6 research outputs found
PRODUTOS NÃO MADEIREIROS: CONCEITUAÇÃO, CLASSIFICAÇÃO, VALORAÇÃO E MERCADOS
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 paÃs.
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
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 paÃs.
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
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