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Shell Growth In The Scallop Argopecten Irradians. I. Isotope Incorporation With Reference To Diurnal Growth, Alfred P. Wheeler, Patricia Blackwelder, Karl M. Wilbur

Marine & Environmental Sciences Faculty Articles

1. Incorporation of calcium and carbonate into shell has been studied in the scallop Argopecten irradians using ⁴⁵Ca and ¹⁴C-bicarbonate.

2. The incorporation of ⁴⁵Ca and ¹⁴C-carbonate into shell was linear with time after a lag period of 1 to 2 hours. The shell-forming mantle tissue attained a steady state with respect to ⁴⁵Ca in the sea water medium within 2 hours.

3. The molar ratio of ⁴⁵Ca to ¹⁴C-carbonate deposited in shell was not significantly different from unity during 5 hours.

4. The rate of incorporation of ¹⁴C-carbonate into shell was …

Depth Doses In The Region Of Overlap Of The Supraclavicular And Internal Mammary Portals In Postoperative Radiation Therapy Of Carcinoma Of The Breast, Joel E. White, Michael Reidy, Murray Boles

Henry Ford Hospital Medical Journal

Computer-generated depth-dose data was obtained for the region of overlap of the internal mammary and supraclavicular portals utilized in post-operative radiation therapy for carcinoma of the breast. A phantom arrangement was created and measurements were obtained and compared with computer-generated depth doses for this arrangement. The actual measured and computer-generated values agreed to within 3%. On the patients measured at the center of the overlap region, the dose was found to vary from 3323 rets to 2571 rets over a depth range of 2-6 cm. It is occasionally the practice to ignore small areas of overlap. The dose at the …

Whole Issue Nebraska Bird Review (June 1975) 43(2)

Nebraska Bird Review

Table of Contents

The Seventy-fourth Annual Meeting ........................................ 22

Blue-Gray Gnatcatcher Breeding in Lancaster County .................................... 23

1974 (Seventeenth) Fall Occurrence Report .................................................... 24

Some Waterfowl Breeding Records for Lancaster County ............................. 40

Anhinga Seen in Nebraska Again ........................................... 41

A Monk Parakeet in the Kearney Area ...................................... 42

Book Reviews ........................................................ 42

Notes .................................................43

A Comparative Study Of Tree Structure And Composition Of A Mixed Coniferous Forest And Sequoia Groves In Sequoia National Park, California, Edwin L. Christiansen

Loma Linda University Electronic Theses, Dissertations & Projects

Forest structure in the giant sequoia grove and in the surrounding mixed coniferous forest is dominated by Abies concolor. The large basal area of Sequoiadendron giganteum is significant within the grove in terms of relative dominance but does not offset the density of Abies concolor which showed nearly identical importance values within and outside the giant sequoia groves.

Forest height and overstory density of the sequoia grove exceeded that of the mixed conifer forest.

The Effect Of Insulin, Fluoride And Methyl Xanthines On The Hypothalamic-Parotid Gland Endocrine Axis, Reagan Ondler

Loma Linda University Electronic Theses, Dissertations & Projects

The purpose of this study was to determine the effect of insulin and fluoride on dentinal fluid movement (FM) in high-sucrose fed rats as mediated through the hypothalamic-parotid gland endocrine axis. In conjunction with the fluoride study, the possible involvement of cAMP was examined through the use of several methyl xanthines which are recognized as phosphodiesterase inhibitors.

