Digital Commons Network^™

An Introduction To Wilderness And Natural Area Management, David Kulhavy, D. B. Drummond

Faculty Publications

No abstract provided.

Seasonal Variation In The Total Volume Of Leydig Cells In Stallions Is Explained By Variation In Cell Number Rather Than Cell Size., L. Johnson, D. L. Thompson

Faculty Publications

Stereological methods were employed in two studies with stallions 1) to determine if seasonal variation in the total volume of Leydig cells is a function of cell number or cell size and 2) to characterize the annual cycle of the Leydig cell population. In the first study, numbers of Leydig cells were calculated for 28 adult (4-20 yr) stallions in the breeding or nonbreeding seasons from nuclear volume density (percentage of the decapsulated testicular volume), parenchymal volume (decapsulated testicular volume), and the volume of individual Leydig cell nuclei. The average volume of the individual Leydig cells was calculated as the …

Androgen And Progesterone Effects On Follicle-Stimulating Hormone And Luteinizing Hormone Secretion In Anestrous Mares, D. L. Thompson, F. Garza, K. B. Ashley, J. J. Wiest

Faculty Publications

No abstract provided.

Factors Related To Blood Pressure In A Biracial Adolescent Female Population, M. Liebman, L. F. Chopin, E. Carter, A. J. Clark, G. W. Disney, M. Hegsted, M. A. Kenney, Z. A. Kirmani, K. L. Koonce, M. K. Korslund

Faculty Publications

Blood pressure levels, anthropometric parameters, and dietary intakes were assessed in 1981 and 1983 in a population of black (n = 236) and white (n = 296) adolescent girls, aged 14 and 16 years in 1983. The 14-year-old black girls exhibited significantly higher mean systolic and diastolic blood pressures than whites in both years. Body weight and Quetelet index were more strongly associated with blood pressure than were height and triceps skinfold thickness. Correcting blood pressures for weight, Quetelet index, 2-year changes in height, and age at menarche decreased in each case (but did not negate) the observed race differences …

Validity Of Constant-Stress And Elastic-Instability Principles Of Stem Formation In Pinus Contorta And Trifolium Pratense, T. J. Dean, J. N. Long

Faculty Publications

Independent studies have shown that both the constant-stress and the elastic instability models describe the form of a plant's central stem. Teleologically, the constant stress model states that a stem tapers to equalize stress produced by wind pressure along the stem. The elastic instability model states that stems and branches taper to maintain similar elasticity throughout the tree and that total tree height is limited to about one-quarter of the height at which the stem would buckle under its own weight. We investigated the ability of these two models to describe the central stems of both mature and sapling Pinus …

Evidence For A Satellite Rna Associated Naturally With The U5 Strain And Experimentally With The U1 Strain Of Tobacco Mosaic Virus, R. A. Valverde, J. A. Dodds

Faculty Publications

No abstract provided.

Agriculture, Agribusiness, And Renewable And Natural Resource Program Review, B. Delworth Gardner

Faculty Publications

The State University System of Florida has es tab 1 i shed A "Quest for Excellence11 in its Master Plan. It is a bold plan of action that will "unleash the University System from those time-bound constraints which would allow only gradual change. 11 It is also clear that the State University System of Florida plans to compete successfully with the very best academic universities. In its mission statement the University of Florida, as a land-grant institution, administers the In"s·t itute of Food and Agricultural Sciences (IFAS), a special unit providing statewide food and .agricultural teaching, res.earch, and extension services. …

Simple Models For Diaphragm-Type Chlorine/Caustic Cells Ii. Effect Of Acidic Anolyte On Steady-State Caustic Yield, John Van Zee, Ralph E. White

Faculty Publications

A simple steady-state model of a diaphragm-type chlorine/caustic cell in which the diaphragm is divided into two regions by a homogeneous acid-base reaction is presented. The location of the reaction affects significantly the caustic yield and effluent concentration. The model is used to predict the location of this reaction as a function of the operating variables, the physical constants, and three measurable properties of the diaphragm. These measurable properties are the MacMullin number or resistivity ratio of electrolyte-filled diaphragm relative to the electrolyte, the Darcy's law diaphragmpermeability, and the diaphragm thickness. The model is used to predict a maximum in …

Interconnected Reproductive And Vegetative Remains Of Populus (Salicaceae) From The Middle Eocene Green River Formation, Northeastern Utah, William D. Tidwell, Steven R. Manchester, David L. Dilcher

