Spontaneous R-Parity violation bounds

We investigate bounds from tree-level and one-loop processes in generic supersymmetric models with spontaneous R-parity breaking in the superpotential. We analyse the bounds from a general point of view. The bounds are applicable both for all models with spontaneous R-parity violation and for explicit bilinear R-parity violation based on general lepton-chargino and neutrino-neutralino mixings. We find constraints from semileptonic B, D and K decays, leptonic decays of the mu and tau, electric dipole moments, as well as bounds for the anomalous magnetic moment of the muon.Comment: 22 page

Captação e armazenamento de água para consumo animal durante a estação de seca na Planície Pantaneira.

Espera-se que essa publicação venha auxiliar os produtores do Pantanal com as recomendações de práticas sustentáveis para o manejo dos recursos hídricos para uso pela pecuária. Com essas práticas, objetiva-se diminuir a pressão sobre as águas superficiais da Planície Pantaneira, evitar a deterioração da qualidade da água, e dessa maneira contribuir com a conservação dos serviços ecossistêmicos e ambientais.bitstream/item/220330/1/DOC167Captacao-e-armazenamento-de-agua2020.pd

Broken R-parity, stop decays, and neutrino physics

We discuss the phenomenology of the lightest stop in models where R-parity is broken by bilinear superpotential terms. In this class of models we consider scenarios where the R-parity breaking two-body decay ~t_1->\tau^+b competes with the leading three-body decays such as ~t_1->W^+b~\chi^0_1. We demonstrate that the R-parity violating decay can be sizable and in some parts of the parameter space even the dominant one. Moreover we discuss the expectations for \~t_1->\mu^+b and ~t_1->e^+b. The recent results from solar and atmospheric neutrinos suggest that these are as important as the tau bottom mode. The \~t_1->l^+b decays are of particular interest for hadron colliders, as they may allow a full mass reconstruction of the lighter stop. Moreover these decay modes allow cross checks on the neutrino mixing angle involved in the solar neutrino puzzle complementary to those possible using neutralino decays. For the so--called small mixing angle or SMA solution ~t_1->e^+b should be negligible, while for the large mixing angle type solutions all ~t_1->l^+b decays should have comparable magnitude.Comment: 51 pages, 6 figures, LaTeX2e and RevTeX4, published versio

Global patterns of body size evolution in squamate reptiles are not driven by climate

Aim: Variation in body size across animal species underlies most ecological and evolutionary processes shaping local- and large-scale patterns of biodiversity. For well over a century, climatic factors have been regarded as primary sources of natural selection on animal body size, and hypotheses such as Bergmann's rule (the increase of body size with decreasing temperature) have dominated discussions. However, evidence for consistent climatic effects, especially among ectotherms, remains equivocal. Here, we test a range of key hypotheses on climate-driven size evolution in squamate reptiles across several spatial and phylogenetic scales. Location: Global. Time period: Extant. Major taxa studied: Squamates (lizards and snakes). Methods: We quantified the role of temperature, precipitation, seasonality and net primary productivity as drivers of body mass across ca. 95% of extant squamate species (9,733 spp.). We ran spatial autoregressive models of phylogenetically corrected median mass per equal-area grid cell. We ran models globally, across separate continents and for major squamate clades independently. We also performed species-level analyses using phylogenetic generalized least square models and linear regressions of independent contrasts of sister species. Results: Our analyses failed to identify consistent spatial patterns in body size as a function of our climatic predictors. Nearly all continent- and family-level models differed from one another, and species-level models had low explanatory power. Main conclusions: The global distribution of body mass among living squamates varies independently from the variation in multiple components of climate. Our study, the largest in spatial and taxonomic scale conducted to date, reveals that there is little support for a universal, consistent mechanism of climate-driven size evolution within squamates

Experiência participativa de sistema agroflorestal no Assentamento "Sepé Tiaraju", Ribeirão Preto, SP.

O assentamento Sepé Tiaraju foi criado com a proposta inovadora de trabalhar dentro da matriz agroecológica. Este artigo relata a implantação de uma Unidade Demonstrativa e de Observação em Sistemas Agroflorestais no assentamento, destacando a ativa participação dos agricultores em todo o processo

Avaliação da emergência e crescimento inicial de plântulas de diferentes lotes de milho.

O processo de germinação de sementes e emergência de plântulas dependem da disponibilidade de água e oxigênio, além da temperatura do substrato. Objetivou-se avaliar a emergência e o crescimento inicial de plântulas de diferentes lotes de milho. O presente experimento foi realizado em casa de vegetação, onde foram analisadas as seguintes variáveis: emergência, computando-se a porcentagem de plântulas normais, plântulas mortas, plântulas anormais, sementes duras e comprimento da parte aérea e da raiz de seis lotes de sementes de milho. Os cultivares utilizados foram: BR 5011 Sertanejo, BRS Assum Preto, BR 5028 São Francisco, BRS Gorutuba, BRS Caatingueiro e BR 5033 Asa Branca. De acordo com os resultados obtidos, verificou-se que os lotes de milho Gorutuba e Sertanejo quando irrigados com água doce, apresentaram-se superior em aos demais lotes em todas as variáveis estudadas no presente trabalho, já para os resultados encontrados quando irrigados com água salina, o lote de milho Sertanejo apresentou os melhores resultados

Diet crude protein reduction on follicular fluid and cumulus-oocyte complexes of mid-lactating Girolando cows.

This study evaluated the effect of crude protein (CP) reduction in four diets (156, 139, 132, and 127 g Kg-1 DM) maintaining constant metabolizable protein (188 g/day) on the follicular fluid and cumulus-oocyte complexes of mid-lactating Girolando cows. Twenty-two Girolando cows with average of 21.55 ±3.19 L daily milk yield, 105.30 ±22.62 days in lactation and 3.22 ±0.03 body condition score were selected. To reduce CP in diets and maintain constant metabolizable protein, urea and soybean meal were gradually replaced by lignosulfonate-treated soybean meal (SoyPass®, Cargill), resulting in an increase in rumenundegradable protein and a reduction in rumen degradable protein. A linear and quadratic reduction was observed in the plasma and follicular fluid urea nitrogen concentration following CP reduction, with the most intense reduction occurring in the 127 g Kg-1 DM group (p<0.001). As CP reduced, there was a tendency for a linear increase in the follicular growth rate (P=0.0696), on the number and proportion of viable oocytes (P<0.09), and also a linear increase for the number (P=0.0397) and proportion (P<0.09) of grade I viable oocytes. Plus, there was a linear effect for the number of cumulus oophorus cells. Cows fed with the lowest amount of CP had cumulus-oocyte complexes with higher numbers of cumulus oophorus cells (P=0.0238). Also, the reduction of diet crude protein was followed by a decrease in the probability of oocytes? DNA degradation. In conclusion, the reduction of CP in the diet of mid-lactating Girolando cows, reduces urea nitrogen concentration in both blood plasma and follicular fluid, and, as a consequence, increases the viability of oocytes and the number of cumulus oophorus cells while reducing oocytes? DNA degradation of follicular included cumulus-oocyte complex. The reduction on dietary CP may improve in vivo oocytes-embryo development impacting fertility of lactating dairy cows