Twenty-one day old, male Sprague Dawley rats were maintained on a high-sugar diet (62% sucrose) for 8-9 days at which time intravenous or arterial infusions of insulin, fluoride or the methyl xanthines were performed. Additional procedures included collecting plasma from rats which had …

Raptor Temperature Regulation And Energetics, James Arthur Mosher

Theses and Dissertations

A review of energetics studies of raptorial species introduces four separate studies of temperature regulation by raptors. Golden Eagle (Aquila chrysaetos) nest site selection, as influenced by direction of exposure, is discussed. The data show strong directional preferences to the NNW by southern populations and SSE by northern populations. The tarsometatarsus is shown to have a thermoregulatory function in large falcons, and adaptations of this mechanism to varied habitats are examined. Color phase in Screech Owls (Otus asio) is shown to be related to metabolic differences that may explain the distributions of the color morphs. Development of thermoregulation in Flammulated …

A Biochemical Analysis Of Viscin From Arceuthobium Tsugense, Peter J. Paquet

Dissertations and Theses

The viscin coating of seeds from Arceuthobium tsugense was analyzed histochemically. The results indicated that the viscin is composed of two components. The first is a muculagenous pectic compound which surrounds the entire seed and accounts for a number of observed phenomenon such as stickiness, water holding capacity and the ability to undergo repeated drying and rehydration. The second component is made up of a large number of cellulose strands which are attached to the endocarp and run throughout the pectic coating. Scanning electron micrographs show that they are thought to be important in maintaining the integrity of the pectic …

The Humoral Response Of Inbred Female Rats To Eimeria Nieschulzi Dieben, Lanna Ruth Schoonover Bartholomew

Biology ETDs

The humeral response of 32-day-old specific-pathogen-free Fisher 344 strain inbred albino female rats to a 5,000 sporulated oocyst inoculum of Eimeria nieschulzi at post­inoculation day 0 (PI+0) was followed for 77 days, as were syngeneic uninfected control rats of the same age. Some of these infected rats were challenged with 50,000 sporulated oocysts at PI+15 and followed through PI+77; some were challenged with 50,000 sporulated oocysts at PI+15 and PI+60 and followed through PI+77; and some were challenged with 50,000 sporulated oocysts at PI+60 and followed through PI+77. The Pfizer agarose system of analysis was used for the serum and …

Avian Community Structure In The Sangre De Cristo Mountains, New Mexico, Peter H. Pache

Biology ETDs

Three avian communities (spruce-fir, aspen, and pinon-juniper) were studied from April to August, 1973, in the Sangre de Cristo Mountains, in north-central New Mexico. An additional pinon-juniper community was studied from June to August, 1973, in the Manzano Mountains, east of Albuquerque, New Mexico. The Emlen technique (1971) was used and evaluated. Transects one mile in length were set-up in the above communities and song and non-song detections were tabulated out to a 412-foot (126 meter) line on both sides of the transect. This census method appears more realistic, in terms of community complexity, than the expansion census methods; however, …

An Evaluation Of The Fishery Resources Of The Thames River Watershed, Connecticut, Connecticut Department Of Environmental Protection

Storrs Agricultural Experiment Station

No abstract provided.

Leaf Freckles And Wilt Of Corn Incited By Corynebacterium Nebraskense Schuster, Hoff, Mandel, Lazar, 1972, M. L. Schuster

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The new bacterial disease Leaf Freckles and Wilt (LFW) of corn (Zea mays L.) was first observed in 1969 on two farms in southcentral Nebraska. Since then it has spread to other areas in the state. LFW is a serious disease on farms in six Nebraska counties (Clay, Custer, Dawson, Furnas, Hall and Phelps) and has been found in isolated cases in at least 28 other counties. In 1971 LFW was found in a seedcorn field in western Iowa, in 1973 in two Kansas counties, and in 1974 in South Dakota and Colorado. Because of its explosive nature, several …

Lethatlity Of And Elicitation Of Protective Antibody By Vibrio Parahaemolyticus Attc 17803, Richard Carlucci

Masters Theses & Specialist Projects

The LD₅₀ of Vibrio parahaemolyticus ATCC 17803 for 13- to 18-g male mice, strain ICR, as determined by the 50% endpoint method, was found to be an estimated 7 x 10⁷ CFU, when administered intraperitoneally in 0.5 ml of 24-h broth culture, O. D. 0.5 at 650 nm, diluted to 10^-0.72.

The elicitation of protective antibody by this bacterium in male New Zealand White rabbits was demonstrated by testing control, baseline, and hyperimmune rabbit sera for their protective effect against 2 LD₅₀ of the bacterium administered intraperitoneally in 13- to 18-g male mice, strain ICR. …

Structure & Composition Of A Climax Forest System In Boone County, Kentucky, Michael Held

Masters Theses & Specialist Projects

The structure and composition of a 52 hectare mature mesic hardwood forest in Boone County, Kentucky was studied during 1973-74. Acer saccharum was the dominant tree species of the entire forest, with Fraxinus americana as the subdominant. In the understory vegetation, Acer and Fraxinus were among the dominant genera, thus this forest system can be described as being at the climax stage of development. A previously cleared area in the forest was also analyzed. It was found that the dominant tree species of the canopy were also dominant in the genera of the understory in the disturbed area, indicating a …

Anatomical & Phenological Variation Of Liquidambar Styraciflua L. Under Controlled Environmental Conditions, William Randel

Masters Theses & Specialist Projects

A large degree of variation in fiber tracheid length, wood specific gravity, and time of apical bud formation existed within two populations of Liquidambar styraciflua L. from south central Kentucky. The variation exhibited by these populations may be attributed to the self-sterility of Liquidambar and the variable environment of south central Kentucky.

Variation of fiber tracheid length and wood specific gravity within the two populations was significant. Fiber tracheid length was dependent on temperature and photoperiod while wood specific gravity was primarily dependent on temperature. A significant level of variation was also evident between the two populations regarding tracheid length. …

Effects Of Photoperiod, Temperature And Preconditioning On The Molt Cycle Of Samples From A Michigan Population Of Orconectes Immunis (Hagen), Robert Van Hoff

Masters Theses & Specialist Projects

Immature Orconectes immunis were obtained from Michigan in August, 1973, and July 1974 to determine the effects of photoperiod and temperature on the molt cycle of the crayfish and to test the effects of preconditioning on this species at a cold (7C) temperature from 45 to 90 days. Two sets of 3 experiments were conducted, each involving photoperiod, temperature and preconditioning. The first experiment of each set was initiated within a day after bringing the animals from the field, the subsequent two experiments of each set being initiated at 45-day intervals thereafter.

There were significant responses to photoperiod among the …

Kentucky Warbler (Vol. 51, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

The Metabolism Of Tartaric Acid By Aspergillus Ficuum, Larry Daniel

Masters Theses & Specialist Projects

Soil samples were screened for organisms which decompose tartaric acid as an energy source. Several microorganisms were isolated which were capable of metabolizing tartaric acid. The organism which grew best was identified as Aspergillus ficuum and used in this study. This organism, when grown in tartrate medium, resulted in a decrease in optical rotation and density of the culture medium. The pH of the culture filtrate increased with a concurrent increase in mycelial weight. Analysis of culture filtrates by gas chromatography indicate that the first intermediate compound detected in tartrate decomposition by A. ficuum is glycolic acid. The terminal metabolite …

Collections Of Recent Mammals In North America, Jerry R. Choate, Hugh H. Genoways

University of Nebraska State Museum: Mammalogy Papers

Mammalogy is the only systematic discipline that has previously undertaken periodic (that is, more than one) surveys of its holdings in North American collections. The first such survey (reported on by Howell, 1923) pertained to mammals in collections as of April of 1922. The report of the second survey (Doutt et al., 1945) summarized collections of mammals in North America as of 1943. The report of the third survey (Anderson et al., 1963) pertained to specimens of mammals in North American collections as of 1962. At that time, it was assumed that to prepare an updated report on North American …

Agricultural Experiment Station News May 1975

Agricultural Research Division: News and Annual Reports

CONTENTS:
EXPERIMENT STATION CENTENNIAL YEAR
PROMOTIONS
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – April 1975

Effects Of The Toxins Of The Ectoproct, Lophopodella Carteri, On Oxygen Consumption In Gill Tissues Of The Bluegill, Lepomis Macrochirus, Barbara Harper Green

Master's Theses

Large and small bluegill, Lepomis macrochirus, were exposed to homogena tes of Lophopodella carteri, an ectoproct that contains substances toxic to some gilled vertebrates. Oxygen consumption tests on the excised gill tissues of the bluegill indicated that the ectoproct toxins caused a lowering of oxygen consumption of the gill tissues. Oxygen consumption of the gill tissues of the smaller fish was reduced to a greater extent than that of larger fish. An inverse relationship was found be tween the temperature of the medium and the period of time for death to occur. It is proposed that the toxins cause physiological …

Respiratory Metabolism And Energy Requirements Of Embryo, Larval And Juvenile Mountain Whitefish, Prosopium Williamsoni, Pokkavil Karunakara Rajagopal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The upper optimum temperature for embryonic development of mountain whitefish is 6 C, and for the post yolk sac stage is 9 to 12 C. The need to know effects on all stages in the life cycle in cases of thermal pollution is demonstrated. Abnormalities caused by thermal pollution in hatched larvae were agape jaws, coloboma or fissure of the eye, monophthalmia or the presence of only one eye, monomicrophthalmia or the presence of one small eye and one case of twinning. High mortalities of eggs occurred at 9 C and higher.

Study of the energy expenditure, by the dry …

Seasonal And Spatial Variation In Primary Productivity In Boulder Basin, Lake Mead, Clark County, Nevada, Isamu Aoki

Publications (WR)

The ¹⁴C light and dark bottle technique for measurement of primary production was utilized as a means of assessing the amount of inorganic carbon being converted Into organic form by the photosynthesis of phytoplankton populations In the Boulder Basin of Lake Mead.

Spatial and time series changes of productivity levels observed at eight sampling locations within Boulder Basin Indicate that the Influence of treated municipal arts' industrial effluent flowing into Les Vegas Bay is contributing high levels of available nutrients at Las Vegas Wash Inlet to cause productivity to approximate those levels associated with polluted waters.

Productivity levels at …

Dispersion Of The Host Specific Phytophagous Insects Of Duncecap Larkspur (Delphinium Occidentale) In The Wasatch Mountains Of Utah, Robert L. Bayn Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Populations of Delphinium occidentale (Ranunculaceae)were monitored over two summers for the presence and dispersion of various life stages of several host specific phytophagous insects. Observations were made at several sites in the Wasatch National Forest east of Logan, Utah. Two species of larkspur aphid (Aphis rociadae and Kakimia wahinkae) were encountered. Although dispersal of alate individuals resulted in widespread infestation of the host plant population, aphids occurred initially on the same one or few plants at each site both springs. Little coexistence of the two species of aphid on the same plant was observed, perhaps because they partitioned …

A Comparison Of Three Methods Used To Analyze Pronghorn Antelope Diets, Leonard J. Shandruk

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An increasing interest in fecal analysis as a method of determining diets of herbivores prompted research to determine if this method could be used successfully to determine diets of pronghorn antelope found in Utah's cold desert rangelands. In addition to fecal analysis, quantitative estimates of pronghorn diets were derived from rumen analysis and feeding site observations. Rumen samples were analyzed by three different methods: (1) microscopic, (2) gravimetric, and (3) point frame. In addition to field experiments, samples from a feeding trial with a diet of known composition were used to determine whether or not differential digestion of plant epidermis …

Stability Of Stream Communities Exposed To Underground Nuclear Tests On Amchitka, Aleutian Islands, Alaska, Richard Ames Valdez

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A major bioenvironmental effect of The United States Atomic Energy Commission's Underground Nuclear Testing Program on Amchitka Island, Alaska was the decimation of stream communities by drilling muds from the device emplacement holes. These muds reached two of these streams 4 months and 2 years before the Milrow and Cannikin tests, respectively. Recolonization of fishes and macroinvertebrates in these small streams (Clevenger and White Alice Creeks) began 1 month after spill abatement.

