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Retrospective Theses and Dissertations

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Evaluation Of Serbian Commercial Corn Hybrid Tolerance To Feeding By Larval Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Using The Novel Difference Approach, Stephanie Rose KadličKo Jan 2008

Evaluation Of Serbian Commercial Corn Hybrid Tolerance To Feeding By Larval Western Corn Rootworm (Diabrotica Virgifera Virgifera Leconte) Using The Novel Difference Approach, Stephanie Rose KadličKo

Retrospective Theses and Dissertations

Since the discovery of the pest in 1992, western corn rootworm (Diabrotica virgifera virgifera LeConte (WCR)) populations in Serbia have successfully been kept low with crop rotation. This has reduced the efficiency of screening for WCR resistance. A cooperative project between Iowa State University and the Maize Research Institute, Zemun Polje evaluated 13 Serbian commercial corn varieties in Ames, Iowa over a two-year period. Corn hybrids were planted on trap crops where high WCR populations were assumed. Hybrids were evaluated for WCR resistance using a randomized complete block design with four replications. Treatments were paired rows arranged in split plots ...


Studies On The Vector Competence Of A Mid-Western Strain Of Aedes Vexans (Meigen) (Diptera: Culicidae) For West Nile Virus, Jason Robert Kinley Jan 2008

Studies On The Vector Competence Of A Mid-Western Strain Of Aedes Vexans (Meigen) (Diptera: Culicidae) For West Nile Virus, Jason Robert Kinley

Retrospective Theses and Dissertations

Aedes vexans (Meigen) mosquitoes were given access to 2- to 4-day-old chickens inoculated with 103.0 CID50s/ml West Nile Virus (WNV) at 1 day old. Mosquitoes were given access to chickens at different intervals after inoculation to make certain that blood meals were of varying virus titers. No differences occurred in infection rates of Ae. vexans and Culex pipiens (L.) fed on the same WNV viremic chicken. Infection rates of Ae. vexans were higher when fed on chickens with viremias of 6.0 log10 WNV PFUs/ml or higher than they were in mosquitoes fed on chickens with viremias ...


The State, Resilience, And Potential Future Of Oak-Dominated Forests In The Driftless Area Of The Midwestern U.S., Tricia Gorby Knoot Jan 2008

The State, Resilience, And Potential Future Of Oak-Dominated Forests In The Driftless Area Of The Midwestern U.S., Tricia Gorby Knoot

Retrospective Theses and Dissertations

Forest surveys over the last several decades indicate a decline in oak regeneration in the midwestern United States with a high potential for future replacement by later successional forest types. The current state of oak systems may be nearing critical thresholds, which, if reached, their restoration could become markedly more challenging, if not impossible. Through a combination of qualitative and quantitative research methods, I evaluated the state, resilience, and potential future of oak forest ecosystems within the Driftless Area of the midwestern U.S., with the intention of providing information that can inform the design of timely and targeted oak-specific ...


Protein Kinase C-Delta In Dopaminergic System And Experimental Models Of Parkinson's Disease, Danhui Zhang Jan 2008

Protein Kinase C-Delta In Dopaminergic System And Experimental Models Of Parkinson's Disease, Danhui Zhang

Retrospective Theses and Dissertations

Parkinson's disease (PD) is a major neurodegenerative disorder characterized by progressive and substantial loss of dopaminergic neurons in the substantia nigra compacta (SNc). Currently, no available drugs prevent the progressive loss of nigral dopaminergic neurons. The mechanisms underlying the dopaminergic degenerative process observed in PD are not well understood, which has hampered development of successful neuroprotective drugs. Tyrosine hydroxylase (TH) is the rate-limiting enzyme in dopamine synthesis. Severely reduced TH positive neurons and TH fibers in dopaminergic terminal fields of PD patients and the successful application of L-DOPA therapy for Parkinson's disease suggest that this enzyme has a ...


Phylogenetic Placement And Population Genetic Analysis Of The Endangered Winged Mapleleaf, Quadrula Fragosa, Amanda Heather Hemmingsen Jan 2008

Phylogenetic Placement And Population Genetic Analysis Of The Endangered Winged Mapleleaf, Quadrula Fragosa, Amanda Heather Hemmingsen

Retrospective Theses and Dissertations

The endangered winged mapleleaf, Quadrula fragosa once occurred in the Mississippi, Tennessee, Ohio, and Cumberland River basins in the United States. While the range of this species was thought to have been reduced to a single population in the St. Croix River (Minnesota/Wisconsin), individuals morphologically similar to Q. fragosa were recently recorded in Missouri, Arkansas, and Oklahoma. We employed a phylogenetic analysis of mitochondrial ND1 gene sequences. Our results indicate that Q. fragosa is a separate species and that the southern populations are genetically Q. fragosa. In addition, we developed and utilized 12 microsatellite loci to quantify genetic variation ...


