Digital Commons Network^™

Effects Of Fall Fertilizer Applications Of Mitotic Index And Bud Dormancy Of Loblolly Pine Seedlings, Hans Michael Williams, David B. South

Faculty Publications

A series of studies examined the effects of fall fertilization with diammoniwn phosphate (DAP) on mitotic index and bud donnancy [as measured by mean days to budbreak (DBB)] of two half-sib seed sources of loblolly pine. The first study tested different rates of DAP (0, 67, and 202 kg Nlha), the second study compared DAP with ammoniwnnitrate, and the third study examined the effect of different application dates (September 28, October 19, and November 9). An increase in mitotic index of unfertilized seedlings was observed during October and was due to developmental activity which follows initial budset. Differences in mitotic …

Pine Tip Moth (Lepidoptera: Tortricidae) Infestation Rates As Influenced By Site And Stand Characteristics In Loblolly Pine Plantations In East Texas, James R. Meeker, David Kulhavy

Faculty Publications

Three young loblolly pine plantations grown on contrasting soil types produced quantitatively and qualitatively different host material for pine tip moths during 1985 and 1986. Amounts, periodicity, and availability of soil moisture regulated internal moisture conditions within host trees. Host xylem moisture potential in conjunction with soil nutrient status governed tree growth and influenced pine tip moth infestation rates.

Pines on a sandy site exhibited the poorest growth with lowest infestation rates, indicative of low-quality hosts with little if any tolerance to damage. A clayey site produced vigorous plant growth with moderate infestation rates. The less apparent hosts appeared capable …

Seasonal Response Of Slash Pine (Pinus Elliottii Var. Elliottii Engelm.) Photosynthesis To Long‐Term Exposure To Ozone And Acidic Precipitation, David P. Byres, Jon D. Johnson, Thomas J. Dean

Faculty Publications

Four half‐sib families of slash pine (Pinus elliottii var. elliottii) were planted in open‐top chambers and exposed to ozone and simulated acidic precipitation (3: 7 molar ratio of nitric and sulphuric acids). The 4 ozone treatments were (1) charcoal‐filtered air, (2) unfiltered ambient air, (3) twice ambient and (4) three times ambient ozone, with treatments applied 12 h per day, 11 months per year for 28 months. Seedlings were irrigated weekly with one of three rain acidities: pH 33, 4.3 or 5.3 at a total rainfall equivalent of 133 cm per year. Photosynthetic rates were measured approximately every 10 weeks, …

Long‐Term Effects Of Ozone And Simulated Acid Rain On The Foliage Dynamics Of Slash Pine (Pinus Elliottii Var. Elliottii Engelm.), David P. Byres, Thomas J. Dean, Jon D. Johnson

Faculty Publications

Seedlings from four half‐sib families of Pinus elliottii var. elliottii Engelm. were planted in open‐top chambers, and exposed to ozone and simulated acidic precipitation. Treatments were applied for 11 months per year for 28 months. The ozone concentrations were: charcoal filtered air (CF), nonfiltered ambient air (1×), twice the nonfiltered level (2 ×) and three times the nonfiltered level (3 ×). Ozone exposures were computer controlled to follow natural diurnal fluctuations in ambient ozone concentrations. Simulated acid rain at pH 3.3, 4.3 or 5.3 was delivered weekly at the same volume as average weekly rainfall to all chambers. Leaf area, …

The Mississippian Emergence - Smith, Bd, H. Edwin Jackson

Faculty Publications

No abstract provided.

Collection Development Policy: Academic Library, St. Mary's University, Margaret Sylvia

Faculty Publications

A revised edition of the original collection development policy for the Academic Library (now the Louis J. Blume Library) published in ERIC. This guide spells out the collection development policy of the library of St. Mary's University in San Antonio, Texas. The guide is divided into the following five topic areas: (1) introduction to the community served, parameters of the collection, cooperation in collection development, and priorities of the collection; (2) considerations in collection development, including maintaining the collection, gifts, bibliographic instruction, circulation, and intellectual freedom; (3) selection of materials, including responsibility for selection, selection aids, and criteria for selection …

Legal Education And The Theatre Of The Absurd: "Can't Anybody Play This Here Game?", Paul A. Lebel

Faculty Publications

No abstract provided.

