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Microwave radiation (2.45 GHz) was examined as a heat source for rewarming chilled neonatal piglets. A multi-mode cavity (60 x 60 x 60 cm) was constructed of 22 gauge perforated galvanized steel. The radiation applicator was a slotted waveguide, 70 cm in length, which was located centrally 46.5 cm a...
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Eight, pregnant, primiparous sows received i.v. infusions of TRH (5 micro g/kg; TRH group) or physiological saline (0.9% NaCl; control group) from day 105 of gestation until farrowing. The plasma concentrations of thyroxine and triiodothyronine increased in sows treated with TRH. There were no diffe...
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The objective of this study was to determine if using maternal sounds, at a higher frequency, associated with lactation, would indirectly influence milk production by the sow, thus increasing litter weight. The litters of 36 crossbred sows were allocated into 4 experimental groups. The study was div...
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The effect of oestrogens on piglet viability was determined by recording the birth to suckling interval. Starting on day 109 after mating, daily blood samples were obtained from 15 Yorkshire sows. Immediately after birth, blood samples were taken from the umbilical cord and the vena cava of piglets,...
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Several types of equipment utilizing microwave (MW) radiation were developed to provide supplemental heat to young animals including broiler embryos and chicks, newly-weaned piglets and hypothermic piglets and lambs. Exposure of broilers to MW during incubation or brooding resulted in no change in g...
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Four groups of six 28-day-old piglets (three male, three female) were assigned to each of four floors, bedded concrete, bare concrete, perforated metal or raised rubber-coated metal. Each pen was equipped with a microswitch which, when pushed, turned on three 250-W infrared lamps suspended 42 cm abo...
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Fifteen pregnant primiparous sows were infused i.v. with either 0 (T40), 25 (T425) or 50 (T450) mg thyroxine (T4)/day between days 102 and 112 of gestation. Piglets were observed for the birth to suckling interval (BTS) during the first 6 h of life. At 6 h, pre-determined piglets were subjected to a...
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A clear understanding of the role of different papillae in the pig may permit the development of a more palatable diet, thus, better utilizing anatomical structures and morphological characteristics to enhance health and productivity in this domestic species. The study used ten healthy market-size, ...