Digital Commons Network^™

Anti-Conservation Incentives, Jonathan H. Adler

Faculty Publications

Several recent empirical studies have indicated that the Endangered Specifies Act (ESA) discourages species conservation on private land. This is because the law encourages landowners to shoot, shovel and shut up before federal authorities discover the species are present or may move onto the land. Most worrisome, the studies suggest that the net effect of the ESA on private land could be negative. Habitat loss and fragmentation represent the greatest threat to endangered species because private land is indispensable to environmental conservation.

Frequency Of Abnormal Pap Smears And Assessment Of Risk Factors For Cervical Cancer In An Out-Patient Clinic, Firdous Jahan, Naheed Nabi, Waris Qidwai, Iqbal Azam

Department of Family Medicine

No abstract provided.

Oncolog Volume 53, Number 10, October 2008, Joe Munch, Sunita Patterson

OncoLog MD Anderson's Report to Physicians (All issues) Archives

• Pancreatic Cancer: The Prognosis Is Changing
• Delivering “The Guardian of the Genome”
• House Call: “Seeing” Cancer from the Outside
• Catching Pancreatic Cancer Early

Agricultural Certifications And Beekeeping: Lessons From An Apicultural Cooperative In Northeastern El Salvador, Central America, Jason Andrew Seagle

Graduate Student Theses, Dissertations, & Professional Papers

Beekeeping, and especially the production and sale of honey, is an on-farm diversification strategy that has significance to rural livelihoods in some of the most economically and environmentally marginalized regions of the world. Beekeeping also supports sustainable agriculture since it requires that vegetation and forest cover remain intact. However, the limited resources of beekeepers, including marketing constraints, make it difficult for them to realize the full value of their beekeeping enterprises. This professional paper focuses on the Eco-Morazán Cooperative in El Salvador as a case study to examine the costs, benefits and market potential of three types of certification schemes: …

Uri Undergraduate And Graduate Course Catalog 2008-2009, University Of Rhode Island

URI Course Catalogs Archive

No abstract provided.

Interagency Science And Research Strategy, Limnological Assistance For Lake Mead National Recreation Area

Limnological Studies

Helping improve operational efficiency, enhance land stewardship, resource protection, and conservation on the shared public land.

Optimal Foraging Theory And Early Archaic Plant Use At North Creek Shelter, Sara C Hill

UNLV Retrospective Theses & Dissertations

Optimal Foraging Theory has received considerable intellectual criticism since its use as an archaeological tool for understanding human behavior. In this thesis, I will evaluate Optimal Foraging Theory with an empirical test from North Creek Shelter, an archaeological site located in the Escalante Basin on the northern portion of the Colorado Plateau. This test will focus on plant utilization by the early Archaic occupants of the site. An environmental reconstruction for the Escalante Basin will be used to determine the range and quantity of plant resources available to the early Archaic occupants of North Creek Shelter. Then a botanical assemblage …

Age Matters: Class, Family Formation, And Inequality, June Carbone

Santa Clara Law Review

No abstract provided.

Inquiro 2 (Complete Issue), Inquiro Staff

Inquiro (undergraduate research journal)

No abstract provided.

Nobel's Awarded, Inquiro Staff

Inquiro (undergraduate research journal)

p. 4

Dms Air/Sea Flux And Gas Transfer Coefficients From The North Atlantic Summertime Coccolithophore Bloom, Christa Marandino, Warren J. De Bruyn, Scott Miller, Eric S. Saltzman

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Dimethylsulfide (DMS) atmospheric and oceanic concentrations and eddy covariance air/sea fluxes were measured over the N. Atlantic Ocean during July 2007 from Iceland to Woods Hole, MA, USA. Seawater DMS levels north of 55 degrees N ranged from 3 to 17 nM, with variability related to the satellite-derived distributions of coccoliths and to a lesser extent, chlorophyll. For the most intense bloom region southwest of Iceland, DMS air/sea fluxes were as high as 300 mu mol m(-2) d(-1), larger than current model estimates. The observations imply that gas exchange coefficients in this region are significantly greater than those estimated using …

