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Differential Resource Consumption Obviates A Potential Flight–Fecundity Trade-Off In The Sand Cricket (Gryllus Firmus), S. Mole, Anthony J. Zera

Anthony Zera Publications

1. The physiological basis of life-history trade-offs is poorly understood. A useful system in which the underlying physiological mechanisms can be studied is wing polymorphism in insects.
2. The sand cricket, Gryllus firmus (Orthoptera, Gryllidae), exists in natural populations as either a fully-winged (LW), flight-capable morph or as a short-winged (SW) morph that cannot fly.
3. We characterized the morphs with respect to physiological features that influence a potential trade-off between flight capability and fecundity. We measured nutritional indices, flight muscle development and ovarian development in the LW and SW morphs.
4. In adults, ovarian growth occurred after the completion …

High Shear Mixing Reactor For Glycerolysis, Hossein Noureddini

Papers in Biomaterials

lnrcreased ervironmental awareness and depletion of resources are driving industry to develop aiternative fuels from renewable resources that are environmentally more acceptable. Esters of fatty acids (biodiesel), derived from the transesterification of vegetable oils, have properties similar to cornponents of petroleum based diesel fuel. Cost has been a major factor in slowing down the commercialization of biodiesel. In order to improve the economy of this process two factors were investigated in this study: 1) use of beef tallow as raw material and 2) by-product utilization.

Glycerol is the by-product of the esterification process. In this work the feasibility of the …

Paraophioidina Scolecoides N. Sp., A New Aseptate Gregarine From Cultured Pacific White Shrimp Penaeus Vannamei, Timothy C. Jones, Robin M. Overstreet, Jeffrey M. Lotz, Paul F. Frelier

Harold W. Manter Laboratory of Parasitology: Faculty Publications

The aseptate gregarine Paraophloidina scolecoides n. sp. (Eugregarinorida: Lecudinidae) heavily infected the midgut of cultured larval and postlarval specimens of Penaeus vannamei from a commercial 'seed-production' facility in Texas, USA. It is morphologically similar to P. korotneffi and P. vibiliae, but it can be distinguished from them and from other members of the genus by having gamonts associated exclusively by lateral syzygy. Shrimp acquired the infection at the facility; nauplii did not show any evidence of infection, but protozoea, mysis, and postlarval shrimp had a prevalence and intensity of infection ranging from 56 to 80 % and 10 to …

Water Current, Volume 26, No. 3, June 1994

Water Current Newsletter

Tour to Take Look at Flood Recovery
From the Director
Kamble Recognized
Glossary of Water-Related Terms
Six Scientists Receive USGS Grant
Trust Needs Advisors
Research Brief: Investigation and Evaluation of Agrichemical Transport near Waverly, Nebraska
For SAGE Members, Learning Never Stops
Water Circular Available
Restoration Project Promising
Legislature Enacts Water Quality Laws
21,000 Contains Recylced
Call for Papers
Creation of NRDs Highlight of Fairchild's Nebraska Term

Ard News June 1994

Agricultural Research Division: News and Annual Reports

CONTENTS:
COMMENTS FROM THE DEAN
UNL RANKING FOR TOTAL RESEARCH AND DEVELOPMENT EXPENDITURES
NATIONAL RESEARCH AND DEVELOPMENT EXPENDITURES IN 1993
ANNUAL RESEARCH PROJECT REPORT FORM AD-421
ARDC RESEARCH AND EDUCATION BUILDING INITIATION OF CONSTRUCTION CELEBRATION
SPECIAL RESEARCH GRANT PROGRAM AWARDS
FEDERAL RESEARCH AND DEVELOPMENT OBLIGATIONS BY AGENCY
FEDERAL EXPENDITURES FOR RESEARCH AND DEVELOPMENT - FY 1994
PROPOSALS SUBMITTED FOR FEDERAL GRANTS
TRENDS IN PH.D.S AWARDED IN AGRICULTURAL SCIENCES
GRANTS AND CONTRACTS RECEIVED APRIL AND MAY, 1994
NEW OR REVISED PROJECTS
ARD ADVISORY COUNCIL ELECTION RESULTS
SMALL BUSINESS AND INNOVATIVE RESEARCH PROGRAM

