Características da madeira de seis espécies de eucalipto plantadas em Colombo - PR.

Foram analisadas as propriedades da madeira de seis espécies de Euca/yptus plantadas em Colombo, PR. As espécies estudadas foram Euca/yptus badjensis, E. panicu/ata, E. robusta, E. smithii, E. vimina/is e o híbrido cambiju. As variáveis foram densidade básica, poder calorífico, composição química, retratibilidade e o processo de secagem. Adicionalmente, os resíduos do tronco e os ramos foram quantificados e analisados como fonte de energia. Foram observadas diferenças significativas entre espécies para algumas propriedades da madeira. E. panicu/ata produziu a madeira mais densa e mais homogênea com relação à variação da densidade no sentido longitudinal. A madeira do híbrido cambiju mostrou-se dimensionalmente mais estável e, juntamente com a madeira de E. panicu/ata, foram aquelas de melhor comportamento no processo de secagem. E. panicu/ata e E. smithii produziram lenha de melhor qualidade.bitstream/item/119090/1/digitalizar0022.pd

Participação da Embrapa Solos em congressos: ano 2009.

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Características físicas, químicas e anatômicas da madeira de Pinus merkusii.

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Características da madeira de Populus sp. e Platanus sp.

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Brazil certificate - rice export value added.

The rice produced in Rio Grande do Sul (RS) has quantity (productivity + technologie) that contributes to food security, quality (organoleptide + food safety + varietal identification) that contributes to value addition and positive image and meets safety, requirements environmental (environmental licensing + rural land register) that contribute to the preservation of the Pampa Biome. All these positive aspects are the basis for an official certification of the Brazilian government whose identification label is Brazil Certificate: Quality Agriculture. The rice industry in RS also has technology to focus the concept of quality with consumers and associate positive image, enabling innovation for a market that requires traceability and certification. The challenges faced by Brazilian rice exporters include overcoming phytosanitary and environmental barriers, consolidating sales to newly conquered markets and ensuring customer loyalty. In this context, an internationally recognized certification, such as the Brazil Certified: Quality Agriculture, which has National Institute of Metrology, Quality and Technology as the certifying agency provides confidence to the markets and, consequently, transparency for consumers

First passages in bounded domains: When is the mean first passage time meaningful?

We study the first passage statistics to adsorbing boundaries of a Brownian motion in bounded two-dimensional domains of different shapes and configurations of the adsorbing and reflecting boundaries. From extensive numerical analysis we obtain the probability P(\omega) distribution of the random variable \omega=\tau_1/(\tau_1+\tau_2), which is a measure for how similar the first passage times \tau_1 and \tau_2 are of two independent realisations of a Brownian walk starting at the same location. We construct a chart for each domain, determining whether P(\omega) represents a unimodal, bell-shaped form, or a bimodal, M-shaped behaviour. While in the former case the mean first passage time (MFPT) is a valid characteristic of the first passage behaviour, in the latter case it is an insufficient measure for the process. Strikingly we find a distinct turnover between the two modes of P(\omega), characteristic for the domain shape and the respective location of absorbing and reflective boundaries. Our results demonstrate that large fluctuations of the first passage times may occur frequently in two-dimensional domains, rendering quite vague the general use of the MFPT as a robust measure of the actual behaviour even in bounded domains, in which all moments of the first passage distribution exist.Comment: 9 pages, 6 figure

Características da madeira de Liquidambar styraciflua.

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