Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Life Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 47911 - 47940 of 49531

Full-Text Articles in Entire DC Network

The Effect Of The Nitrogen Fixation And Of Aeration Upon The Growth Of Yeast In Culture Media, Syrene C. Bernstein May 1934

The Effect Of The Nitrogen Fixation And Of Aeration Upon The Growth Of Yeast In Culture Media, Syrene C. Bernstein

Bachelors’ Theses

The subject of yeast has been widely studied from many viewpoints; we can find many bacteriological, physiological, and chemical papers on the subject. Besides the purely scientific work on yeast, there are numerous industrial investigations on this subject, since yeast growth and the products of yeast growth form the foundation for such important industries as the distilling, brewing, baking industries as well as commercial yeast manufacture. The effect of nitrogen fixation has been treated from all of these angles, scientific and industrial, and the investigations include the form in which the nitrogen is most easily assimilated, the manner of the …


Type Collection Of The Writings Of Robert T. Hill, Ellis W. Shuler Apr 1934

Type Collection Of The Writings Of Robert T. Hill, Ellis W. Shuler

Field and Laboratory

Dr. Robert T. Hill has signally honored the Geological Department of Southern Methodist University by donating to its library the type collection of his writings with an index and annotated bibliography. This collection covers the writings of one of America's leading geologists over a period of nearly half a century. Interesting and valuable in every phase of geology, it is the court of final reference for the student of the history of Texas stratigraphy.


Forty-Seventh Annual Report Of The Agricultural Experiment Station Of Nebraska February 1, 1934, W.W. Burr Jan 1934

Forty-Seventh Annual Report Of The Agricultural Experiment Station Of Nebraska February 1, 1934, W.W. Burr

Agricultural Research Division: News and Annual Reports

This report is for the most part a record of the achievements of the Nebraska Agricultural Experiment Station during the fiscal year ending June 30, 1933. The reports from the substations extend to January 1, 1934. A financial statement showing the receipts and expenditures of the Experiment Station is included.

The projects are grouped and discussed under subject headings. Little or no progress has been made on some projects, while others, on which attention has been concentrated, have been advanced rapidly or completed. Curtailment of appropriations and a reduction in cash funds due to the low prices of agricultural products …


Whole Issue Nebraska Bird Review (October 1933) 1(4) Oct 1933

Whole Issue Nebraska Bird Review (October 1933) 1(4)

Nebraska Bird Review

Contents

The Present Status of the Whooping Crane. By Myron H. Swenk ................................. 111

General Notes .................................... 130

Editorial Page ........................................... 136

The 1933 Migration Season ................................ 137

Here and There with the N. O. U. Members: ............... 141

A Brief Synopsis of the Birds of Nebraska. II. Grebes (Colymbidae) .............................. 142

Index .................................................. 152

Advertisement .......................................... 159

Past N. O. U. Officers Other than President ................ 160


Farm Mortgage History Of Eleven Southeastern Nebraska Townships 1870-1932, Eleanor H. Hinman, J. O. Rankin Aug 1933

Farm Mortgage History Of Eleven Southeastern Nebraska Townships 1870-1932, Eleanor H. Hinman, J. O. Rankin

Nebraska Agricultural Experiment Station: Historical Research Bulletins

It is believed that a study of a complete record of all farm mortgages for a typical although very limited Nebraska farming area from 1870 through 1932 may be of interest (1) as a sample of the farm mortgage history of the western part of the corn belt, (2) as a contribution to analyzing some of the sources of agricultural credit and the use made of them, (3) as an illustration of the relation of farm mortgages to land and commodity prices, farm income, and banking resources, and (4) as an example of the mortgage problems of corn belt farmers …


A Study Of The Plant Ecology Of Salt Lake And Utah Valleys Before The Mormon Immigration, John Homer Wakefield May 1933

A Study Of The Plant Ecology Of Salt Lake And Utah Valleys Before The Mormon Immigration, John Homer Wakefield

Theses and Dissertations

This study is an attempt to bring together such available material , heretofore not collected, into a single compilation pertaining to the plant associations of Utah and Salt Lake Valleys. An endeavor is made to build a picture of the vegetation as it was before the pioneers entered these valleys as compared with what it is today. The material compiled here is the result of searching through all available sources such as government reports of geological explorations, private diaries of explorers and pioneers , contemporary magazines, books and newspapers .


Bird Studies Of The Bear River Marshes, Ernest W. Parkinson May 1933

Bird Studies Of The Bear River Marshes, Ernest W. Parkinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The establishment of the Bear River Bay Bird Refuge has created for the state of Utah an immense and valuable biological field, a veritable paradise for naturalist and sportsman alike. The naturalist wants a place to study wild life and the sportsman desires game. With the proper control of open seasons on wild fowl the hunting instinct and incentive for the sport should be satisfied for the sportsman. To the naturalist this region will open up bountiful treasures of knowledge that is to be gained only by intense and prolonged scientific study.