The Probe, Issue 144 - June 1994

The Probe: Newsletter of the National Animal Damage Control Association

CONTENTS:
Does the Wildlife Damage Management Profession Need A Code of Ethics?
CALENDAR OF UPCOMING EVENTS
NADCA Committees Need You

Prairie Conservation In North America, Fred Sampson, Fritz Knopf

Other Publications in Wildlife Management

The health and future of the earth's ecological systems (Dailey and Ehrlich 1992), their link to the well being of communities and nations (Raven 19901, and the ever-increasing rate of loss of species, communities, and ecological systems (Myers 1993) are among issues drawing biological diversity into the mainstream of conservation worldwide. Yet. in North America, there is no single, established priority in the conservation of biological diversity. In recent years, a great deal of attention has been paid to the problem of tropical and temperate deforestation in part because of profound consequences to the conservation of biological diversity (Harris 1984, …

Effecting Change By The Use Of Consultative Coaching With The Primary Caregivers Of Language Delayed Preschoolers, Sari Jeanne Giles

Open Access Master's Theses (through 2010)

This study examined the effect of a speech-language pathologist using consultative coaching with the primary caregivers (PCG) of two expressive language delayed preschool children. The coaching was designed to improve the PCG’s use of specific communication behaviors and strategies to facilitate growth in the child’s communicative behaviors. Specifically, the consultative coaching encouraged the PCG to (1) follow the child’s lead (2) use self and parallel talk (3) expand on the child’s verbal productions and (4) use open-ended questions. Two dyads, made up of expressive language delayed preschool children and their primary caregivers, were the subjects in single subject multiple-baseline designs. …

Maximum Surface Storage Provided By Crop Residue, John E. Gilley, Eugene R. Kottwitz

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Small ponds created by crop residue serve to store water on upland areas. The present study is conducted to identify the maximum surface storage provided by crop residue. Equations for estimating surface storage are derived assuming that residue elements were oriented end to end, at uniform intervals, in a direction perpendicular to flow. Separate equations are developed for conditions where average slope was greater than or equal to residue cover, or less than residue cover. Both equations relate average surface-storage depth to residue cover, residue diameter, and average slope. Data to test the reliability of the equations are obtained in …

Hydraulic Conditions Required To Move Unanchored Residue Materials, John E. Gilley, E. R. Kottwitz, G. A. Wieman

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Hydraulic conditions required to initiate movement of unanchored residue materials are identified in the present study. Selected amounts of corn, cotton, pine needles, sorghum, soybean, sunflower, and wheat residue are placed in a flume on a sand surface, and flow is then introduced at the top of the flume in progressive increments. The discharge rate and flow velocity necessary to cause residue movement are determined. The ratio of critical flow depth to residue diameter, critical Reynolds number, critical shear stress, dimensionless shear stress, and boundary Reynolds number are calculated from hydraulic measurements. Regression equations are developed to relate dimensionless shear …

Food Restriction Effects On The Body Composition Of Free-Living Ground Squirrels, Spermophilus Belding, Gwendolyn C. Bachman

School of Biological Sciences: Faculty Publications

I conducted afield experiment to examine the use of body fat as an energy re- serve by juvenile female Belding's ground squirrels, Spermophilus beldingi, prior to hibernation. Squirrels were divided into two groups: the squirrels in one group had their foraging times restricted by being placed in a cage forpart of each day for four consecutive days (deprived group), and the squirrels in the other group foraged ad lib. (ad lib. group). The deprived group foraged in its normal habitat morning and evening but had access only to water and lettuce while captive. Total body electrical conductivity (TOBEC), an …

On The Linear Extrapolation To Low Doses, Robert Katz, Michael P. R. Waligórski

Robert Katz Publications

While radiobiological data are conveniently fitted by a linear quadratic formula to data of limited dynamic range at doses typically exceeding 1 Gy, they are extrapolated linearly to doses below a milligray for the evaluation of low dose RBEs. However a single relativistic electron passing through a cell nucleus deposits a “dose” there in the neighborhood of a milligray. The validity of the linear extrapolation then rests on the demonstration that a single electron transit through a cell nucleus can cause inactivation or mutation or can lead to cancer induction. The extrapolation made is a huge one, of some three …

