Balancing genetic diversity, genetic merit and population viability in conservation programmes     

N. Piyasatian  B. P. Kinghorn 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2003,120(3):137-149

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Effect of Antiserum and Prolonged Cultivation on the Agglutinative Characteristics of a Type I Meningococcus     

Naiman DN 《Science (New York, N.Y.)》1948,108(2804):334-335

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Inhibition of gastric ulceration in the rat by o-hydroxybenzoic (salicylic) acid     

PAULS F  WICK AN  MACKAY EM 《Science (New York, N.Y.)》1948,107(2766):19-20

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Na/K-ATPase activity during larval development in the giant freshwater prawn Macrobrachium rosenbergii and the effects of salinity on survival rates     

Do Thi  Thanh HUONG  Vidya  JAYASANKAR  Safiah  JASMANI  Hisako  SAIDO-SAKANAKA  Andrew J.  WIGGINTON  Marcy N.  WILDER 《Fisheries Science》2004,70(3):518-520

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Characterization of ovine PrP gene promoter activity in N2a neuroblastoma and ovine foetal brain cell lines   总被引：1，自引：0，他引：1  

G. T. O'Neill  K. Donnelly  E. Marshall  D. Cairns  W. Goldmann  N. Hunter 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2003,120(2):114-123

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Science at Cornell     

N H 《Science (New York, N.Y.)》1886,7(167):352

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Muscarinic receptor subtypes in equine tracheal smooth muscle     

M. Yu  N. E. Robinson  Z. Wang  F. J. Derksen 《Veterinary research communications》1992,16(4):301-310

Selective muscarinic receptor antagonists were used to identify muscarinic receptor subtypes in equine trachealis strips. The M₁ receptor antagonist pirenzepine (10^–7 mol/L to 3 × 10^–5 mol/L) and the M₃ receptor antagonist 4-diphenylacetoxy-N-methylpiperidine (4-DAMP, 10^–9 mol/L to 3 × 10^–7 mol/L³) dose dependently inhibited the contractile responses to electrical field stimulation (EFS) and exogenous acetylcholine (ACh). Schild plots yielded a pA₂ value for pirenzepine vs ACh of 6.75 ± 0.09, which is consistent with the affinity for M₂ or M₃ receptors, and a pA₂ value for 4-DAMP vs ACh of 8.47 ± 0.09, which is in agreement with the affinity for M₃ receptors. The M₂ receptor antagonist gallamine (10^–5 mol/L and 10^–4 mol/L) did not affect the response of trachealis to exogenous ACh and low-frequency EFS (0.1–2 Hz) but decreased the responses to high-frequency EFS (4–16 Hz). These results suggest that the muscarinic receptors mediating contractions induced by ACh in equine tracheal smooth muscle are of the M₃ subtype. The lack of an increase in the response to EFS following gallamine suggests that functional prejunctional inhibitory M₂ receptors are not present on the cholinergic nerves innervating equine tracheal smooth muscle.  相似文献   

FREEZING BOAR SEMEN IN FLAT PLASTIC BAGS MEMBRANE INTEGRITY and FERTILITY     

H. Rodriguez-Martinez  B. Eriksson  N. Lundeheim 《Reproduction in domestic animals》1995,31(1):161-168

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Effect of age on absorption and immune responses to weaning or introduction of novel dietary antigens in pigs   总被引：14，自引：0，他引：14  

A D Wilson  C R Stokes  F J Bourne 《Research in veterinary science》1989,46(2):180-186

Pigs weaned at three weeks old absorb food protein antigens from the intestine. The amount of antigen absorbed declines over the next three weeks, and this decline is associated with an increasing level of serum antibody to the fed proteins. There was no difference in the rate of immune elimination of intravenously injected antigen in fed and unfed controls. The reduction of serum antigen is thus likely to reflect reduced absorption, possibly mediated by locally produced antibody. Pigs weaned at 10 weeks old also absorbed antigens and produced an antibody response when introduced to soya; and after three weeks of feeding soya the absorption of antigen was substantially reduced. This latter exclusion was specific for soya as a second novel protein (ovalbumin) was absorbed when introduced to the diet at this time. At six months, pigs no longer absorbed soya proteins when they were introduced to the diet. Furthermore, pigs of this age had serum 'antibody' to soya and other proteins such as keyhole limpet haemocyanin to which they had never been exposed.  相似文献   

Biovailability of ivermectin administered orally to dogs     

C. P. Daurio  E. N. Cheung  A. R. Jeffcoat  B. J. Skelly 《Veterinary research communications》1992,16(2):125-130

The bioavailability of three formulations of ivermectin was determined following oral administration to dogs. The average peak plasma level (C _max) of ivermectin administered in the standard tablet formulation at 6 and 100 µg/kg of body weight was 2.97 and 44.31 ng/g, respectively. This suggest dose-dependent pharmacokinetics.C _max and total ivermectin bioavailability, as assessed from the area under the plasma curve (AUC), were similar between two tablet formulations of ivermectin administered at 100 µg/kg. Furthermore,C _max was similar following administration of radiolabelled ivermectin at 6 µg/kg in either a beef-based chewable formulation or in the standard tablet formulation.  相似文献