The degradation of simazine, linuron and propyzamide in different soils     

A. WALKER  JULIE A. THOMPSON 《Weed Research》1977,17(6):399-405

Simazine, linuron and propyzamide were incubated in 18 different soils at 25°C and field capacity soil moisture content. The degradation of each herbicide followed first-order kinetics. The half-life of simazine varied from 20 to 44 days, that of linuron from 22 to 86 days and that of propyzamide from 10 to 32 days. The rate of linuron degradation was highly significantly correlated with soil organic matter content, clay content, soil respiration and the extent of herbicide adsorption by the soil. The rate of simazine degradation was significantly and negatively correlated with soil pH, but the rate of propyzamide degradation was not related with any of the soil factors examined.  相似文献   

Efficacy of ivermectin jetting fluid for the curative treatment of blowfly strikes in sheep     

DR THOMPSON  D. RUGG  PG SCOTT  LG CRAMER†  RA BARRICK† 《Australian veterinary journal》1994,71(2):42-43

SUMMARY A jetting fluid containing 7.5% w/v ivermectin, which was diluted to 0.03 mg/mL in water and applied using a standard hand jetting technique, was assessed for its efficacy in treating blowfly strikes on Merino sheep. Strikes were induced on sheep held under insectary conditions using laboratory-reared Lucilia cuprina. All struck sheep jetted at 28,48 or 72 hours after exposure to flies were successfully treated. All 1st, 2nd and early 3rd instar larvae were killed within 24 hours of treatment.  相似文献   

Virus and virus-like particles in the faeces of cats with and without diarrhoea   总被引：2，自引：0，他引：2  

J. A. MARSHALL  M. L. KENNETT  S. M. RODGER  M. J. STUDDERT†  W. L. THOMPSON  I. D. GUST 《Australian veterinary journal》1987,64(4):100-105

Negative staining electron microscopy was used to identify viruses in 166 normal and 62 diarrhoeal faecal samples from 208 cats admitted to an animal shelter during a 16-month period (March 1984 to June 1985). On the basis of size and shape 7 distinct viral types were detected: 24 nm parvovirus-like particles, 30 nm astrovirus, 30 nm picornavirus-like particles, reovirus, rotavirus, coronavirus and a 75 nm "togavirus-like" particle. The incidence of these particles in the 208 cats was 11%, 7%, 6%, 0.4%, 5%, 1% and 1% respectively. Virus isolation studies using 40 of the faecal samples succeeded in isolating reovirus 1 in 2 cases. Immune electron microscope studies demonstrated the presence of antibody in a human serum to cat astrovirus, but failed to clarify the identity of the parvovirus-like particles and picornavirus-like particles, other than showing that some of the parvovirus-like particles were not related to feline panleukopenia virus. It was found that parvovirus-like particles, astrovirus, picornavirus-like particles, reovirus and rotavirus could be excreted by cats with normal faeces as well as cats with diarrhoeal faeces. Parvovirus-like particles, astrovirus, picornavirus-like particles and rotavirus could be excreted in high concentration in normal faeces. There was no simple relationship between age and diarrhoea in the population of cats studied. Age was not a critical factor in the excretion of parvovirus-like particles, astrovirus, picornavirus-like particles and rotavirus. The incidence of diarrhoea was not clearly associated with the seasons.  相似文献   

Efficacy of ivermectin in a controlled-release capsule for the control of breech strike in sheep     

D. RUGG  D. THOMPSON  RP GOGOLEWSKI  GR ALLERTON  RA BARRICK  JS EAGLESON 《Australian veterinary journal》1998,76(5):350-354

Objective To investigate the efficacy of ivermectin in an intraruminal controlled-release capsule (CRC) against blowfly strike.
Design Pen and field trials with controls.
Animals Pen studies: Two breech strike trials involving 60 Romney and 60 Merino sheep. One body strike trial using 100 Merino sheep.
Field trials: Eight trials in New Zealand used 1000 Romney and Romney-cross sheep. Fifty Merino lambs in one trial in Australia.
Procedure Pen studies: Sheep were allocated to two equal groups. One was not treated, the other sheep received a CRC that delivered ivermectin at 20 μg/kg/day for 100 days. In the breech strike trials, each animal was given an oral laxative 2 days before exposure to adult Lucilia cuprina . In the body-strike trial, the sheep sheep were kept wet to increase susceptibility prior to the release of blowflies.
Field trials: Fifty or 200 sheep allocated to equal groups of nontreated or treated with the CRC and grazed at pasture exposed to natural blowfly challenge.
Results Pen studies: Breech strikes developed in 24 of 60 controls but in none of 60 CRC-treated sheep. There was a 35% reduction in the number of CRC-treated sheep struck on the body.
Field trials: The average number of breech strikes in CRC-treated sheep was reduced by 86% (P < 0.001). The number of body strikes in the treated groups was a reduced by 27% (P < 0.05).
Conclusion The ivermectin CRC is a useful aid in controlling breech strike, but provides only moderate reduction in the incidence of body strike.  相似文献   

