Digital Commons Network^™

Radiation-Induced Fibrosis: The Structure/Function Relationship, J. C. Murray

Scanning Microscopy

Fibrosis is a frequent complication of therapeutic radiation delivered to organ sites such as the thorax and pelvic region. We investigated the relationship between function, and biochemical and structural changes in the lung and colon of CBA mice irradiated with 240 kV X-rays. Progressive changes in lung function, as evidenced by increased breathing rates were observed out to 6 months post-irradiation. Biochemical studies demonstrated increased metabolism (synthesis and breakdown) of collagen around 6 months after irradiation, but provided no evidence of net collagen accumulation. Analysis of collagen isotypes revealed a slight increase in the ratio of types I and Ill. …

Optical Methods For Imaging Ionic Activities, Roger B. Moreton

Scanning Microscopy

Optical fluorescence is characteristic of molecules and their environment, and dyes can be made whose fluorescence is altered by reversible binding to specific ions. By introducing these into the cytosol, fluorescence microscopy can be used to form dynamic images of ionic activities in living cells under experimental manipulation. Optical fluorescence spectra are broad-band, and if specific ion binding alters the wavelength of maximal excitation or emission, quantitative measurements can be made from the ratio of images taken at two different wavelengths, eliminating errors due to spatial variations in dye concentration and optical path-length. This method is analogous to continuum normalisation …

Crystallization Of Calcium Oxalate And Calcium Phosphate At Supersaturation Levels Corresponding To Those In Different Parts Of The Nephron, Ján Lupták, Hanne Bek-Jensen, Anne-Marie Fornander, Inge Höjgaard, Mari-Anne Nilsson, Hans-Göran Tiselius

Scanning Microscopy

The risk of crystallization in solutions, with a composition corresponding to that of urine in various parts of the nephron, was assessed by studying urine samples containing standardized increments of calcium and oxalate concentrations. The experiments were carried out in salt solutions with and without dialysed urine and the appearance of crystals was detected and measured with a Coulter counter. With increased concentrations of calcium, crystals of calcium phosphate were predominantly formed in solutions with a composition corresponding to that in the proximal and distal tubuli, whereas, calcium oxalate was the primary crystallization product in solutions with a composition corresponding …

Effects Of Acute Acid Loading On The Risk Of Calcium Phosphate And Calcium Oxalate Crystallization In Urine, P. J. Osther, J. Bollerslev, J. R. Nørgård, K. Engel, P. Kildeberg

Scanning Microscopy

The aim of this study was to examine the risk of calcium phosphate and calcium oxalate crystallization during acute acid loading under controlled conditions.

The effects of acute acid loading on rates of renal excretion of calcium, magnesium, phosphate, citrate, oxalate and urine pH were studied in healthy subjects. The risk of calcium phosphate and calcium oxalate crystallization were evaluated by estimates of the ion activity products of calcium phosphate [AP(CaP)-index] and calcium oxalate [AP(CaOx)-index] according to Tiselius. In addition, the risk of brushite [AP(Bru)-index] crystallization was estimated.

An acute acid load administered as ammonium chloride (NH₄Cl) produced …

Changes Of Ion And Water Content Of Mouse Intestinal Cells After Pilocarpine And Isoproterenol Stimulation, Thomas Von Zglinicki, Godfried M. Roomans

Scanning Microscopy

Cytoplasmic monovalent ion and water contents in morphologically defined mice jejuna) cells were measured by X-ray microanalysis in order to gain insight into the cell-type specificity of intestinal electrolyte transport mechanisms. Ion and water contents were measured independently. It was found that in some cases net fluxes of ions and water do not correspond to the assumption of constant osmotic activity of cytoplasmic Na and K ions. Stimulation of secretion with the cholinergic secretagogue pilocarpine resulted in efflux of Cl^- from and influx of K⁺ into crypt enterocytes containing small secretion granula (crypt A cells). No significant changes …

Laser Microprobe Mass Spectrometry In Biology And Biomedicine, S. Eeckhaoudt, L. Van Vaeck, R. Gijbels, R. E. Van Grieken

Scanning Microscopy

An overview is given of laser microprobe mass spectrometry (LMMS) in biology and biomedicine (1989-1993). The present instrumentation and its analytical features are surveyed. Applications are presented with special attention on human and animal tissue samples, as well as plant material. The capabilities of LMMS to study the element distribution in histological sections, to identify the chemical composition of inorganic inclusions and to generate structural information from organic compounds are evidenced.

