Polyphenols
Mostrando 13-24 de 214 artigos, teses e dissertações.
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13. Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution
Corrosive processes in acidic medium reduce the performance and durability of metallic materials, causing problems to several industries. Corrosion inhibitors are commonly used to decrease these effects. As these inhibitors must be ecologically friendly currently, this work evaluated the anticorrosive effect of natural extracts of coffee husks (Coffea arabic
Mat. Res.. Publicado em: 09/12/2019
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14. Physical-chemical and chemical characterization of Passiflora cincinnata Mast fruits conducted in vertical shoot positioned trellis and horizontal trellises system
Resumo Passiflora cincinnata Mast., conhecida como maracujá da caatinga ocorre no Semiárido nordestino, Goiás, Minas Gerais e na Bahia. A região de cultivo e os sistemas de manejo das espécies do gênero Passiflora podem interferir na qualidade físico-química dos frutos. Objetivou-se avaliar características físico-química e química dos frutos de
Rev. Bras. Frutic.. Publicado em: 05/12/2019
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15. Does Lycium europaeum leaf have antihyperglycemic, antihyperlipidemic and antioxidant effects
The purpose of the present investigation is to assess, for the first time, the antidiabetic, antihyperlipidemic and antioxidant activities of Lycium europaeum extract in alloxan-induced diabetic rats. Diabetes was induced in adult male Wistar rats via a single subcutaneous alloxan injection (120 mg/kg). Lycium europaeum aqueous extract was orally administere
Braz. J. Pharm. Sci.. Publicado em: 07/11/2019
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16. Different effects of heating and freezing treatments on the antioxidant properties of broccoli, cauliflower, garlic and onion. An experimental in vitro study
ABSTRACT BACKGROUND: Vegetables have some beneficial effects on human health due to their antioxidant compounds, like polyphenols. Cooking leads to many physical and chemical changes to plant structure that can alter the phytochemical compounds of vegetables. OBJECTIVES: To investigate the effects of heat treatment and freezing on the antioxidant propert
Sao Paulo Med. J.. Publicado em: 07/11/2019
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17. Determination of active compounds in raspberry leaf extracts and the effects of extract intake on mice
Abstract Twelve typical polyphenols in raspberry leaf powder (RLP), raspberry leaf extract 1 (RLE) and raspberry leaf extract 2 (RLE-H) were analyzed by HPLC-MS. The sum of their contents in three samples were in the following order: RLP (8.6 mg g-1) < RLE (35.0 mg g-1) < RLE-H (44.1 mg g-1). Ellagic acid and quercetin-3-O-glucuronide were the principal comp
Food Sci. Technol. Publicado em: 04/11/2019
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18. Goitrogenic/antithyroidal potential of moringa leaves (Moringa oleifera) and spinach (Spinacia oleracea) of Indian origin on thyroid status in male albino rats
Moringa leaves and spinach used as vegetables containing cyanogens and polyphenols having suspected antithyroidal activity; however, detailed studies in this aspect found unavailable. Goitrogenic/antithyroid potentiality of those plant foods of Indian origin was evaluated. To explore the goitrogenic/antithyroid effect of those plant foods cyanogenic glucosid
Braz. J. Pharm. Sci.. Publicado em: 24/10/2019
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19. QUÍMICA DO LÚPULO
Hops in the brewing process are important for the chemical and sensorial quality of beer. Hops give to the beer bitterness (due to the presence of humulones and lupulones), natural antioxidants (due to the presence of polyphenols) and flavor (due to the presence of volatiles and essential oils). In this paper, we present, for the first time in Portuguese, a
Quím. Nova. Publicado em: 21/10/2019
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20. Comparisons of the active components in four unripe raspberry extracts and their activites
Abstract Dried unripe raspberry of Rubus chingii, were prepared as the following four extracts: unpurified raspberry extract (URE), purified raspberry extract (PRE), URE after high temperature-high pressure (UPE-H, HTHP), and PRE after HTHP (PRE-H). The total polyphenolic contents (TPCs) and total flavonoid contents (TFCs) of the four extracts, as assessed b
Food Sci. Technol. Publicado em: 10/10/2019
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21. Sensory and chemical evaluation of tea brews prepared with the assistance of ultrasound
RESUMO: O objetivo do estudo foi verificar a atividade sensorial e fitoquímica (polifenóis, flavonóides e cafeína) de infusões de chá preto e verde empregando o ultrassom. As infusões produzidas com a aplicação de sonicação por 2 e 1 minutos foram as mais preferidas pela equipe de avaliação sensorial. A avaliação das infusões em termos de de
Cienc. Rural. Publicado em: 07/10/2019
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22. Contents of total phenolics and flavonoids in and antioxidant activity of Ilex paraguariensis leaves
Resumo: O objetivo deste trabalho foi avaliar diferentes solventes e tempos de extração de polifenóis com ultrassom, para quantificar os compostos fenólicos e flavonoides totais e a capacidade antioxidante em folhas de erva-mate (Ilex paraguariensis). O experimento foi realizado em delineamento inteiramente casualizado, em arranjo fatorial 8x3 (solvente
Pesq. agropec. bras.. Publicado em: 07/10/2019
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23. Influence of preparation procedures on the phenolic content, antioxidant and antidiabetic activities of green and black teas
The influence of common tea preparation procedures (temperature, infusion time, consumption time interval and tea bag/loose-leaf) and the type of water used, on the total phenolic content (TPC), the radical scavenging activity and the α-glucosidase inhibitory activity were assessed. Higher TPC and antioxidant activity were obtained when using lower minerali
Braz. J. Pharm. Sci.. Publicado em: 23/09/2019
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24. Dietary total antioxidant capacity as a preventive factor against depression in climacteric women
RESUMO Depressão é caracterizada por causar sofrimento físico ou psicológico e em muitos casos pode levar ao suicídio. Objetivo: avaliar a prevalência de depressão e sua possível relação com a capacidade antioxidante total da dieta (DTAC) e parâmetros nutricionais em mulheres climatéricas participantes de um programa universitário de extensão
Dement. neuropsychol.. Publicado em: 23/09/2019