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 alpha-glucosidase inhibitory activity were assessed. Higher TPC and antioxidant activity were obtained when using lower mineralized waters. Tea bags also evidenced higher antioxidant activity than loose-leaf samples. Under the same conditions (90 degrees C and five minutes of infusion time) green tea contains almost twice the quantity of polyphenols and the free radical scavenging ability of black tea. In the alpha-glucosidase assay all infusions were active (97-100 %). Furthermore, HPLC allowed to identify some of the polyphenols present in both teas and to monitor their composition change with time. After twenty-four hours, the antioxidant activity was maintained without significant changes, but a small decrease in enzyme inhibition was observed, although this activity was still very high.info:eu-repo/semantics/publishedVersio

Use of agro-industry residues as substrate for the production of Euterpe precatoria seedlings.

The availability of single assai palm (Euterpe precatoria) seedlings with good quality is a fundamental requirement to expand the cultivation of the species. This study aimed to assess the use of fruit agro-industry residues as substrate for producing single assai seedlings. The experiment was carried out under nursery conditions, in a completely randomized design, with four replications and eight plants per plot. Fifteen treatments were evaluated: a commercial substrate, four dry and crushed agro-industrial residues (Brazil nut shell, acerola pit, assai pit and cupuassu peel) and ten combinations of these materials in the proportion of 1:1. The following variables were also measured: shoot height; stem diameter; number of leaves; shoot, root and total dry mass; and Dickson Quality Index score. The substrate formulated with Brazil nut shell + acerola pit stood out for promoting a higher growth and dry biomass, resulting in seedlings with a better quality. The pure assai pit residue was not efficient for producing seedlings, but it showed a good potential when mixed in equal proportion with other materials (e.g. Brazil nut shell and cupuassu peel). A disponibilidade de mudas de açaizeiro solteiro (Euterpe precatoria) de boa qualidade é requisito fundamental para a expansão do cultivo da espécie. Objetivou-se avaliar a utilização de resíduos de agroindústrias frutíferas como substrato para a produção de mudas de açaizeiro solteiro. O experimento foi conduzido em condições de viveiro, em delineamento inteiramente casualizado, com quatro repetições e oito plantas por parcela. Quinze tratamentos foram avaliados: um substrato comercial, quatro resíduos agroindustriais secos e triturados (casca de amêndoa de castanha-do-Brasil, caroço de acerola, caroço de açaí e casca de cupuaçu) e dez combinações desses materiais na proporção 1:1. Também foram mensuradas as seguintes variáveis: altura da parte aérea; diâmetro do colo; número de folhas; massa seca da parte aérea, raiz e total; e Índice de Qualidade de Dickson. O substrato formulado com casca de amêndoa de castanha-do-Brasil + caroço de acerola destacou-se por promover maior crescimento e biomassa seca, resultando em mudas de melhor qualidade. O resíduo de caroço de açaí puro não foi eficiente para a produção de mudas, mas apresentou bom potencial quando em mistura de igual proporção com outros materiais (p. ex. casca de amêndoa de castanha-do-Brasil e casca de cupuaçu)

Guardiões e guardiãs da agrobiodiversidade das regiões do Cariri, Curamataú e Seridó paraibano.

ref. 14455. Edição dos Resumos do VIII Congresso Brasileiro de Agroecologia, Porto Alegre, nov. 2013

Desempenho produtivo de cultivares de amendoim para a região Meio-Norte do Brasil.

bitstream/CPAMN-2010/24270/1/CT218.pd

Characterizations of complete linear Weingarten spacelike submanifolds in a locally symmetric semi-Riemannian manifold

In this paper, we deal with n-dimensional complete spacelike submanifolds Mn with flat normal bundle and parallel normalized mean curvature vector immersed in an (n + p)-dimensional locally symmetric semi-Riemannian manifold L_p^(n+p) of index p obeying some standard curvature conditions which are naturally satisfied when the ambient space is a semi-Riemannian space form. In this setting, we establish sufficient conditions to guarantee that, in fact, p = 1 and Mⁿ is isometric to an isoparametric hypersurface of L_1^(n+1)having two distinct principal curvatures, one of which is simple.The first author is partially supported by CAPES, Brazil. The second author is partially supported by CNPq, Brazil, grant 303977/2015- 9. The fourth author is partially supported by CNPq, Brazil, grant 308757/2015-7.peerReviewe

Assessment of genetic variability in sesame accessions using SSR markers and morpho-agronomic traits.

The genetic variability of thirty-six sesame accessions were evaluated using molecular and morpho-agronomic data, aiming to identify divergent genotypes for further use in breeding program. Ten SSR markers and twenty seven morpho-agronomic traits were used to estimate genetic divergence by means of multivariate Tocher and UPGMA methods. The GENES program was used for statistical analysis of data. We observed that molecular and morpho-agronomic data were efficient to estimate divergence among the accessions. In molecular aspect, the ZM_22, ZM_45 and ZM_34 markers showed broad contribution by presenting polymorphism rates of 0.53, 0.44 and 0.39, respectively. The groups formed in the Tocher model were not similar to those formed by the UPGMA method. Among the groups formed, the study of genetic diversity allowed identification of characteristics of interest such as precocity in the genotypes ABG 591 and ABG 649. The degree of similarity assembling revealed the most similar (ABG 591, ABG 616, ABG 649, ABG 141 and ABG 688) and identifying the most divergent (ABG 648 and ABG 200) genotypes. These results revealed significant genetic variability among the investigated accessions of the sesame ABG that can be applied in the breeding programs

Caracterização de acessos e híbridos de maracujazeiro por meio de descritores morfológicos.

Objetivou-se por meio deste trabalho a caracterização morfológica de híbridos interespecíficos e acessos de maracujazeiro do banco de germoplasma de maracujá da Embrapa Mandioca e Fruticultura (BAG-Maracujá). Foram caracterizados 79 híbridos interespecíficos (P. edulis x P. setacea) e sete acessos do BAG-Maracujá. Para a caracterização foram utilizados 22 descritores quantitativos e 32 qualitativos, sendo 21 referentes à parte foliar e 33 referentes à flor. Os dados foram submetidos à análise de diversidade utilizando-se como medida de dissimilaridade a distância de Gower e método de agrupamento UPGMA. A análise de cluster derivada dos dados morfológicos permitiu verificar uma ampla variabilidade genética entre os acessos e os híbridos de maracujazeiro avaliados. O coeficiente de correlação cofenético foi de 0,93, indicando um bom ajuste entre o dendrograma e a matriz de distância original. De modo geral, não houve um agrupamento com base nos grupos de cruzamentos realizados, o que pode ser justificado pelo fato de envolver apenas duas espécies nos cruzamentos interespecíficos. De maneira geral, há variabilidade nos acessos e híbridos avaliados, e estas informações podem ser úteis no direcionamento de cruzamentos visando obtenção de híbridos intra e interespecíficos