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Randall D. Wiedmeier, PhD
Associate Professor
Utah State University
ADVS Department
4815 Old Main Hill
Logan UT 84322-4815
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| RESEARCH EXPERIENCE |
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- Surgical Procedures - Rumen fistulation and duodenal T-cannulation.
- Feed Analysis Procedures - Proximate analysis, Van Soest analysis, calcium, phosphorus, magnesium, potassium, sulfur, copper, cobalt, manganese, zinc, selenium, iron, nitrogen (ammonia, urea, nitrate, nitrite, a-amino, amide), invert sugar, pH, volatile fatty acids, lactate, viable bacteria and rumen solubility/degradability.
- Nutrient Digestibility and Utilization Procedures - In vitro (two-stage and enzmatic), In vivo (total fecal collection, internal markers and external markers), In situ (nylon bag), protein efficiency ratio, nitrogen balance and amino acid availability.
- Digestive System Kinetics Procedures - Rumen fluid dilution rate (polyethylene glycol, chromium-EDTA), rumen liquid volume and dry matter content (polyethylene glycol, chromium-EDTA), rumen particulate rate of passage and turnover rate (samarium, chromium mordant neutral detergent fibers).
- Blood Characteristic Procedures - Urea, ammonia, pH, pC02, p02, total c02, base excess, magnesium, calcium, phosphorus, potassium, sodium, volatile fatty acids, non-esterified fatty acids and glucose.
- Equipment Used - Spectrophotometer, atomic absorption spectrophotometer, flame photometer, gas chromatography, high speed centrifuge, lyophilizer, physiography and microcomputer.
- Rumen Microbiology Procedures - Enumeration (phase contrast microscopy and roll tubes), characterization (differential media with roll tubes), isolation and culturing (roll tubes and chemostat).
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