Life Sciences Commons^™

Soybean Field At Sunset

Farming in Arkansas

A picturesque landscape photograph of a soybean field at sunset.

Rufus Laine And Mule Team

Farming in Arkansas

Color photograph of Rufus Laine, who used a team of mules to pull his plow. Laine was a farmer in Craighead County.

Rufus Laine On A Plow

Farming in Arkansas

Color photograph of Rufus Laine on his mule-drawn, double plow. Laine was a farmer in Craighead County.

Rice Stalk At Sunset

Farming in Arkansas

Color photograph of a ripe rice stalk in silhouette against the setting sun.

Caroline Laine With Woodstove

Farming in Arkansas

Image of Caroline Laine, wife of Rufus Laine, standing by her primary cooking tool, a wood burning stove.

Caroline Laine With Waterpump

Farming in Arkansas

Photograph of Caroline Laine, the wife of Rufus Laine, sitting in her kitchen by the water pump.

Rufus Laine Dual Plow

Farming in Arkansas

Color photograph of Rufus Laine using a dual plow drawn by a team of mules. Laine was a farmer in Craighead County.

Rufus Laine With Waterpump

Farming in Arkansas

Color photograph of Rufus Laine utilizing the waterpump on his property. Laine was a farmer in Craighead County.

Mr. Dehls' Hay Feeder

Farming in Arkansas

Photograph of a hand-built hay feeder outside of Mr. Dehls' barn.

Mr. Dehls' Hay Barn

Farming in Arkansas

Photograph of a ladder leading up to a large, stocked hayloft in Mr. Dehls' barn.

W.H. Warren's "Lizard" Used To Haul Rock

Farming in Arkansas

Photograph of a wooden sled called a "lizard" that is designed to haul rocks.

Frozen Cotton Field

Farming in Arkansas

Photograph of a cotton field that has iced over before being fully harvested.

Fordson Tractor

Farming in Arkansas

Photograph of a Fordson Model F tractor in a field in Northeast Arkansas.

Barn And Grader

Farming in Arkansas

Photograph of a horse-drawn grader in front of an older barn with a wagon under the overhang.

Manure Spreader

Farming in Arkansas

Photograph of a wagon with a metal attachment used for spreading manure.

Kerosene Lantern

Farming in Arkansas

Photograph of a kerosene lantern hanging on the outside of a barn.

Kate The Logging Mule

Farming in Arkansas

Photograph of a mule named Kate who was used for hauling logs.

Brush Arbor

Farming in Arkansas

Photograph of a simple arbor created with brush in a farmer's field.

Biomass And Nutrient Content Of Green Material The Size Of Medium And Large Litter, William E. Miller

Aspen Bibliography

No abstract provided.

Studies On Atp-Dependent Co2 Fixation By Desulfovibrio Vulgaris, Maria Alvarez H.

Biology ETDs

Cell-free extracts and whole cell suspensions of Desulfovibrio vulgaris were employed to examine the fixation of ¹⁴CO₂ into acid stable material. Moderate levels of CO₂ fixation occured in the presence of ribulose-1,5-diphosphate, ribose-5-phosphate or pyruvate with only minimal levels of CO₂ fixation occuring with formate, malate, or succinate. The fixation of CO₂ in the presence of pyruvate was attributed to the pyruvate-CO₂ exchange reaction. This exchange reaction was dependent on the presence of an acidic protein fraction but was not stimulated by the additions of ATP to the reaction mixture. The fixation of CO …

Bvr-1, A Restriction Locus Of A Type C Rna Virus In The Feline Cellular Genome: Identification, Location, And Phenotypic Characterization In Cat X Mouse Somatic Cell Hybrids, Stephen J. O'Brien

Biology Faculty Articles

Somatic cell hybrids were constructed between BALB/c-RAG mouse cells and feline lymphoma cells by the hypoxanthine-aminopterin-thymidine selection scheme. RAG cells spontaneously produce an endogenous B-tropic type C virus. Cat-mouse hybrids preferentially segregate feline chromosomes and retain murine chromosomes,demonstrable by karyotypic and isozyme analyses. Despite the presence of the complete mouse genome, including the viral genome, virus production was diminished to 1-5% of the levels observed in RAG parents based upon particle-associated RNA-dependent DNA polymerase (reverse transcriptase) activity in the culture fluid. Thirty-seven hybrids made on four different occasions had suppressed virus levels, and no hybrids expressed parental virus levels. Reverse …

Cardiorespiratory Responses To Submaximal Exercise In Water, Karen Ann Carlberg

Biology ETDs

Maximal oxygen consumption is consistently lower when measured during swimming than during running or bicycling. A number of factors could contribute to this difference, including size of active muscle mass, body position, heat exchange mechanisms, breathing patterns and adjustments to water immersion.

