Life Sciences Commons^™

New Skipper Records For Mexico (Lepidoptera, Rhopalocera, Hesperiidae), H. A. Freeman

Field and Laboratory

No abstract provided.

Agricultural Research In South Dakota: Sixty-Fourth Annual Station Report, July 1, 1950 - June 30, 1951, South Dakota State College Of Agriculture And Mechanic Arts

Agricultural Experiment Station and Research Farm Annual Reports

No abstract provided.

Block And Bridle Annual, 1951

Block and Bridle Annual (1933–2021)

Table of Contents:

Roster of Members Chronicle of Activities Financial statement Sample Minutes of Regular Meeting Initiation Activities Jr. Ak-Sar-Ben Ball and Livestock Show Honors Banquet Student Livestock Judging Contest Judging Teams Recognition National Merit Trophy Award

A Study Of Bovine Noseprints, Morris W. Hirsch

Electronic Theses and Dissertations

The breed association are continuously confronted with the problem of properly identifying animals for registration. The method of identifying the broken color breeds, such as Guernseys, Holsteins, and Ayrshires, is by a sketch of the color patterns which accompanies the application for registration. This has been fairly successful, but due to the poor drawing ability of the applicant approximately twenty percent of animal markings and sketch do not resemble each other to establish identity. The solid colored breeds use brands or tattoo marks in the ear which are not entirely satisfactory since these are artificial and can be applied in …

The Affect Of Indole-3-Acetic Acid On The Fission Rate Of Paramecium Caudatum, Margherita L. Baker

Student Scholarship

This research report, authored by Margherita L. Baker in 1951, investigates the physiological effects of the plant growth hormone indole-3-acetic acid, also known as heteroauxin, on the fission rate of the protozoan Paramecium caudatum. The study is grounded in the hypothesis that if plant hormones can influence animal growth, it suggests a fundamental similarity in the growth mechanisms between the two kingdoms. The experimental procedure was divided into two distinct series to observe how varying environmental conditions and food availability influenced the hormonal impact. 

In the first series, paramecia were maintained in a nutrient-rich beef extract medium with an abundant …

The Bionomics Of The Culicidae Of The Dallas Area, Ottis L. Mccleskey

Field and Laboratory

Little work has been done on Texan mosquitoes. In 1922 Dyar listed 43 species from Texas, 10 of which were recorded from near Dallas. Cushing (1934) listed the mosquitoes of Brazos County. McGregor & Eads (1934) in their work on the mosquitoes of Texas, divided the State into 17 approximately equal areas. They gave a total list of 54 species, of which 19 were reported from the area that included Dallas County. Fisk & LeVan (1941) published notes on the mosquitoes of Brownsville. The State Health Department of Texas published (1944) a booklet, "The Mosquitoes of Texas", which is the …

Distributional Notes On The Theclinae Of Arkansas, H. A. Freeman

Field and Laboratory

During the past 24 years I have collected rather thoroughly over the state of Arkansas, and found 12 species of hairstreaks in four genera represented there. Their local habits show that they are most likely indigenous. All of the present information is first-hand, except that on Incisalia irus (Godart), which was furnished by Mr. Paul McHenry of El Dorado, Ark.

Early Release From Aspen Improves Yield Of Pine Plantations, E.I. Roe

Aspen Bibliography

No abstract provided.

The Sedimentation Rate Of Potato Yellow-Dwarf Virus, M. K. Brakke, L. M. Black, Ralph W. G. Wyckoff

Department of Plant Pathology: Faculty Publications

BLACK et al. (1948) have published electron micrographs of bodies believed to represent the New York variety of potato yellow-dwarf virus (Aureogenus vastans (H) Black) (Holmes 1948). The photographs showed bodies in several different extracts of infected plants of Nicotiana rustica L., but not in corresponding preparations from healthy plants. Similar bodies were found in concentrates from plants infected with the New Jersey variety of the virus (var. agalliae Black). These bodies were larger than, and of a different character from, those of plant viruses hitherto examined in the electron microscope. The present study was undertaken to obtain evidence …

Enemies Of Aspen, Clyde M. Christensen, Ralph L. Anderson, A. C. Hodson, Paul O. Rudolf

Aspen Bibliography

So long as aspen was considered primarily a weed species, there was little concern over the enemies which might injure or destroy it. Sometimes these enemies were actually considered "blessings in disguise. Now, however, that aspen not only is the most abundant "but also one of the most widely utilized tree species in the Lake States, there is increasing interest in anything that may affect its future supply. For that reason this brief summary of information on the enemies of aspen has been assembled.

