Life Sciences Commons^™

Cropwatch No. 99-5, April 16, 1999, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Updates.................40

Calendar.................40

Alfalfa Weevils.................42

Field Scout Training.................42

Pesticide Safety.................43

Wooly Cupgrass.................44

Strategizing Weed Management.................45

Pollinating Crops.................46

New Plant Guide.................46

Cleavage Of A 23s Rrna Pseudoknot By Phenanthroline-Cu(Ii), G. W. Muth, Charles M. Thompson, Walter E. Hill

Biological Sciences Faculty Publications

Studying the intricate folding of rRNA within the ribosome remains a complex problem. Phenanthroline-Cu(II) complexes cleave phosphodiester bonds in rRNA in specific regions, apparently especially where the rRNA structure is constrained in some fashion. We have introduced phenanthroline-copper complexes into 50S Escherichia coli ribosomal subunits and shown specific cleavages in the regions containing nucleotides 60-66 and 87-100. This specificity of cleavage is reduced when the ribosome is heated to 80 degrees C and reduced to background when the ribosomal proteins are extracted and the cleavage repeated on protein-free 23S rRNA, It has been suggested that nucleotides 60-66 and 87-95 in …

A New Subspecies Of Brephidium Isophthalma (Lycaenidae: Polyommatinae) From Coastal South Carolina, Harry Pavulaan, Ronald R. Gatrelle

The Taxonomic Report of the International Lepidoptera Survey

Brephidium isophthalma pseudofea was described in 1873 from the Florida Keys, United States. The ventral ground color of the wings in topotypical pseudofea is a yellowish brown. The antennal clubs of pseudofea have prominent orange red tips. The ventral surface of the abdomen of pseudofea is broadly white to very light gray and usually extends halfway around the sides of the light to medium brown abdomen. Specimens of B. isophthalma from coastal South Carolina differ greatly from topotypical pseudofea. Accordingly, B. i. insularus is described as a new subspecies from coastal South Carolina. The antennal clubs …

Simulation Of Carbon-Nitrogen Cycling During Spring Upwelling In The Cariaco Basin, John J. Walsh, Dwight A. Dieterle, Frank E. Muller-Karger, Richard Bohrer, W. Paul Bissett, Ramon J. Varela, Ruben Aparicio, Rafael Diaz, Robert Thunell, Gordon T. Taylor, Mary I. Scranton, Kent A. Fanning, Edward T. Peltzer

Marine Science Faculty Publications

Coupled biological-physical models of carbon-nitrogen cycling by phytoplankton, zooplankton, and bacteria assess the impacts of nitrogen fixation and upwelled nitrate during new production within the shelf environs of the Cariaco Basin. During spring upwelling in response to a mean wind forcing of 8 m s(-1), the physical model matches remote-sensing and hydrographic estimates of surface temperature. Within the three-dimensional flow field, the steady solutions of the biological model of a simple food web of diatoms, adult calanoid copepods, and ammonifying/nitrifying bacteria approximate within similar to 9% the mean spring observations of settling fluxes caught by a sediment trap at similar …

Forestland: A Good Investment April 9-10, 1999, Arthur Temple College Of Forestry And Agriculture

eBooks

No abstract provided.

Meeting Minutes, April 10th, 1999, National Smokejumper Association Board Of Directors

National Smokejumper Association Meeting Minutes

Agenda: Approval Of Minutes.; Treasurer's Report.; Financial Health Of The Organization.; Membership And Data Base Report.; Website.; Draft Study, Project 2000.; Travel Allowance.; Base Liaison Directors.; Role In The Future Of Smokejumping.; Mission Statement.; Role In Mann Gulch Commemorative Activities.; Records Management.; Historical Preservation Committee.; Executive Committee Meetings Quarterly.; Elections.; Membership Committee.; Scholarship Fund For Children Of Jumpers Through The Nsa.; Logo.; Social Activities.; Director At Large.; Collect E-mail Addresses For Directors/Members.; Monitor Budget And Dues Structure.; Complete Nsa Brochure.; Survey Membership To Determine Talents Available For N Sa Work.; Review, Amend, And Adopt Position Descriptions.; Solicit Corporate Memberships. Upgrade …

Cropwatch No. 99-4, April 9, 1999, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Field updates ………………32

Adjust planter ………………33

Alfalfa weevil treatment ………………35

Herbicide rotation restrictions ………………35

Table of herbicides……………… 35

Spring freeze likely ………………38

Soil temperatures ………………38

Tb Or Not Tb: Disease And The Adaptiveness Of Political Borders, Ibpp Editor

International Bulletin of Political Psychology

This article describes adaptive and nonadaptive aspects of political borders at the threshold of the 21st century.