Complete recovery of Dolly Varden in Clevenger Creek occurred less than 5 years after the spill. Of the other native fishes, pink salmon spawned 1 1/2 years after …

Effect Of Zinc Nutriture And Contraceptive Steroid Injection On Body Composition Of Young Female Rats, Sang Ai Hahn

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Forty-nine female rats initially weighing about 95 grams were used in this experiment to determine the effect of contraceptive hormones on body composition in zinc deficient and zinc supplemented rats. Four treatment groups were: 2 ppm of dietary zinc with daily contraceptive steroid injections, or with placebo injection, and 140 ppm of dietary zinc with contraceptive steroid injection or with placebo. The daily injected steroids consisted of 0.1ug of Ethynyl Estradiol and 0.1mg of Medroxyprogesterone in 0.1ml of corn oil. Non-hormone treated groups received 0.1ml of plain corn oil. All injections were administered into the Gluteus Maximus muscle. Food intake, …

Evaluation Of A Vapor Pressure Osmometer For Determination Of Added Water In Milk, Kietipong Pensiripun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A Wescor Vapor Pressure Osmometer measured the osmolality of a solution by sensing the vapor pressure above the solution in a closed chamber. The instrument sensing element comprised a precision thermocouple which measured the dew point temperature depression, a function of the water vapor pressure in the chamber. It used approximately 5-7 microliter samples to saturate a 0.64 cm filter paper disc. The instrument fixed a milliosmolal digital reading and signaled test completion in 110 seconds. The instrument weighed approximately 3. 62 kilograms, was 26. 7 x 24. 1 x 10. 2 cms in size and had a range of …

Comparison Of Compatibility Of Streptococcus Starters In Reconstituted Nonfat Dry Milk And A Whey-Based Bacteriophage Inhibitory Medium, Clinton K. Searle

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Compatibility of mixed cultures of Streptococcus lactis and Streptococcus cremoris were studied by the phage tracer technique in 10% nonfat dry milk and a whey-based phage inhibitory medium. Methods of membrane dialysis and differential enumeration were tried and abandoned. Dominance occurred in nonfat dry milk and in the whey-based medium during a continuous fermentation period within a pH range 6.8 to 5.2. The dominance pattern of two-strain combinations in 10% nonfat dry milk was different from that in the whey-based media. Dominance varied from one strain to another in no consistent sequence in some combinations. Dominance patterns of combinations were …

A Five-Year Follow-Up Study: Relationship Of The High Pufa Diet Used In Original Study Of Middle-Aged Adults To Present Dietary Choices, Rate Of Erythrocyte Hemolysis And Serum Cholesterol And Triglyceride Values, Jeanette Parsons Egan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study was a follow-up of the Christiansen study which was completed in 1967. Dr. Christiansen's 26 subjects ranged in age from 33 to 60 years. Ten were designated as controls and the other 16 were placed on a high polyunsaturated fatty acid (PUFA) diet for a period of 26 weeks.

The purpose of doing a follow-up was to determine what effect the study had on present dietary patterns, serum lipid levels and rate of erythrocyte hemolysis.

Eighteen of the original subjects participated in this study. Of these 18, nine were from the control group and nine were from the …

Evaluation, Assay, Distribution, And Survey Of Staphylococcus Aureus Thermonuclease In Milk And Cheese Products, Gene Leong Hong

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The metachromatic agar-diffusion test of Lachica, Hoeprich, and Genigeorgis (1971) was modified by adding 17 ml of the agar medium to a 100 by 15 mm plastic petri dish, using 5 µl samples and 3 mm wells. The test detected 0.5 ng/ml of thermonuclease in 3 hr at 37 C. This was equivalent to 10⁶ to 10⁷ cells/ml of Staphylococcus aureus strains 196 E, 14458, and 19095 grown in Brain Heart Infusion (BHI) broth. The test sensitivity was decreased ten fold in raw and pasteurized milk.

One-half gram of cheese was dissolved in 4.5 ml of 0.1 M …