Within this new field, and the limited time …


Forty-Seventh Annual Meeting Of The Iowa Academy Of Science And The Second Annual Convention Of The Junior Academy Of Science Of Iowa, April 21 And 22, 1933, Iowa Academy Of Science Apr 1933

Forty-Seventh Annual Meeting Of The Iowa Academy Of Science And The Second Annual Convention Of The Junior Academy Of Science Of Iowa, April 21 And 22, 1933, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.


A Comparison Of Commercial And Crude Samples Of Sodium Chloride, Jean Horace Sullivan Apr 1933

A Comparison Of Commercial And Crude Samples Of Sodium Chloride, Jean Horace Sullivan

Field and Laboratory

The object of the experiment was to compare the relative purity of several brands of table salt with crude sodium chloride as it comes from the mines. The comparison was made by a gravimetric determination of the chlorine as silver chloride. Two commercial samples obtained from the local stores were compared with a crude sample from Jefferson Island mine.


Notes, Corrections, Alumnae Notes Apr 1933

Notes, Corrections, Alumnae Notes

Field and Laboratory

No abstract provided.


Whole Issue Nebraska Bird Review (April 1933) 1(2) Apr 1933

Whole Issue Nebraska Bird Review (April 1933) 1(2)

Nebraska Bird Review

Contents

A Comparison of the Bird Faunas of the Pampas of Argentina and the Plains of Nebraska. By Lawrence Bruner . . . . . . . . . . . . . . . . . . 27

General Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... 29

Editorial Page........................................... 36

The 1933 Migration Season ................................ 38

Here and There with the N. O. U. …


Annual Report: 1933 Jan 1933

Annual Report: 1933

Cherry County (Nebraska) Extension: Historical Documents

General Activities

Building Extension Program

Cereals

Legumes and Forage Crops

Potatoes, Cotton, Tobacco, and other Special Crops

Fruits, Vegetables, and Beautification of Home Grounds

Forestry and Agricultural Engineering

Poultry and Bees

Dairy Cattle, Beef Cattle, Sheep, Swine, and Horses

Agricultural Economics

Foods and Nutrition

Child Development and Parent Education

Clothing

Home Management and House Furnishings

Home Health and Sanitation

Community or Country-Life Activities

Other Activities


Whole Issue Nebraska Bird Review (January 1933) 1(1),. Copyright 1933, Nebraska Ornithologists' Union. Used By Permission. Jan 1933

Whole Issue Nebraska Bird Review (January 1933) 1(1),. Copyright 1933, Nebraska Ornithologists' Union. Used By Permission.

Nebraska Bird Review

Contents

Observations on the Number of Birds to the Square Mile in Custer County. By J. M. Bates. . . . . . . . . . . . . . . . . . . . . .. 3

General Notes . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 5

Editorial Page..................... . . . . . . . . . . . . . . …


Equipping A Vitamin Laboratory On Depression Funds, May L. Whitsitt Nov 1932

Equipping A Vitamin Laboratory On Depression Funds, May L. Whitsitt

Field and Laboratory

The spending of a sum of money for research purposes in days of decreased and declining income takes on the air of a real adventure. When given the opportunity of undertaking a research problem in the field of vitamin investigation the writer eagerly set out to see how far funds could be extended.


Bulletin No. 242 - Drainage Of Land Overlying An Artesian Ground-Water Reservoir: Progress Report, O. W. Israelsen, W. W. Mclaughlin Nov 1932

Bulletin No. 242 - Drainage Of Land Overlying An Artesian Ground-Water Reservoir: Progress Report, O. W. Israelsen, W. W. Mclaughlin

UAES Bulletins

Certain tracts of land in the West formerly used to produce grain and forage crops now produce only pasture grasses of comparatively low quality because of the water-logging and alkali accumulation which has occurred since irrigation was begun. Other tracts now producing only light crops of wild hay probably would produce profitable crops of alfalfa and clover, provided the water-table were lowered and the water-logged and alkaline condition of the soil removed. Still other areas are almost wholly nonproductive because of the concentration of excessive quantities of harmful alkali salts.

