Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- Utah State University (2708)
- TÜBİTAK (1669)
- Morehead State University (1585)
- Washington University in St. Louis (1122)
- Marquette University (1009)
-
- University of Nebraska - Lincoln (932)
- University of New Mexico (792)
- University of South Carolina (720)
- California Polytechnic State University, San Luis Obispo (714)
- Portland State University (679)
- University of Texas Rio Grande Valley (611)
- University of Montana (602)
- City University of New York (CUNY) (570)
- Nova Southeastern University (558)
- Brigham Young University (549)
- Old Dominion University (525)
- Eastern Illinois University (506)
- The Texas Medical Center Library (501)
- Wright State University (467)
- Western Kentucky University (434)
- Loyola University Chicago (414)
- University of Richmond (400)
- Missouri University of Science and Technology (392)
- Boise State University (387)
- University of Kentucky (387)
- University of Central Florida (380)
- Montclair State University (369)
- University of South Florida (361)
- Smith College (338)
- Virginia Commonwealth University (322)
- Keyword
-
- Biology (1042)
- Animals (356)
- Ecology (356)
- Evolution (355)
- Climate change (331)
-
- Biological Sciences (297)
- Department of Biological Sciences (271)
- Conservation (257)
- Scanning electron microscopy (257)
- Cancer (256)
- Humans (243)
- Genetics (235)
- Bacteria (207)
- Mice (202)
- Biodiversity (200)
- Apoptosis (192)
- Metabolism (192)
- Gene expression (181)
- Behavior (174)
- Morphology (169)
- Fish (164)
- Phylogeny (163)
- Biological sciences (160)
- Genomics (160)
- Bioinformatics (159)
- Drosophila (159)
- Invasive species (156)
- Mitochondria (149)
- Development (143)
- Temperature (143)
- Publication Year
- Publication
-
- Turkish Journal of Biology (1669)
- Roger W. Barbour Slide Collection (1387)
- Biology Faculty Publications (1360)
- Biological Sciences Faculty Publications (1155)
- Scanning Microscopy (1089)
-
- Theses and Dissertations (868)
- Arts & Sciences Graduate Student Theses and Dissertations (834)
- Biological Sciences Faculty Research and Publications (749)
- Faculty Publications (745)
- Biology Faculty Publications and Presentations (656)
- School of Biological Sciences: Faculty Publications (649)
- Electronic Theses and Dissertations (645)
- Biology ETDs (639)
- Biological Sciences (624)
- Master's Theses (519)
- Honors Theses (498)
- Masters Theses (496)
- Biology Faculty Works (397)
- Biology Faculty Research (396)
- Biology (377)
- School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology) (368)
- Dissertations and Theses (366)
- Faculty, Staff and Students Publications (357)
- Faculty Research & Creative Activity (337)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (333)
- Biological Sciences: Faculty Publications (314)
- Scanning Electron Microscopy (289)
- Journal of Undergraduate Research (283)
- Dissertations (266)
- Karbala International Journal of Modern Science (255)
- Publication Type
Articles 38971 - 39000 of 39268
Full-Text Articles in Entire DC Network
A Study Of Fluctuations In Coyote Numbers And Possible Causes, Sherwin B. Griswold
A Study Of Fluctuations In Coyote Numbers And Possible Causes, Sherwin B. Griswold
Master's Theses or Doctor of Nursing Practice
This paper reports the findings of a study of coyote numbers, with particular reference to fluctuations, their periodicity, if any, and their possible causes. In order to answer these questions studies of bounty payments were made in four centrally located counties of Kansas. The counties selected for this study were Ellis, Russell, Edwards, and Harvey. The location of these counties is shown in figure I on page 5. A record of these bounty payments was secured by checking through the records in the office of the county clerk of these counties for all years in which records were on file.
The Identification Of Certain Fiber Plants Of The American Southwest, Carl J. King
The Identification Of Certain Fiber Plants Of The American Southwest, Carl J. King
Biology ETDs
In this study an examination has been made of the leaf fiber from various species of the genera Agave, Yucca, Nolina and Dasylirion, in order establish a technique and set of diagnostic characters which might be used in the identification of archaeological material suspected of containing such fibers.
The Differentiation Of Xylem Vessels In The Stem Tip Of Phaseolus Vulgaris L. Var. Kentucky Wonder, Lora Shields Mangum
The Differentiation Of Xylem Vessels In The Stem Tip Of Phaseolus Vulgaris L. Var. Kentucky Wonder, Lora Shields Mangum
Biology ETDs
The purpose of this investigation of xylem maturation was to determine the relationship, if any, between the type of secondary-wall thickening and the order of differentiation; also, to ascertain the influence of the rate of elongation of the plant as a whole, more specifically of individual xylem cells, upon the order of deposition and type of secondary walls.
