Todd Aaron Armstrong

Works (12)

Updated: July 5th, 2023 16:01

2004 article

Effect of dietary copper source (cupric citrate and cupric sulfate) and concentration on growth performance and fecal copper excretion in weanling pigs12

Armstrong, T. A., Cook, D. R., Ward, M. M., Williams, C. M., & Spears, J. W. (2004, April 1). Journal of Animal Science.

By: T. Armstrong*, D. Cook, M. Ward, C. Williams* & J. Spears*

topics (OpenAlex): Animal Nutrition and Physiology; Meat and Animal Product Quality; Ruminant Nutrition and Digestive Physiology
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2004 article

Effect of dietary trace mineral concentration and source (inorganic vs. chelated) on performance, mineral status, and fecal mineral excretion in pigs from weaning through finishing12

Creech, B. L., Spears, J. W., Flowers, W. L., Hill, G. M., Lloyd, K. E., Armstrong, T. A., & Engle, T. E. (2004, July 1). Journal of Animal Science, Vol. 82, pp. 2140–2147.

By: B. Creech n, J. Spears n, W. Flowers n , G. Hill *, K. Lloyd n, T. Armstrong n, T. Engle n

MeSH headings : Animal Feed; Animal Nutritional Physiological Phenomena; Animals; Chelating Agents / pharmacology; Copper / administration & dosage; Copper / metabolism; Dose-Response Relationship, Drug; Feces / chemistry; Female; Iron / administration & dosage; Iron / metabolism; Manganese / administration & dosage; Manganese / metabolism; Nutritional Status; Random Allocation; Swine / growth & development; Swine / metabolism; Trace Elements / administration & dosage; Trace Elements / metabolism; Weaning; Zinc / administration & dosage; Zinc / metabolism
topics (OpenAlex): Animal Nutrition and Physiology; Animal Behavior and Welfare Studies; Genetic and phenotypic traits in livestock
TL;DR: Reducing the concentrations of Zn, Cu, Mn, and Fe typically supplemented to pig diets will greatly decrease fecal mineral excretion without negatively affecting pig performance from weaning through development. (via Semantic Scholar)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2003 article

Effect of boron supplementation of pig diets on the production of tumor necrosis factor-α and interferon-γ1,2

Armstrong, T. A., & Spears, J. W. (2003, October 1). Journal of Animal Science.

By: T. Armstrong n & J. Spears n

MeSH headings : Animals; Boron / administration & dosage; Boron / pharmacology; Dietary Supplements; Inflammation / blood; Inflammation / immunology; Inflammation / veterinary; Injections, Intramuscular / veterinary; Interferon-gamma / biosynthesis; Interferon-gamma / drug effects; Kinetics; Lipopolysaccharides / immunology; Lipopolysaccharides / pharmacology; Phytohemagglutinins / immunology; Phytohemagglutinins / pharmacology; Random Allocation; Swine / immunology; Swine Diseases / blood; Swine Diseases / immunology; Tumor Necrosis Factor-alpha / biosynthesis; Tumor Necrosis Factor-alpha / drug effects
topics (OpenAlex): Animal Nutrition and Physiology
TL;DR: The data indicate that dietary B supplementation increased the production of cytokines following a stress, which indicates a role of B in the immune system; however, these data do not explain the reduction in localized inflammation following an antigen challenge in pigs. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2002 article

Long-term effects of boron supplementation on reproductive characteristics and bone mechanical properties in gilts

Armstrong, T. A., Flowers, W. L., Spears, J. W., & Nielsent, F. H. (2002, January 1). Journal of Animal Science, Vol. 80, pp. 154–161.

