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2003

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Articles 1 - 30 of 2102

Full-Text Articles in Life Sciences

A New Species Of Neoscelis From Jalisco, Mexico (Coleoptera: Scarabaeidae: Cetoniinae), Alan D. Mudge, Brett C. Ratcliffe, Richard L. Westcott, Felipe A. A. Noguera Dec 2003

A New Species Of Neoscelis From Jalisco, Mexico (Coleoptera: Scarabaeidae: Cetoniinae), Alan D. Mudge, Brett C. Ratcliffe, Richard L. Westcott, Felipe A. A. Noguera

Papers in Entomology

Neoscelis coracina Mudge et Ratcliffe sp. n., from Jalisco, Mexico, is described and illustrated. Intraspecific variation is discussed, and diagnostic characters separating N. coracina sp. n. from N. dohrni (Westwood, 1855) are given. The key to males of New World Goliathini is revised. Notes on habitat, behavior, and collecting N. coracina sp. n. are included. A new state record is provided for N. dohrni.


Natural Resources Outreach Coalition: Coordination And Program Delivery, Frank Mitchell Dec 2003

Natural Resources Outreach Coalition: Coordination And Program Delivery, Frank Mitchell

PREP Reports & Publications

The Natural Resources Outreach Coalition (NROC) is a multi-organizational initiative providing technical and educational assistance to communities in New Hampshire’s coastal watersheds dealing with the effects of growth. The NROC program offered to communities includes an initial educational public presentation, Dealing with Growth, followed by a series of follow-up meetings to help the community develop an action-oriented work plan, and provide the technical and educational assistance needed to help the community meet its goals.


Nonmuscle Myosin Iib Is Involved In The Guidance Of Fibroblast Migration, Chun-Min Lo, Denis B. Buxton, Gregory C. H. Chua, Micah Dembo, Robert S. Adelstein, Yu-Li Wang Dec 2003

Nonmuscle Myosin Iib Is Involved In The Guidance Of Fibroblast Migration, Chun-Min Lo, Denis B. Buxton, Gregory C. H. Chua, Micah Dembo, Robert S. Adelstein, Yu-Li Wang

Open Access Articles

Although myosin II is known to play an important role in cell migration, little is known about its specific functions. We have addressed the function of one of the isoforms of myosin II, myosin IIB, by analyzing the movement and mechanical characteristics of fibroblasts where this protein has been ablated by gene disruption. Myosin IIB null cells displayed multiple unstable and disorganized protrusions, although they were still able to generate a large fraction of traction forces when cultured on flexible polyacrylamide substrates. However, the traction forces were highly disorganized relative to the direction of cell migration. Analysis of cell migration ...


Collaborative Research: Origins Of Cods On Georges Bank: Contributions Of Early Developmental Stages For The Scotian Shelf, David W. Townsend, Irv Kornfield, Linda Kling Dec 2003

Collaborative Research: Origins Of Cods On Georges Bank: Contributions Of Early Developmental Stages For The Scotian Shelf, David W. Townsend, Irv Kornfield, Linda Kling

University of Maine Office of Research Administration: Grant Reports

Recent work in the Georges Bank-Gulf of Maine area has documented significant, and apparently episodic, fluxes of Scotian Shelf Water (SSW) from the Nova Scotian continental shelf to Georges Bank. SSW is a relatively cold and fresh water mass with a significant component from the St. Lawrence River, and is commonly identifiable with temperature-salinity analyses of hydrographic data and in satellite images of sea surface temperature. One such flux episode was observed last March (1997) in satellite imagery and from shipboard hydrographic sampling on Georges Bank. Qualitative at-sea analyses of ichthyoplankton sampled on the March cruise revealed a remarkably tight ...