Faculty Publications

A new specimen from the Middle Eocene Evacuation Creek Member of the Green River Formation in northeastern Utah shows a twig with several leaves of Populus wilmattae Crockrell and a fruiting raceme attache. This specimen establishes for the first time the type of fruits borne by P. wilmattae and provides additional characters with which to assess its taxonomic and evolutionary status. An associated seed shows attached placental hairs like those of extant species of Populus. The Green River fossil differs from extant Populus species in having basically palmate leaf venation and in bearing its fruiting axis on a young twig. …

Generic Competition And Pharmaceutical Innovation: The Drug Price Competition And Patent Term Restoration Act Of 1984, James J. Wheaton

Faculty Publications

This article critiques the Drug Price Competition and Patent Term Restoration Act of 1984. Part I traces the background of the two major sections of the Act by examining the recent trend toward generic competition in the pharmaceutical industry and the need perceived by some industry observers for additional incentives to pharmaceutical research. Part II of the article describes and discusses the sections of the Act designed to benefit the two segments of the pharmaceutical industry. Part III addresses the likely effect of the Act on generic competition, and Part IV provides a parallel analysis for the research-intensive pharmaceutical firms. …

Clonal Selection Of Sugar Cane For Texas And Louisiana From A Common Germplasm Pool, Stephen Kresovich, Richard D. Breaux

Faculty Publications

The sugar cane (a complex hybrid of Saccharum spp.) cultivar improvement program for the irrigated Lower Rio Grande Valley of Texas, initiated in 1961, has expanded greatly over the past 20 years. Initially, only 8 to 12 cultivars, selected from those previously released from commercial production in Louisiana or Florida, were screened annually for their production potential in the Lower Rio Grande Valley. The current introduction and screening program is more comprehensive utilizing 1) all clones advanced from the first to the second line trials at the U. S. Sugarcane Laboratory at Houma, Louisiana; 2) the advanced "CP" assignments from …

Locus-Specific Detection Of Hla-Dq And -Dr Antigens By Antibodies Against Synthetic N-Terminal Octapeptides Of The Β Chain, Thomas Deufel, Anne Grove, Hans Kofod, Åke Lernmark

Faculty Publications

Antibodies against synthetic peptides representing the class-II antigen HLA-DR and -DQ β chain N-terminal sequences were prepared in rabbits. The two octapeptides only share two amino acids and enzyme-linked immuno-assays showed the antisera only to bind to its own antigen. Both peptide antisera detected a 29 kDa component in immunoblots of Raji and AL-34 cell plasma membrane proteins separated by SDS gel electrophoresis. The binding of either N-terminal peptide antiserum was selectively inhibited only by the peptide used as antigen. Indirect immunofluorescence.analysis by flow cytofluorometry showed specific surface immunofluorescence in 1:100-1:1000 dilutions in lymphoblastoid and blood mononucleated cells. In the …

Glycation Of Amino Groups In Protein, Nancy G. Watkins, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

Ribonuclease A has been used as a model protein for studying the specificity of glycation of amino groups in protein under physiological conditions (phosphate buffer, pH 7.4, 37 “C). Incubation of RNase with glucose led to an enhanced rate of inactivation of the enzyme relative to the rate of modification of lysine residues, suggesting preferential modification of active site lysine residues. Sites of glycation of RNase were identified by amino acid analysis of tryptic peptides isolated by reverse-phase high pressure liquid chromatography and phenylboronate affinity chromatography. Schiff base adducts were trapped with Na- BH&N and the a-amino group of Lys-1 …

The Azido[14C]Atrazine Photoaffinity Technique Labels A 34-Kda Protein In Scenedesmus Which Functions On The Oxidizing Side Of Photosystem Ii, James G. Metz, Terry M. Bricker, Michael Seibert

Faculty Publications

We have used azido[14C]atrazine to photoaffinity label thylakoids from wild-type (WT) Scenedesmus and a mutant, LF-1, which is blocked on the oxidizing side of photosystem II (PS II). One protein is labeled in each case, at 34 kDa in the WT and 36 kDa in LF-1. Previous comparison of the WT with LF-1 had been used to assign a PS II donor side function to the 34-kDa protein. These results suggest that this photoaffinity technique does not label the herbicide-binding protein involved in electron transfer on the reducing side of PS II. © 1985.

