Digital Commons Network^™

Phenanthrene Adsorption And Desorption By Melanoidins And Marine Sediment Humic Acids, John Andrew Terschak

Oceanography

Sediments are major reservoirs of persistent petroleum contamination in marine environments. Petroleum hydrocarbons associate with the sediment organic matter, of which humic acids are an important constituent. This study examined the role that humic acid and its structure plays in the kinetics and mechanisms of polycyclic aromatic hydrocarbon (PAH) interactions with sediments. Natural humic acids, with a wide range of properties, were isolated from Alaska coastal marine sediments. Melanoidins were synthesized and used as humic acid analogs. The humic acids were characterized by elemental and isotopic analyses, Fourier transform infrared spectroscopy, and cross-polarized magic angle spinning 13C nuclear magnetic resonance …

Gender Of Perpetrator, Gender Of Victim, And Relationship Between Perpetrator And Victim As Factors Influencing How Adults View Coercive Sexual Behavior In Childhood, Rebecca Lynn Bosek

Psychology

The sexual abuse of children by adults is a serious social problem. Some sexually abused children become sexually abusive toward others. This is sometimes called coercive sexual behavior, and little is known about how adults view these acts. A better understanding of how adults view coercive sexual behavior between children is critical due to the harm it causes victims, perpetrators, and society. Also, parents are typically held legally responsible for their minor children, and it is their responsibility to intervene in this type of behavior. Three hundred and eighty-five college students participated in a study that examined descriptions of coercive …

Variability Of Pink Salmon Family Size Has Implications For Conservation And Management Models, Harold Joseph Geiger

Fisheries

In several populations of pink salmon, the short-term dynamics population size was related to both the mean and variance of individual family sizes, because not all families were equally productive. In the marine lifestage, population increases came disproportionately from the most productive families, especially in populations with the highest average marine survival. Moreover, the trait of marine survival itself had a statistically detectable genetic component. This implies that the most favored phenotypes change from generation to generation, and that the marine environment is unpredictable and changing. These results, together with laboratory studies of freshwater survival and measurements of wild pink …

The Role Of Copepods In The Distribution Of Hydrocarbons: An Experimental Approach, Switgard Duesterloh

Fisheries

Copepods may provide a significant pathway for the concentration and transfer of polyaromatic compounds (PAC) to higher trophic level consumers. PAC dissolved from weathered crude oil are more persistent in the environment and have much higher toxicity than the lighter, more volatile fractions of crude oil. Because of their polarity, PAC tend to accumulate in bio-lipids. Subarctic copepod species can contain up to 80% of their body dry weight in lipids and have a high surface area to volume ratio. Thus, PAC accumulation is rapid and bioaccumulation factors are in the order of 500--8000, depending upon species and lipid content. …

Daily Eastern News: April 17, 2002, Eastern Illinois University

April

No abstract provided.

Director Of The Land Institute To Give Earth Day Speech, Deborah Purnell

University of Mississippi News

UNIVERSITY, Miss. -- Reduce chemical use, increase soil productivity and promote a healthy environment -- all are messages for Earth Day April 22 at the University of Mississippi (UM).

Mississippi High School Students Head To International Science Fair After Wins, Angela Moore

University of Mississippi News

UNIVERSITY, Miss. -- More than 700 students entered, but only four Mississippi high school students advance after taking top honors in the recent 53rd Annual Science and Engineering Fair at the University of Mississippi (UM).

Uas Academic Catalog 2002/2003, N/A N/A

UAS Academic Catalogs (1988/89-2010/11)

No abstract provided.

Modeling Of The Fisheries Acoustics Problem, Barbara Leigh Adams

Theses (Unassigned)

This dissertation presents a mathematical model of the overall fisheries acoustics problem posed by enumeration of fish populations using sonar. Emphasis is placed on three key components: a new geometric model for the target strength (TS) of Pacific salmon, a fish distribution for sockeye salmon, and generation of artificial sonar data. Results of the TS and fish distribution models show TS varies on height and breadth of fish as much as on fish length and TS from the air-filled swimbladder is the major contributor as reported by Foote [1985]. A fish roll factor within 45° leads to TS variations within …

Molecular Mechanisms Of Metabolic Control In The Arctic Ground Squirrel, Jamie Louis Barger

Theses (Unassigned)

The annual cycle of the arctic ground squirrel (Spermophilus parryii) is characterized by periods of intense energy deposition and utilization, and therefore this species an attractive model for investigating the molecular mechanisms of metabolic control in mammals. In late summer, animals become hyperphagic and undergo intense fattening prior to hibernation. Leptin, a hormone produced by white adipose tissue, reverses obesity in rodent genetic models, but the effects of leptin on outbred rodent strains and wild species is modest. Similarly, administration of mouse recombinant leptin did not affect food intake or adiposity during prehibernation fattening in arctic ground squirrels. These results …