Evolutionary Variance Of Gene Network Model Via Simulated Annealing, Kyoungmin Roh Jan 2008

Evolutionary Variance Of Gene Network Model Via Simulated Annealing, Kyoungmin Roh

Retrospective Theses and Dissertations

The traditional approach of molecular biology research was on examining and collecting data on a single gene or a single reaction. However, recently, there has been much interest on the dynamics of gene regulatory networks (Klipp et al., 2005). We applied mathematical approach for modeling of gene network. The models depict the reaction kinetics of the constituent parts and the functions are ultimately made from basic principle of simple expressions derived from Michaelis-Menten enzymatic kinetics, and the functional forms are usually chosen as Hill functions that serve as an approximation for the real molecular dynamics (Klipp et al., 2005). These ...


Elucidation Of Anti-Inflammatory Constituents In Hypericum Perforatum Extracts And Delineation Of Mechanisms Of Anti-Inflammatory Activity In Raw 264.7 Mouse Macrophages, Kimberly Dawn Petry Hammer Jan 2008

Elucidation Of Anti-Inflammatory Constituents In Hypericum Perforatum Extracts And Delineation Of Mechanisms Of Anti-Inflammatory Activity In Raw 264.7 Mouse Macrophages, Kimberly Dawn Petry Hammer

Retrospective Theses and Dissertations

Hypericum perforatum (Hp) is commonly known for its anti-viral, anti-depressant, and anti-proliferative properties, but traditionally Hp was also used to treat inflammation. Studies on the anti-inflammatory activity of Hp are far less advanced than studies on other bioactivities. In fact until recently, there was still debate as to which constituents present in Hp may be responsible for the anti-inflammatory properties.;In this study, the anti-inflammatory activity and cytotoxicity of different Hp extractions and accessions and constituents present within Hp extracts were characterized in RAW 264.7 mouse macrophage cells. In contrast to the light-dependent anti-viral activity of Hp, the anti-inflammatory ...


Porcine Reproductive And Respiratory Syndrome Virus: Understanding And Managing Persistent Infection, Ramón Miguel Molina Barrios Jan 2008

Porcine Reproductive And Respiratory Syndrome Virus: Understanding And Managing Persistent Infection, Ramón Miguel Molina Barrios

Retrospective Theses and Dissertations

This experiment was designed as a longitudinal study in which pigs were followed for up to 202 days post inoculation (DPI). On day 0, 109 3-week-old pigs were intramuscularly inoculated with PRRSV strain VR-2332. Negative control pigs (n = 56) were sham inoculated with MEM by the intramuscular route. Thereafter, at approximately 2-week intervals, samples were collected from all animals and a subset of randomly selected animals was euthanized and tissues collected. The presence and amount of virus was assessed using qRT-PCR, standard virus isolation, and bioassay. Detection of PRRSV in serum by qRT-PCR showed that most pigs cleared the viremia ...


A Systematic Investigation Of The Crane Fly Subfamily Limoniinae (Tipuloidea: Limoniidae), Matthew Jon Petersen Jan 2008

A Systematic Investigation Of The Crane Fly Subfamily Limoniinae (Tipuloidea: Limoniidae), Matthew Jon Petersen

Retrospective Theses and Dissertations

The objectives of dissertation work were to provide better taxonomic resolution for the true crane flies (Tipuloidea) by conducting a systematic investigation at multiple taxonomic levels (family, genus, and species). Representing the most taxonomically diverse group of flies (Insecta: Diptera), the Tipuloidea consist of over 15,000 described species, but present a difficult taxonomic structure with unavailable or inadequate taxonomic resources. The evolutionary relationships of this group were examined at multiple taxonomic levels in order to produce a classification and will provide a stable system by which the phylogeny, ecology, and biogeography was examined. The first quantitative analyses of the ...