A Study Of The Genus Penstemon In New Mexico, Gladys Turner Nisbet
A Study Of The Genus Penstemon In New Mexico, Gladys Turner Nisbet
Biology ETDs
The purpose of this study has been: (a) to present a systematic treatment of those members of the genus Penstemon that are found in New Mexico; (b) to give a full description of each species including a consideration of its relationships with other species of the genus; (c) to ascertain and map, in so far as possible, the distribution of the various species in New Mexico.
The Effects Of Deficiencies Of Copper, Iron And Zinc Upon Untreated And Rootone Treated Rye And Alfalfa, Archer P. Crosley Jr.
The Effects Of Deficiencies Of Copper, Iron And Zinc Upon Untreated And Rootone Treated Rye And Alfalfa, Archer P. Crosley Jr.
Biology Honors Papers
This 18 page thesis studies the effects of deficiencies in the ions of copper, iron and zinc upon untreated and Rootone treated rye and alfalfa plants.
The Effects Of The Deficiencies Of Boron, Phosphorus, And Manganese As Correlated With The Use Of A Growth-Substance, Nathaniel Winkelman Jr.
The Effects Of The Deficiencies Of Boron, Phosphorus, And Manganese As Correlated With The Use Of A Growth-Substance, Nathaniel Winkelman Jr.
Biology Honors Papers
This thesis discusses experiments on plant growth, including ion deficiencies and the effects of growth hormones.
Quantitative Effects Of Rootone On Stem And Root Growth In Zea Mays And The Effect Of Nutrient Salts On The Same, Roy Wenhold
Quantitative Effects Of Rootone On Stem And Root Growth In Zea Mays And The Effect Of Nutrient Salts On The Same, Roy Wenhold
Biology Honors Papers
This 22 page thesis examines the effect of Rootone growth hormone on the sweet corn plant.
The Histology Of The Duodenum Of Thamnopsis Sirtalis, Harvey William Lyon
The Histology Of The Duodenum Of Thamnopsis Sirtalis, Harvey William Lyon
Bachelors’ Theses
The problem directly concerned is the histological study of the duodenum In Thamnopsls sirtalls, the common green or garter snake. The gross anatomy has been worked out In Reptilian forms and shows great variations, whereas very little work has been performed in the histology of the digestive organs. Some study has been made In other Reptilian forms such as the lizzard family but the knowledge of their histological structure is limited. Therefore if the gross anatomy differs in various forms, so may the histology differ also. It is the problem then of this thesis to investigate this subject and determine …
An Experimental Attempt To Modify The Sex Ratio Of Drosophila Melanogaster, Herman Weingrod
An Experimental Attempt To Modify The Sex Ratio Of Drosophila Melanogaster, Herman Weingrod
Bachelors’ Theses
Sex control has been defined as the science of producing male or female offspring at will by artificial means. Because of the far reaching consequences of such a technique, man has always had a strong desire to control the sex of his offspring. The ancient Egyptians attempted it by means of magic, while the old Hebrew Talmud offered suggestions for its practice based on practical experience. The problem as such forms part of the folklore and superstition of many ancient races and peoples.
The Anatomy Of The Stem, Root And Leaf Of Dennstaedtia Cicutaria Moore, William J. Weishar
The Anatomy Of The Stem, Root And Leaf Of Dennstaedtia Cicutaria Moore, William J. Weishar
Bachelors’ Theses
The work in plant anatomy up to 1874 was brought together and added to by De Bary (1884) in his memorable work, the Comparative Anatomy of the Vegetative Organs of the Phanerogams and Ferns. Several years later, Van Tieghem (1886) presented the groundwork for the stelar theory to explain the fundamental structure of the stem and root axis of the plant. Since that time the anatomy of the Pteridophytes has been the object of Increased interest and study.
The Effect Of Organic And Inorganic Substances Upon The Enzymatic Activity Of Papain Using Gelatin As A Substrate, Raymond A. Sklencar
The Effect Of Organic And Inorganic Substances Upon The Enzymatic Activity Of Papain Using Gelatin As A Substrate, Raymond A. Sklencar
Bachelors’ Theses
In the science of enzymology many hitherto unknown facts have been discovered. Among these are the facts which show that certain substances or conditions will accelerate, inhibit, or poison an enzyme reaction. Thus, heavy metals, oxidizing agents, etc., will prevent the enzyme from working at a normal rate or even "kill" the enzyme completely. Again, certain materials or co-enzymes will speed up and increase the enzyme power of a substance.
