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Articles 155431 - 155460 of 159480
Full-Text Articles in Entire DC Network
Kentucky Warbler (Vol. 46, No. 3), Kentucky Library Research Collections
Kentucky Warbler (Vol. 46, No. 3), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Extraction And Partial Purification Of Neurosecretory Substances From The Suprapharyngeal Ganglion Of Lumbricus Terrestris, William D. Vandenbosch
Extraction And Partial Purification Of Neurosecretory Substances From The Suprapharyngeal Ganglion Of Lumbricus Terrestris, William D. Vandenbosch
Masters Theses
No abstract provided.
The Weevil Genus Tychius Germar In America North Of Mexico (Coleoptera: Curculionidae), Wayne Elden Clark
The Weevil Genus Tychius Germar In America North Of Mexico (Coleoptera: Curculionidae), Wayne Elden Clark
Theses and Dissertations
Weevil species assigned to the genus Tychius Germar, 1817, have been described from North and South America, Europe, Africa, Asia and Australia. The majority of approximately 266 species occur in the Mediterranean region (Klima, 1934). Fourteen native and one introduced species are known to occur in North America.
Antibiotic Potential In The Liverworts, Especially Ricciocarpus Natans (L.) And Marchantia Polymorpha (L.), Theodore Roy Shields
Antibiotic Potential In The Liverworts, Especially Ricciocarpus Natans (L.) And Marchantia Polymorpha (L.), Theodore Roy Shields
Masters Theses
No abstract provided.
Production Of Acute Duodenal Ulcers In Rats By Infusion Of Gastric Secretogogues, Thomas John Stout
Production Of Acute Duodenal Ulcers In Rats By Infusion Of Gastric Secretogogues, Thomas John Stout
Masters Theses
The Breeding Biology Of The Mountain Chickadee (Parus Gambeli), Donald Frederick Martin
The Breeding Biology Of The Mountain Chickadee (Parus Gambeli), Donald Frederick Martin
All Master's Theses
The breeding biology of the Mountain Chickadee (Parus gambeli) was studied in 1968, 1969, 1970 in the Robinson Canyon, 13 miles west of Ellensburg, Kittitas County, Washington.
Molecular Weight Determinations Of Some Salmonella Potsdam Bacteriophage Dna's, Winston H. Richards
Molecular Weight Determinations Of Some Salmonella Potsdam Bacteriophage Dna's, Winston H. Richards
Loma Linda University Electronic Theses, Dissertations & Projects
Two group A phages, P9c/2 and P4/2, were studied. Their density, sedimentation velocity, and biochemical properties were compared. Their densities were determined by density gradient centrifugation in 38.3% cesium chloride. Sedimentation velocity was used to determine their molecular weights. To accomplish this, the DNA of P9c/2 and P4/2 was labeled with tritium and T2 DNA, labeled with 32P, was used as a standard. The DNA of P9c/2 and P4/2 was separately mixed with T2 DNA and centrifuged in a 0-15% sucrose gradient. The molecular weights were calculated using the formula D2/D1= (M2 …
Breeding Biology Of The Sage Thrasher, John Wayne Gooding
Breeding Biology Of The Sage Thrasher, John Wayne Gooding
All Master's Theses
The sage thrasher, Oreoscontes montanus (Townsend), is a common bird that breeds throughout the sage brush areas of the Great Basin and from northern Arizona to southern Saskatchewan. Although it is a fairly common and conspicuous bird, almost nothing about its life history has been published. This study was conducted in central Washington during the spring and summer of 1969 and the spring and early summer of 1970. During the 1969 season, emphasis was placed on finding and tracing the phenologies of as many nests as possible in order to determine the timing of the nesting cycle. During the 1970 …
The Effects Of 2-Chloro-4-Ethylamino-6-Isopropylamino-S-Triazine (Atrazine) On The Activities Of Certain Calvin Cycle Enzymes In Barley And Corn, L. Chris Harrison
The Effects Of 2-Chloro-4-Ethylamino-6-Isopropylamino-S-Triazine (Atrazine) On The Activities Of Certain Calvin Cycle Enzymes In Barley And Corn, L. Chris Harrison
Theses and Dissertations
Atrazine (2-chloro-4, ethylamino-6-isopropylaminos- triazine) applied to Hordium vulgare L. variety barbless in low concentrations (0.001, 0.01, 0.1 uM) was shown to in-- crease the activity of D-ribulose-1, 5-diphosphate carboxylase (RuDPCase) and phosphoribulokinase (PRuK) up to 23% and 30% respectively and increase the amount of chlorophyll and extractable protein up to 18% and 21% respectively over the control plants. These results indicate that sub-toxic levels of atrazine significantly stimulate plant growth. Barley plants given higher concentrations of atrazine (1.0 and 10 uM) showed up to a 78% and 42% decrease in the activity of RuDPCase and PRuK respectively as well as …
Asexual Reproduction In Planaria Studies On Inhibition, Hal R. Fitzgerald
Asexual Reproduction In Planaria Studies On Inhibition, Hal R. Fitzgerald
Theses and Dissertations
The invertebrates display several methods of asexual reproduction, such as fission and gemnule formation and budding (Hay, 1966). Planaria reproduce asexually only by fission.