The Prairie Naturalist Volume 26, No. 2. June 1994

The Prairie Naturalist

EARLY HISTORY OF THE NORTH DAKOTA NATURAL SCIENCE SOCIETY ▪ J. T. Lokemoen

TEMPORAL VARIATION IN COYOTE PREY IN TALLGRASS PRAIRIE OF EASTERN KANSAS ▪ D. E. Brillhart and D. W. Kaufman

DIFFERENCES IN USE OF INTERSPERSED WOODLAND AND GRASSLAND BY SMALL MAMMALS IN NORTHEASTERN KANSAS ▪ B. R. McMillan and D. W. Kaufman

THE CIRCANNUAL MASS CYCLE IN THREE POPULATIONS OF THIRTEEN-LINED GROUND SQUIRREL ▪ G. Y. Walker, O. A. Schwartz, and J. E. Joy

SUMMER ELK TRAPPING IN SOUTH DAKOTA ▪ J. J. Millspaugh, G. C. Brundige, and J. J. Jenks

OUT-OF-SEASON BIRTHS OF ELK CALVES IN WYOMING …

Coordination Of Selenium To Molybdenum In Formate Dehydrogenase H From Escherichia Coli, Vadim Gladyshev, Sergei V. Khangulov, Milton J. Axley, Thressa A. Stadtman

Vadim Gladyshev Publications

Formate dehydrogenase H from Escherichia col contains multiple redox centers, which include a molybdopterin cofactor, an iron-sulfur center, and a selenocysteine residue (SeCys-140 in the polypeptide chain) that is essential for catalytic activity. Here we show that addition of formate to the native enzyme induces a signal typical of Mo(V) species. This signal is detected by electron pm etc resonance (EPR) spectroscopy. Substitution of 77Se for natural isotope abundance Se leads to transformation of this signal, indicating a direct coordination of Se with Mo. Mutant enzyme with cysteine substituted at position 140 for the selenocysteine residue has decreased catalytic activity …

Cropwatch No. 94-7, May 6, 1994, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Monitor grain storage .................. 46

Tilt approved for corn................. 46

Scout for seedling pests ............... 47

Combing nitrogen, herbicides ...... 48

Testing compatibility .................. 48

Seed treatments for soybeans ....... 49

Correction: soybean seed treatment ............ 49

Delayed herbicides ......... ............. 50

Extension EPU areas ................... 51

Forces of nature.......................... 52

Growing degree days ................... 52

Soil temperatures ........................ 52

Museum Committee Meeting May 1994, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Revised by-laws Museum Studies master student Evaluation of Building Integrity

Reason, Reasons, And Reasoning: A Constructivist Account Of Human Rationality, David Moshman

Department of Educational Psychology: Faculty Publications

The concept of rationality has its roots in a historic philosophical conception of human beings as creatures of reason. To act on the basis of reason is to act on the basis of reasons, which in turn implies a process of reasoning. An objectivist conception of rationality sees its essence as lying in the use of reasoning processes that conform to appropriate logical norms. A subjectivist conception of rationality sees its essence in the subjective appeal to reasons. It is argued that neither approach alone is adequate. Rationality is best viewed as metasubjective objectivity. That is, the standards that embody …

Wpa News 44 (1994), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (May 1994), number 44

Published by the World Pheasant Association

Center For Sustainable Agricultural Systems Newsletter, May/June 1994

Center for Sustainable Agricultural Systems: Newsletter (1993–2000)

Contents:

Kellogg Grant to Promote Integrated Farming Systems in Nebraska

New USDA Environmental Quality Control

Aquaculture Network on Internet

New Trend: Boutique Microfarms?

