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| TREPTOW,TAÍSA CERATTI; FRANCO,FERNANDA WOUTERS; MASCARIN,LAURA GIZELE; HECKTHEUER,LUISA HELENA RYCHECKI; SAUTTER,CLÁUDIA KAEHLER. |
| ABSTRACT Grape juice has been widely studied due to the presence of phenolic compounds and its beneficial effects on human health. Ultraviolet irradiation C (UV-C) can increase the content of phenolic compounds and anthocyanins and contribute to sensory acceptability. The aim of this study was to evaluate the effect of different doses of ultraviolet irradiation C (UV-C) on ‘Trebbiano’, ‘Niagara Branca’, ‘Isabel’ and ‘Cabernet Sauvignon’ grapes, as well as effect of the storage period. Juices were elaborated and evaluated for physicochemical analyses, and for the sensorial analysis in irradiated samples. In ‘Niagara Branca’ and ‘Trebbiano’ cultivars, storage and irradiation promoted few physicochemical alterations, and sensorially, irradiation reduced the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitis labrusca; Vitis vinifera; Abiotic elicitor; Postharvest; Total polyphenols; Ordering test. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000300302 |
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| Klein,Fátima Rosane S.; Reis,Andressa; Kleinowski,Alítcia M.; Telles,Renata T.; Amarante,Luciano do; Peters,José A.; Braga,Eugenia Jacira B.. |
| ABSTRACT Ultraviolet B radiation has been described as a potential elicitor agent of the synthesis of secondary metabolites in plants. Thus, the present study aimed to investigate the production of betalains and total flavonoids, as well as the antioxidant activity, of Alternanthera sessilis, A. brasiliana, A. tenella and A. philoxeroides exposed to different periods of UV-B radiation (280-315 nm). Plants of these four species were exposed to UV-B radiation for 0, 2, 4, 6, and 8 hours, which amounts to 0, 10, 20, 30, and 40 J cm−2 of radiation, respectively. Significant increases in betacyanin and betaxanthin levels were observed in A. sessilis and A. brasiliana during the period of UV-B exposure, while no differences were observed for the others species.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic elicitor; Antioxidants; Flavonoids; Medicinal plants; Pigments; Ultraviolet radiation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400615 |
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