Offspring in response to parental female densities in the fruit fly parasitoid Diachasmimorpha longicaudata (Hymenoptera: Braconidae: Opiinae).

El presente trabajo forma parte de um programa de evaluación del parasitoide bracónido Diachasmimorpha longicaudata (Ashmead) como agente de biocontrol de Ceratitis capitata (Wiedemann) en Brasil

Dispersão e sobrevivência de machos estéreis de Moscamed, linhagem mutante TSL, no Submédio do Vale do São Francisco.

O estudo de dispersão se faz necessário para se determinar a distância entre pontos de liberação e o estudo da sobrevivência para determinar o intervalo entre liberações dos insetos no campo

Quark-Gluon String Model Description of Baryon Production in K^{\pm}N Interactions

The process of baryon production in K p collisions at high energies is considered in the framework of the Quark-Gluon String Model. The contribution of the string-junction mechanism to the strange baryon production is analysed. The results of numerical calculations are in reasonable agreement with the data on inclusive spectra of p, Lambda, bar{Lambda}, and on the bar{Lambda}/Lambda asymmetry. The predictions for Xi and Omega baryons are presented.Comment: 19 pages, 7 figure

Confinement in the Deconfined Phase: A numerical study with a cluster algorithm

We have previously found analytically a very unusual and unexpected form of confinement in SU(3) Yang-Mills theory. This confinement occurs in the deconfined phase of the theory. The free energy of a single static test quark diverges, even though it is contained in deconfined bulk phase and there is no QCD string present. This phenomenon occurs in cylindrical volumes with a certain choice of spatial boundary conditions. We examine numerically an effective model for the Yang-Mills theory and, using a cluster algorithm, we observe this unusual confinement. We also find a new way to determine the interface tension of domain walls separating distinct bulk phases.Comment: LaTex, 14 pages, 4 figure

Extrapolation of Multiplicity distribution in p+p(\bar(p)) collisions to LHC energies

The multiplicity (N_ch) and pseudorapidity distribution (dN_ch/d\eta) of primary charged particles in p+p collisions at Large Hadron Collider (LHC) energies of \sqrt(s) = 10 and 14 TeV are obtained from extrapolation of existing measurements at lower \sqrt(s). These distributions are then compared to calculations from PYTHIA and PHOJET models. The existing \sqrt(s) measurements are unable to distinguish between a logarithmic and power law dependence of the average charged particle multiplicity () on \sqrt(s), and their extrapolation to energies accessible at LHC give very different values. Assuming a reasonably good description of inclusive charged particle multiplicity distributions by Negative Binomial Distributions (NBD) at lower \sqrt(s) to hold for LHC energies, we observe that the logarithmic \sqrt(s) dependence of are favored by the models at midrapidity. The dN_ch/d\eta versus \eta for the existing measurements are found to be reasonably well described by a function with three parameters which accounts for the basic features of the distribution, height at midrapidity, central rapidity plateau and the higher rapidity fall-off. Extrapolation of these parameters as a function of \sqrt(s) is used to predict the pseudorapidity distributions of charged particles at LHC energies. dN_ch/d\eta calculations from PYTHIA and PHOJET models are found to be lower compared to those obtained from the extrapolated dN_ch/d\eta versus \eta distributions for a broad \eta range.Comment: 11 pages and 13 figures. Substantially revised and accepted for publication in Journal of Physics

Characterization of Paspalum genotypes for turfgrass cultivars development.

The characterization of genetic resources is essential to carry out a breeding program. This study aimed to characterize Paspalum genotypes with potential use as soil surface covering to support breeding programs on the development of turf cultivars. Forty-three Paspalum genotypes, comprising 11 species, were evaluated. The embryo-sacs structure was determined by cleared ovaries analysis and eight accessions were classified as sexual, 15 as apomictic, and 20 presenting facultative apomixis. Most of the genotypes have 40 chromosomes, with the exception of one accession of Paspalum vaginatum, two of Paspalum indecorum, one of Paspalum modestum, and two of Paspalum notatum that have 20 and one accession of Paspalum jesuiticum and one of Paspalum mandiocanum that have 60 chromosomes. DNA content was determined by flow cytometry, ranging from 1.35 to 4.00 pg of DNA, with most of the accessions corresponding to tetraploidy, but also diploidy and hexaploidy were found, corroborating chromosome counts. High genetic variability was found among the 43 accessions based on 11 microsatellite markers and their use to estimate Jaccard similarity coefficients and Bayesian analysis, forming six different genetic groups. Considering only the P. notatum accessions, great variability was observed with four distinct groups formed. The results presented in this work reveal the possibility to obtain assertive crosses between compatible parents, aiming to explore the genetic variability between and within species of this genus