Effect Of Genetic And Proteomic Variation In Field Isolates Of Mycoplasma Hyopneumoniae On Virulence, Diagnosis And Prevention Of Disease In The Pig, Erin Linn Strait Jan 2008

Effect Of Genetic And Proteomic Variation In Field Isolates Of Mycoplasma Hyopneumoniae On Virulence, Diagnosis And Prevention Of Disease In The Pig, Erin Linn Strait

Retrospective Theses and Dissertations

The purpose of these studies was to investigate the implications of variability in virulence, genetics and antigenic profiles among field isolates of Mycoplasma hyopneumoniae. Increased virulence was compared with in vitro and in vivo growth characteristics of the organism and with immune parameters in the pig, although none was found to be significantly correlated. The impact of proteomic and genetic variation among field isolates on diagnostic assays was examined by both in vivo and in vitro studies. Three enzyme-linked immunosorbent assays (ELISAs) used in the United States were compared and shown to not detect all isolates of M. hyopneumoniae equally ...


Analysis Of A Ddgs Air-Drying System With Heat Recovery, Christopher Brady Hoeck Jan 2008

Analysis Of A Ddgs Air-Drying System With Heat Recovery, Christopher Brady Hoeck

Retrospective Theses and Dissertations

Dry Distiller Grains with Soluble (DDGS) are a co-product of the conversion from corn into Ethanol fuel. Several applications depend on the ability of a drying process to remove moisture from a product, such as DDGS, in an effective and economical manner. Common drying methods use air to facilitate product drying as it proficiently absorbs the unwanted moisture, creating a moist-air mixture that captures both the latent and sensible heat released from the product. The most economical approach to an Air Drying System integrates a heat recovery system that transfers the heat removed by the moist-air mixture during drying back ...


Phylogenetic Relationships Among The Temperate Bamboos (Poaceae: Bambusoideae) With An Emphasis On Arundinaria And Allies, Jimmy K. Triplett Jan 2008

Phylogenetic Relationships Among The Temperate Bamboos (Poaceae: Bambusoideae) With An Emphasis On Arundinaria And Allies, Jimmy K. Triplett

Retrospective Theses and Dissertations

The temperate clade is a diverse but poorly understood major lineage of woody bamboos (Poaceae: Bambusoideae: Bambuseae). Ongoing work is needed to reconstruct evolutionary relationships and establish nomenclatural stability for this difficult but ecologically and economically important group. We present the first robust multilocus plastid phylogeny for the temperate bamboos, assess relationships among key genera with an emphasis on Arundinaria and its allies, and discuss evolutionary phenomena potentially responsible for the taxonomic complexity of this group. Utilizing a total of twelve cp DNA regions (1 coding, 10 intergenic spacers, 1 intron), the temperate bamboos were resolved to include six major ...


Comparison Of Air-Displacement Plethysmography And Hydrodensitometry In High School Football Linemen, Timothy Egan Moran Jan 2008

Comparison Of Air-Displacement Plethysmography And Hydrodensitometry In High School Football Linemen, Timothy Egan Moran

Retrospective Theses and Dissertations

Recently, there has been concern about obesity and its co-morbidities among football linemen from the youth to professional level. The purpose of this study was two-fold: (1) to examine the association between body mass index (BMI) and percentage fat determined by air-displacement plethysmography (ADP) and hydrodensitometry (HW) in high school football linemen and (2) to compare ADP with HW in high school football linemen to determine the feasibility and accuracy of ADP compared with HW in this group. Thirty-one high school football linemen were recruited from local high schools and were measured for height, body mass, and percentage fat estimated ...


Interactive Graphics, Graphical User Interfaces And Software Interfaces For The Analysis Of Biological Experimental Data And Networks, Michael Lawrence Jan 2008

Interactive Graphics, Graphical User Interfaces And Software Interfaces For The Analysis Of Biological Experimental Data And Networks, Michael Lawrence

Retrospective Theses and Dissertations

Biologists need to analyze and comprehend increasingly large and more complex multivariate experimental data. Biological experiments often produce multiple data sets, each describing one aspect of the system, such as the transcriptome recorded by a microarray or metabolome recorded using gas chromatography mass spectrometry (GC-MS). A biochemical network model provides a conceptual system-level framework for integrating data from different sources.;Effective use of graphics enhances the comprehension of data, and interactive graphics permit the analyst to actively explore data, check its integrity, satiate curiosities and reveal the unexpected. Interactive graphics have not been widely applied as a means for understanding ...


