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Surface Characteristics Of Conidia From Monosporous Cultures Of Penicillium Digitatum And Aspergillus Nidulans Var. Echinulatus, Raymond Kunito Fuji

Theses and Dissertations

The purpose of this investigation was to evaluate the possible taxonomic significance of the "rodlet" patterns and spore wall configurations of conidia from monosporous cultures of Penicillium digitatum Saccardo and Aspergillus nidulans Eidam var. echinulatus Fennell & Raper. Freeze-etching the conidiospores from single spore isolates of these fungi revealed that spore wall patterns and configurations vary much too greatly to be of taxonomic importance on the strain and subspecies level. Environmental factors and genetic influences are discussed as possible mechanisms causing the variations of the spore wall configurations. A membrane-like structure that covers the "rodlet" patterns and which hinders spore …

Comparative Effects Of Carbon Dioxide On Coccidian Oocysts From Five Different Host Species, Thomas David Bunch

Theses and Dissertations

Excystation, as applied to the coccidia, is the process by which sporozoites are released from sporocysts and oocysts. Although this process has long been a subject of interest and study, there still remains considerable disagreement among investigators as to the mechanism by which the process occurs and the factors which are involved.

Louisiana Agriculture Magazine, Summer 1969, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Studies Of The Electrical Parameters And Behavioral Effects Of An Eeg ''Seizure Discharge", W. R. Mccrum, R. M. Lee, H. Van Den Ende, L. D. Proctor, J. A. Lee

Henry Ford Hospital Medical Journal

Nemastrina monkeys with multiple electrodes implanted in the amygdaloid area of the brain were used to study the relationship of electrical seizures and overt behavior. The electrical seizures were produced by long duration electrical pulses administered through the implanted electrodes. There appears to be no relationship between this kind of electrical seizure and lever pressing performance. Relationships between depth EEG, depth impedance, DC potential and surface EEG are observed and as a consequence some ideas concerning the genesis of the electroencephalogram are put forth.

The Intestinal Flora Of Triatoma Protracta Protracta (Uhler) (Hemiptera: Reduviidae) Including New Bacterial Isolation Techniques, Stephen A. Nyirady

Loma Linda University Electronic Theses, Dissertations & Projects

A bacteriological procedure for the removal of the intestinal flora of Triatominae is described. Immersion of Triatoma protracta adults and fifth instar nymphs in 5% aqueous formaldehyde for three hours was sufficient to free the integument of these insects of viable bacteria without penetration into the alimentary tract.

Twenty-two adults and 17 fifth instar nymphs of Triatoma protracta protracta were collected from Neotoma lodges in southern California. Eleven of the 17 nymphs molted into adults in the laboratory. With the use of a 2% peracetic acid sterilized custom built plastic germ-free isolator the Triatoma were dissected and various sections of …

The Biological Properties Of Pseudomonas Aeruginosa Bacteriophage 7v, Shirley Phillips Schnider

Dissertations and Theses

The present study was undertaken to define the standard conditions for growth of bacteriophage 7V on its host Pseudomonas aeruginosa strain PS-7 and to determine the factors which affect the quantity and quality of plaques in the plaque count assay. Observations from the single-step growth experiment and single-burst experiment are also included.

Plaque count assays were performed under various environmental conditions. Conditions were selected as "standard" if they yielded: 1) relative maximum number of infective centers per ml of stock 7V phage, 2) clear, haloed plaques at least 2.0 mm in diameter, and 3) reproducible assays limited only by the …

Measurement And Affect Of Ecologically Significant Factors Within A Thermally-Stratified Lake On Bacterial Utilization Of A Humic Acid, Herbert E. Schmidt

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Herbert E. Schmidt on May 19, 1969.