Taxonomy Of The Neotoma Albigula-Group Of Woodrats In Central Mexico, E. Raymond Hall, Hugh H. Genoways
Taxonomy Of The Neotoma Albigula-Group Of Woodrats In Central Mexico, E. Raymond Hall, Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Study of specimens collected from critical localities since 1944 reveals that: Neotoma montezumae and N. leucodon zacatecae are indistinguishable from earlier named taxa; N. latifrons is a subspecies of an earlier named taxon; and N. palatina, previously known from only one specimen and thought by some mammalogists to be merely an aberrant individual of Neotoma albigula, is a species distinct from N. albigula as Goldman tentatively decided when he named it 64 years ago. In the narial passage, the partition formed by the vomer that extends well behind the hard palate as a sword-like projection is present in …
A Syncoeliid (Hemiuroidea Faust, 1929) Metacercaria On A Copepod From The Atlantic Equatorial Current, Robin M. Overstreet
A Syncoeliid (Hemiuroidea Faust, 1929) Metacercaria On A Copepod From The Atlantic Equatorial Current, Robin M. Overstreet
Harold W. Manter Laboratory of Parasitology: Faculty Publications
The complete life cycle for a species of Syncoeliidae Odhner, 1927, is unknown. Adults are known from the branchial cavity and mouth of marine fishes which are usually found offshore, and second intermediate hosts have been reported. Sars (1885, Challenger Rept. Zool. 13: 228 p.) described the metacercaria of Syncoelium filiferum from the perivisceral cavity of the euphausiids Nematoscelis megalops Sars, 1883, and Thysanoessa gregaria Sars, 1883, in the South Atlantic. DoIlfus (1966, Bull. Mus. Natl. Hist. Nat. Ser. 2 38: 195-200) described Metacercaria (Gen. ?) theomonodi from some poorly preserved material amidst a collection of "copepods and chaetognaths" collected …
Lactic Dehydrogenase Isozyme Isolation By Disc Electrophoresis In Eight Species Of Fringillid Birds, Michael Edwin Darling
Lactic Dehydrogenase Isozyme Isolation By Disc Electrophoresis In Eight Species Of Fringillid Birds, Michael Edwin Darling
Dissertations and Theses
Disc electrophoresis of tissue homogenates from eight species of fringillid birds showed five forms of lactic dehydrogenase. The relative amounts of isozymes were characteristic for each species. This paper classifies some members of the families Fringillidae and Carduelidae in terms of lactic dehydrogenase isozymes and compares the results to other methods of classification.
