Physiological measurements of Missouri Fox Trotters and Quarter Horses performing a standardized exercise test     

K.L. SpruellG.W. Webb  S.P. WebbM. Burton  E.L. Walker 《Journal of Equine Veterinary Science》2013

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How do hedgerows influence soil organic carbon stock in livestock‐grazed pasture?     

Hilary Ford  John R. Healey  Bid Webb  Tim F. Pagella  Andrew R. Smith 《Soil Use and Management》2019,35(4):576-584

Hedgerows have the potential to influence ecosystem function in livestock‐grazed pasture. Despite this, they are often ignored when quantifying farmland ecosystem service delivery. In this study, we assess the contribution of hedgerows to the ecosystem function of carbon (C) storage, with a particular emphasis on soil organic carbon (SOC). We measured SOC stock (kg C m^?2), on an equivalent soil mass basis, at 0–0.15 m depth in pasture adjacent to 38 hedgerows (biotic) and 16 stone walls or fences (abiotic controls) across ten farms in the county of Conwy, Wales, UK. Pasture SOC stock (~7 kg C m^?2) was similar adjacent to biotic and abiotic field boundaries, positively associated with soil moisture and negatively with soil bulk density (BD). For biotic boundaries, two further variables were significantly associated with SOC stock, distance from hedgerow (decrease in SOC stock) and slope orientation (upslope SOC stock greater than downslope). For pasture adjacent to hedgerows, a model combining the aforementioned variables (BD, soil moisture, distance from hedgerow, slope orientation) explained 78% of variation in SOC stock. This study demonstrates that whilst hedgerows do have subtle positive effects on SOC stock in adjacent pasture, SOC storage adjacent to field boundaries is influenced more by soil moisture content and BD than field boundary type.  相似文献   

Psoroptic mange in cattle in south Wales     

Jones J  Jenkins T  Webb L  Davies A  Bates P 《The Veterinary record》2008,162(14):460

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Oxidative stress and liver disease.     

Craig Webb  David Twedt 《Veterinary Clinics of North America: Small Animal Practice》2008,38(1):125-35, v

Pro-oxidants are numerous and varied. Antioxidants are equally varied in their mechanism of action, and oxidative stress is likely not a simple arithmetic summation of these two opposing forces. More likely, it is a complex set of interrelated formulas with large areas of overlap and small areas of unique effect. In this article, the language of oxidative stress is reviewed, the consequences of oxidative stress are presented, the pathophysiology of oxidative stress in the liver is briefly discussed, and various antioxidant treatment options most relevant to small animal patients with liver disease are reviewed.  相似文献   

Lymphatic endothelial cell immunohistochemical markers for evaluation of the intestinal lymphatic vasculature in dogs with chronic inflammatory enteropathy     

Sara A. Wennogle  Simon L. Priestnall  Alejandro Surez‐Bonnet  Sirikul Soontararak  Craig B. Webb 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2019,33(4):1669-1676

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Adult Plant Phenotype of the Rp1-DJ Compound Rust Resistance Gene in Maize     

Hu G  Webb CA  Hulbert SH 《Phytopathology》1997,87(3):236-241

ABSTRACT The complex structure of the rp1 rust resistance locus of maize allows two or more resistance genes to be recombined together in coupling phase. The phenotypic effects of the Rp1-DJ compound gene, which carries both Rp1-D and Rp1-J, were analyzed. The Rp1-DJ compound gene was associated with a chlorotic spotting phenotype in some genetic backgrounds. At the seedling stage, lines carrying Rp1-DJ are fully susceptible to Puccinia sorghi biotype HI1, which is virulent on lines with the two genes singly. At later stages of growth, however, Rp1-DJ lines show partial resistance when compared with sibling lines not carrying the compound gene. The Rp1-DJ gene also confers partial resistance to P. polysora in adult plants.  相似文献   

Neutrophil function in septic dogs     

Webb C  McCord K  Dow S 《Journal of veterinary internal medicine / American College of Veterinary Internal Medicine》2007,21(5):982-989

