Aproveitamento de várzeas.

Distribuição das várzeas. Natureza dos problemas em várzeas. Caracterização dos principais solos de várzeas. Recuperação de várzeas. Modificações ambientais. Conclusões. Necessidade de pesquisas futuras

Manejo de várzeas.

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The physical properties of Gd3Ru: a real candidate for a practical cryogenic refrigerator

FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORThe magnetization, the specific heat, and the magnetocaloric effect (MCE) for Gd3Ru are presented as function of temperature at different magnetic fields. The results show a maximum entropy change -Delta S = 30 J/kg K @ 5 T, which is the highest value for the R3M compounds. With a non-hysteretic transition of first order type at T-C = 54 K, it presents a temperature change Delta T-max = 5.7K around 59K with a refrigerating cooling power of 700 J/kg and these results are comparable to values found for giant MCE materials. This compound is stable and able to operate at temperatures between 90K and 40K with a minimum -Delta S = 5 J/kg K. These figures were obtained by sweeping the magnetic field without using sample preparation routines. This methodology is appropriate to evaluate the MCE for the cycling process of a cryogenic magnetic refrigerator. (C) 2015 AIP Publishing LLC.The magnetization, the specific heat, and the magnetocaloric effect (MCE) for Gd3Ru are presented as function of temperature at different magnetic fields. The results show a maximum entropy change -Delta S = 30 J/kg K @ 5 T, which is the highest value for the R3M compounds. With a non-hysteretic transition of first order type at T-C = 54 K, it presents a temperature change Delta T-max = 5.7K around 59K with a refrigerating cooling power of 700 J/kg and these results are comparable to values found for giant MCE materials. This compound is stable and able to operate at temperatures between 90K and 40K with a minimum -Delta S = 5 J/kg K. These figures were obtained by sweeping the magnetic field without using sample preparation routines. This methodology is appropriate to evaluate the MCE for the cycling process of a cryogenic magnetic refrigerator.1061914FAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORFAPESP - FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULOCNPQ - CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICOCAPES - COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIORSem informaçãoSem informaçãoSem informaçãoThe authors thank Professor Lisandro Cardoso and Hugo Freitas for the X-Ray diffractograms and also Gustavo Lombardi for the assistance in the sample preparation. We acknowledge the financial support provided by the Brazilian agencies FAPESP, FAEPEX-Unicamp, CNPq, and CAPES

Geoconservation as an emerging geoscience

The main purpose of geoconservation is theconservation of geosites as basic units of the geological heritage through the implementation of specific inventory,evaluation, conservation, valuation and monitoring proce-dures. In this paper, geoconservation is characterised as anemergent geoscience within the Earth and Space Sciences where its scope and methods, as well as production andvalidation of knowledge can be recognised–thus definingBasic Geoconservation–, interrelations with other earth sciences can be established–thus supporting Applied Geo-conservation–, and Technical Applications of Geoconser-vation can be identified through the production of materials,methods and/or scientific services useful to society, namely geoeducation. Promoting scientific education relevant to sustainable development requires new educational approaches involving the Earth Sciences, namely through geoconservation, in order to provide citizens with tools toface environmental problems, such as those arising from the depletion of geological resources—which seriously threaten the geological heritage of the Earth—and the information,skills and will make forward-looking choices, like support-ing the legal protection of Natural Monuments and/or the implementation of geotourism (including geoparks).This work has been supported by the projects CGL2008-01273/BTE-MICIIN ("Registro Geologico de Ciclos Paleoambientales del Jurasico Medio en la Cordillera Iberica") and PTDC/CTE-GEX/64966/2006 ("Identification, characterisation and conservation of geological heritage: a geoconservation strategy for Portugal"). The authors are deeply grateful to the reviewers, namely to W. A. P. Wimbledon, for their helpful comments on the manuscript

Recomendação de inoculante para cultura de milho utilizando a bactéria Herbaspirillum seropedicae, estirpe BR11417

bitstream/item/42756/1/COT119-09.pd

Pinhão manso.

Caracterização do pinhão manso.bitstream/item/133323/1/ID-35735.pd

Sistemas de rotação de culturas com trigo para a região sul do Brasil.

bitstream/item/84156/1/CNPT-COM.-TEC.-2-97.pd