A Study Of Origins And Ecological Features Of Hardy, Cultivated, Herbaceous Plants Of Milwaukee, Wisconsin, Dorothy Elaine Witheck
A Study Of Origins And Ecological Features Of Hardy, Cultivated, Herbaceous Plants Of Milwaukee, Wisconsin, Dorothy Elaine Witheck
Bachelors’ Theses
Gardeners have always been interested in herbaceous plants, chiefly because of their beauty and usefulness. As a result of the great popularity, a large number of attractive varieties have been produced through centuries of' cultivation, selection and breeding. Very early agricultural and medical demands stimulated an interest in the plants, and as early as 372-287 B.C. Theophrastus, a pupil of Aristotle, described about 460 cultivated plants and classified them as herbs, undershrubs, shrubs and trees. Much of the work accomplished by the ancient Greeks was lost and it was not until the sixteenth century that renewed enthusiasm for the study …
A Study Of The Anatomical Structure Of The 6mm Wall-Eyed Pike, Richard E. Roche
A Study Of The Anatomical Structure Of The 6mm Wall-Eyed Pike, Richard E. Roche
Bachelors’ Theses
The following is a detailed study of the 6 mm Wall-eyed Pike. The organs and organ systems are presented and discussed in the same serial order that they appear in the embryo beginning at the anterior end and proceeding posteriorly. There has apparently been very little work done on the embryology of the Wall-eyed Pile for the literature contains only one article that is even closely related to this problem. In 1890 Reighard made a general study of the development of the Wall-eyed Pike from the time of fertilization to the fully grown adult. He did not, however, make any …
Inbreeding And Selectional Studies Of Drosophila Melanogaster, Marian Cecilia Dellers
Inbreeding And Selectional Studies Of Drosophila Melanogaster, Marian Cecilia Dellers
Bachelors’ Theses
The eyeless gene of Drosophila, which causes in general a reduction of the size of the eye in the adult fly, does not seem to produce a constant effect. Thus among the offspring of one pair of flies many phenotypes will be found, flies with reduced eyes of various sizes and flies with one or both eyes completely missing. The purpose of this series of experiments was to investigate the genetical and environmental factors involved in the modification of the results produced by the eyeless gene and to determine their relative importance, especially through selective breeding in the direction of …
The Effect Of Sulfanilamide On The Spleen, Kidney, And Erythrocytes Of The Albino Rat, Paul M. Bergen
The Effect Of Sulfanilamide On The Spleen, Kidney, And Erythrocytes Of The Albino Rat, Paul M. Bergen
Bachelors’ Theses
Sulfanilamide today is recognized somewhat as a magical drug since it is being used in the cure of so many different diseases. Therefore it was my desire to experiment with it. The problem which the author has endeavored to solve has been, as the title implies, just what effect the drug has upon the blood, the cells of the spleen and the kidney. It has been my aim to verify or refute the findings of experimenters who have delved in the field previous to my experimentation, l and to attempt to give some explanation for the findings.
Colorless Fuchsin: A Staining Technique For The Salivary Gland Chromosomes Of Drosophila Melanogaster, Gordon I. Koehler
Colorless Fuchsin: A Staining Technique For The Salivary Gland Chromosomes Of Drosophila Melanogaster, Gordon I. Koehler
Bachelors’ Theses
The chromosome theory of heredity opened a large field for both cytologists and geneticists. They looked to the day when someone would find an organism in which the chromosomes were so large that it would be possible to see Qualitative differences along their length corresponding to the different genes which they knew must be present at these points. Before 1932, methods and materials to show these chromosomes to any appreciable extent had, however, not yet been devised. Competent observers using the finest of optical equipment, and the most refined techniques of staining could see little at the time of nuclear …
Culture Media For Drosophila, Joseph L. Himmelreich
Culture Media For Drosophila, Joseph L. Himmelreich
Bachelors’ Theses
In the work with Culture Media for Drosophila the author was interested in producing a medium that was not expensive, easy to prepare, and one that would produce mature and hardy flies.
Scientific Illustration, Alys Leontine D'Avesne
Scientific Illustration, Alys Leontine D'Avesne
Master's Theses
It may be somewhat difficult at first glance to understand the essential character of the relationship of art to science, and especially to the natural sciences. Without illustration it would be impossible either to learn or to teach these sciences . Drawings are needed in the classroom and in the laboratory to aid the teacher, and they are perhaps even more important in individual research where there is no teacher present to guide and to instruct the student .
Scientific illustration is not only an aid to teaching, it teaches by itself when properly executed. In cases where verbal description …
Some Aspects Of Evolutionary Theory, George M. Robertson
Some Aspects Of Evolutionary Theory, George M. Robertson
Fort Hays Studies Series
The present contribution is not a unified account, but is a series of essays dealing with some aspects, but is a series of essays dealing with some aspects of evolutionary theory.