Understanding Protein Motions By Computational Modeling And Statistical Approaches, Lei Yang Jan 2008

Understanding Protein Motions By Computational Modeling And Statistical Approaches, Lei Yang

Retrospective Theses and Dissertations

Because of its appealing simplicity, the elastic network model (ENM) has been widely accepted and applied to study many molecular motion problems, such as the molecular mechanisms of chaperonin GroEL-GroES function, allosteric changes in hemoglobin, ribosome motions, motor-protein motions, and conformational changes in general. In this dissertation, the ENM is employed to study various protein dynamics problems, and its validity is also examined by comparing with experimental data. First, we apply principal component analysis (PCA) to identify the essential protein motions from multiple structures (X-ray, NMR and MD) of the HIV-1 protease. We find significant similarities between the first few ...


Analysis On Protein Structures Using Statistical And Bioinformatical Methods, Aimin Yan Jan 2008

Analysis On Protein Structures Using Statistical And Bioinformatical Methods, Aimin Yan

Retrospective Theses and Dissertations

This PhD dissertation mainly focuses on the statistical analysis for the protein structure data. The first research project focuses on data mining and prediction for side chain orientation in protein structure. Through this study, we find that the general side chain orientation can be viewed as a manifestation of hydrophobic force. Along with this study, we also developed the software for visualizing the general side chain vector and applied statistical machine learning methods to fit several models for predicting general side chain orientation. In the second project, we studied the motion of partially assembled ribosome 30S subunit using the coarse-grained ...


Exploring Host-Pathogen Relationships Through Computer Simulations Of Intracellular Infection, Garrett Marc Dancik Jan 2008

Exploring Host-Pathogen Relationships Through Computer Simulations Of Intracellular Infection, Garrett Marc Dancik

Retrospective Theses and Dissertations

Computer simulations of infectious disease allow for the identification and estimation of important pathogen and immune parameters, the validation of theoretical biological models with experimental data, and the characterization of the host-pathogen interactions that lead to emergent and sometimes counterintuitive behavior. This thesis describes the development, analysis, and calibration of a computer model of Leishmania major infection, the identification of correlates of escape mutant success and optimal escape strategies in a computer model of a viral infection, and statistical software to aid in computer model analysis and calibration.;In an agent-based model of L. major infection, sensitivity analysis reveals that ...


Agronomic Performance, Seed Characteristics, And Stability Of Soybean Lines Containing Mid Oleate Content And Molecular Analysis For Diversity In The Fad2-1b Gene, Curtis Wilmer Scherder Jan 2008

Agronomic Performance, Seed Characteristics, And Stability Of Soybean Lines Containing Mid Oleate Content And Molecular Analysis For Diversity In The Fad2-1b Gene, Curtis Wilmer Scherder

Retrospective Theses and Dissertations

Soybean [Glycine max (L.) Merr.] lines with increased levels of oleate content may be useful for the food industry. Iowa State University has used the mutant soybean line, M23, developed by Saga University in Japan, to develop lines that contain mid-oleate content combined with 10 g kg -1 linolenate (MO/LLN), low saturated fatty acids (MO/LS), and both low saturated fatty acids and 10 g kg-1 linolenate (MO/LS/LLN). The first objective of the research was to determine the stability of oleate content across four Iowa environments and one Missouri environment in two years for the three types ...


Molecular, Genetic, Physiological And Biochemical Studies Of 3-Methylcrotonyl-Coa Carboxylase And Biotin Carboxyl Carrier Protein-Like Proteins In Arabidopsis Thaliana, Geng Ding Jan 2008

Molecular, Genetic, Physiological And Biochemical Studies Of 3-Methylcrotonyl-Coa Carboxylase And Biotin Carboxyl Carrier Protein-Like Proteins In Arabidopsis Thaliana, Geng Ding

Retrospective Theses and Dissertations

Biotin-containing enzymes are involved in metabolic reactions that are essential for normal cellular functions in all organisms. In plants, four biotin-containing enzymes have been identified to date: homomeric acetyl-CoA carboxylase, heteromeric acetyl-CoA carboxylase, 3-methylcrotonyl-CoA carboxylase (MCCase), and geranoyl-CoA carboxylase. This dissertation contains two studies that are both part of the biotin metabolic network. The first study is the functional reverse genetic analysis of MCCase in Arabidopsis. MCCase is a nuclear-encoded, mitochondrial-localized enzyme. The reaction catalyzed by this enzyme is required for leucine (Leu) catabolism in mitochondria, and it may also play a role in the catabolism of isoprenoids and in ...


