Trends and patterns in electrophysiologic and ablation catheter reuse in the United States.

In a survey of 140 electrophysiologic laboratories in the USA, 49% reuse catheters to some extent. Catheter reuse is associated with significant reductions in cost but is not conducted in a standardized fashion.

Factors affecting survivability of transferred whole and demi-embryos in a commercial dairy herd.

Sixty Holstein donor cows were superovulated and embryos were collected during a 6-d (27 cows) and a 4-d (33 cows) period approximately 60 d apart. Forty-three donor cows yielded embryos. Ninety-one embryos graded 1 or 2 were split and transferred to 181 recipient Holsteins.

Effect of early rearing experience on subsequent behavior and production of Holstein heifers.

Sixty-seven heifer calves were assigned at birth to one of four rearing treatments: groups of six, individual hutch, isolation, and isolation with handling (10 min daily interaction with calf feeder). Calves were on the same diet and except for group calves were in 1.2 X 2.

Facility for exercising dairy cows.

That dairy cows housed in confinement might benefit if they were exercised during the dry period prompted development of a facility for exercising dairy cows. Two methhods of the exerciser, which consist of a circular lane and a driving mechanism powered by a variable speed electric motor, are described. A speed of 3.

Effects of dominance rank changes, age, and body weight on plasma corticoids of mature dairy cattle.

The purpose was to determine whether forced change in dominance rank affected total corticoids of plasma of dairy cattle. Nineteen cows in late lactation were assigned randomly to one of two lots. Restriction of manger space enhanced observations of dominance rank during feeding for three 1-h periods per wk over 6 wk.