Cell Cycle-Dependent Sequencing Of Cell Fate Decisions In Caenorhabditis Elegans Vulva Precursor Cells, Victor Ambros

Dartmouth Scholarship

In Caenorhabditis elegans, the fates of the six multipotent vulva precursor cells (VPCs) are specified by extracellular signals. One VPC expresses the primary (1°) fate in response to a Ras-mediated inductive signal from the gonad. The two VPCs flanking the 1° cell each express secondary (2°) fates in response to lin-12-mediated lateral signaling. The remaining three VPCs each adopt the non- vulval tertiary (3°) fate. Here I describe experiments examining how the selection of these vulval fates is affected by cell cycle arrest and cell cycle-restricted lin-12 activity. The results suggest that lin-12 participates in two

INTRODUCTION

Cell-cell signaling is …

Action Of Retinoids On Embryonic And Early Postnatal Testis Development, Andrea S. Cupp, Jannette M. Dufour, Grace Kim, Michael K. Skinner, Kwan Hee Kim

Department of Animal Science: Faculty Publications

The current study investigates the hypothesis that retinoids have a role in embryonic testis development. The action of retinoids on testis development and the expression of retinoic acid receptors (RARα, RARβ, RARγ) were examined. In embryonic day 13 (E13; plug date 5 E0) testis organ cultures an RAR-selective agonist and alltrans retinoic acid completely inhibited seminiferous cord formation. In contrast, an RARα-selective antagonist had no effect. RT-PCR demonstrated that RARα messenger RNA (mRNA) was expressed at all developmental time points evaluated, which included embryonic day 14 (E14) through postnatal day 30 (P30). Expression of RARβ mRNA was present at E15 …

Chronic Effects Of Atrazine On Tolerance Of A Benthic Diatom, Karen J. Nelson, Kyle D. Hoagland, Blair Siegfried

Department of Entomology: Faculty Publications

The effects of prior chronic exposure to atrazine on responses to subsequent acute exposures were investigated using a common benthic diatom. Clonal, axenic cultures of Craticula cuspidata were established from the Platte River (Nebraska) and obtained from a culture collection (unlikely prior exposure to atrazine). All cultures received a chronic 67-d treatment of 1 μg/L atrazine, and growth was monitored using fluorometric detection of chlorophyll a. Chronic atrazine exposure significantly reduced growth rate only during the first day of treatment (p= 0.0001); no significant effect was detected throughout the remainder of the 67-d period. Following the chronic treatment, …

Cropwatch No. 99-3, April 2, 1999, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Field updates/calendar ……………22

Balancing alfalfa soils ……………23

Corn herbicide efficacy tables ……………24

Below normal rainfall ……………27

New herbicides…………… 28

Adult corn rootworm resistance ……………29

Legume Logic Number 104

Legume Logic

Contents

Global factors influence 199 protein prices

Lupin teaser

Dry seeding lupins

Teaser answers

Anthracnose Update

Pulse points

Weed watch

Growers' response

Legume Logic Number 103

Legume Logic

Contents

Orobanche - the destructive paprasie

Total CB pulse receivals for th 1998/99 season

Pulse points

March checklist

The population bomb- threat or opportunity? - Graeme Martin, Associate Professor of Animal Science, University of Western Australia.

- The threat

- The opportunity

Triazines

Stress And Burnout In Female High School Athletic Directors, Jeffrey J. Martin, Betty Kelley, Candice Dias

Kinesiology, Health and Sport Studies

In the current study we examined the relationships between stress predictors, stress, and burnout in female high school athletic directors (N = 52). Significant negative correlations between stress and hardiness and between stress and number of social support providers were found. Significant positive correlations between stress and time concerns, personnel concerns, and program success (e.g., winning) subscales of the athletic directing issues scale were also found. Subjects high in hardiness and with adequate social support networks, who also reported few athletic directing issues, were likely to report minimal stress. Significant positive correlations also indicated that stress was related to …

