خيارات البحث
النتائج 1 - 3 من 3
Studies on evaluation techniques of anthelmintic efficact by fecal egg counts in cattle naturally infected with helminths
1984
Jee, C.H. | Jang, D.H. | Youn, H.J. (Seoul National Univ., Suwon (Korea R.). Coll. of Veterinary Medicine)
In the evaluation of anthelmintic efficacy by fecal egg counts for cattle naturally infected with helminths, the reasonable technique of fecal egg counts and the reliable guidelines were determined. Modified technique of Harashigeru and Kim's sedimental tube was the most reasonable in fluke egg counts. Universal egg counting technique was preciser than McMaster egg counting technique and was lower in coefficient variation. Fecal egg counts of pretreatment should be carried out twice and mean of the egg should be calculated
اظهر المزيد [+] اقل [-]Isolation and identification of mycobaction dependent acid-fast bacteria (M. paratuberculosis) from bovine fecal material
1984
Jeon, Y.S. (Seoul National Univ., Suwon (Korea R.). Coll. of Veterinary Medicine) | Lee, B.W. (Chunnam National Univ., Kwangju (Korea R.)) | Kim, J.K. (Green Cross Veterinary Products Co., Ltd., (Korea R.))
Fecal material from cattle, which was confirmed to be infected with Johne's disease by clinical and pathological symptoms, was decontaminated with 4% NaOH and inoculated into the Lowenstein-Jensen media supplemented with 1% of heat-killed Mycobacterium bovis. After 2-4 week-incubation at 37 deg C, typical acid-fast mycobacteria was isolated. The requirements of mycobactin for growth and the other biochemical properties, isolated mycobacteria was identified as Mycobacterium paratuberculosis
اظهر المزيد [+] اقل [-]Studies on selective separation of highly motile bovine sperm
1984
Kim, M.C. (Yonsei Univ., Seoul (Korea R.). Inst. of Agricultural Development)
As a fundamental study to increase the reproductive efficiency in cattle, highly motile sperm were separated and collected from raw semen, extended semen and frozen semen by different methods using various concentrations of bovine serum albumin or Tyrode's solution. Various characteristics and light microscopic and electron microscopic morphology of sperm separated by different methods were compared
اظهر المزيد [+] اقل [-]