Coriander: a new host of tospovirus in the Submédio of San Francisco Valley.

No pathogenic fungi and bacteria were associated with symptomatic plants

Photovoltaic solar energy in brazil and the contribution of Federal Institute of Rio Grande do Norte (IFRN)

Photovoltaic solar energy is presented as a promising source for Brazil, considering that most of the Brazilian territory is located near the equator, which implies days with the highest number of hours of sunlight. The participation of this energy source in the Brazilian energy matrix corresponds to only 0.01% of installed capacity. Important actions are being made to increase this participation: R & D programs of electric utilities, regulation of distributed microgeneration and minigeneration, energy auctions of the Federal Government and publication of technical standards by the Brazilian Association of Technical Standards (ABNT). This paper presents the initiatives for the implementation of photovoltaic solar energy in Brazil, the prospects for its consolidation as a source of energy, and the contribution of the Federal Institute of Rio Grande do Norte (IFRN) for this scenario. The analysis of the economic and financial viability of photovoltaic solar plant installed at the Rectory of IFRN and the consequent reduction of expenses with electricity are also presented.info:eu-repo/semantics/publishedVersio

Chemodiversity of dissolved organic matter in the Amazon Basin

Regions in the Amazon Basin have been associated with specific biogeochemical processes, but a detailed chemical classification of the abundant and ubiquitous dissolved organic matter (DOM), beyond specific indicator compounds and bulk measurements, has not yet been established. We sampled water from different locations in the Negro, Madeira/Jamari and Tapajós River areas to characterize the molecular DOM composition and distribution. Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS) combined with excitation emission matrix (EEM) fluorescence spectroscopy and parallel factor analysis (PARAFAC) revealed a large proportion of ubiquitous DOM but also unique area-specific molecular signatures. Unique to the DOM of the Rio Negro area was the large abundance of high molecular weight, diverse hydrogen-deficient and highly oxidized molecular ions deviating from known lignin or tannin compositions, indicating substantial oxidative processing of these ultimately plant-derived polyphenols indicative of these black waters. In contrast, unique signatures in the Madeira/Jamari area were defined by presumably labile sulfur- and nitrogen-containing molecules in this white water river system. Waters from the Tapajós main stem did not show any substantial unique molecular signatures relative to those present in the Rio Madeira and Rio Negro, which implied a lower organic molecular complexity in this clear water tributary, even after mixing with the main stem of the Amazon River. Beside ubiquitous DOM at average H ∕ C and O ∕ C elemental ratios, a distinct and significant unique DOM pool prevailed in the black, white and clear water areas that were also highly correlated with EEM-PARAFAC components and define the frameworks for primary production and other aspects of aquatic life

Digestibilidade da matéria seca do feno de alfafa e farelo de mamona desintoxicada pela técnica do "saco de nylon".

Comparação da digestibilidade de matéria seca do feno de alfafa e do farelo de mamona desintoxicada, pela técnica do saco de nylon, utilizando-se como repetições 2 bovinos fistulados adultos da raça holandesa

Prostaglandin E2-EP1 and EP2 receptor signaling promotes apical junctional complex disassembly of Caco-2 human colorectal cancer cells

<p>Abstract</p> <p>Background</p> <p>The apical junctional complex (AJC) is a dynamic structure responsible to maintain epithelial cell-cell adhesions and it plays important functions such as, polarity, mechanical integrity, and cell signaling. Alteration of this complex during pathological events leads to an impaired epithelial barrier by perturbation of the cell-cell adhesion system. Although clinical and experimental data indicate that prostaglandin E₂(PGE₂) plays a critical function in promoting cell motility and cancer progression, little is known concerning its role in AJC disassembly, an event that takes place at the beginning of colorectal tumorigenesis. Using Caco-2 cells, a cell line derived from human colorectal cancer, we investigated the effects of prostaglandin E₂(PGE₂) treatment on AJC assembly and function.</p> <p>Results</p> <p>Exposition of Caco-2 cells to PGE₂promoted differential alteration of AJC protein distribution, as evidenced by immunofluorescence and immunoblotting analysis and impairs the barrier function, as seen by a decrease in the transepithelial electric resistance and an increase in the permeability to ruthenium red marker. We demonstrated the involvement of EP1 and EP2 prostaglandin E₂receptor subtypes in the modulation of the AJC disassembly caused by prostanoid. Furthermore, pharmacological inhibition of protein kinase-C, but not PKA and p38MAPK significantly prevented the PGE₂effects on the AJC disassembly.</p> <p>Conclusion</p> <p>Our findings strongly suggest a central role of Prostaglandin E2-EP1 and EP2 receptor signaling to mediate AJC disassembly through a mechanism that involves PKC and claudin-1 as important target for the TJ-related effects in human colorectal cancer cells (Caco-2).</p

Degradabilidade ruminal da fibra em detergente neutro e do nitrogênio insolúvel em detergente neutro da silagem de milho e do farelo de soja, em bovinos da Raça Nelore.

Empregou-se a técnica da degradação in situ, utilizando-se quatro animais Nelores com peso vivo médio de 520k e 36 meses de idade

Estudos preliminares de métodos de irrigação em cebola em Oxisol.

A cebola (Allium cepa, L.) é uma das principais culturas em importância econômica, na região do Sub-Médio São Francisco, sendo cultivada em maior escala nos solos aluviais, usando-se principalmente o método de bacias inundadas

Linhagens de feijoeiro-comum carioca avaliadas para características relacionadas à qualidade comercial dos grãos.

O objetivo desse trabalho foi identificar linhagens de feijoeiro-comum de grãos tipo carioca com alta produtividade de grãos, porcentagem de grãos com tamanho comercial e massa de 100 grãos, no o Estado de Goiás e Distrito Federal.Conpeex 2012

Estudo do controle ao oídio (Erysiphe cichoracearum, de Candolle) do meloeiro (Cucumis melo, L.) no Sub-Médio São Francisco.

O melão é uma cultura que sofre o ataque de inúmeras doenças e pragas, desde a semeadura, desenvolvimento e colheita.bitstream/item/133056/1/31922-1.pd