By: T. Armstrong n, W. Flowers n , J. Spears n & F. Nielsent*

MeSH headings : Animal Nutritional Physiological Phenomena; Animals; Biomechanical Phenomena; Bone and Bones / chemistry; Bone and Bones / drug effects; Bone and Bones / physiology; Boron / pharmacology; Dietary Supplements; Female; Male; Random Allocation; Reproduction / drug effects; Reproduction / physiology; Swine / metabolism; Swine / physiology
topics (OpenAlex): Plant Micronutrient Interactions and Effects; Trace Elements in Health; Magnesium in Health and Disease
TL;DR: Results indicate that B may have beneficial effects upon reproductive and bone characteristics in gilts, which may be related to increased bone turnover in B-supplemented gilts. (via Semantic Scholar)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2001 article

Effect of dietary boron on growth performance, calcium and phosphorus metabolism, and bone mechanical properties in growing barrows.

Armstrong, T. A., & Spears, J. W. (2001, January 1). Journal of Animal Science.

By: T. Armstrong n & J. Spears n

MeSH headings : Animal Nutritional Physiological Phenomena; Animals; Biomechanical Phenomena; Bone and Bones / physiology; Boron / administration & dosage; Boron / metabolism; Calcium / metabolism; Femur / physiology; Male; Phosphorus / metabolism; Random Allocation; Swine / growth & development; Swine / metabolism
topics (OpenAlex): Plant Micronutrient Interactions and Effects; Animal Nutrition and Physiology; Trace Elements in Health
TL;DR: The data indicate that B supplementation to pigs can increase growth and bone strength without greatly affecting Ca and P metabolism. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2001 article

Effect of pharmacological concentrations of dietary copper on lipid and cholesterol metabolism in pigs

Armstrong, T. A., Spears, J. W., Engle, T. E., & See, M. T. (2001, September 1). Nutrition Research, Vol. 21, pp. 1299–1308.

By: T. Armstrong n, J. Spears n, T. Engle n & M. See n 

Contributors: T. Armstrong n, J. Spears n, T. Engle n & M. See n 

author keywords: copper; lipid metabolism; cholesterol metabolism; pigs
topics (OpenAlex): Animal Nutrition and Physiology; Trace Elements in Health; Drug Transport and Resistance Mechanisms
TL;DR: It is indicated that pharmacological concentrations of Cu have little effect on cholesterol and lipid metabolism in the Cu-adequate pig. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2001 article

Inflammatory response, growth, and thyroid hormone concentrations are affected by long-term boron supplementation in gilts.

Armstrong, T. A., Spears, J. W., & Lloyd, K. E. (2001, January 1). Journal of Animal Science.

By: T. Armstrong n, J. Spears n & K. Lloyd n

MeSH headings : Alkaline Phosphatase / blood; Animal Husbandry / methods; Animals; Borates / pharmacology; Boron / administration & dosage; Boron / pharmacology; Cholesterol / blood; Diet / veterinary; Dietary Supplements; Female; Inflammation / veterinary; Random Allocation; Swine / growth & development; Swine Diseases / blood; Thyroid Hormones / blood; Thyroxine / blood; Triiodothyronine / blood; Weaning
topics (OpenAlex): Plant Micronutrient Interactions and Effects; Animal Nutrition and Physiology; Selenium in Biological Systems; Trace Elements in Health
TL;DR: Results indicate that B may affect serum thyroid hormone concentrations, the inflammatory response, and growth in pigs. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2000 article

Boron Supplementation of a Semipurified Diet for Weanling Pigs Improves Feed Efficiency and Bone Strength Characteristics and Alters Plasma Lipid Metabolites

Armstrong, T. A., Spears, J. W., Crenshaw, T. D., & Nielsen, F. H. (2000, October 1). Journal of Nutrition.

