Pharmacokinetics of gentamicin in rabbits   总被引：1，自引：0，他引：1  

L. OGDEN  R.C. WILSON†  C.H. CLARK†  E.D COLBY† 《Journal of veterinary pharmacology and therapeutics》1995,18(2):156-159

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Microsporidian encephalitis of farmed Atlantic salmon (Salmo salar) in British Columbia.          下载免费PDF全文

J R Brocklebank  D J Speare    M L Kent 《The Canadian veterinary journal. La revue veterinaire canadienne》1995,36(10):631-633

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Dietary protein for young grazing sheep: Interactions with gastrointestinal parasitism   总被引：1，自引：0，他引：1  

M. F. J. van Houtert  I. A. Barger  J. W. Steel 《Veterinary parasitology》1995,60(3-4):283-295

Effects of protein supplementation and of nematode control on production responses in young grazing sheep and on nematode population dynamics were assessed. Young Merino wether sheep (n = 270) were allocated to one of three supplementation (Su) treatments and one of three regimes of nematode control (drench, Dr) in a factorial design. Each of the nine treatments was replicated three times in a randomised complete block. Animals received no supplement (SuO) or were given supplements at a level equivalent to 200 g day⁻¹, fed three times a week. The supplements contained 25% lucerne meal with either 75% sunflower meal (Su1) or 75% formaldehyde-treated sunflower meal (Su2). Nematode control regimes were: not drenched unless survival of individual animals was threatened (DrO); drenched according to a strategic drenching programme (Dr1); treatment with a controlled-release albendazole capsule (Dr2). Infections with Haemonchus contortus were suppressed by use of closantel. Due to drought conditions and lack of pasture growth, lucerne hay was fed to all sheep from Week 14 onwards (350 g per head per day, fed twice a week). Supplementation reduced the need for ‘survival drenching’ in Dr0 sheep considerably. Live-weight gain was increased significantly by supplementation with Su1 or Su2 during the 36-week experiment. Undrenched animals given Su1 or Su2 tended to grow faster than unsupplemented animals in the Dr1 and Dr2 groups. Greasy wool production and fibre diameter were increased by supplementation and anthelmintic treatment. Faecal worm egg counts (FEC) in undrenched sheep were significantly lower for Su1 and Su2 sheep than for Su0 sheep. There were no effects of supplementation on FEC in Dr1 or Dr2 sheep. Worm burden was generally unaffected by supplementation, while the drenching treatments Dr1 and Dr2 reduced worm burden at Week 16 and to a lesser extent at Week 27. Trichostrongylus colubriformis was the predominant nematode species, with smaller numbers of Nematodirus spp., Trichostrongylus vitrinus, Trichostrongylus axei and Ostertagia circumcincta also present. It was concluded that supplementary feeding with protein meal substantially reduced production losses attributable to nematode infections in young grazing sheep. This appears to be due to an enhanced resilience of the host, rather than any major changes in development of protective immunity.  相似文献   

An encrusted cystitis caused by Corynebacterium urealyticum in a dog     

A. GOMEZ  C. NOMBELA  J. ZAPARDIEL  F. SORIANO 《Australian veterinary journal》1995,72(2):72-73

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Salinity Tolerance of Rice (Oryza sativa L.) with Reference to Endogenous and Exogenous Abscisic Acid     

J. S. BOHRA  H. DÖRFFLING  K. DÖRFFLING 《Journal of Agronomy and Crop Science》1995,174(2):79-86

Experiments conducted m a phytotron on three rice varieties of different salinity tolerance revealed an increase in the content of endogenous abscisic acid (ABA) with increasing NaCl salinity in IR20 (semi salt-tolerant), but in Pokkali (salt-tolerant) and IR28 (salt-sensitive) the increase in ABA content was marginal. Under sahnity stress, in general, 5 weekly sprayings of ABA (10^-4 mol L^-1) decreased Na and K concentrations in the shoot to the extent of 29.5 % and 3.3 %, respectively. However, ABA application significantly improved the K/Na ratio as well as the chlorophyll fluorescence decrease ratio (Rfd, indicator for potential photosynthetic activity), the number of green leaves per plant and the shoot dry weight. The response of IR20 and IR28 to ABA application was significantly better than that of Pokkali. Increasing salinity caused marked nutrient imbalances, decreased Rfd values and shoot dry weight. The results are discussed in relation to possible mechanism of salinity tolerance.  相似文献   

Mathematical psychology: response times     

Falmagne JC 《Science (New York, N.Y.)》1987,237(4818):1060

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Transforming genes: oncogenes, genes, and growth factors     

Ihle JN 《Science (New York, N.Y.)》1987,237(4818):1060-1061

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Hopes and Fears at NSF     

W J 《Science (New York, N.Y.)》1987,237(4818):970

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Electromagnetic stabilization of weakly conducting fluids     

Ivory CF  Gobie WA  Beckwith JB  Hergenrother R  Malec M 《Science (New York, N.Y.)》1987,238(4823):58-61

Classical hydromagnetic theory predicts that the flow of dilute aqueous electrolyte in a slit can be stabilized by application of a strong, transverse magnetic field. However, recent experiments indicate that stabilization can be achieved with the use of a much weaker field in the presence of a small lateral current. A revised theory describes how the magnetic and electric fields interact to eliminate natural convection.  相似文献   

Morrison Makes TV Debut     

H C 《Science (New York, N.Y.)》1987,238(4823):23

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