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2002

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Articles 2431 - 2460 of 2980

Full-Text Articles in Life Sciences

Effects Of Pre-Milking Teat Sanitation On The Quality Of Raw Milk, Laurie Depiazzi, Ian Bell Jan 2002

Effects Of Pre-Milking Teat Sanitation On The Quality Of Raw Milk, Laurie Depiazzi, Ian Bell

Bulletins 4000 -

The effect of Quartermate pre-milking teat sanitation on milk quality was investigated in twelve dairy herds over a period of eight weeks. Pre-milking teat sanitation was carried out on all cows for six weeks on each of six farms and mesophile and thermophile bacteria counts of raw milks were compared before the milk line (“cluster” samples), and at various points within milking plants. Rates of mastitis, vat milk iodide levels and specific bacteria were also monitored.

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Maximising The Lamb Drop, Don Moir Jan 2002

Maximising The Lamb Drop, Don Moir

Bulletins 4000 -

Although reproductive rates vary greatly between individual properties, the average marking percentage in Western Australia still hovers around 75%. In the absence of disease it is possible to improve on this figure by undertaking some straight forward management practices at different stages of the reproductive cycle.

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Is There A Threshold Intensity For Aerobic Training In Cardiac Patients?, David P. Swain, Barry Franklin Jan 2002

Is There A Threshold Intensity For Aerobic Training In Cardiac Patients?, David P. Swain, Barry Franklin

Human Movement Studies & Special Education Faculty Publications

Purpose: Recent guidelines have recommended the use of a percentage of oxygen uptake reserve ((V) over dot O2R) for prescribing aerobic exercise intensity for cardiac patients. Moreover, these guidelines suggest that a threshold intensity may exist, below which no improvement in peak oxygen uptake ((V) over dot O-2peak) occurs, The purpose. therefore. was to translate the intensity of aerobic exercise in previous training studies using cardiac patients into %(V) over dot O2R units, and determine whether a threshold intensity exists, Methods: Twenty-three studies, using 28 groups of aerobically trained cardiac patients. were identified in …

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The Influence Of Stand Density On Rate Of Carbon Sequestration In Loblolly Pine Plantations On Mined Lands In East Texas, Jason Morton Jan 2002

The Influence Of Stand Density On Rate Of Carbon Sequestration In Loblolly Pine Plantations On Mined Lands In East Texas, Jason Morton

Electronic Theses and Dissertations

The State of Texas emits more carbon dioxide (C02) into the atmosphere than any other state in the United States. With environmental concerns escalating, the U.S. may be forced to reduce its emissions of greenhouse gases. The first target of these reductions will likely be utility companies that utilize coalfired power plants. In order to mitigate CO2 emissions, utility companies may want to either purchase carbon credits which can be obtained through carbon sequestration on NIPF lands or manage reclaimed mined lands for maximum carbon sequestration. This study determined the financially optimal planting density and management regimes for loblolly pine …

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Permeability Of Rice Cystatin Across Caco-2 Cells, Tania Serigado Antunes Jan 2002

Permeability Of Rice Cystatin Across Caco-2 Cells, Tania Serigado Antunes

LSU Master's Theses

The present work aimed at recovering, purifying, and testing rice cystatin or oryzacystatin I (OCI) bioavailability, to provide scientific evidence that rice cystatin can be used as a functional food ingredient. OCI was extracted from rice bran using 25 mM sodium phosphate buffer containing 0.15 M NaCl at pH 7.0. The resulting homogenate was heat treated, cooled and precipitated with ammonium sulfate. The recovered protein was dialyzed against 50 mM sodium acetate buffer pH 4.8 and sequentially purified by cation exchange, size exclusion, and anion exchange chromatography. Nine hundred and seventy micrograms of protein were obtained from 1 kg of …

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Imaginal Discs: The Genetic And Cellular Logic Of Pattern Formation, Michael Dietrich Jan 2002

Imaginal Discs: The Genetic And Cellular Logic Of Pattern Formation, Michael Dietrich

Dartmouth Scholarship

Review of Imaginal Discs: The Gneetic and Cellular Logic of Pattern Formation by Lewis I. Held, Jr., Cambridge University Press, 2002.

