Scanning electron microscope study of the feather follicle wall attachment in chickens     

S. Angel  M. Hyams  I. M. Levinger 《British poultry science》1982,23(3):247-249

1. A scanning electron microscope study showed indentations by the follicle wall cells into the feather shaft. In other areas altered cells or keratinised cell fragments form bridges which join the feather to the follicle.

2. In the early stage of growth the feather shaft is held in place by cell indentations, whereas later, bridges are seen which probably hold the feather more firmly.  相似文献   

Cover Image          下载免费PDF全文

Eva Patricia López‐Damián  José Alfredo Jiménez‐Medina  Miguel Angel Lammoglia  Jaime Arturo Pimentel  Lourdes Teresa Agredano‐Moreno  Chris Wood  Carlos Salvador Galina  Tatiana Fiordelisio 《Anatomia, histologia, embryologia》2018,47(5):i-i

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Serologic and fecal markers to predict response to induction therapy in dogs with idiopathic inflammatory bowel disease          下载免费PDF全文

Cristiane C. Otoni  Romy M. Heilmann  Mercedes García‐Sancho  Angel Sainz  Mark R. Ackermann  Jan S. Suchodolski  Jörg M. Steiner  Albert E. Jergens 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2018,32(3):999-1008

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Estimating the economic performance of the EU aquaculture sector     

Jordi Guillen  Fabrizio Natale  José M. Fernández Polanco 《Aquaculture International》2015,23(6):1387-1400

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Validation of new automated turbidimetric immunoassays for the measurement of haptoglobin and inter-α-trypsin inhibitor heavy chain H4 specific for the bovine species     

Anna Bassols  José Angel Robles-Guirado  Laura Arroyo  Lourdes Soler  Natalia García  Raquel Pato  Raquel Peña  Yolanda Saco  Ramon Armengol  Fermín Lampreave  María A. Alava  Francesca Canalias  Matilde Piñeiro 《Veterinary clinical pathology / American Society for Veterinary Clinical Pathology》2023,52(Z1):64-74

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Determinants of income-earning strategies and adoption of conservation practices in hillside communities in rural Honduras     

Hans G.P. Jansen  Angel Rodriguez  Amy Damon  John Pender  Jacqueline Chenier  Rob Schipper 《Agricultural Systems》2006

Based on the results of participatory diagnostic surveys conducted in 95 rural communities in the hillsides of Honduras, we determine income earning strategies at the community level; identify their main determinants; and analyze the adoption of of conservation practices. Eight income-earning strategies were distinguished that reflect differences in comparative advantage between communities. We explain the choice of income earning strategy using a multinomial logit model that includes biophysical, economic, social and institutional variables. We use a probit model to show that adoption of conservation practices is determined by the type of income earning strategy, population density, market access, and organizational variables.  相似文献   

Inhibition of pheromone action in Sesamia nonagrioides by Haloacetate analogues     

Magi Riba  Matilde Eizaguirre  Albert Sans  Carmen Quero  Angel Guerrero 《Pest management science》1994,41(2):97-103

The electrophysiological activity of some halogenated analogues of the major component of the sex pheromone of the corn stalk borer Sesamia nonagrioides Lef. (1) is presented. The analogues comprise a series of fluoro-, chloro- and bromoacetate analogues 4 – 10 as well as trifluoromethyl ketone 11. The fluoro derivatives 4 – 6 displayed remarkable electro-antennogram (EAG) intrinsic activities in comparison with the parent acetate 1, while the remaining analogues elicited significantly lower response. The compounds have also been tested as inhibitors of the sex pheromone perception in EAG and in the field. In the laboratory. fluoro analogues 4 – 6 were better inhibitors than chloro derivatives 7 – 9 , which in turn behaved similarly to the bromoacetate 10 . Trifluoromethyl ketone 11, however, was a poor inhibitor of the pheromone action. In the field, baits of mixtures of compounds 5 – 11 with the corn stalk borer pheromone in 10 :1 ratio inhibited the concomitant attraction of the clover cutworm moth Scotogramma irifolii Rott., while the difluoro analogue 5, trichloroacetate 9 and trifluoromethyl ketone 11 also diminished the number of catches of the armyworm Mythimna unipuncta Haw. The monofluoroacetate 4. trifluoro analogue 6 and bromo derivative 10 significantly disrupted the pheromone action of the corn borer, whereas trifluoromethyl ketone 11 synergistically increased the number of males attracted to the pheromone trap alone. Addition of 11 to baits containing the corn borer pheromone caught S. nonagrioides selectively with regard to the other habitat-sharing species M. unipuncta and S. trifolii.  相似文献   

