Consulta: creatorFacets:"Borguini,Renata Galhardo"
Registros recuperados: 5
Data/hora: 05/06/2024 00:42:04

Acylated anthocyanins from organic purple-fleshed sweet potato (Ipomoea batatas (L.) Lam) produced in Brazil
Provedor de dados: 63
Autores: Jesus,Monalisa Santana Coelho de; Santiago,Manuela Cristina Pessanha de Araújo; Pacheco,Sidney; Gouvêa,Ana Cristina Miranda Senna; Nascimento,Luzimar da Silva de Mattos do; Borguini,Renata Galhardo; Guerra,José Guilherme Marinho; Espindola,José Antonio Azevedo; Godoy,Ronoel Luiz de Oliveira.
ABSTRACT Acylated anthocyanins from a purple-fleshed sweet potato (PFSP), obtained by organic cultivation in Brazil, were characterized after separation by a high performance liquid chromatography-diode array detector (HPLC-PDA). These anthocyanins were manually collected at the detector output, concentrated and injected into a high resolution mass spectrometer (ESI-QTOF-MS2). Twenty-two acylated anthocyanins were detected. Among them, sixteen had been reported in the literature and six, derived from peonidin were reported for the first time in sweet potato roots in this study. These compounds showed molecular ions with accurate mass/charge ratios (m/z) of 909.2081, 961.3010, 961.2571, 963.3345, 1123.2932 and 1179.3862. Although anthocyanins in PFSP have...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic; Mass spectrometry; Natural dye; Antioxidant.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000400901

Carotenoid extraction using edible vegetable oil: an enriched provitamin A product
Provedor de dados: 63
Autores: Borguini,Renata Galhardo; Pacheco,Sidney; Chávez,Davy William Hidalgo; Couto,Giovana Almeida; Wilhelm,Allan Eduardo; Santiago,Manuela Cristina Pessanha de Araújo; Nascimento,Luzimar da Silva de Mattos do; Jesus,Monalisa Santana Coelho de; Godoy,Ronoel Luiz de Oliveira.
ABSTRACT: Vitamin A deficiency is the third most important micronutrient deficiency having a significant impact on public health worldwide. The aim of this study was to develop a carotenoid extraction process with edible vegetable oils, using a central composite design which, concurrently, enriches the oils with provitamin A carotenoids. The stability of carotenoids in the oil and their shelf life was also evaluated. The process also aimed to meet the Recommended Daily Intake for vitamin A (600 μg retinol equivalent for an adult) with the enriched oil. The results showed that 20 % of the vegetable matrix (dried carrot) in vegetable oil and 5 min of extraction time was an optimum combination for both soy oil (64.43 μg retinol equivalent mL−1) and olive oil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Retinol; Food-to-food fortification; Oil shelf life; Carotenoid stability; Central composite design.
Ano: 2021
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000500901

SELEÇÃO ELETRÔNICA PELA COR NA DESCONTAMINAÇÃO DE AMENDOIM CONTAMINADO COM AFLATOXINAS
Provedor de dados: 63
Autores: Zovico,Cristiane; Fonseca,Homero; Calori-Domingues,Maria Antonia; Glória,Eduardo Micotti; Borguini,Renata Galhardo; Silveira,Vanessa Prezzotto; Piedade,Sônia S.
Quarenta e dois lotes comerciais de 300 kg de amendoim descascado, produzidos em 1997 e contaminados com aflatoxinas, foram submetidos à seleção eletrônica pela cor para verificar a eficiência desse processo na melhoria da qualidade de lotes de amendoim quanto à diminuição da contaminação com aflatoxinas. Os lotes de amendoim foram classificados pelo tamanho como normalmente utilizados pela cerealista, sendo 22 lotes de amendoim graúdo (7,5 a 7,9mm) e 20 lotes de amendoim miúdo (6,4 a 7,1mm), nos quais os níveis de contaminação inicial variaram de 7 a 3.763 mg/kg e de 76 a 3.309 mg/kg, respectivamente. Nos 42 lotes, não foram detectadas aflatoxinas em dois lotes de amendoim graúdo e 1 de amendoim miúdo. Este trabalho demonstrou que o processo de seleção...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aflatoxina; Amendoim; Seleção eletrônica.
Ano: 1999
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161999000200016

Microscale extraction method for HPLC carotenoid analysis in vegetable matrices
Provedor de dados: 63
Autores: Pacheco,Sidney; Peixoto,Fernanda Marques; Borguini,Renata Galhardo; Nascimento,Luzimar da Silva de Mattos do; Bobeda,Claudio Roberto Ribeiro; Santiago,Manuela Cristina Pessanha de Araújo; Godoy,Ronoel Luiz de Oliveira.
In order to generate simple, efficient analytical methods that are also fast, clean, and economical, and are capable of producing reliable results for a large number of samples, a micro scale extraction method for analysis of carotenoids in vegetable matrices was developed. The efficiency of this adapted method was checked by comparing the results obtained from vegetable matrices, based on extraction equivalence, time required and reagents. Six matrices were used: tomato (Solanum lycopersicum L.), carrot (Daucus carota L.), sweet potato with orange pulp (Ipomoea batatas (L.) Lam.), pumpkin (Cucurbita moschata Duch.), watermelon (Citrullus lanatus (Thunb.) Matsum. &amp;amp; Nakai) and sweet potato (Ipomoea batatas (L.) Lam.) flour. Quantification of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Β-carotene; Α-carotene; Lycopene.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000500011

Antioxidant potential of tomatoes cultivated in organic and conventional systems
Provedor de dados: 52
Autores: Borguini,Renata Galhardo; Bastos,Deborah Helena Markowicz; Moita-Neto,José Machado; Capasso,Fernanda Sobral; Torres,Elizabeth Aparecida Ferraz da Silva.
The objective of the study was to compare the effect of organic and conventional cultivation on the antioxidant compound content and antioxidant activity of the Carmen tomato cultivar. Tomatoes were analyzed regarding ascorbic acid, phenolic compounds, lycopene content and antioxidant activity. Organic tomatoes presented higher content of ascorbic acid and total phenolics (641.39 and 4466.66 mg/100 g EAG on dry wt basis) than did the conventional tomatoes (510.16 and 3477.50 mg/100 g EAG on wt dry basis, respectively). There was no difference in lycopene concentrations between the organic and conventional. The ether, alcohol and aqueous extracts obtained from the tomatoes were subjected to the DPPH test and the β-carotene/linoleic acid system assay. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antioxidant activity; Ascorbic acid; Lycopene; Phenolic compounds.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000400001