The specificity of lymphofollicular lesions in the diagnosis of chronic respiratory disease     

JOHNSON EP 《The Cornell veterinarian》1954,44(2):230-239

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CANINE PARVOVIRUS VACCINE     

J. R. SMITH  R. H. JOHNSON  T. S. FARMER 《Australian veterinary journal》1980,56(12):611-612

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TRITRICHOMONAS FOETUS AGGLUTINATION TESTS UPON SAMPLES COLLECTED FROM CATTLE: CROSS-REACTIONS ASSOCIATED WITH VACCINATION AGAINST CAMPYLOBACTER FETUS SUBSP VENEREALIS   总被引：1，自引：0，他引：1  

R. L. REECE †  D. P. DENNETT  R. H. JOHNSON 《Australian veterinary journal》1981,57(7):352-353

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Atomized distemper vaccine of avian origin. II. Field experience in mink     

JOHNSON DW  CABASSO VJ  HUFFMAN K  STEBBINS MR 《American journal of veterinary research》1957,18(68):668-671

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AIDS TO VETERINARY NURSING     

R. P. JOHNSON 《Australian veterinary journal》1973,49(3):119-119

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The treatment of ketosis with glycerol and propylene glycol   总被引：5，自引：0，他引：5  

JOHNSON RB 《The Cornell veterinarian》1954,44(1):6-21

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Biomechanical Study of Canine Spinal Fracture Fixation Using Pins or Bone Screws With Polymethylmethacrylate     

JOSEPH NATHANIEL P. GARCIA dvm    BRUCE K. MILTHORPE PHD    DAVID RUSSELL  KENNETH A. JOHNSON MVSC  PhD  FACVSc  Diplomate ACVS 《Veterinary surgery : VS》1994,23(5):322-329

Five configurations of pins or screws interconnected with polymethylmethacrylate (PMMA) were applied to isolated canine lumbar spines (L2 to L5) in which a complete fracture-luxation had been produced at L3 to L4. Twenty-five repaired spines and five intact control spines were subjected to four-point bending and tested once to failure in ventral flexion. The purpose of this study was to determine the effects of pin number, pin angle, and use of 3.5-mm cortical bone screws instead of smooth 3.2-mm diameter pins on rigidity and ultimate strength of spinal fractures repaired by the implant-PMMA fixation technique. Bending moment versus the angular deformation curves were recorded. Rigidity, bending moment at 10° angular deformation, moment at failure, and deformation at failure of each type of fixation were compared using analysis of variance. Spinal segments stabilized with eight pin-PMMA fixation had significantly greater rigidity and strength at failure than four pin-PMMA fixations ( P < .05). Furthermore, spinal segments stabilized with eight pins angled away from the fracture failed at significantly greater bending moment than those with eight pins angled toward the fracture ( P < .05). However, for four-pin fixation, greater strength was achieved by angling pins in the bone toward the fracture site ( P < .05). Screw-PMMA fixations failed by screw bending and were less rigid and weaker at failure than the corresponding configuration of pin-PMMA fixation ( P < .05).  相似文献   

美国路易斯安那州铁矿石土壤薄层磐层的表征特性     

D. C. WEINDORF  N. BAKR  Y. ZHU  B. HAGGARD  S. JOHNSON  J. DAIGLE 《土壤圈》2010,20(4):409-418

Placic horizons, defined as thin, wavy, hardened layers of iron and organic matter, are rare within the United States, occurring only in Washington, Alaska, and Hawaii. While ironstone is common in many soils of the southeastern United States, it is not known to contain appreciable organic matter. As a pilot study evaluating the justification for a larger study on ironstone in Louisiana, a 40 m lateral exposure with suspected placic horizons was evaluated in Vernon Parish, Louisiana. Results of laboratory analysis show elevated levels of iron and organic matter in the suspect horizons that meet the criteria of placic horizons as defined by the Soil Survey Staff. Based on the results of this study, additional evaluation of multiple pedons with similar features is warranted. Should additional pedons demonstrate similar properties, a new great group of ‘Petrudepts’ would be needed to describe both the placic horizons in the pedon and the udic moisture regime in which they occur.  相似文献   