Harvest Mice (Genus Reithrodontomys) Of Nicaragua, J. Knox Jones Jr., Hugh H. Genoways
Harvest Mice (Genus Reithrodontomys) Of Nicaragua, J. Knox Jones Jr., Hugh H. Genoways
University of Nebraska State Museum: Mammalogy Papers
Harvest mice of the genus Reithrodontomys first were reported from Nicaragua by Oldfield Thomas (1907), who originally described Reithrodontomys sumichrasti modestus based on a single specimen from Jinotega. J. A. Allen (1908, 1910) recorded additional specimens of R. s. modestus, which still was the only species known from the country when A. H. Howell (1914) revised the genus Reithrodontomys. In his thorough review of Latin American harvest mice, Hooper (1952) added a second species, Reithrodontomys mexicanus lucifrons, to the Nicaraguan fauna, and Englert (1959) and Anderson and Jones (1960) recorded three additional kinds. The present report treats …
A Development Of A Supplemented Ham's F-10 Medium For The Maintenance Of Thyroid Glands: A Method For Studying The Effect Of Cortisone Acetate On I 131 Uptake, Ronald Taylor
Masters Theses & Specialist Projects
The primary purpose of this investigation is to determine whether thyroid glands may be maintained on a supplemented Ham's F-10 medium and to determine whether this tissue culture may be used under experimental conditions to study the effects of cortisone acetate on thyroidal I131 uptake.
South Dakota Farm & Home Research, Agricultural Experiment Station, South Dakota State University
South Dakota Farm & Home Research, Agricultural Experiment Station, South Dakota State University
South Dakota Farm and Home Research: 1949 -1998
New Office-Lab Building at Southeast Farm [p] 3
Comparing Hay Making Methods [p] 4
Understanding Dutch Elm Disease [p] 8
Super-Layers: More Eggs, Smaller Chickens [p] 13
Adjustments in South Dakota Auction [p] 14
50-Ton-an-Acre Potato Yields [p] 16
For the Record [p] 17
Zinc Supplements for Dairy Cattle [p] 18
Calves Prefer Solid Floor, Sawdust Bedding [p] 20
Oat Yield Losses Due to Weed Control sprays [p] 22
Put Losses to Work If You Can’t Win ’em All [p] 23
Effects of Environment on Beef Cattle [p] 24
Carpet Care, Selection [p] 28
Freeze-Dried Wheat—Potential New Product [p] 32 …
A Study Of The Genus Potentilla In New Mexico, John D. Garcia
A Study Of The Genus Potentilla In New Mexico, John D. Garcia
Biology ETDs
Studies of collections of Potentilla which I made during the summer of 1969, and from collections in The University of New Mexico Herbarium indicate that there are 24 species of Potentilla in New Mexico. These are:
P. fruticosa L. ,P. arguta Pursh, P. fissa Nutt.,P. glandulosa Lindl., P. thurberi A. Gray (and 1 variety),
P. anserina L. (and 1 variety), P pennsylvanica L.,P. plattensis Nutt., P. crinita A. Gray (and 1 variety),
P. pulcherrima Lehm. (and 1 variety), P. ambigens Greene, P. hippiana Lehm. (and 1 variety), P. diversifolia Lehm., P. sierrae-blancae Wooton and Rydb., P. bicrenata Rydb., P. subviscosa …
Comparative Age And Growth Of Two Darters, Percina Peltata (Stauffer) And Percina Notogramma (Raney And Hubbs), In Virginia, Garnett William Link
Comparative Age And Growth Of Two Darters, Percina Peltata (Stauffer) And Percina Notogramma (Raney And Hubbs), In Virginia, Garnett William Link
Master's Theses
Two closely related species or darters, Percina peltata and Percina notogramma, occur sympatrically in Virginia. An analysis or the number of scale annuli and standard length measurements on 447 peltata and 195 notogrannna revealed four year classes in both species, with very few individuals surviving to III-year class. Both species had approximately 1:1 sex ratios after the first year, in which males were predominant. The growth of both species was approximately the same after the first year; however peltata, the larger species, apparently gains an advantage during the first year which it never loses. The sexes did not …
The Effects Of Estradiol And Growth Hormone On Liver And Plasma Protein Of The Hypophysectomized Water Snake, Terry Chong Der
The Effects Of Estradiol And Growth Hormone On Liver And Plasma Protein Of The Hypophysectomized Water Snake, Terry Chong Der
Master's Theses
The effects of estradiol and ovine growth hormone (GH) on liver and plasma protein of hypophysectomized Nat rix fasciata (southern banded water snake) were investigated. Liver and plasma protein concentrations were determined colorimetrically end expressed a mg/gm wet weight tissue.