Monitoring Programs To Assess Reintroduction Efforts: A Critical Component In Recovery, Erin Muths, Victoria J. Dreitz

Wildlife Biology Faculty Publications

Reintroduction is a powerful tool in our conservation toolbox. However, the necessary follow–up, i.e. long–term monitoring, is not commonplace and if instituted may lack rigor. We contend that valid monitoring is possible, even with sparse data. We present a means to monitor based on demographic data and a projection model using the Wyoming toad (Bufo baxteri) as an example. Using an iterative process, existing data is built upon gradually such that demographic estimates and subsequent inferences increase in reliability. Reintroduction and defensible monitoring may become increasingly relevant as the outlook for amphibians, especially in tropical regions, continues to …

A Point Mutation In The Two-Component Regulator Phop-Phor Accounts For The Absence Of Polyketide-Derived Acyltrehaloses But Not That Of Phthiocerol Dimycocerosates In Mycobacterium Tuberculosis H37ra, Marie-Laure Chesne-Seck, Nathalie Barilone, Frédéric Boudou, Jesús Gonzalo Asensio, Pappachan E. Kolattukudy, Carlos Martín, Stewart T. Cole, Brigitte Gicquel, Deshmukh N. Gopaul, Mary Jackson

Faculty Bibliography 2000s

Similarities between Mycobacterium tuberculosis phoP-phoR mutants and the attenuated laboratory strain M. tuberculosis H37Ra in terms of morphological and cytochemical properties, lipid content, gene expression and virulence attenuation prompted us to analyze the functionality of this two-component regulator in the latter strain. Sequence analysis revealed a base substitution resulting in a one-amino-acid change in the likely DNA-binding region of PhoP in H37Ra relative to H37Rv. Using gel-shift assays, we show that this mutation abrogates the ability of the H37Ra PhoP protein to bind to a 40-bp segment of its own promoter. Consistent with this result, the phoP gene from H37Rv …

Alayzing The Effects Of Modularity On Search Spaces, Ozlem Garibay

Electronic Theses and Dissertations

We are continuously challenged by ever increasing problem complexity and the need to develop algorithms that can solve complex problems and solve them within a reasonable amount of time. Modularity is thought to reduce problem complexity by decomposing large problems into smaller and less complex subproblems. In practice, introducing modularity into evolutionary algorithm representations appears to improve search performance; however, how and why modularity improves performance is not well understood. In this thesis, we seek to better understand the effects of modularity on search. In particular, what are the effects of module creation on the search space structure and how …

Study Of Sexually Transmitted Infections Among Urban Men In Pakistan: Identifying The Bridging Population, Ali M. Mir, Laura Reichenbach, Abdul Wajid, Mumraiz Khan

Reproductive Health

Pakistan currently has low levels of HIV infection, however the country is considered at high potential risk for an HIV epidemic. In major cities there are large concentrations of individuals whose behaviors make them extremely vulnerable to the rapid spread of HIV and of classical sexually transmitted infections (STIs), including male and female sex workers, men who have sex with men, and injecting drug users. HIV can spread to the general population through individuals who have contact with both high-risk groups and the general heterosexual population (the “bridging population”). Identifying the bridging population and bridging behaviors among urban men and …

Pax7 Is Requisite For Maintenance Of A Subpopulation Of Superior Collicular Neurons And Shows A Diverging Expression Pattern To Pax3 During Superioir Collicular Development, Jennifer Thompson, Andreas Zembrzycki, Ahmed Mansouri, Melanie Ziman

Research outputs pre 2011

Pax7 encodes a transcription factor well-established as an important determinant of mesencephalic identity and superior collicular development. Pax7 mutant mice, however, present with no obvious morphological impairments to the superior colliculus. This finding is paradoxical and has been attributed to functional redundancy afforded by its paralogue Pax3. Here we utilise Pax7 mutant mice to investigate the precise role of this important developmental regulator during superior collicular development and neuronal specification/differentiation. We also assess its spatiotemporal relationship with Pax3 during embryonic development. Analysis of the superior colliculus of Pax7 mutant and wildtype mice at a variety of developmental timepoints revealed that …

A History Of The Biology Department, Omer R. Larson

UND Departmental Histories

This departmental history was written on the occasion of the UND Quasquicentennial in 2008.

