摘要:

The prevalence of antibodies to various viruses was investigated in a series of serum samples collected from horses in the Netherlands between 1963 and 1966 and from 1972 onwards. Neutralizing antibodies to equine rhinopneumonitis virus, equine arteritis virus and to equine rhinovirus types 1 and 2 were detected in respectively 76%, 14%, 66% and 59% of the equine serum samples tested.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693724

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The character, extent, and localization of perilobular fibrosis were studied in cattle experimentally infected with Fasciola hepatica. Such fibrosis is indirectly due to the liver flukes.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693725

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

In a trial involving 542 dairy cattle on 28 farms, 276 were treated once with thiabendazole within two days of calving. The treated group showed an average increase in milk yielded over the non‐return group of 229.8 kg during the subsequent lactation.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693726

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The comparative study reported in the present paper was undertaken to collect data on the collagen content and collagen quality of tendons showing high (low) tensile strength levels and a compact (loose) histological structure. It was shown that tendon tissues of these two groups do not differ in this regard. The effect of administering a number of nutrients (known to be essential in collagenesis) was tested during this study. Administration of these nutrients did not prevent synovitis and did not increase tensile strength.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693727

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Since the macroscopical and microscopical examination of bull semen does not in all cases appear to give conclusive indications concerning the fertilizing capacity, an investigation of some biochemical parameters was undertaken. It was shown that the following biochemical examination could furnish some more information about the quality of the semen:1.Determination of the phenylalanine‐ α‐ketoglutarate transaminase activity both in the seminal plasma and in the whole semen. A high transaminase activity in the plasma points to leakage out of the spermatozoa, thus indicating an affection of the spermatozoa. In that case larger amounts of basic amino acids and of leucine were often found in the seminal plasma than would normally be observed.2.Gas chromatographic examination of the steroids occurring both in the seminal plasma and in the spermatozoa. In a number of infertile bulls small peaks of progesterone were found together with those of other, unidentified compounds.3.Investigation of the carbohydrate metabolism in the semen. In a number of fertile bulls the following deviations were found:a.the presence of quite a lot of fructose in the spermatozoa;b.the presence of glucuronic acid and / of other foreign compounds in the spermatozoa or in the plasma;c.an elevated pH in the seminal plasma some 2 to 3 hours after ejaculation;d.a low phenylalanine‐α ‐ketoglutarate transaminase activity in the whole semen (the spermatozoa had been disrupted by freezing).4.Investigation of the presence of reducing aldehydes (glycolaldehyde and glyceraldehyde) inside the spermatozoa.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693728

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Gilts and sows kept under unphysiological commercial conditions may show delayed puberty, delayed estrus postweaning and delayed returns after insemination. It is postulated that in all three manifestations gonadotropic insufficiency is the causative factor, produced by inadequate exteroceptive stimulation, mainly of olfactory origin, or by a configuration of stimuli which is experienced as in‐appropriate by the individual organism. Pituitary L.H. is necessary to induce tertiary follicles to secrete estrogens, which play a prominent part in estrus expression and in turn evoke the pre‐ovulatory L.H. peak flow. Pituitary L.H. also appears to be necessary for persistence of the corpora lutea during early pregnancy and this L.H. release may also be inhibited under inadequate physiological conditions. Therefore anaphrodisia in big commercial piggeries can be a normal physiologic reaction of the animal and more or less an adaptation to these unfavourable circumstances.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693729

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

The clinical findings following the instillation of an aqueous solution containing natamycin, neomycin and hydrocortisone into the ears of dogs exhibiting the signs of otitis externa are described.

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693730

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Developments in Biological Standardization ‐ Standardization of Rabies Vaccines for Human Use Produced in Tissue Culture (Rabies III).Published by S. Karger, Basle; 292 pages, Vol. 40, Marburg 1977

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693731

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

ISSN:0165-2176    

DOI:10.1080/01652176.1979.9693723

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor