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Utah State University

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2001

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Articles 1 - 30 of 178

Full-Text Articles in Life Sciences

The Probability Of Moose Damage At The Stand Level In Southern Finland, Anneli Jalkanen Dec 2001

The Probability Of Moose Damage At The Stand Level In Southern Finland, Anneli Jalkanen

Aspen Bibliography

The probability of moose damage was studied in sapling stands and young thinning stands in southern Finland. Data from the eighth National Forest Inventory in 1986–92 were used for modelling. The frequency of damage was highest at the height of two to five meters and at the age of ten to twenty years (at the time of measurement). Moose preferred aspen stands the most and least preferred Norway spruce stands. Scots pine and silver birch were also susceptible to damage. Logistic regression models were developed for predicting the probability that moose damage is the most important damaging agent in a …

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Risk Mapping For Northern Kenya And Southern Ethiopia, D. Layne Coppock Dec 2001

Risk Mapping For Northern Kenya And Southern Ethiopia, D. Layne Coppock

Environment and Society Faculty Publications

We used results from 120 group interviews collected in 1998 to quantify how inhabitants across northern Kenya and southern Ethiopia perceive and rank various risks to their livelihoods. We also mapped risk patterns using Global Positioning System (GPS) coordinates. Respondents recognized 15 sources of risk overall, with the most common being reliable access to food and water. Other risks were not mentioned by a majority of respondents and reflected diversity in local situations. Country of residence, wealth class, gender, and predominant means of food production (pastoralism, agro-pastoralism, and farming) influenced risk ranking. For example, wealthy males were most concerned about …

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High Frequency Of Extra-Pair Paternity In Eastern Kingbirds, Michael T. Murphy, Diane L. Rowe, Robert C. Fleischer, Paul G. Wolf Nov 2001

High Frequency Of Extra-Pair Paternity In Eastern Kingbirds, Michael T. Murphy, Diane L. Rowe, Robert C. Fleischer, Paul G. Wolf

Biology Faculty Publications

Genetic parentage in the socially monogamous and territorial Eastern Kingbird( Tyrannust tyrannus) was examined in a central New York population by multilocus DNA fingerprinting. Extra-pair young were identified in 60% (12 of 20) of nests. Of the 64 nestlings profiled, 42% were sired by extra-pair males, but no cases of conspecific brood parasitism were detected. These results are markedly different from a previous electrophoretic study of the same species in a Michigan population, which reported 39% of nestlings were unrelated to one (typically the mother, quasiparasitismo)r both (conspecificb roodp arasitism) of the putative parents. In the New York population, extra-pairp …

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Effect Of Cooling Rate On Crystallization Behavior Of Milk Fat Fraction/Sunflower Oil Blends, Silvana Martini, M. L. Herrera, R. W. Hartel Nov 2001

Effect Of Cooling Rate On Crystallization Behavior Of Milk Fat Fraction/Sunflower Oil Blends, Silvana Martini, M. L. Herrera, R. W. Hartel

Nutrition, Dietetics, and Food Sciences Faculty Publications

The effect of cooling rate (slow: 0.1°C/min; fast: 5.5°C/min) on the crystallization kinetics of blends of a highmelting milk fat fraction and sunflower oil (SFO) was investigated by pulsed NMR and DSC. For slow cooling rate, the majority of crystallization had already occurred by the time the set crystallization temperature had been reached. For fast cooling rate, crystallization started after the samples reached the selected crystallization temperature, and the solid fat content curves were hyperbolic. DSC scans showed that at slow cooling rates, molecular organization took place as the sample was being cooled to crystallization temperature and there was fractionation …

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Vaccination Program For Beef Calves (2001 - Clell Bagley), Clell Bagley Oct 2001

Vaccination Program For Beef Calves (2001 - Clell Bagley), Clell Bagley

All Current Publications

Vaccines are an important tool to use in herd health programs for the protection of animal health. However, vaccines do not prevent all disease by themselves, and should be used in conjunction with good management practices. The timing of vaccination and selection of product are important considerations.