Transport Of Blue Crab Larvae In The Middle Atlantic Bight: A Wet And Windy Journey, Charles E. Epifanio, Charles E. Tilburg

Journal of Marine Research

This paper describes the 25-year evolution of a program of research into the larval ecology of the Atlantic blue crab (Callinectes sapidus) near the mouth of Delaware Bay on the east coast of the USA (38.5N, 75.1W). The investigation began as a biological study; eventually incorporated a physical component; and finally added a mathematical modeling aspect. Early work was strictly biological and demonstrated that C. sapidus larvae are exported from the estuary to the adjacent coastal ocean where larval development occurs. Once this fact was established, it was clear that further progress demanded an understanding of shelf circulation. …

Primary Neuron/Astrocyte Co-Culture On Polyelectrolyte Multilayer Films: A Template For Studying Astrocyte-Mediated Oxidative Stress In Neurons, Srivatsan Kidambi, Ilsoon Lee, Christina Chan

Department of Chemical and Biomolecular Engineering: Faculty Publications

We engineered patterned co-cultures of primary neurons and astrocytes on polyelectrolyte multilayer (PEM) films without the aid of adhesive proteins/ligands to study the oxidative stress mediated by astrocytes on neuronal cells. A number of studies have explored engineering co-culture of neurons and astrocytes predominantly using cell lines rather than primary cells owing to the difficulties involved in attaching primary cells onto synthetic surfaces. To our knowledge this is the first demonstration of patterned co-culture of primary neurons and astrocytes for studying neuronal metabolism. In our study, we used synthetic polymers, namely poly(diallyldimethylammoniumchloride) (PDAC) and sulfonated poly(styrene) (SPS) as the polycation …

Increasing The Sensitivity Of A Surface Plasmon Resonance Biosensor, Fatemeh Parayandeh

Master's Theses

No abstract provided.

Self-Assembled Layer-By-Layer Star Polymers By Electrostatic Interactions, Cecile Semana Bonifacio

Master's Theses

No abstract provided.

Microfluidic Delivery Of Small Molecules Into Mammalian Cells Based On Hydrodynamic Focusing, F Wang, H Wang, J Wang, H.-Y. Wang, P L. Rummel, S V. Garimella, C Lu

CTRC Research Publications

Microfluidics-based cell assays offer high levels of automation and integration, and allow multiple assays to be run in parallel, based on reduced sample volumes. These characteristics make them attractive for studies associated with drug discovery. Controlled delivery of drug molecules or other exogenous materials into cells is a critical issue that needs to be addressed before microfluidics can serve as a viable platform for drug screening and studies. In this study, we report the application of hydrodynamic focusing for controlled delivery of small molecules into cells immobilized on the substrate of a microfluidic device. We delivered calcein AM which was …

The Impact Of Nutrient Availability And Algal Community On Carbon Isotope Fractionaion In Crystal Lake, Clark County, Ohio, April R. Wisebaker

Browse all Theses and Dissertations

Crystal Lakes are a group of four interconnected lakes, located in southwestern Clark County, Ohio. Several studies have looked at separate geochemical and isotopic information at this location. However, no one has thoroughly studied the relationship between the algal community, geochemistry, and carbon isotope fractionation within Crystal Lake. The fractionation of carbon isotopes of dissolved inorganic carbonate is greatly affected by the process of photosynthesis; the amount of photosynthesis is affected by the amount of algae in the aquatic community; the amount of algae is affected by the available nutrients in system. Therefore, there should be a correlation between the …

Algorithmic Techniques Employed In The Isolation Of Codon Usage Biases In Prokaryotic Genomes, Douglas W. Raiford Iii

Browse all Theses and Dissertations

While genomic sequencing projects are an abundant source of information for biological studies ranging from the molecular to the ecological in scale, much of the information present may yet be hidden from casual analysis. One such information domain, trends in codon usage, can provide a wealth of information about an organism's genes and their expression. Degeneracy in the genetic code allows more than one triplet codon to code for the same amino acid, and usage of these codons is often biased such that one or more of these synonymous codons is preferred. Isolation of translational efficiency bias can have important …