Support For The 3rd Annual Exeter River Alewife Festival, Exeter River Local Advisory Committee Dec 2003

Support For The 3rd Annual Exeter River Alewife Festival, Exeter River Local Advisory Committee

PREP Reports & Publications

With support from the NH Estuaries Project (NHEP), the Exeter River Local Advisory Committee (ERLAC) held the 3rd Annual Exeter River Alewife Festival on May 31, 2003 in downtown Exeter. NHEP funding enabled ERLAC and the Festival Planning Committee to print and distribute posters and cards advertising the Festival, purchase newspaper advertisements and arrange opportunities for the press to learn more about the event. In addition, ERLAC members worked with area newspapers to write and print eleven articles highlighting aspects of the river and the watershed.


Gbcw Support For Shellfish Activities 2003, B Sharon Meeker, Ann S. Reid Dec 2003

Gbcw Support For Shellfish Activities 2003, B Sharon Meeker, Ann S. Reid

PREP Reports & Publications

The Great Bay Coast Watch (GBCW) is a volunteer estuarine monitoring program established in 1989 that includes teachers, students, and local citizens with a diversity of backgrounds. Volunteers participate in a variety of training programs that enable them to monitor water quality parameters in Great Bay and coastal areas, sample for marine phytoplankton blooms and conduct shoreline surveys and habitat evaluations. Since 1997 the New Hampshire Estuaries Project (NHEP) has relied on the ability of GBCW to recruit and train volunteers to assist with the implementation of its plan to protect, restore and manage the states estuarine systems. This year ...


Soil Organic Carbon Content And Composition Of 130-Year Crop, Pasture And Forest Land-Use Managements, Dean A. Martens, Thomas E. Reedy, David T. Lewis (Retired) Dec 2003

Soil Organic Carbon Content And Composition Of 130-Year Crop, Pasture And Forest Land-Use Managements, Dean A. Martens, Thomas E. Reedy, David T. Lewis (Retired)

Agronomy & Horticulture -- Faculty Publications

Conversion of former agricultural land to grassland and forest ecosystems is a suggested option for mitigation of increased atmospheric CO2. A Sharpsburg prairie loess soil (fine, smectitic, mesic Typic Argiudoll) provided treatments to study the impact of long-term land use on soil organic carbon (SOC) content and composition for a 130-year-old cropped, pasture and forest comparison. The forest and pasture land use significantly retained more SOC, 46% and 25%, respectively, compared with cropped land use, and forest land use increased soil C content by 29% compared with the pasture. Organic C retained in the soils was a function of ...


Self-Aligned Mechanical Attachment Of Carbon Nanotubes To Silicon Dioxide Structures By Selective Silicon Dioxide Chemical-Vapor Deposition, Jed D. Whittaker, Ghaleb A. Husseini, Matthew A. Linford, Robert C. Davis, Markus Brink Dec 2003

Self-Aligned Mechanical Attachment Of Carbon Nanotubes To Silicon Dioxide Structures By Selective Silicon Dioxide Chemical-Vapor Deposition, Jed D. Whittaker, Ghaleb A. Husseini, Matthew A. Linford, Robert C. Davis, Markus Brink

Faculty Publications

A self-aligned thin-film deposition technique was developed to mechanically attach carbon nanotubes to surfaces for the fabrication of structurally robust nanotube-based nanomechanical devices. Single-walled carbon nanotubes were grown by thermal chemical-vapor deposition (CVD) across 150-nm-wide SiO2 trenches. The nanotubes were mechanically attached to the trench tops by selective silicon tetraacetate-based SiO2 CVD. No film was deposited on the nanotubes where they were suspended across the trenches.


Swine Waste Demonstration And Training Project, C. V. Maxwell, K. Vandevender, K. P. Coffey, P. A. Moore, I. Chaubey, D. R. Smith Dec 2003

Swine Waste Demonstration And Training Project, C. V. Maxwell, K. Vandevender, K. P. Coffey, P. A. Moore, I. Chaubey, D. R. Smith

Technical Reports

No abstract provided.


The Dynastine Scarab Beetles Of Costa Rica And Panama (Coleoptera: Scarabaeidae: Dynastinae), Brett C. Ratcliffe Dec 2003

The Dynastine Scarab Beetles Of Costa Rica And Panama (Coleoptera: Scarabaeidae: Dynastinae), Brett C. Ratcliffe

Bulletin of the University of Nebraska State Museum

The 157 species of dynastine scarab beetles that occur in Costa Rica and Panama are comprehensively reviewed. Keys, descriptions, distributions, and notes on biology are provided for all species as well as illustrations and maps. The larvae of Enema endymion, Heterogomphus chevrolati, and Dynastes hercules are described for the first time. Also included are synopses of the higher-level taxa, a glossary, a gazetteer of place names, and a species checklist.