Time-Courses In The Retention Of Food Material In The Bivalves Potamocorbula Amurensis And Macoma Balthica: Significance To The Absorption Of Carbon And Chromium, Alan W. Decho, Samuel N. Luoma

Faculty Publications

Time courses for ingestion, retention and release via feces of microbial food was investigated using 2 bivalves with different feeding strategies, Potamocorbula amurensis, and Macoma balthica. The results showed 2 pathways for the uptake of food material in these clams. The first is represented by an initial label pulse in the feces. The second pathway operates over longer time periods. Inert ⁵¹Cr-labeled beads were used to determine time frames for these pathways. The first pathway, involving extracellular digestion and intestinal uptake, is relatively inefficient in the digestion of bacterial cells by P. amurensis but more efficient in …

Formation Of Pentosidine During Nonenzymatic Browning Of Proteins By Glucose, Daniel G. Dyer, James A. Blackledge, Suzanne R. Thorpe, John W. Baynes

Faculty Publications

A fluorescent compound has been detected in proteins browned during Maillard reactions with glucose in vitro and shown to be identical to pentosidine, a pentose- derived fluorescent cross-link formed between arginine and lysine residues in collagen (Sell, D. R., and Monnier, V. M. (1989) J. Biol. Chem. 264, 21597- 2 1602). Pentosidine was the major fluorophore formed during nonenzymatic browning of ribonuclease and lysozyme by glucose, but accounted for <1% of nondisulfide cross-links in protein dimers formed during the reaction. Pentosidine was formed in greatest yields in reactions of pentoses with lysine and arginine in model systems but was also formed from glucose, fructose, ascorbate, Amadori compounds, 3-deoxyglucosone, and other sugars. Pentosidine was not formed from peroxidized polyunsaturated fatty acids or malondialdehyde. Its formation from carbohydrates was inhibited under nitrogen or anaerobic conditions and by aminoguanidine, an inhibitor of advanced glycation and browning reactions. Pentosidine was detected in human lens proteins, where its concentration increased gradually with age, but it did not exceed trace concentrations (55 Fmol/mol lysine), even in the 80-year-old lens. Although its precise carbohydrate source in vivo is uncertain and it is present in only trace concentrations in tissue proteins, pentosidine appears to be a useful biomarker for assessing cumulative damage to proteins by nonenzymatic browning reactions with carbohydrates.

Decrease In Skin Collagen Glycation With Improved Glycemic Control In Patients With Insulin-Dependent Diabetes Mellitus, Timothy J. Lyons, Karen E. Bailie, Daniel G. Dyer, John A. Dunn, John W. Baynes

Faculty Publications

Glycation, oxidation, and nonenzymatic browning of protein have all been implicated in the development of diabetic complications. The initial product of glycation of protein, fructoselysine (FL), undergoes further reactions, yielding a complex mixture of browning products, including the fluorescent lysine-arginine cross-link, pentosidine. Alternatively, FL may be cleaved oxidatively to form N(epsilon)-(carboxymethyl)lysine (CML), while glycated hydroxylysine, an amino-acid unique to collagen, may yield N(epsilon)-(carboxymethyl)hydroxylysine (CMhL). We have measured FL, pentosidine, fluorescence (excitation = 328 nm, emission = 378 nm), CML, and CMhL in insoluble skin collagen from 14 insulin-dependent diabetic patients before and after a 4-mo period of intensive therapy to …

Sensitivity Of Frost Resistance And Growth In Citrus And Avocado To Chronic Ozone Exposure, D. M. Eissenstat, J. P. Syvertsen, T. J. Dean, G. Yelenosky, J. D. Johnson

Faculty Publications

The effects of elevated levels of ozone on growth and frost resistance were studied using broadleaf‐evergreen citrus and avocado trees. ‘Ruby Red’ grapefruit (Citrus parodist L.) trees on either Volkamer lemon (Citrus volkanieriana Ten. & Pasq.) or sour orange (Citrus aurantium L.) rootstocks and ‘Simmonds’ or ‘Pancho’ avocado trees (Persea americana Mill.) on the rootstock ‘Waldin’ were exposed to ozone in open‐top chambers for 4 months in 1988 and for 8 months in a second experiment in 1989. The ambient ozone concentration, averaged over a 12 h day, was 30‐1 nl 1−1 in 1988 and 39‐1 nl 1−1 in 1989 …

Computer-Simulated Evaluation Of Possible Mechanisms For Quenching Heavy Metal Ion Activity In Plant Vacuoles: I. Cadmium, Jian Wang, Bill P. Evangelou, Mark T. Nielsen, George J. Wagner

Faculty Publications

Various mechanisms have been suggested for the quenching of Cd ion activity in plant vacuoles. These include solution complexation with organic acids and sulfhydryl-containing peptides and precipitation as sulfides. Because direct experimental support for these mechanisms is lacking and difficult to obtain, we have used a computer model to evaluate the quenching role of possible organic and inorganic ligands of tobacco cultured cells exposed to Cd. Results of this thermodynamic evaluation, which assumes that a chemical equilibrium state is met in the vacuole, support the conclusion that sulfhydryl-containing peptides and certain organic acids may form soluble Cd complexes. Although complexation …

Sex, Drugs, Pregnancy, And The Law: Rethinking The Problems Of Pregnant Women Who Use Drugs, Michelle Oberman

Faculty Publications

No abstract provided.

