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New Records For Troglobitic Asellids From Northwest Arkansas, Mark D. Schram

Journal of the Arkansas Academy of Science

No abstract provided.

Influence Of Vesicular-Arbuscular Mycorrhizae On Water Movement Through Bouteloua Gracilis (H.B.K.) Lag Ex Steud, Michael F. Allen

Department of Plant Pathology: Faculty Publications

Root growth characteristics and water transport were compared between non-mycorrhizal Bouteloua gracilis and vesicular-arbuscular mycorrhizal Bouteloua gracilis infected with Glomus fasciculatus. Mycorrhizal plants did not have significantly different leaf area or root length from non-mycorrhizal plants, hut did have significantly fewer and shorter root hairs. Mycorrhizal plants had 50% lower leaf resistance with no change in leaf or root water potentials; thus transpiration was increased 100% with a 50% reduction in whole-plant, soil-to-root and root-to-leaf resistance. Assuming that the difference in water uptake was due to transport via the mycorrhizal hyphae, estimated fungus-to-root transport was 2◦8 x 10^{-5 …}

A Comparative Study Of The Chemical Variants Of The Cladonia Pyxidata-Chlorophaea Complex In East-Central Illinois And Northern Michigan, Cheryl A. Cunningham

Masters Theses

This study was one of comparison of chemical variant of the Cladonia pyxidata-chlorophaea complex of east-central Illinois and northern Michigan. A total of 150 collections were made from Coles, Clark, and Lawrence counties in Illinois, and a separate collection of 58 samples was taken from Cheboygan and Emmet counties in Michigan.

Collection sites in Clark county were, Rocky Branch Nature Preserve, near Clarksville, and privately owned land near Martinsville. From Coles county, collections were made at the Stone Quarry Prairie, Lakeview Park, Lincoln Log Cabin State Park, Walker’s Ford, Lakeview Park hill prairie, and a hill prairie north of the …

Diospyros Virginiana: The American Persimmon, Michael P. Quinnett

Masters Theses

The American persimmon (Diospyros virginiana L.) is a deciduous tree native to the Southeastern United States, and is the only genus of the Ebenaceae that is indigenous. This study is a complete reveiw of what is known about this species concerning taxonomy, ecology, morphology, history, distribution, anatomy, cytology, propagation, diseases, and pests, toxicity, chemical composition, and economic values.

The sexuality and fruit production of the persimmon is variable and not well understood. The small bell shaped flowers are usually dioecious, but they may also be monoecious, or monoecious in one year and dioecious in another. In rarer instances they …

Foods And Feeding Of The Redfin Shiner (Notropis Umbratilis) In Coles County, Illinois, Karen Denise High

Masters Theses

Foods and diel feeding activities of the redfin shiner, Notropis umbratilis, were studied in Coles County, Illinois in September, 1981, and monthly from April through September, 1982. A total of 200 stomachs with food were examined. Diptera adults and larvae were the most frequently occurring food item (83%), and also occurred in the highest volume (49%). Coleoptera were the second most frequently occurring item (23%), and accounted for the second largest volume (11%). Larger fish consumed a wider variety of food items. Changes in foods with season were also noted.

Feeding activity on the 24-25 July was greatest in …

Effects Of Pulsed Electric Fields On Mammalian Cell Membranes, Guy K. Smith

Theses and Dissertations

The effect of pulsed electric fields on cell membranes were studied to investigate the effects of an electric field, per se, on biological systems, without the densometric and other technical problems associated with other forms of nonionizing radiation. Exposure of mouse splenocytes to a high voltage pulse resulted in an increase in membrane permeability to K⁺ that was dependent on both the electric field strength and the pulse duration. Exposure to a 2 μsec, 3.0 kV/cm pulse elicited a 50% loss of intracellular K⁺ indicating that the critical transmembrane potential (V_m) at breakdown was 1.26 volts …

Reproductive Biology Of Crossosome (Crossosomataceae), Ron Scogin, Alicia Tatsuno

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Dye Marking Of Antibiotics Used In Treatment Of Mastitis In Dry And Lactating Cows, Richard A. Ellefson

