Oesophagogastric parakeratosis in the growing pig: effects of the physical form of barley-based diets and added fibre   总被引：1，自引：0，他引：1  

Z V Potkins  T L Lawrence  J R Thomlinson 《Research in veterinary science》1989,47(1):60-67

In four experiments a total of 288 individually fed pigs were given barley-based diets for about 100 days from about 20 kg liveweight. Fine grinding of barley increased the number and severity of oesophagogastric lesions. Pelleting a diet based on coarsely ground barley had a similar effect. Coarser grinding of the barley and substituting small proportions of oat husk, but not of bran, gave lower incidences and severities of lesions. The performance responses of the pigs differed and give a framework for deciding on the balance to be struck between optimal performance and the risk of lesion development.  相似文献   

Book review     

A. C. Rowlands 《Veterinary research communications》1989,13(2):171-171

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Ocular pathology of caprine beta-mannosidosis     

J A Render  K L Lovell  M Z Jones  C A Wheeler 《Veterinary pathology》1989,26(5):444-446

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Clinical anatomy of the equine foot     

R A Kainer 《Veterinary Clinics of North America: Equine Practice》1989,5(1):1-27

A review of investigations of the functional anatomy of the equine foot is presented. Emphasis is placed on the relationships of structures involved in the major diseases of the foot.  相似文献   

硝酸还原酶与氮素利用的关系及其在作物遗传育种中的应用(综述)     

孙宝启  李玉京 《中国农业大学学报》1993,(3):29-34

本文综述了硝酸还原酶与氮素利用的关系及其遗传特性和在作物育种中应用的某些最新进展。氮吸收、利用等性状的生理和遗传特性极其复杂,受环境影响很大,对其进行遗传改良需考虑多种指标。对硝酸还原酶活性(NRA)与品质性状和产量的关系的争论很多,有些研究表明 NRA 可作为品质、产量性状的选择指标,有些则相反。逆境条件下 NRA 的变化非常敏感,NRA 可能与抗逆性有关。  相似文献   

Protein and energy relationships in dairy cattle. 1. Dry cows     

E Teller  J M Godeau 《Archives of Animal Nutrition》1989,39(6):535-542

Nitrogen metabolism in ruminants is a dynamic process depending on level of intake and composition of dietary dry matter and on the physiological state of the animals. These parameters were analysed in a regression model for the requirements of nitrogen absorbed in the small intestine in relation to nitrogen balance of dry cows fed at maintenance level. The amount of total dietary nitrogen and the apparent nitrogen digestibility vary notably according to energy intake and energy concentration in dietary dry matter. On the contrary, the amount of nitrogen absorbed in the small intestine is only slightly affected by these parameters. The discrepancy between these statements lies mainly in differences in intestinal nitrogen absorption and in altered fermentation processes of the large intestine in response to changes in energy supply and ME concentration in dietary dry matter.  相似文献   

Insertion of a transtympanic ventilation tube for the treatment of otitis media with effusion     

C. L. Cox  R. W. T. Slack  G. J. Cox† 《The Journal of small animal practice》1989,30(9):517-519

In this paper, a case of otitis media with effusion (‘glue ear’) is described in a Cavalier King Charles spaniel. Its presentation, diagnosis and surgical management by the insertion of a trans-tympanic ventilation tube (grommet) is discussed.  相似文献   

Chronic renal failure associated with bilateral nephroliths and ureteroliths in a two-year-old Thoroughbred colt   总被引：1，自引：0，他引：1  

W D Hope  J H Wilson  D A Hager  M R Garry  M B Calderwood-Mays 《Equine veterinary journal》1989,21(3):228-231

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Genetics of Body Color in Tilapia mossambica     

Douglas  Tave  Mahmoud  Rezk  R. Oneal  Smitherman 《Journal of the World Aquaculture Society》1989,20(4):214-222

Gold, bronze, and black (normal pigmentation) body colors in Tilapia mossambica are controlled by a single autosomal gene with incomplete dominant gene action: GG fish are black gg fish are gold; Gg fish are bronze. Because gold body color is produced by the recessive genotype, it is easy to produce and to maintain a truebreeding population of gold T. mossambica for commercial purposes. If all other colors are culled, the population will breed true, because gold × gold will always produce 100% gold offspring. The G gene will be a valuable genetic marker for many genetic studies, such as the production of gynogenetic T. mossambica .  相似文献   

Cellular injury and lipid peroxidation induced by hexavalent chromium in isolated rat hepatocytes   总被引：1，自引：0，他引：1  

S Ueno  N Susa  Y Furukawa  K Aikawa  I Itagaki 《Nippon juigaku zasshi. The Japanese journal of veterinary science》1989,51(1):137-145

In order to elucidate the relationship between cellular injury and lipid peroxidation induced by hexavalent chromium (CrVI), isolated rat hepatocytes treated with any one of scavengers of active oxygen species, antioxidants or antichromium agent were incubated with K2Cr2O7 as CrVI (1 mM Cr). After the incubation, the development of lipid peroxidation was determined as thiobarbituric acid (TBA)-reacting materials in total lipid extracts from the incubated hepatocytes. Cellular injury was observed as a leakage of lactate dehydrogenase (LDH) from hepatocytes into incubation medium. The contents of reduced glutathione (GSH) in hepatocytes were also assessed. Results obtained were as follows: (1) CrVI facilitated lipid peroxidation in isolated hepatocytes after 20 min of incubation. On the other hand, the cellular injury induced by CrVI was barely observed even after 60 min of incubation. (2) The CrVI-induced lipid peroxidation was inhibited by catalase and mannitol as scavengers of active oxygen species, or N,N'-diphenyl-p-phenylenediamine and alpha-tocopherol as antioxidants. However the cytotoxicity of CrVI could not be prevented by these chemicals. (3) CrVI depleted the contents of intracellular GSH and diminished the activities of glutathione reductase (GR) and glutathione-S-transferase (GST) except glutathione peroxidase. (4) The scavengers of active oxygen species and the antioxidants could not prevent the depletion of intracellular GSH induced by CrVI. (6) Ascorbic acid, antichromium agent, prevented all of the lipid peroxidation, the cellular injury and intracellular GSH depletion induced by CrVI.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献