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Chromosome Numbers Of Angiosperms In Tanzania, L.S. Gill, F.L. S

Tanzania Journal of Science

Chromosome Numbers of 30 taxa of angiosperms from Tanzania are reported. Of these, counts of 8 species are new. The occurrence of B-chromosome in Ornithogalum longibracteatum is reported for the first time.

Incorporation Trends Of (I-C14) Acetate In Pregnancy Lipids Of Various Organs, D.P. Sharma, T. A. Venkitasubramanian

Tanzania Journal of Science

Comparative evaluation of (I-C14) acetate incorporation was studied in ovary, adrenal, blood plasma and placenta in guinea pigs in mid pregnancy. The respective level of incorporation within the sample for total lipids did not differ in pregnancy and non-pregnant states. Placental lipids in general, and phospholipids in particular were highly incorporated in contrast to other organs/tissues. Amongst non-pregnancy total lipids, the blood plasma showed an elevated incorporation over ovarian and adrenal lipids. The ovary in pregnancy revealed depressed incorporation in general, except for esterified cholesterol which contained higher incorporation.  Phosphatidyl choline in adrenal, and phosphatidyl ethanolamine in blood plasma appeared …

Influence Of Previous Liming, N And P Fertilization Of An Oxisol On Grain Yield In Navy Beans, H. O. Mongi, A. P. Uriyo

Tanzania Journal of Science

A field study was initiated towards the end of the 1973 rain season to assess some residual effects of lime, N and P applications to a moderately acid Oxisol (initial pH 5.6; LR 10 tons/ha) on grain yield in navy beans, Phaseolus vulgaris L., grown soon following maize silage. The Oxisol was a sandy clay loam (35:13:52). The design was a split-plot, confounded factorial with 4 levels of lime at 0, 7.5, 10.0 and 12.5 tons agricultural lime/ha; N at 0, 100, 200 and 300 kg N/ha as ammonium sulphate; and P at 0, 40, 80 and 120 kg P/ha …

Effects Of Antifibroblast Antiserum On Cells Derived From Fibroblast Outgrowth Of Human Prostatic Tissues, Eva Shang-Lian King

Dissertations and Theses

The purpose of this investigation was to provide pure cultures of normal human prostatic epithelium free of fibroblasts in order to study malignant conversion by chemical carcinogens. Normal epithelial cells were needed because this was the cell type implicated in prostatic malignancies of human subjects. Unfortunately fibroblasts grew faster than epithelial cells so that cultures were always overgrown with connective tissue elements. It was considered important to find a method which would eliminate fibroblasts so that normal epithelial cells could grow out in pure culture.

Notes On The Natural History Of Plecotus Rafinesquii, Clyde Jones, Royal D. Suttkus

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

A Preliminary Survey Of The Vascular Flora Of Upper Tygarts Creek, Carter County, Kentucky, William Michael Huffaker

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 William Michael Huffaker on July 23, 1975.

A New Species Of Eptesicus From Guadeloupe, Lesser Antilles (Chiroptera: Vespertilionidae), Hugh H. Genoways, Robert J. Baker

University of Nebraska State Museum: Mammalogy Papers

In the course of field studies on bats of the Antillean region, three specimens of the genus Eptesicus were obtained on the island of Guadeloupe in the Lesser Antilles. The nearest known populations of this genus are on Puerto Rico 500 kilometers to the west (E. fuscus wetmorei), on the northern coast of South America 850 kilometers to the southwest (E. fuscus miradorensis), and on Tobago 550 kilometers to the south (E. brasiliensis melanopterus). Study of the specimens from Guadeloupe reveals that they represent a distinct species that is most closely related to Eptesicus …

Two New Species Of The Genus Cycadeoidea From The Lower Cretaceous Of Utah, H. Blaine Furniss

Theses and Dissertations

Cyadeoidea medullara and C. cleavelandii, two new species of the genus Cycadeoidea, have been recovered from the Lower Cretaceous Cedar Mountain Formation of Utah. They have been described in histologic detail and relationships with similar species are set forth. Monoecism and pollination mechanisms have been discussed in connection with C. medullara. This data contributes to our knowledge of the diverse composition of Lower Cretaceous floras in Utah.

A Paleocene Flora From The Fort Union Formation Near Baggs, Carbon County, Wyoming, John L. Roth

Theses and Dissertations

A well-preserved Paleocene flora of 39 species from the Fort Union Formation near Baggs, Carbon County, Wyoming has been studied. This is the first study of the plant megafossils in this area. The most abundant species collected are: Carya antiquorum Platanus nobilis, Cercidiphyllum arcticum and Platanus raynoldsi. Together they represent 74% of the flora. The flora has been dated as Upper Middle Torrejonian. This report is also the first paleoecological study of any North American Paleocene flora. Two methods were used to determine the paleoclimatic conditions of the flora. The first was an analysis of leaf margin characteristics, comparing them …

Bulletin No. 21: Energy Conservation On The Home Grounds: The Role Of Naturalistic Landscaping, William A. Niering, Richard H. Goodwin

Bulletins

No abstract provided.

Stability Of Small Unisexual-Bisexual Populations Of Poeciliopsis (Pisces: Poeciliidae), William S. Moore

Biological Sciences Faculty Research Publications

All-female species of Poeciliopsis depend upon ♂ ♂ of closely related species for sperm. This relationship creates a competitive situation in which bisexual ♀ ♀ compete with unisexual ♀ ♀ for sperm from ♂ ♂ of the bisexual species. Earlier studies demonstrated a sufficient mechanism inherent in the behavior of ♂ ♂ for allowing coexistence in mixed unisexual-bisexual populations. Courtship preference of ♂ ♂ for conspecific ♀ ♀ is dynamically countered by social interaction among ♂ ♂ : subordinate males mate with unisexual ♀ ♀ in impetuous courtships. The Poeciliopsis monacha-Poeciliopsis 2 monacha-lucida complex occurs naturally in small isolated populations …

The Subfamily Leeuwenhoekinae In The Neotropics (Acarina: Trombiculidae), Jack T. Reed, James M. Brennan

Brigham Young University Science Bulletin, Biological Series

Neotropical representatives of the subfamily Leeuwenhoekinae are reviewed. The genus Odontacarus comprises 66 percent of the chiggers examined, and 82 percent of this genus were identified as O. tubercularis (Brennan). The following genera are redescribed: Albeckia Veracammen-Grandjean and Watkins, Leeuwenhoekia Oudemans, Odontacarus Ewing, Sasacarus Brennan and Jones, Wagenaaria Brennan, and Whartonia Ewing. New taxa are: Odontacarus comosus comosus, O. c. novemsetus, O. dienteslargus, O. pugnosus, O. schoenesetosus, O. sunnianae, O. tiptoni, O. tuberculohirsutus, O. vanderhammeni, O. vergrandi, Sasacarus furmani panamensis, and Whartonia angulascuta. Odontacarus fieldi Brennan and Jones, 1961, and O. cayolargoensis Brennan, 1959, are synonymized under O. tubercularis Brennan, …

End Matter, Vol. 20 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Comparative Bioenergetics Of Insects From Young & Old Plant Ecosystems, Joyce Wright

Masters Theses & Specialist Projects

Caloric values of insects and arachnids from two woods and two meadow ecosystems were compared. No significant difference was found between the orders Diptera, Homoptera, Orthoptera, Hemiptera, Hymenoptera, or Coleoptera. Caloric values of the class Arachnida were significantly higher in the woods ecosystem at the .05 level of significance. The order Lepidoptera differed at the .01 level of significance and was also higher in the woods samples. For all orders combined the caloric values of the woods samples were higher than the meadow samples at the .001 level of significance.

No consistent pattern was found in seasonal variation in caloric …

A List Of Venezuela Chiggers, Particularly Of Small Mammalian Hosts (Acarina: Trombiculidae), James M. Brennan, Jack T. Reed

Brigham Young University Science Bulletin, Biological Series

Detailed or summarized records of 136 species in 38 genera with a key to the latter are provided. Of 86 described forms, 49 are new for Venezuela; the remaining undescribed taxa are coded for purposes of this report. A classified host-parasite list is appended.

The Life History Of The Teardrop Darter, Etheostoma Barbouri Kuehne And Small, In Kentucky, Rory Flynn

Masters Theses & Specialist Projects

The life history of the teardrop darter, Etheoctoma (Catonotus) barbouri Kuehne and Small, was intensively studied from September, 1972, through August 1973. A total of 299 teardrop darters was seined from two isolated populations in Alexander and Little Muddy Creeks, Kentucky. These darters are known only to occur in second, third or fourth order tributaries of the Green River in Kentucky and Tennessee, and normally seek protection afforded by rocky or vegetated edges of such streams.

Gonosomatic ratios indicated that teardrop darters spawned from late March through late May in waters 12.5 - 15.5 C. Young females developed primary ova …

Bionomics Of Insects Associated With Corn In The Nebraska Sandhills, J. L. Wedberg, J. B. Campbell, T. J. Helms

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Investigations were conducted in the Nebraska Sandhills to determine the impact of transition from grassland to irrigated corn on selected insect species, to identify indigenous species that may be economically important to corn production, and to provide a point of reference for future development of pest management programs for irrigated corn.

South Dakota Farm And Home Research (Summer 1975), Agricultural Experiment Station, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

This issue includes the 88th Agricultural Experiment Station Annual Report

Agricultural Engineering [p] 3
Animal Science [p] 4
Botany-Biology [p] 7
Chemistry [p] 8
Dairy Science [p] 8
Economics [p] 10
Entomology-Zoology [p] 10
Horticulture-Forestry [p] 12
Microbiology [p] 12
Plant Science [p] 13
Rural Sociology [p] 17
Veterinary Science [p] 17
Wildlife and Fisheries [p] 18
Advisory Groups [p] 19
Staff [p] 20
Contributions to Journals [p] 21
Publications off the Press [p] 27
Budget [p] back cover

Farm, Ranch And Home Quarterly Institute Of Agriculture And Natural Resources, University Of Nebraska- Lincoln

Farm, Ranch and Home Quarterly

In this issue:

3 Agricultural Experiment Station Centennial

4 Rain Is a Sometime Thing

6 Monensin

10 Divorce in the Middle Years

12 Collecting Nebraska's Colorful Agates 1

3 Plan Now for Storing Acid-Treated Corn

14 Pocket Gophers: A Grassland Nuisance

19 Women on Tractors

20 Abandoning Railroad Branch Lines

23 Feedlots and Recreation Ponds

Louisiana Agriculture Magazine, Summer 1975, Lsu Agricultural Experiment Station

Louisiana Agriculture

No abstract provided.

Interactions In The Frequencies Of Electric Organ Discharge By Eigenmannia Virescens (Sternopygidae, Pisces) During Social Behavior, Philip Gaddis

Dissertations and Theses

The extent to which individuals of Eigenmannia virescens modulate their electric organ discharge frequencies to accommodate the frequencies of others of the same species during social interactions was investigated. Recordings of the fish's discharge frequencies, taken with Tektronix 3L5 and 5L4N spectrum analyzers, showed that, although movements of up to 60 Hz in a day may be made, the frequency movements would be made more or less synchronously by all fish in the group. An apparent preference for, and a tendency of the fish to follow one another in frequency, at frequency ratios of 2:3 (a musical fifth), 3:4 (fourth), …

Microbenthic Algal Production Of An Intertidal Sandflat In Little Creek Harbor, Virginia Beach, Virginia, Clayton Barry Shedrow

OES Theses and Dissertations

Estimated annual net microbenthic algal production of an intertidal sandflat on Little Creek Inlet, Virginia Beach, Virginia, was 105 g C/m². Seasonally, primary production was greatest during the summer and fall periods (38 and 49 g C/m², respectively). Productivity was found to vary directly with water temperature and standing crop of benthic diatoms, and inversely with incident solar radiation and standing crops of sedimentary chlorophyll 'a' and 'c'. Orthophosphate and nitrate-N appeared to be limiting factors, nitrate-N more so than orthophosphate. Mean annual net photosynthetic efficiency (based upon total light) for the microphytobenthic community was 0.09%. …

Measurement Of Transpiration In Pinus Teada L. And Liquidambar Styraciflua L. In A Closed Environment Growth Chamber Using Tritiated Water, Jean K. Czoch

