Influence of the external pressure on the quantum correlations of molecular magnets

The study of quantum correlations in solid state systems is a large avenue for research and their detection and manipulation are an actual challenge to overcome. In this context, we show by using first-principles calculations on the prototype material KNaCuSi$_{4}$O$_{10}$ that the degree of quantum correlations in this spin cluster system can be managed by external hydrostatic pressure. Our results open the doors for research in detection and manipulation of quantum correlations in magnetic systems with promising applications in quantum information science

Deforestation within the higher Paraguay river basin: Brazilian Pantanal wetland: until 1976.

Evaluations about deforestation, until 1976, will be presented in this article, representing the decade of the 70s. Being this, the first of a series of three evaluations, that will include the decades of the 80s and the 90s. In this context, the objective of this research is to map and quantify deforested areas in the Higher Paraguay river Basin (HPB), providing the resuls per State (MT and MS), Pantanal, plateau, sub-regions and counties.SBSR 2001

Chemical composition of the essential oil of leaves of Croton conduplicatus Kunth.

Objectives to elucidate the chemical composition of the essential oil from leaves of C. conduplicatus collected in dry and rainy season. Methods: Fresh leaves of Croton conduplicatus Kunth. were collected in Petrolina-PE

Chemical composition of the essential oil of leaves of Croton conduplicatus Kunth subjected to different extraction times.

Objectives to evaluate the influence of different extraction times on the chemical composition of the essential oil from the leaves of Croton conduplicatus

Efeito da solarização na população infestante de tiririca (Cyperus rotundus) e na produção de hortaliças.

bitstream/CNPAB-2010/27143/1/cot018.pd

Análise da adequação à legislação ambiental das APPs fluviais na bacia do rio Salobra, MS.

A forma inadequada do uso e ocupação do solo tem causado impactos nos ecossistemas fluviais e aquáticos do Brasil, sobretudo por conta da degradação das matas ciliares. A legislação ambiental determina a obrigatoriedade de Áreas de Preservação Permanente (APPs) ao longo de rios e nascentes, o que nem sempre é respeitado. Diante disso, foi conduzido um estudo na bacia do rio Salobra, afluente do rio Miranda, localizado na região sudoeste do Estado de Mato Grosso do Sul, com o objetivo de verificar a adequação das áreas de APPs fluviais em relação à legislação ambiental. A partir do uso de um Sistema de Informações Geográficas e imagens de satélite, foram criadas faixas ou buffers, indicando a faixa obrigatória de existência de matas ciliares, segundo a legislação ambiental vigente. A largura da faixa obrigatória foi determinada de acordo com a largura dos rios, estimada a partir de imagens HRC/CBERS-2B, com resolução espacial de 2,5 metros. Em seguida, foram realizados os cruzamentos entre as áreas obrigatórias e o mapeamento das formações vegetais da bacia, obtendo-se assim a delimitação das áreas em acordo ou desacordo em relação a legislação ambiental. Os resultados indicaram que 992 ha, ou 14% do total de áreas que deveriam estar cobertas por matas ciliares, estão em desacordo com a legislação ambiental. A metodologia proposta mostrou potencial como ferramenta auxiliar nas atividades de fiscalização e licenciamento ambiental.Geopantanal 2010

SPACE SIMULATION OF THE CHINA-BRAZIL EARTH RESOURCES SATELLITE CBERS

Space Simulation Tests are performed in spacecraft in order to verify equipment proper operation under thermal vacuum conditioning and to verify the correct workmanship in the assembling of the flight spacecraft as a whole. This paper presents the space simulation (thermal vacuum test) developed in the China Brazil Earth Resources Satellite, Flight Model no. 2, that took place at the Integration and Tests Laboratory LIT, INPE. Measuring approximately 1.8 x 2.0 x 2.2m, weighting 1,500 kg and carrying three cameras as the main payload, this spacecraft is scheduled to be launched in China. The spacecraft was installed in the 3x3m space simulation chamber and the tests run 24 hours a day completing a total of 350 hours. Using the technique of skin-heaters complemented by the thermal vacuum chamber thermally conditioned shrouds and cold plates, dedicated heat inputs and heat sink where applied at the spacecraft surfaces in order to obtain the required high and low acceptance values of temperature and, subsequently, simulating the operational conditions for the necessary electronic subsystems functioning tests of the spacecraft. This test campaign included teams from both China and Brazil, summing a total of 67 people directly involved