Electronic Theses and Dissertations

Mastitis is the one major disease affecting dairy cows; considerable direct and indirect economic losses can be attributed to mastitis (6). Treatment of mastitis with antibiotic preparations will alleviate most disease symptoms. Problems may arise when cows treated with antibiotics have their milk used for commercial milk processes before antibiotics are clear. They are: 1) some people are allergic to penicillin, and 2) cultured dairy products may not grow because of inhibition. The Food, Drug, and Cosmetic Act established that milk and milk products containing antibiotics are considered adulterated. Due to recent innovations in antibiotics testing The National Conference on …

Rates Of Forest Floor Decomposition And Nutrient Turnover In Aspen, Pine, And Spruce Stands On Two Soils, Donald A. Perala, D.H. Alban

Aspen Bibliography

No abstract provided.

The Extent And Characteristics Of Low Productivity Aspen Areas In Minnesota, Garhard K. Raile, Jerold T. Hahn

Aspen Bibliography

No abstract provided.

An Experiment In Biomass Production: Results From Three Consecutive Harvests Of Cottonwood Alder, Constance A. Harrington, Dean S. Debell, Robert F. Strand

Aspen Bibliography

No abstract provided.

Biomass Equations For Ten Major Tree Species Of The Prairie, T. Singh

Aspen Bibliography

No abstract provided.

Wildlife Conservation In The Soviet Union, Michael L. Wolfe, Douglas R. Weiner

Aspen Bibliography

No abstract provided.

Wildlife--Wild Death: Kenya's Man-Animal Equation, Norman N. Miller

Aspen Bibliography

Kenya's game laws, in comparison to those of ancient England, are tame and mild.

Root Development Of Winter Wheat As Related To Tillage Practice In Western Nebraska, Wallace Wilhelm, L. N. Mielke, Charles R. Fenster

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Tillage practices can influence crop root development. Root distributions were determined for wheat (Triticum aestivum L.) grown in a wheat-fallow rotation during the 1977-1978 winter wheat crop year on an Alliance silt loam (Aridic Argiustoll). The fallow tillage treatments were plow, subtillage, and chemical (no tillage). Each tillage treatment was split into subplots for N application of 0 or 45 kg/ha.

Rooting density was determined by washing the roots in soil cores 7.6 cm in diam by 15 cm long extracted to depths of 90, 105, and 120 cm on 28 Mar., 2 May, and 8 June 1978, respectively. …

Utilization Of The Intact Male For Red Meat Production: A Review, S. C. Seideman, H. R. Cross, R. R. Oltjen, B. D. Schanbacher

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Castration has long been a traditional practice in the United States. Research studies indicate that intact males grow more rapidly, utilize feed more efficiently and produce a higher-yielding carcass with less fat and more edible product. The disadvantages of the intact male include aggressive behavior (bull and boar); undesirable odors and flavors (boar and ram); lower quality grade (bull); lower meat tenderness (bull and ram) and undesirable meat color (bull and ram). Research is needed to develop antemortem and(or) postmortem handling procedures that offset the disadvantages of the intact male so that the meat and livestock industry can take advantage …

Effects Of Contrasting Photoperiods And Temperatures On Performance Traits Of Confinement-Reared Ewe Lambs, B. D. Schanbacher, G. L. Hahn, J. A. Nienaber

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

The effects of contrasting photoperiods (16L:8D vs 8L: 16D) and ambient temperatures (5 C vs 18 C vs 31 C) on performance traits of ewe lambs have been evaluated. Seventy-two lambs were paired and allotted to one of six treatment groups in a 2 • 3 factorial experiment. The lambs were fed a pelleted diet ad libitum. throughout the 14-wk study (i.e., as Iambs progressed from 12 to 26 wk of age). "Analysis of performance and carcass data showed that both photoperiod and temperature affected growth rate (P.05) by treatment. Whereas serum prolactin concentrations were elevated in lambs exposed to …

Evaluation Of Instream Flow Methodologies For Fisheries In Nebraska, Phil Hilgert

Nebraska Game and Parks Commission: Publications

Five instream flow methods were applied to a variety of streams within the state of Nebraska. These were (1) the Tennant method, (2) a modification of the Tennant method, (3) IFG1 A, a single cross-section average-parameter method, (4) the Incremental method, using the WSP hydraulic simulation program, and (5) the Incremental method, using the IFG4 hydraulic simulation program.

