Successful use of deep-frozen stallion semen stored for 1-7 years in pellet form at - 196 degrees C     

H Merkt  D Krause  H Bader  E Klug 《DTW. Deutsche tier?rztliche Wochenschrift》1974,81(23):599-600

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Fetlock joint flexion as the cause of a labor complication in a giraffe     

E Grunert  H Bader  L Dittrich  H P Brandt  H Merkt 《DTW. Deutsche tier?rztliche Wochenschrift》1988,95(8):315-317

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Experimental uni- and bilateral extirpation of the seminal vesicle in the stallion (author's transl)]     

E Klug  E Deegen  J Martin  H Bader  R Lieske  K Freytag 《DTW. Deutsche tier?rztliche Wochenschrift》1979,86(5):182-185

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Effects of a metabolic endurance test developed for the constitution examination of young bulls on spermatologic and endocrine parameters     

C Ganal  H Bader  H Merkt  D Schams  N M?ckle  E Kalm 《DTW. Deutsche tier?rztliche Wochenschrift》1990,97(11):470-474

The purpose of this study was to examine the influence of an eight day starvation period on semen characteristics and some endocrine parameters of young bulls. The experiments were performed with 18 bulls in two trials showing the following set-up: pre-treatment period (7 or 20 days), starvation period (8 days), realimentation period (3 days) and control period (64 days). During the pre-treatment period and the control period the bulls obtained a well-balanced food-ration, during the period of starvation only 2 kg straw daily. During the starvation period the bulls lost 6% of their bodyweight. No influence on general health could be noticed. The concentrations of testosterone, LH, bovine growth hormone, insulin and insulin-like growth factor decreased significantly during or after the period of starvation. There was no clear influence in volume, sperm density and total number of sperm due to the metabolic stress during the hunger period. The initial progressive motility of sperm was not affected. The percentage of morphological abnormal spermatozoa increased 45-55 days after the hunger period. Simultaneously the semen freezability was decreased. An influence on the acrosomal morphology of frozen/thawed spermatozoa could not be obtained. The concentration of fructose, citric acid and glycerylphosphorylcholine (GPC) of the seminal plasma was insignificantly influenced during the period of starvation. The realimentation caused a stimulating effect on the secretion mainly of GPC.  相似文献   

Tiefgefrier- und Besamungsversuche mit Hengstsperma unter Anwendung des Pelletverfahrenss*     

Von H. Bader  R. Mahler 《Reproduction in domestic animals》1968,3(1):6-13

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Use of praziquantel to control platyhelminth parasites of fish     

Chris Bader  David E. Starling  Douglas E. Jones  Matthew T. Brewer 《Journal of veterinary pharmacology and therapeutics》2019,42(2):139-153

Fish are common definitive and intermediate hosts for a variety of parasitic flatworms. In unstressed wild populations, parasitic infections often go unnoticed and are perceived to represent a lesser threat to fish health. In contrast, platyhelminth parasitism of captive fish often results in decreased weight gain and increased mortality which often necessitates chemotherapeutic treatment. The presence of platyhelminth parasites in fish tissues is not only unappealing but in some cases also represents a threat to human health. In veterinary medicine, one of the most commonly used agents with anti‐flatworm activity is praziquantel; yet, no praziquantel products are labeled for use in fish in the United States. Veterinarians may use praziquantel preparations approved for other vertebrate species under the Animal Medicinal Drug Use Clarification Act (AMDUCA). However, such extra‐label use should be informed by scientific evidence including efficacy and tissue residue studies. Herein, we review studies testing the efficacy of praziquantel for treatment of platyhelminthes along with an assessment of routes of administration, pharmacokinetics, and toxicity information.  相似文献   

Effect of Recombinant Bovine Somatotropin on Plasma Concentrations of Insulin‐like Growth Factor I,Insulin and Membrane Integrity of Bull Spermatozoa     

MB Vieira  I Bianchi  EM Madeira  VFB Roll  CA Oliveira  P Viau  I Pivato  NC Severo  FAB Del Pino  A Schneider  MN Corrêa 《Reproduction in domestic animals》2010,45(6):1110-1113