Association of calicivirus infection with chronic gingivitis and pharyngitis in cats   总被引：2，自引：0，他引：2  

R. R. THOMPSON  G. E. WILCOX  W. T. CLARK  K. L. JANSEN 《The Journal of small animal practice》1984,25(4):207-210

Feline calicivirus was isolated from eight often cats with chronic stomatitis but not from 10 healthy cats kept under similar conditions. Tests for feline leukaemia viral antigen failed to detect evidence of this infection. The age of affected cats ranged from 1.5 to 11 years with a mean of 5.7 years. Treatment with corticosteroids, megestrol acetate and tooth extraction resulted in clinical improvement but in some cases the condition recurred when treatment was finished.  相似文献   

Comparison of Multistage Versus One-Stage Destabilization of a Type II External Fixator Used to Stabilize an Oblique Tibial Osteotomy in Dogs     

Jerome Auger  DMV  DES  MSc  Diplomate ACVS/ECVS    Jacques Dupuis  DMV  MS  Diplomate ACVS    Francis Boudreault  BEng  MSc    Philippe Pare  BEng    Guy Beauregard  DMV    Luc Breton  DMV  MSc 《Veterinary surgery : VS》2002,31(1):10-22

OBJECTIVE: To compare the biomechanical effects of multistage versus one-stage destabilization of a type II external skeletal fixator (ESF) used to stabilize an oblique unstable tibial osteotomy in dogs. STUDY DESIGN: In vitro, in vivo, and ex vivo experimental study. ANIMAL POPULATION: Twelve healthy adult dogs. METHODS: The biomechanical characteristics of the type II ESF used in this study were determined. This fixator was applied to both tibiae of two groups of 6 dogs to stabilize a 2-mm-wide oblique osteotomy. One fixator on each dog remained unchanged throughout the 11-week study (control group). The fixator on the opposite limb was destabilized late and acutely in one group of dogs (single-stage) and early and progressively in the other (multistage). Clinical examination, radiographic examination, and force-plate analysis were used to evaluate the results. All dogs were euthanatized at 11 weeks. All tibiae were scanned to determine the cross-sectional area of the callus in the center of the osteotomy and subjected to biomechanical tests to determine mean pull-out strength of pins and callus strength and stiffness. RESULTS: Stiffness of the type II ESF used in this study was 578 N/mm in axial compression, 0.767 Nm/deg in torsion, 261 N/mm in medio-lateral bending, and 25 N/mm in cranio-caudal bending. Peak vertical forces of the hindlimbs were significantly lower at 2.5 and 5 weeks than before surgery. Peak vertical forces of the hindlimbs did not change before and after destabilization. No significant differences could be detected between the two destabilization sequences or between all control tibiae and pooled destabilized tibiae with regards to radiographic evaluation of the healing osteotomy, cross-sectional periosteal callus area, mean pull-out strength of transfixation pins, callus strength, and callus stiffness. CONCLUSIONS AND CLINICAL RELEVANCE: Bone healing of unstable osteotomies stabilized with a type II ESF is not significantly enhanced by staged destabilization of the fixation as performed in this study.  相似文献   

Colonylike structures in the propagation of strains of the agents of chronic respiratory disease and turkey sinusitis in vitro     

SULLIVAN JF  THOMPSON CH  FOSTER NH 《The Cornell veterinarian》1955,45(2):248-253

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Transient memory in albino rats     

THOMPSON R 《Science (New York, N.Y.)》1959,129(3352):842-843

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Differential thermograms of polysaccharides     

CHESTERS G  THOMPSON SO 《Science (New York, N.Y.)》1961,133(3448):275-276

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Effect of phosphorylated hesperidin and other flavonoids on fertility in mice     

THOMPSON RQ  STURTEVANT M  BIRD OD 《Science (New York, N.Y.)》1953,118(3074):657

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