Life Sciences Commons^™

Long Term Rotation Trials, Ian Rowland

Experimental Summaries - Plant Research

The object of these trials is to attempt to determine the best rotation for each area or at least give some guidelines for recommendations as to the optimum rotation. Also to determine the effect of various pasture phases on the performance of the following crops and the number of crops required to utilise any accrued benefit from the pasture. In addition the trials on the Salmon Gums Research Station (68SG5) will attempt to compare cereal rotations on both volunteer and barrel medic pastures. It is also hoped to be able to get some estimate of grazing production from barrel medic …

Ammonium Nitrate Vs Urea, M G. Mason

Experimental Summaries - Plant Research

Ammonium nitrate is a source of nitrogen containing half

its nitrogen in the ammonium form and half in the nitrate form.

Some properties are set out in comparison with urea in the

following table.

Ammonium nitrate has an advantage over urea in that it can

be topdressed onto the surface of the soil and left uncovered

without a danger of loss of nitrogen to the atmosphere. When urea

is left uncovered on the surface of the soil losses of nitrogen occur

through volatilisation of ammonia during the hydrolysis of the urea.

Such losses with ammonium nitrate are only likely to …

Evaulation Of Pastures Species, G Walton

Experimental Summaries - Plant Research

The 1969/70 Experimental Programme was the evaluation of pasture species, which includes both introductory evaluation in small plots and evaluation of the most promising pastures under the influence of grazing animals. GRAZING TRIALS The continuation of the evaluation of Uniwager and Daliak subclovers in two series of trials: Series 2 (medium rainfall) (2575Ex) - 68TS12 (Eneabba) 68NA15 (Bullaring) 68LG17 (East Pingrup) Series 3 (low rainfall) (2576Ex) 68GE9 (Gutha) 68M024 (Kirwin) 68ME13 (Nokaning) The comparison of Tornafield medic with suitable subclovers (2709Ex); 69M017 (Watheroo) and 69LG24 (Lake Grace). The continuation of the legume species grazing trial. 66LG11 (Lake Grace) (2225Ex) and …

The Effects Of Light Quality And Culture Age On Protein Synthesis In Oscillatoria Species , Jon Chesnut

Master's Theses

No abstract provided.

Observations On Platypus Flavicornis (Coleoptera: Platypodidae) In Southern Pine Beedle Infestation, Jack E. Coster

Faculty Publications

No abstract provided.

Some Parameters Of The Second-Order Conditioning Of Fear In Rats, Alan Kamil

Papers in Behavior in Biological Sciences

The effects of CS1 duration, partial reinforcement, and trace conditioning on second-order conditioned suppression were investigated, employing 64 rats as Ss. In Experiment 1, the clearest second-order conditioning was obtained when CS1 duration was the same during both the first- and the second-order conditioning phases of the experiment. In Experiment 2, somewhat better second-order conditioning was obtained when first-order conditioning had been under conditions of partial reinforcement, delay CS-US pairing. In neither experiment were CS1 suppression and CS2 suppression during second-order testing well correlated. This aspect of the results raised the question of the influence of nonclassical conditioning factors on …

The Masked Duck In The United States, Paul A. Johnsgard, Dirk Hagemeyer

Papers in Ornithology

Reports on the first-known accounts of masked duck breeding in the United States.

Simulation Of The Growth Of Even-Aged Stands Of White Spruce, Kenneth J. Mitchell

Yale School of the Environment Bulletin Series

No abstract provided.

Wood Formation And The Concept Of Wood Quality, Philip R. Larson

Yale School of the Environment Bulletin Series

No abstract provided.

On Temperature And Heat Flow In Tree Stems, Lee Pierce Herrington

Yale School of the Environment Bulletin Series

No abstract provided.

Some Corporations That Own Farm And Ranch Land In South Dakota, Russell L. Berry

Agricultural Experiment Station Agricultural Economics Pamphlets (1941-1991)

Concern has developed about large out-of-state corporations that own agricultural land in South Dakota. Fears that such corporations may destroy family farms are often expressed. As a result legislation has been proposed which would prohibit such corporations from farming unless 51 percent of stock is owned by South Dakotans. Do present out-of-state corporations justify such fears? A survey recently made indicates that most out-of-state corporations lease their land to independent farmers. Those few that directly manage their land are not much if any different from the home-grown kind. Most appear to be held and operated by families. The survey was …

Vitamin A In Beef Cattle Feeding, L.B. Embry, L.J. Kortan

Agricultural Experiment Station Animal Husbandry Pamphlets

Vitamin A is essential for all cattle. The vitamin does not occur naturally in feeds of plant origin. Many cattle are never fed vitamin A as such but do not develop a deficiency of the vitamin. The reason for this is that many feeds (pasture, good quality hay, silage, and yellow com) furnish carotene which is converted to vitamin A in the animal body.

