and soxhlet using ethanol and 70% hydroalcoholic solvent on its physical and chemical aspects. The yield of each extraction was evaluated, as well as the profile by HPLC-DAD, the polyphenol content, flavonoids, proanthocyanidins, and steroids, in addition to the antioxidant activities through the DPPH and phosphomolybdenum complex reduction methods. The data were statistically analyzed through standard deviation, Tukey, and PCA. The results showed that the soxhlet extraction using both solvents had the highest overall yield; however, the yield is not directly related to the increase in total bioactive content and antioxidant activities. Extractions by decoction and turbolysis using a hydroalcoholic solvent exhibited the best results in total content and antioxidant activity -results that are evident when evaluated through PCA, demonstrating that this solvent and these extractions are the most selective in the proposed study.

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Section: Figura 2 Perfil Cromatográfico Das Extrações a Frio Das Frounclassified

Efeito de diferentes técnicas extrativas no rendimento, atividade antioxidante, doseamentos totais e no perfil por clae-dad de dicksonia sellowiana (presl.). Hook, dicksoniaceae

Oliveira

Zuchetto

Paula

et al. 2016

Rev. bras. plantas med.

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“…PCA and HCA are the two most commonly used pattern recognition techniques for classification of objects into groups or clusters based on a statistical measure. They permit a relatively simple representation of similarities between samples on the basis of more-or-less complex analytical data (Patras et al, 2011).…”

Section: Citrus Samplesmentioning

confidence: 99%

“…clusters in terms of their nearness or similarity (Patras et al, 2011). When a given sample is taken as a point in the space defined by the variables, one can calculate the distance between this point and all the other points, thereby establishing a matrix that describes the proximity between all the samples studied.…”

Section: Citrus Samplesmentioning

confidence: 99%

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Rapid Classification of Citrus Fruits Based on Raman Spectroscopy and Pattern Recognition Techniques

Feng

Zhang

Zhu

2013

FSTR

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Citrus fruits are major agricultural products of China and they are rich sources of health beneficial substances. In this study, Raman spectroscopy as a rapid and non-destructive tool was employed to classify eight different citrus fruits. Baseline drift caused by fluorescence of organic compounds in the citrus samples interferes with the Raman signals. A polynomial fitting based method was adopted for baseline correction, which is a key factor both for Raman peaks assignment and subsequent pattern recognition. Principal component analysis (PCA) and hierarchical cluster analysis (HCA) were the two selected pattern recognition techniques. PCA showed the distribution of sweet oranges and mandarins, and HCA was a useful guide for detailed relationship between various citrus samples. The results demonstrated that Raman spectroscopy combined with pattern recognition techniques has substantial potential for discriminating varieties of citrus fruits.

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“…These are significant statistical methods used to reduce huge data and determine the association of trace elements [12]. It also assessed the amassing of trace elements through geological environment in the locally grown T. indica.…”

Section: Introductionmentioning

confidence: 99%

Factorial analysis of trace elements of Tamarindus indica with reference to Bela ophiolite

Naseem

Ul-Huda

Bashir

et al. 2014

International Journal of Basic and Applied Sciences

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Application of principal component and hierarchical cluster analysis to classify fruits and vegetables commonly consumed in Ireland based on in vitro antioxidant activity

Cited by 149 publications

References 32 publications

Efeito de diferentes técnicas extrativas no rendimento, atividade antioxidante, doseamentos totais e no perfil por clae-dad de dicksonia sellowiana (presl.). Hook, dicksoniaceae

Efeito de diferentes técnicas extrativas no rendimento, atividade antioxidante, doseamentos totais e no perfil por clae-dad de dicksonia sellowiana (presl.). Hook, dicksoniaceae

Rapid Classification of Citrus Fruits Based on Raman Spectroscopy and Pattern Recognition Techniques

Factorial analysis of trace elements of Tamarindus indica with reference to Bela ophiolite

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