The following new species are described: Cyclocephala alazona, C. enigma, C. labidion, C. marylizae, C. mustacha, C. stockwelli, C. una mas (all Cyclocephalini); Irazua dilicra (Oryctini); Amblyoproctus centroamericanus, Hemiphileurus curoei ...


Seasonal Variation And Ecosystem Dependence Of Emission Factors For Selected Trace Gases And Pm2.5 For Southern African Savanna Fires, S. Korontzi, Darold E. Ward, Ronald A. Susott, Robert J. Yokelson, C. O. Justice, Peter V. Hobbs, E.A. H. Smithwick, Wei Min Hao Dec 2003

Seasonal Variation And Ecosystem Dependence Of Emission Factors For Selected Trace Gases And Pm2.5 For Southern African Savanna Fires, S. Korontzi, Darold E. Ward, Ronald A. Susott, Robert J. Yokelson, C. O. Justice, Peter V. Hobbs, E.A. H. Smithwick, Wei Min Hao

Chemistry and Biochemistry Faculty Publications

[1] In this paper we present the first early dry season (early June-early August) emission factor measurements for carbon dioxide (CO2), carbon monoxide (CO), methane (CH4), nonmethane hydrocarbons (NMHC), and particulates with a diameter less than 2.5 μm (PM2.5) for southern African grassland and woodland fires. Seasonal emission factors for grassland fires correlate linearly with the proportion of green grass, used as a surrogate for the fuel moisture content, and are higher for products of incomplete combustion in the early part of the dry season compared with later in the dry season. Models of emission ...


Northeast Research Station Watertown, South Dakota Annual Progress Report, 2003, Agricultural Experiment Station, Plant Science Department Dec 2003

Northeast Research Station Watertown, South Dakota Annual Progress Report, 2003, Agricultural Experiment Station, Plant Science Department

Agricultural Experiment Station and Research Farm Annual Reports

This is the 2003 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes weather data, yield comparisons, crop performance trials, corn trials, soybean trials, winter wheat performance testing, Barley Foliar information, weed and pest control, herbicide demonstrations, canola and flax variety trials and more.


Assembly Of Α4Β2 Nicotinic Acetylcholine Receptors Assessed With Functional Fluorescently Labeled Subunits: Effects Of Localization, Trafficking, And Nicotine-Induced Upregulation In Clonal Mammalian Cells And In Cultured Midbrain Neurons, Raad Nashmi, Mary E. Dickinson, Sheri Mckinney, Mark Jareb, Cesar Labarca, Scott E. Fraser E. Fraser, Henry A. Lester Dec 2003

Assembly Of Α4Β2 Nicotinic Acetylcholine Receptors Assessed With Functional Fluorescently Labeled Subunits: Effects Of Localization, Trafficking, And Nicotine-Induced Upregulation In Clonal Mammalian Cells And In Cultured Midbrain Neurons, Raad Nashmi, Mary E. Dickinson, Sheri Mckinney, Mark Jareb, Cesar Labarca, Scott E. Fraser E. Fraser, Henry A. Lester

Biology Faculty Publications

Fura-2 recording of Ca2+ influx was used to show that incubation in 1 μM nicotine (2–6d) upregulates several pharmacological components of acetylcholine (ACh) responses in ventral midbrain cultures, including a MLA-resistant, DHβE-sensitive component that presumably corresponds to α4β2 receptors. To study changes in α4β2 receptor levels and assembly during this upregulation, we incorporated yellow and cyan fluorescent proteins (YFPs and CFPs) into the α4 or β2 M3–M4 intracellular loops, and these subunits were coexpressed in human embryonic kidney (HEK) 293T cells and cultured ventral midbrain neurons ...


