Rostral displacement of the palatopharyngeal arch in a seven-month-old Hanoverian colt     

H J Klein  E Deegen  N Stockhofe  H Wissdorf 《Equine veterinary journal》1989,21(5):382-383

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Histamine inhalation provocation test: method to identify nonspecific airway reactivity in equids   总被引：1，自引：0，他引：1  

H J Klein  E Deegen 《American journal of veterinary research》1986,47(8):1796-1800

After inhalation of increased concentrations of histamine solutions, equids had a decrease in dynamic compliance (Cdyn) and an increase in airway resistance, work of breathing, and maximum intrathoracic differences in pressure. Because the change in Cdyn correlated best with the inhaled histamine concentrations, airway reactivity was assessed by the decrease in Cdyn. With the use of linear regression, histamine concentrations were calculated; this resulted in a 35% reduction of Cdyn and these concentrations were defined as 35% provoking concentration Cdyn. The histamine inhalation provocation test was carried out in 40 equids. Nonspecific airway hyperreactivity was not present in equids that did not have clinical signs of respiratory tract disease, but it was present in 25% of the equids with low-grade lung disease and in all equids with severe lung disease.  相似文献   

Korrosionsanatomische Untersuchungen am Blutgefäßsystem des Encephalon und der Meninges bei Felis domestica     

Thomas  Klein 《Anatomia, histologia, embryologia》1980,9(3):236-279

The blood vessels of the brain and brain cavity were studied in 24 cats with the aid of corrosion-anatomical methods and coloured gelatine-injections. The findings are compared with those of others, and described for the first time in their entirety.  相似文献   

Infection rates in contaminated surgical procedures: a comparison of prophylactic treatment for one day or four days     

W R Klein  E C Firth 《The Veterinary record》1988,123(22):564-566

Eighty-three calves with a complicated umbilical hernia were included in a randomised prospective study. The frequency of wound infection was compared in two groups. The first group received antibiotics for one day, the second group for four days. The infection rate in calves receiving antibiotics for one day was 25 per cent compared with 8 per cent in calves treated for four days (P less than 0.05). Male calves were more susceptible to infection than female calves.  相似文献   

Development of an artificial diet for mass rearing of the spiny bollworm,Earias insulana     

M. Klein  A. Navon  Myrto Andreadou  Sara Keren 《Phytoparasitica》1981,9(2):145-148

An artificial diet for rearing the spiny bollworm,Earias insulana (Boisd.), was developed in experiments with three successive generations. The present recommended diet is based on kidney beans, alfalfa meal, whole powdered milk and yeast; methyl-P-hydroxy benzoate, chloramphenicol and formaldehyde were included as preservatives. The effect of the diets on the insect quality is discussed.  相似文献   

An attempt to prevent acute toxoplasmosis in macropods by vaccination with Hammondia hammondi     

GL REDDACLIFF  SJ PARKER  JP DUBEY  PJ NICHOLLS  AM JOHNSON  DW COOPER 《Australian veterinary journal》1993,70(1):33-35

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Lincomycin and spectinomycin in the treatment of breeding rams with semen contaminated with ureaplasmas     

S. Marcus  G. Ziv  A. Glickman  D. Ozbonfil  B. Bartoov  A. Klein 《Research in veterinary science》1994,57(3):393

Ureaplasma species were isolated from semen samples collected sequentially from one Awassi and three Assaf breeding rams. Each ram was injected subcutaneously with an aqueous solution of lincomycin and spectinomycin for five consecutive days at a dose equivalent to 4·5 mg kg⁻¹ lincomycin and 9·0 mg kg⁻¹ spectinomycin daily. Serum and semen samples were collected at intervals during the treatment and assayed for lincomycin. No Ureaplasma species were isolated from semen samples collected during the course of the treatment and at intervals for 17 days after the last treatment. The concentration of lincomycin in semen ranged from 0·51 μg ml⁻¹ four hours after treatment to 0·08 μg ml⁻¹ 24 hours after treatment, and these levels were three to nine times higher than the corresponding serum concentrations.  相似文献   