This study aimed to evaluate the effect of the exogenous recombinant bovine somatotropin (rbST) on plasma concentrations of insulin‐like growth factor I (IGF‐I), insulin and semen quality of bulls. Twenty bulls (Aberdeen Angus and Brangus) were divided by breed into two groups. Placebo group was injected with NaCl 0.9% (s.c.) and treatment group with rbST (s.c., 500 mg) at days 0 and 14 of the experiment. Immediately after semen collection, blood samples were taken on days 0, 14, 28, 42 and 56 of the experiment. Semen was also collected on day 70 of the experiment. Evaluation of sperm motility was performed at pre‐freezing and post‐thawing stage, whereas assessment of sperm membrane integrity was performed after freezing and thawing. Analysis of data revealed that the effect of treatment and treatment‐by‐collection day on plasma concentrations of IGF‐I and insulin was not significant. However, mean plasma concentrations of IGF‐I and insulin were affected (p < 0.0001) by days of blood sampling. Effect of treatment and treatment‐by‐collection day on motility of spermatozoa was similar (p > 0.05) at pre‐freezing and post‐thawing stage. Intactness of plasmalemma and tail membrane of spermatozoa at post‐thawing stage was higher (p < 0.05) in rbST‐treated group than in control. In conclusion, rbST did not affect plasma concentrations of IGF‐I and insulin, however, it did improve post‐thaw sperm membrane integrity.  相似文献   

Chemical control of two Phytophthora species infecting the canopy of Monterey pine (Pinus radiata)          下载免费PDF全文

C. A. Rolando  M. A. Dick  J. Gardner  M. K‐F. Bader  N. M. Williams 《Forest Pathology》2017,47(3)

Twelve active ingredients were screened for their ability to control foliage disease caused by Phytophthora kernoviae and Phytophthora pluvialis. Inhibition of mycelial growth and sporangial production of both pathogens were assessed in in vitro assays after exposure to three concentrations of each active ingredient. While most of these active ingredients inhibited mycelial growth in vitro, due to their widespread use, phosphite, copper oxychloride and metalaxyl‐M were selected for further study. Four rates of each active ingredient were applied to two Pinus radiata genotypes, and detached needle assays at 6 and 90 days post‐treatment were used to determine treatment efficacy and persistence. Untreated needles showed significantly larger lesions than all fungicide‐treated needles after exposure to P. pluvialis or P. kernoviae on both sampling dates. Efficacy and persistence of the three active ingredients did not increase with increase in concentration. Larger lesions were formed on more susceptible genotype after inoculation with both Phytophthora species, even when higher rates of active ingredients were applied. Phosphite, copper oxychloride and metalaxyl‐M have potential to protect commercially planted P. radiata from these two Phytophthora species.  相似文献   

Shear stiffness and its relation to the microstructure of 10 European and tropical hardwood species     

Thomas K. Bader  Josef Eberhardsteiner  Karin de Borst 《Wood material science & engineering》2017,12(2):82-91

In this study, shear stiffness properties of 10 different hardwood species and their relation to the corresponding species-specific microstructure are investigated. For this purpose, shear stiffness of 10 different hardwood species is experimentally measured by means of ultrasonic testing. In addition, a micromechanical model for hardwood is applied in order to illustrate the influence of certain microstructural characteristics such as mass density and volume fractions of vessels and ray cells on the shear stiffness. Comprehensive microstructural and mechanical data from previous investigations of the same hardwood material support the interpretation of the microstructure–shear stiffness relationships. Mass density was confirmed to be the dominant microstructural characteristic for shear stiffness. Also, ultrasound shear wave propagation velocity increases with density, particularly in the radial-tangential (RT) plane. In addition to density, comparably higher shear stiffness G_LR can be explained by comparably higher ray content and lower vessel content. As for G_LT, a ring porous structure seems to lead to higher shear stiffness as compared to a diffuse porous structure. For this shear stiffness, vessel and ray content were found to have a less impact. Also, the rolling shear stiffness G_RT was found to be higher for a diffuse porous structure than for a ring porous one. Moreover, the data supports that ray cells act as reinforcements in the RT plane and lead to higher G_RT.  相似文献   

A systematic surveillance programme for infectious salmon anaemia virus supports its absence in the Pacific Northwest of the United States          下载免费PDF全文

L L Gustafson  L H Creekmore  K R Snekvik  J A Ferguson  J V Warg  M Blair  T R Meyers  B Stewart  K I Warheit  J Kerwin  A E Goodwin  L D Rhodes  J E Whaley  M K Purcell  C Bentz  D Shasa  J Bader  J R Winton 《Journal of fish diseases》2018,41(2):337-346

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