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Articles 9751 - 9780 of 10251
Full-Text Articles in Entire DC Network
The Ecology Of The Western Spotted Frog, Rana Pretiosa Pretiosa Baird And Girard, A Life History Study, Ronald L. Morris, Wilmer W. Tanner
The Ecology Of The Western Spotted Frog, Rana Pretiosa Pretiosa Baird And Girard, A Life History Study, Ronald L. Morris, Wilmer W. Tanner
Great Basin Naturalist
No abstract provided.
Individual Rodent Movements In Upper Sonoran Desert Of Central Nevada, Jon Ghiselin
Individual Rodent Movements In Upper Sonoran Desert Of Central Nevada, Jon Ghiselin
Great Basin Naturalist
No abstract provided.
The Identification Of A Germination Factor For Basidiospores Of Psilocybe Mutans, Neal K. Van Alfen
The Identification Of A Germination Factor For Basidiospores Of Psilocybe Mutans, Neal K. Van Alfen
Theses and Dissertations
Basidiospores of the Basidiomycete Psilocybe mutans have been found to germinate only in the presence of water extracts of animal dung. The chemical nature of the factor present in the dung that induces germination is not known, nor has it ever been isolated· Experiments showed that extracts of bile salts cause the basidiospores to germinate, indicating that since bile salts are found in dung, they may be the factor which stimulates the spores to germinate. Investigations of the properties of the factor in dung show that the factor has solubility properties that are similar to those of the bile acids. …
Inhibition Of Asexual Reproduction In Planaria, Lewis Hafen Leavitt
Inhibition Of Asexual Reproduction In Planaria, Lewis Hafen Leavitt
Theses and Dissertations
Asexual reproduction in the decapitated planaria, Dugesia dorotocephala, is inhibited by an extract of homogenized heads of the same or closely-related species. Decapitated planaria allowed to regenerate have reproduced asexually over 80% of the time, while those that have been cultured in a suspension of head homogenate have had asexual reproduction inhibited to less than 10%. The substance that inhibits asexual reproduction is heat labile. It requires a concentration of 2.0 heads/ml that contains .13 mg protein/ml to effectively inhibit asexual reproduction. A similar concentration of head homogenate from the related planaria, Dugesia tigrina, also contains the inhibitory substance. Head …
Awakenings In The Burned-Over District: New Light On The Historical Setting Of The First Vision, Milton Vaughn Backman Jr.
Awakenings In The Burned-Over District: New Light On The Historical Setting Of The First Vision, Milton Vaughn Backman Jr.
BYU Studies
No abstract provided.
New Records And Species Of Neotropical Bark Beetles (Scolytidae: Coleoptera), Stephen L. Wood
New Records And Species Of Neotropical Bark Beetles (Scolytidae: Coleoptera), Stephen L. Wood
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 10 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 10 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 10 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 10 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
A Study Of The Weevil Tribe Celeuthetini Of The Solomon Islands (Coleoptera: Curculionidae), Vasco M. Tanner
A Study Of The Weevil Tribe Celeuthetini Of The Solomon Islands (Coleoptera: Curculionidae), Vasco M. Tanner
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Syntheses Via Modifications Of The Knorr-Paal Procedure :|Ba. Derivatives Of 2,6-Dioxa-10-Azatricyclo[5.2.1.0[Superscript 4,10]]Decane ; B. Highly Sterically Crowded 1,2,5-Trialkylpyrroles And Pyrrolidines, Weldron Severin Burnham
Syntheses Via Modifications Of The Knorr-Paal Procedure :|Ba. Derivatives Of 2,6-Dioxa-10-Azatricyclo[5.2.1.0[Superscript 4,10]]Decane ; B. Highly Sterically Crowded 1,2,5-Trialkylpyrroles And Pyrrolidines, Weldron Severin Burnham
Theses and Dissertations