Lambda Red-Mediated Recombinogenic Engineering Of Enterohemorrhagic And Enteropathogenic E. Coli, Kenan C. Murphy, Kenneth Geno Campellone Dec 2003

Lambda Red-Mediated Recombinogenic Engineering Of Enterohemorrhagic And Enteropathogenic E. Coli, Kenan C. Murphy, Kenneth Geno Campellone

Open Access Articles

BACKGROUND: The lambda Red recombineering technology has been used extensively in Escherichia coli and Salmonella typhimurium for easy PCR-mediated generation of deletion mutants, but less so in pathogenic species of E. coli such as EHEC and EPEC. Our early experiments with the use of lambda Red in EHEC and EPEC have led to sporadic results, leading to the present study to identify factors that might improve the efficiency of Red recombineering in these pathogenic strains of E. coli. RESULTS: In this report, we have identified conditions that optimize the use of lambda Red for recombineering in EHEC and EPEC. Using ...


Evaluation Of Gene Expression In Pigs Selected For Enhanced Reproduction Using Differential Display Pcr: Ii. Anterior Pituitary, G. R. Bertani, C. D. Gladney, R. K. Johnson, Daniel Pomp Dec 2003

Evaluation Of Gene Expression In Pigs Selected For Enhanced Reproduction Using Differential Display Pcr: Ii. Anterior Pituitary, G. R. Bertani, C. D. Gladney, R. K. Johnson, Daniel Pomp

Faculty Papers and Publications in Animal Science

The objective of this study was to identify differentially expressed genes in the anterior pituitary (AP) of sows selected for enhanced reproductive phenotypes. Selection in the Index (I) line was based on an index of ovulation rate and embryo survival, whereas random selection was used in the Control (C) line. Average numbers of fully formed piglets at birth were 12.5 ± 1.5 and 9.9 ± 2.0 for Line I and C sows used in this study, respectively. In order to induce luteolysis and synchronize follicle development, sows were injected (i.m.) with 2 mL of prostaglandin F2α ...


The National Pork Producers Council Maternal Line National Genetic Evaluation Program: A Comparison Of Six Maternal Genetic Lines For Female Productivity Measures Over Four Parities, J. S. Moeller, R. K. Johnson, J. W. Mabry, T. J. Baas, O. W. Robison Dec 2003

The National Pork Producers Council Maternal Line National Genetic Evaluation Program: A Comparison Of Six Maternal Genetic Lines For Female Productivity Measures Over Four Parities, J. S. Moeller, R. K. Johnson, J. W. Mabry, T. J. Baas, O. W. Robison

Faculty Papers and Publications in Animal Science

Litter (n = 8,424) and female performance records were collected in two breed-to-wean production units in order to evaluate genetic line differences for sow longevity and maternal performance over four parities. Lines evaluated were American Diamond Genetics, Danbred North America, Dekalb-Monsanto DK44, Dekalb-Monsanto GPK347, Newsham Hybrids, and National Swine Registry. Females within a line were derived from a minimum of 65 sires, 197 dams (three dams per sire), and a maximum of three daughters per dam, except in the GPK347, which were produced using semen from 12 Nebraska Index boars mated with Dekalb-Monsanto Line 34 females. All lines expressed 100 ...


Segregating Transgenic Grains: Results Of A Survey Among Country Elevators In South Dakota, Bashir Qasmi, Clayton J. Wilhelm, Evert Van Der Sluis Dec 2003

Segregating Transgenic Grains: Results Of A Survey Among Country Elevators In South Dakota, Bashir Qasmi, Clayton J. Wilhelm, Evert Van Der Sluis

Economics Research Reports

In 2002, cash receipts from crop production in South Dakota totaled $1.76 billion, accounting for 38 % of all receipts of agricultural producers in the state (South Dakota Agricultural Statistics Service, 2003). The three most important crops grown in South Dakota are soybeans, corn, and wheat. In 2001, South Dakota ranked 8th in the production of corn and soybean and 9th in wheat production among the nation's crop producing states (South Dakota Agricultural Statistics Service, 2003). These three crops accounted for 86 % of all cash receipts from marketing crops in the state. Due to the state's reliance on ...