A Comparative Survey Of Soil Microfungi From Three Vegetation Types In Cedar Valley, Utah, Brent T. Wahlquist

Theses and Dissertations

Microfungi were isolated from soil samples by the soil plate method. Soil samples were collected at depths of 0-1", 1-4", and 4-8" both between and beneath the canopy of the dominant vegetation in stands of greasewood, sagebrush, and pinyon-juniper. Salinity, pH, and percent organic matter were measured for each soil sample. A total of 148 strains of fungi representing 141 species and 46 genera were isolated and identified from these alkaline soils, Few strains, including some Aspergilli, occurred only in the more saline greasewood soils, while many strains, including several Penicillia, occurred in both sagebrush and piny-on-juniper soils but were …

Transferable Drug Resistance Among Enterobacteriaceae Isolated From Human Urinary Tract Infections, Donna G. Sieckmann, Norman D. Reed, Carl E. Georgi

Papers in Microbiology

Fifteen sulfonamide-resistant cultures isolated from urinary tract infections in eastern Nebraska were screened for transferable drug resistance by three methods. Seven of the 15 resistant cultures could transfer resistance of varying levels to two or more chemotherapeutic agents. Transfer of drug resistance occurred without accompanying transfer of chromosomal traits and required cell to cell contact. In mixed culture, the number of drug-resistant recipients increased exponentially, reaching a plateau 2 hr after mixing. Spontaneous or artificial elimination of resistance was found to be a rare event. In addition, several drug-sensitive isolates from urinary tract infections were shown to be competent recipients …

An Epidemiological Survey Of Avian Tuberculosis In Livestock, Poultry, And Wild Birds In Rich County, Utah, Royal Thair Carver

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study was conducted in Rich County, Utah to determine the extent of avian tuberculosis in livestock, poultry and wild birds. Sensitivity was elicited in cattle, swine and chickens by tuberculin testing.

The Mycobacterium avium organism was obtained from tissues and specimens of cattle, swine, goats, chickens, magpies and sparrows.

Methods of eradication of avian tuberculosis and the relationship of avian tuberculosis to mammalian tuberculosis are discussed.

Quantitative Evaluation Of Saponin Content In Du Puits Alfalfa Foliage (Medicago Sativa L.) With Trichoderma, Wang Li-Chun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Selections in Du Puits alfalfa (Medicago sativa L. ) were evaluated for saponin content. The data obtained from the Trichoderma bioassay were converted to saponin values by regressions and standard curves. It was necessary to adjust the concentration of alfalfa extract in the bioassay so that the saponin content in alfalfa was estimated in that portion of the curve showing a marked response to saponin. A different regression was established for each group of low and high saponin plants of Du Puits alfalfa. The standard curve prepared with extract of Du Puits alfalfa used on the basis of its …

Methods Of Correcting Iron And Zinc Deficiencies In Peach Trees, Earl Seeley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies were conducted to determine the effects of iron and zinc chelates on these deficiencies. Soil treatments, and foliar treatments with and without urea were used. It was found that in soil treatments at least one pound chelate per tree must be used to significantly increase the iron content of the leaves. The soil treatments did not result in as high a concentration in the leaves early in the season, but they had a residual effect that lasted throughout the entire growing season. Foliar treatments with iron did not effect the foliage that developed after the final application was made. …

Effects Of Gamma Radiation In Concurrence With Certain Environmental Conditions On Lethal And Physio-Chemical Responses Of Penicillium Expansum L., Tsong-Wen Chou

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In vitro investigations were conducted to study the lethal effect of gamma radiation on the fruit spoilage fungus Penicillium expansum under certain environmental conditions, and to study some physio-chemical changes in the fungus induced by the radiation which may be related to the death of the fungus or its ability to invade fruits.

The radiation sensitivity of P. expansum conidia was influenced by such factors as nutritional condition of the post-irradiation media, age of the spores, delayed plating, heat treatment, and chemical sensitizers. Higher survival was obtained when irradiated conidia were plated on Czapek solution agar (sugar-salts medium) than on …

A Histopathological Study Of Rhizoctonia Solani Kuhn Infection Of Resistant And Susceptible Lines Of Lima Bean (Phaseolus Limensis Macf.), Chulevan Bunnag

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of Rhizoctonia solani on the hypocotyls of resistant and susceptible lines of lima bean were studied. The fungus attacks lima bean at one or more stages during host development and causes pre-and -postemergence damping-off, root rot, and foliage blight. The isolate of the fungus used in this study was obtained from infected radishes grown in Salt Lake County, Utah.

