Physical Sciences and Mathematics Commons^™

The Effect Of Ferrous And Ferric Ions On The Conversion Of Malate To Pyruvate By A Cell Free Extract Of Pigeon Liver, Keith Erwin Richardson

Theses and Dissertations

Recent investigations on the crude pigeon liver extracts have shown the presence of an enzyme which catalyzes the oxidative decarboxylation of malate to pyruvate and carbon dioxide. The name malic enzyme has been given to this enzyme to distinguish it from malic dehydrogenase. Under aerobic conditions the addition of ferrous sulfate resulted in inhibition of the action of malic enzyme. Subsequent investigation showed that the inhibition obaerved was not due to ferrous ions, but due to ferric ions which were contaminating the ferrous sulfate. It was also shown that under aerobic conditions ferrous ions were rapidly oxidized to ferric ions. …

A Study Of The Chelation Of 1,3-Bis-(Tris-(Hydroxymethyl)-Methylamino)-2-Propanol Dihydrochloride With Copper (Ii), Nickel (Ii), Cobalt (Ii), Velta Erdmanis

Master's Theses

In this study 1,3-bis-(tris-(hydroxymethyl)-methyl­ amino)-2-prapanol dihydrochloride chelates with calcium, manganous, cobaltous, nickelous, cupric and zinc ions were investigated.

Potentiometric titrations were performed to obtain information about the stability of the chelates formed. Calcium and manganous ions showed little chelating ability. Cobaltous, nickelous, cupric and zinc ions formed stable chelates when the ratio of the chelating agent Concentration to the metal ion concentration was 1:1 or larger.

Job 's method of continuous variations was used for determining the composition of the cupric, nickelous and cobaltous chelates and it was found that these metal ions form a 1:1 chelate with l,3-bis-(tris-(hydroxymethyl)­ methyl …

A Study Of The Chelation Of 1,3-Bis (Tris (Hydroxymethyl) Methylamino) 2-Propanol With Iron (Iii), Jane Bell Grinnan Gladding

Master's Theses

The element Iron is so important that a major era of history bore its name. Its magnetic and metallic properties have long been studied and used. It is also well known that iron. is the cental element in the oxygen-carrying compound hemo­ globin and therefore essential to life. Its biological importance is also evidenced by its presence in the cytochrome oxidases . These important biochemical compounds are iron chelates

Fundamental research with iron chelates may therefore shed light on the operations of certain enzyme systems, drugs and poisons. Analytical chemistry and the dye industry have used chelate compounds for many …

Yeni̇ Neşri̇yat, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Géologie Détaillée De La Structure Pétrolière De Kişlaköy (İskenderun - Hatay), Cahit Erentöz

Bulletin of the Mineral Research and Exploration

No abstract provided.

Beziehungen Zwischen Der Anatolischen Und Der Sudosteuropaeischen Metallprovinz, Walter E. Petrascheck

Bulletin of the Mineral Research and Exploration

No abstract provided.

Beziehungen Zwischen Der Anatolischen Und Der Sudosteuropaeischen Metallprovinz, Melih Tokay

Bulletin of the Mineral Research and Exploration

No abstract provided.

Yeralti Jeoloji̇si̇ Laboratuvarlari Hakkinda, Mehlika Taşman

Bulletin of the Mineral Research and Exploration

No abstract provided.

Dünya Demi̇r Ve Çeli̇k İsti̇hsali̇ İçi̇n Demi̇r Cevheri̇ni̇n Ve Kömür Rezervleri̇ni̇n Yeterli̇ği̇, Sehavet Mersi̇noğlu

Bulletin of the Mineral Research and Exploration

No abstract provided.

Mining Activities In Turkey, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Dünya Petrol Haberleri̇, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Maden Pi̇yasasi, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Die Uranlagerstaetten Der Welt, Ihre Besonderheiten Und Ire Wirtschaftliche Bedeutung, F. Schumacher

Bulletin of the Mineral Research and Exploration

No abstract provided.

Les Variations Rapides Du Champ Magnetique Et Des Courants Telluriques Leurs Appli̇cati̇ons Possi̇bles À La Prospecti̇on Géophysi̇que, J. Coulomb

Bulletin of the Mineral Research and Exploration

No abstract provided.

A Study On The Concentration Tests And Beneficiation Of The Uludağ Tungsten Ore, Raşit Tolun

Bulletin of the Mineral Research and Exploration

No abstract provided.

Dünya Maden Haberleri̇, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Petrolün Katali̇ti̇k Kraki̇ngi̇, Mustafa Soli̇m

Bulletin of the Mineral Research and Exploration

No abstract provided.

Neue Beitraege Zur Geologie Chromerz Führender Peridotitserpentine Des Südanatolischen Taurus, Gustav Hi̇esslei̇tner

Bulletin of the Mineral Research and Exploration

No abstract provided.

Activities Of The M. T. A. Institute During 1953-1954, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Ein Beitrag Zur Meerschaumfrage, Günter Zeschke

Bulletin of the Mineral Research and Exploration

No abstract provided.

M.T.A. Neşri̇yati, - -

Bulletin of the Mineral Research and Exploration

No abstract provided.

Report Of The State Geologist 1953-1954, Maine Geological Survey

Maine Collection

Report of the State Geologist 1953-1954.

Maine Geological Survey - Maine Development Commission, Augusta, Maine - July 1955.

