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Articles 111421 - 111450 of 114032
Full-Text Articles in Entire DC Network
A Discussion Of Multicolor Stains, Bryce C. Cochran
A Discussion Of Multicolor Stains, Bryce C. Cochran
Biology Honors Papers
This 13 page thesis discusses the need for staining in histological procedures and examines the use of multicolored stains to identify tissues and parts of cells.
The Finishing Of The Stained Slide: A Discussion Of The Various Mounting Media And A Brief Excursion Into The Newer Substitutes For Cover Glasses, Jean Clawson
Biology Honors Papers
This 32 page thesis examines steps in the preparation of microscopic slides, the choice and history of various slide media and substitutes for cover glasses.
Artificial Parthenogenesis In Rana Pipiens, Frank A. Lippi Jr.
Artificial Parthenogenesis In Rana Pipiens, Frank A. Lippi Jr.
Biology Honors Papers
This 39 page thesis provides a history of artificial parthenogenetic experiments and examines the technique by using frogs' eggs.
Dr. Benno Matthes: An Early Texas Herpetologist, S. W. Geiser
Dr. Benno Matthes: An Early Texas Herpetologist, S. W. Geiser
Field and Laboratory
Texas has long been known as the herpetologist's paradise. A large number of species are distributed through the great distances from Amarillo to Brownsville, and Texarkana to El Paso. Naturalists have collected reptiles for many years in the State; and Texan species are in museums throughout the world.
Stability Of Boulders On Slopes In The Finlay Mountains, Texas, Ben R. Howard Jr.
Stability Of Boulders On Slopes In The Finlay Mountains, Texas, Ben R. Howard Jr.
Field and Laboratory
In a recent note the writer and his associates showed that Indian petroglyphs might be used as criteria to indicate the stability of boulders resting on relatively steep slopes. Space did not permit a full account of the data which led to this suggestion. Accordingly, it is the purpose of this paper to amplify these data with a more complete description.
An Indian Camp Site In The Northern Finlay Mountains, Hudspeth County, Texas, Keith F. Walker, David W. Trexler
An Indian Camp Site In The Northern Finlay Mountains, Hudspeth County, Texas, Keith F. Walker, David W. Trexler
Field and Laboratory
During the summer of 1939 a geological field class from Southern Methodist University, working in the Finlay Mountains of Hudspeth County, Trans-Pecos Texas, was impressed by the number of old Indian camp sites. The following summer the authors on a similar trip to the same area were able to spend several days in studying one of these.
Studies On The Food Habits And Behavior Of The Thirteen-Lined Ground Squirrel (Citellus Tridecemlineatus Tridecemlineatus (Mitchell)) In The Laboratory, Mary Elizabeth Schmitt
Studies On The Food Habits And Behavior Of The Thirteen-Lined Ground Squirrel (Citellus Tridecemlineatus Tridecemlineatus (Mitchell)) In The Laboratory, Mary Elizabeth Schmitt
Bachelors’ Theses
The scientific name first applied to the thirteen-lined ground squirrel was Scuirus tridecemlineatus by Mitchell in 1821. The same species has also been referred to as Spermophilus tridecemlineatus. At the present time it is recognized as belonging to the genus Cltellus and the species is divided into geographical races. Most of the middle western part of North America is the natural habitat of the thirteen-lined ground squirrel — Cltellus tridecemlineatus tridecemlineatus. So greatly have they increased with the expansion of cultivated areas and so vast is their destruction to growing crops that they have created a situation that must be …
Studies Of The Histology Of The Digestive System Of The Reptiles, Dorothy Ruth Marie Kaduck
Studies Of The Histology Of The Digestive System Of The Reptiles, Dorothy Ruth Marie Kaduck
Bachelors’ Theses
The normal histology or the Vertebrates as a group is not as wall known as is generally supposed, and in many cases we find that our meagre knowledge rests upon uncertain investigations and vague generalized studies. Among all of the classes· of Vertebrates, with the possible exception of the Pisces, the Reptilia represent the major gap in our information.
