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A Study Of Some Complexometric Titrations In Nonaqueous Solvents, Ngo The Hung

Masters Theses

"Complexometric titrations of calcium, zinc and lead with polyaminocarboxylic acids: ethylenediaminetetraacetic acid (EDTA), 1,2-diaminocyclohexanetetraacetic acid (DCTA), ethyleneglycol-bis(2-aminoethylether)tetraacetic acid (EGTA) and tetraethylenepentamine (tetren) have been investigated and compared in the following organic solvents: methanol, dimethyl formamide, dimethyl sulfoxide and methyl ethyl ketone. Various end point detection methods have been used: direct visual titration with metallochromic indicators and instrumental detection by photometry, potentiometry (mercury electrode and lead ion selective electrode) and amperometry. Calcium, zinc and lead can be determined up to trace levels (ppm) under specific conditions. A concrete application of this thesis is the determination of zinc or calcium in a …

An Analysis And Annotated Bibliography Of Selected Books For Children About Negro Life, Dorothy L. Stevens

Masters Theses

No abstract provided.

Exploring The Role Of Various Education Strategies In National Economic Development, Donald F. Depew

Masters Theses

No abstract provided.

Report Of Internship Experiences, Richard V. Yenchesky

Masters Theses

No abstract provided.

An Experimental Study Of The Effects Of Classroom Photography On The Self-Concepts Of Culturally Disadvantaged Sixth Grade Students, Donald L. Wetmore

Masters Theses

No abstract provided.

An Experience With School Administration In The City Of Grand Rapids, Gerald L. Siegel

Masters Theses

No abstract provided.

A Study Of The Materials Used In The Teaching Of Reading By Teachers With And Without A Library-Media Center With A Full-Time Media Specialist, Mary Ann Paulin

Masters Theses

No abstract provided.

A Process Study: Developing An Elementary Language Arts Guide, Norma Korn

Masters Theses

No abstract provided.

Participation Of The Renin-Angiotensin System In The Control Of Vascular Capacity During Hemorrhagic Hypotension, James Robert Powell

Masters Theses

Introduction

Review of the Literature

Severe hypotension has long been held as being one of the most potent stimuli for activation·of the mechanisms responsible for circulatory homeostasis. It has been accepted that the most immediate response to hypotension involves activation of the autonomic nervous system causing an increased vascular tone. In addition to various neurogenic mechanisms that function to cause an increase in vascular tone, several humeral mechanisms have also been implicated.

Rocha e Silva and Rosenberg (1969) described the release of vasopressin (ADH) from the posterior lobe of the pituitary in response to hemorrhage in the dog. They postulated …

Change In Cysteine And Total Basic Amino Acid Contents In Regenerating Planaria, Lynn Gunnison

Masters Theses

No abstract provided.

A Report Of A Summer Internship At Buckhorn Children's Center Buckhorn, Kentucky, Catherine Smith Armitage

Masters Theses

No abstract provided.

Interest And Pupil Dilation: A Print Advertising Pre-Test, Roy Douglas Adler

Masters Theses

No abstract provided.

Peripheral Blood Changes In Canada Geese And The Reproductive Condition Of Three Michigan Flocks, William B. Potter

Masters Theses

No abstract provided.

Existentialism And The Freedom Theme, Kalmain D. Smith

Masters Theses

No abstract provided.

The Dynamics Of Figure Ground Relationships When The Ground Is Emphasized, Russell Dean Benjamin

Masters Theses

No abstract provided.

Canada: Developing A Unit Of Study For The Social Studies Curriculum Of The Junior High School, Patricia-Marie Green

Masters Theses

No abstract provided.

The Clinical Utility Of The Feature Finders, Nancy C. Keenan

Masters Theses

No abstract provided by author.

A Taxonomic Study Of The Coprophilous Ascomycetes Of Southeastern Illinois, Alan Douglas Parker

Masters Theses

No abstract provided.

A Social Studies Program Developed For Elementary Schools In Crete-Monee District 201-U, William Stewart Edmunds

Masters Theses

No abstract provided by author.

Pseudomonas As Causative Agents Of Fluorescence In Anguispira Kochi (Pfeiffer) Mucus, John Michael Baum

Masters Theses

The mucus from land snail specimens of Anguispira kochi collected from Coles and Edgar counties, Illinois, emits a blue fluorescence when exposed to ultra-violet light. Pseudomonas, a genus of bacteria which produces fluorescent pigments, has been isolated from the mucus of these snails. The object of the study was to compare the fluorescence of the mucus from individuals of A. kochi with the fluorescence of the pigments produced on a synthetic medium by pseudomonads isolated from the mucus of these snails. An effort was made to establish that Pseudomonas is the causative agent of fluorescence in the mucus of …

Interactions Between Selected Pigment Producing Bacteria Isolated From Sewage, Leslie Alexander Lakie

Masters Theses

"Pigmented bacteria have been of interest to the microbiologist for several years. The pigmented organisms in sewage have been known to gain predominance, but no investigations have been made to determine whether the pigment assists the organism in gaining predominance. During this study a number of bacteria which produced a water soluble pigment were isolated from sewage. These bacteria were grown in shaken flasks using tryptone Glucose extract broth as a medium. Growth studies of the bacteria in pure and mixed culture were performed to determine if the pigment could affect another bacteria's growth. Studies were also performed using the …