Significant increases in liver protein levels occurred 48 and 7 hours after a single injection of estradiol in hypophysectomized animals. A single injection of GH had a like effect . Estradiol had a greater effect on liver protein levels than did GH. When estradiol and GH were administered together to hypophysectomized animals there was no apparent additive effect of the …
An Investigation Into The Incidence Of Psychogenic Factors Underlying The Temporomandibular Joint Pain/Dysfunction Syndrome, Ernest William Small
An Investigation Into The Incidence Of Psychogenic Factors Underlying The Temporomandibular Joint Pain/Dysfunction Syndrome, Ernest William Small
Human Movement Studies & Special Education Theses & Dissertations
No abstract.
Erasure Of Sediment Surface Features By Mellita Quinquiesperforata (Leske), Walter Richard Boehmer
Erasure Of Sediment Surface Features By Mellita Quinquiesperforata (Leske), Walter Richard Boehmer
OES Theses and Dissertations
Erasure of sediment surface features by individuals of the species, Mellita guinguiesperforata, observed in this study suggests that all members of the sub-order, Scutellina, are able to erase sediment surface features. Sweep time, the time needed to erase the surface features of an area, depends on the population density, individual size, and speed of movement of the sand dollars. Assuming their pattern of movement as random, the following equation can be used to determine sand dollar sweep time,
T - 3.2 N-0.76 (W / S) (A/ W2 )1.21
where T is sweep time, N is the …
An Evaluation Of Three Techniques For The Quantitative Sampling Of Marsh Invertebrates, John T. Falkenbury
An Evaluation Of Three Techniques For The Quantitative Sampling Of Marsh Invertebrates, John T. Falkenbury
All Master's Theses
The present study was designed to develop, compare, and evaluate three methods for quantitatively sampling the invertebrate standing crop on the water surface of dense cattail (Typha latifolia) marshes at 19 sites around the periphery of Caliche Lake in Grant County, Washington.
Bibliography Of Diseases And Parasites Of Marine Fish And Shellfish (With Emphasis On Commercially Important Species), Carl J. Sindermann
Bibliography Of Diseases And Parasites Of Marine Fish And Shellfish (With Emphasis On Commercially Important Species), Carl J. Sindermann
Harold W. Manter Laboratory of Parasitology: Faculty Publications
The literature on diseases and parasites of marine animals has been accumulating at an accelerating rate in recent decades, and at a seemingly geometrical rate in the past few years. Reviews of selected aspects of the subject have appeared (Cheng, 1967; Sindermann, 1966; Sindermann and Rosenfield, 1967). References listed in these papers include a significant, but still a small part, of the available literature. With the proliferation of journals in many languages throughout the world, a complete bibliography, even in a narrow area of research, is almost an impossibility. Then too, the daily appearance of new published information represents an …
Distribution Of Two Lizards, Cnemidophorus Tigris And C. Scalaris, In Pine Canyon, Big Bend National Park, Texas, Ronald V. Lucchino
Distribution Of Two Lizards, Cnemidophorus Tigris And C. Scalaris, In Pine Canyon, Big Bend National Park, Texas, Ronald V. Lucchino
Biology ETDs
At the lower elevations, 3500 ft or less, in Pine Canyon, Cnemidophorus tigris and c. scalaris occupy the same general areas. Corresponding with a rise in elevation, the increase in vegetation density forces both lizards from the flat terrain into the arroyos that drain the canyon. Of the two species, only C. scalaris is found above an elevation of 4000 ft. At this elevation the coarseness of soil texture in the arroyos becomes evident and the sides of the arroyos are steeper. These changes are the result of the increase in the slope of the canyon.