Constructed Wetlands For Wastewater Treatment In The Subarctic, David Charles Maddux

Theses (Unassigned)

This research had two basic objectives: to assess the capability of macrophytes indigenous to the subarctic in removal of heavy metals from wastewater and to determine the feasibility of using constructed wetlands for sewage wastewater treatment in a subarctic environment with a focus on rural application. The research consisted of two parts: a greenhouse study in which indigenous macrophytes were subjected to heavy metal pollutants similar to those found in roadway runoff and a constructed wetland built to treat sewage wastewater. Five species of plants were tested in both projects: Arctophila fulva, Carex rhynchophysa, Menyanthes trifoliate, Scirpus validus and Typha …

A Comparative Analysis Of Mhc Genetic Diversity At The Class Ii Loci In Some Arctic Mammalian Species, Zhengyu Wei

Theses (Unassigned)

The genetic diversity at the Major Histocompatibility Complex (MHC) class II loci in some arctic mammalian species, musk ox, moose, caribou, and bears, have been characterized. The general objective of this study was to broaden the knowledge of the MHC polymorphism, selection, evolution and function in natural populations of arctic mammals. Allelic variation was assessed by analysis of MHC class II DR and DQ loci at exon 2 region. Sequences were amplified via the polymerase chain reaction (PCR), followed by either DNA sequencing after cloning of the PCR products or single-stranded conformation polymorphism (SSCP) analysis and sequencing. Monomorphism was observed …

Tracing Amino Acid Metabolism Of Harbor Seals (Phoca Vitulina) Using Stable Isotope Techniques, Liying Zhao

Marine Biology

Compound specific isotope techniques were used to trace amino acid metabolism in captive harbor seals (Phoca vitulina) through a two-year controlled feeding trial with either Pacific herring (Clupea pallasi ) or walleye pollock (Theragra chalcogramma). Techniques were developed for measuring carbon and nitrogen isotope ratios of individual amino acids. Carbon and nitrogen trophic enrichments in serum of captive harbor seals varied with the two fish diets, which might have resulted from the changes in metabolic pathway due to the differing dietary protein intake between herring and pollock. Data on serum free amino acid compositions also showed, from a different perspective, …

Carbon And Nitrogen Flows In Zero-Water Exchange Shrimp Culture: Inferences Using Stable Isotope Tracers, Michelle A. Epp

Marine Biology

Nutrient and energy flow in cultures of Pacific White Shrimp, Litopenaeus vannamei, were examined in zero-water exchange, 1200--1300 L mesocosms at the Oceanic Institute (OI), Waimanalo, Hawaii. A technique was developed for monitoring shrimp use of formulated feeds through the addition of stable isotopically labeled nutrients to the feed ingredients. Crystalline amino acid compounds were ineffective as labels due to their rapid dissolution in the tank water with feed pellet break-up. Labels which were 'packaged' as algal cells prior to addition to the feed pellets were more effectively incorporated into shrimp tissues than crystalline label (approximately 27% versus 8% for …

Sponges Dominant In The Alaska Intertidal: Biology, Ecology, And Genetic Diversity, Ann Lynette Knowlton

Marine Biology

The role of the sponge, Halichondria panicea, in a Kachemak Bay, Alaska, intertidal community was investigated through field and laboratory experiments. The relationship between H. panicea and co-occurring macroalgae was studied and results indicate that removing macroalgae had no effect on sponge abundance. A laboratory feeding trial investigating H. panicea and its primary predator Archidoris montereyensis showed that nudibranchs consuming symbiotic sponge had higher feeding and egg production rates than individuals eating aposymbiotic sponge. In a simulated predation event, initial sponge growth rates into experimental feeding scars were high, indicating a response mechanism to tissue damage. A naturally occurring high …

Oceans, Watersheds And Humans: Facts, Myths And Realities, Henry Huntington, Steve Colt

ISER Reports

Alaskans expect a great deal from their oceans and watersheds. Commercial fishing, sport fishing, subsistence hunting, recreation, offshore oil and gas development, transportation, and tourism are among the many ways the oceans, coast, watersheds, and their resources are used. These activities, however, can strain or break the capacity of the ecosystem to sustain them and they are not always compatible. Conflicts and controversies between different user groups are increasingly common. The role of societal forces in shaping the human-aquatic relationship is often under-appreciated, but can be critical. Protecting the health of Alaska’s oceans and watersheds requires managing the interactions between …

