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Articles 5131 - 5160 of 5292
Full-Text Articles in Entire DC Network
Preparation Of O-Fluorobenzoic Acid. An Elementary Organic Laboratory Experiment, Frank L. Setliff
Preparation Of O-Fluorobenzoic Acid. An Elementary Organic Laboratory Experiment, Frank L. Setliff
Journal of the Arkansas Academy of Science
An experiment designed for organic chemistry students at the sophomore level is presented. The experiment, which involves no special equipment and which employs only inexpensive reagents, demonstrates the conversion of anthranilic acid to o-fluorobenzoic acid via the modified Schiemann Reaction.
Consideration Of Macro-Climatic And Macro-Biotic Change In The Ozark Highlands During Post-Glacial Times, Kenneth W. Cole
Consideration Of Macro-Climatic And Macro-Biotic Change In The Ozark Highlands During Post-Glacial Times, Kenneth W. Cole
Journal of the Arkansas Academy of Science
Climatological, pedological and faunal investigations conducted in the Upper Midwest and the Ozark Highlands indicate that the environment to which man in the Ozarks was adapting over the past 12,000 years has undergone several major shifts, beginning with a cool-moist boreal forest situation followed by a period of warming and aridness resulting in prairie and deciduous forest climaxes and subsequently, in the last 4000-5000 years, change to the pattern reflected by present conditions.
Proceedings Of The Arkansas Academy Of Science - Volume 25 1971, Academy Editors
Proceedings Of The Arkansas Academy Of Science - Volume 25 1971, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Physics And Environmental Studies, Joe M. Guenter
Physics And Environmental Studies, Joe M. Guenter
Journal of the Arkansas Academy of Science
To further implement the course curriculum for the Earth Science major and to constructively channel the current interest and concern with the environmental problems, the Department of Physical Science at the University of Arkansas at Monticello introduced a course entitled Environmental Studies this past spring. As it was necessary to offer both a general education Elementary Physics course in addition to the new course, it was decided to combine the two courses and use an approach similar to that of Edwin Marston, Queens College, Flushing, New York. Problems of conservation, pollution, and environmental quality were considered by the class whose …
Digital Systems For On-Site Collection For Water Quality Analysis, M. K. Testerman
Digital Systems For On-Site Collection For Water Quality Analysis, M. K. Testerman
Arkansas Water Resources Center Technical Reports
A prototype system has been developed for recording and transmitting digital data at a remote water quality monitoring station in an unattended manner. As many as eight analog signals from transducers, which measure water quality characteristics such as dissolved oxygen, temperature, pH, chlorides, conductivity, redox, and turbidity, are converted to digital signals and recorded in binary coded decimal format on magnetic tape. This unit may be contacted from a central station for playback of the day's recording. The transmitted data can be recorded at the central station by teletype. Each data record includes a time-of-day "word" so that all data …
A Theory Of Formal Organization And Its Acceptance By The Business Practitioner, Edgar Thomas Busch
A Theory Of Formal Organization And Its Acceptance By The Business Practitioner, Edgar Thomas Busch
Graduate Theses and Dissertations
Formal organization theory has evolved from the traditional school of thought through the scientific management and behavioral schools and into what is currently called open system theory. In spite of voluminous writing by the academician, no school of thought or no theory has been universally accepted. This may be due to the failure to consult the businessman who interprets and applies theoretical concepts to the practical situation. The purpose of this study was to help clear the theory jungle by determining the extent to which a sample of business practitioners agreed with basic factors of a comprehensive theory of formal …
Distribution Of Trace Elements In Impoundments, J. Nix
Distribution Of Trace Elements In Impoundments, J. Nix
Arkansas Water Resources Center Technical Reports
An investigation of the trace element content of two impoundments on the Ouachita River, Arkansas, was conducted. Common water quality parameters were followed in the reservoirs in an effort to determine the factors which were influencing the trace element concentration. The following trace metals were determined in both the particulate phase (retained by a 0.45 micron filter) and the soluble phase (passed by a 0.45 micron filter): iron, manganese, copper, cobalt, nickel, lead, chromium, and zinc. These measurements were made periodically for one and a half years. Results indicate that the chemical regime of the impoundments which were studied was …
Water Resources Planning Study For Arkansas And Oklahoma, L. R. Heiple, H. M. Jeffus
Water Resources Planning Study For Arkansas And Oklahoma, L. R. Heiple, H. M. Jeffus
Arkansas Water Resources Center Technical Reports
The purpose of this study is to make an appraisal of the local water resources in the Arkansas River Basin common to the two States of Arkansas and Oklahoma as defined by the Arkansas-Oklahoma Compact Committee (hereinafter referred to as "the Compact Committee"). A review, analysis, and correlation has been made of hydrologic data previously collected by others. Consideration is given to the evaluation at selected sites of the storage and potential use of existing water sources.
54th Annual Meeting, 1970. Abstracts Of Papers, Academy Editors
54th Annual Meeting, 1970. Abstracts Of Papers, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Undergraduate Research Program In Chemistry At Philander Smith College, James O. Wear
Undergraduate Research Program In Chemistry At Philander Smith College, James O. Wear
Journal of the Arkansas Academy of Science
No abstract provided.
Simple Algebraic Extensions And Characteristics Polynomials, Don Stokes
Simple Algebraic Extensions And Characteristics Polynomials, Don Stokes
Journal of the Arkansas Academy of Science
No abstract provided.
Optical Phenomena In Diatoms, Richard B. Hoover, Miriam J. Hoover
Optical Phenomena In Diatoms, Richard B. Hoover, Miriam J. Hoover
Journal of the Arkansas Academy of Science
Diatoms are unicellular algae which fabricate siliceous shells that are frequently marked with intricate ornamentations and patterns. The nature and characteristics of the siliceous shells provide a basis for diatom taxonomy and give rise to a number of interesting and colorful optical phenomena. This paper presents the results of investigations of diffraction phenomena, complementary color behavior, Rayleigh scattering and optical activity in diatoms.
Eddy Bluff Shelter Of Beaver Reservoir Of Northwest Arkansas, James D. Morrison
Eddy Bluff Shelter Of Beaver Reservoir Of Northwest Arkansas, James D. Morrison
Journal of the Arkansas Academy of Science
No abstract provided.
54th Annual Meeting, 1970. Program, Academy Editors
54th Annual Meeting, 1970. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Proceedings Of The Arkansas Academy Of Science - Volume 24 1970, Academy Editors
Proceedings Of The Arkansas Academy Of Science - Volume 24 1970, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Apparatus For Dielectric Constant Measurements And Measurements For Water-Methanol Mixtures, James O. Wear
Apparatus For Dielectric Constant Measurements And Measurements For Water-Methanol Mixtures, James O. Wear
Journal of the Arkansas Academy of Science
A system for measuring dielectric constants has been constructed using a Sargent Oscillometer and an air bath for temperature control. The design and construction of the air bath as well as the temperature control achieved with it are described. The overall performance of the system including a computer program for forming the calculations is described. The system is one that requires calibration using two or more standard solvents and is good for both conducting and non-conducting liquids. Data are presented for water-methanol mixtures at 25 degrees with several points near pure methanol and also near pure water
Virus Movement In Groundwater Systems, William A. Drewry
Virus Movement In Groundwater Systems, William A. Drewry
Arkansas Water Resources Center Technical Reports
The purpose of this study is to investigate the extent to which soil acts as an agent in the transmission of waterborne viruses. Since many waterborne outbreaks of viral diseases have involved small wellwater supplies contaminated by effluents from subsurface wastewater disposal systems, there is a great need for such information. Results of this study show that virus adsorption by soils is greatly affected by the pH, ionic strength, and soil-water ratio of the soil-water system and various soil properties. Also, it is shown that one cannot predict the relative virus adsorbing ability of a particular soil based on the …
Subsurface Irrigation Research In Arkansas, John P. Hoskyn, Billy B. Bryan
Subsurface Irrigation Research In Arkansas, John P. Hoskyn, Billy B. Bryan
Arkansas Water Resources Center Technical Reports
A pilot study conducted in 1963 indicated that (1) cotton yields could be increased by subirrigation, (2) drilled orifices were unsatisfactory because of internal plugging caused by burrs and drilling particles, and (3) operating pressures of 5 and 10 psi were excessive, and 5 psi probably should be considered as an upper-limit pressure. A greenhouse study of a subirrigation system indicated that 2 psi should, in general, for in-wall orifices, be considered as a lower-limit pressure when orifices are built into the pipe wall. The greenhouse study also indicated that a placement depth of 12 inches was preferable to 18 …
On The Preparation And Properties Of Some 1,1-Dipheneyl-Syn,Trans-Truxane Derivatives, Frank L. Setliff
On The Preparation And Properties Of Some 1,1-Dipheneyl-Syn,Trans-Truxane Derivatives, Frank L. Setliff
Journal of the Arkansas Academy of Science
No abstract provided.
Arkansas Academy Of Science Proceedings - Volume 23 1969, Academy Editors
Arkansas Academy Of Science Proceedings - Volume 23 1969, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Middle Archaic Complex Of Northwest Arkansas, Michael A. Beckman
Middle Archaic Complex Of Northwest Arkansas, Michael A. Beckman
Journal of the Arkansas Academy of Science
No abstract provided.
Exact Test For Simple Correlation In Analysis Of Dispersion, James E. Dunn
Exact Test For Simple Correlation In Analysis Of Dispersion, James E. Dunn
Journal of the Arkansas Academy of Science
No abstract provided.
Biostratigraphy Of The Morrow Group Of Northern Arkansas, James Harrison Quinn
Biostratigraphy Of The Morrow Group Of Northern Arkansas, James Harrison Quinn
Journal of the Arkansas Academy of Science
No abstract provided.
53rd Annual Meeting, 1969. Program, Academy Editors
53rd Annual Meeting, 1969. Program, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Implications Of Land And Fresh-Water Gastropods In Archeological Sites, John W. Clark Jr.
Implications Of Land And Fresh-Water Gastropods In Archeological Sites, John W. Clark Jr.
Journal of the Arkansas Academy of Science
No abstract provided.
Biostratigraphy Of Peccary Cave, Newton County, Arkansas, Lee Carson Davis
Biostratigraphy Of Peccary Cave, Newton County, Arkansas, Lee Carson Davis
Journal of the Arkansas Academy of Science
No abstract provided.
Arkansas Academy Of Science Proceedings - Volume 22 1968, Academy Editors
Arkansas Academy Of Science Proceedings - Volume 22 1968, Academy Editors
Journal of the Arkansas Academy of Science
No abstract provided.
Heterocyclic Aromatic Fluorides By A Modified Schiemann Method (1), Frank L. Setliff
Heterocyclic Aromatic Fluorides By A Modified Schiemann Method (1), Frank L. Setliff
Journal of the Arkansas Academy of Science
No abstract provided.
Osagean Trilobites In Arkansas, John D. Taylor
Osagean Trilobites In Arkansas, John D. Taylor
Journal of the Arkansas Academy of Science
No abstract provided.
Arkansas Trilobite From Lower Ordovician Rocks, John D. Taylor
Arkansas Trilobite From Lower Ordovician Rocks, John D. Taylor
Journal of the Arkansas Academy of Science
No abstract provided.