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Winter 1993, Nsu Oceanographic Center

Currents

No abstract provided.

The Sower, Winter 1993

The Sower (CASNR Alumni Newsletter)

Contents:

Today's vision - tomorrow's reality
Alum awards to three
The Prez Sez
In memoriam
Alumni Notes
New college majors provide opportunities

1993 Issues Review

Southeast Research and Extension Center: Reports and Administration

This self-study document was prepared by the faculty and staff of the South Central Research and Extension Center in preparation for the unit review.

The format for this review differs from past reviews in two primary areas. First, the review focuses on issues; thus the emphasis is on looking forward rather than evaluating the past. Second, the review team is largely composed of IANR staff who are familiar with the organization and programming processes. Because of these differences, this document emphasizes the issues and the processes which occurred to arrive at this point. The limited background data is included to …

Effects Of Perinatal Cocaine Exposure On Sexual Differentiation In The Rat Brain, Heather L. Maecker

Master's Theses

No abstract provided.

The Antidiabetic Agent Pioglitazone Enhances Adipocyte Differentiation Of 3t3-F442a Cells: Regulation Of Glucose Transport Activity And Differentiation-Dependent Gene Expression, Tagrid Sandouk

Dissertations

No abstract provided.

The Effects Of Crayfish Grazing On Benthic Algal Community Dynamics In Southwestern Lake Michigan, Kristi A. Zenchak

Master's Theses

No abstract provided.

1993 Beef Cattle Report

Nebraska Beef Cattle Reports

Cow-Calf • Forage Systems Using Sandhills Subirrigated Meadows and Range: Beef Production Traits • Forage Systems Using Sandhills Subirrigated Meadows and Range: Economic Analysis • High Quality Meadow Hay as a Winter Supplement for Gestating Beef Cows in the Sandhills of Nebraska • Heifers Sired by Bulls with Either High or Low EPD's for Marbling Do Not Differ in Age at Puberty • Synovex C Affects Growth, Reproduction, and Calving in Heifers • Synthetic Progestins Influence Secretion of Luteinizing and Timing of Ovulation • Level of Progesterone Influences Pregnancy Rate in Beef Cows and Heifers • Combination of Factors (Ratios) …

Bulletin 4256 - Pecan Nut Cultivation, Aldo Labrosciano

Bulletins 4000 -

Pecans Carya illinoensis, an indigenous species to Northern America, are successfully grown between the latitudes of 25° and 35°. There is considerable variation in size and flavour of the 1000 or more varieties of the nuts.

Large scale production is concentrated in north America, Israel and South Africa. Plantings in Australia are in Victoria and New South Wales, and are developing slowly in Western Australia.

Pecans are well suited to Western Australian conditions where the soil is well drained. Though the trees are deciduous, they have no chill requirement and will flourish if water is not limiting.

Bulletin No 4247 - Introduction To Commercial Mushroom Growing, Margaret Graham

Bulletins 4000 -

No abstract provided.

Seasonal Trends In Forage Quality Of Plants In Subirrigated Meadows Of The Nebraska Sandhills, James T. Nichols, Paul A. Duncan, Don C. Clanton

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Hay from subirrigated meadows is the primary source of forage for wintering beef cattle in the Nebraska Sandhills. Hay quality is an important consideration if the nutritional needs of livestock are to be met. Since the overall quality of the hay is a product of the individual components, quantifying the quality parameters of each species can be helpful in making management decisions in relation to harvesting schedules and manipulation of species composition. In-vitro organic matter digestibility (_IVOMD) and crude protein (_CP) were analyzed for ten of the most important forage species to quantify seasonal trends in …

Effects Of Music And Sensory Deprivation On Ratings Of Perceived Exertion And Exercise Affect, James Chinery

Masters Theses

Music as an ergogenic aid is a novel concept, and one that has been sporadically researched. The purpose of this thesis was to study the effects of music and sensory deprivation on ratings of perceived exertion during exercise.