Ion Microscopy In Biology, George H. Morrison, Isabelle Gay, Subhash Chandra

Scanning Microscopy

Ion microscopy, a mass spectrometry based isotopic imaging technique, is uniquely suited for ion transport-related problems in biological systems. Due to its high sensitivity, it can image the transport and distribution of both major and minor elements (isotopes) at subcellular resolutions. The images of major elements such as K, Na, Cl, etc., can be viewed directly and recorded in real-time from the microchannel plate-fluorescent screen detector of the instrument. The low concentration physiologically important elements, such as Ca, need about one minute of integration for good quality imaging. The isotopic imaging capability of ion microscopy provides a unique approach for …

Use Of In Vitro Systems For X-Ray Microanalysis, Jarin Hongpaisan, Ann-Christin Mörk, Godfried M. Roomans

Scanning Microscopy

The use of X-ray microanalysis in human pathology may require the use of cryoprepared tissue. Often it is impossible to carry out freezing of the tissue in an optimal way, and in addition, it is difficult to carry out experiments in living patients. The use of in vitro systems and cell cultures allows separation of the process of tissue removal and the freezing procedure, and also makes testing of pharmacological or toxic substances possible. In experiments with animal tissue it was shown that incubation in a physiological buffer induced significant changes in the concentrations of Na, K, and Cl. In …

Measurement Of Subcellular Ca2+ Redistribution In Cardiac Muscle In Situ: Time Resolved Rapid Freezing And Electron Probe Microanalysis, Meredith Bond, Mark D. Schluchter, Eva Keller, Christine S. Moravec

Scanning Microscopy

To directly assess the physiological roles of sarcoplasmic reticulum (SR) and miitochondria (MT), we have utilized energy dispersive electron probe microanalysis (EPMA) on ultrathin freeze-dried cryosections from isolated papillary muscles, rapidly frozen at precise time points of the contractile cycle. Using this approach, we can detect redistribution of subcellular Ca²⁺ during the cardiac contractile cycle. Changes in Ca²⁺ of less than 1.0 mmol/kg dry wt can be detected. By determining the variability of the Ca²⁺ measurements in preliminary experiments, we have also demonstrated that it is possible to optimize experimental design, i.e., to predict the number of …

1994 Annual Report, Various Authors

Annual Reports

No abstract provided.

Price Impacts Of Concentration, Timing And Product Characteristics In Feeder Cattle Video Auctions, Chris Fawson, Deevon Bailey, Terrence F. Glover

Economic Research Institute Study Papers

This research investigates the differential effect of timing and product characteristic based measures of buyer concentration on the selling price of auctioned feeder cattle. Empirical results suggest that the fundamental dynamic price generation mechanisim in feeder cattle auctions is affected by measures of buyer concentration.

Fee Hunting On Mixed Public And Private Land: An Economic Review And Assessment, E. Bruce Godfrey, Darwin B. Nielsen

Economic Research Institute Study Papers

No abstract provided.

An Initial Analysis Of The Mink Oil Market: Preliminary Report To Morgan County, Utah, Michael R. Thomsen, Deevon Bailey

Economic Research Institute Study Papers

No abstract provided.

General Catalog 1994-1996, Utah State University

University Catalogs

Contains course descriptions, University college calendar, and college administration.

Race—America’S Rawest Nerve, Ted Pease

Journalism and Communication Faculty Publications

No abstract provided.

Uinta National Forest Rangeland Ecosystem Forest Plan Amendment: Final Environmental Impact Statement, U.S. Forest Service

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

This final environmental impact statement describes alternatives, including a "no action" alternative for management of national forest rangeland resources on the Uinta National Forest.

Partnerships In Progress, U.S. Prairie Pothole Joint Venture Accomplishments 1987-1993, Terry A. Messmer, C. A. Lively

Wildland Resources Faculty Publications

No abstract provided.

Open Stream Collection And Diversion: An Added Dimension In Providing Water For Grazing Animals, United States Bureau Of Land Management

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

This technical note describes an effective system for collecting water from open streams and conveying it several miles via pipeline systems to watering troughs in arid locations. Perhaps one of the greatest challenges in managing lands that produce forage for grazing animals is to strike a desirable balance between forage and water. However, on native grazing lands, this is rarely the case due to terrain and uneven distribution of water. The "open stream collection and diversion system" addresses this issue with a specific engineering solution.

Managing Coarse Woody Debris In Forests Of The Rocky Mountains, U.S. Forest Service

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

Fourteen habitat types were examined. Coarse woody debris management recommendations were developed by using ectomycorrhizae as a bioindicator of healthy, productive forest soils.

