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2001

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Articles 1 - 30 of 3138

Full-Text Articles in Life Sciences

Deletions In The 7a Orf Of Feline Coronavirus Associated With An Epidemic Of Feline Infectious Peritonitis, Melissa Kennedy, N Boedeker, P Gibbs, Stephen Kania Mar 2012

Deletions In The 7a Orf Of Feline Coronavirus Associated With An Epidemic Of Feline Infectious Peritonitis, Melissa Kennedy, N Boedeker, P Gibbs, Stephen Kania

Stephen A Kania

A population of Persian cats experienced an epidemic of feline infectious peritonitis (FIP) over 2 years. Twelve cases of FIP occurred in litters born during this period. Cats contracting FIP were all genetically related through the sire. Feline coronavirus (FCoV) genomic RNA was detected consistently in this study in biologic samples from adult cats, kittens suffering from FIP, and their siblings. Analysis of viral 7a/7b open reading frame (ORFs) were analyzed and revealed two distinct virus variants circulating in the population, one with an intact 7a ORF and one with two major deletions in the 7a ORF. The 7b ...


Detection Of Feline Coronavirus Infection In Captive Cheetahs (Acinonyx Jubatus) By Polymerase Chain Reaction, Melissa Kennedy, S Citino, T Dolorico, A Mcnabb, A Moffat, Stephen Kania Mar 2012

Detection Of Feline Coronavirus Infection In Captive Cheetahs (Acinonyx Jubatus) By Polymerase Chain Reaction, Melissa Kennedy, S Citino, T Dolorico, A Mcnabb, A Moffat, Stephen Kania

Stephen A Kania

Feline coronavirus genetic elements were detected by polymerase chain reaction from blood, fecal samples, and effusive fluid collected from 33 cheetahs in the U.S.A. Feline coronavirus-specific serum antibodies were also measured by indirect immunofluorescence. Ten cheetahs were positive for viral shedding by polymerase chain reaction, whereas 13 were seropositive by immunofluorescence. Results of serology did not consistently correlate with shedding of virus, and the capture antigen used for detection of feline coronavirus-specific antibodies had a significant impact on results. Testing of samples from one population over a 1-yr period indicated chronic infection in some animals. These relatively healthy ...


Will Theaters Receive Two Thumbs Up From Individuals With Disabilities?, Joseph H. Huber Dec 2001

Will Theaters Receive Two Thumbs Up From Individuals With Disabilities?, Joseph H. Huber

Movement Arts, Health Promotion and Leisure Studies Faculty Publications

No abstract provided.


Molecular Mechanisms Involved In Human Platelet Aggregation By Synergistic Interaction Of Platelet-Activating Factor And 5-Hydroxytryptamine, B H. Shah, H Rasheed, I H. Rahman, A H. Shariff, F L. Khan, H B. Rahman, S Hanif, S A. Saeed Dec 2001

Molecular Mechanisms Involved In Human Platelet Aggregation By Synergistic Interaction Of Platelet-Activating Factor And 5-Hydroxytryptamine, B H. Shah, H Rasheed, I H. Rahman, A H. Shariff, F L. Khan, H B. Rahman, S Hanif, S A. Saeed

Department of Biological & Biomedical Sciences

Our recent studies have shown that co-activation of Gq and Gi proteins by 5-hydroxytryptamine (5-HT) and adrenaline show synergism in human platelet aggregation. This study was conducted to examine the mechanism(s) of synergistic interaction of 5-HT and platelet activating factor (PAF) in human platelets. We show that PAF, but not 5-HT, increased platelet aggregation in a concentration-dependent manner. However, low concentrations of 5-HT (2 microM) potentiated platelet aggregation induced by subthreshold concentration of PAF (40 nM) indicating a synergistic interaction between the two agonists and this synergism was blocked by receptor antagonists to either 5-HT or PAF. 5-HT also ...


Detectability Of Excitatory Vs. Inhibitory Drive In A Thalamocortical Relay Neuron Model., Gregory D. Smith, S Murray Sherman Dec 2001

Detectability Of Excitatory Vs. Inhibitory Drive In A Thalamocortical Relay Neuron Model., Gregory D. Smith, S Murray Sherman

Applied Science Faculty and Graduate Publications

Although inhibitory inputs are often viewed as equal but opposite to excitatory inputs, excitatory inputs may alter the firing of postsynaptic cells more effectively than inhibitory inputs. This is because spike cancellation produced by an inhibitory input requires coincidence in time, whereas an excitatory input can add spikes with less temporal constraint. To test for such potential differences, especially in the context of the function of thalamocortical (TC) relay nuclei, we used a stochastic “integrate-and-fire-or-burst” TC neuron model to quantify the detectability of excitatory and inhibitory drive in the presence and absence of the low-threshold ...


