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Full-Text Articles in Life Sciences

Minerva 2004, The Honors College Dec 2004

Minerva 2004, The Honors College

Minerva

This issue of Minerva includes an article on HON 350: An Introduction to Functional Genomics; an article on the creation and inaugural year of HON 180: A Cultural Odyssey; a profile on Honors alumnus, Charles Stanhope and his 2004 Distinguished Honors Graduate Lecture; and interviews with Allison Kelly, Jessica Hudec, and Jennifer Merchant on their experiences as Honors student-athletes.


Poulty Manure Impacts On Water Quality, Melissa R. Cheatham, R. S. Kanwar, J. Lorimor, H. Xin, C. Pedersen Dec 2004

Poulty Manure Impacts On Water Quality, Melissa R. Cheatham, R. S. Kanwar, J. Lorimor, H. Xin, C. Pedersen

Proceedings of the Integrated Crop Management Conference

Iowa's egg industry continues to grow each year. In 2001, Iowa became the number one egg producing state in the US, producing 8.69 billion eggs (USDA, 2003; USDA 2002). Iowa broke its record the following year producing 10.1 billion eggs which it topped again in 2003 producing 10.1 billion eggs, thus maintaining its position as number one egg producing state in the US (USDA, 2003; USDA, 2004). With this success comes the added weight of maintaining this status, as well as, managing for all the manure that is generated by being the number one producer. Poultry ...


Conservation Tillage, Soil Erosion And Water Quality, John M. Laflen Dec 2004

Conservation Tillage, Soil Erosion And Water Quality, John M. Laflen

Proceedings of the Integrated Crop Management Conference

Conservation tillage has a great effect on soil erosion and water quality. This effect is perhaps best understood by understanding of the runoff, erosion and sediment delivery processes, and how these are impacted by conservation tillage. Tillage is an operation that disturbs the soil. Each tool acts differently. Major impacts of tillage may be to invert the soil, to bury residue, to mix materials on the surface with materials below the surface, to change soil density at various levels within the soil depth, to apply materials on and into the soil. Wind erosion and groundwater quality will not be covered ...


Resource Conservation Practices: Manure And Tillage Management, Mahdi Al-Kaisi, H. Mark Hanna, Mark A. Licht Dec 2004

Resource Conservation Practices: Manure And Tillage Management, Mahdi Al-Kaisi, H. Mark Hanna, Mark A. Licht

Agriculture and Environment Extension Publications

Adopting best management practices throughout an operation must take into consideration both manure application and tillage management.


Prediction Of Interlaminar Shear Strength Of A Thermally Aged Carbon/Epoxy Composite Material By Fourier Transform Infrared Photoacoustic Spectroscopy, Jeffrey J. Sweterlitsch, Roger W. Jones, David K. Hsu, John F. Mcclelland Dec 2004

Prediction Of Interlaminar Shear Strength Of A Thermally Aged Carbon/Epoxy Composite Material By Fourier Transform Infrared Photoacoustic Spectroscopy, Jeffrey J. Sweterlitsch, Roger W. Jones, David K. Hsu, John F. Mcclelland

Ames Laboratory Publications

Photoacoustic spectroscopy was used to predict the interlaminar shear strength of a carbon/epoxy composite. Samples were artificially aged by exposing the samples to elevated temperatures in an air environment. Short-beam shear tests were performed to determine mechanically the interlaminar shear strength of the samples. Photoacoustic spectra of the samples were also collected and compared to mechanical data. Chemometrics were performed on the spectral and mechanical data, and a good correlation was found between the near surface chemistry of the composite and overall mechanical integrity.


Quality Of The 2004 Soybean Crop From The United States, Thomas J. Brumm, Charles R. Hurburgh Jr., Glen R. Rippke Nov 2004

Quality Of The 2004 Soybean Crop From The United States, Thomas J. Brumm, Charles R. Hurburgh Jr., Glen R. Rippke

Agricultural and Biosystems Engineering Technical Reports and White Papers

Quality continues to be an important soybean marketing issue. This report summarizes current knowledge on the following soybean quality topics: • protein and oil composition of the 2004 U.S. soybean crop, • the 2004 crop in historical perspective, • weather conditions affecting the 2004 crop, • Asian soybean rust and its possible impact on the U.S. soybean crop, • programs by growers and U.S. processors to improve quality, • a study being funded by ASA to examine foreign material in soybean shipments, and • the production of low-linolenic soybeans. The data and analyses in this report are intended to assist customers in the sourcing ...


Bicistronic And Fused Monocistronic Transcripts Are Derived From Adjacent Loci In The Arabidopsis Genome, Jyothi Thimmapuram, Hui Duan, Lei Liu, Mary A. Schuler Nov 2004

Bicistronic And Fused Monocistronic Transcripts Are Derived From Adjacent Loci In The Arabidopsis Genome, Jyothi Thimmapuram, Hui Duan, Lei Liu, Mary A. Schuler

Cyber Center Publications

Comparisons of full-length cDNAs and genomic DNAs available for Arabidopsis thaliana described here indicate that some adjacent loci are transcribed into extremely long RNAs spanning two annotated genes. Once expressed, some of these transcripts are post-transcriptionally spliced within their coding and intergenic sequences to generate bicistronic transcripts containing two complete open reading frames. Others are spliced to generate monocistronic transcripts coding for fusion proteins with sequences derived from both loci. RT-PCR of several P450 transcripts in this collection indicates that these extended transcripts exist side by side with shorter monocistronic transcripts derived from the individual loci in each pair. The ...


2004 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library Oct 2004

2004 Scholars And Artists Bibliography, Michael Schwartz Library, Cleveland State University, Friends Of The Michael Schwartz Library

Scholars and Artists Bibliographies

This bibliography was created for the annual Friends of the Michael Schwartz Library Scholars and Artists Reception, recognizing scholarly and creative achievements of Cleveland State University faculty, staff and emeriti


Method Of Measuring Flow Rate Of Flowable Material Under Continuous Flow Conditions, And An In-Line Continuous Flow Meter, Yuh Yuan Shyy, Manjit K. Misra Oct 2004

Method Of Measuring Flow Rate Of Flowable Material Under Continuous Flow Conditions, And An In-Line Continuous Flow Meter, Yuh Yuan Shyy, Manjit K. Misra

Iowa State University Patents

A method of determining the rate of flow of a flowable material, particulate or liquid, through a flowable material passageway, comprising causing the material passing through the passageway to move downwardly by gravity slowing the downward movement of material as compared to free falling gravitational movement measuring the weight of material passing slowly downwardly with respect to the passageway; causing an electronic signal to be generated in response to the magnitude of the weight measuring; and connecting the electronic signal to a read out display to reflect the flow rate of material with respect to units of weight with respect ...


Residue Management After Harvest, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman Oct 2004

Residue Management After Harvest, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman

Integrated Crop Management News

As we are in the harvest season, producers are searching for the best way to manage their residue cover, particularly with corn. Some farmers manage their residue by chopping, bailing, or grazing in livestock operations. But before planning to use any of these options or others, and reducing corn residue cover after this year's harvest, one of the first things to plan for is the remaining crop residue coverage. With that in mind, producers need to ask themselves a series of questions.


Layer-By-Layer Self -Assembly For Enzyme And Dna Encapsulation And Delivery, Amish Patel Oct 2004

Layer-By-Layer Self -Assembly For Enzyme And Dna Encapsulation And Delivery, Amish Patel

Doctoral Dissertations

Thin wall microcapsules were formed via Layer-by-Layer Self-Assembly of alternate adsorption of oppositely charged polyelectrolyte on microcores. After the core dissolution, empty polymeric shells with 20–25 nm thick walls were obtained. These microcapsules were loaded with Myoglobin, Hemoglobin and Glucose Oxidase by opening capsule pores at low pH and closing them at higher pH. The native structure of the enzyme was not affected due to different treatments. Biocompatible nanoshells were also prepared for encasing DNA. Using the same Layer-by-Layer Self-Assembly approach nanoparticle were constructed containing DNA as one of the layers. The nanoparticles of different architecture were used to ...


Video Companion: Rhythm Of The Seasons... A Journey Beyond Loss, Charles V. Schwab, Shari Burgus, Colleen Jolly Oct 2004

Video Companion: Rhythm Of The Seasons... A Journey Beyond Loss, Charles V. Schwab, Shari Burgus, Colleen Jolly

Agriculture and Environment Extension Publications

Viewer guide, with four activities, to increase personal and community action to prevent farm injuries.

To order the video, see: http://ifasbooks.ufl.edu Search for "Rhythm of the Seasons."


Quantitative Exposure Assessment For Confinement Of Maize Biogenic Systems, Jeffrey D. Wolt, Yuh Yuan Shyy, Paul Christiansen, Karin S. Dorman, Manjit K. Misra Oct 2004

Quantitative Exposure Assessment For Confinement Of Maize Biogenic Systems, Jeffrey D. Wolt, Yuh Yuan Shyy, Paul Christiansen, Karin S. Dorman, Manjit K. Misra

Agricultural and Biosystems Engineering Publications

The development of transgenic crops as production platforms for biogenic agents will largely depend on the success of efforts to confine the genes and their expressed proteins in field environments. We have used quantitative exposure assessment to evaluate how management practices affect materials escape due to outcrossing by pollen flow or grain loss during harvest operations. Specifically, we study the use of maize to produce biogenic agents within field-confined systems. Decision trees representing simplified schemes of fully conforming (designed to comply with current regulatory standards for field confined trials), partially conforming, and non-conforming management practices were developed. Exemplifying assumptions and ...


Holistic Assessment Of Students In Undergraduate Industrial Technology Programs, Dennis W. Field, Steven A. Freeman, Michael J. Dyrenfurth Oct 2004

Holistic Assessment Of Students In Undergraduate Industrial Technology Programs, Dennis W. Field, Steven A. Freeman, Michael J. Dyrenfurth

Agricultural and Biosystems Engineering Publications

No abstract provided.


Student Perceptions Of Web-Based Supplemental Information, Steven A. Freeman, Dennis W. Field Oct 2004

Student Perceptions Of Web-Based Supplemental Information, Steven A. Freeman, Dennis W. Field

Agricultural and Biosystems Engineering Publications

No abstract provided.


Heat And Moisture Production Of Poultry And Their Housing Systems: Pullets And Layers, H. Justin Chepete, Hongwei Xin, Manuel C. Puma, Richard S. Gates Oct 2004

Heat And Moisture Production Of Poultry And Their Housing Systems: Pullets And Layers, H. Justin Chepete, Hongwei Xin, Manuel C. Puma, Richard S. Gates

Agricultural and Biosystems Engineering Publications

Heat and moisture production rates (HP, MP) of modern pullets and laying hens were measured using large-scale indirect calorimeters that mimic commercial production settings. The experimental birds were Hy-Line W-36 strain at 1-5, 10, 21, 37, and 64 weeks of age and Hy-Line W-98 strain at 1-5 weeks of age. Total HP (THP) was partitioned into latent and sensible HP (LHP, SHP) at bird level (excluding moisture evaporation from feces) or room level (including fecal moisture evaporation from feces). The W-98 and W-36 pullets reached their metabolic peak at about 10 and 14 days of age, respectively. The W-98 pullet ...


Heat And Moisture Production Of Poultry And Their Housing Systems: Molting Hens, H. Justin Chepete, Hongwei Xin Oct 2004

Heat And Moisture Production Of Poultry And Their Housing Systems: Molting Hens, H. Justin Chepete, Hongwei Xin

Agricultural and Biosystems Engineering Publications

Heat and moisture production rates (HP, MP) of modern 68- to 75-week-old Hy-Line W-36 laying hens during molting were measured using large-scale indirect calorimeters that mimic commercial production settings. The measurements were performed continuously during acclimation, fasting, restricted feeding, and post-molt. Total HP (THP) was partitioned into latent and sensible HP (LHP, SHP) that incorporated influence of fecal moisture evaporation. THP during fasting (averaging 4.8 W/kg) and restricted feeding (averaging 6.0 W/kg) averaged 29% and 13% lower than that during post-molt (averaging 6.8 W/kg). Correspondingly, LHP averaged 1.9 W/kg and 1.8 ...


Hitch And Go Safely This Harvest Season, Jean Mcguire Sep 2004

Hitch And Go Safely This Harvest Season, Jean Mcguire

Integrated Crop Management News

Each harvest season some loaded wagons go into the ditch due to an inability of the towing vehicle and braking system to control the load. There are a number of reasons that these loads go out of control, according to Mark Hanna and Chuck Schwab, Iowa State University Extension agricultural engineers. "First, some drivers who offer to help reduce the harvest rush are not experienced with towing loads," said Hanna.


Seasonal Aeration Rates For The Eastern United States Based On Long-Term Weather Patterns, Michael D. Montross, Samuel G. Mcneill, Thomas C. Bridges Sep 2004

Seasonal Aeration Rates For The Eastern United States Based On Long-Term Weather Patterns, Michael D. Montross, Samuel G. Mcneill, Thomas C. Bridges

Biosystems and Agricultural Engineering Faculty Publications

Most aeration fans are sized to produce a minimum airflow rate of 0.1 m3/min/t (0.1 cfm/bu) in on-farm grain storage structures. At this airflow rate a significant amount of time is required to move a cooling front completely through a bin. The desired grain temperature and prevailing weather conditions will have a significant effect on required fan size. Thirty years of weather data were analyzed for the eastern United States to determine the amount of time available in temperature windows between 0 to 15.C and 0 to 17.C. Contour maps were generated ...


Immunogold Labeling To Enhance Contrast In Optical Coherence Microscopy Of Tissue Engineered Corneal Constructs, Chris B. Raub, Elizabeth J. Orwin, Richard C. Haskell Sep 2004

Immunogold Labeling To Enhance Contrast In Optical Coherence Microscopy Of Tissue Engineered Corneal Constructs, Chris B. Raub, Elizabeth J. Orwin, Richard C. Haskell

All HMC Faculty Publications and Research

Our lab has used an optical coherence microscope (OCM) to assess both the structure of tissue-engineered corneal constructs and their transparency. Currently, we are not able to resolve cells versus collagen matrix material in the images produced. We would like to distinguish cells in order to determine if they are viable while growing in culture and also if they are significantly contributing to the light scattering in the tissue. In order to do this, we are currently investigating the use of immunogold labeling. Gold nanoparticles are high scatterers and can create contrast in images. We have conjugated gold nanoparticles to ...


Vertical Wall Loads In A Model Grain Bin With Non-Axial Internal Inserts, Marek Molenda, Michael D. Montross, Jozef Horabik, Sidney A. Thompson Sep 2004

Vertical Wall Loads In A Model Grain Bin With Non-Axial Internal Inserts, Marek Molenda, Michael D. Montross, Jozef Horabik, Sidney A. Thompson

Biosystems and Agricultural Engineering Faculty Publications

A study was conducted to estimate the degree of load asymmetry in a bin with non-axial internal inserts. Internal inserts in the form of an annulus segment were attached to the wall, and their influence on vertical wall loads during centric filling and discharge in a model bin were measured. Wall and floor loads were measured in a corrugated-wall model grain bin with a diameter of 2.44 m and a height of 7.3 m filled with soft red winter wheat to a depth of 6.7 m (height-to-diameter ratio of 2.75). Tests were conducted with inserts that ...


Integrated Drainage-Wetland Systems For Reducing Nitrate Loads From Tile Drained Landscapes, William G. Crumpton, Matthew J. Helmers Sep 2004

Integrated Drainage-Wetland Systems For Reducing Nitrate Loads From Tile Drained Landscapes, William G. Crumpton, Matthew J. Helmers

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

In addition to raising local water quality concerns, nitrate loads from Midwest agriculture are suspected as a primary contributor to hypoxia in the Gulf of Mexico. Over-application of fertilizer can exacerbate the problem, but the major causes are hydrological and land-use changes that came with tile drainage. Subsurface drainage creates very productive croplands and reduces water quality problems associated with surface runoff, but subsurface flow and nitrate transport are substantially increased. A permanent solution to the environmental problem of hypoxia in the Gulf of Mexico will likely require more than improved nitrogen management and tillage practices. We present results of ...


The Role Of Pasture In Conservation Management, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman Aug 2004

The Role Of Pasture In Conservation Management, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman

Integrated Crop Management News

Pasture is a longtime and significant part of Iowa agriculture and is a critical component of the state's agricultural landscape. The main function of pasture is as a primary support system for livestock. It can affect conservation and the environmental planning in several ways, including soil carbon storage, soil quality, and water quality. The effect of livestock on such parameters is highly significant depending on the way livestock and pasture are managed. Therefore, pasture management does play an important role in a farming operation's overall conservation management plan.


Evaluation Of Sample Recovery Of Malodorous Gases From Air Sampling Bags, Spme, And Sampling Canisters, Jacek A. Koziel, Jarett P. Spinhirne, Jenny D. Lloyd, David B. Parker, Donald W. Wright, David K. Eaton, Lawrence T. Nielsen Aug 2004

Evaluation Of Sample Recovery Of Malodorous Gases From Air Sampling Bags, Spme, And Sampling Canisters, Jacek A. Koziel, Jarett P. Spinhirne, Jenny D. Lloyd, David B. Parker, Donald W. Wright, David K. Eaton, Lawrence T. Nielsen

Jacek A. Koziel

Odorous gases associated with livestock operations are complex mixtures of hundreds if not thousands of compounds. Research is needed to know how best to sample and analyze these compounds. The main objective of this research was to compare recoveries of a standard gas mixture of 11 odorous compounds from the Carboxen/PDMS 75 µ m SPME fibers, PVF (Tedlar), FEP (Teflon), foil, and PET (Melinex) air sampling bags, and standard 6 L Stabilizer™ sampling canisters after sample storage at room temperature. A standard mixture consisted of 7 VFAs from acetic to hexanoic, and 4 semi-VOCs including p-cresol, indole, 4-ethylphenol, and ...


Comparison Of Measured And Modeled Ambient Hydrogen Sulfide Concentrations Near A 4000 Head Swine Facility, David R. Schmidt, Lakshmi Koppolu, Gregory C. Pratt, Larry D. Jacobson, Dennis D. Schulte, Steven J. Hoff, Mara Moscato Aug 2004

Comparison Of Measured And Modeled Ambient Hydrogen Sulfide Concentrations Near A 4000 Head Swine Facility, David R. Schmidt, Lakshmi Koppolu, Gregory C. Pratt, Larry D. Jacobson, Dennis D. Schulte, Steven J. Hoff, Mara Moscato

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Air dispersion models are currently being used to regulate agriculture facilities and/or assess their environmental impact. As such, it is critical that these models accurately reflect these impacts. Meteorological conditions, hydrogen sulfide emissions, and downwind hydrogen sulfide concentrations at a four barn, 4000-head, swine finishing facility in Northeast Iowa were measured for a three week period in October 2003. Meteorological conditions and hydrogen sulfide emissions from the barns were used as inputs into two air dispersion models, INPUFF-2 and AERMOD. Model results were compared to measured results at eighteen receptor locations. Results indicate the models did not accurately predict ...


Evaluation Of Ion-Selective Membranes For Real-Time Soil Macronutrients Sensing, Hak-Jin Kim, John W. Hummel, Stuart J. Birrell Aug 2004

Evaluation Of Ion-Selective Membranes For Real-Time Soil Macronutrients Sensing, Hak-Jin Kim, John W. Hummel, Stuart J. Birrell

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

On-the-go, real-time soil nutrient analysis would be useful in the site-specific management of soil fertility. The rapid response and low sample volume associated with ion-selective field effect transistors (ISFETs) make them good soil fertility sensor candidates. An important component of the ion-selective microelectrode technology is an ion-selective membrane that responds selectively to one analyte in the presence of other ions in a solution. This paper describes the evaluation of nitrate and potassium ion-selective membranes and the investigation of the interaction between the ion-selective membranes and soil extracting solutions to identify membranes and extracting solutions that are compatible for use with ...


