Digital Commons Network^™

Wood Utilization In Aspen: Ecology And Management In The Western United States, E.M. Wengert, D.M. Donelly, D.C. Markstrom, H.E. Worth

Aspen Bibliography

In the past, markets for quaking aspen timber from the Rocky Mountains have been insufficient to support significant harvesting. This shortage of markets severely restrained the potential for aspen management. As a result, many stands protected from wildfire gradually reverted to conifers (see the VEGETATIVE REGENERATION and FIRE chapters).

Vegetative Regeneration In Aspen: Ecology And Management In The Western United States, George A. Schier, John R. Jones, Robert P. Winokur

Aspen Bibliography

No abstract provided.

Forage In Aspen: Ecology And Management In The Western United States, Walter F. Mueggler

Aspen Bibliography

No abstract provided.

Insects And Other Invertebrates In Aspen: Ecology And Management In The Western United States, J.R. Jones, N.V. Debyle, D.M. Bowers

Aspen Bibliography

No abstract provided.

Wildlife In Aspen: Ecology And Management In The Western United States, Norbert V. Debyle

Aspen Bibliography

Aspen forests provide important habitat for many species of wildlife (Gullion 1977b), especially in the West (see the appendix to this chapter). In the coniferous forests of the interior West, aspen groves may be the only source of abundant forage; in the grasslands they may be the sole source of cover. A primary value of the aspen ecosystem in the West during the past century has been production of forage for both wildlife and domestic livestock (see the FORAGE chapter).

Guidelines For Managing Aspen, The Aspen Panel

Aspen Bibliography

No abstract provided.

Aspen Community Types Of Nevada, W. F. Mueggler

Aspen Bibliography

No abstract provided.

A Study Of Trihalomethane Precursors In Deer Creek Reservoir, Megan J. White, V. Dean Adams

Reports

Deer Creek Reservoir and tributaries were monitored from May to December 1983 in a study of the occurrence of trihalomethane (THM) precursors in the reservoir and nutrient dynamics of the reservoir system. Microcosms were used to study the effect of the following parameters on THM precursor production in the reservoir system: phosphorus loading, sediment, algal growth, and application of algicide. Additionally, THM precursor concentrations of interstitial water were analyzed in reservoir and microcosm sediment samples. Microcosms treated with ahigh phosphorus loading (70 ug/1) had THM precursor concentrations significantly higher than those measured in microcosms treated with a low phosphorus loading …

Development Of Design Criteria For Sensitizer Photooxidation Treatment Systems, Richard J. Watts, V. Dean Adams, E. Joe Middlebrooks

Reports

Sensitized photooxidation is a physicochemical process that can degrade many toxic and refractory organic pollutants. A trace quantity of sensitizer added to the waste absorbs visible light; electronically excited intermediates then transfer the energy to decompose the waste. Engeineering design criteria were developed for industrial waste treatment lagoons that would use sensitized photooxidation. Design criteria were developed regarding optimum lagoon pH, optimum sensitizer concentration, depth and sizing of lagoons, dissolved oxygen requirements, and effect of temperature on photooxidation rate. Treatment of the refractory pesticides bromacil, terbacil, and fluometuron was investigated using methylene blue and riboflavin as sensitizers. Methylene blue-sensitized photooxidation …

Preliminary Identification, Analysis, And Classification Of Odor-Causing Mechanisms Influenced By Decreasing Salinity Of The Great Salt Lake, C. Earl Israelsen, Darwin L. Sorensen, Alberta J. Seierstad, Charlotte Brennard

Reports

Introduction: The rising level of the Great Salt Lake has received a great deal of attention because of the resulting physical damage to adjoining properties, threatened distruption of major transportation facilities, and environmental damage to feeding and resting areas for migratory waterfowl. Another problem of growing concern is that some zones of the lake are producing odors that are objectionable to nearby populated areas. These odors are most offensive during the warm summer months and appear to be increasing with the rising levels and decreasing salinity of the lake water. This report presents the approach taken and the findings of …

Water Education Grades K-6, Donald R. Daugs, C. Earl Israelsen

Reports

Preface: Water Activites for Elementary Children is based upon the assumption that children learn best by doing. In education, and especilly in science, talking is not necessarily teaching. The most desireable types of learning involve direct, first hand experience, not just a teacher's interpretation of these experiences. This set of learning experiences has been designed for teachers, teachers-in-training, and children, Each concept includes background information for the teacher and learning activities for the children. Lessons are designed so taht a teacher can successfully teach a unit or lession with a minimum of knowledge, preparation, and equipmnet. Most of the suggested …

Water Education ... With Emphasis On Deer Creek Reservoir - Provo River Drainage Area (Grades 5-8), Donald R. Daugs, C. Earl Israelsen, Mardell C. Parrish

Reports

Introduction: The major goals of this publication are to: * promote an awareness of the importance of water resources associated with the target watershed; * provide teachers with learning resources which are easily used in the classroom or in the field; and * provide teachers with teaching materials which help satisfy State Core Standards.