Database of State Alternative Ag Laws

Organic Farmers List Top Research Priorities

Cosponsorship Funds Available

Wes Jackson and Paul Ehrlich Highlight Great Plains Grasslands Symposium

Seeking Site on Sustainable Farm for Wheat Research

Madden Speaks on Sustainable Agriculture

Law Professor Comments on Industrialization of U.S. Agriculture

Congressional Sustainable Ag Working Group

More Info on Gopher

National Forest Stewardship Conference

U.S. Agrochemical Companies Lead 1993 Sales Growth

Achievement Differences On Multiple-Choice And Essay Tests In Economics, William Walstad, William E. Becker

College of Business: Faculty Publications

Multiple-choice and essay tests are the typical test formats used to measure student understanding of economics in college courses. Each type has its features. A multiple- choice (or fixed-response) format allows for a wider sampling of the content because more questions can be given in a testing period. Multiple-choice tests also offer greater efficiency and reliability in scoring than an essay. The major disadvantage of a multiple-choice item is that the fixed responses tend to emphasize recall and encourage guessing. In an essay (or constructed- response) test, students generate responses that have the potential to show originality and a greater …

Hexapod Herald - Vol. 6, No. 3, April 25, 1994

Hexapod Herald and Other Entomology Department Newsletters

Grants

Congratulations

Department travelers

USDA-ARS/UNL IPM workshop

Department seminar schedule

1993 publications

Student news

New faces

Congratulations

Proposal For Center For Grassland Studies, Ron Case, Dick Clark, Charles A. Francis, Tony Joern, Terry J. Klopfenstein, Lowell E. Moser, Bob Shearman, Ken Vogel, Steven S. Waller

Center for Grassland Studies: Newsletters

Its my pleasure, on behalf of the Grassland Studies Task Force, to forward a proposal for a Center for Grassland Studies for your consideration. The Task Force is extremely pleased with the overwhelming support from a broad base of input. The Task Force has made a major effort through internal and external listening sessions to insure that there was support and in doing so develop a coalition of partners across the University of Nebraska System, state colleges, community colleges, industry, state and federal agencies, public groups, private non-profit organizations and other educational institutions in the region.

Nebraska has a rich …

Cropwatch No. 94-4, April 15, 1994, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Further tests needed before chloride recommended for wheat............1

Soybean seed treatment recommended............1

Field record book helps producers meet federal criteria............2

Effects of tillage on pests subtle............3

Use bait stations for wireworms............6

Growing degree days predict winter wheat growth............7

Weed control essential to successful no-till............8

Treatment options for triazine-resistant kochia............9

EPUs provide for extension specialist............10

Ovarian Follicular Development In Prepubertal Heifers Is Influenced By Level Of Dietary Energy Intake, E. G. M. Bergfeld, F. N. Kojima, Andrea S. Cupp, M. E. Wehrman, K. E. Peters, M. Garcia-Winder, J. E. Kinder

Department of Animal Science: Faculty Publications

Objectives were twofold: 1 ) to determine the chronology of development of dominant ovarian follicles during the peripubertal period in heifers and 2) to determine whether feeding a diet with low energy content that delays onset of puberty alters chronology of dominant ovarian follicular development in peripubertal heifers. Ten heifers of composite breeding ( 1/4 Angus, 1/4 Hereford, 1/4 Red Poll, 1/4 Pinzgauer) were randomly assigned, at 8 mo of age, to receive a diet designed to produce 0.9 (n = 5) or 0.3 (n = 5) kg body weight gain per day for the duration of the experiment. To …

Aspect Angle Estimation Of Targets In Forward Looking Infrared Images Using The Model-Based Vision Approach, Prabir Bhattacharya

School of Computing: Faculty Publications

We develop a model-based vision algorithm to estimate the aspect angle of a target in a forward-looking infrared (FLIR) image. In the preprocessing stage of the algorithm, a set of 3-D voxel-based models is created using a CAD/CAM package. These models are rotated about the vertical axis through a series of predetermined angles and then projected onto the horizontal plane. This gives us a database library of 2-D images. We select as signature from a given FLIR image and attempt to match it with the various images in the given database library of images using the normalized cross-correlation method. The …

