Lack of effect of tunicamycin on spermatogenesis in rams     

PL STEWART  MV JAGO  JH DUFTY  JE PETERSON 《Australian veterinary journal》1998,76(4):289-290

  相似文献   

Stage-specific Expression of Leukaemia Inhibitory Factor and its Receptor in Rabbit Pre-implantation Embryo and Uterine Epithelium During Early Pregnancy   总被引：1，自引：0，他引：1  

T Lei  ZQ Yang  T Xia  L Gan  XD Chen  JH Yuan  Y Zhu 《Reproduction in domestic animals》2004,39(1):13-18

  相似文献   

Formation of buds from callus tissue in the potato     

F. I. Lauer  F. A. Krantz 《American Journal of Potato Research》1957,34(6):158-164

  相似文献   

Annual ryegrass toxicosis in horses     

JH CREEPER  W VALE  R WALSH 《Australian veterinary journal》1996,74(6):465-466

  相似文献   

Changes in urinary and plasma oestrone sulphate concentrations after induction of foetal death in mares at 45 days of gestation     

JH HYLAND  DA LANGSFORD 《Australian veterinary journal》1990,67(10):349-351

Foetal death was induced in 10 Standardbred mares at day 45 of gestation by injecting 20 to 45 ml of hypertonic (24% W/V) saline into the conceptus at surgery. Ten mares underwent sham treatment and acted as controls. Blood and urine samples were collected every other day between days 30 and 45 post ovulation and at 0, 3 and 6 h relative to the infusion of saline in the treated mares, or sham treatment in control mares. Blood and urine samples were then collected daily between days 46 and 55 post ovulation. Urine oestrone sulphate (E1S) concentrations, measured by radioimmunoassay, increased between day 34 and day 36 of gestation in treated and control groups. In mares in which foetal death was induced, urine E1S concentrations declined post-operatively and were significantly (p less than .05) lower than controls by day 50. In plasma, E1S concentrations showed a major increase between days 36 and 40 in both groups. This was followed by a rapid decline after treatment in saline-injected mares, so that by day 48 plasma E1S concentrations in treated mares were significantly (P less than .05) lower than the controls. The results show that urinary and plasma E1S concentrations rise rapidly during early pregnancy, and are associated with a viable foetus after day 45 of pregnancy.  相似文献   

Reproductive performance of Thoroughbred mares on six commercial stud farms     

I BRÜCK  GA ANDERSON  JH HYLAND † 《Australian veterinary journal》1993,70(8):299-303

The records of 1630 mare years from 6 Thoroughbred stud farms in south eastern Australia were analysed for the years 1981 to 1986. Overall pregnancy and foaling rates were 83.9% and 69.3%, respectively. When calculated per served oestrous cycle, pregnancy and foaling rates were 54.7% and 43.1%, respectively. Pregnancy and foaling rates were higher (P < 0.001) for mares 3 to 10 years of age than for older mares. There was no difference in the pregnancy rates of maiden, barren and foaling mares. The foaling rate was significantly higher (P < 0.001) in mares that became pregnant during the first served oestrous cycle (77.8%) than in mares that needed two served oestrous cycles to become pregnant (65.4%). Of all diagnosed pregnancies, 19.5% were not completed. Pregnancy loss was lower (P < 0.05) in maiden (12.4%) than in barren (19.7%) or foaling (20.9%) mares. Twins were diagnosed in 7.8% of all pregnancies. If one conceptus was lost without external interference, 84.1% of pregnancies went to term. If one conceptus was manually crushed, 55.9% of pregnancies were maintained. If prostaglandin was used to terminate twin pregnancies, 60% of mares so treated produced foals the following year.  相似文献   

Congenital lymphoedema in a Brahman calf     

JH NORTON  GJ SIBSON  SC STURGESS 《Australian veterinary journal》1993,70(7):267-267

  相似文献   

In planta transient expression as a system for genetic and biochemical analyses of chlorophyll biosynthesis     

Ruairidh JH Sawers  Phyllis R Farmer  Peter Moffett  Thomas P Brutnell 《Plant methods》2006,2(1):15-10

Background  

Mg chelatase is a multi-subunit enzyme that catalyses the first committed step of chlorophyll biosynthesis. Studies in higher plants and algae indicate that the Mg chelatase reaction product, Mg-protoporphyrin IX plays an essential role in nuclear-plastid interactions. A number of Mg chelatase mutants have been isolated from higher plants, including semi-dominant alleles of ChlI, the gene encoding the I subunit of the enzyme. To investigate the function of higher plant CHLI, bacterial orthologues have been engineered to carry analogous amino acid substitutions to the higher plant mutations and the phenotypes examined through in vitro characterization of heterologously produced proteins. Here, we demonstrate the utility of a transient expression system in Nicotiana benthamiana for rapidly assaying mutant variants of the maize CHLI protein in vivo.  相似文献   

Optimizing Electrical Activation of Porcine Oocytes by Adjusting Pre‐ and Post‐Activation Mannitol Exposure Times     

D Kwon  IM Saadeldin  SJ Kim  SJ Park  JT Kang  HJ Park  JH Moon  OJ Koo  G Jang  BC Lee 《Reproduction in domestic animals》2014,49(6):995-999

Modifying electrical activation conditions have been used to improve in vitro embryo production and development in pigs. However, there is insufficient information about correlations of porcine embryo development with oocyte pre‐ and post‐activation conditions. The purpose of this study was to compare the developmental rates of porcine oocytes subjected to different mannitol exposure times, either pre‐ or post‐electrical activation, and to elucidate the reason for the optimal mannitol exposure time. Mannitol exposure times around activation were adjusted as 0, 1, 2 or 3 min. Blastocyst development were checked on day 7. Exposure of oocytes to mannitol for 1 or 2 min before electrical activation produced significantly higher blastocyst rates than exposure for 0 or 3 min. There was no significant difference in blastocyst rates when activated oocytes were exposed to mannitol for 0, 1, 2 or 3 min after electrical activation. While exposure of oocytes to mannitol for 1 min pre‐ and 3 min post‐activation showed significantly higher blastocyst development than 0 min pre‐ and 0 min post‐activation. It also showed higher maintenance of normal oocyte morphology than exposure for 0 min pre‐ and 0 min post‐activation. In conclusion, exposure of oocytes to mannitol for 1 min pre‐ and 3 min post‐activation seems to be optimal for producing higher in vitro blastocyst development of porcine parthenogenetic embryos. The higher blastocyst development is correlated with higher maintenance of normal morphology in oocytes exposed to mannitol for 1 min pre‐ and 3 min post‐activation.  相似文献   

Initial steps in defining the environment of the prepuce of the bull by measuring pH and temperature          下载免费PDF全文

JH Koziol  NS Fraser  T Passler  DF Wolfe 《Australian veterinary journal》2017,95(12):480-482

  相似文献