Flaxseed is a rich source of alpha-linolenic acid (ALA). Feeding laying hens flax seed can increase n-3 fatty acids content (FA) in eggs, thus increasing human intake of n-3 FA. However, non-starch polysaccharides (NSP), which decreases digestibility of dietary lipids and proteins. Addition of carbohydrase enzymes to flax-based layer diets...
Although fish are a nutritious food source, they also are the main source of methylmercury exposure in U.S. populations. This research examined the risks from methylmercury and benefits from omega-3 fatty acids and selenium from fish consumption. The first study provided the first region-specific quantitative risk/benefit analysis for nine commonly...
Provides an overview of the role of selenium in the diet of livestock, and discusses selenium supplementation rates and supplementation methods. Lists guidelines for assessing livestock’s selenium status and summarizes research useful to Oregon livestock producers.
This dissertation has focused on lignin byproducts that result from the alkali processing of wheat straw. The first study evaluated the application of “standard” lignin quantification methods for summative analyses of alkali-based processes. Mass closure during NaOH processing at 25, 50, and 75°C of wheat straw was evaluated using the...
The gray-tailed vole (Microtus canicaudus) demonstrated a
requirement for selenium and vitamin E. Animals deficient in both
nutrients suffered from liver necrosis and an unthrifty condition
characterized by inappetence, profuse diarrhea, and swollen eyes.
Vitamin E appeared less effective than selenium as a prophylaxis
against this syndrome.
Total body weights,...
Whole blood selenium levels were measured in 207 horses, representing 41 ranches and 11 regions throughout Oregon. Age, sex,
diet, and history of disease were recorded. Diet was divided into
three categories; local feed only, commercial feed, and Se supplemented feed. Region (p<.01), diet type (p<.01), and a region x...
Two experiments were conducted to evaluate supplementation methods and availability of selenium from environmental waste materials to grazing livestock as a potential means of waste recycling. One involved incorporation of wastes into salt for freechoice supplementation to the animals themselves, the second involved fertilizer amendments with wastes to grow Orchardgrass...
Thirty-six Suffolk ewes were randomly divided into two equal
groups. One group received a selenium (Se) deficient diet, while the
other diet contained sodium selenite at a level of 0.2 ppm Se in the
total diet. All ewes were sampled for plasma glutathione peroxidase
(GPx) and whole blood Se at...