Final Report On Sanitation And Fertilization Tests In Aspen Stands On Bright Angel Point, Grand Canyon National Park, Stuart R. Andrews

Aspen Bibliography

No abstract provided.

Vocational Agri. Department, Colored High School, Williamston, North Carolina, Shop Program, Veterans Farm Training, Vocational Agriculture Department, Williamston Colored High School

Documents

Shop program for veterans' farm training.

The Spotlight, Volume Ii, Number 1, Unity High School

Documents

Newsletter of the Agriculture Department at Unity High School.

Ffa Awards And Annual Program Of Work In Vocational Agriculture Bias Group, North Carolina Agricultural & Technical State University

Documents

FFA awards and the annual Program of Work in Vocational Agriculture.

Studies Of Vetch Anthracnoses., Norman Louis Horn

LSU Historical Dissertations and Theses

No abstract provided.

Mammals Of The Mexican State Of San Luis Potosi., Walter Woelber Dalquest

LSU Historical Dissertations and Theses

No abstract provided.

Research In Agriculture 1949-1950: Annual Report., W G. Taggart

LSU Agricultural Experiment Station Reports

No abstract provided.

Biotic Interrelationships Of Helminth Parasitism, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Biotic interrelationships in Alaska have so far suffered little from man's attempts to improve upon nature. As a result of these favorable circumstances, biological investigation in Alaska offers unusual opportunity for elucidating problems which can no longer be approached in the more populated parts of North America. One is very fortunate to have the opportunity of working under these conditions, since present trends indicate that Alaska is soon to go by the way of the great wildernesses which once existed in the United States and Canada.

The Acanthocephalan Parasites Of Eider Ducks, Harley J. Van Cleave, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Because of their wide geographical distribution through arctic and subarctic regions of the northern hemisphere, the eider ducks offer some unusual opportunities for the study .of distribution and hostrelations of their parasites. When the Acanthocephala from eider ducks were first studied, the fauna of each continent was regarded as distinct, because it had been reasonably well established that the majority of species of these parasites encounter~d in the United States were distinct from those found in central Europe. This belief failed to take into account the fact that in the arctic the usual distributional bartl:ers to both the definitive and …

Objectives, Goals, Ways And Means For In-School Groups, Pleasant Grove High School

Documents

Objectives, Goals, Ways and Means for In-School Groups at Pleasant Grove High School. NFA plans mentioned on pages 2-4.

The Status Of Beavers In The Delta Area Of The San Joaquin River, San Joaquin County, California, 1950-1951, Delbert David Cram

University of the Pacific Theses and Dissertations

The term “delta area” refers to a region roughly 40 miles long and 15 miles wide situated 65 miles east of San Francisco Bay where the San Joaquin and Sacramento Rivers join and enter Suisun Bay. The waterways in this area are fresh water from these rivers, but they are affected by the ocean tides and to some extent by the salinity of the ocean water. The rgeion ecompasses about 507,000 acres, most of which has been reclaimed for agricultural purposes by the construction of levees to contain the tides and high waters. The word “islands” is used locally to …

Studies On The Germination, Production, And Distribution Of Johnson Grass Seed In Certain Areas Of Louisiana., Ruth Patterson Phillips

LSU Historical Dissertations and Theses

No abstract provided.