Eleven active males (i.e. they exercised at least 3 times a week), were tested in three different conditions (music, sensory deprivation, control). They exercised in each condition, at workloads corresponding to 50, 70 and 90% of their maximal oxygen consumption. The sessions and workloads within each session were randomized.

No significant differences were found for heart rate between conditions. Significantly lower perceived …

Thermophilic Starter Cultures: Another Set Of Problems, C. J. Oberg, Jeff Broadbent

Nutrition, Dietetics, and Food Sciences Faculty Publications

Increased consumer demand for yogurt and Italian cheeses, particularly Mozzarella, over the past decade has intensified production demands on thermophilic starter cultures. Dramatically elevated production rates within existing facilities have created problems analogous to those experienced years ago by the dairy industry for mesophilic lactococci when Cheddar cheese production increased dramatically. In contrast to mesophilic lactococci, however, diversity among lactic genera that contain thermophilic species has impeded the progress of microbiological research required to meet these challenges. For example, the bacteriophages that attack these cultures are becoming an important commercial problem, yet little is known about them. Another unique characteristic …

The Function Of Seed Mucilage In Flax (Linum Usitatissimum), Karla Gengler

Honors Theses, 1963-2015

Flax seeds, when imbibed, secrete a halo of mucilage composed of polysaccharides. It has been proposed that this mucilage serves as a reservoir of nutrient for the germinating seed. Seed mucilages in other species have been found to alleviate water stress, inhibit germination in unfavorable conditions, and trap and digest microorganisms. While establishing a protocol for studying flax seed mucilage, I tested the different models and quantified the amount of mucilage per seed. I found that 11-14% of the seed's dry weight is mucilage. Nutrition and digestion of microorganisms do not appear to play roles in the function of flax …

Evidence For Mate Choice By Male Guppies (Poecilia Reticulata), Joseph J. Benz, Daniel W. Leger

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Mate choice by males in organisms that do not make obviously costly contributions to offspring should be expected where sperm production is limited and courtship time is finite. Although male guppies (Poecilia reticulata) contribute only sperm to their offspring, preliminary evidence points to male mate choice in this species. Thus, the hypothesis that male guppies choose their mates was investigated. Mate choice was measured by giving males a choice of different-sized females, using only visual cues. The data revealed that males preferred large females over small females whether they were presented singly, in pairs, or with a small …

Conflicts In Use: The Impacts Of The Oil And Gas Industry On The Herring Fishery In The North Sea, Cornelia Ann Pasche

Marine Affairs Theses and Major Papers

The interaction of the herring (Clupea harengus) with the oil and gas industry in the North Sea is reviewed. The population crash of the herring in the early 1970's and the subsequent closing of that important fishery between 1977 and 1983 has drawn considerable attention to the influences, both biotic and abiotic, affecting the recruitment to the North Sea stock. Current accepted theory points to a change in oceanic current and the subsequent decrease in salinity in the North Sea region, resulting in a change in plankton availability for larval herring as the cause of the recruitment failure during the …

The Effect Of Nutrition On The Morphology Of The Wool Follicle, Gail Moriarty

Theses : Honours

This project was part of a larger CSIRO experiment which was examining the factors involved in the development of tender wool. In order to understand the effect of nutritional variations on wool quality, changes in cellular activity and morphology within the wool follicle were examined. Six sheep with a history of producing low staple strength wool (< 25 N/ktex) and six sheep with a history of producing high staple strength wool (> 30 N/ktex) were selected. The experiment ran for 18 weeks, for the first 10 weeks the sheep were fed a restricted ration to achieve a weight loss of approximately 175g/day. From weeks 11 to 18, the sheep were fed an iso-energetic ration containing …

Metamorphosis Behaviour And Regulation In Tsetse Flies (Glossina Spp.) (Diptera: Glossinidae): A Review, J. Žďárek, D. L. Denlinger

