Digital Commons Network^™

Just What Is A “Farm”, Mike Mccurry

SDSU Extension Extra Archives

The 2007 Census of Agriculture showed that the number of farms in the United States has grown since 2002. Conversely, the Census showed that, as they have since 1935, South Dakota’s farm numbers continued to decline (though between 2002 and 2007 the rate of decline slowed signifi-cantly). These opposing facts (i.e., national growth vs. South Dakota decline) have motivated calls to South Dakota State University’s Rural Life and Census Data Center. The calls ask basically the same question: “Just what is a farm?” It’s a relevant question.

Managing Plant Diseases In The Home Garden, Kay R. Ruden, Lawrence E. Osborne, Rhoda Burrows

SDSU Extension Fact Sheets

No abstract provided.

Guatemala's Green Revolution: Synthetic Fertilizer, Public Health, And Economic Autonomy In The Mayan Highland, David Carey

Faculty Publications

Despite extensive literature both supporting and critiquing the Green Revolution, surprisingly little attention has been paid to synthetic fertilizers' health and environmental effects or indigenous farmers' perspectives. The introduction of agrochemicals in the mid-twentieth century was a watershed event for many Mayan farmers in Guatemala. While some Maya hailed synthetic fertilizers' immediate effectiveness as a relief from famines and migrant labor, others lamented the long-term deterioration of their public health, soil quality, and economic autonomy. Since the rising cost of agrochemicals compelled Maya to return to plantation labor in the 1970s, synthetic fertilizers simply shifted, rather than alleviated, Mayan dependency …

Classification And Developmental Biology Of Congenital Anomalies Of The Hand And Upper Extremity, Paul R. Manske, Kerby C. Oberg

Open Access Publications

No abstract provided.

Relational Markets In Intimate Goods, Michele Goodwin

Tulsa Law Review

No abstract provided.

Utep Magazine: The University Of Texas At El Paso, Utep University Communications

UTEP Magazine

Summer 2009

Top 10 Seniors

Global Stability For An Seir Epidemiological Model With Varying Infectivity And Infinite Delay, C. Connell Mccluskey

Mathematics Faculty Publications

A recent paper (Math. Biosci. and Eng. (2008) 5:389-402) presented an SEIR model using an infinite delay to account for varying infectivity. The analysis in that paper did not resolve the global dynamics for R₀ > 1. Here, we show that the endemic equilibrium is globally stable for R₀ > 1. The proof uses a Lyapunov functional that includes an integral over all previous states.

Assessing Organic Matter Breakdown And Associated Macroinvertebrate Community Structure In Headwater Streams: Effects Of Hydrologic Gradients And Upland Timber Harvesting, Miller Scott Jarrell

Masters Theses & Specialist Projects

I examined the effects of hydrologic gradients and upland timber harvesting with different streamside management zone widths on yellow-poplar (Liriodendron tulipifera) processing and the associated macroinvertebrate community structure in the Cumberland Plateau ecophysic region, U.S.A. Prior to upland timber harvesting, 5.0 ± 0.1 g yellow-poplar leaf packs were constructed, zip-tied to gutter nails, and placed into 7 perennial and 6 temporary stream reaches with similar physiochemical and geomorphic characteristics. From December 2007 to May 2008, 3–5 leaf packs were collected per reach monthly. I found significant differences in the functional feeding group composition. Temporary reaches contained higher shredder, gathering-collector, predator, …

The Effect Of Endothelin-1 On The Expression Of Cdk Inhibitors P21 & P27 In Bovine Corneal Endothelial Cells, Lakshmi Reddy Bollu

Masters Theses & Specialist Projects

Mammalian corneal endothelial cells are considered to be non-proliferative due to the arrest of cells at the G1 phase of the cell cycle. The purpose of this study was to determine whether the down regulation of cyclin dependant kinase inhibitors (p21cip1 and p27kip1) levels by Endothelin-1 (ET-1), would overcome the G1 phase arrest and promote cell cycle progression and proliferation in cultured BCECs (Bovine corneal endothelial cells). BCECs were isolated from bovine corneas and cultured in DMEM supplemented with 10% serum. 5-Bromo 2-deoxy Uridine (BrdU) incorporation was determined in serum starved cultures in 24-well plates as a measure of cell …

