Flavonoids constitute a diverse group of secondary metabolites which are present in both fruits and wines. The contents of some of the most prominent compounds such as catechin and epicatechin are little known in wine...Flavonoids constitute a diverse group of secondary metabolites which are present in both fruits and wines. The contents of some of the most prominent compounds such as catechin and epicatechin are little known in wines prepared from tropical fruits. In this context, this study was aimed to determine catechin and epicatechin contents in wines processed from 7 tropical fruits (cajá-umbu, cashew apple, mangaba, pineapple, siriguela, sugar apple and umbu), by HPLC-DAD system. Moreover the total phenolic compounds content was also determined in these wines and compared to those of the commercial wines obtained from grapes and cashew apple. The wines produced in this work contained higher total phenolic compounds contents when compared to that of the grape wines. The higher values of total phenolic compounds were found in wines elaborated from cajá-umbu (123.4 mg·mL-1 GAE) and from cashew (87.5 mg·mL-1 GAE). However, higher contents of catechin and epicatechin were found in wines obtained from mangaba (14.01 ± 0.37 mg·L-1, 22.66 ± 1.03 mg·L-1), siriguela (9.97 ± 0.28, 4.38 ± 0.45) and cashew apple (7.46 ± 0.18, 1.30 ± 0.17) fruits. The present work indicates that the use of exotic tropical fruits is feasible in developing wines which could serve as functional foods as these contain appreciable quantities of catechin and epicatechin.展开更多
Essential oils are secondary metabolites produced by plants, can be extracted from any organ such as： leaves, branches, roots, rhizomes, flowers, fruits, seeds, wood and stem bark. The present study aimed to analyze ...Essential oils are secondary metabolites produced by plants, can be extracted from any organ such as： leaves, branches, roots, rhizomes, flowers, fruits, seeds, wood and stem bark. The present study aimed to analyze the compounds found in the essential oil of leafHancornia speciosa var. pubescens （C. Nees ＆ Mart.） MUll. Arg. （Apocynaceae）, popularly known as mangaba, and perform the soil chemical analysis of the occurrence of the same species. The oil was obtained by hydrodistillation in Clevenger from crushed leaves, their analysis was performed using the Shimadzu gas chromatograph model 2010 GC Ultra coupled to a mass spectrometer. The apofarnesol （48.45%）, naphthalene （4.84%）, ct-bisabolene （4.12%）, trans-i3-heptanone （2.34%）, spathulenol （1.48%）, cypermethrin were identified （1.35%） and malonic acid （1.34%）, which according to literature all these compounds have great insecticidal characteristics. Soil testing was performed according to the protocols of the S.L. Goi^nia/GO, which was found a soil poor in nutrient with acidic pH, these predominant features of the Cen：ado＇s soils, which can influence the biosynthesis of secondary metabolites. Concluding that Hancornia speciosa variety pubescens may have insecticidal activities.展开更多
基金support received from CNPq/INCT-FT and CAPES,Brazil in developing this research project.
文摘Flavonoids constitute a diverse group of secondary metabolites which are present in both fruits and wines. The contents of some of the most prominent compounds such as catechin and epicatechin are little known in wines prepared from tropical fruits. In this context, this study was aimed to determine catechin and epicatechin contents in wines processed from 7 tropical fruits (cajá-umbu, cashew apple, mangaba, pineapple, siriguela, sugar apple and umbu), by HPLC-DAD system. Moreover the total phenolic compounds content was also determined in these wines and compared to those of the commercial wines obtained from grapes and cashew apple. The wines produced in this work contained higher total phenolic compounds contents when compared to that of the grape wines. The higher values of total phenolic compounds were found in wines elaborated from cajá-umbu (123.4 mg·mL-1 GAE) and from cashew (87.5 mg·mL-1 GAE). However, higher contents of catechin and epicatechin were found in wines obtained from mangaba (14.01 ± 0.37 mg·L-1, 22.66 ± 1.03 mg·L-1), siriguela (9.97 ± 0.28, 4.38 ± 0.45) and cashew apple (7.46 ± 0.18, 1.30 ± 0.17) fruits. The present work indicates that the use of exotic tropical fruits is feasible in developing wines which could serve as functional foods as these contain appreciable quantities of catechin and epicatechin.
文摘Essential oils are secondary metabolites produced by plants, can be extracted from any organ such as： leaves, branches, roots, rhizomes, flowers, fruits, seeds, wood and stem bark. The present study aimed to analyze the compounds found in the essential oil of leafHancornia speciosa var. pubescens （C. Nees ＆ Mart.） MUll. Arg. （Apocynaceae）, popularly known as mangaba, and perform the soil chemical analysis of the occurrence of the same species. The oil was obtained by hydrodistillation in Clevenger from crushed leaves, their analysis was performed using the Shimadzu gas chromatograph model 2010 GC Ultra coupled to a mass spectrometer. The apofarnesol （48.45%）, naphthalene （4.84%）, ct-bisabolene （4.12%）, trans-i3-heptanone （2.34%）, spathulenol （1.48%）, cypermethrin were identified （1.35%） and malonic acid （1.34%）, which according to literature all these compounds have great insecticidal characteristics. Soil testing was performed according to the protocols of the S.L. Goi^nia/GO, which was found a soil poor in nutrient with acidic pH, these predominant features of the Cen：ado＇s soils, which can influence the biosynthesis of secondary metabolites. Concluding that Hancornia speciosa variety pubescens may have insecticidal activities.