Whole Issue Nebraska Bird Review (January 1951) 19(1)

Nebraska Bird Review

Table of Contents

Frontispiece

Ani· The Rare Tropical Bird, W. Le Roy Wilcox ....................... 1

Twenty.Five Year Summary of Bird Migration in Nebraska, Part 4, William F. Rapp Jr .......................... 3

General Notes ............................................................... 9

Announcements .....................................11

Pictorial Study of a Nesting Plover· Roy S. Wycoff, Lexington, Nebraska ................12

Obituary: Mrs. Louise Grier, L. O. Horsky .......................14

Book Reviews ........................14

Membership List ................................ 15

Hydatid Disease (Echinococcosis) In Alaska And The Importance Of Rodent Intermediate Hosts, Robert L. Rausch, Everett L. Schiller

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Hydatid disease, caused by the larval form of a tapeworm, Echinococcus granulosus (Batsch, 1786), is of circumpolar distribution, but has not previously been considered to be of much public health significance in North America. It is the purpose of this paper to present observations on this disease in Alaska, with special reference to its transmission to humans.

Range Condition Classes Of Native Midwestern Pasture: An Ecological Analysis, John Voigt, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

Table of Contents:
Introduction
Classes Of Prairie Plants
Process Of Degeneration Of Prairie
Stages Of Degeneration
The Areas Studied
Location And Size
Topography, Water, And Soil
Vegetation
Excellent Pastures
Good Pastures
Fair Pastures
Poor Pastures
Methods
Comparison Of Range Condition Classes
Excellent Range Condition
Good Range Condition
Page Fair Range Condition
Poor Range Condition
Resume
Occurrence Of Forbs
Basal Area, Mulch, And Bare Soil
Height Of Grazing
Unconsumed Forage Furnished By Grasses And By Forbs
Forage From Grasses
Forage From Forbs
Resume
Amount And Composition Of Unconsumed Forage
Discussion
Summary
Literature Cited

Bulletin No. 6: Check List Of Woody Plants Growing In The Connecticut Arboretum And Guide To The Arboretum, Richard H. Goodwin, Katherine H. Heinig, Kaleb P. Jansson

Bulletins

No abstract provided.

Factors Governing The Retention Of Starches Added To Pulp In The Beater, Gordon J. Gill

Paper Engineering Senior Theses

Introduction

The information presented in this literature survey was obtained through Western Michigan College Library, Kalamazoo Public Library, St. Regis Central Laboratory, and Kalamazoo Vegetable Parchment Research Library.

The following survey is the result of twelve weeks of library research and was done in accordance with the methods and rules prescribed by Course 436A, Pulp and Paper Technology, Western Michigan College of Education.

Considering retention, from a general point of view, we find in Webster's New International Dictionary that it is, "A retaining or holding fixed in some place or position; state of being kept in place." Sutermeister (20) gives …

A Comparison Of The Methods Used To Produce Water-Resistant Starch Coatings, Elton Thomas Krogel

Paper Engineering Senior Theses

Part I

Literature Survey

The use of the starch in the coating of paper has been very extensive. The reason being that starch and its conversion products have most of the desirable characteristics of a coating adhesive and are relatively inexpensive. Only one main characteristic is missing in coatings made with starch and that is the lack of water resistance. For many years the paper industry, the adhesive industry, and the textile industry have searched for a method of modifying starch so as to increase its water resistance. A great many processes have developed from these studies. These processes consist …

The Significance Of Tests Performed On The General Electric Puncture Tester, Roger E. Mcvickar

Paper Engineering Senior Theses

With the steadily increasing use of fiberboard containers for purposes for which other materials were formerly used, determination of the durability of such containers has become a major problem. This is especially true of the food industry, which is now using over 30% of all fiberboard containers manufactured in the United States - a larger proportion than is used for any other single purpose. (2)

A Comparison Of Enzyme Converted Starches Used In Surface Sizing, Edward E. Stephenson

Paper Engineering Senior Theses

A literature survey shows an increasing trend in the direction of using enzyme converted starch tub sizing solutions in paper making. Bacterial alpha amylase seems indicated as the best available enzyme for this type of conversion.

Little or no information concerning the differences in sizing solutions prepared from different varieties of starch was found.

Laboratory work comparing corn and potato starch, both enzymes converted under comparable conditions, indicates a conclusion that the optimum point of starch conversion is obtained by using the minimum concentration of enzyme which is capable of producing the desired sizing solution viscosity.

Potato starch seems to …