Influence Of Crop Rotation, Tillage, And Management Inputs On Weed Seed Production, George O. Kegode, Frank Forcella, Sharon Clay

Agronomy, Horticulture and Plant Science Faculty Publications

Approaches to crop production that successfully reduce weed seed production can benefit farming systems by reducing management inputs and costs. A 5-yr rotation study was conducted in order to determine the effects that interactions between crop rotation, tillage, and amount of herbicide and fertilizer (management inputs) have on annual grass and broad-leaved weed seed production and fecundity. There were 10 crop rotation and tillage system combinations and three levels of management inputs (high, medium, and low). Green and yellow foxtail were the major weed species, and together they yielded between 76 and 93% of collected weed seeds. From 1990 to …

Ua11/1 On Campus, Vol. 9, No. 3, Wku University Relations

WKU Administration Documents

On Campus newsletter featuring articles about faculty, staff and events at Western Kentucky University. Regular features are:

• College News
• Sponsored Programs
• Hot off the Press
• Personnel File
• Coming Up - Calendar of Events

This issue includes articles:

• Kindred, Teresa. WKU Produces Agri-Leaders - WKU Agriculture
• Demonstrating Her Commitment to Her Alma Mater -Mary Nixon
• Gift Forms Partnership with WKU - Firstar Corporation
• April 16, 1998: When All Hail Broke Loose
• Your Oral Health and Over All Health - WKU Dental Hygiene
• Miller, Mary. A Message from Your Faculty Regent
• Honored for Lifetime Achievement - Tom Baldwin
• College Heights Herald Wins …

Observations And Possible Function Of The Striking Anterior Coloration Pattern Of Galathea Intermedia (Crustacea: Decapoda: Anomura), J. M. Hall-Spencer, P. G. Moore, L. U. Sneddon

Veterinary Science and Medicine Collection

Galathea intermedia is common, but cryptic, on Clyde maerl deposits where it lives in small groups of mixed sex and age, sharing shelters (typically dead Dosinia shells) to avoid predation. Its appearance is marked by six iridescent blue spots which may play an important role in intra- or interspecific interactions.

Development And Reproduction Of A Population Of Eretmocerus Eremicus (Hymenoptera: Aphelinidae) On Bemisia Argentifolii (Homoptera: Aleyrodidae), David H. Headrick, Thomas S. Bellows, Jr., Thomas M. Perring

Horticulture and Crop Science

Although the aphelinid parasitoid Eretmocerus eremicus Rose & Zolnerowich is the most abundant naturally occurring parasitoid of Bemisia argentifolii Bellows & Perring in the U.S. desert southwest, its effectiveness in different cropping systems varies. Development and reproduction of a population of this parasitoid attacking B. argentifolii infesting cotton, Gossypium hirsutum L., and sweet potato, Ipomoea batatas L., were quantified and compared. Females potato; there were no significant differences of these parameters between host plant species. A preoviposition period of 0.61 d was recorded, and a maximum number of eggs laid in a day was 69 on cotton and 13 on …

Toward An Evolutionary Understanding Of Song Diversity In Oscines, Erick Greene

Biological Sciences Faculty Publications

No abstract provided.

Does A Genetically Modified Rose Still Smell As Sweet: Labeling Of Genetically Modified Organisms Under The Biosafety Protocol, Lisa A. Tracy

Buffalo Environmental Law Journal

No abstract provided.

Nebline, April 1999

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Earth Wellness Festival fifth year celebration
Annuals or perennials? Many factors to consider
Color your landscape with 1999 rose winners
Basil in the garden
Ground covers-The landscapes quilt
Springtime animal FAQs
Upcoming household hazardous waste collections
Be on the lookout for flying termites!
Where do you go for wildlife removal?
See no weevil? Scout your alfalfa to make sure!
Fertilizing with Phosphorus
Reader response - I would like an article about starting a commercial rabbit business
Lagoons for the home
Tractor safety tips (part 4)
Fertilizing trees and shrubs
New plants to consider
Strength training—a fountain of youth?
Healthy Eating: …

Center For Grassland Studies Newsletter, Spring 1999, Volume 5, No. 2

Center for Grassland Studies: Newsletters

Contents:

Spring Creek Prairie Near Lincoln Provides Outdoor Classroom Other Preserved Virgin Prairies in Southeast Nebraska

Algae Control in Ponds With Barley Bales: On-site Results in Nebraska by Roch Gaussoin, Department of Horticulture, UNL