Comparison of continuous infusion with intermittent bolus administration of cefotaxime on blood and cavity fluid drug concentrations in neonatal foals     

J. HEWSON  R. JOHNSON  L. G. ARROYO  A. DIAZ‐MENDEZ  J. A. RUIZ‐LÓPEZ  Y. GU  J. R. E. Del CASTILLO 《Journal of veterinary pharmacology and therapeutics》2013,36(1):68-77

Hewson, J., Johnson, R., Arroyo, L. G., Diaz‐Mendez, A., Ruiz‐López, J. A., Gu, Y., del Castillo, J. R. E. Comparison of continuous infusion with intermittent bolus administration of cefotaxime on blood and cavity fluid drug concentrations in neonatal foals. J. vet. Pharmacol. Therap.  36 , 68–77. Healthy neonatal foals were treated with cefotaxime by bolus (40 mg/kg IV q6h for 12 doses; n = 10) or by infusion (loading dose of 40 mg/kg IV followed by continuous infusion of a total daily dose of 160 mg/kg per 24 h for 3 days; n = 5). Population pharmacokinetics was determined, and concentrations in cavity fluids were measured at steady state (72 h). Highest measured serum drug concentration in the bolus group was 88.09 μg/mL and minimum drug concentration (C_min) was 0.78 μg/mL at 6‐h postadministration (immediately before each next dose), whereas infusion resulted in a steady‐state concentration of 16.10 μg/mL in the infusion group. Mean cefotaxime concentration in joint fluid at 72 h was higher (P = 0.051) in the infusion group (5.02 μg/mL) compared to the bolus group (0.78 μg/mL). Drug concentration in CSF at 72 h was not different between groups (P = 0.243) and was substantially lower than serum concentrations in either group. Insufficient data on pulmonary epithelial lining fluid were available to compare the methods of administration for cefotaxime in this cavity fluid. Results support continuous drug infusion over bolus dosing in the treatment for neonatal foal septicemia to optimize time that cefotaxime concentration exceeds the minimum inhibitory concentration of common equine pathogens.  相似文献   

Interactions between rodents and weeds in a lowland rice agro‐ecosystem: the need for an integrated approach to management     

Nyo Me HTWE  Grant R. SINGLETON  David E. JOHNSON 《Integrative zoology》2019,14(4):396-409

Rodents and weeds are important pests to rice crops in Southeast Asia. The interaction between these 2 major pests is poorly documented. In temperate cereal systems, seeds of grass weeds can be an important food source for rodents and weed cover along crop margins provides important refuge for rodents. In 2012 and 2013, a replicated study (n = 4) in Bago, Myanmar compared 4 treatments (rodents and weeds; no rodents and weeds; rodents and no weeds; no rodents and no weeds) each of 0.25 ha in transplanted rice. Weeds were managed with hand weeding in the wet season, and hand weeding and herbicides in the dry season. Plastic fences were installed to exclude rodents. We examined the weed cover and relative abundance of weed species, rodent damage, rodent population dynamics and rice yield loss caused by rodents and weeds. The dominant rodent species was Bandicota bengalensis. In the dry season, Cyperus difformis was dominant at the tillering stage and Echinochloa crus‐galli was the dominant weed species at the booting stage. In the wet season E. crus‐galli was a dominant weed throughout the season. Damage by rodents was higher in the dry season. There were larger economic benefits for best weed management and effective rodent control in the dry season (258 US$/ha) than in the wet season (30 US$/ha). Concurrent control of weeds in and around rice fields combined with coordinated community trapping of rodents during the early tillering stage and ripening stage of rice are recommended management options.  相似文献