Functional Analysis Of The C-Terminal Domain In The Drosophila Jil-1 Histone H3 Kinase, Xiaomin Bao Jan 2008

Functional Analysis Of The C-Terminal Domain In The Drosophila Jil-1 Histone H3 Kinase, Xiaomin Bao

Retrospective Theses and Dissertations

Epigenetic regulation is an important process utilized by biological systems to control gene expression and organize development, with histone modification enzymes among the most important components in this regulatory network. The predominant interphase H3 Serine10 kinase in Drosophila is JIL-1, which plays an important role in regulating chromosome structure and modulating gene expression. The full-length JIL-1 protein is composed of four domains including a N-terminal domain (NTD), two kinase domains (KDI and KDII), and a unique C-terminal domain (CTD). In order to study the biological importance of these individual domains, a domain analysis research approach was taken and different functions ...


Perceptions Of Agricultural Extension Educators Regarding Livestock Waste Management Education In The North Central Region, David Kwaw-Mensah Jan 2008

Perceptions Of Agricultural Extension Educators Regarding Livestock Waste Management Education In The North Central Region, David Kwaw-Mensah

Retrospective Theses and Dissertations

Livestock production in the United States yields large quantities of livestock waste annually. The North Central region of the United States produces a variety of livestock including swine, cattle and poultry. Livestock waste is a rich source of plant nutrients and organic matter. The environmental risks of pollution associated with livestock waste raises major concerns of agricultural educators, researchers and policy makers. Best management practices have been developed for livestock waste management. There is limited research information regarding livestock waste management education.;The purpose of this study was to identify the perceptions of county extension educators in the North Central ...


Voltage-Activated Currents And Their Modulation In Somatic Muscle Cells Of The Nematode Ascaris Suum, Saurabh Verma Jan 2008

Voltage-Activated Currents And Their Modulation In Somatic Muscle Cells Of The Nematode Ascaris Suum, Saurabh Verma

Retrospective Theses and Dissertations

Voltage-activated currents have been isolated in nematodes and are associated with depolarization (calcium channels) or recovery of the cell after the depolarization (potassium channels). Different subtypes of voltage-activated calcium channel have been identified in vertebrates. In nematodes, advances in C. elegans genomics led to the identification of voltage-activated calcium channel subtypes. These subtypes show homologies to vertebrate calcium channels but are pharmacologically and physiologically different. The understanding of the physiology of these different voltage-activated channels is becoming increasingly important as we try to lower the development of resistance to present anthelmintics. Major classes of anthelmintics produce their effect by modulating ...


Hypothesis Building Using The Animal Trait Ontology, Laron Maurice Hughes Jan 2008

Hypothesis Building Using The Animal Trait Ontology, Laron Maurice Hughes

Retrospective Theses and Dissertations

With the advent of sequencing projects in model organisms, humans, and domesticated livestock species, the need for storage, retrieval, and analysis of genomics information for these animals has become important. The Animal Trait Ontology (ATO) is an ontology that has been created to store the relationships between farm animal traits for several domesticated farm animals. The Collaborative Ontology Building (COB) editor was used to create and edit the ATO. An online ontology browser has been developed to search and browse the ontology and to view the relationships between the terms. Some of the traits in the ontology are linked to ...


The Locations And Signaling Of H-Ras On Endosomes And Plasma Membrane, Xing Wang Jan 2008

The Locations And Signaling Of H-Ras On Endosomes And Plasma Membrane, Xing Wang

Retrospective Theses and Dissertations

No abstract provided.


Proteins Affecting Rod Photoreceptor Differentiation In The Murine Retina: A Proteomics Approach With Emphasis On Mtor, Alison Elizabeth Barnhill Jan 2008

Proteins Affecting Rod Photoreceptor Differentiation In The Murine Retina: A Proteomics Approach With Emphasis On Mtor, Alison Elizabeth Barnhill

Retrospective Theses and Dissertations

Retinal diseases involving degeneration of photoreceptors are an increasing cause of blindness in this country, particularly among the aging population. A solid understanding of retinal development is central to combating photoreceptor degeneration on several fronts. Defining developmental processes may have therapeutic relevance in 'rehabilitating' photoreceptor cells that can be rescued from degenerative processes by the application of exogenous trophic or survival factors. Further, advances in stem cell research may someday make replacement of photoreceptors a feasible therapy for the treatment of retinal degeneration. In this regard, it will be crucial that we have a clear understanding of the developing retinal ...