CGS Offers New Grazing Livestock Systems Major

Grassland Ecology Theme of Fall 1999 CGS Seminar Series

Fair 2000 Symposium Sets Food Animal Research Priorities

Executive Order on Invasive Species

Ard News April 1999

Agricultural Research Division: News and Annual Reports

CONTENTS:

Comments from the Dean
NABC 11 Meeting
GPRA and POW - What Are They and Why Should I Care?
Federal Funding fur Agricultural Research
American Agriculture: A Food, Fiber and Environmental System
Layman Awards
FY 2000 CSREES Budget Recommendations
New or Revised Projects
Grants and Contracts Received February and March, 1999
Proposals Submitted for Federal Grants
Policy Prohibits Use of University Funds for Memberships, Subscriptions
Technology Transfer in Universities

Spring 1999, Nsu Oceanographic Center

Currents

No abstract provided.

Dimethyldioxirane In Tcf Bleaching Sequences, Nayereh Mahdavi

Masters Theses

The use of chlorine containing bleaching process creates various organic compounds such as chlorinated furan, dioxin, and AOX (adsorbable organic halogen). The human and aquatic life has been affected with the formation of these chlorinated organic compounds. EPA is proposing new regulations to impose discharge limits on the conventional pollutant materials of the bleaching effluents.

The objective of this research was to evaluate two TCF (Total Chlorine Free) bleaching sequences that use hydrogen peroxide and DMD on oxygen delignified hardwood kraft pulp. In one of the sequences, the DMD stage (A) was used prior to the hydrogen peroxide stage (P), …

Microbiology Of The Oil Fly, Helaeomyia Petrolei, Dana R. Kadavy, Bradley A. Plantz, Christopher A. Shaw, Jill Myatt, Tyler A. Kokjohn, Kenneth Nickerson

Papers in Microbiology

Helaeomyia petrolei larvae isolated from the asphalt seeps of Rancho La Brea in Los Angeles, Calif., were examined for microbial gut contents. Standard counts on Luria-Bertani, MacConkey, and blood agar plates indicated ca. 2 x 10⁵ heterotrophic bacteria per larva. The culturable bacteria represented 15 to 20% of the total population as determined by acridine orange staining. The gut itself contained large amounts of the oil, had no observable ceca, and maintained a slightly acidic pH of 6.3 to 6.5. Despite the ingestion of large amounts of potentially toxic asphalt by the larvae, their guts sustained the growth of …

Forage News [1999-04], Department Of Plant And Soil Sciences, University Of Kentucky

Forage News

• Kentucky Alfalfa Conference to Celebrate 20^TH Anniversary
• Correct Web Address for Variety Testing Publications
• Spring Into Kentucky Grazing Schools
• Kentucky Forage & Grassland Council President’s – Corner
• Lime Coating Affects
• How Many Alfalfa Plants Are Needed?
• Pasture Aeration Tools
• Fence and Water Systems for Management-Intensive Grazing
• Upcoming Events

Particle Trajectories In An Indian Ocean Model And Sensitivity To Seasonal Forcing, Meredith A. Haines, Rana A. Fine, Mark E. Luther, Zaihua Ji

Marine Science Faculty Publications

Trajectory experiments in a thermocline layer of an Indian Ocean model are used to investigate the role of different meridional transport mechanisms and quantify spreading pathways and rates under different forcing. Particles are introduced along two boundaries: the south Indian Ocean at 30 degrees S and the Indonesian Throughflow. Particles are advected horizontally within the layer by archived model velocity fields (1/3 degrees X 1/3 degrees resolution) for a period of 50 years. The velocity fields are the result of forcing the model by monthly mean climatology (case A). The distribution of particles within the Tropics suggests efficient ater mass …

Implications Of Cloning For Breed Improvement Strategies: Are Traditional Methods Of Animal Improvement Obsolete?, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Can the optimum animal be defined? Will that definition change over time, by location, by market demand? First, assume what may be impossible, that the perfect animal can be defined or that only a limited number of definitions of “perfect” are needed. Then, can the “perfect” animal to match a definition be found? Suppose such an animal is found. Then the question to be answered before trying to clone as a method of genetic improvement becomes “Is the animal perfect because of phenotype or genotype?” In other words, the P = G + E problem exists, which requires traditional methods …