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Embryology In Wax, Michael Dietrich Jan 2002

Embryology In Wax, Michael Dietrich

Dartmouth Scholarship

Book review of Embryos in Wax: Models from the Ziegler Studio by Nick Hopwood Whipple Museum of the History of Science, 2002.

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Intellectual Property Issues In Plant Breeding And Plant Biotechnology, Mark D. Janis Jan 2002

Intellectual Property Issues In Plant Breeding And Plant Biotechnology, Mark D. Janis

Articles by Maurer Faculty

No abstract provided.

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Human Genomics Of Biotechnology, Brian Bluelake, Bob Wang, Serin Hudson, Fatih Ersan, Aaron Freier Jan 2002

Human Genomics Of Biotechnology, Brian Bluelake, Bob Wang, Serin Hudson, Fatih Ersan, Aaron Freier

Engineering and Technology Management Student Projects

Biotechnology is the term for the techniques of managing biological systems for human benefit. A biological system can range from a single cell organism to different types of plants, animals, and to the very complicated human being. Biotechnology includes a great range of scientific and technological disciplines and has a great variety of important applications in biology, medicine, agriculture, and various industries. In our report, we shall only focus on one of the most active frontiers of today's biotechnology-human genomics.

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Algal Blooms Reduce The Uptake Of Toxic Methylmercury In Freshwater Food Webs, Paul C. Pickhardt, Carol L. Folt, Celia Y. Chen, Bjoern Klaue, Joel D. Blum Jan 2002

Algal Blooms Reduce The Uptake Of Toxic Methylmercury In Freshwater Food Webs, Paul C. Pickhardt, Carol L. Folt, Celia Y. Chen, Bjoern Klaue, Joel D. Blum

Dartmouth Scholarship

Mercury accumulation in fish is a global public health concern, because fish are the primary source of toxic methylmercury to humans. Fish from all lakes do not pose the same level of risk to consumers. One of the most intriguing patterns is that potentially dangerous mercury concentrations can be found in fish from clear, oligotrophic lakes whereas fish from greener, eutrophic lakes often carry less mercury. In this study, we experimentally tested the hypothesis that increasing algal biomass reduces mercury accumulation at higher trophic levels through the dilution of mercury in consumed algal cells. Under bloom dilution, as algal biomass …

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Stomatal Responses Of Douglas-Fir Seedlings To Elevated Carbon Dioxide And Temperature During The Third And Fourth Years Of Exposure, James D. Lewis, Melissa S. Lucash, David M. Olszyk, David T. Tingey Jan 2002

Stomatal Responses Of Douglas-Fir Seedlings To Elevated Carbon Dioxide And Temperature During The Third And Fourth Years Of Exposure, James D. Lewis, Melissa S. Lucash, David M. Olszyk, David T. Tingey

Environmental Science and Management Faculty Publications and Presentations

Two major components of climate change, increasing atmospheric [CO2] and increasing temperature, may substantially alter the effects of water availability to plants through effects on the rate of water loss from leaves. We examined the interactive effects of elevated [CO2] and temperature on seasonal patterns of stomatal conductance (gs), transpiration (E) and instantaneous transpiration efficiency (ITE) in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings. Seedlings were grown in sunlit chambers at either ambient CO2 (AC) or ambient + 180 µmol mol-1 CO2 (EC), and at ambient temperature (AT) or ambient + 3.5° …

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Reconnaissance Of Pharmaceutical Chemicals In Urban Streams Of The Tualatin River Basin, Oregon, 2002, Stewart A. Rounds, Micelis C. Doyle, Patrick M. Edwards, Edward T. Furlong Jan 2002

Reconnaissance Of Pharmaceutical Chemicals In Urban Streams Of The Tualatin River Basin, Oregon, 2002, Stewart A. Rounds, Micelis C. Doyle, Patrick M. Edwards, Edward T. Furlong

