Programa nacional de melhoramento do Gir Leiteiro: resultado do teste de progênie - 13º grupo.

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Aharonov-Bohm interference in quantum ring exciton: effects of built-in electric fields

We report a comprehensive discussion of quantum interference effects due to the finite structure of excitons in quantum rings and their first experimental corroboration observed in the optical recombinations. Anomalous features that appear in the experiments are analyzed according to theoretical models that describe the modulation of the interference pattern by temperature and built-in electric fields.Comment: 6 pages, 7 figure

Programa Nacional de Melhoramento do Gir Leiteiro: resultado do Teste de Progênie - 12º Grupo.

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Ameaças e oportunidades ao cultivo do feijoeiro comum no Nordeste.

Historicamente, o feijoeiro comum (Phaseolus vulgaris L.) se destaca com uma das principais culturas agrícolas no Brasil e no mundo. No Brasil, o destaque não se resume apenas aos aspectos econômicos e produtivos, mas, fundamentalmente, na segurança alimentar por fazer parte cotidiana da ?mesa? das famílias, sobretudo aquelas mais carentes, que têm neste grão a base proteica de sua alimentação. O consumo per capita de feijão comum no Brasil vem se reduzindo ao longo dos anos, com uma estimativa atual de 17 kg/habitante/ano.bitstream/item/123095/1/10-Ameacas-e-oportunidades.pd

The Use of Experimental Structures to Model Protein Dynamics

The number of solved protein structures submitted in the Protein Data Bank (PDB) has increased dramatically in recent years. For some specific proteins, this number is very high—for example, there are over 550 solved structures for HIV-1 protease, one protein that is essential for the life cycle of human immunodeficiency virus (HIV) which causes acquired immunodeficiency syndrome (AIDS) in humans. The large number of structures for the same protein and its variants include a sample of different conformational states of the protein. A rich set of structures solved experimentally for the same protein has information buried within the dataset that can explain the functional dynamics and structural mechanism of the protein. To extract the dynamics information and functional mechanism from the experimental structures, this chapter focuses on two methods—Principal Component Analysis (PCA) and Elastic Network Models (ENM). PCA is a widely used statistical dimensionality reduction technique to classify and visualize high-dimensional data. On the other hand, ENMs are well-established simple biophysical method for modeling the functionally important global motions of proteins. This chapter covers the basics of these two. Moreover, an improved ENM version that utilizes the variations found within a given set of structures for a protein is described. As a practical example, we have extracted the functional dynamics and mechanism of HIV-1 protease dimeric structure by using a set of 329 PDB structures of this protein. We have described, step by step, how to select a set of protein structures, how to extract the needed information from the PDB files for PCA, how to extract the dynamics information using PCA, how to calculate ENM modes, how to measure the congruency between the dynamics computed from the principal components (PCs) and the ENM modes, and how to compute entropies using the PCs. We provide the computer programs or references to software tools to accomplish each step and show how to use these programs and tools. We also include computer programs to generate movies based on PCs and ENM modes and describe how to visualize them

Programa nacional de melhoramento do Gir Leiteiro: resultado do teste do progenie - 11 grupo.

Programa Nacional de Melhoramento do Gir leiteiro - Resultado do teste de progênie -11.Q Grupo ; Aspectos das avaliações genéticas para produção, conformação e manejo; Avaliação das características de conformação e manejo; Dados e metodologia de análise; Como interpretar os resultados; PTAs para produção de leite e gordura; Classificação do 112 grupo; Classificação geral; STAs para conformação e manejo; Touros em teste, com resultados a serem liberados a partir de 2004.bitstream/item/82858/1/Programa-nacional-de-melhoramento89.pd

Embrapa avalia a resistência de cultivares de mandioca ao ácaro-verde em Sergipe.

O cultivo da mandioca brava (mandioca) ou mansa (macaxeira ou aipim) é uma importante fonte de renda e está relacionado à segurança alimentar de agricultores familiares do estado de Sergipe. A área plantada com mandioca (mansa e brava) no Brasil segundo o IBGE é de 1.796.966 ha com uma produtividade aproximada de 14 toneladas por hectare.bitstream/item/123086/1/Embrapa-avalia.pd

Anisotropic Confinement, Electronic Coupling and Strain Induced Effects Detected by Valence-Band Anisotropy in Self-Assembled Quantum Dots

A method to determine the effects of the geometry and lateral ordering on the electronic properties of an array of one-dimensional self-assembled quantum dots is discussed. A model that takes into account the valence-band anisotropic effective masses and strain effects must be used to describe the behavior of the photoluminescence emission, proposed as a clean tool for the characterization of dot anisotropy and/or inter-dot coupling. Under special growth conditions, such as substrate temperature and Arsenic background, 1D chains of In0.4Ga0.6 As quantum dots were grown by molecular beam epitaxy. Grazing-incidence X-ray diffraction measurements directly evidence the strong strain anisotropy due to the formation of quantum dot chains, probed by polarization-resolved low-temperature photoluminescence. The results are in fair good agreement with the proposed model

Seleções de limeira ácida Tahiti visando à diversificação de pomares do polo citrícola dos Tabuleiros Costeiros da Bahia e de Sergipe.

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Performance of the pineapple sweet orange on different rootstocks.

This study aimed at evaluating the agronomical performance of ?Pineapple? sweet orange grafted on ten rootstocks, in 2011-2017 harvests, so as to recommend the best combinations to be commercially explored in citrus growing regions in Bahia and Sergipe states, Brazil. An experiment was installed to test ten rootstock for 'pineapple' sweet orange: 'Santa Cruz' Rangpur lime, 'Red Rough' Lemon, 'Orlando' Tangelo, 'Sunki Tropical' Mandarin, 'Swingle' citrumelo, the citrandarins 'Indio' and 'Riverside' and the hybrids HTR-051, LVKxLCR-010 and TSKxCTTR-002. The trial was installed in 2008 in the municipality of Umbauba in Sergipe. The experimental design was complete randomized blocks with four replications and two plants per plot. Plant spacing was 6 x 4 m which corresponds to 416 plants per hectare and the orchard was rainfed and followed conventional management. The following agronomical parameters were evaluated: vegetative growth, drought tolerance, yield and physico-chemical quality of fruits as well as the abundance of phytophagous mites. Both hybrids LVK x LCR ' 010 and TSKC x CTTR-002 and the 'Santa Cruz' rangpur lime bestowed higher tolerance to the dry period on the 'Pineapple' orange tree, by comparison with higher water deficit susceptibility conferred by the ?Orlando? tangelo and the ?Swingle? citrumelo. Rootstocks HTR-051, ?Riverside? citrandarin, 'Swingle' citrumelo and TSKC x CTTR-02 induced plants to remain small and, thus, showed aptitude for culture densification. Cumulative yield of the ?Pineapple? orange was higher on rootstocks 'Red Rough' lemon and 'Santa Cruz' Rangpur lime, the hybrid LVK x LCR-010 and 'Sunki Tropical'. Yield efficiency was not influenced by the rootstocks. Physico-chemical quality of fruits of 'Pineapple' orange is affected by the rootstocks and meets the requirements of juice industries. Regarding plant resistance, the rootstocks did not influence the population density of mites P. oleivora, E. banksi and T. mexicanus on 'Pineapple' oranges. Results show that both rootstocks 'Red Rough' lemon and 'Santa Cruz' rangpur lime conferred high regularity to 'Pineapple' orange trees in citrus growing regions in Bahia and Sergipe states