Microbial Degradation Of The Leachable And Lignocellulosic Components Of Leaves And Wood From Rhizophora Mangle In A Tropical Mangrove Swamp, Ronald Benner, Robert E. Hodson

Faculty Publications

Preparations of uniformly [¹⁴C] labeled mangrove leaves and specifically radiolabeled [¹⁴C-lignin] lignocelluloses and [¹⁴C -polysaccharide]lignocelluloses from mangrove leaves and wood were used in experiments to determine the microbial rates of mineralization of the leachable and lignocellulosic components of mangrove detritus in aerobic and anaerobic sediments of a tropical mangrove swamp. The bulk of the leachable fraction from mangrove leaves was mineralized relatively rapidly and was assimilated into microbial biomass with high efficiency (30 %). In contrast, rates of mineralization of the lignocellulosic component of mangrove leaves and wood were 10fold lower than mineralization rates …

In Vitro Propagation Of Dionaea Muscipula, Subhash C. Minocha

Faculty Publications

Surface-sterilized leaf sections from mature Venus fly trap (Dionaea muscipula Ellis) plants produced several adventitious plantlets when cultured on full strength Lin and Staba medium or a reduced strength Murashige and Skoog growth medium supplemented with 0.5-25 μM cytokinin. Zeatin at 9.0 or 22.5 μm was found to be most effective in inducing adventitious shoot formation. These shoots were excised and subcultured on a low salt medium to generate roots. The rooted plants then were transferred to sterilized peat moss and grown to maturity. A large number of plants could be regenerated through repeated subculture of leaf segments.

Uses And Abuses Of Wastewater Injection Wells In Hawaii, F. L. Peterson, June Ann Oberdorfer

Faculty Publications

During the past two decades in Hawaii, more than 500 injection wells for the disposal of domestic sewage wastewater have been constructed and operated. Thus far, contamination of potable groundwater supplies has not been a problem. Many of the injection wells, however, have not performed as designed, and aquifer clogging and reduced injection capacity have produced numerous well failures resulting in public health, legal, and financial problems. Factors most commonly responsible for the well problems have been unfavorable hydrogeology, underdesign of injection well capacity, poor effluent quality, and lack of injection well maintenance. Detailed study of clogging mechanisms in the …

Federal Jurisdiction, Thomas E. Baker

Faculty Publications

No abstract provided.

Evaluating Landowner Assistance Programs And Other Wood Procurement Options, Gary D. Kronrad, C. Franklin, J.E. De Steiquer

Faculty Publications

A major activity of forest industry is supplying their mills with wood. There are four options for wood procurement: fee land, lease land, landowner assistance programs, and open market. The task of the corporate planner is to allocate the limited budget among these options in such a way that the needed volumes of wood are procured at the least cost. A methodology has been developed to aid in this capital budget in process and has been incorporated in an easy-to-use computer program.

All In The Family: Interpersonal Communication In Kin Relationships, Mary Anne T. Fitzpatrick, Diane M. Badzinski

Faculty Publications

No abstract provided.

The Property Rights Paradigm And The Protection Of Oak In California, B. Delworth Gardner

Faculty Publications

Once again our country is caught on the horns of a serious dilemma. Natural resources, such as land and water, are becoming increasingly scarce and therefore valuable. Concomitantly, and perhaps more importantly, these resources are recognized as having attributes or characteristics in the form of amenities that are coveted by non owners of these resources. A cheap and effective way of acquiring these amenities is to assert that the legal owners of the resources do not have the right to exclude those who want the amenities from consuming them. Or, almost equivalently, the resources must be used in certain ways …

Racial Differences In The Relation Of Birth Weight And Gestational Age To Neonatal Mortality, Greg R. Alexander, Mark E. Tompkins, Joan M. Altekruse, Carlton A. Hornung

Faculty Publications

Utilizing South Carolina live birth-infant death cohort files for the period 1975-80, this study examines the bivariate distribution of birth weight gestational age (BW-GA), intrauterine growth curves, and BW-GA specific neonatal mortality rates (NMRs) by race. Comparison of BW-GA distributions revealed an appreciable shift between racial subgroups. Nonwhites, on the average, were born 1 week earlier and 270 grams lighter in weight than whites. In addition to racial differences in rates of intrauterine growth, nonwhites experienced lower BW-GA NMRs than whites in BW-GA categories < 3,000 grams and < 38 weeks. However, the improved mortality experience of nonwhites at more immature BW-GA categories was not consistently present when different cause-specific NMRs were considered.