In this study, the effects of water immersion on submaximal exer­cise were isolated by having subjects perform identical work in air and water. The exercise consisted of rowing on a rowing machine, with rate of movement controlled so that the subjects always worked at the same relative workload and oxygen consumption. To compare the physiological responses to exercise …

The Effects Of Tsh And Culture Conditions On Nucleic Acid Synthesis In Thyroid Cells In Vitro, David J. Orlicky

Biology ETDs

Cells enzymatically dispersed from ovine thyroid tissue were cultured in Ham's F-10 medium supplemented with 8.33% Fetal Calf Serum and 8.33% Lamb Serum. Cultures were maintained in a humidified 37° C incubator having a 5% CO₂ - 95% air atmosphere. At 48 hours post isolation, cell culture medium was replaced and experiments begun. Altering the serum content (between 4.76 - 16.66%) of the nutrient medium had little effect upon either DNA content or ³H-thyrnidine incorporation into DNA. Thyroid-Stimulating Hormone (TSH) seemed to have a stablizing effect upon DNA content (between 0 and 7 days post TSH addition), and …

Interspecific And Intraspecific Variation Between And Among Symphurus Plagiusa (Linnaeus) And Symphurus Civitatus Ginsburg With Notes On Their Distribution, Chester A. Nava Jr.

Morehead State Theses and Dissertations

A thesis presented to the faculty of the School of Sciences and Mathematics at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science in Biology by Chester A, Nava, Jr. on December 3, 1976.

The Prairie Naturalist Vol. 8, Nos. 3 And 4 September-December 1976

The Prairie Naturalist

SPRING MORTALITY OF INSECTIVOROUS BIRDS IN SOUTHERN MANITOBA ▪ J. R. Serie and R. E. Jones

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1976 ▪ R. N. Randall

MOSSES OF THE GREAT PLAINS: INTRODUCTION AND CATALOGUE ▪ S. P. Churchill

NOTES

Fulvous Tree Duck in North Dakota ▪ L. A. Jones

Unusual Mortality of a Saw-whet Owl ▪ H. A. Kantrud

Cardinal and Mockingbird in Jamestown, North Dakota ▪ D. H. and J. E. Johnson

BOOK REVIEWS

Essence of Wilderness ▪ K. T. Killingbeck

The Changing America ▪ L. M. Kirsch

A Government Bird Book ▪ J. F. Cassel

Wildflowers ofthe Rockies …

Results Of The Sixth International Winter Wheat Performance Nursery Grown In 1974, K. D. Wilhelmi, S. L. Kuhr, V. A. Johnson, P. J. Mattern, J. W. Schmidt

Historical Research Bulletins of the Nebraska Agricultural Experiment Station

This is the sixth report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station and the Agricultural Research Service, U. S. Department of Agriculture, under a contract with the Agency for International Development, U.S. Department of State. The Nursery was designed to (1) test the adaptation of winter wheat cultivars in a range of latitudes, daylengths, fertility conditions, water management, and disease complexes; (2) identify superior winter cultivars to serve as recipient genotypes for high protein and high lysine genes, and (3) test the degree of expression and stability of …

Numerical Techniques For Classifying Forest Communities In The Tennessee Valley, Dennis Michael Mccarthy

Doctoral Dissertations

The main objectives of this study were:

1. To develop a series of vegetational classification systems based on the floristics of community strata, overstory structural functional features, and environmental parameter of a region typical of the temperate Tennessee Valley;

2. To examine the suitability of these classification systems for the complex forests of the Tennessee Valley;

3. To develop numerical tools for evaluating classification suitability;

4. To use these tools to seek out natural discontinuities in vegetational patterns.

To achieve these goals six multivariate cluster analysis programs were examined. Preliminary tests brought out undesirable properties in four of them, however, …

Development Of A Mathematical Model That Will Predict The Mean Daily Dietary Intake Of Pregnant Women Based Upon Sociological, Psychological And Physiological Factors Assumed To Be Related To The Mean Daily Dietary Iron Intake, Waneen Ann Liudahl

Doctoral Dissertations

The purpose of this investigation was to develop a mathematical model using linear stepwise regression analysis that would predict the dietary iron intake of pregnant women. Development of the mathematical model was based upon sociological, psychological and physiological factors assumed to be related to the dietary iron intake of pregnant women.

Fifty-seven pregnant women participated in the study. They were private outpatients of two obstetricians at the Macomb Clinic, Macomb, Illinois.

The dependent variable used in the development of the models was the seven-day mean daily dietary iron intake for each pregnant woman which was obtained during the second and/or …

Intrerconversion Of Replicative Forms Of Sindbis Virus Rna And The Electrophoresis Of Viral Rna, Jonathan D. Martin

Doctoral Dissertations

Three species of double-strand (ds) RNA, designated RF I, RF II, and RF III in order of decreasing size, were produced by RNase treatment of extracts of chicken embryo cells infected for 6 h with Sindbis virus. These species were identifiable with those reported by Simmons and Strauss (28). At a low level of enzyme (0.001 µg/ml) the major species obtained was RF I. When the enzyme concentration was increased 10-, 100, and 1000-fold, there was a progressive increase in the proportions of RF's II and III and a concurrent decrease in the proportion of RF I. Only RF I …

Tb84: Controlling The Saratoga Spittlebug In Young Red Pine Plantations By Removal Of Alternate Hosts, J. P. Linnane, E. A. Osgood

Technical Bulletins

The Saratoga spittlebug, Aphrophora saratogensis (Fitch), is a major pest of young red pine (Pinus resinosa Ait. ) and jack pine (Pinus banksiana Lamb. ) plantations in the Lake States, Ontario, and more recently in the Northeast. Although insecticides are successful in controlling the Saratoga spittlebug, the biology of the insect raises the possibility of an alternative method of control. The spittlebug requires an alternate host to complete its nymphal development. The objective of this study was to investigate the feasibility of using herbicides to control nymphal host plants of the spittlebug in red pine plantations.