The Classic, Summer 2009, Public Relations

The Classic, 2000-2009

Zwemer View: The Community of Christ; In Box; Servant Scientist; Green Generation; On Board; Summer Lovin'; The Class of 2009; Of Course: Brain Camp; Money for Medicine; Top Teacher; Program makes the grade; Purposeful; Healthy Report; Lab Time; Chief Fundraiser; Bravo!; Face Value: Pam Vlieger; 1000 Words: Passport; Green Plea: An Interview with J. Matthew Sleeth, M.D.; Committed Servants: Carl Vandermeulen and John Greller end their long tenures at Northwestern; Cipher Success: Student computer programmers crack code and earn trans-Atlantic trip to world finals; Unsung Heroes: Students are the focus for a maintenance staff that keeps Northwestern running; Changing Tracks: …

Ua64/2 The Challenge: Magazine Of The Center For Gifted Studies (No. 23, Summer 2009), Center For Gifted Studies, Tracy Inman Editor

Gifted Studies Publications

No abstract provided.

Art As A Venue For Political Commentary: The Modern Mexican Printmaker And Social Consciousness, Gabriela Pickett

Master of Humanities Capstone Projects

This master’s project addresses the relationship between the Mexican roots of the author and her personal artistic expression. Growing up in México, the author was greatly influenced by the artistic talent of her father, as well as the work of many iconic Mexican artists. From a very early age she recognized how the political climate surrounding the Mexican Revolution and the visual arts complimented each other. The murals of Diego Rivera (1886-1959) are evidence of the fusion of art and a visual depiction of the history of México. This exposure helped her appreciate the process of defining cultural identity through …

A Prairie Rendezvous, Vol. 11, No. 3 (Summer 2009), Grand Prairie Friends

Newsletters

No abstract provided.

Fallow Bucks Get Hoarse: Vocal Fatigue As A Possible Signal To Conspecifics, Elisabetta Vannoni, Alan G. Mcelligott

Veterinary Science and Medicine Collection

Many studies of sexually selected vocal communication assume that calls remain stable throughout the breeding season. However, during this period, physiological and social factors change and these can have strong effects on the structure of calls and calling rates. During the rut, fallow bucks, Dama dama, reduce their feeding and increase the time and energy spent on vocalizing and fighting to gain matings, and consequently their body condition declines greatly. The availability of matings and intensity of competition between males also change. Therefore, we predicted that male vocal signalling would vary over time in response to the changing intersexual and …

On The Playground For Children - And For Josie, Matt Lazier

Cal Poly Magazine

No abstract provided.

Lawrence Today, Volume 89, Number 4, Summer 2009, Lawrence University

Alumni Magazines

No abstract provided.

Benchmarks 2009, July 3, The Rockefeller University

BenchMarks 2009

BenchMarks. Friday, July 3, 2009

The community newsletter of The Rockefeller University

BenchMarks is published monthly and is distributed on the campus of The Rockefeller University. It produced by the Office of Communications and Public Affairs

You've Gotta Read This: Summer Reading At Musselman Library (2009), Musselman Library

You’ve Gotta Read This: Summer Reading at Musselman Library

Each year Musselman Library asks Gettysburg College faculty, staff, and administrators to help create a suggested summer reading list to inspire students and the rest of our campus community to take time in the summer to sit back, relax, and read. These summer reading picks are guaranteed to offer much adventure, drama, and fun!