Contents: Joseph M. Trefethen -- Review of Maine Mineral Outlook / Henry W. Allen -- Limestone Investigations, 1953-54 / Wm.T. Forsyth -- Airbourne Magnetometer Survey in Eastern Maine / Gary M. Boone -- Petrology of the Farmington, Maine Area / Joseph M. Trefethen, Henry Allen, and Wm. T. Forsyth -- Scheelite Occurrences in Maine / Wm.T. Forsyth -- Beneficiation Tests on the Warren Sillimanite Gneiss / Wm. T. Forsyth -- Pyrrhotite Mineralization at Iron Hill, Gardiner, Maine / Joseph M. Trefethen -- …

Colorimetric Determination Of Rhenium In Ores, Clair Winston Rogers

Theses and Dissertations

The problem of colorimetrically determining rhenium in the presence of molybdenum, copper, iron, sulphur, and rare earth elements with the use of dimethylglyoxime as the complexing compound was accomplished by the method reported here-in. The interfering elements were eliminated either as gaseous oxides and sulfides or were precipitated from a highly basic solution by means of a strong alkaline fusion of equal weights of sodium hydroxide and sodium peroxide, and the ore sample containing rhenium. The fusion product was dissolved in water, the solution boiled with a slight excess of sodium peroxide, and the hydroxide of all the interfering ions …

The Numerical Treatment Of A Simple Hydrodynamical Shock By The Von Neumann-Richtmyer Method, Charles F. Sprague Iii

Mathematics & Statistics ETDs

When the differential equations describing the flow of compressible fluids are derived under the assumptions that (1) forces in the fluid are due only to variations in pressure and (2) that the entropy of any volume element remains constant, it can be shown mathematically that these differential equations cannot have continuous solutions under all circumstances. If we adopt the notion of “shock discontinuities” in these solutions, the differential equations describing the flow in continuous regions together with conditions expressing the laws of conservation across the discontinuities suffice to completely determine the flow. An alternative procedure is to use a method, …

Geology Of The Southern Part Of The Fra Cristobal Range, Sierra County, New Mexico, Samuel Thompson Iii

Earth and Planetary Sciences ETDs

Emphasis has been placed in this work on the structural features of the southern part of the Fra Cristobal Range in order to extend the studies in the Caballo Mountains area and the McRae Canyon area. By mapping in detail the structure of the Fra Cristobal range it is hoped that a better understanding of the adjoining Rio Grande and Jornada del Muerto depressions may be reached. As an added contribution, a Permian section was measured as these rocks are relatively undeformed and very well exposed in some parts of the range.

The field mapping was done in the spring …

Classification Of Oligocene Sediments In Nebraska: A Guide For The Stratigraphic Collecting Of Fossil Mammals, C. Bertrand Schultz, Thompson M. Stout

Bulletin of the University of Nebraska State Museum

The Chadron and Brule formations constitute the White River Group in Nebraska and adjacent states. The Brule is divided into the Orella and Whitney members. The latter members are referred to the Medial and Late Oligocene (equivalents of the European Stampian and Aquitanian), while-the Chadron is equated with the Early Oligocene (Sannoisian). Each unit in Nebraska is subdivided into three parts (Lower, Middle, and Upper; or A, B, and C for the Chadron and Whitney, and A-B, C, and D for the Orella). Key beds such as fossil soils (paleosols), Purplish White beds, and volcanic ash layers, when considered with …

The Hofmann Degradation Of Oxamide And Urea, Carmen Michael Cusano

Honors Theses

An amide may be degraded to an amine using the Hofmann reaction. The theoretical product of the Hofmann reaction of oxamide is hydrazine. The objective of this project was the production of hydrazine from oxamide. Since hydrazine could not be obtained from oxamide, an extensive study was made of the production of hydrazine from urea. It was hoped that the background gained in the study of the urea reaction could be applied to the original problem, i.e. the formation of hydrazine from oxamide. However, even with this background, no hydrazine was obtained from oxamide.

Radially Banded Precipitates In Gels, Robert Patrick De Sieno

Honors Theses

The formation of a rhythmic band structure known as Liesegang rings, when silver ions diffuse into gelatin containing chromate ions is a well-known phenomenon. The object of this research project is to make a detailed study of another diffusion phenomenon obtained in the presence of mercury vapor. The emphasis of this thesis is on the quantitative aspect. The author has been concerned with the cause and composition of radial lines produced when silver ions diffuse through chromated gelatin in the presence of mercury vapor. A number of variables related to this project, such as length of reaction time, concentration and …

Electrodeposition And Cathode Potential, Roland Francis Dapo

Honors Theses

The objective of electrodeposition and control of cathode potential is the qualitative and quantitative separation of metals from their solutions. It involves the problem: (1) measuring the cathode potential in relation to the solution in order selectively to plate any metal; (2) means of treating the solution to prevent the plating of more than one metal at any particular cathode potential. The present research involved the curve of cathode potential versus copper concentration, the designing and constructing of electronic units for automatic control, and the determination of voltage error in passing current through the saturated calomel electrode.

A Study Of The Effect Of Additives On Portland Cement, Sidney Gray Dunbar

Honors Theses

First, hydration tests were made on cement samples containing various percentages of Sodium Methyl Siliconate and Sodium Silicate. It was decided that it would be easier to determine what effect an additive would have upon concrete, if concrete blocks were actually made. Therefore, many blocks were made containing different amounts of various additives. Some of the concrete blocks were cut into cubes and slabs. The cubes were tested for their compressive strength. The slabs were tested for their resistance to corrosion from hydrochloric, acetic, and lactic acids. Some slabs were coated with certain substances to see if the coatings would …