All Peer-Reviewed Publications

This review examines the recent literature on tsetse (Glossina spp.) metamorphosis behaviour and its regulation. The behavioural events associated with metamorphosis are highly specific and most occur only once during the life of the fly. The review begins with the larva's commitment to metamorphosis and then discusses the behaviour associated with parturition, wandering of the third instar larva, pupariation, pupation and adult eclosion. While certain aspects of tsetse metamorphosis behaviour are common to the higher Diptera, the peculiar reproductive strategy of tsetse has dictated many modifications. Most notable of the tsetse peculiarities are the larva's late commitment to metamorphosis, the …

The Influence Of Host Blood On Infection Rates In Glossina Morsitans Sspp. Infected With Trypanosoma Congolense, T. Brucei And T. Simiae, S. Mihok, R. O. Olubayo, N. Darji, E. Zweygarth

All Peer-Reviewed Publications

Trypanosoma congolense, T. brucei and T. simiae isolated from wild-caught Glossina pallidipes were fed to laboratory-reared G. morsitans centralis and G. m. morsitans to determine the effect of host blood at the time of the infective feed on infection rates. Bloodstream forms of trypanosomes were membrane-fed to flies either neat, or mixed with blood from cows, goats, pigs, buffalo, eland, waterbuck and oryx. The use of different bloods for the infective feed resulted in differences in infection rates that were repeatable for both tsetse subspecies and most parasite stocks. Goat, and to a lesser extent, pig blood facilitated infection, producing …

Transmission Of Theileria Parva To Cattle By Rhipicephalus Appendiculatus Adults Fed As Nymphae In Vitro On Infected Blood Through An Artificial Membrane, S. M. Waladde, A. S. Young, S. A. Ochieng, S. N. Mwaura, F. N. Kima

All Peer-Reviewed Publications

A technique is described for the efficient feeding of Rhipicephalus appendiculatus nymphae on cattle blood through an artificial membrane bearing tactile and olfactory stimuli. The effect of four anticoagulation methods on the feeding of nymphae was compared and heparinized blood was found to be the most efficacious, followed by defibrinated blood. Blood treated with acid citrate dextrose (ACD) or ethylenediamine tetraacetate (EDTA) inhibited nymphal feeding. Nymphae fed on heparinized and defibrinated blood obtained engorgement weights within the range of ticks fed on mammalian hosts and they subsequently moulted and fed normally as adults and produced viable eggs. Nymphae fed on …

Dependence Of 3 Nebraska Sandhills Warm-Season Grasses On Vesicular-Arbuscular Mycorrhizae, John J. Brejda, D. H. Yocom, Lowell E. Moser, Steven S. Waller

Department of Agronomy and Horticulture: Faculty Publications

Vesicular-arbuscular mycorrhizae (VAM) are rare or absent in actively eroding soils of the Sandhills. The objective of this study was to determine if 3 major Sandhills warm-season grasses used in reseeding eroded Sandhills sites are highly mycorrhizal dependent, and evaluate the response of VAM at different phosphorus (P) levels. In 2 greenhouse experiments, sand bluestem [Andropogon gerardii var. paucipilus (Nash) Fern.], switchgrass, (Panicum virgatum L.), and prairie sandreed [Calamovilfa longifolio (Hook) Scribn.] were grown in steam-sterilized sand in pots and inoculated with either indigenous Sandhills VAM, Glomus deserticola, or noninoculated. In the second experiment, VAM inoculated …

A Reproductive-Resting Stage In An Harpacticoid Copepod, And The Significance Of Genetically Based Differences Among Populations, D. J. Lonsdale, P. Weissman, Fred C. Dobbs

OES Faculty Publications

Dormancy is an important life-history strategy which allows copepods to increase their fitness by delaying growth and reproduction until harsh environmental conditions have ameliorated. For marine species, the primary strategies identified to date include the production of dormant eggs by shallow-water species, and copepodite overwintering in deep-water species. Herein, we describe a third strategy in which fertilized adult females enter a “reproductive-resting” stage during the late fall that allows them to overwinter and provide a first source of spring naupliar recruitment. This strategy has been observed in the estuarine copepod Coullana canadensis, but may also occur in other species. …

A Continuous Culture Model To Examine Factors That Affect Transduction Among Pseudomonas Aeruginosa, Jean Replicon

Dissertations

No abstract provided.

