Digital Commons Network^™

An Intensive Edaphological Characterization Of The Soils Of Malambito Experimental Station And Its Implications In Future Agricultural Research, William L. Rubink

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Malambito Experiment Station, in the Atlántico III project area, Department of Atlántico, Colombia, had almost no quantitative edaphological data on which to base agricultural research. Unexplainably low general yields as well as problem areas of deficient plant growth only confounded the results of field plot experiments. Intensive soil sampling and subsequent measurements of pH, EC_e of the saturation extract, and the four major cations disproved the previous suggestions that the crop growth problems were related to saline, sodic, or degraded soil conditions. The Ca/Mg+K+Na ratio, although significant when correlated with plant height, was sufficient explanation for only a small …

An Investigation Of Cluster Analysis, John C. Klingel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Three cluster analysis programs were used to group the same 64 individuals, generated so as to represent eight populations of eight individuals each. Each individual had quantitative values for seven attributes. All eight populations shared a common attribute variance-covariance matrix.

The first program, from F. J. Rohlf's MINT package, implemented single linkage. Correlation was used as the basis for similarity. The results were not satisfactory, and the further use of correlation is in question.

The second program, MDISP, bases similarity on Euclidean distance. It was found to give excellent results, in that it clustered individuals into the exact populations from …

85th Session Of The Iowa Academy Of Science, April 27-28, 1973, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

Abstracts Of Papers Presented At The 85th Session Of The Iowa Academy Of Science, April 27-28, 1973, Iowa Academy Of Science

Iowa Academy of Science Documents

Presentation abstracts from the annual meeting of the Iowa Academy of Science

The Synthesis Of Pyrimidines And Condensed Pyridazines As Potential Antimetabolites, Judith A. Wagner

Chemistry and Chemical Biology ETDs

Interest in the compounds described by this thesis was first aroused in the early 1930's when a research team began to investigate the mass poisonings of the population in Indonesia. The cause of the poisonings seemed to be the foodstuffs which the people made for themselves from the abundant coconut. Two products in particular, Bongkrek and Semaji, made from coconut presscakes and grated coconut, were apparently the source of the toxic substance. When made under improper conditions, the toxic principle developed in an otherwise harmless food product. A compound was finally isolated and established as the toxic principle by …

New Techniques In Precision Gamma Scanning: Application To Fast Breeder Reactor Fuel Pins, John R. Phillips

Chemistry and Chemical Biology ETDs

A new precision gamma scanning system is described. The system is designed for the thorough, detailed, nondestructive characterization of irradiated fast reactor fuel pins. Gamma scanning data are given for failed fuel pin , transfer mechanisms of fission products, quantitative isotopic scan­ning, and differential burnup profiles.

The system consists of a scanning mechanism for the precise positioning (±0.001 in.) of the irradiated fuel pin, high density tungsten alloy collimators for defining the volume segment from which the gamma-ray spectra are collected, a large high resolution an anticoincidence detector assembly for resolving complex gamma-ray spectra, and a computer con­trolled data acquisition …

Solid Waste Disposal And Ocean Dumping, John William Sellers

Marine Affairs Theses and Major Papers

A broad-scope overview of the solid waste disposal problem as intensified by legislation against ocean dumping of such wastes. Since the problem of increasing ocean pollution was partly solved by extensive restrictions on ocean dumping, wastes formerly disposed of in the oceans must now be disposed of by other methods. These alternative methods are discussed and cost estimates applied insofar as feasible; effects on the environment and on the conservation of natural resources are also discussed. Efforts should be directed to determine the level of solid waste disposal which would result in beneficial effects, or at the worst, in non-harmful …

A Field Study Of Selected Ecological Properties Of Boca Ciega Bay And Adjacent Gulf Of Mexico, Geo-Marine, Inc.

Reports

This report describes a quantitative study of selected environmental parameters in a portion of Boca Ciega Bay and in the Gulf of Mexico adjacent to Johns Pass. The investigation included an analysis of hydrography and water quality during the period 14-20 February 1973. The objective of the study was to assess the present marine environment in order to judge the ecological feasibility of discharging tertiary treated sewage effluent into Boca Ciega Cay or secondary treated effluent into the Gulf of Mexico. The discharge would come from the proposed expansion of the South Cross Bayou sewage treatment plant.

Ua77/1 Western Alumnus, Vol. 42, No. 3, Wku Alumni Association

WKU Administration Documents

WKU alumni magazine. Features the following articles:

• Corts, Paul. Western's Honors Program Forges Ahead
• Gray, David. Students Still Work Their Way
• Mefford, David & Roy Reynolds. Reaching Out for the Good Student
• Lawrence, Fred. Nick Rose All American
• Yeager, Randolph. A Westerner Remembers Harry Truman
• Scarborough, Clarice. Western Goes to Mexico
• Dillard, Gary & Rudolph Prins. Western at Tech Aqua
• Lawrence, Fred. Student Teaching - a la Guatemala
• Corts, Paul. Theatre Study Goes British
• Thompson, Kelly. The Most Unforgettable Person I Have Ever Known . . . Henry Cherry
• Commonwealth in a Capsule - Kentucky Building
• Adams, Ronald. Teacher Evaluation …

Development Of Standard Procedures For Determination Of [Delta]G° (K), [Delta]H° And [Delta]S° Values Via Potentiometric And Calorimetric Titration Techniques, Jack Hugh Ruckman

Theses and Dissertations

Standard computer techniques were developed for computation of ΔG° values from potentiometric titration data and ΔH° values from calorimetric titration data. The procedures developed can be used for any systems having the general equations HA = W^+ + A^- ; H_2A = 2H^+ + A^2- ; and H_3A = 3H^+ + A^3-, where the proton ionizations may be consecutive or simultaneous. The thermodynamic values ΔG°(K), ΔH° and ΔS° were determined for the ionization of protons from the protonated compounds methionine (-NH_3^+ group only), phosphoethanalomine and phosphoserine. The compounds studied were selected because they contain one, two and three ionizable protons …

A Seasonal Distributional Survey Of The Epiphytic Diatoms Of The Outer Banks Region Of North Carolina With Respect To Temperature And Salinity, Charles Welles Belin Jr.

OES Theses and Dissertations

This study was initiated to investigate epiphytic diatoms at selected stations along the North Carolina coast and bay region. The relationships between these organisms and the season of the year and salinity and temperature of the water in which they were found are considered. The special affinity between the epiphytic diatoms and their host plants is also discussed. The specific data were analyzed statistically via linear correlation coefficients, graphs of least squares-best fit, and multiple linear regression analysis.

From the statistical tests, it was found that the mean number of epiphytic diatoms shows a significant multiple linear regression with respect …

Transforming Ability Of Bacillus Subtilis Dna Taken Up By Barley Embryos, Christine Tolman Ence

Theses and Dissertations

Purified Bacillus subtilis DNA taken up by one-day-old barley embryos and permanently fixed within the barley cell is shown to have maintained its biological activity in B. subtilis transformation. Cesuim chloride density gradient centrifugation of DNA isolated from the roots of barley embryos after the uptake and incorporation of radioactive, bromouracil-labelled B. subtilis DNA indicates the presence of the bacterial DNA in several discreet bands of well-defined density, whose density is changed by sonication. These preliminary findings concerning the fate of bacterial DNA taken up by barley roots are discussed in terms of the recombination model of Ledoux and Huart …

|Ni.|Pa Calorimetric Study Of The Heat Of Ionization Of Water At 10 And 40°C, And,|Nii.|Pa Calorimetric Determination Of The Heat Of Reaction Of Tris (Hydroxymethyl) Aminomethane (Tham) With Hydrochloric Acid In Aqueous Solution At 10, 25, And 40°C, Griffith Lyn Kimball

Theses and Dissertations

The heat of neutralization, ΔH_-N, of perchloric acid with sodium hydroxide has been determined at 10 and 40° in a low ionic strength, μ, region using a nonisothermal, constant-temperature-environment solution calorimeter. Correction of the data to infinite dilution by extrapolation of a plot of ΔH_-N vs μ^0.5 gives values at zero ionic strength for the heat of ionization of water of 14.216 and 12.695 kcal/mole, respectively, at 10 and 40° . The data are correlated with those of earlier workers to give an equation allowing the calculation of the heat of ionization of water at zero ionic strength over the …

The Determination Of Thiamin And Its Derivatives In Brain Tissue Of Control, Thiamin-Deficient, Oxythiamin- And Pyrithiamin-Treated Rats, David S. Murdock