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The Invasion Of Western Waters By Non-Native Species: Threats To The West, Western Regional Panel On Aquatic Nuisance Species Sep 2001

The Invasion Of Western Waters By Non-Native Species: Threats To The West, Western Regional Panel On Aquatic Nuisance Species

All U.S. Government Documents (Utah Regional Depository)

The waters of western North America are being transformed by invasive aquatic plants, fish, and other animals from around the world. These plants and animals, which have been introduced both intentionally and accidentally by humans, can irrevocably alter our native ecosystems. While they may be harmless in their own waters, once brought into a new ecosystem where their native predators do not exist, they can harm native species by eating their food, preying on them, transmitting diseases to which the natives have no defenses, or (like many invasive aquatic plants) simply outgrowing them. Not all non-native species cause serious problems, …

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Western Rangeland Noxious Weeds: Collecting, Sharing And Using Information, U.S. Department Of The Interior, Usda, Charles Valentine Riley Memorial Foundation Sep 2001

Western Rangeland Noxious Weeds: Collecting, Sharing And Using Information, U.S. Department Of The Interior, Usda, Charles Valentine Riley Memorial Foundation

All U.S. Government Documents (Utah Regional Depository)

Western rangeland weeds such as yellow starthistle, leafy spurge, Canada thistle and Russian knapweed are causing tremendous losses to agricultural industries including both crop and livestock production. Concurrently, many public lands managed by federal agencies are being steadily invaded. As a result, these lands held in the public trust are experiencing reductions in commodity yields, recreational opportunities, biodiversity and ecosystem function. Consequently, every state in the West has noxious weed management programs that endeavor to enhance the financial and technical resources available for weed management and to assist in coordination across the diverse public and private land ownership mosaic common …

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An Accelerated Feeding Study For Dairy Beef Steers, D. R. Zobell Sep 2001

An Accelerated Feeding Study For Dairy Beef Steers, D. R. Zobell

All Archived Publications

A large number of Holstein bull (steer) calves are produced by the dairy industry. Producers who purchase these calves should understand that depending on the production strategy employed, the economic outcome could be quite broad. Dairy beef calves that are intensively managed, using aggressive feeding strategies to achieve high levels of efficiency, increase the opportunity for profitability.

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Springtails, Jay B. Karren, Alan H. Roe Sep 2001

Springtails, Jay B. Karren, Alan H. Roe

All Current Publications

Springtails are small, abundant, wingless insects of the order Collembola that live in a variety of moist habitats. Because of their small size and micro- habitat, they are seldom observed. Most of them live in the soil or in other concealed situations.

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Effect Of Cooling Rate On Nucleation Behavior Of Milk Fat-Sunflower Oil Blends, Silvana Martini, M. L. Herrera, R. W. Hartel Jun 2001

Effect Of Cooling Rate On Nucleation Behavior Of Milk Fat-Sunflower Oil Blends, Silvana Martini, M. L. Herrera, R. W. Hartel

Nutrition, Dietetics, and Food Sciences Faculty Publications

The effect of cooling rate on the crystallization behavior of mixes of high-melting milk fat fraction (HMF) and sunflower oil (SFO) was studied by following nucleation with laser-polarized turbidimetry. The initial crystals were photographed, and their thermal and polymorphic behaviors, as well as chemical composition, were investigated by calorimetry, X-ray diffraction, and capillary gas chromatography. Activation energies of nucleation were calculated using the Fisher−Turnbull equation. Despite small differences in Mettler dropping points for different ratios of SFO to HMF, induction times were significantly different between samples and were shorter at a slow cooling rate for the same supercooling. Rapidly cooled …

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Videotape - 'The Milkingschool', Clell Bagley Jun 2001

Videotape - 'The Milkingschool', Clell Bagley

All Current Publications

We recently produced a videotape here at USU, titled ìThe Milking School.î It contains both English and Spanish language versions (30 and 33 minutes). The videotape is focused on teaching novice personnel how to milk cows. There is a brief overview of milking equipment and a small segment on handling cows. Most of the information is on the step by step procedure of cow preparation and management of the milking equipment on the cow. The goal was to avoid ìtalking heads and show the cows, equipment, workers and very specific steps - and to make it available in Spanish as …

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Heartrot Fungi's Role In Creating Picid Nesting Sites In Living Aspen, J.H. Hart, D.L. Hart Jun 2001

Heartrot Fungi's Role In Creating Picid Nesting Sites In Living Aspen, J.H. Hart, D.L. Hart

