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226 results on '"Whittier, J."'

16. 405 Impacts of 40

Author

Whittier, J, primary, Bruns, K, additional, Funston, R, additional, Volesky, J, additional, Klopfenstein, T, additional, and Adams, D, additional

Published
2018
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21. Calf removal improves conception rates to the Ovsynch and CO-Synch protocols

Author

Geary, T. W., Whittier, J. C., Hallford, D. M., and MacNeil M. D.

Subjects
Ovulation -- Regulation, Calves -- Research, Beef cattle -- Research, Conception -- Research, Animal breeding -- Research, Zoology and wildlife conservation
Abstract

Beef cows (n = 473) from two locations were stratified by breed, postpartum interval, age, and AI sire and were randomly allotted to one of four treatments for synchronization of ovulation. Ovulation synchronization protocols included the Ovsynch protocol with (n = 114) or without (n = 123) 48-h calf removal from d 7 to 9 (d 0 = 1st GnRH injection) or the CO-Synch protocol with (n = 119) or without (n = 117) 48-h calf removal from d 7 to 9. The Ovsynch protocol included administration of GnRH (100 [micro]g; i.m.) on d 0, [PGF.sub.2[alpha]] (25 mg; i.m.) on d 7, GnRH (100 [micro]g; i.m.) on d 9, and timed insemination on d 10. The CO-Synch protocol included administration of GnRH (100 [micro]g; i.m.) on d 0, [PGF.sub.2[Alpha]] (25 mg; i.m.) on d 7, and GnRH (100 [micro]g; i.m.) with timed insemination on d 9. Blood samples were collected from all cows on d -10 and d 0 for analysis of serum progesterone. Cows with at least one serum progesterone concentration greater than 1 ng/mL were considered to be cyclic at the time of treatment. Conception rates of cows that received the CO-Synch + calf removal, Ovsynch + calf removal, CO-Synch, or Ovsynch protocol (63, 61, 54, and 52%, respectively) were not different (P = 0.50). Conception rates were not different (P = 0.80) among CO-Synch- and Ovsynch-treated cows; however, both estrual status and 48-h calf removal affected conception rates. Conception rates of cyclic cows (66%) were greater (P = 0.01) than those of anestrous cows (53%), regardless of which synchronization protocol was used. When data were pooled across synchronization protocol, conception rates of cows with 48-h calf removal (62%) were greater (P = 0.09) than conception rates of cows without calf removal (53%). The CO-Synch + calf removal protocol induces a fertile ovulation in cyclic and anestrous cows, requires handling cattle just three times, results in high conception rates from timed insemination, and should be a useful program for synchronization of ovulation in beef cows. Key Words: Calf Removal, Insemination, Synchronized Females Ovulation

Published
2001

24. Proposed Photovoltaic Module Form Factor for Cells with Efficiencies Greater than 19%

Author

Krick, D., Lyell, K., McIntire, F., Stibrich, S., Booker, C., Jackson, J., Whittier, J., Darth, B., Hoffner, J., and Campbell, R.

Subjects
Standardisation as Tool for Innovation and Cost Reduction, OPERATIONS, PERFORMANCE AND RELIABILITY OF PHOTOVOLTAICS (from Cells to Systems)
Abstract

29th European Photovoltaic Solar Energy Conference and Exhibition; 3488-3492, This paper discusses a novel photovoltaic (PV) module form factor designed for high efficiency (>19%) silicon solar cells and optimized for single-axis tracking projects. Our proposed 56-cell module utilizes a longer and narrower form factor with fewer cells per circuit to improve reliability and service lifetime when compared to existing 72 cell modules combined with high efficiency cells. In addition to reliability improvements, CH2M HILL, an engineering and construction firm, analyzed major PV project lifecycle costs, including module manufacturability, installation costs, financing costs, and levelized cost of energy (LCOE). Our studies conclude that the proposed form factor change could potentially reduce LCOE by: (1) reducing total installed costs for utility-scale projects; (2) improving module reliability; (3) reducing operating and maintenance (O&M) costs.

Published
2014
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34. Impact of oral meloxicam administration before and after band castration on feedlot performance and behavioral response in weanling beef bulls

Author

Repenning, P. E., primary, Ahola, J. K., additional, Callan, R. J., additional, French, J. T., additional, Giles, R. L., additional, Bigler, B. J., additional, Coetzee, J. F., additional, Wulf, L. W., additional, Peel, R. K., additional, Whittier, J. C., additional, Fox, J. T., additional, and Engle, T. E., additional

Published
2013
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43. Comparison of stress induced by manual restraint and immobilisation in the estuarine crocodile, crocodylus porosus

Author

Franklin, C.E., Davis, B.M., Peucker, S.K.J., Stephenson, H., Mayer, Robert J., Whittier, J., Lever, J., Grigg, G.C., Franklin, C.E., Davis, B.M., Peucker, S.K.J., Stephenson, H., Mayer, Robert J., Whittier, J., Lever, J., and Grigg, G.C.

Abstract

This study compared the stress induced in captive estuarine crocodiles, Crocodylus porosus, by two different handling methods: manual restraint (noosing with ropes) and immobilization by electro-stunning. To stun, a short charge (approx. 6 s) at 110 V was delivered to the back of the necks of C. porosus using a custom-built device, which immobilized the animals for 5-10 min. Immobilized and restrained animals were measured and sexed, and the condition of the skin assessed. Blood samples were taken from some animals immediately after restraint or immobilization. Other animals were returned to their pens to recover for periods of 30 min, 1, 4, 12, 24 or 48 hours after which they were stunned and blood samples taken. Individual animals (mean body length 1.96 m, N=99) were bled only once. Haematocrit and haemoglobin concentrations were measured and plasma samples were analysed for corticosterone, glucose and lactate levels. Following restraint, there were significant increases in haematocrit, haemoglobin, glucose, lactate and corticosterone concentrations in C. porosus. For restrained animals, recovery to baseline levels occurred after approximately 8 hours. The stress response of stunned animals was significantly reduced compared to manually captured and restrained crocodiles. Both groups showed a significant increase in haematocrit, haemoglobin concentration and lactate levels, however the magnitude of change was significantly reduced, and recovery was faster in stunned animals. No increase in either glucose or corticosterone levels occurred with immobilisation. The results imply that immobilization by electro-stunning is much less stressful.

Published
2003

44. Initiation with an electron beam of chemical reactions of interest for visible wavelength lasers

Author

Whittier, J. S and Cool, T. A

Subjects
Chemistry And Materials (General)
Abstract

A description is given of the first results obtained with a new shock tube-electron beam facility designed to provide a versatile means for the systematic search for laser operation among several candidate metal atom-oxidizer systems. According to the current experimental approach, metal atoms are obtained in the vapor phase by the dissociation of metal compounds. A shock tube is employed to provide a short duration flow through an array of 29 supersonic flow-mixing nozzles. A high energy electron accelerator is used for the rapid initiation of chemical reaction in a mixed flow of encapsulated metal and oxidizer.

Published
1976

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