X-Ray Microanalysis In Cryosections Of Natively Frozen Paramecium Caudatum With Regard To Ion Distribution In Ciliates, M. Schmitz, R. Meyer, K. Zierold

Scanning Electron Microscopy

Cells of Paramecium caudatum were shock-frozen without pretreatment for cryoultramicrotomy and freeze-dried for subsequent X-ray microanalysis. Na, Mg, P, S, Cl, K, and Ca were detected in different amounts in several subcellular compartments. In particular, calcium was localized below the cell surface (pellicle). Trichocysts were found to contain significant amounts of Na in their base but not in the tip. Na, Mg, P, S, Cl, K, Ca were found in electron dense deposits within the lumen of the contractile vacuole. A small K concentration was found in the cytoplasm and in the mitochondria. X-ray microanalysis of the element distribution in …

Scanning Electron Microscopy In Retinal Research, Bessie Borwein

Scanning Electron Microscopy

The literature on scanning electron microscopy (SEM) pertaining to the retina has been surveyed and described.

The first two papers on SEM and retina appeared in 1969. Most of the earlier studies concentrated on descriptions [by SEM alone, or with light microscopy (LM) and transmission electron microscopy (TEM)] of the appearance of various retinae and retinal cells [fish, newt, primates, rodents and rabbits, bullfrog]; or embryology of the chick retina. Two papers dealt with retinal disease. In all there were 25 papers in SEM/retinal research before and in 1974. Since 1975 there have been 111 papers which have used SEM …

A Rapid Technique For Counting Cracks In Rocks, W. B. Durham, J. M. Beiriger, H. C. Weed

Scanning Electron Microscopy

Using a scanning electron microscope (SEM) and an image analyzer, we have developed a technique for counting and measuring cracks in rocks which is more efficient than traditional techniques in which an operator performs all image analysis functions. The key aspect of the technique is that black-on-white tracings of fresh cracks, which can be made rather rapidly by an operator, are measured and digitized by an image analyzer. The most time-consuming step in the process has now become the generation of SEM micrographs and pertinent chemical (mineralogical) information, not the quantification of crack structure. The technique has been applied to …

Surface Roughness Contribution To The Auger Electron Emission, D. Wehbi, C. Roques-Carmes

Scanning Electron Microscopy

Scanning Auger Microscopy (SAM) experiments have shown that z height and θ slope relative to the analysed spot are parameters that contribute to the measured Auger intensity I(z, θ). For greater analysed areas specific to Auger Electron Spectroscopy (AES), the knowledge of height and slope statistical distributions P(z) and P(θ) is required. These functions have been determined by means of profilometric data. The spatial resolution of the used tactile profilometer is similar to that which characterizes AES. A mathematical relationship I { P(z), P(θ) } has been set up for Si samples whose roughness is well defined. On the other …

Utah Science Vol. 45 No. 4, Winter 1984

Utah Science

97 PHOSPHORUS NEEDS OF BEEF CATTLE J. W. Call, J. E. Butcher, J. L. Shupe, A. E. Olson, and J. T. Blake Levels of phosphorus, suggested for normal growth and reproduction, are outlined. Symptoms and lesions of phosphorus deficiency in beef cattle are discussed.

100 FAT CATTLE D. Bailey and B. W. Brorsen The price differences by month and year between Utah and other regional markets for fat cattle were charted and analyzed to help the producer to make effective marketing decisions.

104 THE MALNUTRITION/DIARRHEA CONNECTION R. W. Sidwell, B. B. Barnett, and A. W. Mahoney Using pregnant and newborn …

Twenty-Five Years Of Bonjour, Alfred N. Smith

Faculty Honor Lectures

While considering topics appropriate for this lecture, I became encouraged by the thought that my quarter of a century of experience in foreign language teaching would surely suggest some interesting possibilities. Up until this moment, I had never consciously counted my years of service, and frankly when I realized that I had spent two and one-half decades in front of the blackboard teaching French as a second language mainly to Anglo adults, I began to feel within the rumblings of a need to mark this anniversary in some significant way. Several days later in an amusing conversation with a friend, …

Sputtered Thermal Ion Mass Spectrometry As A New Quantitative Method For In-Depth Analysis, G. Blaise

Scanning Electron Microscopy

The Sputtered Thermal Ion Mass Spectrometry method (STIMS) consists of collecting a part of the matter sputtered from a solid by ion bombardment into a heated cell where it is reduced into atoms. A thermal ionization process or an electron impact process taking place in the cell yields ions which are extracted and mass analyzed. The composition of the solid is determined from ion intensities after calibration of ionization coefficients. It has been demonstrated that the method has an absolute quantitative character. Applications to elemental quantitative analysis (identification of new compounds in diffusion couples, dust particle analysis) and in-depth analysis …

Wave-Length Dispersive Microprobe Analysis Of Coated Samples Of Bulk Tissues, C. Ward Kischer, Thomas M. Teska

Scanning Electron Microscopy

Hypertrophic scars contain highly pleomorphic cells, including many from the erythrocytic series which have been extravasated. The conventional visual mode of SEM cannot distinguish the cell types with certainty except in the case of typical biconcave disc-shaped erythrocytes. Microprobe elemental analysis might be used to differentiate one type from another on the basis of iron and possibly phosphorus (for nucleated cells). Using coated specimens (gold or gold-palladium) precludes simultaneous visual mode SEM with EDX because of energy line interference with phosphorus and other elements. However, wave-length dispersive analysis offers minimal or no interference, and a coated specimen offers the use …