Knowledge concerning (1) the causes of water-logging, (2) economical methods …


The Vitamin A And The Vitamin E Content Of Field-Cured And Artificially Cured Alfalfa Hay, I. L. Hathaway, H. P. Davis, R. R. Graves Oct 1932

The Vitamin A And The Vitamin E Content Of Field-Cured And Artificially Cured Alfalfa Hay, I. L. Hathaway, H. P. Davis, R. R. Graves

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A comparative study of the vitamin A content of field-cured and artificially cured alfalfa was made by comparing the growth produced by 124 rats receiving alfalfa hay as their source of vitamin A. From the results of this study, in which the experiments were duplicated, it is concluded that under the conditions of these experiments the artificially cured alfalfa was twice as potent in vitamin A as was the field-cured alfalfa. The comparative study of the vitamin E content of these hays was made by comparing the number of litters produced by groups of female rats which received graded quantities …


Bulletin No. 235 - Biennial Report, Utah Agricultural Experiment Station: July 1, 1930 To June 30, 1932, P. V. Cardon Aug 1932

Bulletin No. 235 - Biennial Report, Utah Agricultural Experiment Station: July 1, 1930 To June 30, 1932, P. V. Cardon

UAES Bulletins

President E. G. Peterson

Sir: I have the honor to transmit the report of the Utah Agricultural Experiment Station for the biennium ending June 30, 1932. This report includes the reports of the various departments as well as other information pertaining to the work of the Experiment Station during this two-year period.

Respectfully submitted, P. V. CARDON, Director.


Circular No. 99 - Utah Snow Sampler And Scales For Measuring Water Content Of Snow, George D. Clyde Jun 1932

Circular No. 99 - Utah Snow Sampler And Scales For Measuring Water Content Of Snow, George D. Clyde

UAES Circulars

Snow survey are usually conducted in uninhabited and mountainous areas, The surveyor must travel on snowshoes or skiis; therefore the necessary equipment must be light, strong, and compact.


A Morphological And Systematical Study Of The Genus Brachinus Of The United States, Almon L.D. Brown May 1932

A Morphological And Systematical Study Of The Genus Brachinus Of The United States, Almon L.D. Brown

Theses and Dissertations

The genus Brachinus belongs to the well-known family Carabidae, commonly known as "Ground Beetles". About 15,000 species of Carabidae have been described, of which over 100 genera and 1,200 species occur in the United States. (Dodd Mead 1928).


The Transportation Of Wood In Chutes, Alexander M. Koroleff, Ralph Clement Bryant Jan 1932

The Transportation Of Wood In Chutes, Alexander M. Koroleff, Ralph Clement Bryant

Yale School of the Environment Bulletin Series

Artificial channels, known as chutes, in which logs and bolts may be transported down steep slopes by means of gravity, were devised several centuries ago in the mountainous regions of Europe and later were used by north American loggers, especially in New England, New York, and Pennsylvania. They operate most advantageously on grades that are far in excess of those on which wheeled vehicles or sleds can be used safely, and they are most serviceable for moving timber on terrain which is so steep or broken that the construction cost of suitable roads is prohibitive.


Forty-Fifth Annual Report Of The Agricultural Experiment Station Of Nebraska, February 1, 1932, W.W. Burr Jan 1932

Forty-Fifth Annual Report Of The Agricultural Experiment Station Of Nebraska, February 1, 1932, W.W. Burr

Agricultural Research Division: News and Annual Reports

This report covers the investigations, expenditures, and publications of the Nebraska Agricultural Experiment Station for the fiscal year June 30, 1931. During the year 68 projects have been under investigation at the main station. These have covered a wide range of subjects. At the various substations the work is planned to meet the needs of the different regions.

The funds for carrying on the work of the stations are derived from federal and state sources. The work is carried on in definite projects according to the supporting fund.

Satisfactory progress was made on the research program. During the year eight …


Ec32-713 The Trench Silo In Nebraska, Ivan D. Wood, E.B. Lewis Jan 1932

Ec32-713 The Trench Silo In Nebraska, Ivan D. Wood, E.B. Lewis

University of Nebraska-Lincoln Extension: Historical Materials

The original idea of using a trench for the storing of ensilage seems to have been the outgrowth of the practice long used in several European countries of storing clover and beet tops in pits. Shortly after the World War, western Canada followed by Montana and North Dakota began to use the trench silo. In Nebraska the true trench silo made its appearance about 1925 or 1926.