A Synopsis Of The Ferns And Fern Allies Of Nebraska, With Maps Of Their Distribution, Steven B. Rolfsmeier, Robert B. Kaul, David M. Sutherland Dec 2001

A Synopsis Of The Ferns And Fern Allies Of Nebraska, With Maps Of Their Distribution, Steven B. Rolfsmeier, Robert B. Kaul, David M. Sutherland

Faculty Publications in the Biological Sciences

An annotated list and county-by-county distribution maps are presented for the 32 species of ferns and fern allies native to Nebraska, based upon field and herbarium studies and critical evaluation of the literature. Native to the state are Isoetes melanopoda, Selaginella rupestris, five species of Equisetum, and 25 species in 18 genera of ferns. Three native species are here verified for the first time, based upon recent collections: Matteuccia struthiopteris var. pensylvanica, Ophioglossum engelmannii, and Pellaeaglabella ssp. glabella. Isoetes melanopoda was rediscovered in 2000, the first record since 1941. Rejected are published reports of Lycopodium annotinum, Selaginella densa, Equisetum ...


Micrornas: Tiny Regulators With Great Potential, Victor Ambros Dec 2001

Micrornas: Tiny Regulators With Great Potential, Victor Ambros

Victor R. Ambros

Animal genomes contain an abundance of small genes that produce regulatory RNAs of about 22 nucleotides in length. These microRNAs are diverse in sequence and expression patterns, and are evolutionarily widespread, suggesting that they may participate in a wide range of genetic regulatory pathways.


Certified Crop Adviser Short Courses In 2002, Richard Larson Dec 2001

Certified Crop Adviser Short Courses In 2002, Richard Larson

Integrated Crop Management News

List of crop extension classes offered in 2002.


Attend The Winter Crop Advantage Series, James A. Fawcett Dec 2001

Attend The Winter Crop Advantage Series, James A. Fawcett

Integrated Crop Management News

Crop producers and agribusiness personnel are invited to attend the Iowa State University Extension Crop Advantage Series to be presented at 11 locations around the state in January and February 2002. This series of conferences will emphasize how the 2001 crop problems will influence pest management and other decisions in 2002, as well as the latest integrated crop management technology. All of the events will feature Mike Duffy (Department of Economics, ISU) on "The New Farm Bill and the Changing Structure of Agriculture," and Elwynn Taylor (Department of Agronomy, ISU) on "Managing Weather Risk for Production and Marketing."


Fda Releases Guidelines For Fumonisins In Corn, Gary P. Munkvold Dec 2001

Fda Releases Guidelines For Fumonisins In Corn, Gary P. Munkvold

Integrated Crop Management News

Last month, the U.S. Food and Drug Administration (FDA) released its official guidelines for safe levels of fumonisins in corn used for foods and animal feeds. Fumonisins are mycotoxins produced by species of Fusarium fungi that cause Fusarium ear rot. Fumonisins are the most common mycotoxins found in corn; because they are acutely toxic to animals (especially pigs and horses), and have been linked to increased cancer rates and other human health problems, the FDA feels that "human health risks associated with fumonisins are possible."


Varietal Differences In Frogeye Leaf Spot Susceptibility, Michael D. Uphoff, X. B. Yang Dec 2001

Varietal Differences In Frogeye Leaf Spot Susceptibility, Michael D. Uphoff, X. B. Yang

Integrated Crop Management News

Frogeye leaf spot of soybean, caused by the fungus Cercospora sojina, causes damage in warm, humid soybean-growing regions and has been more important in southern states than in Iowa. Recently, however, the incidence of frogeye leaf spot has increased in north central states, including Iowa, with reports of severe damage in several areas. Symptoms of the disease include small, gray spots with reddish brown borders forming on the upper leaves in mid- to late August.


Changes In Disease Occurrence In Iowa, X. B. Yang Dec 2001

Changes In Disease Occurrence In Iowa, X. B. Yang

Integrated Crop Management News

A warm winter this year has generated discussion on the effects of climate on disease occurrence. At the 1998 Iowa State University ICM Conference, we discussed how diseases favored by cool temperatures may became less important, whereas warm-temperature diseases may increase in future years. At this year's ICM Conference, there were numerous comments and questions about new soybean diseases becoming increasingly important to production. Changes in disease occurrence have provided new challenges in disease management practices.


