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1.
GWENDOLYN J. LEVINE WESLEY T. BISSETT ROBERT C. COLE JARED J. JANKE JAIRO NUNES BRIAN PORTER JONATHAN M. LEVINE 《Veterinary radiology & ultrasound》2006,47(6):585-588
A 3-year-old intact male Boer goat was evaluated for paraplegia. Computed tomography (CT) indicated the presence of diskospondylitis, which had previously not been reported in this species, and significant compressive myelopathy. Chronic bacterial pneumonia, epididymitis, nephritis, and soft-tissue abscesses were believed to result in hematogenous spread of bacteria to the affected disk spaces. Staphylococcus spp. and Archanobacterium pyogenes were both identified from postmortem cultures of the vertebral column. 相似文献
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The extensive debate over trade liberalization policies in the United States holds a general consensus that some industries will benefit while others will not. This paper explores the impact of the North American Free Trade Agreement on U.S. retailers in states located along the border with Mexico. Overall, the impact of trade on U.S. border retailers has been beneficial. However, the results demonstrate that retailers in the region are vulnerable to exchange rate fluctuations and other macroeconomic influences that change the relative price ratio between the United States and Mexico. Furthermore, retailers in metropolitan statistical areas that have a relatively high concentration of retail sector employment are more susceptible to these changes. 相似文献
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PHILIP JULL GEMMA L. WALMSLEY LIVIA BENIGNI NANNY WENZLOW EMMA L. RAYNER BRIAN A. SUMMERS GIUNIO B. CHERUBINI SANDRA SCHÖNIGER HOLGER A. VOLK 《Veterinary radiology & ultrasound》2011,52(6):653-657
Intramedullary masses are a dilemma due to the limited access for a nonsurgical biopsy, thus, accurate imaging characterization is crucial. Magnetic resonance imaging findings of two confirmed canine thoracic intramedullary hemangiomas are described. A capillary hemangioma was of mixed intensity but predominantly T2‐hyperintense and mildly T1‐hyperintense to spinal cord with strong contrast enhancement. A cavernous hemangioma had a target‐like appearance in both T1‐weighted (T1w) and T2‐weighted (T2w) images. In T2w images there was a small isointense center surrounded by a relatively large hyperintense area. In T1w images, there was a large isointense centre with a relatively small hyperintense periphery. Such characteristics should prioritize hemangioma as a consideration in a progressive myelopathy due to an intramedullary mass. 相似文献
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STACEY A. NICOLL DVM MVSc J. DAVID FOWLER DVM MVSc Diplomate ACVS AUDREY M. REMEDIOS DVM MVSc Diplomate ACVS J. BRIAN CLAPSON MD FRCS D. GEORGE MD FRCPC 《Veterinary surgery : VS》1996,25(1):40-48
Anatomic and experimental evaluation of the feline latissimus dorsi muscle was performed to assess its potential use as a free muscle flap. In the anatomic study, nonselective angiography of the subscapular artery was performed in nine heparinized feline cadavers. The muscle dimensions and vascular anatomy of the dissected latissimus dorsi muscle were recorded. In the experimental study four cats underwent heterotopic transplantation of a partial latissimus dorsi flap, and three cats underwent orthotopic transplantation of a complete latissimus dorsi flap. The mean length and width of the latissimus dorsi muscle was 19.0 and 5.4 cm, respectively. The dominant vascular pedicle was the thoracodorsal artery and vein. The average length and diameter of the thoracodorsal artery was 2.7 cm and 0.6 mm, respectively. Minor vascular pedicles were provided by branches of the intercostal arteries. Numerous choke anastomoses existed between the two pedicle systems. Viability of muscle flaps based on subjective evaluation, angiography, and histopathology, was 66% and 100% in the heterotopic and orthotopic studies, respectively. Flap failure seemed to be caused by both arterial and venous thrombosis. The latissimus dorsi muscle flap met criteria required for application in microvascular reconstruction. The vascular pattern was appropriate and consistent. Donor site morbidity was low, whereas surgical accessibility was high. The muscle satisfied the physical criteria of a free flap. Long-term anastomotic patency and flap viability was shown. 相似文献
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BRIAN C. GILGER dvm. MS. R. DAVID WHITLEY DVM MS. SUSAN A. MCLAUGHLIN dvm MS 《Veterinary surgery : VS》1994,23(1):53-58
A simplified lateral orbitotomy is described that decreases surgical time and lessens tissue dissection, yet maintains the exposure to the orbit provided by other orbitotomy techniques. The approach involves cutting the orbital ligament, incising the temporalis aponeurosis from the dorsal zygomatic arch, making parallel zygomatic arch osteotomies, and reflecting the zygomatic arch ventrally. Closure of the wound involves wiring the zygomatic arch back into place. This orbitotomy procedure provides excellent exposure for removal or biopsy of orbital masses. The use of this technique for surgical excision of orbital masses in two dogs, one with an adenoma of the third eyelid gland and one with an orbital fibrosarcoma, and their subsequent management is described. 相似文献
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ROBERT MARSH BRIAN PETRIE CHRISTOPHER R. WEIDMAN ROBERT R. DICKSON JOHN W. LODER CHARLES G. HANNAH KENNETH FRANK & KEN DRINKWATER 《Fisheries Oceanography》1999,8(1):39-49
A mass mortality of `warm-water' tilefish in the Middle Atlantic Bight between April and August of 1882 suggests an episode of extreme cold in the shelf waters off the north-eastern United States. This cooling is hypothesized to be a consequence of enhanced equatorwards transport of cold water in the Labrador Current, coincident with a minimum in the North Atlantic Oscillation (NAO) index during the early 1880s.