The trench silo as described in this circular, unless lined with some permanent material such as brick, concrete or stone, must be considered a temporary structure which will serve for a few years …


Rb32-266 Cooling Milk On Nebraska Farms, P.A. Downs, E.B. Lewis Jan 1932

Rb32-266 Cooling Milk On Nebraska Farms, P.A. Downs, E.B. Lewis

University of Nebraska-Lincoln Extension: Historical Materials

The desire of Nebraska people to continue the improvement of living conditions and to secure more healthful foods has been responsible for many changes in methods of caring for milk. One of the important factors in keeping milk sweet and of good quality is the process of cooling and keeping it cool until used. Three of these processes are as follows: placing containers of warm milk in any quantity of still water or still air at temperatures ranging from freezing to within a few degrees of the temperature of the milk, placing the containers in such positions that air or …


Studies Of Rickets In Swine, William J. Loeffel, Ray R. Thalman, F. C. Olson, F. A. Olson Aug 1931

Studies Of Rickets In Swine, William J. Loeffel, Ray R. Thalman, F. C. Olson, F. A. Olson

Nebraska Agricultural Experiment Station: Historical Research Bulletins

During the years 1925 to 1929 inclusive, the Nebraska Agricultural Experiment Station carried on a series of four experiments to study the importance of the antirachitic factors in the nutrition of swine. Vitamin D as obtained from cod-liver oil and the radiant-energy factor of sunlight were the sources of the antirachitic factors that received primary consideration. Emphasis was placed upon the study of the symptoms and lesions produced in pigs fed a rickets-producing ration.


Circular No. 95 - Annual Summary Of Publications, Blanche Condit Pittman Jul 1931

Circular No. 95 - Annual Summary Of Publications, Blanche Condit Pittman

UAES Circulars

Circular No. 95 contains a summary of publications issued by the Utah Agricultural Experiment Station, through its Editorial and Publications Division, for the fiscal year ending June 30, 1931.


Iowa Academy Of Science, Jacob W. Swisher Jul 1931

Iowa Academy Of Science, Jacob W. Swisher

Iowa Academy of Science Documents

Reprinted from the July 1931 issue of the Iowa Journal of History and Politics published by the State Historical Society of Iowa,


Utilization Of Proteins By The Growing Chick, F. E. Mussehl, C. W. Ackerson May 1931

Utilization Of Proteins By The Growing Chick, F. E. Mussehl, C. W. Ackerson

Nebraska Agricultural Experiment Station: Historical Research Bulletins

1. There is a marked difference in the nutritive value of the various protein-contributing concentrates when used to supplement a corn-wheat basal ration which has been made complete for known vitamin and mineral essentials. 2. There is a great difference in the biological value even of animal protein concentrates. 3. Soybean meal produced a better growth rate than any of the other plant concentrates used. Cottonseed meal proved to have a greater growth-promoting value than did linseed oil meal. 4. The supplementing values of protein concentrates, one to another, is not quite as evident as one would expect if the …


Bulletin No. 224 - Muck Soil Investigations: Progress Report, Sanpete County Experimental Farm 1927-30, Inclusive, Le Moyne Wilson, George Stewart Apr 1931

Bulletin No. 224 - Muck Soil Investigations: Progress Report, Sanpete County Experimental Farm 1927-30, Inclusive, Le Moyne Wilson, George Stewart

UAES Bulletins

The estimated area of muck or peat soil in Utah is approximately 21,000 acres. The muck occurs in many valleys of Utah. The largest areas are in the Sanpete and Utah Lake Valleys. The area in the former is estimated at 6500 acres and the Utah Valley area at 9000 acres; the other areas, all more or less significant in size, are scattered throughout the state.

Investigations reported have been confined entirely to the Sanpete area which is located near the south and bottom end of the valley and is west of the towns of Chester, Ephraim, and Manti. During …


Circular No. 93 - Better Sugar-Beet Culture For Utah, George Stewart, D. W. Pittman Apr 1931

Circular No. 93 - Better Sugar-Beet Culture For Utah, George Stewart, D. W. Pittman

UAES Circulars

Utah was one of the first states to begin sugar-beet growing. The industry grew rapidly, favored by the climate, by the naturally productive soils, by the freedom from pests, and by the system of intensive irrigation agriculture. California and Utah were among the leading beet-producing states at the time of the World War, and under the stimulus of high prices they remained so until the great depression of 1920. After that, the frequent occurrence of curly-top and the rapid spread of nematode, together with the low price resulting from increased cane sugar production in the tropics and from other causes …


Bulletin No. 225 - Progress Report: Carbon County Experimental Farm, 1927-30, Inclusive, I. D. Zobell, George Stewart Apr 1931

Bulletin No. 225 - Progress Report: Carbon County Experimental Farm, 1927-30, Inclusive, I. D. Zobell, George Stewart

UAES Bulletins

The agricultural problems of the Carbon County Experimental Farm and of the locality which it serves are distinctly different from those of most of the farming localities of Utah. The low and uncertain winter rainfall, the comparative "rawness" of the soils, together with their almost infinite stickiness when wet, and the presence of considerable alkali throughout their body makes them peculiarly sensitive to time and manner of treatment and causes them to absorb water slowly and to erode readily.