Lambda-Baryon Production in pi(+-)n Interactions

The process of Lambda-baryon production in pi-p collisions is considered. The contribution of the string-junction mechanism to the strange baryon production in meson-baryon scattering is anlysed. The results of numerical calculations in the framework of the Quark-Gluon String model are in reasonable agreement with the data.Comment: 10 pages and 5 figue

Relating parton model and color dipole formulation of heavy quark hadroproduction

At high center of mass energies, hadroproduction of heavy quarks can be expressed in terms of the same color dipole cross section as low Bjorken-x deep inelastic scattering. We show analytically that at leading order, the dipole formulation is equivalent to the gluon-gluon fusion mechanism of the conventional parton model. In phenomenological application, we employ a parameterization of the dipole cross section which also includes higher order and saturation effects, thereby going beyond the parton model. Numerical calculations in the dipole approach agree well with experimental data on open charm production over a wide range of energy. Dipole approach and next to leading order parton model yield similar values for open charm production, but for open bottom production, the dipole approach tends to predict somewhat higher cross sections than the parton model.Comment: 16 pages, 4 figure

Perspectives in anaerobic digestion of lipid-rich wastewater

Lipid-rich wastewaters are ideal sources for methane production, but lipids are generally separated and removed prior to anaerobic treatment to avoid sludge flotation and microbial inhibition. In this work, we review the major technological and microbiological advances in the anaerobic digestion (AD) of lipids, while highlighting the most important breakthroughs in the field and identifying the future perspectives. In the past decades, several treatment processes have been developed for lipidrich wastewaters, moving from the upflow granular sludge based reactor designs to anaerobic membrane bioreactors and in situ flotation based bioreactors all now commercially available. Knowledge on the complexity of microbial communities and microbial interactions has increased greatly, allowing a better interpretation of lipids anaerobic biodegradation. However, there are still knowledge gaps and bottlenecks in lipids AD that need to be overcome to improve industrial applications. A multi-faceted approach with industrial and academic partners will provide a unique strategy for future widespread usage of waste-lipids as valuable resource for AD.The authors acknowledge the funding from EPA Research (Ireland), the Irish Dairy Processing Technology Centre, The Irish Research Council (EBPS2012) and the Microbiology Society; the Portuguese Foundation for Science and Technology (FCT) under the scope of the strategic funding of UID/BIO/04469/2013 unit and COMPETE 2020 (POCI-01-0145-FEDER-006684), of Project RECI/BBB-EBI/0179/2012 (FCOMP-01-0124-FEDER-027462), POCI-01-0145-FEDER-007679 (UID/CTM/50011/2013), and by BioTecNorte operation (NORTE-01-0145-FEDER-000004) funded by the European Regional Development Fund under the scope of Norte2020 - Programa Operacional Regional do Norte. The authors also acknowledge the financial support of the European Research Council under the European Union’s Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement no. 323009 and the funding of ANII-Uruguay, UNESCO-IHE and LATU (Uruguay).info:eu-repo/semantics/publishedVersio

Eficiência nutricional do milho em resposta a fontes e modos de aplicação de fósforo.

Em condicoes de campo, num Argissolo Vermelho tipico, textura argilosa, foi avaliada a eficiencia nutricional do milho adubado com quatro diferentes fontes de fosforo (superfosfato triplo, termofosfato magnesiano, fosfato reativo de Arad e fosfato de Araxa), em dois modos de aplicacao (a lanco em area total e no sulco de plantio). A dose aplicada correspondeu a 180 kg ha-1 de P2O5, considerando-se o teor total de P2O5 das fontes. Utilizou-se ainda um tratamento adicional sem aplicacao de P (testemunha). Foram analisados os teores de nutrientes nas folhas no florescimento e na parte aerea e graos ao final do ciclo da cultura. Determinaram-se a producao de graos, o acumulo de P e foram calculados indices de eficiencia nutricional do milho, em funcao dos tratamentos. Maior eficiencia foi obtida para os fertilizantes mais soluveis (superfosfato triplo e termofosfato magnesiano) distribuidos a lanco e para o fosfato reativo aplicado no sulco de plantio. O genotipo de milho foi bastante eficaz em utilizar o P absorvido, particularmente nos tratamentos com menor disponibilidade do nutriente no solo (fosfato de Araxa e testemunha), porem mostrou-se pouco responsivo a adubacao fosfatada