Each method was applied following standard published procedures, and instream flow recommendations were developed for the streams addressed using each method separately. Evaluation of the methods showed that the modification of the Tennant method overcame some of the deficiencies of the Tennant …

Waterfowl Production At Malheur National Wildlife Refuge, 1942-1980, John E. Cornely

United States Fish and Wildlife Service: Publications

Malheur National Wildlife Refuge (NWR), Harney County, Oregon, is an important breeding area for Pacific Flyway Waterfowl. Trumpeter swans (Olor buccinator), Canada geese (Branta canadensis), and 14 species of ducks nest at Malheur NWR. The refuge is one of the most important redhead (Aythya americana) nesting areas in the western United States. Malheur NWR was established by President Theodore Roosevelt in 1908, primarily as a nesting area for migratory birds. The refuge also serves as an important migration stop for thousands of waterfowl and other migratory birds. Originally the refuge was called Malheur Lake …

Status Of The Habitat Evaluation Procedures, Mel Schamberger, William B. Krohn

United States Fish and Wildlife Service: Publications

The 1970s was a decade of increased awareness of environmental problems, and emphasis was placed on the development of procedures for predicting impacts of proposed developmental activities on natural systems. Impact assessment has evolved from a focus on species numbers, human use, species richness, and related methods to include the investigation of habitat as a supplemental or alternative approach to environmental planning, mitigation, species management, and impact assessment (Schamberger 1979, U.S. Fish and Wildlife Service 1980a, 1980b). The impetus for habitat-based assessment techniques came primarily from two sources: (1) environmental legislation requiring noneconomic project evaluations; and (2) an awareness within …

Influence Of Cooperative Wildlife And Fishery Units On Graduate Education And Professional Employment, Rollin D. Sparrowe

United States Fish and Wildlife Service: Publications

In June 1982, several private conservation organizations will join the Iowa State University, and the Iowa Conservation Commission, in a 50-year celebration of the Cooperative Research Unit concept. The first Cooperative Wildlife Research Unit began there in 1932 in response to a recognized need for trained biologists and scientific information in the field of wildlife conservation. The unique partnership between federal, state, university, and private entities that resulted, evolved into the current nationwide program. There are currently 21 wildlife units, 26 fishery units, and 3 combined fish and wildlife units at 31 universities in 29 states (Figure O. The Fishery …

Aquatic Biota Of Bank Stabilization Structures On The Missouri River, North Dakota, Ralph M. Burress, Douglas A. Krieger, C. H. Pennington

United States Fish and Wildlife Service: Publications

Biological and physical data were collected from nine habitats on the Missouri River near Washburn, North Dakota. Sampling was conducted from mid-July to mid-October 1979 to compare the relative values of the habitats for fish and macroinvertebrates.

Whey-Caseinate Blends And Lactose Hydrolysis In Yogurt Manufacture, Catherine A. Whalen

Electronic Theses and Dissertations

Yogurt is a highly nutritious cultured dairy product which has been consumed for centuries, particularly in Eastern Europe. Although per capita consumption in the United. States is still far below that of most European countries; yogurt sales in the U.S.A. have increased phenomenally during the past three decades. Yogurt sales in the U.S.A. totaled 7.7 million kg in 1955; 31.8 million kg in 1966; and approximately 227 million kg by 1976 (41). Per capita sales increased 211% from 1970 to 1980 (45). Yogurt is generally manufactured from milk or lowfat milk which has been fortified with extra milk solids. Nonfat …

Use Of Dry Whey And Lactose Hydrolysis In Yogurt Bases, Nagendra P. Shah

Electronic Theses and Dissertations

Yogurt is one of the oldest and most traditional fermented dairy products. Since early times it has been an important food item of the people in the Middle East. Except for its refreshing taste and wholesomeness as a food, no special virtues were claimed for it until early in the 20th century when the bacteriologist, Elie Metchnikoff, who shared a Nobel Prize in 1908, concluded from his studies on the effect of lactic acid bacteria of the digestive tract, that yogurt arrests putrefaction in the intestinal tract and thus might be beneficial to health (55). Attempts to popularize yogurt in …