Time For A New Law On Health Care Advance Directives, George J. Alexander

Faculty Publications

No abstract provided.

Below The Magic Mountain: A Social History Of Tuberculosis In 20th Century Britain, L. Margaret Barnett

Faculty Publications

©Albion

Publisher's Version

Teaching In A Liberal Arts College: How Foreign Language Courses Contribute To "Writing Across The Curriculum" Programs, Ilona Klein

Faculty Publications

This essay shares some thoughts about the need for interaction between foreign language instructors and English teachers, both in high schools and at the university level. As a foreign language teacher for the past nine years (the last four in a liberal arts college), I have encountered several problems and difficulties that could be overcome, I believe, if English, Writing, and Foreign Language departments addressed them together. I do not claim to be able to give definite answers, since many pedagogical concepts concerting L2 acquisition/learning and their possible application to writing programs remain misunderstood or are presently debated by teacher …

Dietary Protein Deficiency And Mycobacterium Bovis Bcg Affect Interleukin-2 Activity In Experimental Pulmonary Tuberculosis, David N. Mcmurray, C. L. Mintzer, R. A. Bartow, Rebecca D. Parr

Faculty Publications

Inbred strain 2 guinea pigs were vaccinated with Mycobacterium bovis BCG or were left unvaccinated. They were maintained for 6 weeks on defined, isocaloric diets containing either 30% (control animals) or 10% (animals receiving low protein) ovalbumin as the sole protein source. Animals were challenged by the respiratory route with a low dose of virulent M. tuberculosis H37Rv and killed 4 weeks later. Protein-malnourished animals were not protected by previous vaccination with BCG. Lymphocytes isolated from various tissues were tested in vitro for proliferative responses to mitogen (concanavalin A) and antigen (purified protein derivative [PPD]), production of interleukin-2 (IL-2), and …

Site/Stand Factors Influencing Nantucket Pine Tip Moth In Loblolly Pine Plantations, David Kulhavy, W. G. Ross, James R. Meeker, W. David Tracey

Faculty Publications

Tip moth infestation and loblolly pine growth were examined on sandy, loamy and clayey sites in 2-3 year old plantations. Infestations were greatest on loamy sites. Following fertilizer and herbicide applications, tip moth infestations were lowest on fertilized plots following application of phosphorus.

The State's Interest In The Preservation Of Life: From Quinlan To Cruzan, Philip G. Peters Jr.

Faculty Publications

This article considers the kinds of limits on withholding that each of these policies might plausibly support, compares these limits to the judicial approaches taken in the refusal of treatment cases, and explores how apparent conflicts between these state goals and the interests of the patients might be resolved. Because this article focuses exclusively on the state's interests, however, it necessarily isolates and considers only one portion of a complex problem involving the interests of patients, families, providers, and others. No comprehensive examination of the nature and weight of the patient's interests or those of other involved parties is attempted. …

Age-Based Rationing And Technological Development, Maxwell J. Mehlman

Faculty Publications

Comment on Daniel Callahan's "Setting Limits."

Comparison Of Ascorbic Acid Content Of Super‐Market Versus Roadside Stand Produce, R. J. Bushway, P. R. Helper, J. King, B. Perkins, M. Krishnan

Faculty Publications

Seven vegetables and one fruit from two roadside stands and two major local supermarkets were analyzed for their ascorbic acid content. Produce was sampled during a nine week period from late July through September of 1987. Significant differences at the 0.05 level for ascorbic acid were observed between supermarket and roadside stand produce for potato, cauliflower, cabbage and tomato while no significant differences were found between cantaloupe, broccoli, green peppers and spinach from either market. Cabbage was the only supermarket item that was significantly higher in ascorbic acid concentration. Very little dehydroascorbic acid was shown to be present in these …

Using The Lnformation Resources Of The Global Village: The Information Systems Of International Inter-Governmental Organizations, Robert V. Williams

Faculty Publications

No abstract provided.