Environmental Science and Management Faculty Publications and Presentations

A reconnaissance of pharmaceutical chemicals in urban streams of the Tualatin River basin was conducted in July 2002 in an effort to better understand the occurrence and distribution of such compounds, and to determine whether they might be useful indicators of human-related stream contamination. Of the 21 pharmaceutical chemicals and metabolites tested, only 6 (acetaminophen, caffeine, carbamazepine, codeine, cotinine, and sulfamethoxazole) were detected in filtered stream samples from 10 sites. The concentrations of most of the detected compounds were relatively low (less than 0.05 microgram per liter). The most frequently detected compounds were cotinine (a nicotine metabolite, 8 of 10 …

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Cases And Guidelines In Genetics, Roger B. Dworkin Jan 2002

Cases And Guidelines In Genetics, Roger B. Dworkin

Articles by Maurer Faculty

No abstract provided.

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Fear Of Fatness Among Young Irish Adolescents : Association With Obesity, Reported Iron And Folate Intake, And Dental Health, Anne C. Griffin Jan 2002

Fear Of Fatness Among Young Irish Adolescents : Association With Obesity, Reported Iron And Folate Intake, And Dental Health, Anne C. Griffin

Doctoral

OBJECTIVE: To establish the prevalence of fear of fatness (the desire to be thinner) and associated factors, including obesity, reported energy, iron and folate intakes. The difficulties in defining overweight among Irish children and an assessment of dietary and socio-economic factors related to dental caries and also reported in the group. METHODS: A one-year follow up study of 251 healthy schoolchildren at baseline (119 boys and 132 girls; mean age 11 years) attending 7 fee-paying (6 single- and 1-mixed sex) and 8 non-fee-paying (4 single- and 4 mixed-sex) schools in Dublin city center. Assessment of body image perceptions and satisfaction …

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Baseline Study Of The Hooded Pitcher Plant (Sarracenia Minor): Its Utility As An Indicator Species Of Freshwater Wetland Habitats, Dawn Beaulac, Justin Walguamery, Ryan Meyer Jan 2002

Baseline Study Of The Hooded Pitcher Plant (Sarracenia Minor): Its Utility As An Indicator Species Of Freshwater Wetland Habitats, Dawn Beaulac, Justin Walguamery, Ryan Meyer

All Volumes (2001-2008)

The hooded pitcher plant, Sarracenia minor, is an important member of bog and seepage savanna communities of the southeastern United States. Unfortunately these wetland communities have been damaged and are disappearing at an alarming rate. The goal of this study was to collect baseline data, which will be ultimately used to develop a model of the survivorship, growth rate, morphology and population dynamics of four populations of Sarracenia minor. The model will assess the effects of several environmental factors on changes in the morphology and population dynamics of S. minor on the UNF campus. Measurements on the survival, …

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Hydrotropic Solubilization Of Riboflavin By Urea, Nicotinamide And Nicotinamide Analogues In Aqueous Systems(การละลายในนํ้าฃองไรโบฟลาวินโดยสารไฮโดรโทรปิค: ยูเ..., Somlak Kongmuang Jan 2002

Hydrotropic Solubilization Of Riboflavin By Urea, Nicotinamide And Nicotinamide Analogues In Aqueous Systems(การละลายในนํ้าฃองไรโบฟลาวินโดยสารไฮโดรโทรปิค: ยูเ..., Somlak Kongmuang

The Thai Journal of Pharmaceutical Sciences

Aqueous solubility of riboflavin was increased by some pyridine derivatives. It was found that the important part of pyridine molecule for enhancing solubility was the aromatic structure. The amide chain also played more important role than acidic chain...