The formation of infection cushions and modes of penetration by this fungus was no different on the resistant and susceptible lima bean hypocotyls. The infection process was studied under laboratory conditions. Differential staining showed that the fungal hyphae were …

Overwintering Of Erwinia Amylovora Inside Living Host Tissue In Cache Valley, Utah, G. Doyle Morrill

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Experiments were conducted to see if Erwinia amylovora (Burrill) Winslow et al. overwinters inside living host tissue in Utah. Bacteria, collected from apple, pear, mountain ash, chokecherry and Pyracantha, were used in the experiment. Isolates taken from buds and inner bark plated on nutrient yeast dextrose agar, we re tested by serological and bacteriophage techniques. Those showing positive tests were then inoculated into Bartlett pear seedlings to test virulence.

Both virulent and avirulent isolates were isolated from each species of plant in the experiment. Pathogenic bacteria were isolated from diseased tissue near cankers, as well as from apparently healthy inner …

"Discussing Physical Fitness And Exercise Programs For Adults", Kenneth H. Cooper

Special Collections: Oregon Public Speakers

No abstract provided.

Forestry Bulletin No. 17: Films And Filmstrips On Forestry, Nelson T. Samson

Forestry Bulletins No. 1-25, 1957-1972

"Motion picture films and filmstrips in forestry and related fields are available from many sources in America. This publication is an attempt to provide for foresters and others interested in such aids a convenient means for selecting materials to meet their particular needs."

Western Ironweed: Research On Anatomy, Physiology, Life History And Control, M. K. Mccarty, C. J. Scifres

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Western ironweed (Vernonia baldwini Torr.) is a member of a widespread and diverse genus. The genus is characterized by perennial herbs and shrubs. Weaver and Darland listed the increase of western ironweed, at one time sparsely distributed, as an indication of degeneration of the true prairie. They described the invasion, spread, and ultimate dominance of western ironweed in many pastures after the drought years. Weaver measured ironweed roots to a depth of 11 or 12 ft., and remarked that it was one of "the most abundant and worst weeds in native pastures derived from the true prairie." Research has …

Louisiana Agriculture Magazine, Spring 1969, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Aggressive Man And Aggressive Beast, Allen W. Stokes

Faculty Honor Lectures

Whether man can live in harmeny with his environment depends in great measure en his ability to' live with his fellew man. Can man learn to' engineer human seciety in time to' prevent a helecaust? Mere specifically, can we learn to' prevent aggressien er to' channel it harmlessly? The ethelegist leeks upen man's behavier as just part ef the tetal spectrum ef animal behavier. Therefere, much of what we learn abeut the behavier ef lewer animals sheuld relate to' human behavier.

Aggressien is in the headlines every day, and in the past few years there has been a 'Steady stream …

Osteochondroma Of The Vertebra, C. H. Hickey

Henry Ford Hospital Medical Journal

A seldom considered manifestation of multiple hereditary exostosis — vertebral lesions with and without neurological complications — is discussed. Three additional cases are added to the sparse literature on the subject with hope that the spinal ostetochondroma will be searched for and treated before neurological complications become manifest.

Pathology Of Secretory Otitis: A Temporal Bone Report, Luis F. Perez De Moura, Royal C. Hayden Jr.

Henry Ford Hospital Medical Journal

During the past 10 years, the collection and microscopic examination of human temporal bones has provided the opportunity to correlate clinical symptomatology and findings with histopathology. The case findings in this report support the clinical suspicion of glandular mucosal disease in some forms of secretory otitis media.

The Biology And Ecology Of Trogoderma Glabrum (Herbst) In Stored Grains, Benjamin H. Kantack, Robert Staples

Nebraska Agricultural Experiment Station: Historical Research Bulletins

These investigations were undertaken to determine the distribution and importance of Trogoderma glabrum (Herbst) in stored grain in Nebraska, the ecological factors favoring population increase in stored wheat, corn, and sorghum, and the role T. glabrum might play in disseminating internally the Aspergillus molds commonly encountered in stored grain.

