Influência do cruzamento na qualidade de couros bovinos.

Em 2007 o Brasil exportou US$ 2,19 bilhão de couros bovinos, porém, de baixa qualidade extrínseca, principalmente devido aos ectoparasitas. Apesar da preponderância dos zebuínos no rebanho brasileiro, os taurinos são muito empregados em cruzamentos industriais e, quanto maior sua participação nos cruzamentos, maior será a suscetibilidade à infestação por carrapatos, um dos principais responsáveis pelas marcas que contribuem para a redução da qualidade extrínseca dos couros. Os bovinos cruzados CSN - canchim (macho) x simental-nelore (fêmea), CAN - canchim (macho) x angus-nelore (fêmea), ANCAR - angus (macho) x nelore-caracu (fêmea) e CARNEL - caracu (macho) x nelore (fêmea) foram criados a pasto e terminados em confinamento, com dois anos de idade. Grande parte dos couros (78,05 %) apresentou boa qualidade extrínseca, outra parte, média qualidade (19,51 %) e o restante, qualidade inferior (2,44 %). Os cruzamentos ANCAR e CARNEL apresentaram, respectivamente, couros com maior e menor resistência nos testes de tração e rasgamento (P<0,10). Essa diferença foi devido à maior integridade de estrutura do couro dos animais do cruzamento ANCAR, pois, por serem mais finos, não tiveram, na divisão e no rebaixamento, grande perda de estrutura dérmica, como ocorreu com os couros mais espessos dos animais do cruzamento CARNEL. Concluiu-se que o cruzamento racial influenciou a qualidade dos couros analisados

Padronização de técnica de PCR para diagnóstico de infecções por Babesia bovis.

Resumo.Fernando Flores Cardoso, Daniel Portella Montardo, José Carlos Ferrugem Moraes, Marcos Flávio Silva Borba, Sandro da Silva Camargo, editores técnicos

Factors affecting the performance of Pantaneiro horses.

This study aimed to assess the physical performance of Pantaneiro horses with and without equine infectious anemia (EIA) under functional conditions of cattle management. The horses were subjected to a performance test and split into two groups according to a completely randomized design: animals were chosen from populations testing positive and negative for EIA. Performance was measured as a function of a data envelopment analysis (DEA) model considering four outputs and one unitary input. The output measures were the distance achieved in the performance test, hematocrit as a weighted average over the test duration, respiratory rate as weighted average over the test duration, and the level of lactic acid at the test termination. Weights for the hematocrit and the respiratory rate output variables were determined by means of factor analysis. The performance score was a weighted average of the output variables with the weights defined by the averages of the optimum individual multipliers in the DEA analysis. Contextual variables of interest were age, horse weight, room temperature, and corporal temperature. Only groups and room temperature were statistically significant effects, as indicated by a bootstrap analysis. The performance of group positive for EIA is significantly lower than that of the group negative for EIA and room temperature has a negative effect

Prospecção de proteínas de glândula salivar de Rhipicephalus (Boophilus) microplus que induzem resposta imunológica de bovinos Angus resistentes e sensíveis ao parasitismo.

Este trabalho investigou proteínas relacionadas com resposta imunológica de bovinos contra o carrapato, de forma comparativa entre animais resistentes e sensíveis ao parasitismo.Claudia Cristina Gulias Gomes, editora técnica

Ensaio alternativo para triagem de extratos protéicos com atividade celulolítica.

Este comunicado apresenta uma metodologia de difusão radial em gel de agarose (DRGA) desenvolvida por Teather e Wood (1982), modificada por Rehman et al. (2009), e adaptada no Laboratório de Bioquímica da Embrapa Caprinos e Ovinos para avaliar a atividade celulolítica em extratos proteicos de microrganismos ruminais. A técnica baseia-se na difusão radial, em gel de agarose, das proteínas da amostra analisada. O gel contém o substrato específico para celulase, a carboximetilcelulose, que pode ser corada com o corante vermelho congo.bitstream/item/31686/1/UMT-Cot112.pd

The effect of concentrate supplementation on methane emission intensity of cattle grazing tropical pastures in the dry season.

he reported effect is due to a combination of increased gain, as forage is used more efficiently, and the improvement in diet digestibility due to a direct (higher digestibility) and indirect effect (improved rumen ermentation) caused by concentrate supplementation. It can be concluded that supplementation is an effective strategy to reduce GHG emission intensity in tropical areas with a well-defined and long lasting dry season as it occurs in Brazil

Análises químicas de fertilizantes orgânicos (urbanos).

Amostragem e preparo da amostra. Preparação da amostra para análise. Patógenos em resíduos. Interpretação de resultados de amostras de fertilizantes orgânicos. Lodo de esgoto: particularidades. Determinação do efeito da adição de resíduos contendo matéria orgânica ao solo

Effectiveness of Chitosan Films Impregnated With Ciprofloxacin for the Prophylaxis of Osteomyelitis in Open Fractures: An Experimental Study in Rats

Background: The systemic antimicrobial prophylaxis is the standard treatment in the prevention of osteomyelitis after open fractures, with topical application of antimicrobials as an alternative due to their high concentrations at the site of the fracture, low systemic concentrations and fewer side effects. Objectives: This study aimed to evaluate the effectiveness of prophylaxis of osteomyelitis through experimental model of open fractures with the use of chitosan films, whether or not impregnated with ciprofloxacin. Materials and Methods: In this experimental study, 24 Holtzman rats were distributed into 4 groups of 6 rats each. The CT (control of treatment) group: an open fracture model treated with systemic antimicrobial; the IC (infection control) group: an open fracture untreated model; the C (chitosan) group: an open fracture model treated using a chitosan film; and the CA (chitosan with antimicrobial) group: an open fracture model treated using a chitosan film impregnated with antimicrobial. After 3 weeks the animals were killed by an overdose of anesthetic, and a fragment osseous was removed for histological and microbiological analysis. The comparisons between the groups considered significant values of P ≤ 0.05. Results: In cultures of the CT group, there was less bacterial growth compared to the results of the cultures of the IC (P = 0.005), C (P = 0.005) and CA (P = 0.009) groups. The inflammation was lower in the CT group compared to the IC (P = 0.014), C (P = 0.001) and CA (P = 0.007) groups. Conclusions: In this experimental model of open fracture, the chitosan film pure or impregnated with ciprofloxacin was not effective in the prophylaxis of osteomyelitis