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The Chemical Thermodynamic Properties of Hydrocarbons and Related Substances: The Use of n-Heptane as a Reference Substance for Low-Temperature Calorimetry

Description: From Introduction and Summary: "This bulletin presents the results obtained n-heptane by the petroleum thermodynamics laboratory of the Bartlesville, Okla., facility. Detailed results of five investigations are given; selected values if the low-temperature thermal properties are tabulated; and comparisons with results that were obtained in other laboratories are made. The findings of this extensive study will serve to characterize the low-temperature thermal data for over 100 compounds that will be presented in a later bulletin of this series."
Date: 1961
Creator: Griffith, F. E.; Magnuson, M. O. & Toothman, G. J. R.
Partner: UNT Libraries Government Documents Department

Chemical Thermodynamic Properties of Hydrocarbons and Related Substances: Properties of the Alkane Hydrocarbons, C1 through C10, in the Ideal Gas State From 0 to 1500 K

Description: From Introduction: "A compilation of chemical thermodynamic properties of the alkanes, based on this correlation, is given in this bulletin for all of the alkane isomers through C^10 for selected temperatures between 0 and 1500 K. It is intended to fulfill the need for an updated compilation mentioned in the previous paragraph."
Date: unknown
Creator: Scott, Donald W.
Partner: UNT Libraries Government Documents Department

Removal of the Lighter Hydrocarbons from Petroleum by Continuous Distillation: with Especial Reference to Plants in California

Description: From Introduction: "The purpose of this bulletin is to describe the methods of constructing and operating representative types in the United States used for removing the light hydrocarbons from petroleum by continuous distillation, such plants being commonly known in the trade as topping or skimming plants."
Date: 1919
Creator: Wadsworth, J. M.
Partner: UNT Libraries Government Documents Department

Polycyclic-Aromatic-Hydrocarbon-Induced Alterations in the Physio-Chemical Characteristics of Escherechia Coli Dexyribonucleic Acid

Description: Prior to 1965 the interactions of polycyclic aromatic hydrocarbons with DNA (Deoxyribonucleic acid) had been but moderately studied. It was concluded that, although a controversy existed, an apparent interaction occurred between DNA and certain aromatic hydrocarbon molecules and that the interaction was not an artifact of the reaction system.
Date: August 1969
Creator: Chapel, J. Frederick (James Frederick)
Partner: UNT Libraries

Infrared spectra of 47 dicyclic hydrocarbons

Description: From Summary: "The infrared spectra are presented for 47 dicyclic hydrocarbons consisting of some alkyldiphenylmethanes, alkyldicyclohexylmethanes, alkylnaphthalenes, alkyltetralins, 1,3-diphenyl-2-alkylpropanes and 1,3-dicyclohexyl-2-alkylpropanes. The physical properties of these highly purified compounds are included for reference purposes."
Date: June 1954
Creator: Lamneck, John H., Jr.; Hipsher, Harold F. & Fenn, Virginia O.
Partner: UNT Libraries Government Documents Department

Antiknock evaluation of hydrocarbons and ethers as aviation fuel components

Description: From Introduction: "The engine evaluation of blends reported herein was conducted at the NACA Lewis laboratory. The data contained in references 2 to 14 are therefore summarized and the effect of the molecular structure of fuels on antiknock performance is shown in herein."
Date: October 5, 1950
Creator: Barnett, Henry C
Partner: UNT Libraries Government Documents Department

Synthesis of cyclopropane hydrocarbons from methylcyclopropyl ketone 3: 2-cyclopropyl-1-butene, cis and trans 2-cyclopropyl-2-butene, and 2-cyclopropylbutane

Description: From Summary: "The hydrocarbons - 2-cyclopropyl-1-butene, cis and trans 2-cyclopropyl-2-butene, and 2-cyclopropylbutane - were obtained from methylcyclopropyl ketone by reacting the ketone with ethylmagnesium bromide, dehydrating the resultant methylethylcyclopropylcarbinol to a mixture of olefins from which 2-cyclopropyl-1-butene and cis and trans 2-cyclopropyl-2-butene were isolated, and hydrogenating the olefins to 2-cyclopropylbutane. All four hydrocarbons were obtained in high purity for the first time; their physical constants and infrared spectra are presented."
Date: June 1951
Creator: Slabey, Vernon A. & Wise, Paul H.
Partner: UNT Libraries Government Documents Department

Aviation Gasoline and its Component Hydrocarbons: Wartime Research (1940-45)

Description: From Scope and Plan: "As the table of contents indicates, the present report summarizes the important data obtained from the research on aviation gasoline during the period 1940-45, exclusive of the data on jet-propulsion fuels. The report is divided into an introduction giving the historical background for the work, two chapters, and an appendix. The first chapter presents the data in a series of 15 tables carefully cross-indexed and supplemented by 19 charts showing the composition of as many straight-run naphthas. The second chapter discusses in general the equipment, procedures, and methods used in the experimental work and is supplemented by illustrations when necessary."
Date: 1951
Creator: Smith, H. M.; Kraemer, A. J. & Thorne, H. M.
Partner: UNT Libraries Government Documents Department