A Laboratory Study Of The Transmission Of Signals Through Solid Material With Possible Application To Seismic Communication, Ronald Willis Carter

Masters Theses

"The problem of transmitting acoustic signals through solid material channels is investigated using piezoelectric transducers for generation and detection of the signals. Laboratory experiments are performed in which a solid material channel is modeled by a block of Berea sandstone. The magnitude of the frequency response for the sandstone and transducer combination is obtained over the frequency range of approximately 0 Hz to 500 kHz. Various electrical waveforms are utilized as driving sources for the transmitting transducer. It is found that the best received waveform is obtained when a gated sinewave whose frequency is approximately equal to the resonant frequency …

Advanced Waste Treatment Of Industrial Waste Waters By Physicochemical Processes, Michael Gay Hardie

Masters Theses

"The primary objective of this investigation was to determine the general applicability of using physicochemical processes for treating different types of industrial wastes. Emphasis was placed on the evaluation of the treatment efficiency and the performance difficulties encountered in the treatment of each waste. Two types of waste were studied, one a high strength acidic industrial chemical waste and the other a petroleum refinery waste. The physicochemical system utilized included chemical coagulation and clarification plus activated carbon adsorption. Parallel operations of fixed-bed and expanded-bed carbon adsorbers were conducted. Treatment efficiencies were evaluated in terms of the removals of chemical oxygen …

Hydrothermal Alteration Of Ash-Flow Tuffs In The Indian Peak District Of Southwestern Utah, Michael Allan Tolley

Masters Theses

"Careful petrographic study of the ash-flow tuffs in the Indian Peak District of southwestern Utah reveals hydrothermal alteration around the fluorite veins. The alteration minerals themselves and the intensity of alteration vary with distance from the veins. Primary plagioclase has altered to secondary feldspar, calcite, sericite, and traces of epidote and zoisite. Hornblende and biotite have altered to chlorite, calcite, and secondary iron oxide, and traces of epidote and zoisite. Diopside has changed to calcite and secondary iron oxide. An overall picture of the mining district shows that certain minerals increase and others decrease as one nears the veins. Hydrothermal …

The Oxidative Decarboxylation Of Aminopolycarboxylic Acids With Cerium (Iv) In Sulfuric Acid, Rita Kathleen Hessley

Masters Theses

"The rates of oxidation of four chelating agents, NTA, EDTA CDTA, and DTPA with Ce(IV), in sulfuric acid media, were determined spectrophotometrically by a stopped-flow technique. The reductive ability is in the order CDTA>EDTA>DTPA>NTA. The influence of varying the acidity of the medium was studied, and in each case a maximum in the rate constant [H +] plot was observed. A possible interpretation of the reactivities and the influence of acidity is advanced"--Summary, page 1.

A Kinetic Study Of The Reductive Abilities Of Four Polyaminocarboxylic Acids (Edta, Cdta, Dtpa And Nta) Towards Cerium(Iv) In Perchloric Acid Media, Salem Ahmed Attiga

Masters Theses

"The reduction of Ce(IV) in HC10₄ solutions by four polyaminocarboxylic acids, which are commonly used as chelating agents, has been studied by the stopped-flow technique. The rates of reduction first increase with increasing acidity, reach maxima which are characteristic of the chelating agent and the medium, then progressively decrease with increasing the acid concentration in the media. At their maximum reactivities, trans-1,2-diaminocyclohexane tetraacetic acid (CDTA) shows the highest reductive ability; this is followed by ethylenedinitrilotetraacetic acid (EDTA), diethylenetriaminepentaacetic acid (DTPA), and finally nitrilotriacetic acid (NTA). The observed maxima can be qualitatively explained in terms of a mechanism which involves unhydrolyzed …

A Hardware And Software Interface Between A Graphics Terminal And The Scc 650 Computer, George Irvin Rhine Jr.

Masters Theses

"This paper describes the design of a digital interface between a graphic terminal and the SCC-650 computer. The graphic terminal-computer combination can be used as a stand alone system for small applications or can be used as a satellite processor for a larger system such as the IBM System 360, The interface is designed utilizing DTL NAND type integrated circuits. Its primary functions may be divided into three main categories: (1) to give level conversion, (2) control, and (3) data manipulation. All requests for data transfers are initiated by the computer, the interface then assumes a control mode which handles …

Two Component Heat Pipe, Surapol Chandsawangbhuvana

Masters Theses

"A two component heat pipe with water and ethanol as the working fluid was investigated at different angles of inclination and various ethanol concentration for two power loads. The heat pipe was 15 inches long and 0.75 inches in diameter with a 100 mesh stainless steel screen wick. The wall and the vapor temperatures were measured at different stations along the length of the heat pipe by copper-constantan thermocouples. The results were used to evaluate an existing model which includes the constraint of thermodynamic phase equilibrium of the solution on the governing equations. Based on the measured pressure and temperature …

El Quijote De Cervantes Y El Quijote De Avellaneda, Nohra Russi

Masters Theses

No abstract provided.

Comparative Nitrogen Nutrition Of Certain Fresh-Water Algae, William H. Culp

Masters Theses

No abstract provided.