Habitat Mapping In The Farasan Islands (Saudi Arabia) Using Casi And Quickbird Imagery, Gwilym Rowlands, James A. Goodman, Bernhard Riegl, Philip Renaud, Samuel J. Purkis

Marine & Environmental Sciences Faculty Proceedings, Presentations, Speeches, Lectures

Map products derived from remote sensing technology increase our understanding and ability to manage tropical marine environments. The enhanced mapping capabilities of hyperspectral sensors are well understood; yet technology uptake, particularly for large scale tasks, has been slow. The study presented represents one of the largest hyperspectral projects to date, and paves the way towards increased use of this technology. Hyperspectral CASI-550 imagery and multispectral QuickBird imagery, was acquired over 3,168 km² of the Farasan Islands. In addition to the typical image processing steps, inopportune water condensation in the CASI sensors lens necessitated further processing to remove an across-track …

Not All Grace Periods Are Created Equal: Building A Grace Period From The Ground Up, Renee E. Metzler

Marquette Intellectual Property Law Review

The grace period for patent application filing is the amount of time a patent applicant has to file the application after the invention has been disclosed to the public. The rules and amount of time allowed vary greatly among countries. This comment explores the theoretical justifications for a grace period, the structural elements of a grace period, and other approaches to a grace period used in countries outside of the United States. The author proposes an ideal grace period model that would create international harmonization.

A Continent-Wide Clone: Population Genetic Variation Of The Invasive Plant Hieracium Aurantiacum (Orange Hawkweed; Asteraceae) In North America, Eli S. Loomis, Lila Fishman

Biological Sciences Faculty Publications

We investigated the population genetic structure of the invasive plant Hieracium aurantiacum (Asteraceae), a facultative apomict. We generated amplified fragment length polymorphism fingerprints for H. aurantiacum samples from across its invasive range in North America (N = 226) and from six other North American native and invasive Hieracium species (N = 60). Almost no genetic variability was found in the North American H. aurantiacum across locations from Alaska and Oregon to Pennsylvania and Ontario (clonal diversity = 0.035). In contrast, other Hieracium species showed a range of clonal diversities (range = 0.154-1.0). The single H. aurantiacum genotype that dominated the …

Bar-Coded Pyrosequencing Reveals Shared Bacterial Community Properties Along The Temperature Gradients Of Two Alkaline Hot Springs In Yellowstone National Park, Scott R. Miller, Aaron L. Strong, Kenneter L. Jones, Mark C. Ungerer

Biological Sciences Faculty Publications

An understanding of how communities are organized is a fundamental goal of ecology but one which has historically been elusive for microbial systems. We used a bar-coded pyrosequencing approach targeting the V3 region of the bacterial small-subunit rRNA gene to address the factors that structure communities along the thermal gradients of two alkaline hot springs in the Lower Geyser Basin of Yellowstone National Park. The filtered data set included a total of nearly 34,000 sequences from 39 environmental samples. Each was assigned to one of 391 operational taxonomic units (OTUs) identified by their unique V3 sequence signatures. Although the two …

Differential Interactions Of The Catalytic Subunits Of Adenylyl Cyclase With Forskolin Analogs, Cibele Pinto, Melanie Hübner, Andreas Gille, Mark Richter, Tung-Chung Mou, Stephen R. Sprang, Roland Seifert

Biological Sciences Faculty Publications

The diterpene forskolin (FS) binds to, and activates, mammalian membranous adenylyl cyclase (AC) isoforms I-VIII. Diterpenes without C(1)-OH group do not activate ACs. The C(1)-OH group forms a hydrogen bond with the backbone oxygen of Val506 of the C1 catalytic subunit of AC (isoform V numbering). To better understand the mechanism of AC activation we examined the interactions of FS and eight FS analogs with purified catalytic AC subunits C1 (AC V) and C2 (AC II) by fluorescence spectroscopy, using 2',3'-O-(N-methylanthraniloyl)-guanosine 5'-triphosphate (MANT-GTP) as fluorescent reporter probe, and by enzymatic activity. FS analogs induced C1/C2 assembly as assessed by fluorescence …

Overexpression Of A Mutant Form Of Ehraba, A Unique Rab Gtpase Of Entamoeba Histolytica, Alters Endoplasmic Reticulum Morphology And Localization Of The Gal/Galnac Adherence Lectin, B. H. Welter, Lesly A. Temesvari