Air and soil temperatures …
Bulletin No. 17: Preserving Our Freshwater Wetlands, William A. Niering, Richard H. Goodwin, Edward S. Deevey Jr, Betty F. Thomson
Bulletin No. 17: Preserving Our Freshwater Wetlands, William A. Niering, Richard H. Goodwin, Edward S. Deevey Jr, Betty F. Thomson
Bulletins
Reprints of a series of articles on why this is important and how it can be done. 52 pp. 1970.
Osteological And Mylogical Comparisons Of The Head And Thorax Regions Of Cnemidophorus Tigris Septentrionalis Burger And Ameiva Undulata Parva Barbour And Nobel (Family Teiidae), Don Lowell Fisher, Wilmer W. Tanner
Osteological And Mylogical Comparisons Of The Head And Thorax Regions Of Cnemidophorus Tigris Septentrionalis Burger And Ameiva Undulata Parva Barbour And Nobel (Family Teiidae), Don Lowell Fisher, Wilmer W. Tanner
Brigham Young University Science Bulletin, Biological Series
The anterior osteological elements of the skull, lower jaw, and wrist along with the anterior myological characters discussed and figured in this report suggest that A. u. parva and C. t. septentrionalis are members of distinct groups which can be differentiated by internal morphologic characters. Although comparisons were restricted to highly geographically separated individuals of the same family, their general body form and structure appear to be similar.
A great number of anatomical structures are shared in common, but the significant differences between them include:
1. General skull appearance. The skull of C. is generally lighter, that is the bones …
Pinyon-Juniper Succession After Natural Fires On Residual Soils Of Mesa Verde, Colorado, James A. Erdman
Pinyon-Juniper Succession After Natural Fires On Residual Soils Of Mesa Verde, Colorado, James A. Erdman
Brigham Young University Science Bulletin, Biological Series
A mountain brush vegetation typified by Gambel oak (Quercus gambelii) and serviceberry (Amelanchier utahensis) dominates the uplands of Mesa Verde National Park. There is evidence that this brush element is a successional stage that has been maintained by repeated natural fires in a large part of the Mesa Verde landscape. This study was conducted to determine the role of fire in the region's ecology, the nature of the climax pinyon pine (Pinus edulis) and Utah juniper (Juniperus osteosperma) vegetation, and the major successional stages that lead to the climax condition.
Three postburn …
End Matter, Vol. 11 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Hypophyseal Growth Hormone: I. Control Of Secretion, M. Saeed Zafar, Raymond C. Mellinger, Lewis B. Morrow
Hypophyseal Growth Hormone: I. Control Of Secretion, M. Saeed Zafar, Raymond C. Mellinger, Lewis B. Morrow
Henry Ford Hospital Medical Journal
Growth hormone (GH) is a major hormone of the anterior pituitary gland. Once established, its secretion continues throughout life. GH was first recognized in 1866 as a factor controlling growth. More recently, it has been demonstrated as a vital regulator of fat, carboyhdrate and protein metabolism. In fact, GH influence on the intermediary metabolism is the major mechanism by which growth and development are regulated. Numerous hormonal and nonhormonal factors have been shown to modify the basic pattern of GH synthesis and secretion. In this article we have reviewed some of these nonhormonal factors.
Surreptitious Ingestion Of Oral Anticoagulants, Thomas H. Greidanus, Ellis J. Van Slyck, Raymond W. Monto
Surreptitious Ingestion Of Oral Anticoagulants, Thomas H. Greidanus, Ellis J. Van Slyck, Raymond W. Monto
Henry Ford Hospital Medical Journal
Hypoprothrombinemia secondary to surreptitious ingestion of coumarin or indanedione anticoagulants may be a difficult diagnosis for the unsuspecting physician. Four such case reports are presented. The disease should be suspected if the prothrombin time is markedly elevated and the individual is associated with the medical profession or has had previous treatment with oral anticoagulants. The diagnosis is confirmed by finding a deficiency in Factors II (prothrombin), VII, IX, and X and the presence of the coumarin or indanedione anticoagulant in the blood. The motive generally is that of gaining attention rather than committing suicide. Liver disease. Vitamin K deficiency states …