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An Exploration Of Relationships Between Environmental Change And Place Identity: An Analysis Of Personal Stories From The South Coast Of Western Australia, Ruth E. Rogan Jan 2002

An Exploration Of Relationships Between Environmental Change And Place Identity: An Analysis Of Personal Stories From The South Coast Of Western Australia, Ruth E. Rogan

Theses : Honours

The complex relationships between people and places have been investigated by philosophic and scientific writers of the 19th and 20th centuries and more recently by researchers within the discipline of environmental psychology. A plethora of concepts have been developed to describe the relationship between people and their environments, including place identity and place attachment. Complex relationships exist between place identity, place attachment and the physical environment. Despite this, research situated within the discipline of environmental management, which addresses changes within the biophysical environment, rarely considers the psychological impacts of such change on individuals interacting within those environments. This study investigates …

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North Jerramungup Fitzgerald Area : Catchment Appraisal Report 2001 (Reviewed 2007), Tim D. Overheu, Western South Coast Catchment Appraisal Team (Wa) Jan 2002

North Jerramungup Fitzgerald Area : Catchment Appraisal Report 2001 (Reviewed 2007), Tim D. Overheu, Western South Coast Catchment Appraisal Team (Wa)

Resource management technical reports

This report covers the North Jerramungup Fitzgerald zone, an amalgamation of the smaller sub-catchments of Jacup, Fitzgerald, Mallee Road and part of Hamersley River, North West Jerramungup, North Jerramungup and North Needilup in Western Australia. This report primarily focuses on the agricultural and natural resources at risk within the study area and attempts to identify options to manage the potential risks.

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Using Ecological Land Units In A Gap Analysis For Conservation Planning In A Southwestern Ohio Watershed, Christopher Lee Zimmerman Jan 2002

Using Ecological Land Units In A Gap Analysis For Conservation Planning In A Southwestern Ohio Watershed, Christopher Lee Zimmerman

Browse all Theses and Dissertations

Gap analysis is a method to identify insufficiency in biodiversity protection. In degraded agricultural landscapes, it requires information on the past, present, and the potential natural distribution of forest vegetation to construct a comprehensive nature reserve network. Using Geographic Information Systems (GIS), I conducted a biodiversity gap analysis to assess the representation of ecological land units (ELUs) supporting forest vegetation both within and external to the current reserve network in the Lower Twin Creek Watershed (LTCW), southwestern Ohio. I used this analysis to make conservation planning recommendations to the local park district. ELUs are based on relatively stable associations of …

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Growing Rice Grain With Controlled Cadmium Concentrations, Urszula Kukier, Rufus L. Chaney Jan 2002

Growing Rice Grain With Controlled Cadmium Concentrations, Urszula Kukier, Rufus L. Chaney

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Two solution studies were conducted a) to investigate the uptake of zinc (Zn) and cadmium (Cd) by rice plants (Oryza sativa L.) and interaction between these elements, and b) to determine experimental conditions for growing rice grain with desired Cd concentration for an animal feeding study. In both studies, free metal activities of cadmium and cationic microelements were buffered by an excess of chelating agents. The first study was a factorial design with two Zn levels (1.0 and 3.89 μM) and four Cd levels (0.81, 1.44, 2.56 and 4.55 μM) in the solution. In the second study, rice was …

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Kura Clover And Birdsfoot Trefoil Response To Soil Ph, L. R. Dehaan, M. P. Russelle, C. C. Sheaffer, N. J. Ehlke Jan 2002

Kura Clover And Birdsfoot Trefoil Response To Soil Ph, L. R. Dehaan, M. P. Russelle, C. C. Sheaffer, N. J. Ehlke

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Use of the rhizomatous perennial forage legume kura clover (Trifolium ambiguum M. Bieb.) has been limited by slow establishment. Mature kura clover responds to liming on some acid soils, but the soil pH required for vigorous growth of young plants is unknown. A factorial greenhouse experiment was conducted with two kura clover cultivars (Rhizo and Endura) and one cultivar of birdsfoot trefoil (Lotus corniculatus L., Norcen) planted in three soil types (Sartell loamy fine sand, Hubbard loamy sand, and Sanborg clay loam) amended with Ca(OH)2 to obtain six soil pH levels. The experiment was performed twice, once …

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Quantifying Laboratory And Field Variability To Assess Potential For Carbon Sequestration, R. A. Bowman, J. D. Reeder, B. J. Wienhold Jan 2002

