6 research outputs found

    PRODUTOS NÃO MADEIREIROS: CONCEITUAÇÃO, CLASSIFICAÇÃO, VALORAÇÃO E MERCADOS

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    Este artigo apresenta uma revisão bibliográfica sobre produtos não madeireiros visando traçar um panorama sobre os seus principais conceitos, classificação, valoração e mercados. Constata-se a necessidade de análises mais aprofundadas sobre a importância sócio-econômica desse grupo de produtos, criando assim, uma nova linha de pesquisa florestal. Estas analises são fundamentais no caso brasileiro devido a diversidade e extensão do ecossistemas florestais existentes no país. NON-WOOD PRODUCTS: CONCEPTS, CLASSIFICATION, ECONOMIC VALUATION AND MARKETS Abstract This article presents a bibliography review on non wood forest products seeking to have a view about the main concepts, classification, economic valuation and markets. It’s necessary to do a deeper analysis about the socio-economic importance of this group of products in order to create a new forest research area. These analysis are important in Brazil because of the forest ecosystem diversity and extension

    PRODUTOS NÃO MADEIREIROS: CONCEITUAÇÃO, CLASSIFICAÇÃO, VALORAÇÃO E MERCADOS

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    Este artigo apresenta uma revisão bibliográfica sobre produtos não madeireiros visando traçar um panorama sobre os seus principais conceitos, classificação, valoração e mercados. Constata-se a necessidade de análises mais aprofundadas sobre a importância sócio-econômica desse grupo de produtos, criando assim, uma nova linha de pesquisa florestal. Estas analises são fundamentais no caso brasileiro devido a diversidade e extensão do ecossistemas florestais existentes no país. NON-WOOD PRODUCTS: CONCEPTS, CLASSIFICATION, ECONOMIC VALUATION AND MARKETS Abstract This article presents a bibliography review on non wood forest products seeking to have a view about the main concepts, classification, economic valuation and markets. It’s necessary to do a deeper analysis about the socio-economic importance of this group of products in order to create a new forest research area. These analysis are important in Brazil because of the forest ecosystem diversity and extension

    Uso do solo e cobertura vegetal do estado do Paraná, em 1980

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    The application of recently developed diffraction theory for cw transverse photothermal deflection spectroscopy (normal deflection only) to the measurements of thermophysical and mass-diffusion properties of gases is presented. Compared with the traditional ray-optics theory, the diffraction theory has one more term in the phase signal. This term quantitatively exhibits the probe-beam size effect on the phase signal. Experimental results demonstrated that even if the ratio of the probe-beam radius to the thermal diffusion length of a deflecting medium was as low as about 0.22, the probe-beam size effect could not be ignored when measuring the distance between the probe beam and a solid sample using the phase signal. With the measured distance, the thermal diffusivity αg and the temperature coefficient of the refractive index dn/dT of pure gases (O2, N2, and CO2) and binary gas mixtures (CO2-O2 and CO2-O2) were precisely measured, resulting in good agreement with literature values. Furthermore the measured dn/dT values of the pure gases had one more significant figure than the literature ones. The concentration dependences of αg and dn/dT were employed for the determination of mass-diffusion coefficients of CO2-O2 and CO2-N2, and the results were consistent with literature values
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