West River Ag Center Crops And Soils Research Annual Progress Report, 2003, Agricultural Experiment Station Dec 2003

West River Ag Center Crops And Soils Research Annual Progress Report, 2003, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This is the 2003 progress report of the West River Crops and Soils Research Projects, South Dakota Agricultural Experiment Station. This document includes reports on: weather and climate, wheat and grain variety trials, management and tillage, and weed and pest control.


Crop Advantage Series Offers Local Topics For Producers, Brent A. Pringnitz Dec 2003

Crop Advantage Series Offers Local Topics For Producers, Brent A. Pringnitz

Integrated Crop Management News

If you are concerned about soybean aphids, next season's weather, and about what you can do to become a better crop producer, plan to attend the Iowa State University's Crop Advantage Series in 2004. ISU Extension is offering the third annual series of statewide conferences for farmers and agribusiness professionals. The program has expanded and will be at 10 different locations in Iowa, between January 5 and 22.


Spots Available At The Webgro Training Workshops, William D. Batchelor Dec 2003

Spots Available At The Webgro Training Workshops, William D. Batchelor

Integrated Crop Management News

The genetic yield potential of soybeans in the Midwestern United States is estimated to be approximately 100 bushels per acre, based on results from small-plot studies. However, field and statewide average yields are much lower. Soybean yield is the result of complex interactions between genetics, management, environment, fertility, and stresses. Water stress is often viewed as the biggest underlying factor resulting in yield loss. However, other factors such as soybean cyst nematodes, Rhizoctonia root rot, and hail damage can also cause significant injury to soybean yields.


Icm Conference Proceedings Now On Sale, Brent A. Pringnitz Dec 2003

Icm Conference Proceedings Now On Sale, Brent A. Pringnitz

Integrated Crop Management News

Proceedings from the 2003 Integrated Crop Management Conference are now on sale. The proceedings is a collection of manuscripts submitted by each of the presenters at the conference outlining the research and information they presented. The 245-page volume is available for $15 plus $2.50 shipping and handling. Order forms are available here, by sending an e-mail to aep@iastate.edu, or calling the Agribusiness Education Program at (515) 294-6429.


2003 Soybean Disease And Future Management, X. B. Yang Dec 2003

2003 Soybean Disease And Future Management, X. B. Yang

Integrated Crop Management News

Diseases are an important factor in our management to stabilize soybean yield. Weather in a growing season dictates the types of disease outbreaks. In the past 10 years, outbreaks of diseases have varied from season to season and 2003 was no exception. Early in the season, rainfall was excessive and some fields were flooded. There were reports on occurrence of Phytophthora and seedling diseases in Iowa. Cool and wet early summer was also favorable to white mold infections and the disease appeared in eastern Iowa with reported infections over 70 percent diseased plants in some fields.


Looking Back At The 2003 Growing Season, Palle Pedersen Dec 2003

Looking Back At The 2003 Growing Season, Palle Pedersen

Integrated Crop Management News

Now looking back at the 2003 growing season, who would have thought that it would turn out the way it did? I think that we all got challenged in many unexpected ways and we definitely learned a lot. One thing for sure, many do often underestimate "mother nature" but after the 2003 growing season, I think that we all can agree that no management practice can match "her" power. Another thing that we learned was that different seasons have different pests and pathogens. The interactions between a host, the environment, and a pathogen or pest couldn't have been clearer ...


Crop Rotation Considerations For 2004 Management Season Rotation, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman Dec 2003

Crop Rotation Considerations For 2004 Management Season Rotation, Mahdi Al-Kaisi, H. Mark Hanna, Michael Tidman

Integrated Crop Management News

There are many management strategies for improving soil productivity. Crop rotation or cropping sequence is proven to be very effective in addressing concerns related to soil, water, and environment quality from long- or short-term perspectives. Producers who are innovative in diversifying their cropping systems and management strategies will be more successful than others who are not.


Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 2003, Agricultural Dec 2003

Central Crops And Soils Research Station Highmore, South Dakota: Annual Progress Report, 2003, Agricultural

Agricultural Experiment Station and Research Farm Annual Reports

This report of the Central Crops and Soils Research Station at Highmore, South Dakota reflects the 2003 growing season. This document includes data on: temperatures and precipitation, field evaluation of woody plant materials, alfalfa production, winter wheat, oat research, spring wheat breeding, resistance of sunflower germplasm to the red sunflower seed weevil, flax variety test, weed control, fertilizer and soil test on soybeans, aphid infestations, small grain variety test, and corn breeding.


Value And Use Of Corn Milling By-Products In The Cow Herdv, Richard J. Rasby, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams Dec 2003

Value And Use Of Corn Milling By-Products In The Cow Herdv, Richard J. Rasby, Galen E. Erickson, Terry J. Klopfenstein, Don C. Adams

Range Beef Cow Symposium

There are many different grain by-products available for cow/calf producers to use in rations. Grain by-products such as wheat mids, soy hulls, and cottonseed hulls have been available for many years and have been used effectively in cow diets and supplements. More recent grain by-products have come from the production of fructose (wet or dry corn gluten feed) or ethanol (wet or dry distillers grains). This paper will focus on by-product of corn milling industry. This paper will discuss the wet and dry milling process, product quality, nutrient quality, and research on use by beef cattle.


Effects Of Water Quality On Beef Cattle, Trey Patterson, Pat Johnson Dec 2003

Effects Of Water Quality On Beef Cattle, Trey Patterson, Pat Johnson

Range Beef Cow Symposium

Producers often invest a great deal of time and money in developing nutrition and grazing strategies for their cattle. It is often taken for granted that if water is available, cattle productivity can be maintained. This is not always the case. The quality of water available to cattle can have substantial impacts on productivity. Much of the water available to cattle in South Dakota, and other parts of the United States, is not sufficient in quality to sustain performance and health of cattle.

Field observations from our laboratory since 1999 have shown both surface and subsurface water to be high ...


Making Sense Of Mineral Supplementation, Cody L. Wright Dec 2003

Making Sense Of Mineral Supplementation, Cody L. Wright

Range Beef Cow Symposium

Mineral nutrition is one of the most complicated and least understood components of nutrition. For years, producers and researchers alike have known about the need for mineral supplementation; however, development of mineral supplements to meet the requirements of grazing cattle often becomes a difficult and challenging problem due to 1) changes in animal requirements with stage and level of production, 2) difference in forage supply of minerals, and 3) methods to supply cost-effective supplemental minerals that ensure adequate intake and bioavailability (Greene, 1999).


Macro Influences On The Beef Business, Wayne D. Purcell Dec 2003

Macro Influences On The Beef Business, Wayne D. Purcell

Range Beef Cow Symposium

There are many major economic focuses at work in the sector. In late 2003, a start to the herd building phase of the cattle cycle is imminent. Export markets are coming back after faltering during 2002, and beef demand, domestic and international, is growing again. We have not seen the combination of heifer holdback to build the herd, which will reduce per capita beef supplies, and increased demand for beef since the early 1970’s. Unless corn prices surge, and this is unlikely, calf prices will go above $1.00 and generally stay there for the next several years—perhaps ...


Developing Replacement Heifers: Recent Research Findings On Target Weights And Fat Supplementation, Richard N. Funston, Gene H. Deutscher Dec 2003

Developing Replacement Heifers: Recent Research Findings On Target Weights And Fat Supplementation, Richard N. Funston, Gene H. Deutscher

Range Beef Cow Symposium

Proper development of replacement heifers is critical. Heifers should be managed to reach puberty early, conceive early in the first breeding season, calve unassisted, and breed back early for their second calf. This development needs to be accomplished at low costs without sacrificing performance. Previous studies (Patterson et al., 1992) indicate puberty can be expected to occur at a genetically predetermined size among individual animals; and only when heifers reach predetermined target weights can high pregnancy rates be obtained. Recommended guidelines generally have been 60 to 66% of mature weight in beef heifers, depending on frame size (Patterson et al ...