Extra 2001 Icm Conference Proceedings, Richard W. Larson Dec 2001

Extra 2001 Icm Conference Proceedings, Richard W. Larson

Integrated Crop Management News

The Agribusiness Education Program office has extra copies of the 2001 Integrated Crop Management Conference proceedings available for purchase. If you pick up copies at the office, the cost is $15 each. If copies are shipped to you, they are $17.50 each and this price includes the shipping cost. To place an order, make your check payable to Iowa State University, or provide your credit card number, expiration date, and cardholder name if paying by credit card (Visa/MasterCard/Discover) and mail it to Agribusiness Education Program, 2104 Agronomy Hall, Iowa State University, Ames, Iowa, 50011. If you have ...


Grasshoppers In December, Marlin E. Rice Dec 2001

Grasshoppers In December, Marlin E. Rice

Integrated Crop Management News

With tattered wings and a broken hind leg, this differential grasshopper was still alive on December 8. On this date I found two grasshoppers in my yard north of Ames. They had survived several hard frosts in October and then continued to beat the odds through a relatively mild November. Maybe this should come as no surprise because 2001 was a very unusual insect year in Iowa, with a variety of pest problems rarely experienced.


Sediment And Total Maximum Daily Loads, Mahdi Al-Kaisi, H. Mark Hanna, William Ehm, John Creswell, Michael J. Tidman Dec 2001

Sediment And Total Maximum Daily Loads, Mahdi Al-Kaisi, H. Mark Hanna, William Ehm, John Creswell, Michael J. Tidman

Integrated Crop Management News

An understanding of total maximum daily loads (TMDLs) is important when planning and implementing conservation practices. You need to define and plan for TMDLs as part of your farm's conservation plan. But you also need to consider all the land and farmers in the entire watershed, as well as the impact of management decisions that you and other farmers make on the whole watershed.


Water Quality Conference 2002, Richard W. Larson Dec 2001

Water Quality Conference 2002, Richard W. Larson

Integrated Crop Management News

Plan to attend the 2002 Water Quality Conference "Agriculture and the Environment: The Challenge of Change" on March 4-6. This conference will provide a forum for awareness and discussion of critical issues affecting water resources in Iowa. Topic presentations and panel discussions will address how Iowa agriculture is changing and the impact of change on Iowa's water resources. The conference will be held at the Scheman Building, Iowa State University, Ames, from 9:45 a.m. to 5:00 p.m. on March 4; from 8:30 a.m. to 4:30 p.m. on March 5; and from ...


Molecular Phylogenetic Studies In Rosaceae, Christopher S. Campbell Dec 2001

Molecular Phylogenetic Studies In Rosaceae, Christopher S. Campbell

University of Maine Office of Research Administration: Grant Reports

This project will investigate the evolutionary relationships within the large and important rose family. This group of plants contains numerous commercially valuable fruits (apples, pears, strawberries, cherries, peaches, plums, blackberries, and raspberries) and many horticulturally significant plants (roses, cotoneaster, lady's mantle, bridle-wreath, flowering quince, fire-thorn, cinqfoil, and others). Despite the large and important role that these plants play in our daily lives and scientific interest, we do not have a clear view of the evolutionary relationships of members of the family. A primary reason for this situation is that insufficient evidence has been accumulated to adequately address the problem ...


Manipulation Of Prenatal Hormones And Dietary Phytoestrogens During Adulthood Alter The Sexually Dimorphic Expression Of Visual Spatial Memory, Edwin D. Lephart, Trent D. Lund Dec 2001

Manipulation Of Prenatal Hormones And Dietary Phytoestrogens During Adulthood Alter The Sexually Dimorphic Expression Of Visual Spatial Memory, Edwin D. Lephart, Trent D. Lund

All Faculty Publications

In learning and memory tasks, requiring visual spatial memory (VSM), males exhibit higher performance levels compared to females (a difference attributed to sex steroid hormonal influences). Based upon the results from our companion investigation, this study examined the influence of prenatal sex steroid hormone manipulations on VSM in adulthood, as assessed in the radial arm maze. Additionally, the influence of dietary soy phytoestrogens (i.e., the presence of high or low estrogen-like compounds present in the animal's diet) on VSM was examined in combination with the prenatal hormonal manipulations. Results: Radial arm maze performance on a phytoestrogen-rich diet: 1 ...