Earlier work in these laboratories on the heterotricyclic system 2,6-dioxa-10-azatricyclo[5.2.1.04,10]-decane, formed from 1,4-diketones and 2-amino-1,3-propanediols by a product-water-azeotroping procedure, was extended with the synthesis of analogous compounds, e.g., the 1,4,7-triethyl-, 1,7-dimethyl-4-isopropyl-1,7-diethyl-4-isopropyl-, 1,7-dimethyl-3- and 4-phenyl- compounds. The 1,7-dimethyl heterotricycle, the kinetically-controlled product, was accompanied by the thermodynamically-controlled product, 2-(2,5-dimethyl-1-pyrryl)-1,3-propanediol. The 1,7-diethyl heterotricycle was also accompanied by the isomeric pyrrole as were the 1,7-dimethyl-3- and 4-phenyl compounds. A scheme postulating a common intermediate is presented. The interesting analogous compounds, 1,7-dimethyl-2-oxa-6-thia-10-azatricyclo[5.2.1.04,10]decane, 1,4,7-trimethyl-2,6-dioxa-11-azatricyclo[5.3.1.04,11]undecane and 11-hydroxymethyl- and 11-methyl-9,13-dioxa-14- azatetracyclo[6.5.1.02,7 011,14]tetradeca-2,4,6-triene were also prepared. The syntheses in good yields of a considerable number of moderately to …
A Revision Of Cryptantha Subgenus Oreocarya, Larry Charles Higgins
A Revision Of Cryptantha Subgenus Oreocarya, Larry Charles Higgins
Theses and Dissertations
This study is a taxonomic revision of Cryptantha subgenus Oreocarya (Boraginaceae), together with descriptions of species, synonyms, distribution maps, and discussions. The present treatment recognizes fifty-seven species and fourteen varieties, all separated by means of a comprehensive key. A history of the group, along with a discussion of the distribution, ecology, and phylogeny is presented. As a basis for the comparison of taxa much of the research has been concentrated on morphological variation in herbarium specimens. Particular attention has been directed to a study of pubescence types, branching patterns, flowers, calyces, and the fruit. The herbarium research has been correlated …
Social Structure Of Small Mammal Populations At The National Reactor Testing Station, Idaho, R. Lynn Speth
Social Structure Of Small Mammal Populations At The National Reactor Testing Station, Idaho, R. Lynn Speth
Theses and Dissertations
This investigation examined the social structure of four species of small mammals (Perognathus parvus (Peale), Reithrodontomys megalotis (Baird), Peromyscus maniculatus (Wagner), and Dipodomys ordi (Woodhouse) at the National Reactor Testing Station (NRTS) in Idaho. An understanding of the social structure provides ecological clues concerning the integration of interactions, reproduction, distributions, densities, and diel activities for not only one animal and species, but for a complex of animals interacting with each other.
The Fisheries Of Deer Creek Reservoir, Utah, With Special Emphasis On The Yellow Perch (Perca Flavescens Mitchill), Gale R. Lewellen
The Fisheries Of Deer Creek Reservoir, Utah, With Special Emphasis On The Yellow Perch (Perca Flavescens Mitchill), Gale R. Lewellen
Theses and Dissertations
This thesis is concerned with the fisheries of Deer Creek Reservoir, Wasatch County, Utah, with special emphasis on the yellow perch. The study period was from May 13 to November 24, 1968. Objectives included the determination of size, age, and food habits of the yellow perch. Parasitic occurrences in the perch population by Ligula intestinalis were also recorded as well as the utilization of the perch by the fishermen. Observations on other species of fish including an analysis of rainbow trout stocking programs were also objectives of this thesis. Data was gathered by means of creel census and fish collection …
Ecology Of The Pika (Ochotona Princeps Uinta) In The Uinta Mountains, Utah, Richard D. Bates
Ecology Of The Pika (Ochotona Princeps Uinta) In The Uinta Mountains, Utah, Richard D. Bates
Theses and Dissertations
In North America, pikas (mammal genus Ochotona) are distributed throughout the western mountain ranges where they are mostly restricted to higher elevation talus slides. There are two species in North America, the Alaskan or Collared Pika (Ochotona collaris Nelson) and the American Pika (Ochotona princeps Richardson). The former is found north of 58 degrees north latitude and has no subspeciation, while the latter occurs south of 58 degrees latitude and consists of 35 subspecies isolated on various mountain ranges (Hall and Kelson 1959). In Utah there are nine subspecies, which are mostly distributed in the Wasatch range that runs northeast …