Use of touch-down polymerase chain reaction to enhance the sensitivity of Mycobacterium bovis detection.   总被引：4，自引：0，他引：4  

Martín J Zumárraga  Virginia Meikle  Amelia Bernardelli  Alejandro Abdala  Hector Tarabla  María I Romano  Angel Cataldi 《Journal of veterinary diagnostic investigation》2005,17(3):232-238

The confirmatory diagnosis of Mycobacterium bovis (M. bovis) in animal samples is carried out by culture in Stonebrink media. However, culture is very slow because of the extremely long duplication time of the bacillus and difficult because of the scarcity of bacilli in diagnostic samples. This study describes the development of a single-tube touch-down polymerase chain reaction (PCR) protocol for the detection of M. bovis using primers that target the IS6110 element. Spiked water and milk as well as routine diagnostic samples (milk and nasal swabs) from M. bovis-positive cattle were tested. This protocol allows the rapid and sensitive detection of M. bovis in bovine samples by enhancing the sensitivity of standard PCR amplification.  相似文献   

Observational study of factors associated with nursery pig performance          下载免费PDF全文

Angel de Grau  Catherine Dewey  Robert Friendship    Kees de Lange 《Canadian journal of veterinary research》2005,69(4):241-245

The objective of this study was to determine the association between body weight of pigs at 7 wk of age, specific management factors, and previous body weight. Among 3736 pigs from 8 commercial farms, greater 7-wk weight was associated with greater birth weight (P = 0.001), greater weaning weight (P = 0.001), and earlier age at weaning (P = 0.001). Farms with the earliest average weaning age had the highest health status. Farms with later weaning ages tended to use nurse sows for light-weight pigs. Pigs from farms using all-in/all-out management in the nursery had greater 7-wk weights (P = 0.01). The total mortality and culling rate during the nursery phase (weaning to approximately 7 wk of age) was 6.8%. Higher losses were observed among pigs with low weaning weights (< 4.1 kg) compared with those with higher weaning weights. More of the variation due to 7-wk weight was due to individual sow rather than to farm of origin.  相似文献   

Evaluation of a specific immunochemotherapy for the treatment of canine visceral leishmaniasis     

Guarga JL  Moreno J  Lucientes J  Gracia MJ  Peribáñez MA  Castillo JA 《Veterinary immunology and immunopathology》2002,88(1-2):13-20

The efficacy of specific immunochemotherapy against Leishmania infantum infection in dog was studied. The effects on transmission of the disease, as well as the cellular and humoral immune response were examined. The treated animals showed a significant reduction in the infection rates that were detected in Phlebotomus perniciosus females fed on the dog. The humoral immune response, assayed with an indirect immunofluorescence antibody test (IFAT), did not show significant variations under the influence of the therapy. The characterisation of the peripheral blood mononuclear cells (PBMC) using flow cytometry indicated a significant increase in the proportion of T lymphocytes, especially of CD4/TcR(alpha)(beta)(+) and CD4/CD45RA(+) cells, without showing evidence for modifications in the other leukocyte subsets. Cellular lymphoproliferation studies indicated a lack of a specific response to soluble leishmanial antigen (SLA), but the non-specific lymphoproliferative capacity assayed with phytohemagglutinin (PHA) was maintained.  相似文献