Carbon kinetics of milk formation in Holstein cows in late lactation   总被引：3，自引：0，他引：3  

T W Boutton  H F Tyrrell  B W Patterson  G A Varga  P D Klein 《Journal of animal science》1988,66(10):2636-2645

Carbon transfer to milk in Holstein cows in late lactation was measured by introducing changes in the natural stable carbon isotope composition of the feed. Six Holstein cows in mid-lactation were placed on a diet naturally low in 13C (-25.0% vs Pee Dee belemnite [PDB] an international carbon isotope standard), based on alfalfa-barley, and six others were placed on a diet naturally enriched in 13C (-11.5% vs PDB), based on corn. After a 7-wk equilibration period on these diets, three cows were switched from alfalfa-barley to corn, and three were switched from corn to alfalfa-barley. The three other cows in each group served as controls. 13C/12C ratios were measured in daily morning milk samples during the week before and for 6 wk after the changes in diet. After the diets had been switched, milk isotope ratios rapidly approached the isotopic composition of the new diet, indicating rapid transfer of dietary carbon into milk. The data were consistent with a model whereby milk was synthesized from a single precursor pool that responded rapidly to dietary perturbation. The milk precursor pool had a half-life of approximately .9 d and had a mass of approximately 7 kg of carbon, which was renewed daily by the entry of 5 kg of digestible dietary carbon.  相似文献   

Nutrient dependence of energy conservation requirements in rats. 4. The influence of protein levels of food on energy conservation requirements of rats during growth and after conclusion of the intensive growth phase     

L Hoffmann  M Klein  R Schiemann 《Archives of Animal Nutrition》1987,37(1):1-14

Albino rats bred in the institute (Wistar line) divided into 3 groups of 9 animals each received, beginning at the age of 4 weeks, feed mixtures with 10, 40 and 70% protein in the rations over a period of 24 weeks divided into 14 subperiods of study. The feed mixture changed cyclically for the groups of animals after each sub-period. Every period was divided into a growth period (8 days) with the rats kept in metabolism cages and a period of feeding on maintenance level (4 days) with the rats kept in respiration chambers. In both periods the temperature was kept constant at 30 degrees C. On 3 days of feeding on the maintenance level the metabolism parameters of energy, C and N metabolism were measured and energy maintenance requirement was ascertained. Both the energy maintenance requirement of the growing rats (up to 200 g live weight) and that of the nearly fully grown and fully grown rats resp. (greater than 200 g live weight) significantly depended on the nutrient composition of the feed mixtures supplied. It increased with the increasing protein and simultaneously decreasing carbohydrate quotas in the feed. On an average of the studies the rats had, in the sequence of 10, 40 and 70% protein content, an energy maintenance requirement of 383 +/- 31 (n = 105), 415 +/- 31 (n = 106) and 459 +/- 36 kJ metabolizable energy/kg LW0.75.d (n = 102). Energy maintenance requirement behaved relatively like 100:108:120. Based on the fact that energy maintenance requirement may be considered the requirement of ATP, relative expectancy values for energy maintenance requirement can be calculated with the energetic efficiency of the ATP synthesis (kJ metabolizable energy/Mol ATP gain) in nutrient catabolism from the relation of the experimentally ascertained nutrient metabolism at a variant supply of protein of 100:110:118. The hypothesis that the efficiency of ATP synthesis in the catabolism of the main nutrients supplying energy can be considered a relative measure of the dependence of the energy maintenance requirement on nutrient composition has been confirmed in this experiment. Different findings in earlier experiments raise the question if those findings were influenced by adaptation effects. An experimental solution of this question is considered important.  相似文献   

Bioeconomic firm-level model of beef,forage and grain farms in Western Canada: Structure and operation     

Kurt K. Klein  Bernard H. Sonntag 《Agricultural Systems》1982,8(1):41-53

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