Visual Spatial Memory Is Enhanced In Female Rats (But Inhibited In Males) By Dietary Soy Phytoestrogens, Edwin D. Lephart, Trent D. Lund, Timothy W. West, Lilyan Y. Tian, Lihong H. Bu, Daniel L. Simmons, Kenneth Setchell, Herman Adlercreutz Dec 2001

Visual Spatial Memory Is Enhanced In Female Rats (But Inhibited In Males) By Dietary Soy Phytoestrogens, Edwin D. Lephart, Trent D. Lund, Timothy W. West, Lilyan Y. Tian, Lihong H. Bu, Daniel L. Simmons, Kenneth Setchell, Herman Adlercreutz

All Faculty Publications

In learning and memory tasks, requiring visual spatial memory (VSM), males exhibit superior performance to females (a difference attributed to the hormonal influence of estrogen). This study examined the influence of phytoestrogens (estrogen-like plant compounds) on VSM, utilizing radial arm-maze methods to examine varying aspects of memory. Additionally, brain phytoestrogen, calbindin (CALB), and cyclooxygenase-2 (COX-2) levels were determined. Results: Female rats receiving lifelong exposure to a high-phytoestrogen containing diet (Phyto-600) acquired the maze faster than females fed a phytoestrogen-free diet (Phyto-free); in males the opposite diet effect was identified. In a separate experiment, at 80 days-of-age, animals fed the Phyto-600 ...


Northeast Research Station Watertown, South Dakota Annual Progress Report, 2001, Agricultural Experiment Station, Plant Science Department Dec 2001

Northeast Research Station Watertown, South Dakota Annual Progress Report, 2001, Agricultural Experiment Station, Plant Science Department

Agricultural Experiment Station and Research Farm Annual Reports

This is the 2001 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.


West River Ag Center Crops And Soils Research Annual Progress Report, 2001, Agricultural Experiment Station Dec 2001

West River Ag Center Crops And Soils Research Annual Progress Report, 2001, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This is the 2001 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.


Longitudinal Variation In Muscle Protein Expression And Contraction Kinetics Of Largemouth Bass Axial Muscle, Tierney M. Thys, Jason M. Blank, David J. Coughlin, Fred Schachat Dec 2001

Longitudinal Variation In Muscle Protein Expression And Contraction Kinetics Of Largemouth Bass Axial Muscle, Tierney M. Thys, Jason M. Blank, David J. Coughlin, Fred Schachat

Biological Sciences

The present study investigates muscle protein expression in largemouth bass Micropterus salmoides through intra- and intermyomeric comparisons of white muscle. Using denaturing SDS-polyacrylamide gel electrophoresis, muscle protein expression in the arm and cone regions of sequential myomeres was compared for three bass. Low percentage (4.75 %) polyacrylamide-SDS gels and cyanogen bromide (CNBr) peptide mapping revealed no obvious intramyomeric differences between the myosin heavy chains of the arm and cone regions. Electrophoresis of myofibrils and muscle homogenates on higher percentage gels also failed to demonstrate any significant differences between arm and cone regions in either the myosin light chains or any ...


Growth And Metabolism Of Larval Zebrafish: Effects Of Swim Training, Brian P. Bagatto, B. Pelster, W. W. Burggren Dec 2001

Growth And Metabolism Of Larval Zebrafish: Effects Of Swim Training, Brian P. Bagatto, B. Pelster, W. W. Burggren

Brian P. Bagatto

Larval zebrafish (Danio rerio) of three different age classes ('yolk-sac' larvae, 96 h; 'swim-up' larvae, 9 days old; and 'free-swimming' larvae, 21 days old) were trained for 2, 6 and 11 days, respectively, to swim at 0 body lengths per second (BL s(-1)), 2 BL s(-1) and 5 BL s(-1). Survival was significantly diminished in larvae trained at 5 BL s(-1) compared to controls (0 BL s(-1)). Although training produced no significant differences in mass and length, the youngest larvae absorbed their yolk at a faster rate during training. Routine oxygen consumption (M(O2r)) and ...