South Dakota Farm And Home Research, Agricultural Experiment Station, South Dakota State University

South Dakota Farm and Home Research: 1949 -1998

Contents:
Cooperators Provide Many Facilitates for Statewide Agricultural Research [p] 2 From irrigation: $97 Million Annual Impact on Retail, Service Trade [p] 3
Sprinkler Irrigation System plus Fertilizer equals FERTIGATION [p] 5
Remote Sensing in South Dakota [p] 9
Returns from Beef Production on Irrigated Pastures vs. Returns with Other Crops [p] 12
Range Sites as Sources for Livestock Water [p] 13
Cost of Marketing Livestock Through Auctions [p] 17
Phosphatic Urinary Calculi [p] 19
Dangerous Tractor Noise…Maybe It’s on the Way Out [p] 24
A New Oat: KOTA [p] 28
A New, Better Barley: PRIMUS II [p] 29
Growers …

Cellular Activities During Aging In Mammals, Caleb Ellicott Finch

Student Theses and Dissertations

Although much is known about manifestations of ageing in mammals, the fundamental cause of ageing has remained obscure. Review of a widely scattered literature has demonstrated a histotypic selectivity in the effect of ageing on cell activitjes. Several recent examples have shown that certain age changes in cell activities can be reversed by transplantation to a young host. Thus, ageing does not appear to diminish the potential for genomic function. The selective and reversible age changes in cell activities are interpreted to be the result of a differential change in gene activity, which appears to be mediated at the supra-cellular …

The Structure And Replication Of Semliki Forest Virus, A Mosquito-Borne Animal Virus, Nicholas Hill Acheson

Student Theses and Dissertations

Semliki Forest virus is a group A arthropod-borne virus which contains RNA and possesses a lipoprotein envelope. It can be transmitted among animals by mosquitoes in which it multiplies, but its natural host is not known. The virus grows to high titer in a number of types of vertebrate cells in culture. The growth of Semliki Forest virus was studied with the electron microscope during a single cycle of viral replication in chick embryo cells. The spherical virus particle consists of a nucleoid, or nucleocapsid, 280 A in diameter, closely wrapped in an envelope which consists of a unit membrane …

Some Problems Connected With The Boltzmann Equation, Francisco Alberto Grunbaum

Student Theses and Dissertations

Consider a dilute gas composed of a very large number of molecules moving in space according to the laws of classical mechanics, and colliding in pairs from time to time, Assume that we can disregard all external effects, such as gravity, so that the motion is completely specified by giving the intermolecular forces.

Radiative Corrections To Low Energy Theorems, Ta-Pei Cheng

Student Theses and Dissertations

A general method is presented for evaluating, in a model - independent way, the soft virtual photon radiative corrections to an arbitrary hadronic process. It is shown that all the results concerning infrared divergence s obtained within the theory of quantum electrodynamic s of the electron-photon system are, in fact, exact in strong interactions. The problem of radiative corrections to low-energy theorems is the primary concern of this investigation.

Protein Polysaccharides From Bovine Nasal Cartilage Interactions With Glycoproteins And The Formation Of Aggregates, Vincent C. Hascall Jr

Student Theses and Dissertations

Proteinpolysaccharides are macromolecules which consist primarily of chondroitin-4-sulfate associated with non-collagenous protein. They constitute about half of the dry weight of adult bovine nasal cartilage; the remaining material is predominantly collagen.

Factors Affecting Translation Of Messenger Rna's In Vitro: Use Of A Gtp Analogue To Investigate Rates Of Polypeptide Chain Elongation, Fred Russell Kramer

Student Theses and Dissertations

The order of addition of amino acids to a growing protein is determined by the codon sequence of a messenger RNA molecule. This translation process was studied in vitro with a cell-free protein synthesis system derived from Escherichia coli. The rate of protein synthesis was proportional to the amount of messenger RNA added to the system. However, it was observed that different messenger RNA's were not equally effective in promoting protein synthesis. Experiments were conducted to determine why the rate of protein synthesis depends on the type of messenger RNA.

The Golgi Complex Of The Hepatogyte: Isolation And Partial Enzomological Characterization, John Heiman Ehrenreich

Student Theses and Dissertations

The elements of the Golgi complex of the hepatocyte are characterized by their content of 30-80m osmiophilic particles, which have been identified by others as very low density lipoprotein. The vast majority of such particles in the cell are in the elements of the Golgi complex. Moreover, the number in the complex can be increased still further by acute ethanol intoxication. This light lipoprotein content afforded the opportunity to isolate a purified fraction of Golgi-derived vesicles from the liver cell, since the content itself would make these vesicles lighter than vesicles derived from other intracellular sources (which do not contain …

I. Solution Photochemistry Of Camphor Ii. Synthesis And Solution Photochemistry Of 2, 2-Dimethylcyclobutanone, David Kent Herron

Student Theses and Dissertations

No abstract provided.