Evanescent Microwave Microscopy Of Porcine Skin Tissue, Richard A. Kleismit

Browse all Theses and Dissertations

This thesis describes the application of a custom designed λ/4 resonant coaxial probe to measurements of the complex permittivity of in vitro freshly excised porcine skin tissue. The dielectric properties of the organic material within the near field of the tip of the probe frustrates the electric field and measurably changes the resonant frequency and quality factor Q of the coaxial sensor, where the change in resonant frequency and quality factor of a tuned resonance is measured as a function of tip-sample separation. The design of the probe enables better spatial resolution than previously developed probes. The following studies were …

Determination Of The Effects Of Extremely Low Frequency Electromagnetic Fields On The Percentages Of Peripheral Blood Leukocytes And Histology Of Lymphoid Organs Of The Mouse, Aynur E. Cicekcibasi, Ilhami Celik, Ahmet Salbacak, Yasemin Ozkan, Nilsel Okudan, Mustafa Buyukmumcu

Saudi Medical Journal

OBJECTIVE: To determine the effects of very weak, extremely low frequency (50 Hz) electromagnetic field (ELF-EMF) on the relative spleen weight, lymphoid organ histology, peripheral blood leukocyte and alpha-naphthyl acetate esterase positive (ANAE- positive) lymphocyte percentages of the mouse. METHODS: The study was carried out in Scientific Research and Application Center of Selcuk University, Konya, Turkey in 2005. A total of 120 Swiss albino mice were divided into 6 groups (20 in each group). The experimental animals were exposed to 1, 2, 3, 4 and 5 uT flux intensities (rms) of EMF at 50 Hz for 40 days. RESULTS: In …

Investigation Of Lipoteichoic Acid Structure And Function To Establish Its Role In Gram-Positive Bacterial Infections, Ho Seong Seo

All ETDs from UAB

Lipoteichoic acid (LTA) is an essential bacterial membrane polysaccharide (cell wall component) that is linked to a glycerol backbone with two acyl chains. Since an antibody to LTA has been shown to protect from Gr+ bacterial infections or colonization, and the mutant Gr+ bacteria which produce less amount of LTA have less pathogenic than WT, LTA may be an important role in Gr+ bacterial infection and inflammation. The currently accepted structure of pneumococcal LTA has the pentameric repeating unit bound to the lipid anchor {Glc(β1��3)AATGal(β1��3)Glc(α1��3)-acyl2Gro}. Unlike the lipid anchor of other Gr+ bacterial LTA, this pneumococcal LTA lipid anchor has …

Fluorescence Based Optical Sensor For Protein Detection, Kailiang Sun

All ETDs from UAB

No abstract provided.

Giardia Lamblia: Genomic And Molecular Analyses Of Flippase, Diana Leticia Villazana-Kretzer

Open Access Theses & Dissertations

Giardia lamblia, is an intestinal protozoan parasite responsible as a major cause of water-borne intestinal infection in humans (giardiasis). It has been proposed earlier that Giardia has limited lipid synThesis ability and therefore relies on preformed lipid molecules from outside sources. It has also been proposed that lipids are taken up through passive and active transport, and giardial flippasse play a significant role in this process. This study describes the identification and characterization of a putative homologue of flippase gene from Giardia. Flippase is an enzyme that functions as a trans-bilayer transport system facilitating the flip flop diffusion of phospholipids …

Predation By Crabs On Rocky Shores In North-East Atlantic, Ana Catarina Ferreira Da Silva

Other Faculty of Science and Engineering Theses

Highly mobile predators are known to have an important influence on shallow-water habitats. There is, however, little information about the role of crabs on the ecology of rocky shores. Here I examine the extent and consequences of predation by crabs on shores in the North-East Atlantic. The specific aims of this thesis are to: investigate spatial variation in use of the intertidal by crabs along a horizontal gradient of exposure to wave action and a vertical gradient of tidal elevation; assess their use of the intertidal as a feeding area by examining stomach content composition; examine the extent of connectivity …