How Do Harpacticoid Grazing Rates Differ Over A Tidal Cycle? Field Verification Using Chlorophyll-Pigment Analyses, Alan W. Decho

Faculty Publications

Four species of meiobenthic copepods were examined for diatom feeding. Microscopic analysis of gut-pellet contents from field-collected individuals indicated frequent ingestion of diatoms by 3 harpacticoids (Scottolana canadensis, Microarthridion littorale, Cletocamptus deitersi) while occasional diatom ingestion occurred Paronychocamptus huntsmani. Frustules were usually empty and broken, indicating that contents were digested. Laboratory experiments using ¹⁴C-labeling showed assimilation of diatoms by the 3 species examined. Field grazing rate studies were conducted over different portions of a tidal cycle using fluorescent chlorophyll-pigment analysis of gut-contents. Highest diatom consumption (p<0.05) occurred just after the mudflat became exposed (i.e. Early Low Water level, ELW) for S. canadensis, while consumption at Late Low Water …

Ribosomal Protein Synthesis Is Not Regulated At The Translational Level In Saccharomyces Cerevisiae: Balanced Accumulation Of Ribosomal Proteins L16 And Rp59 Is Mediated By Turnover Of Excess Protein., Y. F. Tsay, J. R. Thompson, M. O. Rotenberg, J. C. Larkin, J. L. Woolford

Faculty Publications

We have investigated the mechanisms whereby equimolar quantities of ribosomal proteins accumulate and assemble into ribosomes of the yeast Saccharomyces cerevisiae. Extra copies of the cry1 or RPL16 genes encoding ribosomal proteins rp59 or L16 were introduced into yeast by transformation. Excess cry1 or RPL16 mRNA accumulated in polyribosomes in these cells and was translated at wild-type rates into rp59 or L16 proteins. These excess proteins were degraded until their levels reached those of other ribosomal proteins. Identical results were obtained when the transcription of RPL16A was rapidly induced using GAL1-RPL16A promoter fusions, including a construct in which the entire …

Divergence Of The Recent Trends In Coronary Mortality For The Four Major Race-Sex Groups In The United States, C. Sempos, R. Cooper, M. G. Kovar, M. Mcmillen

Faculty Publications

Since 1976 there has been a leveling off or slowdown in the rate of decline in coronary heart disease (CHD) mortality. The age-adjusted absolute annual rate of decline in CHD mortality rates during 1968-75 (Δ rate/100,000 population/year) was virtually identical for White males (-7.54), Black males (-7.85), and Black females (-7.20), and somewhat lower for White females (-4.25). During 1976-85, however, the secular trends diverged considerably. Age-adjusted rates continued to decline at the same annual rate for White males, while the decline was approximately half as steep for the other three race-sex groups. During 1976-85 there was also a leveling …

Protein Solubility, In Vitro Ammonia Concentration, And In Situ Disappearance Of Extruded Whole Cottonseed And Other Protein Sources, J. A. Stutts, W. A. Nipper, R. W. Adkinson, J. E. Chandler, A. S. Achacoso

Faculty Publications

Whole cottonseed extruded at temperatures (°C) and rates (kg/h) of 131, 314; 135, 182; 146, 195; and 156, 286 was evaluated by protein solubility, in vitro ammonia concentration, and in situ disappearance techniques. These techniques were used to estimate potential of extruded whole cottonseed for protein escape from the rumen. In addition, raw whole cottonseed, soybean meal, corn gluten meal, and whole cottonseed and soybean meal heated for 4 h at 127, 138, and 149°C were used for comparison. Solubility was by three methods: cold water mixed for 30 min, cold water homogenized for 5 s, and hot water refluxed …

Withdrawal Of Life Support: Individual Autonomy Against Alleged State Interests In Preserving Life, Michelle Oberman

Faculty Publications

No abstract provided.

Economics Of Agricultural Development In Tropical Africa By Seth La-Anyane, Mark W. Delancey

Faculty Publications

No abstract provided.

Structure And Expression Of The Saccharomyces Cerevisiae Cry1 Gene: A Highly Conserved Ribosomal Protein Gene, J. C. Larkin, J. R. Thompson, J. L. Woolford

Faculty Publications

No abstract provided.

The Effect Of Salt Concentration On Auxin Stability In Culture Media, James R. Dunlap, Stephen Kresovich, Robert E. Mcgee

Faculty Publications

The concentrations of indole-3-acetic acid (IAA), naphthaleneacetic acid (NAA) and 2,4-dichlorophenoxyacetic acid (2,4-D) were followed for 35 days in cell-free liquid medium containing 100, 50, or 0% Murashige-Skoog (MS) salt base. Although the concentrations of NAA or 2,4-D remained constant the level of IAA decreased to only 11% of the original concentration after 35 days in the presence of 100% MS salt base. The observed rate of IAA degradation was accelerated by the presence of MS salts.