Pine Valley Ridge Source: A Superior Selected Germplsm Of Black Sagebrush, U.S. Forest Service

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

This document establishes the basis for the release of Pine Valley Ridge Source, a superior selected germplasm of black sagebrush

Nutritive Quality And Mineral Content Of Potential Desert Tortoise Food Plants, United States Department Of Agriculture, Forest Service

Plants

Minerals and nutrients for desert tortoise food plants from the northeastern Mojave Desert are generally in the normal range for semiarid environments, except that sodium values are low for plants and soil. Annual forbs are often higher in nutritive quality than other plant classes.

Planting Guide For Utah, Howard Horton

All Archived Publications

No abstract provided.

Nursery Pest Management Final Environmental Impact Statement Record Of Decision, United States Forest Service

Record of Decisions (ID)

The Final Environmental Impact Statement (FEIS) documents results of the analysis of alternatives for pest management at the USDA Forest Service, Lucky Peak Nursery in the Intermountain Region. I have reviewed the FEIS and related materials, including responses to the Draft Environmental Impact Statement (DEIS) published in December 1991. My decision is based upon that review.

Uinta National Forest, Rangeland Ecosystem Forest Plan Amendment, Final Environmental Impact Statement, United States Forest Service

Final environmental Impact Statements (UT)

This Final Environmental Impact Statement describes alternatives, including a "No Action" alternative for management of National Forest Rangeland Resources on the Uinta National Forest. Alternatives range from no change from past management practices, which in some instances have resulted in less than favorable ecological conditions on National Forest Rangelands and riparian resources, to managing these resources to achieve the "Potential Natural Community" in terms of vegetative cover types and condition. The environmental consequences of all alternatives considered in detail are displayed. The alternative selected for implementation will become an amendment to the Uinta National Forest Land and Resource Management Plan. …

Mcmurry Oil Company Jonah Prospect Field Natural Gas Development Environmental Assessment, United States Department Of The Interior Bureau Of Land Management

Environmental Assessments (WY)

The U.S. Department of Interior, Bureau of Land Management (BLM), prepared this Environmental Assessment (EA) to evaluate and disclose potential environmental impacts of development of a new natural gas field known as the Jonah Prospect Field (Jonah Field, project area). McMurry Oil Company (McMurry) proposes to drill 40 natural gas wells and construct associated well pads, access roads, gathering and sales pipeline systems; expand an existing compressor station; and include a wareyard at their existing office site.

Questar Pipeline Company, Environmental Assessment For The Birch Creek Natural Gas Pipeline, United States Department Of The Interior Bureau Of Land Management

Environmental Assessments (WY)

Questar Pipeline Company (Questar) is a natural gas pipeline transportation company that operates more than 2,400 miles of transmission and gathering pipelines in northwestern Colorado, southwestern Wyoming, and northern and central Utah and who, through its interconnections with other major pipeline, provides customers with gas gathering, transportation, and storage services. Questar has applied to the Bureau of Land Management (BLM), Rock Springs District, for approval to construct the Birch Creek Pipeline in southwestern Sublette County, eastern Lincoln County, and northwestern Sweetwater County, Wyoming (Figure 1.1). The proposed pipeline would be a gathering line for existing and future natural gas fields …

Alternative Measures Of Livestock Dependency, E. Bruce Godfrey, Verl L. Bagley

Economic Research Institute Study Papers

No abstract provided.

Environmental Assessment Animal Damage Control On Public Lands Administered By The U.S. Department Of The Interior, Bureau Of Land Management, Casper District, Wyoming, United States Department Of The Interior Bureau Of Land Management

Environmental Assessments (WY)

The Bureau of Land Management (BLM) and the Animal and Plant Health Inspection Service (APHIS) recognize that native animals are resources of value and interest to the American people. Animal damage control (ADC) management may be required to minimize depredations to livestock and wildlife species; to protect threatened and endangered species; to maintain viable populations of native wildlife species; to preserve ecologically unique areas; to minimize rodent and other wildlife damage to cropland, grassland, and forestland; and, to suppress animal-borne diseases. ADC functions as a supplement to, not a substitute for, standard husbandry practices and techniques.

Shadow Prices For Forage On Western Rangelands: A Methodological Comment, E. Bruce Godfrey, Darwin B. Nielsen

Economic Research Institute Study Papers

The fees charged for using federally administered lands has been a controversial topic for many decades. These fees are often compared to estimated forage values (shadow prices) obtained from a linear programming (LP) model. Researchers have shown that both the fee and non fee costs of grazing must be considered in setting grazing fees. LP models used to derive forage values must also consistently consider the fee and non fee costs of grazing. The LP model used in this study shows that the shadow prices derived are directly affected by how non fee variable costs of grazing are incorporated in …

The Horse Industry In Utah, E. Bruce Godfrey

Economic Research Institute Study Papers

No abstract provided.