Theses and Dissertations

The determination of total thiamin, free thiamin, thiamin di phosphate (TDP) plus thiamin triphosphate (TTP), and total α- hydroxyethylthiamin (HET) levels in rat brain in control, deficient, oxythiamin- (OTH) and pyrithiamin- (PTH) treated rats was accomplished. It was found that the TDP + TTP/thiamin ratio observed in the thiamin-deficient, OTH- and PTH-treated rats was constant and did not differ from the ratio observed in the control rat brains. The brain levels of TDP + TTP decreased to 39% and 12% of the control thiamin levels in deficient and PTH-treated rats respectively. The brain HET and TDP + TTP levels of …

The Prairie Naturalist Volume 5, No. 1. March 1973

The Prairie Naturalist

DATES FOR FIRST FLOWERS ▪ O. A. Stevens

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA—1972 ▪ Robert N. Randall 7

NORTHERN ENVIRONMENTAL COUNCIL CORPORATE AWARD, 1972—RESPONSE ▪ K. A. Carlson

ALGAL ASSOCIATIONS IN NEARSHORE WATERS OF GOLDEN LAKE, A SHALLOW PRAIRIE LAKE IN EASTERN NORTH DAKOTA ▪ Douglas W. Larson

NOTE

Observations of Wintering Bald Eagles at Garrison Dam, North Dakota ▪ Frank A. Splendoria

Water Resources News, Volume 5, No. 3, March 1973

Water Current Newsletter

From the Desk of the Director
Interdisciplinary Water Resource Seminar
Nitrogen In Nebraska's Environment
Cottonwood Watershed Gets Award
Water Conference at Nebraska Center
New Senior Specialist in Engineering and Public Works
New Officers for NWRA
Rain Bombs
Institute for Environmental Studies at Illinois
Water Pollution Study: Pushbutton?
Superport Sites for Oil Tankers
Report on Irrigation in Bulgaria Announced
World Climatic Data

Response To Alloformitarianism, Richard G. Hodgson

Pro Rege

No abstract provided.

Terminal Talk - The Wofford Connection - February 1973, Wofford College Computer Center

Terminal Talk

No abstract provided.

Activities Of The Advisory Committee On Scientific And Natural Areas, Robert W. Burwell

Journal of the Minnesota Academy of Science

Significant actions taken by the Commissioner, Department of Natural Resources of the State of Minnesota, on recommendations of the Advisory Committee on Scientific and Natural Areas includes: issuance of policy statements and directives establishing criteria for defining and classifying scientific and natural areas; and rules and regulations applicable to such areas. Listed are the first four areas recommended for official designation. The status of an inventory of scientific and natural areas is summarized, and a description is given of the Advisory Committee procedure for processing recommendations for establishment of areas to be officially designated by the state.

Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, R. L. Kirkland

Memorandum

No abstract provided.

Distribution Of Mictroorganisms In Desert Soil, A.T. Vollmer, F. Au, S.A. Bamberg

Memorandum

No abstract provided.

Terrestrial Models: Soil Processes (Versions I, Ii, Iii), J. Radford

Memorandum

No abstract provided.

Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T.C. Tucker, R.L. Westerman

Memorandum

No abstract provided.

A Eutrophication Model Of The White River Basin Above Beaver Reservoir In Northwest Arkansas, Robert A. Gearhart, Dee Mitchell, Louis Thibodeaux, Richard Meyers

Arkansas Water Resources Center Technical Reports

With national interest focused on man’s ever increasing degradation of the waters in this nation, it is clearly evident that an accurate assessment of all parameters influencing water quality needs to be made. Moreover, nutrient levels and budgets reflecting eutrophication trends are important parameters in the overall factors effecting water quality in lakes and reservoirs. The ability to predict future eutrophication levels will greatly enhance the retardation of the eutrophication process. Through mathematical simulation of this process, eutrophication can be analyzed and intelligent decisions regarding water quality management can be made.

Population Studies Of The Desert Cottontail (Sylvilagus Auduboni) And Black-Tailed Jackrabbit (Lepus Californicus) In The Sonoran Desert, C.R. Hungerford, C.H. Lowe, R.L. Madsen

Memorandum

No abstract provided.

The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R I. Lynn, R E. Cameron

Memorandum

No abstract provided.

Special Purpose Models, D. Wilkin

Memorandum

No abstract provided.

Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, J Letey Jr, G R. Mehuys, L V. Weeks

Memorandum

No abstract provided.

Pine Valley Validation Site, C.D. Jorgensen, G. Richins

Memorandum

No abstract provided.

Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, G. R. Mehuys, L. H. Stolzy, J. Letey Jr., L. V. Weeks

Memorandum

No abstract provided.