Aspen Bibliography

To determine the number of cavity-containing aspens in old-growth (>80 years), we counted the number of stems containing cavities in 132 0.02-ha plots in Wyoming. There were 8.7 cavities/ha of aspen type. At least 84% of the cavity stems were alive when the initial cavity was constructed; 60% were alive when examined. Fruiting bodies and Phellinus tremulae (a heartrot fungus) were present on 71% of all cavity-bearing stems but on only 9.6% of all stems >15 cm d.b.h. Cavities were present in 7.7% and 0.2% of living stems with and without fruiting bodies, respectively. Average d.b.h. of cavity stems …

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Video Ordering Information For Realizing The Impact Of Injection Site Lesions, Clell Bagley Jun 2001

Video Ordering Information For Realizing The Impact Of Injection Site Lesions, Clell Bagley

All Current Publications

Injection of almost any drug or solution into the muscles of a food animal will result in scar tissue formation and some residual lesion in those muscle tissues. These lesions are very displeasing to consumers if found in meat products. Their presence also contributes to loss of tenderness for much of the remainder of the cut of meat. If found during processing, the lesions can be trimmed out but this still results in trim loss and increased labor costs for the processor.

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Infectious Reproductive Diseases Of Small Ruminants, Clell Bagley Jun 2001

Infectious Reproductive Diseases Of Small Ruminants, Clell Bagley

All Current Publications

Several diseases which infect small ruminants result in abortion or reduced fertility and some may also infect humans (zoonotic diseases).

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Tree Abuse, Dennis Hinkamp Jun 2001

Tree Abuse, Dennis Hinkamp

All Current Publications

No abstract provided.

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Fertilizer No Cure All, Dennis Hinkamp May 2001

Fertilizer No Cure All, Dennis Hinkamp

All Current Publications

No abstract provided.

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Australian Lasioglossum + Homalictus Form A Monophyletic Group: Resolving The "Australian Enigma", Bryan N. Danforth, Shuqing Ji Apr 2001

Australian Lasioglossum + Homalictus Form A Monophyletic Group: Resolving The "Australian Enigma", Bryan N. Danforth, Shuqing Ji

Da

No abstract provided.

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Plant Some New Vegetables This Year, Dennis Hinkamp Apr 2001

Plant Some New Vegetables This Year, Dennis Hinkamp

All Current Publications

No abstract provided.

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Realizing The Impact Of Injection Site Lesions, Clell Bagley Mar 2001

Realizing The Impact Of Injection Site Lesions, Clell Bagley

All Current Publications

A major effort has been made by the beef industry in recent years to reduce the economic loss from injection site lesions. Injections of almost any vaccine or medication causes some lesion. The extent, severity and economic loss of the resulting lesion can be greatly reduced with cleanliness and by use of careful techniques for the placement of product into specific, designated sites.

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Vaccination Programs For Dairy Young Stock, Clell Bagley Mar 2001

Vaccination Programs For Dairy Young Stock, Clell Bagley

All Current Publications

Vaccines are an important tool to use in herd health programs for the protection of animal health. However, vaccines often do not protect health by themselves, and should be used in conjunction with good management practices. The timing of vaccination and selection of product type are important considerations.

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Start Weaning Your Plants Now, Dennis Hinkamp Jan 2001

Start Weaning Your Plants Now, Dennis Hinkamp

All Archived Publications

No abstract provided.

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Fir Trees - You Have A Friend, Dennis Hinkamp Jan 2001

Fir Trees - You Have A Friend, Dennis Hinkamp

All Archived Publications

No abstract provided.

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Video - Realizing The Impact Of Injection Site Lesions, Clell V. Bagley Jan 2001

Video - Realizing The Impact Of Injection Site Lesions, Clell V. Bagley

All Archived Publications

No abstract provided.

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Effects Of Recording Media On Echolocation Data From Broadband Bat Detectors, Ethan P. White, S. D. Gehrt Jan 2001

Effects Of Recording Media On Echolocation Data From Broadband Bat Detectors, Ethan P. White, S. D. Gehrt

Biology Faculty Publications

Bat detectors are an important tool for ecological studies of bats. However, the quality and quantity of data may be affected by the recording devices used to record the output from the detector. We compared recordings of bat activity from audiocassette recorders and computers. Numbers of calls/hour, passes/hour, identifiable passes/hour, and feeding buzzes/hour were similar (all P’s > 0.1) between recording devices. All call characteristics, except for the minimum frequency and characteristic frequency, differed (P < 0.05) between tapes and computers. Species identification with discriminate function analysis was less reliable with tape data than with computer data, particularly when the model built with computer-recorded reference calls was tested with tape-recorded calls. Therefore, we suggest when tape recorders are used for field recording that they also are used to record reference calls.

