Sistema tradicional de manejo de caprinos: I. Desempenho de crescimento de caprinos SRD na fase de aleitamento

The effects of season, sex and type of birth as well as all possible interactions were studied for birth weight (BW), weights at 41 (W1), 69 (W2), 97 (W3), and 125 (W4) days after birth and weight gains at intervals between the time of birth and 41 days of age (G1), 41 and 69 days (G2), 69 and 97 days (G3), 97 and 125 days (G4) of age after birth. Data were initialy recorded on 120 kids born in the years 1979 and 1980 and raised at the Centro Nacional de Pesquisa de Caprinos research farm, Sobral, State of Ceará, Brazil. The analysis of variance showed that season of birth had a highly significant (P<0.005) effect on alt weights analysed and on G1 and G4. The significant level was smaller (P<0.025) for G2 and G3 . Kids born in the rainy season were heavier and had higher weight gains than kids born in the dry season. Sex had a significant influence on BW, W2, W4 (P<0.05), W3 (P<0.025), W1 and G1 (P<0.005). Males were superior to females, except in G4 where an inverse trend was observed. Type of birth was significant (P<0.005) for all the weight variables studied, including G1. Single born kids showed higher weight gains than did multiple born kids. With the exception of the season X type of birth interaction which was significant (P <0.025) for BW, all other interactions analized were none significant for the variables studied.Foram estudados os efeitos da estação, sexo e tipo de nascimento, bem como os das interações possíveis, sobre os pesos ao nascimento (PN); aos 41 (P1); aos 69 (P2); aos 97 (P3) e aos 125 (P4) dias de idade e sobre os ganhos de peso do nascimento aos 41 (G1); dos 41 aos 69 (G2); dos 69 aos 97 (G3) e dos 97 aos 125 (G4) dias de idade. Foram utilizados 120 cabritos, criados na área experimental do Centro Nacional de Pesquisa de Caprinos, em Sobral, CE, nascidos entre os anos de 1979 e 1980. As análises de variância indicaram que a estação de nascimento influenciou de maneira significativa (P<0,005) todos os pesos estudados, além das variáveis G1 e G4, e ao nível de P<0,025, as variáveis G2 e G3. Os animais nascidos na estação chuvosa foram mais pesados e apresentaram maior ganho de peso, em relação aos nascidos na estação seca. O sexo influenciou o P1 e G1 (P<0,005) e o PN, P2 e P4 (P<0,05) e P3 (P<0,025), sendo que, nessas variáveis, os machos foram superiores às fêmeas, exceto em G4, nas quais se observou tendência inversa. Houve influência do tipo de nascimento sobre todos os pesos estudados, inclusive sobre o G1, (P<0,005); os animais nascidos de partos simples mostraram maior ganho de peso que os nascidos de partos múltiplos. Com exceção da interação estação X tipo de nascimento, que influenciou de maneira significativa (P<0,025) o PN, as demais interações não apresentaram efeito significativo sobre as variáveis estudadas

An integrated genetic and physical map of the bovine X Chromosome

Genotypic data for 56 microsatellites (ms) generated from maternal full sib families nested within paternal half sib pedigrees were used to construct a linkage map of the bovine X Chromosome (Chr) (BTX) that spans 150 cM (ave. interval 2.7 cM). The linkage map contains 36 previously unlinked ms; seven generated from a BTXp library. Genotypic data from these 36 ms was merged into an existing linkage map to more than double the number of informative BTX markers. A male specific linkage map of the pseudoautosomal region was also constructed from five ms at the distal end of BTXq. Four informative probes physically assigned by fluorescence in situ hybridization defined the extent of coverage, confirmed the position of the pseudoautosomal region on the q-arm, and identified a 4.1-cM marker interval containing the centromere of BTX

Seminal magnetic fields from Inflato-electromagnetic Inflation

We extend some previous attempts to explain the origin and evolution of primordial magnetic fields during inflation induced from a 5D vacuum. We show that the usual quantum fluctuations of a generalized 5D electromagnetic field cannot provide us with the desired magnetic seeds. We show that special fields without propagation on the extra non-compact dimension are needed to arrive to appreciable magnetic strengths. We also identify a new magnetic tensor field $B_{ij}$ in this kind of extra dimensional theories. Our results are in very good agreement with observational requirements, in particular from TeV Blazars and CMB radiation limits we obtain that primordial cosmological magnetic fields should be close scale invariance.Comment: Improved version. arXiv admin note: text overlap with arXiv:1007.3891 by other author