Association Of Dna With Nuclear Estradiol Receptors Released From Chromatin, Thresia Thomas, Benjamin S. Leung

Journal of the Minnesota Academy of Science

A cell-free system was established to study the role of steroid hormones In transcriptional control. The system consists of hormone-receptor-chromatin complex formation using partially purified receptor and chromatin. Micrococcal nuclease digestion of the complex released a 7S form of receptor. The absorbance at 260 nm also showed a peak in the 7S region of the sucrose gradient. DNAase I digestion caused the 7S receptor to shift to 2.8S form, while RNAase had no effect. When the receptor-chromatin complex was digested with DNAase I, different forms of receptors were observed, depending on the digestion time. Digestion of one minute produced a …

Effects Of Various Hormones On Human Carcinoma Cell Proliferation, Y. L. Gao, B. S. Leung, A. H. Potter, W.C.Y. Yu

Journal of the Minnesota Academy of Science

Cell proliferation of a mammary adenocarcinoma cell line, CAMA-1. is affected by a number of steroid hormones and prolactin in long-term cultures. Estrogenic compounds stimulate cell growth while antiestrogenic compounds inhibit it. Prolactin can synergize the estrogenic effect. Progesterone, glucocorticoid or androgen reduce cell proliferation. Dihydrotestosterone is a very potent inhibitor,- effective at as low as 10 nM, and its effect is independent of estrogen action. Cortisol is a less effective inhibitor at concentrations below 10 nM; at these levels cortisol exhibits a slight inhibition which appears to be unrelated to estrogenic action. However, at higher concentrations, cortisol markedly reduces …

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. Ii. The Occurrence Of Halmyrapseudes Bahamensis Băcescu And Gutu, 1974 (Apseudidae) In The Eastern Gulf With Redescription And Ecological Notes, Jurgen Sieg, Richard W. Heard, John T. Ogle

Gulf and Caribbean Research

Halmyrapseudes bahamensis Băcescu and Gutu, 1974 is reported from two localities in the northeastern Gulf of Mexico. A redescription is presented based on examination of type material and a large collection of Gulf specimens. Ecological notes are presented on the occurrence, seasonality and distribution of H. bahamensis in two tidal marsh systems near St. Marks, Florida. The taxonomic status of H. bahamensis in relation to the two other described species of Halmyrapseudes is discussed.

Electron Microscopic Demonstration Of Neural Connections Using Horseradish Peroxidase: A Comparison Of The Tetramethylbenzidine Procedure With Seven Other Histochemical Methods, Keith A. Carson, M-Marsel Mesulam

Biological Sciences Faculty Publications

Eight methods for the electron microscopic demonstration of horseradish peroxidase (HRP) labeling have been compared in adjacent series of vibratome sections of mouse lumbar spinal cord. The tracer, a HRP-wheat germ agglutinin (WGA) conjugate, was injected into the gastrocnemius muscle complex. Following retrograde axonal transport to the lumbar motor neurons and transganglionic anterograde transport of the tracer to the dorsal horn, the HRP activity was demonstrated in eight series of adjacent sections of lumbar spinal cord using eight methods. These included procedures using tetramethylbenzidine (TMB), benzidine dihydrochloride (BDHC), o-tolidine, paraphenylenediamine-pyrocatechol (PPD-PC), and 4 methods using 3,3'-diaminobenzidine (DAB). All eight methods …

Tanaidacea (Crustacea: Peracardia) Of The Gulf Of Mexico. I. Introduction And An Annotated Bibliography Of Tanaidacea Previously Reported From The Gulf Of Mexico, John T. Ogle, Richard W. Heard, Jurgen Sieg

Gulf and Caribbean Research

A brief summary of the biology and a historical review are presented for the Tanaidacea. An annotated bibliography is provided for published reports and records of Tanaidacea from the Gulf of Mexico.

A Marine Midge From The Gulf Of Mexico, Randall Howard

Gulf and Caribbean Research

The distribution of the marine midge Telmatogeton japonicus Tokunaga (Diptera) is extended into the northwestern Gulf of Mexico. This is the first reported use of offshore oil and gas platforms by marine midges and the first occurrence of this typically rocky shore intertidal group in an offshore environment.