Fat Supplementation For Beef Cows, Ivan G. Rush Dec 2001

Fat Supplementation For Beef Cows, Ivan G. Rush

Range Beef Cow Symposium

It has long been known that adequate energy is required for high reproduction in beef cows. Historically, most high energy supplements contained starch from grains such as corn, barley, etc., which may cause some negative effects on forage digestion when fed at relatively high levels. This is especially true when the ration is deficient in protein. An alternative to energy supplementation is utilizing plant and animal fat, which are much higher in energy than grains such as corn or barley. Early research has shown that very high levels of fat in the diet (in excess of 6-8% fat in the ...


The Role Of Undegradable Intake Protein In Management Of The Young Beef Female, Trey Patterson Dec 2001

The Role Of Undegradable Intake Protein In Management Of The Young Beef Female, Trey Patterson

Range Beef Cow Symposium

Reproductive failure in young cows is expensive to many beef operations in the Northern Great Plains. Scientists, nutritionists, and producers have typically placed great effort into heifer development and mature cow management at the expense of two- and three-year-old cows. Meek et al. (1999), working with a ranch in the Nebraska Sandhills, found that the net present value (current animal value accounting for time value of money) of beef females peaked at four years old. Why were bred heifers and pregnant two-year-olds not more valuable than four-year-old cows? Reproductive failure in the young cows did not allow them to stay ...


Economics Of Young Female Management, Dillon M. Feuz Dec 2001

Economics Of Young Female Management, Dillon M. Feuz

Range Beef Cow Symposium

What is the value of a heifer calf, a bred heifer, or a re-bred 2nd calf cow? How does that value compare to the current market price? What is your cost of raising a heifer calf, bred heifer, or re-bred 2nd calf cow? How many pencils have been worn dull or how many spreadsheets have been created to answer these questions? The unrealistic objective of this paper is to answer these questions. Perhaps a more realistic objective is to answer some of these questions and to provide you the framework to answer some of the questions for your own operation ...


Leasing Arrangements For Cattle, Richard T. Clark, Duane Griffith, Kevin Dhuyvetter, Damona Doye Dec 2001

Leasing Arrangements For Cattle, Richard T. Clark, Duane Griffith, Kevin Dhuyvetter, Damona Doye

Range Beef Cow Symposium

Agriculturists have long used leasing arrangements as a means of farming or ranching with more than owned resources. Most commonly, land has been leased, but other resources can be acquired in a similar manner. Beef cows are leased between parties on either a cash or share of calf crop basis, but share leases seem to be predominant. Bulls, when not part of a cow share agreement, are primarily leased for cash.

Leasing arrangements may be considered in several situations. Producers can use leases, calf share in particular, to transfer ownership of cows to others over time with possibly less income ...


Traversing The Internet For Useful Information, Julie Walker, Kory Bierle Dec 2001

Traversing The Internet For Useful Information, Julie Walker, Kory Bierle

Range Beef Cow Symposium

In the fast paced livestock industry, producers are looking for information that can give them an edge in a timely manner. Never before has so much information been at our fingertips. The Internet is an excellent tool that can be used for obtaining good research-based information. The type of information available on the Internet is endless. Daily, weekly, and yearly reports such as market reports can be found on free sites as well as private sites. When questions arise the Internet can be a resource finder. In addition, e-mail allows you to communicate with individuals on your time schedule.

Obtaining ...


Purchasing Versus Raising Replacement Females: To Outsource Or Not To Outsource?, Jack C. Whittier Dec 2001

Purchasing Versus Raising Replacement Females: To Outsource Or Not To Outsource?, Jack C. Whittier

Range Beef Cow Symposium

The beef cattle industry is experiencing changes in the way it does business. Some have suggested that there is more change occurring now than in any other period of the industry’s history. Among these changes are indications, driven by real incentives, that more uniformity of production is evolving. Alliances and coordinated supply systems are developing that suggest - even specify - certain genetic and production parameters for those who supply calves into their production programs.

Establishing and maintaining a logical, economical, practical and effective system for replenishing the cowherd is a necessary (some would say a necessary evil) component of producing ...


Managing Young Cows, Dick Pruitt Dec 2001

Managing Young Cows, Dick Pruitt

Range Beef Cow Symposium

In a recent analysis of SPA records from the Northern Great Plains, pregnancy percentage, calving percentage and weaning percentage were important production variables related to profit (Dunn, 2000). The high profit group did not wean heavier calves than the medium profit group. Consistent with other studies, the high profit group had lower investment and total expenditures per cow than the medium or low profit groups. Although describing what makes a cow-calf enterprise profitable is not as simple as we might like, there is strong evidence that relatively high reproductive rate in combination with low cost of production is a very ...