Nitrification Inhibitor And Nitrogen Application Timing Effects On Yields And Nitrate-Nitrogen Concentrations In Subsurface Drainage From A Corn-Soybean Rotation, Peter A. Lawlor, James L. Baker, Stewart W. Melvin, Matthew J. Helmers Aug 2004

Nitrification Inhibitor And Nitrogen Application Timing Effects On Yields And Nitrate-Nitrogen Concentrations In Subsurface Drainage From A Corn-Soybean Rotation, Peter A. Lawlor, James L. Baker, Stewart W. Melvin, Matthew J. Helmers

Agricultural and Biosystems Engineering Conference Proceedings and Presentations

Excess precipitation in Iowa and many other agricultural production areas is removed artificially via subsurface drainage systems that intercept and usually divert it to surface waters. Nitrogen, either applied as fertilizer or manure and derived from soil organic matter, can be carried as nitrate with the excess water in quantities that can cause deleterious effects downstream. A four-year, five-replication, field study was initiated in the fall of 1999 in Pocahontas County, Iowa on 0.05 ha plots that are predominantly Nicollet, Webster, and Canisteo clay loams with 3-5% organic matter. The objective was to determine the influence of seasonal N ...


Application Rate And Timing Effects On Urease Inhibitor Performance For Minimizing Ammonia Emissions From Beef Cattle Feedyards, David B. Parker, Syam Pandrangi, L. Wayne Greene, Lal K. Almas, N. Andy Cole, Marty B. Rhoades, Jacek A. Koziel Aug 2004

Application Rate And Timing Effects On Urease Inhibitor Performance For Minimizing Ammonia Emissions From Beef Cattle Feedyards, David B. Parker, Syam Pandrangi, L. Wayne Greene, Lal K. Almas, N. Andy Cole, Marty B. Rhoades, Jacek A. Koziel

Jacek A. Koziel

A laboratory study was conducted to evaluate how rate and timing of urease inhibitor application affects ammonia emissions from simulated beef cattle feedyard surfaces. The urease inhibitor N-(n-butyl)thiophosphoric triamide (NBPT) was applied at rates of 0, 1 and 2 kg/ha, at 8, 16, and 32 day frequencies, and with or without simulated rainfall. Synthetic urine was added every 2 days to the manure surface. Gaseous NH3 was trapped in a sulfuric acid solution using a vacuum system and analyzed for nitrogen using automated procedures. NBPT applied every 8 days was most effective, with the 1 and 2 ...


Comparison Of Vrt Granular Applicators, John P. Fulton, Scott A. Shearer, Steven F. Higgins, Timothy S. Stombaugh, Matthew J. Darr, Dennis W. Hancock, Edward L. Hutchins Aug 2004

Comparison Of Vrt Granular Applicators, John P. Fulton, Scott A. Shearer, Steven F. Higgins, Timothy S. Stombaugh, Matthew J. Darr, Dennis W. Hancock, Edward L. Hutchins

Matthew J. Darr

Granular applicators equipped with variable-rate technology have gained popularity in recent years due to increased interests in variable-rate application. The purpose of this investigation was to characterize distribution patterns at varying rates and quantify rate transitions from various granular applicators. Both uniform- and variable-rate tests were conducted to assess the accuracy of variable-rate application from four granular applicators (2 spinner spreaders and 2 pneumatic applicators). The patterns results indicated a consistent triangular pattern for spinner spreader B and consistent patterns for pneumatic applicators C and D. However, applicator D produced pattern variations at the center and right side. Simulated overlap ...


Ambient Ammonia And Hydrogen Sulfide Concentrations At A Beef Cattle Feedlot In Texas, Jacek A. Koziel, Bok-Haeng Baek, Jarett P. Spinhirne, David B. Park Aug 2004

Ambient Ammonia And Hydrogen Sulfide Concentrations At A Beef Cattle Feedlot In Texas, Jacek A. Koziel, Bok-Haeng Baek, Jarett P. Spinhirne, David B. Park

Jacek A. Koziel

Concentrations of ammonia (NH3) and hydrogen sulfide (H2S) in ambient air were semicontinuously measured at a 50,000-head cattle feedyard in Texas panhandle in three seasons: fall 2002 (10 days), winter 2003 (14 days), and spring 2003 (15 days). Sampling was conducted at 1.5 m above the ground at one location each season at the western fence line of cattle pens. Gas concentrations were measured using continuous analyzers housed in an onsite instrument shelter. Measured concentrations were upwind or downwind of the feedyard pens depending on the wind direction. Wind directions, wind velocity, and air temperature were measured to ...