The Effects Of A Carbohydrate Deficient Diet On The Mouse, Walter Rudolph Sala
The Effects Of A Carbohydrate Deficient Diet On The Mouse, Walter Rudolph Sala
Bachelors’ Theses
Deficient diets have been used extensively as the basis for zoological experiments concerning the metabolism, and dietary requirements of individual animals. The majority of this work has been carried on with the rat as the subject, and resulting external physical variations as the experimental aim. The writer used the mouse as his subject, but, since no literature was available concerning this animal, a few similar experiments performed on the rat will be cited.
The Direct Action Of Ovarian Follicular Hormone On The Uterus And Appendages Of The Mouse, William L. Backus
The Direct Action Of Ovarian Follicular Hormone On The Uterus And Appendages Of The Mouse, William L. Backus
Bachelors’ Theses
The investigation dealt with the direct action of ovarian follicular hormone, ESTROLIN, on the uteri, the oviducts, and the ovaries of normal female albino mice.
The Thorax Musculature Of The Tenebrio Molitor, Francis L. Boyle
The Thorax Musculature Of The Tenebrio Molitor, Francis L. Boyle
Bachelors’ Theses
Very little, if any, work has been done on the thorax musculature in · the larvae stage of insects. The work that has been done has been confined mostly to the muscles of the abdominal region. From this work it has been found that extraordinary differences in muscle pattern occur often between larvae and adult stages of the same species. Since the muscles of all insects are more or less comparatively the same, what is true of one .will be generally true of another. There may be slight variations found between the abdominal segments and head segments but these differences …
The Effect Of Irradiation Upon The Fecundity Of Drosophila Melanogaster, Arnt M. Erickson
The Effect Of Irradiation Upon The Fecundity Of Drosophila Melanogaster, Arnt M. Erickson
Bachelors’ Theses
Many animals and plants are being subjected to irradiation of various types with the object of discovering the effect upon the development of the organism. This type of experimentation is still in its initial stages. The considerations which led to the choice of the fruit fly, Drosophila melanogaster, for the investigation were briefly the following: (a) its small size which insures that all parts of the ~ animal will receive approximately equal exposures to the radiations; (b} the fact that it passes through a pupal stage during which it may be conveniently manipulated in such irradiation work; (c) the …
The Effect Of Vitamin B1 On The Growth Of Paramecium Multimicronucleatum, Irene Alma Herbst
The Effect Of Vitamin B1 On The Growth Of Paramecium Multimicronucleatum, Irene Alma Herbst
Bachelors’ Theses
The effect of Vitamins on the growth and development of plants and animals has created a great deal of interest in the scientific world.
Cytological Variances In The Variegated Tropaeolum, Leonard F. Laskowski Jr.
Cytological Variances In The Variegated Tropaeolum, Leonard F. Laskowski Jr.
Bachelors’ Theses
Tropaeolum majus and Tropaeolum minus, our common garden Nasturtiums, which are native to Peru, have been studied to some extent as to their heriditary characteristics in regards to the leaf and flower but little work has been accomplished on the cytological variances of the variegated and the non-variegated leaved varieties.
Normal Variation In Growth Rate Of Mice, Helene Gysin
Normal Variation In Growth Rate Of Mice, Helene Gysin
Bachelors’ Theses
Although there has been extensive research carried on with growth variations of rats, there has been comparatively little done on this subject with respect to mice. Stefan Kopec (1938) carried out an experiment in which 24, 000 daily weights were taken of 3 female and 49 male black - and - white - spotted, white, and lilac mice, all sexually mature. He found that males showed non-cyclic weight increase with irregular fluctuations, while the females showed marked cycles of weight change. These
cycles appeared at the time when sexual maturity was attained; decreased in intensity with age, and ended with …
Analysis Of Rocky Mountain Mule Deer Kill Records Of Five-Year Deer Removal From The Logan River Drainage Of Northern Utah, Wilmur Bartels
Analysis Of Rocky Mountain Mule Deer Kill Records Of Five-Year Deer Removal From The Logan River Drainage Of Northern Utah, Wilmur Bartels
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Checking stations operated during the deer hunting season serve a two-fold purpose. It has long been recognized that such inspection stations aid greatly in the enforcement of hunting laws through the detection of illegal practices, and in many cases have been set up with this as a primary purpose. A more far reaching objective, however, is the collection of information to aid in the solution of the problems of maintenance of the range and the deer herd, and determination of the quality and quantity of the deer removal.