A consensus linkage map of the chicken genome

A consensus linkage map has been developed in the chicken that combines all of the genotyping data from the three available chicken mapping populations. Genotyping data were contributed by the laboratories that have been using the East Lansing and Compton reference populations and from the Animal Breeding and Genetics Group of the Wageningen University using the Wageningen/Euribrid population. The resulting linkage map of the chicken genome contains 1889 loci. A framework map is presented that contains 480 loci ordered on 50 linkage groups. Framework loci are defined as loci whose order relative to one another is supported by odds greater then 3. The possible positions of the remaining 1409 loci are indicated relative to these framework loci. The total map spans 3800 cM, which is considerably larger than previous estimates for the chicken genome. Furthermore, although the physical size of the chicken genome is threefold smaller then that of mammals, its genetic map is comparable in size to that of most mammals. The map contains 350 markers within expressed sequences, 235 of which represent identified genes or sequences that have significant sequence identity to known genes. This improves the contribution of the chicken linkage map to comparative gene mapping considerably and clearly shows the conservation of large syntenic regions between the human and chicken genomes. The compact physical size of the chicken genome, combined with the large size of its genetic map and the observed degree of conserved synteny, makes the chicken a valuable model organism in the genomics as well as the postgenomics era. The linkage maps, the two-point lod scores, and additional information about the loci are available at web sites in Wageningen (http://www.zod.wau.nl/vf/ research/chicken/frame_chicken.html) and East Lansing (http://poultry.mph.msu.edu/)

A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector

A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb−1 of proton–proton collision data at collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle X is assumed to decay to a pair of light quarks, and the fully hadronic final state is analysed. The search considers the regime of high XH resonance masses, where the X and H bosons are both highly Lorentz-boosted and are each reconstructed using a single jet with large radius parameter. A two-dimensional phase space of XH mass versus X mass is scanned for evidence of a signal, over a range of XH resonance mass values between 1 TeV and 4 TeV, and for X particles with masses from 50 GeV to 1000 GeV. All search results are consistent with the expectations for the background due to Standard Model processes, and 95% CL upper limits are set, as a function of XH and X masses, on the production cross-section of the resonance

Measurement of the cross section for isolated-photon plus jet production in pp collisions at √s=13 TeV using the ATLAS detector

The dynamics of isolated-photon production in association with a jet in proton–proton collisions at a centre-of-mass energy of 13 TeV are studied with the ATLAS detector at the LHC using a dataset with an integrated luminosity of 3.2 fb−1. Photons are required to have transverse energies above 125 GeV. Jets are identified using the anti- algorithm with radius parameter and required to have transverse momenta above 100 GeV. Measurements of isolated-photon plus jet cross sections are presented as functions of the leading-photon transverse energy, the leading-jet transverse momentum, the azimuthal angular separation between the photon and the jet, the photon–jet invariant mass and the scattering angle in the photon–jet centre-of-mass system. Tree-level plus parton-shower predictions from Sherpa and Pythia as well as next-to-leading-order QCD predictions from Jetphox and Sherpa are compared to the measurements

Measurement of the View the tt production cross-section using eμ events with b-tagged jets in pp collisions at √s = 13 TeV with the ATLAS detector

This paper describes a measurement of the inclusive top quark pair production cross-section (σtt¯) with a data sample of 3.2 fb−1 of proton–proton collisions at a centre-of-mass energy of √s = 13 TeV, collected in 2015 by the ATLAS detector at the LHC. This measurement uses events with an opposite-charge electron–muon pair in the final state. Jets containing b-quarks are tagged using an algorithm based on track impact parameters and reconstructed secondary vertices. The numbers of events with exactly one and exactly two b-tagged jets are counted and used to determine simultaneously σtt¯ and the efficiency to reconstruct and b-tag a jet from a top quark decay, thereby minimising the associated systematic uncertainties. The cross-section is measured to be: σtt¯ = 818 ± 8 (stat) ± 27 (syst) ± 19 (lumi) ± 12 (beam) pb, where the four uncertainties arise from data statistics, experimental and theoretical systematic effects, the integrated luminosity and the LHC beam energy, giving a total relative uncertainty of 4.4%. The result is consistent with theoretical QCD calculations at next-to-next-to-leading order. A fiducial measurement corresponding to the experimental acceptance of the leptons is also presented

Search for dark matter produced in association with a hadronically decaying vector boson in pp collisions at sqrt (s) = 13 TeV with the ATLAS detector

A search is presented for dark matter produced in association with a hadronically decaying W or Z boson using 3.2 fb−1 of pp collisions at View the MathML sources=13 TeV recorded by the ATLAS detector at the Large Hadron Collider. Events with a hadronic jet compatible with a W or Z boson and with large missing transverse momentum are analysed. The data are consistent with the Standard Model predictions and are interpreted in terms of both an effective field theory and a simplified model containing dark matter