Some Factors Affecting Germination And Seedling Growth Of Scotch Thistle, C. J. Scifres, M. K. Mccarty

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Scotch thistle (Onopordum acanthium L.) is a native of Eurasia. Scotch thistle is found in the grasslands of central Nebraska, with heaviest infestations in Gosper, Dawson, and Valley Counties and limited occurrence in 18 additional counties. The Nebraska Unicameral declared it a noxious weed in 1965. This study measures the effects of some environmental factors on scotch thistle germination and seedling growth, and clarifies some of the interactions of these with inherent characteristics of the achene. The effect of achene coat, stratification, light, temperature, growth regulators, pH, depth of planting, salinity, germination inhibitors, and moisture stress were studied.

Germination And Early Seedling Development Of Musk And Plumeless Thistle, M. K. Mccarty, C. J. Scifres, A. L. Smith, G. L. Horst

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The present study was conducted to determine the effects of some simulated environmental variables on the germination of musk and plumeless thistle achenes. The two species appear to occupy a somewhat similar role in the natural vegetation, and a direct comparison of germination characteristics was sought.

Penicillium Urticae Bainier Enumeration In Soils, Fred A. Norstadt, T. M. Mccalla

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

Studies of stubble-mulched soils from three locations in Nebraska showed larger total counts (bacteria and actinomycetes) and fungi than in plowed soils. Penicilliurn urticae Bainier numbers increased in subtilled soil compared with either plowed soil or subtilled soil with crop residues removed.** P. urticae B. produces patulin, a phytotoxic substance. This organism is regarded as one of the possible sources of the toxicity problem arising in stubble mulching. Penicillium expansum Link and patulin were studied in the apple replant problem.

The purpose of this paper is to present methods to estimate P. urticae B. numbers in soils and demonstrate patulin …

Sweetclover-Weevil Feeding Deterrent B: Isolation And Identification, W. R. Akeson, H.J. Gorz, Francis A. Haskins

Department of Agronomy and Horticulture: Faculty Publications

Deterrent B, a compound apparently involved in the resistance of Melilotus infesta to the sweetclover weevil Sitona cylindricollis, has been isolated from leaves by a combination of preparative paper chromatography, sublimation, and crystallization. The compound has been identified as ammonium nitrate. Isolated deterrent B and ammonium nitrate have identical feeding deterrent activities. Although the deterrent principle was isolated as the ammonium salt, nitrate ion is probably responsible for the deterrent activity in vivo.

Quantitative Plating Of Gamma-Irradiated Cultures Of A Blue-Green Alga, Michael J. Bazin

Journal of the Minnesota Academy of Science

A method for quantitative recovery of the blue-green alga, Anacystis nidulans, after treatment with gamma rays is described, and data for the survival of the alga after exposure to a gamma source is presented. No conclusions could be drown by applying a "multi-target" model relating dosage to survival. Application of the data lo a revised target-theoretical expression which included the effects of a dose-dependent repair mechanism indicates that such a mechanism is present in A. nidulans. The validity of these dose-response models is discussed.

Myxobacterial Columns, Walter Fluegel

Journal of the Minnesota Academy of Science

The soil myxobacterium, Myxococcus fulvus, will produce clavate columns of slime and cells in certain static liquid cultures. The cells protrude from the thicker end of the column like pins in a pincushion. The column's distribution is in an even array. An hypothesis is suggested for the origin of these formations. The columns are not fruiting bodies. Column formation in other fruiting myxobacteria suggests that it is not a unique feature. Only one other fruiting myxobacterium which produced columns has been reported, and that more than two decades ago.

The Ias Bulletin, V3n1, January 1969, Iowa Academy Of Science

IAS Bulletin

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In this issue:

--- Call for Papers
--- Visiting Scientist Program
--- Speakers' Bureau Directory
--- Special Committee Named
--- State-Wide Articulation Committee Appointed
--- Report fromthe ISTS Short Course Committee
--- Constitution Revision
--- Industrial Support Being Solicited
--- Special Bulletin Going Out to all High School Science Teachers
--- Membership Information
--- Academy Representatives Attend AAAS Convention
--- Proceedings for 1967 and 1968
--- Research Grants Awarded
--- New Section to Appear on the 1969 Program
--- Program Notes from Other Sections
--- Eighty-First Session at Cedar Falls
--- Call for Nominations for Teacher Awards
--- Selected …