Forest Regulation
Mostrando 13-24 de 32 artigos, teses e dissertações.
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13. O Projeto de Preservação da Mata Atlântica e consequências econômico-sociais de sua implantação na população de Picinguaba
This study aims to investigate whether the implementation of the Environmental Preservation Project - PPMA has improved the living conditions of the population of Picinguaba. Tends as central objective to structure the Parque Estadual da Serra do Mar - PESM to assist the objectives of Environmental Preservation of the Atlantic Forest, PPMA, for the area of P
Publicado em: 2009
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14. The use of the operational research in forest regulation in thinned eucalypt stands / Regulação da produção de floresta de eucalipto submetida a desbaste e destinada a multiprodutos
O objetivo deste estudo foi desenvolver uma metodologia para definir o regime ótimo de desbastes e a produção de multiprodutos de madeira de clones de eucalipto, visando o aproveitamento de diferentes sortimentos e posterior definição de uma estratégia de regulação. Foram utilizados dados de parcelas permanentes de aproximadamente 2.600 m em povoamen
Publicado em: 2008
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15. Species and weather influence on Chrysomelidae populations / Levantamento das espécies e influência de variáveis climáticas sobre populações de Chrysomelidae
Chrysomelidae is one of the most important families in the Coleoptera order. Currently, it is estimated that from 35,000 to 50,000 chrysomelid species are known. They are known as leaf beetles which may be important forest regulation factors. The aim of this research was to identify Chrysomelidae taxa at the Estação de Pesquisa, Treinamento e Educação Am
Publicado em: 2008
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16. Regulação de florestas eqüiâneas incluindo restrições de adjacência / Regulation of even aged forest, including adjacency restrictions
In a forest planning system, the traditional objectives used for the handling of sustainable productions are replaced by objectives of sustainable handling of the ecosystem. Such replacement indicates that adjacent (close) stands should not be selected to be cut down in the same period. A linear-whole programming model is proposed in order to optimize the tr
Publicado em: 2007
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17. Fuzzy set in the evaluation of the conservation state of the land use systems in the Occidental Amazonia, using beetles (Scarabaeidae) as bioindicators. / Conjuntos Fuzzy na avaliaÃÃo do estado de conservaÃÃo de sistemas de uso da terra na AmazÃnia Ocidental, usando besouros (Scarabaeidae) como bioindicadores
Currently the land is losing species much more quickly than it was some decades ago, and the human being is the main causer of this extinguishing. Biodiversity is in the basis of all survival human being, therefore it is indispensable to keep the evolution processes of the alive world acting in the regulation of the great physico-chemical equilibrium of the
Publicado em: 2007
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18. Avaliação dos instrumentos de políticas públicas na conservação integrada de florestas e águas, com estudo de caso na bacia do Corumbataí - SP / Evaluation of public policies issues for a comprehensive conservation of water and forest, with a case study at Corumbatai river basin (São Paulo, Brazil)
Forest and water keep a strong relationship in several hydrological functions. Catchments with forests have lower flow peaks, have better water quality and the forests also contribute for nutrients cycling and river protection. In addiction water provides forest vitality and contributes for its biodiversity and several environmental tasks. Water and forests
Publicado em: 2006
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19. Anotação e caracterização preliminar de genes de celulose sintase em diferentes espécies de Eucalyptus / Annotation and preliminary characterization of cellulose synthase genes in different species of Eucalyptus
Cellulose is the worlds most abundant polymer, being the main constituent of plant biomass. Genes from CesA family, that encodes the cellulose synthase enzyme, was identified in several plant species, especially in Arabidopsis thaliana, in which three of them (AtCesA4, AtCesA7 e AtCesA8) were associated with secondary cell wall cellulose production. Eucalypt
Publicado em: 2006
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20. Influência do valor da madeira de mercado sobre o ordenamento de florestas plantadas para o suprimento parcial de uma indústria de celulose e papel: uma aplicação da programação linear. / Influence of the market wood value on the management of planted forests partially supplying a pulp mill: an application of linear programming.
Generally, the Brazilian pulp industry wood supply is largely provided by planted forests owned by the companies and wood purchased in the market. Long term planning programs usually address the two supplying sources fee forests and market wood -separately. The main objective of this study is to assess the impact of different wood acquisition value scenar
Publicado em: 2002
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21. Mitochondrial calcium uptake during infection of chicken embryo cells with Semliki Forest virus.
The key role of the mitochondria in the regulation of cellular Ca2+ led to a study of mitochondrial Ca2+ uptake during the infection of chicken embryo cells with Semliki Forest virus. Mitochondrial Ca2+ uptake was stimulated during the first 5 h of infection but declined later in infection. The early stimulation suggests an increase of cytoplasmic ionized Ca
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22. Variable Chlorophyll a Fluorescence and CO2 Uptake in Water-Stressed White Spruce Seedlings 1
Regulation of photosynthetic activity can contribute to the prevention of photodamage in stress resistant plants during exposure to drought or low temperatures. Responses to increasing levels of water stress were examined in seedlings of the stress resistant forest conifer, white spruce (Picea glauca [Moench.] Voss). Some seedlings were grown under aseptic i
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23. Functional defects of RNA-negative temperature-sensitive mutants of Sindbis and Semliki Forest viruses.
Defects in RNA and protein synthesis of seven Sindbis virus and seven Semliki Forest virus RNA-negative, temperature-sensitive mutants were studied after shift to the restrictive temperature (39 degrees C) in the middle of the growth cycle. Only one of the mutants, Ts-6 of Sindbis virus, a representative of complementation group F, was clearly unable to cont
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24. From patterns to processes: Phase and density dependencies in the Canadian lynx cycle
Across the boreal forest of North America, lynx populations undergo 10-year cycles. Analysis of 21 time series from 1821 to the present demonstrates that these fluctuations are generated by nonlinear processes with regulatory delays. Trophic interactions between lynx and hares cause delayed density-dependent regulation of lynx population growth. The nonlinea
The National Academy of Sciences.