Publications

Entamoeba histolytica is a protozoan parasite that causes amoebic dysentery and liver abscess. Vesicle trafficking events, such as phagocytosis and delivery of plasma membrane proteins, have been implicated in pathogenicity. Rab GTPases are proteins whose primary function is to regulate vesicle trafficking; therefore, understanding the function of Rabs in this organism may provide insight into virulence. E. histolytica possesses a number of unique Rabs that exhibit limited homology to host Rabs. In this study we examined the function of one such Rab, EhRabA, by characterizing a mutant overexpressing a constitutively GTP-bound version of the protein. Overexpression of mutant EhRabA resulted …

Summer 2009, Seattle University

Seattle University Magazine

No abstract provided.

Molluscan Models In Evolutionary Biology: Apple Snails (Gastropoda: Ampullariidae) As A System For Addressing Fundamental Questions, Kenneth Hayes

Department of Biology Faculty Publications

Molluscs constitute the second largest phylum in terms of the number of described species and possess a wide array of characteristics and adaptations for living in marine, terrestrial, and freshwater habitats. They are morphologically diverse and appear in the fossil record as far back as the early Cambrian (-560 mybp). Despite their high diversity and long evolutionary history, molluscs are often underused as models for the study of general aspects of evolutionary biology. Freshwater snails in the family Ampullariidae have a global tropical and subtropical distribution and high diversity with more than 150 species in nine currently recognized genera, making …

Was Climate The Prime Releaser For Encephalization? An Editorial Comment, David Schwartzman, George Middendorf, Miranda Armour-Chelu

Department of Biology Faculty Publications

Kleidon (2009) concludes that warm climates impose important constraints on the evolution of large brains relative to body size, confirming our previous hypothesis (Schwartzman and Middendorf 2000). Here we update the case for our hypothesis and present a first approximation estimate of the cooling required for hominin brain size increase using a simple model of heat loss. We conclude that Pleistocene glacial episodes were likely sufficient to serve as prime releasers for emergence of Homo habilis and Homo erectus. In addition, we propose that atmospheric oxygen levels may been an analogous constraint on insect encephalization.

Partitioning The Apical Domain Of The Arabidopsis Embryo Requires The Bobber1 Nudc Domain Protein, R. J. Jurkuta, Nicholas J. Kaplinsky, Jennifer Elizabeth Spindel , '10, M. K. Barton

Biology Faculty Works

The apical domain of the embryo is partitioned into distinct regions that will give rise to the cotyledons and the shoot apical meristem. In this article, we describe a novel screen to identify Arabidopsis thaliana embryo arrest mutants that are defective in this partitioning, and we describe the phenotype of one such mutant, bobber1. bobber1 mutants arrest at the globular stage of development, they express the meristem-specific SHOOTMERISTEMLESS gene throughout the top half of the embryo, and they fail to express the AINTEGUMENTA transcript normally found in cotyledons. Thus, BOBBER1 is required to limit the extent of the meristem domain …

Explorer, Summer 2009, Nova Southeastern University

Newsletters

No abstract provided.

Micro, Nano Encapsulation Methods For Sustained Release Drug Formulations And Biomimetic Applications, Shantanu Balkundi

Doctoral Dissertations

The Layer-by-Layer (LbL) assembly technique was used to obtain a new type of protein/polyphenol microcapsule based on naturally occurring polyphenol (-)-epigallocatechin gallate (EGCG) and gelatin, type A. The dependence of permeability on the molecular weight of permeating substances was studied and compared with commonly used polyallylamine/polystyrene sulfonate capsules. A quartz crystal microbalance was used to monitor the regularities of EGCG adsorption in alternation with type A and B Gelatins and electrophoretic mobility measurements were used that indicated that the nature of assembly was dependent on Gelatin properties. It was shown that EGCG retains its antioxidant activity in the LbL assemblies. …