Although there is little direct evidence for this historical event, an analogue for the 1880s cooling is found in the 1960s, at the most recent NAO-index minimum. Post-1945 observations in the Middle Atlantic Bight / Gulf of Maine region reveal changes in winter baroclinic circulation between cool and warm decades, with greater equatorward penetration of south-westwards flow along the shelf-edge during the cool 1960s. Over the period 1934–77, the NAO is found to account for 17% of the interannual variance in Labrador Current transport around the Grand Banks.
Proxy evidence for the cold episode of the early 1880s is sought. Records of bottom temperature in the Middle Atlantic Bight region are reconstructed using stable oxygen isotopic analysis on the annual bands of shells of a bivalve mollusc ( Arctica islandica ) and an empirical model of covariability with local air temperature. The result is confirmation of the presence of anomalously cold water during the early 1880s. 相似文献
Although there is little direct evidence for this historical event, an analogue for the 1880s cooling is found in the 1960s, at the most recent NAO-index minimum. Post-1945 observations in the Middle Atlantic Bight / Gulf of Maine region reveal changes in winter baroclinic circulation between cool and warm decades, with greater equatorward penetration of south-westwards flow along the shelf-edge during the cool 1960s. Over the period 1934–77, the NAO is found to account for 17% of the interannual variance in Labrador Current transport around the Grand Banks.
Proxy evidence for the cold episode of the early 1880s is sought. Records of bottom temperature in the Middle Atlantic Bight region are reconstructed using stable oxygen isotopic analysis on the annual bands of shells of a bivalve mollusc ( Arctica islandica ) and an empirical model of covariability with local air temperature. The result is confirmation of the presence of anomalously cold water during the early 1880s. 相似文献
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MICHAEL J. WIDDERICK STEVEN R. WALKER BRIAN M. SINDEL KERRY L. BELL 《Weed Biology and Management》2010,10(2):102-112
Sonchus oleraceus (common sowthistle) is a dominant weed and has increased in prevalence in conservation cropping systems of the subtropical grain region of Australia. Four experiments were undertaken to define the environmental factors that favor its germination, emergence, and seed persistence. Seeds were germinated at constant temperatures between 5 and 35°C and water potentials between 0 and ?1.4 MPa. The maximum germination rate of 86–100% occurred at 0 and ?0.2 MPa, irrespective of the temperature when exposed to light (12 h photoperiod light/dark), but the germination rate was reduced by 72% without light. At water potentials of ?0.6 to ?0.8 MPa, the germination rate was reduced substantially by higher temperatures; no seed germinated at a water potential >?1.0 MPa. Emergence and seed persistence were measured over 30 months following seed burial at 0 (surface), 1, 2, 5, and 10 cm depths in large pots that were buried in a south‐eastern Queensland field. Seedlings emerged readily from the surface and 1 cm depth, with no emergence from below the 2 cm depth. The seedlings emerged during any season following rain but, predominantly, within 6 months of planting. Seed persistence was short‐term on the soil surface, with 2% of seeds remaining after 6 months, but it increased with the burial depth, with 12% remaining after 30 months at 10 cm. Thus, a minimal seed burial depth with reduced tillage and increased surface soil water with stubble retention has favored the proliferation of this weed in any season in a subtropical environment. However, diligent management without seed replenishment will greatly reduce this weed problem within a short period. 相似文献
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Summary. The effect of various environments on the degree of desiccation and of residues in King Edward and Majestic potatoes was studied. The higher residues frequently associated with the variety King Edward are ascribed from glasshouse experiments to greater diquat movement; they could not be accounted for by differences in uptake between the two varieties.
In glasshouse experiments, uptake was increased both by high air humidities and reduced light intensities before and after treatment. Since earlier work with cocksfoot and wheat indicated that dry soil conditions markedly increased movement, it is concluded that dull, humid air conditions associated with dry soil would be most conducive to efficient haulm desiccation and also to highest residues in the tubers. Late afternoon or evening treatment often provides thes conditions, and residues were in fact least from morning treatment.
In the field, increases in haulm desiccation were associated with reductions in residues. As they were observed only at light intensities below 5000 lux, they are unlikely to occur in normal dull weather.
Rain falling soon after spraying did not reduce the extent of haulm desiccation or diquat residues.
Influence de I'enviromurtunt sur la destruction des fanes de pomme de terre par le diquat el sur ses 相似文献
In glasshouse experiments, uptake was increased both by high air humidities and reduced light intensities before and after treatment. Since earlier work with cocksfoot and wheat indicated that dry soil conditions markedly increased movement, it is concluded that dull, humid air conditions associated with dry soil would be most conducive to efficient haulm desiccation and also to highest residues in the tubers. Late afternoon or evening treatment often provides thes conditions, and residues were in fact least from morning treatment.
In the field, increases in haulm desiccation were associated with reductions in residues. As they were observed only at light intensities below 5000 lux, they are unlikely to occur in normal dull weather.
Rain falling soon after spraying did not reduce the extent of haulm desiccation or diquat residues.
Influence de I'enviromurtunt sur la destruction des fanes de pomme de terre par le diquat el sur ses 相似文献