Quantifying Laboratory And Field Variability To Assess Potential For Carbon Sequestration, R. A. Bowman, J. D. Reeder, B. J. Wienhold

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Accurate measurements of soil organic carbon (SOC) levels are essential to assess changes in C sequestration rates. To this end we conducted studies to evaluate laboratory variability in SOC concentration measured at USDA-ARS laboratories in Akron, CO, Cheyenne,WY, and Lincoln, NE. At the Akron laboratory we also evaluated field spatial variability within common cropping treatments in order to assess the potential to quantify significant changes in SOC content associated with rotations of varying cropping intensities. Our data showed very low coefficients of variation for SOC values from each of the three laboratories, and the same average SOC values for soils …

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Use Of Nonsettable Eggs To Evaluate Turkey Hen Fertility, M. R. Bakst, S. Mcgary, I. Estevez, T. Knapp Jan 2002

Use Of Nonsettable Eggs To Evaluate Turkey Hen Fertility, M. R. Bakst, S. Mcgary, I. Estevez, T. Knapp

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The use of nonsettable eggs (checked, cracked) to perform fresh egg breakouts to estimate true fertility and to assess the rate of sperm penetration of the perivitelline layer overlying the germinal disc was evaluated. Germinal discs and the perivitelline layer overlying the germinal disc were accessible for assessments. The stage of blastodermal development positively correlated (r = 0.65, P < 0.0001) with eggshell thickness. It was also determined that the perivitelline layer of nonsettable eggs could be isolated and stained to determine the presence or absence of sperm holes. True fertility of nonsettable eggs (checked and cracked only) and settable eggs was 90 and 95%, respectively. It was concluded that checked and cracked eggs could be used to estimate the true fertility of a flock.

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Phenotypic Traits As Reliable Indicators Of Fertility In Male Broiler Breeders, S. Mcgary, I. Estevez, M. R. Bakst, D. L. Pollock Jan 2002

Phenotypic Traits As Reliable Indicators Of Fertility In Male Broiler Breeders, S. Mcgary, I. Estevez, M. R. Bakst, D. L. Pollock

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Genetic selection procedures applied to improve broiler performance may negatively impact the subsequent reproductive efficiency of breeders, particularly in males. Identification of traits that reliably indicate individual male fertility would facilitate selection for reproduction. We hypothesized that physical traits, such as comb area, relative testicular weight, and testicular weight asymmetry, may correlate with fertility in two male-selected primary broiler breeder strains (A and B). Thirty males per strain, individually housed with an average of 10 females, were evaluated at five age periods within the 30-to-50-wk breeding cycle. Flock fertility by candling eggs at Day 19 of incubation and sample fertility …

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Mutual Interference Of Pheromone Traps Within Trap Lines On Captures Of Boll Weevils (Coleoptera: Curculionidae), Thomas W. Sappington Jan 2002

Mutual Interference Of Pheromone Traps Within Trap Lines On Captures Of Boll Weevils (Coleoptera: Curculionidae), Thomas W. Sappington

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Traps baited with the synthetic aggregation pheromone of the boll weevil (Anthonomus grandis Boheman) are often used to monitor population fluctuations, distribution, and behavior. However, many factors generate variability in daily captures, making interpretation of trapping data difficult. Previous studies have shown that wind speed in the microenvironment around a trap can greatly affect numbers captured on a given day. It is possible that variation in air movement may also generate variation in trap captures through its effects on the pheromone plume. The current study was conducted to determine whether five traps placed in a line at two commonly …

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Nitrogen Fertilization Of Irrigated Corn In A High Residual Soil N Environment In The Arkansas River V Alley, Ardell D. Halvorson, Frank Schweissing, Curtis Reule Jan 2002

Nitrogen Fertilization Of Irrigated Corn In A High Residual Soil N Environment In The Arkansas River V Alley, Ardell D. Halvorson, Frank Schweissing, Curtis Reule

