Characterization of aromatic profiles in brazilian tropical wines determined by gas chromatography and multivariate statistical analysis.

Resumo

Characterization of aromatic profiles in brazilian tropical wines determined by gas chromatography and multivariate statistical analysis.

Tropical wines have been produced in Thailand, India, Venezuela and mainly in Northeastem Brazil. In Brazil, this activity started twenty-five years ago and has been studied only in the last years. In this Brazilian Area, between 8_90 parallel of the South Hemisphere, it is possible to have two or three harvests per year due to the high temperatures (annual average temperature of 26 "C), high luminosity and use of irrigation. Analytical composition of grapes and wines can vary strongly according to harvest date into a year, (wines elaborated in the first or second semester). The aim of this work was to determine metabolic fingerprints of white and red wines from two vintages of 2009, according to their aromatic profile, using gas chromatographyand multivariate statistical analyses. Wines were elaborated by traditional methods, in stainless steel tanks of 200 L, by controlling fermentations temperature for red and white wines and using antioxidants. After stabilization and bottling, wines were analyzed in triplicate using gas chromatography with flame ionization detecto r (OC-FID). PCA multivariate statistical analysis was applied on aromatic compounds data to discriminate between wine type and month of winemaking, and different clustering were formed. White and red tropical wines presented different aromatic compound concentrations; higher alcohols were more efficient to separate wine samples than volatile esters

Early induction of orthotropic shoots in Coffea canephora.

In Coffea canephora, the number of orthotropic shoots is directly related to plant yield. The objective of this study was to evaluate the vegetative and yield performance of Coffea canephora, from the botanical variety Conilon, under different management systems for early emission of orthotropic shoots. The experiment was carried out in Ouro Preto do Oeste, Rondônia, between November 2011 and May 2014. Three types of management techniques were tested for early induction of orthotropic shoots in coffee trees (T1 = bending of the orthotropic shoot; T2 = apical pruning of the orthotropic shoot, T3 = free growing). The experiment was conducted in a randomized block design with 20 replicates. Each block consisted of a clonal genotype (clone) from the Embrapa Coffee Breeding Program. The techniques pruning and apical pruning were efficient to induce early growth of orthotropic shoots in Coffea canephora, resulting in higher yield in the first commercial bean production

Recomendações técnicas para o cultivo do cajueiro anão-precoce na Região Meio-Norte do Brasil.

O objetivo desta publicação é orientar os produtores de caju sobre as tecnologias disponíveis para a exploração econômica da cajucultura nos diferentes ecossistemas da região Meio-Norte do Brasil.bitstream/item/80686/1/circular-50.PD

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

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Crescimento e produção de cultivares de feijoeiro sob inoculação com rizóbio em comparação à adubação nitrogenada.

Este trabalho teve o objetivo de avaliar o crescimento e a produção de grãos de oito cultivares de feijoeiro, comparando o desempenho das plantas inoculadas com rizóbio com as plantas adubadas com N mineral

Observation of Replica Symmetry Breaking in the 1D Anderson Localization Regime in an Erbium-Doped Random Fiber Laser

The analogue of the paramagnetic to spin-glass phase transition in disordered magnetic systems, leading to the phenomenon of replica symmetry breaking, has been recently demonstrated in a two-dimensional random laser consisting of an organic-based amorphous solid-state thin film. We report here the first demonstration of replica symmetry breaking in a one-dimensional photonic system consisting of an erbium-doped random fiber laser operating in the continuous-wave regime based on a unique random fiber grating system, which plays the role of the random scatterers and operates in the Anderson localization regime. The clear transition from a photonic paramagnetic to a photonic spin glass phase, characterized by the probability distribution function of the Parisi overlap, was verified and characterized. In this unique system, the radiation field interacts only with the gain medium, and the fiber grating, which provides the disordered feedback mechanism, does not interfere with the pump

Concentração de carboidratos e umidade em raízes de mandioca açucarada (Manihot esculenta Crantz) Pará.

Objetivou-se quantificar as concentrações dos açucares: glicose, frutose e sacarose, o teor de amido e a umidade de genótipos de mandioca açucarada mantidos no Banco Ativo de Germoplasma (BAG) da Embrapa Amazônia Oriental. A concentração de glicose variou de 0,94% no genótipo 9 a 2,02 % no genótipo 05; a concentração de frutose variou de 0,70% no genótipo 02 a 1,53 % no genótipo 03; e para sacarose a variação foi de 0,15% nos genótipos 01 e 14 a 1,31% no genótipo 05. Portanto, o açúcar em maior concentração foi a glicose, seguido da frutose e sacarose, com médias de 1,33%, 0,88% a 0,51%, respectivamente. O genótipo 05 apresentou as maiores concentrações de glicose, frutose e sacarose. O teor de amido variou de 4,36% a 9,53% nos genótipos 15 e 7, respectivamente, apresentando média geral de 5,78 %. Os valores de umidade foram elevados com variação de 77,25% a 93,70% nos genótipos 13 e 14, respectivamente, sendo a média de 89,46%. Assim, no geral, a quantidade de açucares disponível para serem fermentados é em torno de 5% e, portando sendo o possível de serem obtidos rendimentos razoáveis quando comparada a outras espécies que são utilizadas para obtenção de etanol