Effects of induced lameness via carpal osteochondral fragmentation on plasma creatine kinase activity in horses     

K Chaney  JM MacLeay  RM Enns  F Al-Sobayil  C Kawcek  D Frisbie 《Journal of Equine Veterinary Science》2004,24(12):531-534

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Do Computer‐Assisted,Morphometric‐Derived Sperm Characteristics Reflect DNA Status in Canine Spermatozoa?     

I Núñez-Martinez  JM Moran  FJ Peña 《Reproduction in domestic animals》2005,40(6):537-543

It is widely accepted that sperm morphology is a strong indicator of semen quality. As the sperm head mainly comprises the sperm DNA, it is have been proposed that subtle changes in sperm morphology may be related to abnormal DNA content. Semen from four mongrel dogs was used to investigate DNA quality by means of the sperm chromatin structure assay (SCSA), and for computerized sperm morphometry (CASMA). Each sperm head was measured for nine primary parameters [head area (A), head perimeter (P), head length (L), head width (W), midpiece width (w), midpiece area (a), distance (d) between the major axes of the head and midpiece, angle (theta) of divergence of the midpiece from the head axis] and four parameters of head shape [FUN1, L/W; FUN2, 4piA/P(2); FUN3, (L - W)/(L + W); FUN4, piLW/4A]. Significant differences were found in all CASMA-derived parameters among dogs (p < 0.001). Linear regression models including sperm head shape factors 1, 3 and 4 predicted the extent of DNA denaturation (p < 0.001). We conclude that the CASMA analysis can be considered a powerful tool to improve the spermiogram.  相似文献   

Challenges in Pig Artificial Insemination   总被引：4，自引：0，他引：4  

J Roca  JM Vázquez  MA Gil  C Cuello  I Parrilla  EA Martínez 《Reproduction in domestic animals》2006,41(S2):43-53

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A Three-Step Statistical Procedure to Identify Sperm Kinematic Subpopulations in Canine Ejaculates: Changes after Cryopreservation     

I Núñez-Martínez  JM Moran  FJ Peña 《Reproduction in domestic animals》2006,41(5):408-415

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Impacts of pollutant inputs on forest canopy condition in the UK: possible role of P limitations   总被引：1，自引：0，他引：1  

Harrison  AF; Carreira  J; Poskitt  JM; Robertson  SMC; Smith  R; Hall  J; Hornung  M; Lindley  DK 《Forestry》1999,72(4):367-378

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Low prevalence of antimicrobial resistant organisms (methicillin resistant Staphylococcus aureus,extended beta-lactamase producing Enterobacteriaceae,and vancomycin resistant enterococci) in bulk tank milk in New South Wales,Australia     

S Rowe  C Cunningham  L Ingenhoff  JM Norris  RN Zadoks 《Australian veterinary journal》2023,101(9):339-344

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Incidence,cause, outcome and possible risk factors associated with facial nerve paralysis in dogs in a Sydney population (2001–2016): a retrospective study     

MK Chan  J-ALML Toribio  JM Podadera  G Child 《Australian veterinary journal》2020,98(4):140-147

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Prevalence of dental and mandibular disorders in culled sheep in Spain     

M Ruiz de Arcaute  LM Ferrer  D Lacasta  JM González  M De las Heras  M Borobia  JJ Ramos 《Australian veterinary journal》2020,98(9):438-441

At the slaughterhouse, 1465 culled sheep heads were studied in order to identify disorders of the mandibular cheek teeth. Of these, 227 (15.5%) had evidence of osteomyelitis. The lesional profile showed that the mandible was affected in a similar proportion on both sides (46.7% on the right side vs 50.7% on the left side), mainly in the middle region (55.3%) and with most of the lesions closed without fistulisation (89.4%). In addition, swelling was palpable, with an increase in thickness in the area of the affected body (2.65 ± 0.065 cm vs 1.74 ± 0.030 cm). In 78.6% of the animals, the regional lymph nodes were enlarged. Concerning the mandibular cheek teeth, more than half of the animals lacked at least one tooth (57.0%), with the first premolar being the most frequently missing tooth (34.8%) and the third molar the least (8.2%). The impaction of food around the teeth was very common with the posterior molars being more frequently affected. In the knowledge of the authors, this is the first study that analyses the prevalence of mandibular molar and premolar disorders in sheep, and these are revealed as an important condition affecting culled sheep.  相似文献   

Chaotic Dynamics in an Insect Population     

RF Costantino  RA Desharnais  JM Cushing  B Dennis 《Science (New York, N.Y.)》1997,275(5298):389-391

A nonlinear demographic model was used to predict the population dynamics of the flour beetle Tribolium under laboratory conditions and to establish the experimental protocol that would reveal chaotic behavior. With the adult mortality rate experimentally set high, the dynamics of animal abundance changed from equilibrium to quasiperiodic cycles to chaos as adult-stage recruitment rates were experimentally manipulated. These transitions in dynamics corresponded to those predicted by the mathematical model. Phase-space graphs of the data together with the deterministic model attractors provide convincing evidence of transitions to chaos.  相似文献   

Design of Nonionic Surfactants for Supercritical Carbon Dioxide     

JB McClain  DE Betts  DA Canelas  ET Samulski  JM DeSimone  JD Londono  HD Cochran  GD Wignall  D Chillura-Martino  R Triolo 《Science (New York, N.Y.)》1996,274(5295):2049-2052

Interfacially active block copolymer amphiphiles have been synthesized and their self-assembly into micelles in supercritical carbon dioxide (CO2) has been demonstrated with small-angle neutron scattering (SANS). These materials establish the design criteria for molecularly engineered surfactants that can stabilize and disperse otherwise insoluble matter into a CO2 continuous phase. Polystyrene-b-poly(1,1-dihydroperfluorooctyl acrylate) copolymers self-assembled into polydisperse core-shell-type micelles as a result of the disparate solubility characteristics of the different block segments in CO2. These nonionic surfactants for CO2 were shown by SANS to be capable of emulsifying up to 20 percent by weight of a CO2-insoluble hydrocarbon into CO2. This result demonstrates the efficacy of surfactant-modified CO2 in reducing the large volumes of organic and halogenated solvent waste streams released into our environment by solvent-intensive manufacturing and process industries.  相似文献