These persistent racial variations highlight continuing issues regarding both the use of a single norm for …

Containment Strategies For Marine Oil Spills In Nearshore Waters., E. H. Owens, H. H. Roberts, S. P. Murray, C. R. Foget

Faculty Publications

No abstract provided.

Barriers To Adoption Of Special Needs Children: A National Study, James G. Mccullagh

Faculty Publications

This exploratory study analyzed the incidence and nature of barriers experienced by applicants wishing to adopt special needs children; defined as: "children who are older; have physical disabilities; are emotionally troubled; or are mentally retarded. Many are Black or Hispanic. Some are brothers and sisters who need a home together." Between mid-January and the end of June 1984; approximately 13;000 questionnaires were mailed to affiliates of the North American Council on Adoptable Children (NACAC); foster parents associations; and other groups and individuals. Usable surveys were returned by 535 respondents; of whom 55.7 percent were identified as having experienced a homestudy …

Dependence Of Fishery Species On Salt Marshes: The Role Of Food And Refuge, Donald F. Boesch, R. Eugune Turner

Faculty Publications

Salt marshes are widely believed to serve as nurseries for many fishes and crustaceans of fishery value as a result of the high production of vascular plant detritus and the protection from predation offered by shallow, spatially complex habitats. Comparisons of the yields of species which reside in salt marsh habitats during critical life history stages (such as penaeid shrimp) with the area of such habitats and their greater densities in flooded marshes and associated tidal creeks support the premise that marshes enhance the yield of such species. A range of evidence, including the amount of detrital export from marshes, …

The Gyroscope Test Of Relativity, B. M. Barker, R. F. O'Connell

Faculty Publications

No abstract provided.

Characterization Of Glycated Proteins By 13C Nmr Spectroscopy, Carolyn I. Neglia, Helga J. Cohen, Albert R. Garber, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

13C NMR spectroscopy has been used to characterize Amadori (ketoamine) adducts formed by reaction of [2-13C]glucose with free amino groups of protein. The spectra of glycated proteins were acquired in phosphate buffer at pH 7.4 and were interpreted by reference to the spectra of model compounds, N alpha-formyl-N epsilon-fructose-lysine and glycated poly-L-lysine (GlcPLL). The anomeric carbon region of the spectrum (approximately 90-105 ppm) of glycated cytochrome c was superimposable on that of N alpha-formyl-N epsilon-fructose-lysine, and contained three peaks characteristic of the alpha- and beta-furanose and beta-pyranose anomers of Amadori adducts to peripheral lysine residues on protein (pK alpha approximately …

George Orwell: Socialist Or Liberal?. Big Brother And The Abuse Of Power., Noel B. Reynolds

Faculty Publications

For although he was too strongly independent in his thinking to accept the Marxist or socialist dogmas of his associates, because they did not seem to square with experience, and though he admired the tough resistance of English character and legal institutions to tyranny, Orwell never did tumble to the understanding of man and government which had shaped each over the centuries. Failing to see the constants in human nature as the key to the political problem, he looked around the world both as he perceived it and his literary fellows portrayed it, and concluded that power lust was the …

Some Plant Leaves Have Orientation-Dependent Epr And Nmr Spectra, Douglas C. Mccain, Ted C. Selig, Govindjee, John L. Markley

Faculty Publications

Proton nuclear magnetic resonance (¹H NMR) spectra of leaves from 50 plant species were obtained at a spectrometer frequency of 470 MHz. Water present in leaf samples gives rise to characteristic spectral patterns. Most species show only one broad ¹H NMR peak; however, the leaves of some plants display complex, orientation-dependent spectra in which a common three-line pattern is discerned. The pattern varies with the angle between the leaf surface and the external magnetic field. Proton relaxation measurements show the presence of at least two water compartments in the leaves. The compartments are responsible for different components …

Estimation Of Body Density In Adolescent Athletes, W G. Thorland, G O. Johnson, G D. Tharp, T J. Housh, C J. Cisar

Faculty Publications

National samples of 141 male and 133 female highly-trained adolescent athletes were studied to derive anthropometric-based equations predicting body density. Anthropometric measures included skinfold thicknesses at seven sites, circum- ferences at 14 sites, and diameters at nine sites. Criterion measures of body density were determined by underwater weighing with corrections for residual lung vol- ume based on the oxygen dilution method. Variable selection procedures included factor analysis followed by forward-stepping regression and polynomial analysis. For both the male and female samples, two quadratic equations utilizing either the sum of three or seven skinfold measures were derived. Within the male sample, …