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

High levels of residual soil NO3-N are present in the soils in the Arkansas River Valley where melons and other vegetable crops are produced. The amount of N fertilizer required to optimize the yield potential of crops, such as corn, following vegetables needs to evaluated to reduce NO3-N leaching potential in the Valley where high NO3-N levels have been reported in the ground water. This study evaluated the effects of N fertilizer rate (0, 50, 100, 150, 200, and 250 lb N/a) and N source (urea and Polyon®3) on corn yields following …

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One Plus One Equals Three: The Synergistic Effects Of Crop Rotation On Soil Fertility And Plant Nutrition, Walter E. Riedell, Joseph L. Pikul Jr., Lynne Carpenter-Boggs Jan 2002

One Plus One Equals Three: The Synergistic Effects Of Crop Rotation On Soil Fertility And Plant Nutrition, Walter E. Riedell, Joseph L. Pikul Jr., Lynne Carpenter-Boggs

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Corn grown under annual corn-soybean crop rotation has greater accumulation of certain mineral nutrients and higher yields than corn grown in monoculture. This study was conducted to determine if complex crop rotations (with legumes in the rotation as alfalfa hay as well as soybean row crops) and different levels of agriculture chemical input affect soil fertility and corn mineral nutrient composition. The effects of crop rotation [monoculture corn, corn-soybean 2-yr rotation, corn-soybean- wheat underseeded with alfalfa-alfalfa 4-yr rotation] and input level [high input (fertilizer application for 8.15 Mg ha-1 yield goal, prophylactic herbicide and insecticide application, fall moldboard plow/spring …

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Mineralization Of N In Swine Manure Amended Soils As A Function Of Soil Temperature, Moisture, And Texture, Brian J. Wienhold, Bahman Eghball Jan 2002

Mineralization Of N In Swine Manure Amended Soils As A Function Of Soil Temperature, Moisture, And Texture, Brian J. Wienhold, Bahman Eghball

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Manure can serve as an effective fertilizer source if used properly or can lead to environmental contamination if used improperly. Proper use of manure requires some know ledge of the availability of nutrients contained in the manure. To better understand how soil and environmental variables effect N mineralization in manure amended soils a laboratory study was conducted to measure N-mineralization rates as a function of soil texture, water regime, and temperature. This study is part of a national effort to develop a model to predict nutrient availability from various manure sources across a range of soil and environmental conditions. There …

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A Personal Account Of Creating The Sterile Insect Technique To Eradicate The Screwworm From Curacao, Florida And The Southeastern United States, Alfred H. Baumhover Jan 2002

A Personal Account Of Creating The Sterile Insect Technique To Eradicate The Screwworm From Curacao, Florida And The Southeastern United States, Alfred H. Baumhover

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The history is recounted of developing the sterile insect technique to eradicate the screwworm, Cochliomyia hominivorax (Coquerel), from the Caribbean island of Curacao, Florida and the southeastern U.S. Observations of screwworm biology and challenges faced in conducting these eradication projects are described by the author who worked on all aspects of the research and field operations. Eradication was first demonstrated on Curacao, essentially a 170 mi2 outdoor laboratory. The population dynamics of the wild screwworm was determined and overflooding ratios and dispersal patterns essential for population suppression were defined. Eradication was achieved with minimal resources by attacking the pest …

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Threat Of Foreign Arthropod-Borne Pathogens To Livestock In The United States, Ralph A. Bram, John E. George, Robert E. Reichard, Walter J. Tabachnick Jan 2002

Threat Of Foreign Arthropod-Borne Pathogens To Livestock In The United States, Ralph A. Bram, John E. George, Robert E. Reichard, Walter J. Tabachnick

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

There are many exotic animal pathogens throughout the world that, if introduced into the United States, could have a significant detrimental impact on the health of livestock, agricultural economy, the environment, and public health. Many of these pathogens are arthropod-borne and potential vectors are readily available in the United States. A number of these arthropod-borne pathogens are discussed here as examples that illustrate the potential risk and the consequences of inadvertent introductions. Several International agencies have a role in global surveillance and in controlling animal diseases should they begin to expand their range. The risk to the United States is …

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