The Chemical Thermodynamic Properties of Hydrocarbons and Related Substances: [Part] 2. Properties of 25 Organic Sulfur Compounds in the Ideal Gas State from O° to 1,000° K

Description: From Abstract: "Tables of chemical thermodynamic properties for the ideal gas state from 0 degrees to 1,000 degrees K are reported for eight alkanethiols, three cycloalkanethiols and arylthiols, six thiaalkanes, two dithiaalkanes, three thiacycloakanes, and three thiophenes. They are based on current physical and thermochemical constants and definitions, reliable vibrational assignments, and the latest insights into molecular structure and energetics."
Date: unknown
Creator: El-Sabban, M. Zaki & Scott, Donald W.
Partner: UNT Libraries Government Documents Department

Activation of hydrocarbons and the octane number

Description: This report presents an examination of the history of research on engine knocking and the various types of fuels used in the investigations of this phenomenon. According to this report, the spontaneous ignition of hydrocarbons doped with oxygen follows the logarithmic law within a certain temperature range, but not above 920 degrees K. Having extended the scope of investigations to prove hydrocarbons, the curves of the mixtures burned by air should then be established by progressive replacement of pure iso-octane with heptane. Pentane was also examined in this report.
Date: October 1939
Creator: Peschard, Marcel
Partner: UNT Libraries Government Documents Department

COMPOSITION AND STABILITY OF "ULTRASENE"

Description: "Ultrasene" typically contained 57 wt % branched paraffins and cycloparaffins, 40 wt% n-paraffins, 3 wt% aromatics, and less than 0.1 wt% olefins. The n-paraffinic fraction from "Ultrasene" was stable to chemical and radiolytic degradation, whereas the combined branched paraffinic and cycloparaffinic fraction, and the aromatic fraction, were significantly less stable. (auth)
Date: June 1, 1961
Creator: West, D. L.
Partner: UNT Libraries Government Documents Department

A Quenchofluorometric Study of Polycyclic Aromatic Hydrocarbons in Molecularly Organized Media

Description: Detection, identification and separation of polycyclic aromatic compounds in environmental samples are of extreme importance since many of these compounds are well known for their potential carcinogenic and/or mutagenic activities. Selective quenching of molecular fluorescence can be utilized effectively to analyze mixtures containing different polycyclic aromatic hydrocarbons. Molecularly organized assemblies are used widely in detection and separation of these compounds mainly because of less toxicity and enhanced solubilization capabilities associated with these media. Feasibility of using nitromethane and the alkylpyridinium cation as selective fluorescence quenching agents for discriminating between alternant versus nonalternant polycyclic aromatic hydrocarbons (PAHs) is critically examined in several molecularly organized micellar solvent media. Fluorescence quenching is used to probe the structural features in mixed micelles containing the various combinations of anionic, cationic, nonionic and zwitterionic surfactants. Experimental results provide valuable information regarding molecular interactions between the dissimilar surfactants.
Date: May 1998
Creator: Pandey, Siddharth
Partner: UNT Libraries

Preparation of flat dendrimers and polycyclic aromatic hydrocarbons connected via 1,3,5-triethynylbenzene core.

Description: Flat dendrimers, consisting of a hexavalent aromatic core and rigid ethynyl units locked in place by ether connections were developed based upon the divergent synthetic method. Alternating functional groups were adopted on each site of the hexa-substituted benzene, in order to avoid undesired cyclization pathways. The flat structures of conjugated dendrimers would allow investigation on the discotic liquid crystal properties. In addition, these ethylnyl dendrimers are expected to show directed energy and electron transfer with a highly conjugated system, and thus are effective in the preparation of photoreactive materials such as electronic sensors or light harvesting materials. Conjugated polycyclic aromatic hydrocarbons, consisting of naphthalene, anthracene, pyrene, and phenanthrene groups connected via 1,3,5-triethynylbenzene cores, were synthesized. These molecules exhibited luminescence properties and the π-complexation with a mercury trifunctional lewis acid are expected to enhance the phosphorescence in the presence of the heavy metal due to the spin-orbit coupling. Besides, owing to the presence of heavy metal atom in the Au (I) complexes linked by s-bonded triethynyltriphenylene luminophore, the phosphorescence occurs from a metal-centered emission. The conjugated organic luminophores have been developed to produce excellent quantum efficiencies, brightness, and long lifetimes.
Date: December 2008
Creator: Jung, Jiyoung
Partner: UNT Libraries

Polycyclic Aromatic Hydrocarbon Solute Probes: Effect of Solvent Polarity on the Ovalene and Benzo[ghi]perylene Fluorescence Emission Fine Structures

Description: Article on polycyclic aromatic hydrocarbon solute probes and the effect of solvent polarity on the ovalene and benzo[ghi]perylene fluorescence emission fine structures.
Date: 1988
Creator: Waris, Riaz; Rembert, Michael A.; Sellers, David M.; Acree, William E. (William Eugene); Street, Kenneth W.; Poole, Colin F. et al.
Partner: UNT College of Arts and Sciences