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

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

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

Siting study of solar thermoelectric plants in the State of Minas Gerais.

The generation of heliothermal electricity has received increasing attention throughout the world in countries such as Spain, the USA, Germany and many others. In Brazil, this type of energy generation in the form of large projects (above 80 MW) remains unexplored. However, it is known that in the country, there are extensive areas of normal direct irradiation with high intensity and a low seasonality factor, especially in the semiarid regions in Brazil, mainly the North and Northeast of Minas Gerais. Moreover, these Minas Gerais regions have other significant characteristics for the installation of these plants: proximity to transmission lines, flatness, the fact that the respective vegetation is not endangered, a suitable land use profile (availability of land not used in agriculture), low wind speed, low population density, and, most recently, an increase in the demand for local electric energy due to the economic growth above the Brazilian average rate. Furthermore, the introduction of solar plants in that region, due to its distributed nature, will bring development and growth to the region (normally poor) by generating employment and income. This article presents a study of the optimal location of thermoelectric plants in the semiarid regions of Minas Gerais, conducted with Geographical Information System (GIS) technology. GIS consists of a set of specialised resources that allow the manipulation of spatial data, bringing efficiency and agility in the identification of suitable places for the installation of solar plants, while simultaneously enabling the consideration of future scenarios for energy planning, with its respective impact, costs and benefits. The study has identified very promising solar irradiation levels for the electric generation by solar energy, whether thermoelectric or photovoltaic, reaching an annual solar irradiation of 2700 kWh/m² in the summer and in the range of 2200 - 2400 kWh/m² on an annual basis. This area includes a vast region in the North/Northeast of the state, which also has continuous and flat regions, with slopes inferior to 3%; in addition, high-quality hydro resources are abundant and well distributed. Furthermore, the Minas Gerais region has few areas with high agriculture profile and reduced quantity of protected units. Therefore, generally speaking, the coverage of the transmission lines in that region is suitable. Considering the most relevant aspects mentioned before, and taking as a reference the micro-region limits defined by the IBGE, the following micro-regions were classified as the most promising ones: 1) Janaúba, 2) Januária, 3) Pirapora and Unaí, 4) Pirapora and Paracatu, 5) Curvelo and Três Marias, and 6) Patrocínio and Araxá. Finally, it is important to highlight that this potential might be explored gradually in the medium term, with the shortage of other supply sources, the scale up and readiness of such technologies, as well as the creation of a complex solar-wind-hydro system that leverages the strong complementarity of such resources, as has been observed

Por que o RNAi induzido por ingestão é ineficiente em Diatraea saccharalis? Um possível papel para DsacREase e outras nucleases.

Na publicação: Maria Fatima Grossi-de-sa

Avaliação de híbridos de sorgo para silagem por meio da degradabilidade in situ.

O experimento foi realizado com o objetivo de avaliar a degradabilidade in situ e a cinética de degradação da Matéria Seca (MS) e Proteína Bruta (PB) das silagens de três genótipos de sorgo. Foram utilizados duas linhagens isogênicas de sorgo granífero (CMSXS 114 e CMSXS 165) e um híbrido de sorgo (BR 700 duplo propósito). O plantio dos genótipos foi realizado no verão de 2009, em canteiros de 5 m de comprimento, 3 m de largura e espaçamento de 75 cm entrelinhas. Após o corte, o material foi ensilado. Após a abertura dos silos, as amostras foram pré-secas, moídas e acondicionadas em frascos de vidro para análises de MS e PB e a digestibilidade in situ destas frações. O delineamento experimental utilizado foi o inteiramente casualizado, com quatro repetições e quatro tratamentos, e as médias comparadas pelo teste de Tukey ao nível de 5% de significância. Quanto à taxa de degradação da MS, a silagem da linhagem CMSXS165 sem tanino foi superior a todos os tratamentos. O genótipo da linhagem isogênica sem tanino (CMSXS 165) apresentou maior degradabilidade efetiva da PB do que a linhagem com tanino (CMSXS 114). Os resultados encontrados neste experimento permitem concluir que a presença do tanino pode reduzir a degradabilidade ruminal da MS e PB

BRSMG Predileta: nova cultivar de arroz irrigado para as várzeas mineiras.

A BRSMG Predileta é originária do cruzamento entre as linhagens CNAx 4267 e CNA 6080, realizado pela Embrapa Arroz e Feijão em 1988. No período de 1989/90 a 1995/96, as populações segregantes foram conduzidas utilizando-se os métodos genealógicos e massal, selecionando-se uma linhagem que foi registrada no BAG da unidade com o código de CNA 8575

Atomic mass dependence of \Xi^- and \overline{\Xi}^+ production in central 250 GeV \pi^- nucleon interactions

We present the first measurement of the atomic mass dependence of central \Xi^- and \overline{\Xi}^+ production. It is measured using a sample of 22,459 \Xi^-'s and \overline{\Xi}^+'s produced in collisions between a 250 GeV \pi^- beam and targets of beryllium, aluminum, copper, and tungsten. The relative cross sections are fit to the two parameter function \sigma_0 A^\alpha, where A is the atomic mass. We measure \alpha = 0.924+-0.020+-0.025, for Feynman-x in the range -0.09 < x_F < 0.15.Comment: 10 pages, revtex, 2 figures, submitted to Phys. Rev.

Avaliação de cultivares de soja no cerrado de Rondônia nas safras 2006/07 e 2007/08.

Organizado por Odilon Ferreira Saraiva, César de Castro, Regina Maria Villas Bôas de Campos Leite, Fábio Alvares de Oliveira

Is organic fertilizer application a viable alternative to synthetic fertilizer for Piatã grass.

Organic fertilizer in many cases can replace mineral fertilizers and in consequence reduce production costs and improve soil quality. Thus, the aim of this work was to evaluate productive, morphogenic and structural characteristics of Piatã grass (Urochloa brizantha) fertilized with urea, organic compost and biofertilizer throughout a year. The trial design was a block split-plot in time (seasons) design with 4 treatments (fertilizing with urea, organic compost, biofertilizer and Control) and 6 repetitions. The evaluated parameters were: dry matter production (DMP), leaf elongation rate (LER), leaf appearance rate (LAR), phyllochron (PHYL), leaf lifespan (LLS), pseudostem elongation rate (SER), final leaf length (FLL), number of live leaves (NLL) and number of tillers (NT). The highest LAR values were observed during summer and spring for the treatment with urea, which also produced the highest LER values. No difference was found in SER among the fertilizer treatments but all fertilized treatments were superior to Control. NT and DMP values were highest (P<0.05) in the treatment with urea, followed by biofertilizer, organic compost and Control. In conclusion, while the use of urea provided greatest forage production, applying biofertilizer gave superior yields to organic compost. Other benefits of organic fertilizers should be assessed as well as combinations of organic and inorganic fertilizers