BACKGROUND: Leukocytes appear to enter a hypo-inflammatory state in human patients with a severe bacterial infection, whereas, in swine, intra-abdominal sepsis produces an initial increase and subsequent decrease in neutrophil Fc receptor mediated phagocytosis. HYPOTHESIS: Impaired neutrophil function (hypo-inflammatory state) develops in dogs with sepsis. ANIMALS: Thirteen adult client-owned dogs that developed clinical signs consistent with sepsis were assessed for evidence of neutrophil dysfunction. These results were compared with those of 12 healthy dogs. METHODS: Flow cytometry combined with the appropriate fluorescent markers allowed for quantification of the phagolysosomal oxidative burst after Fc receptor-mediated phagocytosis of immune complexes, neutrophil phagocytosis of opsonized Escherichia coli, and the intracellular concentration of reduced glutathione as a measure of oxidative stress. RESULTS: The phagolysosomal oxidative burst after Fc receptor-mediated phagocytosis was significantly lower in neutrophils from septic dogs (mean fluorescence intensity +/- standard deviation; 118 +/- 13 and 165 +/- 27 for septic and control dogs, respectively, p = 0.001), although the phagocytosis of opsonized E. coli was significantly increased (155 +/- 74 and 77 +/- 44 for septic and control dogs, respectively, p = 0.004). Intracellular reduced glutathione was not significantly different in neutrophils from septic and healthy control dogs. CONCLUSIONS: An important component of neutrophil function is decreased in septic dogs. The diminished oxidative burst after Fc receptor-mediated phagocytosis in neutrophils from septic dogs could hinder the ability of the innate immune system to clear bacterial infections or it might help protect these patients from the systemic consequences of infection.  相似文献   

Inheritance and expression of transgenes in T2 and T3 generations of Lotus corniculatus transformed using Agrobacterium tumefaciens   总被引：2，自引：0，他引：2  

K. Judith Webb  Mervyn O. Humphreys  Leif Skøt  Margaret Gibbs  John Gatehouse 《Euphytica》1999,108(3):169-179

The inheritance and expression of the reporter gene uidA, encoding β-glucuronidase (GUS), was previously analysed in the T₁ generation of 25 independent transformed lines of Lotus corniculatus cv. Leo. In the work reported here, GUS activity in various tissues of seven of these lines was tested in the T₂ generation. Four representative lines were chosen for more detailed study in the T₃ generation. Lines 25 and 38 had multiple, independently segregating transgene inserts; lines 24 and 39 appeared to transmit one segregating transgene insert to their T₁ progeny, although transgene expression was low and was detected in fewer seedlings than expected in line 39. The uidA gene was inherited and expressed in seedlings of T₁, T₂ and T₃ generations of all four lines. In all lines, transgene expression varied between tissues, with more embryos than seedlings having detectable GUS activity. Studies in the T₂ generation showed that use of transgenic plants as female or male parents altered the frequency of expression of the transgene in progeny. By contrast, in the T₃ generation the use of transgenic plants as female or male parents did not effect either frequency of transmission, or expression of the transgene, in any of the four lines. Transgene inheritance was also similar among individual pods within flower heads and between individual flower heads. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Tissue distribution of a peptide transporter mRNA in sheep, dairy cows, pigs, and chickens.   总被引：8，自引：0，他引：8  

H Chen  E A Wong  K E Webb 《Journal of animal science》1999,77(5):1277-1283

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Intravenous regional anesthesia (Bier block) in a dog.          下载免费PDF全文

A A Webb  S L Cantwell  T Duke    E Adkins 《The Canadian veterinary journal. La revue veterinaire canadienne》1999,40(6):419-421

Intravenous regional anesthesia was used in an adult dog as part of a balanced approach to general anesthesia for amputation of the 4th digit of its right hind limb. It allowed the concentration of isoflurane to be reduced to 0.5%.  相似文献