The Effect Of Climate And Different Grazing And Dusting Intensities Upon The Yield Of The Short Grass Prairies In West Central Kansas, Marvin L. Lacey
The Effect Of Climate And Different Grazing And Dusting Intensities Upon The Yield Of The Short Grass Prairies In West Central Kansas, Marvin L. Lacey
Master's Theses or Doctor of Nursing Practice
The purpose of this problem was to determine the effect of climate, amount of dusting, and degree of grazing by livestock and grasshoppers upon the quantity and quality of forage produced by various short grass pastures in west-central Kansas.
The Incidence Of Trichinella Spiralis In The Diaphragms Of Swine From The Louisville Abattoirs., Stuart Lyle Adams
The Incidence Of Trichinella Spiralis In The Diaphragms Of Swine From The Louisville Abattoirs., Stuart Lyle Adams
Electronic Theses and Dissertations
Trichinosis is a disease caused by the parasitic nematode Trichinella spiralis. When meat containing encysted larvae is consumed the cysts are dissolved by the action of the gastric juice in the stomach and the larvae migrate to the intestine where they mature, copulate and give birth to living young within a week of the original infection. The larvae enter the lymph spaces and are carried to the thoracic duct from which they reach the venous circulation and thence the arterial circulation by way of the heart and the pulmonary capillaries. From the arterial blood the larvae enter most of the …
Activity Of Papain On Gelatin Mixtures, Edward J. Ruschmann
Activity Of Papain On Gelatin Mixtures, Edward J. Ruschmann
Bachelors’ Theses
Within the Marquette chemical laboratories under the direction and supervision of Dr. John R. Koch, professor and head of the Chemistry Department, many noteworthy advances in enzyme chemistry have been achieved. A new type all glass, single unit viscometer was developed and perfected by Koch and now is the basis of the study of enzyme activity by viscometric methods. The use of this viscometer is not limited solely to work in these laboratories but has also been used with great success in bating and brewing.
Utilization Of Peptones And Peptone Fractions By Bacteria, Margaret E. Mcmaster
Utilization Of Peptones And Peptone Fractions By Bacteria, Margaret E. Mcmaster
Open Access Master's Theses (through 2010)
An attempt was made to determine the minimum concentration of the different peptones which are necessary to support the growth of a group of aerobic microorganisms. The medium for this experiment was semi-solid glucose peptone agar, with the peptone being varied in amount and kind.
- The growth supporting properties of the peptones under investigation varied a great deal.
- The minimum concentration of peptone necessary for the growth of Shigella dysenteriae, Proteus vulgaris, Streptococcus lactis, and Salmonella pullorum was determined.
- Peptones appear to contain a substance which is toxic to Salmonella pullorum or else they lack a growth …
The Early Basis Of Subsistence Of Indians In The Plains Area, Joe D. Reed
The Early Basis Of Subsistence Of Indians In The Plains Area, Joe D. Reed
Biology ETDs
The fundamental purpose of this paper is to present the picture of early food economy among the Indians of the Plains. In order to accomplish this task the procedure has been to present: (1) a brief study of the tribal groups with special emphasis upon their early history and movements, followed by (2) a general picture of Plains food economy with regard to the sequence and tribal units. The important subjects within this second category have to do with buffalo utilization, agriculture and the gathering to wild plant food; (3) a listing of the various wild plant and animal foods …
The Life History Of Side-Oats Grama Grass And Variations In Its Growth At Hays, Kansas, When Grown From Seed Produced In Different Parts Of The Great Plains Region, Harold Hopkins
Master's Theses or Doctor of Nursing Practice
This study, which covered a period of two years, was originated in order to learn more of the merits and faults of side-oats grama grass as a revegetation and soil conservation plant in the Great Plains Region. It was suggested by the fact that there is a definite need for more knowledge about the native grasses which are potential revegetation plants of the Great Plains. An attempt was made to find as many growth habits of the species as possible, and a comparison was made in the growth, development, and forage production of plants grown from seed produced in different …
The Economic And Physiological Significance Of The Effect Of Rootone On Dutch White Clover, Mary Alice Lord
The Economic And Physiological Significance Of The Effect Of Rootone On Dutch White Clover, Mary Alice Lord
Biology Honors Papers
This 35 page thesis examines the effect of the synthetic growth hormone Rootone on the Dutch White Clover plant.
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 Effects On Rye And Alfalfa Of Magnesium, Calcium, And Potassium Deficiencies In Regard To The Presence Or Absence Of Rootone, Alice Glancy
Biology Honors Papers
This 12 page thesis outlines an experiment to correlate possible relationships between magnesium, calcium, and potassium and the commercial plant hormone mixture Rootone.
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.
Fetal Ossification And Staining In The Chick Embryo, Felix E. Karpinski Jr.
Fetal Ossification And Staining In The Chick Embryo, Felix E. Karpinski Jr.
Biology Honors Papers
This 32 page thesis examines fetal ossification and staining in the chick embryo, including development, incubation, formation of the mesoderm and skeleton and methods for removal and fixation.