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A Critical Evaluation Of Research Techniques In Animal Ecology, Michelle A. Baker Jan 2001

A Critical Evaluation Of Research Techniques In Animal Ecology, Michelle A. Baker

Biology Faculty Publications

No abstract provided.

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Tyrosine And Phenylalanine Catabolism Bylactobacillus Cheese Flavor Adjuncts, S. Gummalla, Jeff Broadbent Jan 2001

Tyrosine And Phenylalanine Catabolism Bylactobacillus Cheese Flavor Adjuncts, S. Gummalla, Jeff Broadbent

Nutrition, Dietetics, and Food Sciences Faculty Publications

Bacterial metabolism of Tyr and Phe has been associated with the formation of aromatic compounds that impart barny-utensil and floral off-flavors in cheese. In an effort to identify possible mechanisms for the origin of these compounds in Cheddar cheese, we investigated Tyr and Phe catabolism by Lactobacillus casei and Lactobacillus helveticus cheese flavor adjuncts under simulated Cheddar cheese-ripening (pH 5.2, 4% NaCl, 15°C, no sugar) conditions. Enzyme assays of cell-free extracts indicated that L. casei strains catabolize Tyr and Phe by successive, constitutively expressed transamination and dehydrogenation reactions. Similar results were obtained with L. helveticus strains, except that the dehydrogenase …

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Reversibility Of The Temperature-Dependent Opacity Of Nonfat Mozzarella Cheese, R. I. Dave, Donald J. Mcmahon, Jeff Broadbent, C. J. Oberg Jan 2001

Reversibility Of The Temperature-Dependent Opacity Of Nonfat Mozzarella Cheese, R. I. Dave, Donald J. Mcmahon, Jeff Broadbent, C. J. Oberg

Nutrition, Dietetics, and Food Sciences Faculty Publications

Salted and unsalted nonfat mozzarella cheese was made by direct acidification and stored at 4 degrees C over 60 d. Changes in cheese opacity were measured by using reflectance L* values while the cheese was heated from 10 to 90 degrees C, then cooled to 10 degrees C, and reheated to 90 degrees C. A characteristic opacity transition temperature (T(OP)) was obtained for each cheese. Both salt content and storage time influenced T(OP). Opacity during heating, cooling, and reheating formed a hysteresis. At d 1, the unsalted cheese became opaque when heated to 20 degrees C, but the salted cheese …

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Warm Clothes For Wimpy Veggies, Dennis Hinkamp Jan 2001

Warm Clothes For Wimpy Veggies, Dennis Hinkamp

All Archived Publications

No abstract provided.

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Genvir, Dale L. Barnard Jan 2001

Genvir, Dale L. Barnard

Animal, Dairy, and Veterinary Science Faculty Publications

Flamel Technologies is developing Genvir (formerly known as Viropump), a twice-daily controlled-release formulation of aciclovir, for potential use in the treatment of herpes simplex virus and varicella zoster virus infections. Genvir utilizes Flamel's proprietary Micropump technology, a microparticle-based drug delivery system designed to extend the time of absorption of drugs in the small intestine. The drug shows a comparable therapeutic efficacy to valaciclovir and famciclovir (both GlaxoSmithKline) [313393]. Phase III trials have been completed [302829]. In August 2000, Flamel filed for regulatory approval for the treatment of herpes in France, as a prelude to a pan-European approval [378641] and is …

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High Frequency Of Extra-Pair Paternity In Eastern Kingbirds, D. L. Rowe, M. T. Murphy, R. C. Feischer, Paul G. Wolf Jan 2001

High Frequency Of Extra-Pair Paternity In Eastern Kingbirds, D. L. Rowe, M. T. Murphy, R. C. Feischer, Paul G. Wolf

Biology Faculty Publications

Genetic parentage in the socially monogamous and territorial Eastern Kingbird( Tyrannust tyrannus) was examined in a central New York population by multilocus DNA fingerprinting. Extra-pair young were identified in 60% (12 of 20) of nests. Of the 64 nestlings profiled, 42% were sired by extra-pair males, but no cases of conspecific brood parasitism were detected. These results are markedly different from a previous electrophoretic study of the same species in a Michigan population, which reported 39% of nestlings were unrelated to one (typically the mother, quasiparasitismo)r both (conspecificb roodp arasitism) of the putative parents. In the New York population, extra-pairp …

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