Zobrazeno 1 - 10
of 28
pro vyhledávání: '"J.H.G. den Daas"'
Publikováno v:
Theriogenology. 54:57-67
Semen extenders containing components such as egg yolk and skim milk are difficult to standardize and they introduce the risk of microbial contamination. A well-defined extender not originating from animal tissues would present a valuable contributio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0084bd5a4d1e9f7f935e57339989fcd2
https://doi.org/10.1016/s0093-691x(00)00324-1
https://doi.org/10.1016/s0093-691x(00)00324-1
Autor:
A.M. van Wagtendonk-de Leeuw, L. de Ruigh, J.S. Merton, A.P.W. de Roos, J.H.G. den Daas, Bas Kemp, Erik Mullaart
Publikováno v:
Theriogenology, 53(2), 575-598
Theriogenology 53 (2000) 2
Theriogenology 53 (2000) 2
Since the introduction of in vitro production (IVP) of bovine and sheep pre-implantation embryos, increased birth weights and other deviations of IVP calves and lambs compared with AI or MOET offspring have been reported. Study 1 of the present paper
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fae4d03ee5e69614c147ab29e3fbbd11
https://doi.org/10.1016/s0093-691x(99)00259-9
https://doi.org/10.1016/s0093-691x(99)00259-9
Publikováno v:
Theriogenology. 49:883-894
Data on 944 calves from 2228 in vitro-produced (IVP) bovine preimplantation embryos were compared with data on 2787 AI calves born in the same herds in 1995. Bovine preimplantation embryos were produced in vitro following ovum pick up (OPU) from dono
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::73d9a61d457a733c41059bb5fcb5d466
https://doi.org/10.1016/s0093-691x(98)00038-7
https://doi.org/10.1016/s0093-691x(98)00038-7
Publikováno v:
Theriogenology. 48:1071-1084
We designed and conducted a field trial to obtain accurate pregnancy rates of Day 7 bovine embryos after vitrification in PB1 containing 6.5 M glycerol and 6% BSA (w/v) and one-step dilution in 1 M sucrose compared with controlled slow freezing in 1.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7687a82f4be5edd8692b95e8bf218811
https://doi.org/10.1016/s0093-691x(97)00340-3
https://doi.org/10.1016/s0093-691x(97)00340-3
Publikováno v:
Journal of Dairy Science 78 (1995) 12
Journal of Dairy Science, 78(12), 2871-2876
Journal of Dairy Science, 78(12), 2871-2876
Reproductive efficiency of dairy bulls is usually measured by nonreturn rate. Nonreturn is a compound trait that is a result of two events, conception and gestation, that lead to calving. Nonreturn rates can be used to derive more elementary biologic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71b11dc53bc0ed815e28eda2dfbe980d
https://doi.org/10.3168/jds.s0022-0302(95)76917-x
https://doi.org/10.3168/jds.s0022-0302(95)76917-x
Publikováno v:
Journal of dairy science. 81(6)
The semen of 20 mature, evaluated bulls was split-sample diluted and contained 2.1 x 10(6) to 17.3 x 10(6) total spermatozoa per 0.25-ml French straw. The number of viable inseminated spermatozoa ranged from 1.1 x 10(6) to 11.8 x 10(6). Each bull had
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0f3b90b96e3be15b915686dafedf0e4
https://pubmed.ncbi.nlm.nih.gov/9684179
https://pubmed.ncbi.nlm.nih.gov/9684179
Publikováno v:
Journal of Dairy Science, 78, 921-928
Journal of Dairy Science 78 (1995)
Journal of Dairy Science 78 (1995)
Reproductive efficiency of bulls is usually measured by nonreturn rate, which is commonly defined as the proportion of cows that were inseminated and did not return for another service within a specified number of days. The AI organizations use nonre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f04a1d10f741db479ab882d80548831
https://research.wur.nl/en/publications/a-model-for-reproductive-efficiency-in-dairy-bulls
https://research.wur.nl/en/publications/a-model-for-reproductive-efficiency-in-dairy-bulls
Publikováno v:
Cryobiology. 30(1)
In this study attempts were made to improve the survival rates of bull spermatozoa after freezing/thawing and to clarify the importance of certain agents to the cryopreservation of spermatozoa. For that purpose the standard freezing extender was modi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ea69f74d2067b9da17ac399b475d648e
https://pubmed.ncbi.nlm.nih.gov/8440128
https://pubmed.ncbi.nlm.nih.gov/8440128
Publikováno v:
Livestock Production Science, 26, 107-118
Livestock Production Science 26 (1990)
Livestock Production Science 26 (1990)
Fertility of AI bulls is evaluated by non-return (NR) rates. Usually these NR rates are calculated as averages, uncorrected for effects of environments. An NR rate (0,1) is measured on the cow, but is affected by the bull and by the technician who ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e78e941e19b77967750213bcf8bde94b
https://research.wur.nl/en/publications/effects-of-ai-sires-and-technicians-on-non-return-rates-in-the-ne
https://research.wur.nl/en/publications/effects-of-ai-sires-and-technicians-on-non-return-rates-in-the-ne
Publikováno v:
Theriogenology. 49:293
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de077db29c9bb371710bf01f922be0a7
https://doi.org/10.1016/s0093-691x(98)90646-x
https://doi.org/10.1016/s0093-691x(98)90646-x