Zobrazeno 1 - 10
of 133
pro vyhledávání: '"L.J. Burton"'
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
Autor:
B.E. Whyte, Raymond T. Cursons, John R Roche, Kelli P. A. MacDonald, Matthew C. Lucy, C. W. Holmes, G.A. Verkerk, L.J. Burton
Publikováno v:
Journal of Dairy Science. 92:526-539
The somatotropic axis [including growth hormone (GH), GH receptor, and insulin-like growth factor (IGF)-I] is uncoupled in high-producing cows in early lactation so that the liver fails to respond to GH and produces less IGF-I. This uncoupling was im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccdcf4863383c98348e5ee94c94d2ad0
https://doi.org/10.3168/jds.2008-1421
https://doi.org/10.3168/jds.2008-1421
Autor:
J. W. Penno, Lars R. McNaughton, Verkerk Ga, Donagh P. Berry, P.J.S. Gore, J.A.S. Lancaster, K.A. Macdonald, C. W. Holmes, L.J. Burton
Publikováno v:
Journal of Dairy Science. 90:3993-4003
With the introduction of a protein milk payment system in New Zealand in 1988, there was an influx of North American (NA) Holstein-Friesian (HF) genetics into New Zealand (NZ) dairy herds, leading to an increase in the average percentage of NA geneti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eaa5a7e58d9ecba3179baea76f8ec955
https://doi.org/10.3168/jds.2007-0119
https://doi.org/10.3168/jds.2007-0119
Autor:
Yveline Frobert, Susan M. Hall, Jacques Grassi, L.J. Burton, M.J. Ford, H. Li, Catriona H. Graham, Roger J. Morris
Publikováno v:
Neuroscience. 111:533-551
Expression of the normal cellular form of prion protein is both necessary and rate-limiting in the spread of prion disease, yet its cellular expression in vivo is poorly understood. To optimise immunohistochemical labelling of this protein in mouse b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8ea6692cacd502251ede2597cf5b030f
https://doi.org/10.1016/s0306-4522(01)00603-0
https://doi.org/10.1016/s0306-4522(01)00603-0
Publikováno v:
Theriogenology. 54:273-282
A previous study showed that noncyclic dairy cows treated with 10 microg of GnRH and a progesterone-releasing CIDR insert on Day 0, 25 mg of PGF2alpha and CIDR removal on Day 7, followed by 1 mg estradiol benzoate on Day 9 for those cows that still h
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d91b440a561d6e67ea476aa0c6ed5b7
https://doi.org/10.1016/s0093-691x(00)00347-2
https://doi.org/10.1016/s0093-691x(00)00347-2
Autor:
Z.Z. Xu, L.J. Burton
Publikováno v:
Journal of Dairy Science. 83:471-476
The reproductive performance of synchronized cows was compared with that of nonsynchronized cows. In trial 1, cyclic cows in five seasonal herds were randomly divided into two groups. Cows in one group (n = 515) were treated with a GnRH agonist and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84e3464d3e183be7c911ed1357a61fe9
https://doi.org/10.3168/jds.s0022-0302(00)74905-8
https://doi.org/10.3168/jds.s0022-0302(00)74905-8
Autor:
L.J. Burton, Z.Z. Xu
Publikováno v:
Journal of Dairy Science. 82:910-917
The reproductive performance of heifers after estrus synchronization and fixed-time AI was compared with nonsynchronized heifers in 25 spring-calving herds. Within herds, heifers were divided into a synchronized (n = 1123) or a control (n = 1125) gro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4cdb597be2a5c3ec665bb145c7b09384
https://doi.org/10.3168/jds.s0022-0302(99)75309-9
https://doi.org/10.3168/jds.s0022-0302(99)75309-9
Publikováno v:
Journal of Dairy Science. 81:2890-2896
The efficiency and accuracy of estrus detection using HeatWatch® (DDx Inc., Denver, CO) or visual observation were compared in an autumn-calving Friesian herd (n = 48 per group) and a spring-calving Jersey herd (n = 50 per group) grazing on pasture.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ee306e020b9782da998e0bbd89b129a
https://doi.org/10.3168/jds.s0022-0302(98)75849-7
https://doi.org/10.3168/jds.s0022-0302(98)75849-7
Autor:
L.J. Burton, Z.Z. Xu
Publikováno v:
Theriogenology. 50:905-915
In a previous study we showed that estrus synchronization with 2 treatments of PGF2 alpha 13 d apart reduced conception rate at the synchronized estrus and that this reduction occurred mainly in cows in the early luteal phase at the second PGF2 alpha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f90178d2b99d181da19946d11e57a698
https://doi.org/10.1016/s0093-691x(98)00195-2
https://doi.org/10.1016/s0093-691x(98)00195-2
Publikováno v:
Livestock Production Science. 51:41-51
Reproductive performance is an important determinant of dairy production efficiency, which has not been extensively studied in pasture-based seasonal production systems. The objectives of this study were to investigate the suitability of various fert
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::031d9dbc427a654702d585102533d65d
https://doi.org/10.1016/s0301-6226(97)00104-8
https://doi.org/10.1016/s0301-6226(97)00104-8