Research Notes: Resistance of soybean lines and cultivars to the root-knot nematode, Meloidogyne javanica

In a clayed soil heavy infested with Meloidogyne javanica at Guatapara farm , state of Sao Paulo , 36 soybean cultivars and breeding lines were tested for resistance to this nematode. Plots were constituted of three rows, 3 m long and 0.60 m apart and each plot was bordered on both sides with a row of \u27Davis \u27 cv, the susceptible check. Soybeans were seeded in November, 1979, in a randomized complete block design with eight replications

Supercurrent tunneling between conventional and unconventional superconductors: A Ginzburg-Landau approach

We investigate the Josephson tunneling between a conventional and an unconventional superconductor via a Ginzburg-Landau theory. This approach allows us to write down the general form of the Josephson coupling between the two superconductors, and to see which terms are forbidden or allowed by spatial symmetries. The time-reversal symmetry is also considered. We discuss the current-phase relationships, magnetic, and ac effects if we just include this direct coupling to the unconventional superconductor. In addition we consider the Josephson coupling between two short-coherence-length superconductors, extending the work of Deutscher and Müller (DM) to a finite-current calculation. We find that the critical current is suppressed below the DM value due to the fact that the coupling between the two superconductors across the junction depends on the phase difference and hence the current itself. Finally we investigate the possibility of the proximity effect, in particular the possibility that the conventional-type pairing is induced and hence coexists with the unconventional pairing near the junction. This would give the dominant contribution to the tunneling current if the direct tunneling to the unconventional pairs are suppressed for some reason. We point out that there is no possibility of dissipationless tunneling above the transition temperature of the unconventional superconductor. Even in the case in which the unconventional superconductor is below its transition temperature, we find that, for the possibility of a dissipationless current, it is crucial to have a coupling between the induced s wave and the unconventional superconductor that depends on their phase difference, which allows the conversion of the supercurrent from one type to the other. The behavior of this current, in particular as a function of temperature, is discussed. We also discuss the magnetic and time-dependent effects of the junction in the presence of this proximity effect. We see that, while some of these remain unaffected, some, in particular the time-dependent processes, are affected in a rather nontrivial manner

Model for chaotic dynamics of the perpendicular-pumping spin-wave instability

We propose a model for the dynamics of spin-wave instabilities driven by a rf field perpendicular to the dc magnetic field in the second- order Suhl process. We show that a self-oscillation arises from the dynamic nonlinear interaction between the k=0 mode driven by the pumping field and a degenerate k≠0 magnon, with frequency that depends on the dissipation rates and the nonlinear interaction parameters and not on the sample dimensions. For certain parameter values, as the driving field increases we find a period-doubling route to chaos and odd-period bifurcation windows consistent with recent experiments in yttrium iron garnet

Comparação entre extratores químicos de fósforo disponível.

Foram comparados três extratos quimicos de fósforo dispon¡vel em um Latossolo Vermelho-Escuro submetido a quatro tratamentos de adubação fosfatada (0, 150 e 450 mg de P/dm3 de solo). Os extratores qu¡micos testados foram: Mehlich 1, Mehlich 3 e resina trocadora de ânions. Entre esses, sobressaiu-se a resina, com maiores coeficientes de correlação entre a matéria seca da parte aérea de plantas de milho e o fósforo acumulado no tecido vegetal e com o fósforo extra¡do do solo. A resina também recuperou maior quantidade de fósforo do solo, além de ter apresentado correlação significativa com os outros extratores.bitstream/item/35785/1/Bol18.pd

Human cachexia induces changes in mitochondria, autophagy and apoptosis in the skeletal muscle