Wool Scouring Tests In Utah, Alma C. Esplin
Wool Scouring Tests In Utah, Alma C. Esplin
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Wool as it is shorn from the sheep, is known as grease wool. The first step in the manufacturing of wool is scouring, or removal of all grease and foreign matter. Within any given grade, as determined by length of staple and fineness of fiber, the yield of clean wool is the primary factor in determining the value of the original grease wool. The price of scoured or clean wool is multiplied by the percentage yield of clean wool to determine the value of the grease wool.
Fifty-Fifth Annual Meeting Of The Iowa Academy Of Science And The Tenth Annual Convention Of The Junior Academy Of Science Of Iowa, April 25 And 26, 1941, Iowa Academy Of Science
Fifty-Fifth Annual Meeting Of The Iowa Academy Of Science And The Tenth Annual Convention Of The Junior Academy Of Science Of Iowa, April 25 And 26, 1941, Iowa Academy Of Science
Iowa Academy of Science Documents
No abstract provided.
Letter To Jane Claire Dirks Acknowledging Smithsonian Specimen Contributions, Paul Bartsch
Letter To Jane Claire Dirks Acknowledging Smithsonian Specimen Contributions, Paul Bartsch
Jane Claire Dirks-Edmunds Documents
Many of the specimens collected by Jane Claire Dirks (later Jane Claire Dirks-Edmunds) went on to become part of her colleagues' collections. In this letter, Paul Bartsch, Curator of the the Divisions of Mollusks and Cenozoic Invertebrates at the Smithsonian Institution, thanks Dirks for shells she sent to the museum.
Observations On Vitrified And Frozen Muscle Fibers In Polarized Light, Gregory Thoennes
Observations On Vitrified And Frozen Muscle Fibers In Polarized Light, Gregory Thoennes
Journal of the Minnesota Academy of Science
No abstract provided.
Nutrition Of The Wax Moth Larvae. Vitamin Requirement. I. Requirement For Vitamin B, Mykola H. Haydak
Nutrition Of The Wax Moth Larvae. Vitamin Requirement. I. Requirement For Vitamin B, Mykola H. Haydak
Journal of the Minnesota Academy of Science
No abstract provided.
Five Generations Of Cerebellar Ataxia In The Human And Possibilities Of Its Genetic Control, C. P. Oliver, R. Gray
Five Generations Of Cerebellar Ataxia In The Human And Possibilities Of Its Genetic Control, C. P. Oliver, R. Gray
Journal of the Minnesota Academy of Science
No abstract provided.
Hardiness Of Woody Plants In Minnesota, H. E. Stork
Hardiness Of Woody Plants In Minnesota, H. E. Stork
Journal of the Minnesota Academy of Science
No abstract provided.
A Management Program For Minnesota Muskrat, Paul R. Highby
A Management Program For Minnesota Muskrat, Paul R. Highby
Journal of the Minnesota Academy of Science
No abstract provided.
Notes On Minnesota Ticks, William A. Riley
Notes On Minnesota Ticks, William A. Riley
Journal of the Minnesota Academy of Science
No abstract provided.
Kentucky Warbler (Vol. 17, No. 2), Kentucky Library Research Collections
Kentucky Warbler (Vol. 17, No. 2), Kentucky Library Research Collections
The Kentucky Warbler
No abstract provided.
Block And Bridle Annual 1941
Block and Bridle Annual (1933–2021)
The objectives of the Block and Bridle Club of Nebraska may be stated in a few words. They are, to foster an interest in the livestock industry, and to advertise that industry through favorable publicity; to prepare outstanding students of today for leadership tomorrow; to provide a means by which to congenial group of young men may meet and benefit each from the association of the others; and to participate in activities of the Campus so that the entire student body may profit not only in money but in useful things accomplished.
The Darters (Etheostominae) Of Minnesota, Kenneth D. Carlander
The Darters (Etheostominae) Of Minnesota, Kenneth D. Carlander
Journal of the Minnesota Academy of Science
No abstract provided.
The Relation Of Temperature And Snow Cover To Spring Bird Arrival, Ewart Grove
The Relation Of Temperature And Snow Cover To Spring Bird Arrival, Ewart Grove
Journal of the Minnesota Academy of Science
No abstract provided.