Efeito da data de semeadura para duas cultivares contrastantes de feijão.

Nesse estudo, utilizou-se duas cultivares, a Radiante que apresenta ciclo curto e a Pérola, de ciclo médio, com o objetivo de avaliar a produtividade e seus componentes em quatro diferentes datas de plantio (15/06/2011; 29/06/2011; 13/07/2011 e 28/07/2011)

Reconfiguração de sistemas de distribuição utilizando fluxo de potência ótimo e análise de sensibilidade

This paper presents a new approach for distribution system reconfiguration (DSR) based on optimum power flow (OPF) in which the branch statuses (open/close) are represented by continuous functions. In the proposed approach, all branches are initially considered closed and from the OPF results a heuristic technique is used to determine the next loop to be broken by opening one switch. Then the list of switches that are candidates to be opened is updated and the above process is repeated until all loops are broken, making the distribution system radial. The paper includes results and comparisons on test systems utilized in three classical papers published in the technical literature, as well as in a previous paper by the authors. Results obtained on a real large scale distribution system are also presented.Este artigo apresenta uma nova metodologia de Reconfiguração de Sistemas de Distribuição (RSD) baseada na utilização do Fluxo de Potência Ótimo (FPO) no qual o status das chaves (aberto/fechado) é representado através de funções contínuas. Na metodologia proposta, todas as chaves são consideradas inicialmente fechadas e a partir dos resultados fornecidos pelo FPO, utiliza-se uma técnica heurística para determinar o próximo laço a ser quebrado através da abertura de uma chave. A lista de chaves candidatas a abertura é atualizada e o processo descrito anteriormente é repetido até que todos os laços sejam quebrados, tornando o sistema radial. Este trabalho apresenta resultados e comparações utilizando-se sistemas publicados em três artigos técnicos clássicos encontrados na literatura e em um artigo prévio do autor. Resultados obtidos em sistemas reais de distribuição também serão apresentados

Dados climatológicos: Estação de Fortaleza, 2000.

Para a pesquisa agropecuária, os dados coletados em estações climatológicas são de suma importância, uma vez que possibilitam o monitoramento do clima, bem como o leventamento dos seus efeitos sobre pragas e doenças nas culturas, a estimativa da evapotranspiração, do volume e dos turnos de irrigação, dentre muitas outras finalidades básicas.bitstream/CNPAT-2010/8999/1/Ba-025.pd

Knock-down of heat-shock protein 90 and isocitrate lyase gene expression reduced root-knot nematode reproduction.

Made available in DSpace on 2018-07-19T01:01:42Z (GMT). No. of bitstreams: 1 PHYTO09140237R.pdf: 775087 bytes, checksum: 95edcbc8a1ffecb0dac1b523acf37dd6 (MD5) Previous issue date: 2015-09-14bitstream/item/129546/1/PHYTO-09-14-0237-R.pd

Ecophysiological characterization of sorghum genotypes submitted to water deficit tolerance.

Sorghum [Sorghum bicolor (L.)] is one of the most drought tolerant cereal and many studies have been done to understand the mechanisms involved in this process. In this work, we evaluated in the greenhouse the effects of different levels of water stress on the ecophysiological characteristics and accumulation of soluble sugars in two contrasting sorghum [Sorghum bicolor (L.) Moench] inbred lines for drought tolerance: 9910032 (tolerant) and 9618158 (sensitive). Water stress was imposed in both genotypes at pre-flowering growth stage for two different time exposure: mild (6 days of drought); severe (12 days). Recovery treatments for each drought treatment were also done at six days after the stress. Sensitive and tolerant genotypes showed lower stomatal conductance and leaf water potential for all types of stress when compared to irrigated treatments. An increase in total soluble sugar content was observed in leafs of the two sorghum genotypes however higher in the tolerant line. Overall, the genotype 9910032 presented higher photosynthetic rate and grain yield in relation to the sensitive genotype 9615818, in the same water condition. These results indicated that sugar content is modified under water deficit conditions indicating that if might be involved in plant protection

Antimicrobial evaluation of quinones and heterocyclic compounds against mycobacterium marinum, M. kansasii and M. abscessus

The resistance to antimicrobials and biocides observed in mycobacteria which do not cause tuberculosis (MNT) determines the necessity to develop drugs. The present study evaluated the activity of naphthoquinones and heterocyclic derivatives obtained from lapachol against Mycobacterium kansasii, M. marinum, and M. abscessus, through the REMA method. It was observed that lapachol was inactive against the three mycobateria species, while β-lapachone and nor-β-lapachone showed activity only against M. marinum. The most active substances for M. kansasii were the derivates 2, 3, 7, and 11, in which compound 2 (CMI = 0.96 μM) was the most active. For M. marinum, 2, 11, and 14 were the most active, while against M. abcessus the compound 3 was the only active. The results showed a wide and diversified resistance spectrum among the species studied, which could be related to the molecular structure and position of the substituting groups, indicating the potentiality of these molecules as antimicrobial prototypes.Colegio de Farmacéuticos de la Provincia de Buenos Aire