Biochemical And Genetic Analyses Of Physical Associations Among Zea Mays Starch Biosynthetic Enzymes, Tracie Ann Hennen-Bierwagen Jan 2008

Biochemical And Genetic Analyses Of Physical Associations Among Zea Mays Starch Biosynthetic Enzymes, Tracie Ann Hennen-Bierwagen

Retrospective Theses and Dissertations

Mutations affecting specific starch biosynthetic enzymes commonly have pleiotropic effects on other enzymes in the same metabolic pathway. Such genetic evidence indicates functional relationships between components of the starch biosynthetic system including starch synthases (SS), starch branching enzymes (BE), and starch debranching enzymes (DBE), however, the molecular explanation for these functional interactions is not known. One possibility is that specific SSs, BEs, and/or DBEs associate physically with each other in multisubunit complexes. To test this hypothesis, this study sought to identify stable associations between SSI, SSIIa, SSIII, SBEI, SBEIIa, and SBEIIb from maize amyloplasts. Three separate detection methods, yeast ...


Immunomodulatory, Anti-Inflammatory And Wound Healing Properties Of Echinacea Species, Zili Zhai Jan 2008

Immunomodulatory, Anti-Inflammatory And Wound Healing Properties Of Echinacea Species, Zili Zhai

Retrospective Theses and Dissertations

Herbal or botanical supplements have multiple health benefits. Public interest in these supplements has increased greatly in recent years aimed at modulation of the immune system to combat immune-related diseases. Historically, Echinacea has long been used as phytotherapy for wound healing, pain relief and treatment of the common cold. Although the non-specific immunostimulating properties of Echinacea species have been widely investigated, academic knowledge of the adaptive immune-modulating activity, the anti-inflammatory activity and the mechanistic basis for these immunomodulatory properties remain elusive. In this dissertation, we focused our research interest in these less explored fields, with an emphasis on the herbal ...


Dissection Of The Mitotic And Nuclear Functions Of Chromator, A Nuclear-Derived Spindle Matrix Component In Drosophila, Yun Ding Jan 2008

Dissection Of The Mitotic And Nuclear Functions Of Chromator, A Nuclear-Derived Spindle Matrix Component In Drosophila, Yun Ding

Retrospective Theses and Dissertations

A spindle matrix has long been proposed to serve as a stationary or elastic molecular matrix substrate for the organization and activities of microtubules and motors, based on the consideration of a mechanical and functional support for the stabilization of microtubule spindle during force generation from mitotic motors. Recently, the identification of four Drosophila proteins, Skeletor, Megator, EAST and Chromator has provided molecular evidence for the existence of this macromolecular matrix structure during mitosis. All of these four proteins have been shown to interact with each other within a protein complex and redistribute from the nucleus at interphase to form ...


Integrating Qtl Analysis Into Plant Breeding Practice Using Bayesian Statistics, Shengqiang Zhong Jan 2008

Integrating Qtl Analysis Into Plant Breeding Practice Using Bayesian Statistics, Shengqiang Zhong

Retrospective Theses and Dissertations

Plant breeders face the challenges to incorporate significant developments in Bayesian quantitative trait locus (QTL) analysis into breeding practice. The overall objective of this dissertation is to integrate QTL analysis into marker-assisted selection (MAS) in plant breeding using Bayesian statistics. Three different perspectives were studied: identification of optimal designs to generate multiple families for QTL mapping, cross prediction using QTL analysis results, and genomic selection for cultivated barley. First, the impact of two mating designs was studied on QTL mapping in multiple families generated by crosses between multiple inbred lines, using within-family linkage disequilibrium (LD) with a Bayesian variable selection ...


The Land, It's Everything: Women Farmland Owners And The Institution Of Agricultural Conservation In The U.S. Midwest, Jean Crim Eells Jan 2008

The Land, It's Everything: Women Farmland Owners And The Institution Of Agricultural Conservation In The U.S. Midwest, Jean Crim Eells

Retrospective Theses and Dissertations

This institutional ethnography was undertaken to address the problematic that far fewer women than men participate in the institution of agricultural conservation despite the fact that about the same numbers of men and women own roughly equal amounts of agricultural land in the U.S. Midwest. The institution of agricultural conservation---governmental agencies and private non-profit organizations---provides conservation services such as technical assistance and funding to clients, private farmland owners, who implement conservation practices on their lands.;As a qualitative research methodology, institutional ethnography (IE) is a way to examine otherwise intractable or elusive problems that exist on an institutional level ...