A Study Of Aquatic Fungi In Powell's Slough, Chao-Chih Hsiao
A Study Of Aquatic Fungi In Powell's Slough, Chao-Chih Hsiao
Theses and Dissertations
Aquatic fungi in-Powell's Slough were.studied in 1967 & 1968. Collections were made and water temperature, oxygen content & pH values were measured at weekly intervals. For collections, wire baskets containing substrata were submerged in water for one month. After collecting, substrata were brought to the laboratory. Identification was based on the keys of Sparrow, 1960. Aquatic fungi identified included seven orders, nine families, fifteen genera, and thirty species, from thirty-three collections of fifteen types of substrata. The substrata used in this study were: (i) fruits: apples, rose hips, plums, pears, haws; (ii) twigs: poplar, weeping willow, river birch, weeping white …
A Revision Of The Hedysarum Boreale Complex, Terry Edwin Northstrom
A Revision Of The Hedysarum Boreale Complex, Terry Edwin Northstrom
Theses and Dissertations
The Hedysarum boreale complex consists of all North American Members of the genus Hedysarum which possess free wing auricles, sub-equal calyx teeth, hidden leaflet veins, and wingless loment articles. One species, two subspecies, and three varieties are recognized. The traditional methods of comparative morphology are employed in delimiting species in the herbarium, but pertinent data from field work are also included. The somatic chromosome number was determined for all taxa, and was found in all cases to be 16. Distribution maps, illustrations, and graphical comparisons of taxa are included.
The Wheel In Ancient America, Paul R. Cheesman
The Efficacy Of Haloxon And Thiabendazole As Anthelmintics Against Gastro-Intestinal Nematodes In Sheep, Ferron L. Anderson, Keith H. Hoopes, J. Carl Fox
The Efficacy Of Haloxon And Thiabendazole As Anthelmintics Against Gastro-Intestinal Nematodes In Sheep, Ferron L. Anderson, Keith H. Hoopes, J. Carl Fox
Great Basin Naturalist
No abstract provided.
As Things Stand At The Moment, Hugh Nibley
The Development Of The Juvenile Instructor Under George Q. Cannon And Its Functions In Latter-Day Saint Religious Education, Lawrence R. Flake
The Development Of The Juvenile Instructor Under George Q. Cannon And Its Functions In Latter-Day Saint Religious Education, Lawrence R. Flake
Theses and Dissertations
The success of the Juvenile Instructor magazine, called the Instructor since 1929, owes much to the vision and foresight of its great founder, George Quale Cannon. From a small, crude, four-page paper, first published in 1866, the Juvenile Instructor has developed into a far-reaching and attractive publication, touching the lives of countless thousands in 1969. It has proved to be a great implement of religious education to the Latter-day Saint people and fulfilled four important functions in its early years when Elder Cannon was its editor. It served as the official organ of the Sunday Schools, as a voice of …
The Systematics Of Crotaphytus Wislizeni, The Leopard Lizards (Sauria: Iguanidae). Part Ii. A Review Of The Status Of The Baja California Peninsular Populations And A Description Of A New Subspecies From Cedros Island, Benjamin H. Banta, Wilmer W. Tanner
The Systematics Of Crotaphytus Wislizeni, The Leopard Lizards (Sauria: Iguanidae). Part Ii. A Review Of The Status Of The Baja California Peninsular Populations And A Description Of A New Subspecies From Cedros Island, Benjamin H. Banta, Wilmer W. Tanner
Great Basin Naturalist
No abstract provided.
Saint-Exupéry And “Le Culte Du Passé”, Bertrand Logan Ball Jr.
Saint-Exupéry And “Le Culte Du Passé”, Bertrand Logan Ball Jr.
BYU Studies
No abstract provided.
Satan On The Hearth, Carlton Culmsee
Faunistic Inventory—Byu Ecological Studies At The Nevada Test Site, D Elden Beck, Dorald M. Allred
Faunistic Inventory—Byu Ecological Studies At The Nevada Test Site, D Elden Beck, Dorald M. Allred
Great Basin Naturalist
No abstract provided.