Physical Sciences and Mathematics Commons^™

The Synthesis Of 1-Methyl-3,4-Benzpyrene, 8-Methyl-3,4-Benzpyrene And 1,8-Dimethyl-3,4-Benzpyrene, William Carter Doyle

Chemistry and Chemical Biology ETDs

The search for the carcinogenic factor present in crude oil tar fractions was begun around 1915. With the observation that the high-boiling, most carcinogenic fractions exhibited fluorescence spectra similar to those of many polycyclic aromatic hydrocarbons, several synthetic hydrocarbons were tested (1) on mice by skin painting techniques. Tumors were produced by 1,2,5,6-dibenzanthracene (I), 3'-methyl-1,2,5,6-dibenzanthracene (II) and 6-isopropyl-1,2-benzanthracene (III). One of the most widely used synthetic hydrocarbon carcinogens at the present is 1,2,5,6-dibenzanthracene.

Preparation Of Several Lactams And Correlation Of Their Structure With Their Infrared Spectra, Kenneth Curtiss Heckeler

Honors Theses

Simple amides are neutral compounds with infrared absorptions characterized by a strong carbonyl absorption. N-H absorptions, and other less significant and unassigned absorptions. Lack of basic nature of amides has been attributed to strong resonance of the unshared pair of electrons on nitrogen with the C=O double bond. This stabilized the molecule to an extent not possible when the electron pair on nitrogen is protonated, since resonance stabilization of such an ammonium structure is no longer possible.

Long Range Data (1955), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Odor Report (1955), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Addition Of Sodium Nitrate (1955), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Analytical Data (1955), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Special Projects (1955), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Press Reports (1955), Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Test 569: Ford 960, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear. This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker ,point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated. BELT HORSEPOWER TESTS TEST B: The throttle …

Test 563: Allis-Chalmers Wd-45 Diesel, Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT: Allis-Chalmers WD-45 Diesel TEST A: The manufacturer's representative operates the tractor for a minimum of 12 hours using light to heavy drawbar loads in each gear. This serves as a period for limber up, general observation and adjustments. Adjustments that are permissible include valve tappet clearance, breaker, point gap, spark plug gaps, clutch and others of a similar nature. No new parts or accessories can be installed without having mention made of it in the report. No data' are recorded during this preliminary run except the time that the engine is operated. BELT HORSEPOWER TESTS TEST …

Relation Of Nebraska Water-Level Measurements Made In 1955 To Median Water-Level Position, E. C. Reed

Conservation and Survey Division

No abstract provided.

Some Aspects Of The Chemistry Of The Hydroquinoxalines Unsubstituted On The Nitrogen Atoms, Evan L. Allred

Theses and Dissertations

A search of the literature revealed that almost nothing is known concerning the class of compounds known as decahydroquinoxalines. Since this posed a problem involving a search for a systematic synthetic method of general application as well as a method for establishing the characteristic class and individual properties, a research project under the guidance of Dr. H. Smith Broadbent was initiated. Of particular interest aside from matters of purely chemical interest was the recognition that the hydroquinoxalines possess obvious structural similarities with atropine and other well-known drugs which have valuable application as hypotensive agents, analgesics, spasmolytic agents, parasympathetic depressants, antihistaminics, …

Acidic Properties Of Clay Minerals And Alumina, Kenneth H. Anderson

Theses and Dissertations

Acidic properties of dialyzed alumina and representative clay minerals were studied by performing titrations with various bases. For the first group of experiments the titrations were made in a water system using KOH and NaOH. For this study in a water system the experimental data includes individual cationic activities as well as pH values. Adsorption of the cations was adequately described over a pH range of 5-11 by the equation 1-θ/θ ⋅ aNa+ ⋅ aOH- = 1/K'3 [aOH- + KW/K'2 + 1/K'1], in which θ represents the fraction of the total sites that have reacted. Thermodynamic constants K'3 and K0= …

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.

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 …

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.