Life Sciences Commons^™

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

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.

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

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 …

Study Of The Aquatic And Semiaquatic Coleoptera In The State Of Utah, Harry P. Chandler

Theses and Dissertations

The purpose of this paper is to discover and make known the species of aquatic and semiaquatic Coleopters of the sub-order ADEPHAGA which occur in Utah and to give something of their distribution, environment and habits whenever possible. When ever possible the original description or a description from a recent revision has been included for each species. Descriptions given in recent revisions have been regarded as more desirable because they describe the species in comparison with its nearest relatives, while many fo the original descriptions were very incomplete and could not be used to separate many of our present species …

A Study Of The Physiology Of Grape Roots And Stocks In Relation To A Lime-Induced Chlorosis, Eldrow Reeve

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The word chlorosis comes from the Greek "chloros" meaning light green and is used by plant science workers to designate a disease of plants, the characteristic symptom of which is the yellowing of the leaves.

Sampling Studies In Morning Glory Roots, Lowell W. Rasmussen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Farmers and agriculturalists have in recent years become more conscious of the seriousness of the weed problems. The solution of this problem is obviously the development of more efficient and less costly methods of eradication. Most pernicious weeds are propagated vegetatively by means of underground parts in which reserve food is stored as a source of energy in tiding the plant over winter and initiating spring growth each year. In order to get at the behavior of these perennial parts, it is necessary to resort to a study of root reserves. This involves information not only on the composition of …

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.

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

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.

Viola Sororia Willd., John Mccree

Specimens by Name

No abstract provided.

Front Matter

Journal of the Minnesota Academy of Science

No abstract provided.

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

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

Journal of the Minnesota Academy of Science

No abstract provided.

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

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

Journal of the Minnesota Academy of Science

No abstract provided.

Notes On Minnesota Ticks, William A. Riley

Journal of the Minnesota Academy of Science

No abstract provided.

Notes On The Cave Bats Of Minnesota, G. N. Rysgaard

Journal of the Minnesota Academy of Science

No abstract provided.

Abstract Papers

Journal of the Minnesota Academy of Science

No abstract provided.

Back Matter

Journal of the Minnesota Academy of Science

No abstract provided.

North And South Dakota Horticulture, April 1941, North And South Dakota State Horticultural Societies

North and South Dakota Horticulture

Volume 14, Number 4

The Duck Hawk, O.A. Stevens
Newslants, H.A. Graves
S.D. Trees, E.H. Everson
Manitoba News Letter, W.R. Leslie
Presidents Corner, H.E. Beebe
April Notes, W.E.H. Porter
Fruits & Vegetable Notes, F.X. Wallner
Secretary's Corner, W.A. Simmons
Questions & Answers, L.L. Davis
Book Reviews, W.A. Simmons

Bulletin No. 296 - Uton: A New High-Yield White Oat Resistant To Loose And Covered Smuts, D. C. Tingey, R. W. Woodward, T. R. Stanton

UAES Bulletins

Oats have been among the five or six leading crops in acreage grown in Utah since its settlement. For many years Swedish Select has been by far the most predominant variety. This variety is well adapted to Utah conditions, but because of its high susceptibility to loose and covered smut, it is not the most desirable.

In 1934, after extensive trials, the variety, Markton, which is resistant to loose and covered smuts, was introduced into the state to replace Swedish Select. In those trials, Markton averaged 13 percent higher in acre yield than Swedish Select. Markton possessed one drawback in …

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.

Control Of The Chinch Bug In Nebraska, M. H. Swenk, H. D. Tate

Nebraska Agricultural Experiment Station: Historical Circulars

The chinch bug, Blissus leucopterus (Say), is one of the most injurious insect pests of cereal crops in the United States. Although some damage by it has occurred over a wide area in the United States, the greatest injury has been in the Corn Belt. The years in which the chinch bug appears in destructive abundance come irregularly in cycles of varying duration, and the length of these cycles is largely controlled by the direct or indirect effects of weather upon the bugs. Continued dry weather favors them, while very wet weather brings about their destruction. During the last seven …

Letters Between Phil F. Theurer And W. T. Johnson, Phil F. Theurer, W. T. Johnson

Documents

Theurer thanked Johnson for his purchase and informed him of a charge on his account.

The Interaction Of Certain Genes In Bristle Development Of Drosophila Melanogaster, Ray C. Anderson

Journal of the Minnesota Academy of Science

No abstract provided.

The Darters (Etheostominae) Of Minnesota, Kenneth D. Carlander

Journal of the Minnesota Academy of Science

No abstract provided.