Biological Sciences Theses & Dissertations

Transpiration rates of loblolly pine (Pinus taeda L.) and sweetgum (Liguidambar styraciflua L.) were measured at two different water vapor pressure deficits (V.P.D.) in a controlled environment growth chamber using tritiated water as a tracer. The trees were maintained in a sealed plant bed containing a hydroponic nutrient solution. Samples of leaves, chamber air, spiked nutrient and control solutions were assayed for activity using liquid scintillation techniques. The transpiration rate of sweetgum (4.95 ml/hr/gm) was found to be 5 times greater than that of loblolly pine (1.03 ml/hr/gm) at the lower V.P.D. and 8 times greater at …

Genetic Studies Of Cave And Spring Populations Of The Freshwater Amphipod Crustacean Gammarus Minus Say, Steven Wolf Hetrick

Biological Sciences Theses & Dissertations

The amphipod Gammaru. minus has three morphotypes in its Appalachian range : (1) a spring form with well-developed eyes, (2) an intermediate cave form with slightly reduced eyes, and (3) an extreme cave form with greatly reduced eyes. This study compares the genetic structure of populations in two karst areas and analyzes the genetics of populations of the three morphotypes.

Genetic data were collected from populations in the Ward's Cove, Virginia and Greenbrier Valley, West Virginia karst areas using zone electrophoresis zymograms. One hundred percent of the Ward's Cove populations are polymorphic at both MDH-1 and PEP 1 loci …

Front Matter, Vol. 20 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

The Effects Of Heat And Co-60 [Gamma]-Radiation On The Oocysts Of Eimeria Nieschulzi, George A. Conder

Biology ETDs

Sporulated oocysts of Eimeria nieschulzi Dieben, 1924, a rat coccidium, were exposed to radiation, to heat, or to both in an effort to attenuate the parasite. In addition, studies were conducted on the excystation capabilities and infectivity of treated sporozoites and on their immunogenic potential. These observations were correlated with the immune response of the host. Treatments had no effect on oocyst structure but altered the excystation process and decreased the percentage of sporozoites capable of excysting. Moderate levels of radiation, of heat, or of both radiation and heat attenuated the parasite, reduced pathological effect (as judged by oocyst discharge …

The Distribution Of The Deer Mouse, Peromyscus Maniculatus, On The Oregon Side Of The Columbia River Gorge, Ronald P. Neilson

Dissertations and Theses

A study of the biogeography of Peromyscus maniculatus was undertaken in order to ascertain a few of the environmental parameters important in defining the distribution of this species and how the species in turn has adapted to these parameters. The Columbia Gorge was chosen as it presents a climatic gradient from maritime to continental with very little elevation gain. Changes along this gradient in topography, soils and vegetation community structure are discussed.

Amikacin: Clinical And Laboratory Studies, Erwin J. Haas, T. Madhavan, Evelyn J. Fisher, Frank Cox, Keith Burch, Edward L. Quinn, Richard D. Nichols

Henry Ford Hospital Medical Journal

Amikacin was evaluated in vitro against S aureus and a variety of gram negative bacilli. In concentrations of 12.5 μg/ml or less, it suppressed the growth of all organisms except 15% of Proteus mirabilis. Peak serum levels in patients, following a 7.5 mg/kg IM dose, averaged 21 μg/ml at one hour. Most of the drug appeared in the urine during the first six hours after administration. Of six patients receiving an adequate course of treatment, all but one were cured. Treatment in that patient also failed with a subsequent course of gentamicin and carbenicillin and he was cured only by …

Vegetation Development In Relation To Age Of River Stabilization Structures Along A Channelized Segment Of The Missouri River, John Arthur Vaubel

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

During the summer of 1974, I sampled sites of vegetation representative of successional trends in plant communities along the Missouri River floodplain from Sioux City, Iowa, to Rulo, Nebraska. Five district community types listed from youngest to oldest are as follows: Salix spp. – dominated, Populus deltoides – dominated, Platanus occidentalis-Ulmus rubra – dominated, Tilia americana-Quercus rubra – dominated, and Quercus macrocarpa-Carya ovata – dominated vegetation.

The technique of relating vegetation succession to age of river stabilization structures was found to be useful and offered a quite precise method of developing a timescale …

Agricultural Experiment Station News June 1975

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
NEW LEADERSHIP - HORTICULTURE AND WRRI
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS – May 1975
BULLETINS PRINTED