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Full-Text Articles in Chemistry
The Synthesis Of Some Methyl Substituted 3,4-Benzpyrenes, Jules L. Adelfang
The Synthesis Of Some Methyl Substituted 3,4-Benzpyrenes, Jules L. Adelfang
Chemistry and Chemical Biology ETDs
3,4-Benzpyrene (I), a highly carcinogenic hydrocarbon was first isolated from coal tar in 1933 by Cook, Hewett, and Hieger. Interest in the relationship of structure to carcinogenic activity and correlation of physical properties with carcinogenic potency led to the synthesis of several monomethyl 3,4-benzpyrenes during the decade following the isolation of the parent hydrocarbon. Detailed reviews concerned with the various phases of this research have been prepared. Recently the synthesis of the 1-^2, 7-^3, 8-^(2,5), and 10-^4 methyl-3,4-benzpyrenes completed the series of reported monomethyl derivaives.
The Chemical Behavior Of Iodine At Tracer Concentrations, Henry Morris Eiland
The Chemical Behavior Of Iodine At Tracer Concentrations, Henry Morris Eiland
Chemistry and Chemical Biology ETDs
Radio-chemistry was introduced as a separate branch of chemistry by Pierre and Marie Curie in 1898. The first radio-chemical process consisted of the separation and identification of the new element Polonium from the uranium ores pitchblende and chalcalite. It is significant that this process involved an amount of material so small that it could be detected only by its intense radioactivity. In the last half-century radio-chemistry has developed into a field of ever increasing diversification.
A Study Of The Density And Molecular Species Of Polonium And Tellurium Vapor, Angelo L. Giorgi
A Study Of The Density And Molecular Species Of Polonium And Tellurium Vapor, Angelo L. Giorgi
Chemistry and Chemical Biology ETDs
The purpose of this investigation was to determine the nature of the species of polonium and tellurium in equilibrium in the vapor phase at temperatures ranging from 422 degrees to 1013 degrees C. for polonium and from 512 degrees to 880 degrees C. for tellurium. Such information was based on measurements of the variation of vapor pressure and vapor density with temperature. The results of this investigation suggest that both polonium and tellurium exist as diatomic molecules in the vapor phase over the aforementioned temperature ranges.
Studies Of The Chemistry Of Systems Involving Water, Hydrogen Peroxide And Plutonium (Iv) Nitrate In Tri-N-Butyl Phosphate, Lawrence J. Mullins Jr.
Studies Of The Chemistry Of Systems Involving Water, Hydrogen Peroxide And Plutonium (Iv) Nitrate In Tri-N-Butyl Phosphate, Lawrence J. Mullins Jr.
Chemistry and Chemical Biology ETDs
The reaction of tri-n-butyl phosphate (TBP), with water and hydrogen peroxide is studied by means of distribution experiments. The solubility of water in TBP-hexane, at low TBP concentrations, is consistent with the premise that H2O•TBP is the principal solvate species formed at low hydrogen peroxide concentrations. The distribution data at high hydrogen peroxide concentrations indicate that another species such as H2O2•TBP is also present.
A Radiochemical Investigation Of Short-Lived Selenium And Bromine Fission Products, James Edward Sattizahn Jr
A Radiochemical Investigation Of Short-Lived Selenium And Bromine Fission Products, James Edward Sattizahn Jr
Chemistry and Chemical Biology ETDs
From a sample of uranium bombarded with neutrons, Hahn and Strassmann, in 1939, separated four radioactive products which followed alkaline earth chemistry and were therefore tentatively attributed to isotope of radium. Each of these products decayed to a daughter activity which could be precipitated along with lanthanum; the daughter activities were then assumed to be isotopes of actinium. Subsequently, by accepted methods of fractional crystallization and precipitation, the "radium" and "actinium" isotopes were identified unequivocally as isotopes of barium and lanthanum, respectively. Within a relatively short time there were found more such radioactive products, which were identified as isotopes of …
Behavior Of Indium At Tracer Concentrations, Katheryn L. Lawson
Behavior Of Indium At Tracer Concentrations, Katheryn L. Lawson
Chemistry and Chemical Biology ETDs
The increase in number and availability of radioisotopes that can be produced in the carrier-free state has offered practical means of investigating the chemical behavior of substances at extremely low concentrations. The working region of concentrations, which may extend to less than 10-14 molar, is generally fixed only by the half-life of the radio-element and the nature of the radiation.
The Exchange Of Chlorine Between Hydrogen Chloride And Acetyl Chloride In The Vapor Phase, Warren J. Niell
The Exchange Of Chlorine Between Hydrogen Chloride And Acetyl Chloride In The Vapor Phase, Warren J. Niell
Chemistry and Chemical Biology ETDs
The aim of chemical kinetics is to predict the rates of chemical reactions, to determine the factors influencing the reaction rate, and to postulate a suitable reaction mechanism.
The Chemical Effects Of Gamma Radiation On Halogenated Methanes, Clifford G. Shultz
The Chemical Effects Of Gamma Radiation On Halogenated Methanes, Clifford G. Shultz
Chemistry and Chemical Biology ETDs
At its inception, the present work was to consist of testing a number of halogenated organic compounds for sensitivity to radiation. Some of the compounds which showed a relatively high sensitivity to radiation were to be investigated more thoroughly with a view toward a) the development of a sensitive radiation detection device and b) elucidation of the reactions involved in the radiolytic decomposition of the compounds. Some screening had already been done and several systems involving chloroform, bromoform and carbon tetrachloride had been investigated and their results reported. The experiments on the chloroform- and bromoform- crystal violet systems showed a …