Cachexia is a wasting syndrome characterized by the continuous loss of skeletal muscle mass due to imbalance between protein synthesis and degradation, which is related with poor prognosis and compromised quality of life. Dysfunctional mitochondria are associated with lower muscle strength and muscle atrophy in cancer patients, yet poorly described in human cachexia. We herein investigated mitochondrial morphology, autophagy and apoptosis in the skeletal muscle of patients with gastrointestinal cancer-associated cachexia (CC), as compared with a weight-stable cancer group (WSC). CC showed prominent weight loss and increased circulating levels of serum C-reactive protein, lower body mass index and decreased circulating hemoglobin, when compared to WSC. Electron microscopy analysis revealed an increase in intermyofibrillar mitochondrial area in CC, as compared to WSC. Relative gene expression of Fission 1, a protein related to mitochondrial fission, was increased in CC, as compared to WSC. LC3 II, autophagy-related (ATG) 5 and 7 essential proteins for autophagosome formation, presented higher content in the cachectic group. Protein levels of phosphorylated p53 (Ser46), activated caspase 8 (Asp384) and 9 (Asp315) were also increased in the skeletal muscle of CC. Overall, our results demonstrate that human cancer-associated cachexia leads to exacerbated muscle-stress response that may culminate in muscle loss, which is in part due to disruption of mitochondrial morphology, dysfunctional autophagy and increased apoptosis. To the best of our knowledge, this is the first report showing quantitative morphological alterations in skeletal muscle mitochondria in cachectic patients

Demandas do agronegócio maranhense.

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Mecanismos bioquímicos, fisiológicos e moleculares relacionados com a eficiência de uso de nitrogênio em leguminosas e gramíneas.

Absorção do nitrogênio pelas plantas; Assimilação do nitrogênio pelas plantas; Ação das enzimas na eficiência de uso do nitrogênio; Identificação de genes relacionados à eficiência de uso do nitrogênio; Genes envolvidos na absorção do nitrato; Genes envolvidos na absorção do amônio; Estudos genéticos da eficiência de uso do nitrogênio; Variação da eficiência de uso de nitrogênio em gramíneas e leguminosas.bitstream/CPAMN-2010/24172/1/doc195.pd

Effect of CATA questions presentation order on sensory characterization of fruit smoothie by children and adolescents.

Sensory product characterization by consumer using check-all-that-apply (CATA) questions is increasing. However, there are still some methodological issues to sort out, and the order of presentation of the terms seems to be one of them, when the study is carried out by children and adolescents. This study aimed at investigating the influence of CATA questions presentation order on the sensory characterization of fruit smoothie by this public. The 20 terms, which were identified in previous studies with children and adolescents, were presented to participants in the fixed alphabetical and balanced orders.SLACA, 12. De 4 a 7 de Novembro de 2017. Ref. 71751

Asymptotic localization of symbol correspondences for spin systems and sequential quantizations of S2S^2

Quantum or classical mechanical systems symmetric under $SU(2)$ are called spin systems. A $SU(2)$-equivariant map from $(n+1)$-square matrices to functions on the $2$-sphere, satisfying some basic properties, is called a spin-$j$ symbol correspondence ($n=2j\in\mathbb N$). Given a spin-$j$ symbol correspondence, the matrix algebra induces a twisted $j$-algebra of symbols. In this paper, we establish a new, more intuitive criterion for when the Poisson algebra of smooth functions on the $2$-sphere emerges asymptotically ($n\to\infty$) from the sequence of twisted $j$-algebras. This more geometric criterion, which in many cases is equivalent to the numerical criterion obtained in [Rios&Straume], is given in terms of a classical (asymptotic) localization of symbols of all projectors (quantum pure states) in a certain family. For some important kinds of symbol correspondence sequences, such a classical localization condition is equivalent to asymptotic emergence of the Poisson algebra. But in general, this classical localization condition is stronger than Poisson emergence. We thus also consider some weaker notions of asymptotic localization of projector-symbols. Finally, we obtain some relations between asymptotic localization of a symbol correspondence sequence and its sequential quantizations of the classical spin system, after carefully developing a theory of sequential quantizations of smooth functions on $S^2$ and their asymptotic actions on a ground Hilbert space.Comment: slight edition of expanded version, 56 page

Agricultura apoiada pela comunidade: poderia a experiência dos agricultores americanos ser útil para os agricultores urbanos brasileiros?

O objetivo deste trabalho foi obter algumas informações sobre o projeto Agricultura Apoiada pela Comunidade (AAC) nos EUA e avaliar se consumidores e produtores urbanos pobres de uma cidade brasileira de baixa renda aceitariam se engaja neste tipo de projeto