The Arrangement Of The Disulfide Bonds In A Γg Immunoglobulin Molecule, William Einar Gall

Student Theses and Dissertations

No abstract provided.

Viral Inhibition Of Mammalian Cell Dna Synthesis, William D. Ensminger

Student Theses and Dissertations

No abstract provided.

Meteorological Factors Controlling The Emergence Of The Eastern Spadefoot Toad, Scaphiopus Holbrooki Holbrookii Harlan, Larry Judy

Theses, Dissertations and Capstones

Scaphiopus holbrooki holbrookii, the Eastern Spadefoot, can exist in an area for many years before it is detected. Its apparent scarcity can be explained by its secretive, fossorial habitat, protective coloration, and nocturnal behavior. Spadefoots are present at the surface locally in small numbers on any one night. They emerge only when conditions are optimum. One authority has suggested that temperature, moisture, and barometric pressure exert control over emergence.

It was the purpose of this research to discover the most important meterorological parameters and investigate how they control the behavior of Scaphiopus.

Initially the response, emergence to breed was distinguished …

An Ultrastructural Investigation On The Origin Of Murine Langerhans Cells, Stanley Powell Tompkins

Master's Theses

The mammalian epidermis has been described as consisting of three different cell populations: keratinocytes, pigment cells, and Langerhans cells. Ultrastructural investigations of mamalian skin within the last decade have resulted in criteria whereby these cell types can be differentiated upon electron microscopic examination.

The present study was undertaken to investigate the occurrence of epidermal Langerhans cells in both neural crest-free and normal PET mouse skin, and to present evidence for a possible origin of the epidermal Langerhans cells of murine skin.

The Effects Of Cationically Charged Titanium Dioxide On Particle Dispersion In The Sheet Of Paper, Neil A. Hartman

Paper Engineering Senior Theses

Comercial bleached soft wood sulfite pulp was used. The pulp was refined in a Standard Valley Beater to a Canadian Standard freeness of 428. This pulp was preserved and used to make all of the handsheets, on a Noble and Wood handsheet mold.

The Titanium dioxide added to the handsheets was prepared in three different ways: simple dispersion, dispersion of the Titanium dioxide along with cationic substances, and addition of the dispersed Titanium dioxide and the cationic substance to the pulp without previous co-dispersion. The optical properties of the sheets were measured and the Titanium dioxide in the sheets was …

On Models Of Commercial Fishing, Vernon L. Smith

Economics Faculty Articles and Research

Commercial fishing is characterized by three key economic and technological features that are relevant to the formulation of an economic theory of fish production. 1. A fishery resource, although conceivably exhaustible, is replenishable; that is, it is subject to laws of natural growth which define an environmental biotechnological constraint on the activities of the fishing industry. 2. The resource and the activity of production from it form a stock-flow relationship. The new growth in the population fish mass depends upon the harvest rate relative to natural recruitment to the stock. If the harvest rate exceeds the recruitment rate, the stock …

Marvel Baker Hall

Department of Animal Science: Departmental News

Completed in 1969, Marvel Baker Hall permitted total integration of the staff members concerned with meat production and those specializing in dairy production. The facility has research and teaching capabilities that enhance the effectiveness of the Animal Science Department's public service. The academic community of animal agriculture centering in Marvel Baker Hall stimulates self improvement and development of the scientist-teacher on the staff. Nebraska's youth who study Animal Science profit through the excellence of the educational opportunities available to them including work in the analytical laboratories, the meat laboratory, and in the animal units as well as participating in extracurricular …

The Ias Bulletin, V3n1, January 1969, Iowa Academy Of Science

IAS Bulletin

"

In this issue:

--- Call for Papers
--- Visiting Scientist Program
--- Speakers' Bureau Directory
--- Special Committee Named
--- State-Wide Articulation Committee Appointed
--- Report fromthe ISTS Short Course Committee
--- Constitution Revision
--- Industrial Support Being Solicited
--- Special Bulletin Going Out to all High School Science Teachers
--- Membership Information
--- Academy Representatives Attend AAAS Convention
--- Proceedings for 1967 and 1968
--- Research Grants Awarded
--- New Section to Appear on the 1969 Program
--- Program Notes from Other Sections
--- Eighty-First Session at Cedar Falls
--- Call for Nominations for Teacher Awards
--- Selected …

Development Of Vascular Connections Between Lateral Buds And Main Stem In Some Decapitated Plants, Syed Mushtaq Husain, Albert J. Linck

Journal of the Minnesota Academy of Science

After decapitation of pea plants, with resultant growth of lateral buds, the thickness of vascular tissue appeared to be correlated with the growth rate of buds. Basal lateral shoots had better developed vascular strands than buds on upper parts of the plants. IAA application retarded growth of the lateral buds and inhibited their vascular connections, but all lateral buds eventually grew in spite of the IAA application.