Effects of fenbendazole administration on hematology, clinical chemistries and selected hormones in the white Pekin duck     

W. M. PEDERSOLI  J. S. SPANO  L. M. KRISTA.†  J. F. WHITESIDES.†  W. R. RAVISH‡  R.J. KEMPPAINEN  D. W. YOUNG 《Journal of veterinary pharmacology and therapeutics》1989,12(2):200-208

The effects of single i.v. and p.o. doses (5 mg/kg) of fenbendazole, were evaluated on thyroxine, tri-iodothyronine, corticosterone, hematology, clinical chemistries, and serum proteins in 10 white Pekin ducks. Fenbendazole was administered i.v. (n = 5) as a 3% dimethyl sulfoxide solution and p.o. (n = 5) as a 10% commercial suspension. Serum enzyme concentrations, total protein and protein fractions, glucose, cholesterol, uric acid, sodium, and potassium were unchanged from baseline values. Serum triglycerides decreased consistently in the i.v.-treated group but remained unchanged in the p.o.-treated group. Serum chloride was consistently elevated above baseline values for both i.v.- and p.o.-treated ducks, while inorganic phosphate was consistently decreased only in the i.v.-treated group. Hemoglobin and hematocrit values generally were below baseline values. Leukocyte values varied considerably and were not significantly different from baseline values. Serum thyroxine and tri-iodothyronine values in both the i.v.- and p.o.-treated groups were not changed significantly from baseline values. Serum corticosterone values were not changed in the i.v.-treated groups but they were decreased at various times in the p.o.-treated group. Although there were some sporadic significant changes in the parameters measured versus baseline values all values remained within the physiologic limits for ducks. The safety of fenbendazole has been previously demonstrated for several species.  相似文献   

Studies on the chemical control of blackgrass (Alopecurus myosuroides Huds.) in winter wheat in the West Midlands     

L. R. K. SCOUREY  I. YOUNG  J. B. PAGE 《Weed Research》1982,22(1):23-26

In trials carried out in 1978–80, blackgrass populations in winter wheat growing on heavy soil were substantially reduced by all chemical treatments tested, the least effective being methabenzthiazuron. Wild oat populations were also reduced by all treatments except chlofop-isobutyl and methabenzthiazuron. On average of the 3 years only metoxuron treatment gave wheat yields significantly higher than the unsprayed crop.  相似文献   

Baby pig disease     

YOUNG GA 《Journal of the American Veterinary Medical Association》1948,112(851):121-123

  相似文献   

Evaluating Agricultural Programs     

HAROLD C. YOUNG  R. H. GIBSON 《Growth and change》1971,2(3):42-46

  相似文献   

BSE: lessons for Australia     

PL YOUNG 《Australian veterinary journal》1996,74(2):126-127

  相似文献   

The solid solution equilibria of lead and cadmium in polluted soils     

M. JOPONY  S.D. YOUNG 《European Journal of Soil Science》1994,45(1):59-70

A method for the measurement of Pb and Cd in equilibrium soil solutions involving soil equilibration with a dilute Ca electrolyte, centrifugation and filtration to <0.2 μm was evaluated. The procedure was subsequently used for the analysis of 100 Pb- and 30 Cd-contaminated soils. Solutions were analysed for Pb- and Cd using graphite-furnace AAS and the concentrations of Pb²⁺ and Cd²⁺ were estimated using standard speciation calculations. The concentrations of Pb and Cd found in the soil solutions were in the range 3.5–3600 μg dmp ^?3 and 2.7–1278 μg dm ^?3 respectively; both ranges represented less than 0.1% of the total metal concentration in the soils. Depending on solution pH, Pb ⁺² accounted for between 42–78% of Pb in solution while about 65% of Cd in solution was present as Cd⁺². The concentrations of Pb²⁺ and Cd²⁺ in solution suggested that the soil solutions were undersaturated with respect to the solid phases PbC0₃ and CdC0₃ but supersaturated with respect to Pb₅(P0₄)₃Cl and, for some samples, Cd₃(P0₄)₂ respectively. However, for both metals, a good empirical relationship was obtained between the total metal concentration in soil (mol kg^?1), free metal concentration in solution (mol dm^?3) and solution pH. The relationships took the general form of a pH-dependent Freundlich adsorption equation: For both lead and cadmium relationships, the values ofn and K₁ were close to unity, so that the distribution coefficient could be estimated from pH and a single metal-dependent constant, K₂. The algorithms appeared to be valid over a metal concentration range of four logarithmic units and pH range of 3.5–7.5.  相似文献   

Canadian researches on BAL (British anti-lewisite)     

YOUNG L 《Science (New York, N.Y.)》1946,103(2676):439-440

  相似文献   

IMAGING DIAGNOSIS—SYNOVIAL MYXOMA OF LUMBAR VERTEBRAE ARTICULAR PROCESS JOINT     

WAKA H. BLAIR  JONATHAN M. LEVINE  SHARON C. KERWIN  KATHY A. SPAULDING  BENJAMIN D. YOUNG  ROY R. POOL 《Veterinary radiology & ultrasound》2011,52(3):309-312

Magnetic resonance (MR) imaging and histopathology were used to diagnose an articular process synovial myxoma in a dog. On MR images, the tumor was characterized by distortion of the left L1–L2 articular process, widening of the articular process joint, and the presence of a mass contiguous with the synovium of the articular process that displaced the spinal cord. The tumor was T2‐hyperintense, T1‐hypointense, relative to muscle, and had mild contrast enhancement. The MR features of articular process synovial myxoma may be distinct from other diseases of the articular process joint.  相似文献   

The effects of soil structure on protozoa in a clay-loam soil   总被引：2，自引：0，他引：2  

R.S. GRIFFITHS  I.M. YOUNG 《European Journal of Soil Science》1994,45(3):285-292

Physical disruption of a clay-loam soil by slaking, grinding and compaction was used to determine the specific effects of soil structure on soil protozoa. Individual air-dry aggregates (1–2 cm diameter) were wetted slowly, or had their structure disrupted by slaking or grinding. They were then moistened with nutrient solution and incubated, at a matric potential of ?10 kPa. The nutrient solution had to supply at least 400 μg C g^?1 dry soil before protozoan populations increased measurably. Numbers of ciliate protozoa were enhanced by grinding, regardless of the amount of nutrient added. The moisture content and, therefore, the final nutrient concentration of the disrupted aggregates, changed markedly and could account for the observed increase in protozoan biomass from slowly wet to slaked to ground aggregates. There were no differences in protozoan biomass when the applied nutrient concentration was adjusted so that all treatments contained the same amount of nutrient. Soil cores were prepared from sieved (2–4 mm diameter), ground and ground/compacted soil. Thin sections revealed that the pore space accessible to protozoa decreased in these three treatments from 24% to 13% to 9%, respectively. Protozoan biomass was unaffected by grinding but showed a greater than 30-fold decrease following compaction that could not be accounted for solely by the reduced pore space. Grinding and compacting could have favoured anaerobic conditions in the core which would have reduced protozoan activity. Soil structure had no measurable direct effect on protozoan populations, but it had a much greater indirect effect through its influence on moisture content and aeration status.  相似文献   

Humic acid–proton equilibria: A comparison of two models and assessment of titration error     

S.J. MARSHALL  S.D. YOUNG  K. GREGSON 《European Journal of Soil Science》1995,46(3):471-480

  相似文献