Long-Term Outlook For Salmon Returns To Alaska, Bruce Finney, Milo Adkison

ISER Reports

With the exception of some western Alaska stocks, Alaska's salmon populations are numerically healthy. However, even fisheries on abundant stocks are suffering economically due to sharp declines in the value of the catch. The abundance of Alaskan salmon stocks has fluctuated greatly, both in modern times and prehistorically. These fluctuations are thought to be caused by multi-decadal changes in environmental conditions over large areas that affect many other species as well as salmon. Forecasts of salmon returns are not very reliable, and the potential for significant improvement in their accuracy is low in the short term. A viable fishing industry …

Measuring The Sense Of Community In A Magnet School, Marianne Dell

Theses and Dissertations

The purpose of this study was to measure covenantal climate within a magnet high school, and to determine if specific professional development (Project SPARC) enhanced staff commitment to the magnet school's focus. The Royal and Rossi Measures of Sense of Community were administered in the form of a questionnaire to all staff within the school both before and after Project SPARC was offered as a professional development program during the summer of 2001.

The questionnaires consisted of sixty-four statements requiring Likert-type responses. Data were grouped according to length of respondent membership on the staff of the school as well as …

The Guardian, April 17, 2002, Wright State University Student Body

The Guardian Student Newspaper

Twenty-four page issue of The Guardian, the official student-run newspaper for Wright State University. The Guardian has been published regularly since March of 1965.

Ke Alaka'i, Vol. 65, No. 52 (2002-04-17), Brigham Young University Hawaii

Ke Alaka'i

No abstract provided.

The Knight News Volume 12: Issue 8, Nova Southeastern University

Student Newspapers

No abstract provided.

Campus Observer, Volume 3, Issue 7, Office Of University Communications, Florida Institute Of Technology

Campus Observer

The Campus Observer was a newsletter for the Florida Tech community produced by the Office of University Communications (now the Office of Marketing and Communications). Visit the Campus Observer Collection Guide for more information. Earlier publications of this kind include Tech Talk and Technology Topics.

The Bg News April 17, 2002, Bowling Green State University

BG News (Student Newspaper)

The BGSU campus student newspaper. April 17, 2002. Volume 89-Issue 59.

Cdc5 Influences Phosphorylation Of Net1 And Disassembly Of The Rent Complex., Wenying Shou, Ramzi Azzam, Susan L. Chen, Michael J. Huddleston, Christopher Baskerville, Harry Charbonneau, Rolan S. Annan, Steve A. Carr, Raymond J. Deshaies

Department of Biochemistry Faculty Publications

Background

In S. cerevisiae, the mitotic exit network (MEN) proteins, including the Polo-like protein kinase Cdc5 and the protein phosphatase Cdc14, are required for exit from mitosis. In pre-anaphase cells, Cdc14 is sequestered to the nucleolus by Net1 as a part of the RENT complex. When cells are primed to exit mitosis, the RENT complex is disassembled and Cdc14 is released from the nucleolus.

Results

Here, we show that Cdc5 is necessary to free nucleolar Cdc14 in late mitosis, that elevated Cdc5 activity provokes ectopic release of Cdc14 in pre-anaphase cells, and that the phosphorylation state of Net1 is …

Neural-Network Modeling Of Placer Ore Grade Spatial Variability, Jinchuan Ke

Engineering

Traditional geostatistical methods have been used in ore reserve estimation for decades. Research in the last two decades or so has added a number of other statistical methodologies for ore reserve estimation procedures. Recent advances in neural networks have provided a new approach to solve this problem. This thesis is focused on the Neural-network modeling for the estimation of placer ore reserve. Due to the spatial variability, multiple dimensional inputs and very noisy drill hole sample data from the selected region, it requires that the neural-network be organized in a multiple-layers to handle the non-linearity and hidden slabs for smoothing …

Honors Convocation (Program 2002), Illinois Wesleyan University

The Kemp Foundation's Teaching Excellence Award Ceremony Programs

No abstract provided.

April 17, 2002, The Daily Mississippian

Daily Mississippian (all digitized issues)

No abstract provided.

Phylogeography And Population Genetic Structure Of Beringian Landbirds, Christin Leigh Pruett

Biological Sciences

Molecular genetic approaches can be used to evaluate the historic and current relationships among populations. Mitochondrial DNA sequences and nuclear microsatellite loci were used to examine questions in avian community ecology, biogeography, and population genetics, including: (1) how have simple, high latitude bird communities been historically assembled; (2) how have past climate changes affected a species that has its entire distribution in an area that has experienced many glacial cycles; and (3) what are the genetic effects of sequential peripheral isolation in a natural vertebrate system? Landbird communities in the Aleutian Islands are simple and replicated, having only eight members. …

Minutes, April 16, 2002

Agendas and Minutes

No abstract provided.

Patterns Of Avifauna Use Of Constructed Wetlands In The Beaver Creek Wetland Complex, Menifee County, Kentucky, Michael E. Kenawell

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science and Technology at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Michael E. Kenawell on April 16, 2002.