Jeffrey D. Armstrong

Swanchara, K. W., Armstrong, J. D., & Britt, J. (1999). Effects of active immunization against growth-hormone releasing factor on puberty and reproductive development in gilts. Journal of Animal Science, 77(7), 1807–1814. https://doi.org/10.2527/1999.7771807x

O'Kane, M., & Armstrong, J. D. (1997). Developing course materials using the World Wide Web. NACTA Journal, 41(2), 10–15.

Hevener, W., Almond, G. W., Armstrong, J. D., & Richards, R. G. (1997). Effects of acute endotoxemia on serum somatotropin and insulin like growth factor I concentrations in prepubertal gilts. American Journal of Veterinary Research, 58(9), 1010–1013.

Armstrong, J. D., Harvey, R. W., Poore, M. A., Simpson, R. B., Miller, D. C., Gregory, G. M., & Hartnell, G. F. (1995). Recombinant bovine somatotropin increases milk yield and calf gain in diverse breeds of beef cattle: Associated changes in hormones and indices of metabolism. Journal of Animal Science, 73(10), 3051. https://doi.org/10.2527/1995.73103051x

Armstrong, J. D., Coffey, M. T., Esbenshade, K. L., Campbell, R. M., & Heimer, E. P. (1994). Concentrations of hormones and metabolites, estimates of metabolism, performance, and reproductive performance of sows actively immunized against growth hormone-releasing factor. Journal of Animal Science, 72(6), 1570. https://doi.org/10.2527/1994.7261570x

ARMSTRONG, J. D., COHICK, W. S., HARVEY, R. W., HEIMER, E. P., & CAMPBELL, R. M. (1993). EFFECT OF FEED RESTRICTION ON SERUM SOMATOTROPIN, INSULIN-LIKE GROWTH FACTOR-I-(IGF-I) AND IGF BINDING-PROTEINS IN CYCLIC HEIFERS ACTIVELY IMMUNIZED AGAINST GROWTH-HORMONE RELEASING-FACTOR. DOMESTIC ANIMAL ENDOCRINOLOGY, 10(4), 315–324. https://doi.org/10.1016/0739-7240(93)90035-A

Armstrong, J. D., & Spears, J. W. (1991). Changes in growth hormone and luteinizing hormone following acute or chronic administration of an opioid agonist, FK33-824, in wethers. Journal of Animal Science, 69(2), 774. https://doi.org/10.2527/1991.692774x

Armstrong, J. D., Esbenshade, K. L., Johnson, J. L., Coffey, M. T., Heimer, E., Campbell, R. M., … Felix, A. (1990). Active immunization of pigs against growth hormone-releasing factor: Effect on concentrations of growth hormone and insulin-like growth factor 1. Journal of Animal Science, 68(2), 427. https://doi.org/10.2527/1990.682427x

ARMSTRONG, J. D., ESBENSHADE, K. L., COFFEY, M. T., HEIMER, E., CAMPBELL, R., MOWLES, T., & FELIX, A. (1990). OPIOID CONTROL OF GROWTH-HORMONE IN THE SUCKLED SOW IS PRIMARILY MEDIATED THROUGH GROWTH-HORMONE RELEASING-FACTOR. DOMESTIC ANIMAL ENDOCRINOLOGY, 7(2), 191–198. https://doi.org/10.1016/0739-7240(90)90025-U

Armstrong, J. D., Kraeling, R. R., & Britt, J. H. (1988). Morphine suppresses luteinizing hormone concentrations in transiently weaned sows and delays onset of estrus after weaning. Journal of Animal Science, 66(9), 2216. https://doi.org/10.2527/jas1988.6692216x

Armstrong, J. D. (1987). Season, suckling and nutrition alter ovarian function in swine through control of gonadotropin-releasing hormone. Dissertation Abstracts International. B, Sciences and Engineering, 47(8), 3178.

Armstrong, J. D., Britt, J. H., & Cox, N. M. (1986). Seasonal differences in function of the hypothalamic-hypophysial-ovarian axis in weaned primiparous sows. Journal of Reproduction & Fertility, 78(1), 11. https://doi.org/10.1530/jrf.0.0780011

ARMSTRONG, J. D., & BRITT, J. H. (1985). PULSATILE ADMINISTRATION OF GONADOTROPIN-RELEASING HORMONE TO ANESTROUS SOWS - ENDOCRINE CHANGES ASSOCIATED WITH GNRH-INDUCED AND SPONTANEOUS ESTRUS. BIOLOGY OF REPRODUCTION, 33(2), 375–380. https://doi.org/10.1095/biolreprod33.2.375