Analytical results for a Bessel function times Legendre polynomials class integrals

When treating problems of vector diffraction in electromagnetic theory, the evaluation of the integral involving Bessel and associated Legendre functions is necessary. Here we present the analytical result for this integral that will make unnecessary numerical quadrature techniques or localized approximations. The solution is presented using the properties of the Bessel and associated Legendre functions.Comment: 4 page

Microssatélites para a caracterização de Coffea arabica.

A caracterização de genótipos é importante tanto em bancos de germoplasma quanto para o registro de cultivares. Para a maioria das espécies, esta caracterização é realizada por meio de marcadores morfológicos que podem apresentar algumas limitações para distinção de cultivares de espécies como o cafeeiro que apresenta base genética estreita. Além disso, os marcadores morfológicos podem ser influenciados pelo ambiente, apresentar baixo grau de polimorfismo ou serem dependentes do estádio de desenvolvimento da planta. Os marcadores moleculares SSR podem ser uma alternativa para a identificação de cultivares de café por apresentarem ampla cobertura do genoma e, geralmente, elevado grau de polimorfismo. Este trabalho foi realizado com o objetivo de caracterizar 12 cultivares e três clones de café arabica utilizando marcadores SSR. Trinta e quatro locos SSR desenvolvidos a partir de etiquetas de sequências expressas (EST) disponíveis no Projeto do Genoma Café, e também outros três locos já publicados (Sat 225, Sat 229 e Sat259) foram utilizados neste estudo. Os locos LEG 11, LEG 13, LEG 29, LEG 26, LEG 32, P18 e SAT 225 foram polimórficos entre os genótipos e permitiram caracterizar as cultivares Acauã, IBC-Palma 2, Sabiá Tardio e Icatu Amarelo IAC 3282. No dendrograma gerado pelos marcadores SSR observou-se que a cultivar Acauã apresentou o menor índice de similaridade genética (0,88) em relação aos demais materiais envolvidos neste estudo, não sendo possível observar distância genética entre clone 3, Catuaí Vermelho IAC 144, Catuaí Amarelo IAC 62, Catucaí Vermelho 2015 cv.476, Catucaí Amarelo 2015 cv.479, Mundo Novo IAC 376-4, Obatã e Paraíso. Pelas características de base genética estreita do cafeeiro se faz necessária a utilização de um maior número de locos SSR para a caracterização de todas as cultivares e clones deste estudo

Aging characterization of metals for exhaust systems

The mechanical characteristics of four materials used in automotive exhaust systems have been compared after an aging treatment to evaluate the combined effects of thermo-mechanical fatigue and corrosion. For this purpose, an experimental aging procedure has been developed. This procedure is composed of chemical, thermal and mechanical cycles, which are combined and repeated to simulate the actual operating conditions of automotive exhaust systems. Three austenitic steels (AISI 309, AISI 316Ti, and AISI 321) and a nickel-based alloy (Inconel 625) are tested. The results show that Inconel 625 and AISI 309 are less affected by the aging process than the other material

Avaliação da produção de cachos de frutas em palmeiras de Butiá (Butia odorata (Barb. Rodr.) Noblick & Lorenzi )

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Associação de implante metálico e implante intramedular de polímero de mamona (Ricinus comunis) na estabilização de fratura cominutiva em fêmur de guaxinim (Procyon cancrivorus)

O artigo não apresenta resumo

Agricultura de Precisão: Programas Tecnológicos no Brasil

Precision agriculture (AP) is recognized as a technological innovation tool because when applied in a preventive way during agricultural production, it improves the economic and management aspects, minimizing losses of agricultural inputs and environmental risks in relation to conventional agriculture. This article describes government incentive and free trade programs for assessing productivity, analyzing fertility deficiencies, soil and plant physical and chemical characteristics, as well as evaluating the development of pests and diseases that may occur during production

Exposure to a Brazilian pulp mill effluent impacts the testis and liver in the zebrafish

While many studies have shown that pulp mill effluents can affect ovarian physiology in fish, far fewer studies have considered the effects in males. We conducted a lab study to examine the effects of effluent from a Brazilian pulp and paper mill on hepatic and testicular morphology and various aspects of testicular physiology in the zebrafish Danio rerio. Males were exposed to lab water (control) or 4% effluent for 14 days. Effluent exposure did not affect testis size as measured by the gonadosomatic index, but contributed to morphological changes in the seminiferous tubules. The number of cysts with histopathological changes was elevated in effluent-exposed fish and the number of cysts containing spermatids was significantly reduced. The testis of effluent exposed fish had reduced levels of lactate, elevated lactate dehydrogenase activity, increased levels of reactive oxygen species and reduced levels of phosphorylated P38 mitogen-activated protein kinase (pP38 MAPK). Separate studies showed that the addition of lactate to testicular tissue incubated in vitro increased the activation of P38 MAPK. Effluent exposure also increased vacuolization, necrosis, apoptosis, hyperemia, and fat infiltration of the hepatocytes. Collectively, we provide evidence of short term effects of pulp mill effluent on testicular and hepatic physiology and biochemistry in the zebrafish