A Survey Of Opinions And Knowledge Of Parents Of High School Athletes About Athletic Training, Brooke Lynn Bixby

Dissertations and Theses @ UNI

The purpose of this study was to describe the opinions and beliefs of parents of high school athletes in Cedar Falls, IA about the need for a certified athletic trainer to be employed by the high school. Subproblems in this study were to determine: (a) the parents' opinions concerning the importance of athletic trainers, (b) their knowledge and awareness of an athletic trainer's duties and responsibilities, and (c) their willingness to participate in a funding program for a certified ~thletic trainer to be employed at the high ichool. An 18-item questionnaire was mailed to 100 parents of athletes attending Cedar …

South Dakota Beef Cow-Calf Producer Management Practices, Donald Taylor, Dillon M. Feuz

Economics Research Reports (1969 - 2017)

This research report is based on the results of a mail survey of randomly selected South Dakota beef cow-calf operators undertaken during late 1991. The purpose of the survey was to determine the nature of management practices followed by the state's cow-calf producers and whether those practices differ by size and/or location of herd. Attention was given to producers' overall cowcalf, breeding, feeding, and health management practices.

Agriculture News Release - 1992-12-08, United States. Congress. House. Committee On Agriculture, E. De La Garza

Kika de la Garza Congressional Papers - Agriculture Committee News Releases

No abstract provided.

Bacterial Numbers And Activity, Microalgal Biomass And Productivity, And Meiofaunal Distribution In Sediments Naturally Contaminated With Biogenic Bromophenols, Charles C. Steward, James L. Pinckney, Yvette Piceno, Charles R. Lovell

Faculty Publications

Sediment cores were collected inside and outside of a bed of a bromophenol-producing marine polychaete, Notomastus lobatus, and examined for impact of the bromophenols on sediment microflora and meiofauna around N. lobatus burrows. No significant differences were found between microbial parameters measured inside and outside of the N. lobatus bed. Integrated 6 cm cores taken adjacent to N. lobatus burrows contained 1.2 x 10⁹ bacteria ml^-1. Cell numbers were similar at control sites within the bed, but away from burrows, and not significantly different from cell numbers (1.0 X 10⁹ cells ml^-1) at a …

Bulletin No. 33: Archaeology In The Connecticut College Arboretum, Harold D. Juli, Glenn D. Dreyer

Bulletins

No abstract provided.

Nebline, December 1992

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Ag Update: Agricultural News & Events

Home Extension News

On-the-Grow: Horticulture News & Recommendations

The Cloverline: 4-H News and Events

Expanded Food and Nutrition Education Program (EFNEP) News

Extension Calendar

and other extension news

Ard News December 1992

Agricultural Research Division: News and Annual Reports

CONTENTS:

SEASONS GREETINGS
ORGANIZATIONS THAT SUPPORT AGRICULTURAL RESEARCH IN LAND GRANT UNIVERSITIES
ARDC INTEGRATED FARM
THE STATE AGRICULTURAL EXPERIMENT STATION SYSTEM
REPRESENTATION ON REGIONAL COMMITTEES
ARD ADMINISTERED GRANT AND AWARDS PROGRAMS
ARD ADVISORY COUNCIL UPDATE
PROPOSALS SUBMITTED FOR FEDERAL GRANTS
NEW OR REVISED PROJECTS
GRANTS & CONTRACTS RECEIVED OCTOBER & NOVEMBER, 1992

Southeast South Dakota Experiment Farm Annual Progress Report, 1992, Agricultural Experiment Station

Agricultural Experiment Station and Research Farm Annual Reports

This thirty-second annual report of the research program at the Southeast South Dakota Experiment Farm has special significance for those engaged in agriculture and the agriculturally related businesses in the nine county area of southeast South Dakota. Reports in this document include information on: temperatures and precipitation data, corn production and performance, soybean research and planting, soil testing, alfalfa yield test, fertilizer testing, herbicide research, crop rotation, sorghum, small grains, livestock research, and pest and weed control.