Differential Regulation Of Gonadotropin Synthesis And Release In Ovariectomized Ewes After Treatment With A Luteinizing Hormone-Releasing Hormone Antagonist, T. Sanchez, M. E. Wehrman, G. E. Moss, F. N. Kojima, Andrea S. Cupp, E. G. M. Bergfeld, K. E. Peters, V. Mariscal, H. E. Grotjan Jr., J. E. Kinder, D. L. Hamernik

Department of Animal Science: Faculty Publications

Our working hypothesis was that synthesis and release of LH, but not FSH, were solely dependent on LHRH. Twenty ovariectomized (OVX) ewes were randomly assigned to one of five treatments (n = 4 per group). Ewes were administered a low (10 μg/kg) or high (100 μg/kg) dose of LHRH antagonist (LHRH-Ant) at 24-h intervals for 3 or 6 days. Control ewes received vehicle (5% mannitol) at 24-h intervals for 6 days. Blood samples were collected every 15 min for 4 h before LHRH-Ant or vehicle and every 2 h during the period of treatment to determine concentrations of LH and …

The Probe, Issue # 142 -- April 1994

The Probe: Newsletter of the National Animal Damage Control Association

How Many People Are Involved in Wildlife Management? by Robert H. Schmidt, Editor, The PROBE

Berryman Institute Offers Graduate Fellowship
Eagle Attacks Bear in British Columbia
California Mountain Lion Permits Increase
Find Out About Furbearers Unlimited
Arlette Gilson Presented NADCA Outstanding Student Award
Berryman Institute Announces Awards
Book Review: Ecology and Management of the Eastern Coyote. 1992. A.H. Boer, Ed. Symposium held in Fredericton, New Brunswick, 7-9 November 1991. Wildlife Research Unit, University of New Brunswick, Canada.

Ard News April 1994

Agricultural Research Division: News and Annual Reports

Contents:

Comments from the Dean
107th Annual Report for ARD
ARDC “Research and Education Building” Groundbreaking Ceremony
Special Research Grant Program Awards
Successful Grant Proposals in Sustainable Agriculture
North Central Region Sustainable Agriculture Program Moves
Grants and Contracts Received February and March, 1994
U.S. Public Agricultural Research Expenditures
FY 1995 CSRS Budget
Integrated Crop/Livestock Farm Continues to Develop at ARDC
Proposals Submitted for Federal Grants

Cropwatch No. 94-3, April 1, 1994, Lisa Brown Jasa

Crop Watch (1994–2005)

Inside

Alfalfa into alfalfa ……………. 16

Kansas wheat disease report ……………. 17

Manure/ rom effects ……………. 18

Broadleaf weeds in wheat ……………. 19

IPM scout training dates ……………. 20

Kansas greenbug report ……………. 20

Kansas: alfalfa weevils ……………. 21

Pale western cutworm threat ……………. 21

Crop rotation ……………. 22

Luteinizing Hormone Has A Role In Development Of Fully Functional Corpora Lutea (Cl) But Is Not Required To Maintain Cl Function In Heifers, K. E. Peters, E. G.M. Bergfeld, Andrea S. Cupp, F. N. Kojima, V. Mariscal, T. Sanchez, M. E. Wehrman, H. E. Grotjan, D. L. Hamernik, Roger J. Kittok, J. E. Kinder

Department of Animal Science: Faculty Publications

We tested the hypothesis that endogenous pulses of LH have a role in development and maintenance of CL during the estrous cycle of the bovine female. Twenty heifers were synchronized to estrus by treating two times with prostaglandin F_2α 11 days apart (Day 0 = behavioral estrus). Heifers were then randomly assigned to one of four treatments (n = 5/group). Heifers were treated with an antagonist to LHRH (LHRH-Ant; N-Ac-D-Nal[2]¹,4C1-D-Phe² ,D-Pa[3] ³,D-Cit ⁶,D-Ala¹⁰-LHRH; 10 μg/kg body weight) or vehicle (5% mannitol) once every 24 h: 1) LHRH-Ant Days 2-7, 2) LHRH-Ant Days …