By: T. Armstrong n, J. Spears n, T. Crenshaw * & F. Nielsen *

author keywords: boron; bone; cholesterol; triglycerides; pigs
MeSH headings : Alkaline Phosphatase / blood; Animal Nutritional Physiological Phenomena; Animals; Biomechanical Phenomena; Bone and Bones / physiology; Boron / administration & dosage; Calcium / blood; Cholesterol / blood; Female; Femur / chemistry; Femur / physiology; Lipids / analysis; Lipids / blood; Magnesium / blood; Male; Phosphorus / blood; Swine / physiology; Triglycerides / blood; Weaning
topics (OpenAlex): Plant Micronutrient Interactions and Effects; Animal Nutrition and Physiology; Trace Elements in Health
TL;DR: Two experiments were conducted to determine effects of dietary boron (B) on performance, plasma minerals and metabolites, and bone characteristics in young pigs, and B supplementation of a low B diet elicited responses of physiologic importance to pigs. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 article

Effect of Copper Source (Cupric Citrate vs Cupric Sulfate) and Level on Growth Performance and Copper Metabolism in Pigs

Armstrong, T. A., Spears, J. W., Heugten, E., Engle, T. E., & Wright, C. L. (2000, August 1). Asian-Australasian Journal of Animal Sciences, Vol. 13, pp. 1154–1161.

By: T. Armstrong*, J. Spears*, E. Heugten* , T. Engle* & C. Wright*

author keywords: copper; growth; liver; bile; bioavailability; pigs
topics (OpenAlex): Animal Nutrition and Physiology; Trace Elements in Health
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2000 article

Effects of dietary copper source and concentration on carcass characteristics and lipid and cholesterol metabolism in growing and finishing steers.

Engle, T. E., Spears, J. W., Armstrong, T. A., Wright, C. L., & Odle, J. (2000, January 1). Journal of Animal Science.

By: T. Engle n, J. Spears n, T. Armstrong n, C. Wright n & J. Odle n 

MeSH headings : Animal Feed; Animals; Cattle / growth & development; Cattle / metabolism; Cholesterol / metabolism; Copper / pharmacology; Fatty Acids / metabolism; Lipid Metabolism; Liver / metabolism; Male; Meat; Muscle, Skeletal / metabolism
topics (OpenAlex): Animal Nutrition and Physiology; Ruminant Nutrition and Digestive Physiology; Peroxisome Proliferator-Activated Receptors
TL;DR: It is indicated that as little as 20 mg of supplemental Cu/kg diet can reduce backfat and serum cholesterol and increase muscle polyunsaturated fatty acids in steers fed high-concentrate diets. (via Semantic Scholar)
Source: NC State University Libraries
Added: August 6, 2018

2000 journal article

High dietary copper improves odor characteristics of swine waste.

Journal of Animal Science, 78(4), 859.

By: T. Armstrong n, C. Williams n, J. Spears n & S. Schiffman* 

MeSH headings : Animal Feed; Animals; Citrates / pharmacology; Copper Sulfate / pharmacology; Dietary Supplements; Feces; Odorants; Swine / metabolism; Waste Management / methods
topics (OpenAlex): Odor and Emission Control Technologies; Meat and Animal Product Quality; Agriculture Sustainability and Environmental Impact
TL;DR: Data indicate an improvement in odor characteristics of swine waste with the supplementation of Cu, and lower concentrations of an organic nonsulfate Cu source resulted in similar odor characteristics in swine Waste as 225 ppm CuSO4. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: NC State University Libraries, Crossref, NC State University Libraries
Added: August 6, 2018

1999 article

Control of the weaning-to-estrus interval in sows using gonadotropins and prostaglandins during lactation.

Armstrong, T. A., Flowers, W. L., & Britt, J. H. (1999, January 1). Journal of Animal Science, Vol. 77, pp. 2533–2539.

By: T. Armstrong n, W. Flowers n  & J. Britt n 

MeSH headings : Animals; Chorionic Gonadotropin / pharmacology; Corpus Luteum / drug effects; Dinoprost / pharmacology; Estrus / drug effects; Female; Lactation; Ovulation Induction; Progesterone / pharmacology; Swine / physiology; Time Factors; Weaning
topics (OpenAlex): Animal Behavior and Welfare Studies; Animal Nutrition and Physiology
TL;DR: Results indicate that it is possible to induce ovulation immediately after farrowing, using a single injection of hCG, and this strategy can be used to uncouple weaning from the resumption of reproductive activity. (via Semantic Scholar)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

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