Browsing Citations Only by Issue Date
Now showing items 21-40 of 990
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Ionic addition mechanism investigation. Determination of deuterated nortricyclyl alcohol stereochemistry
(The American Chemical Society: The Journal of Organic Chemistry, 1973-02-09) -
Reactions of hydrogen atoms and hydroxyl radicals with hydrogen bromide
(The American Chemical Society: The Journal of Physical Chemistry, 1973-04-12)A fast discharge-flow system was used to study reactions of hydrogen atoms and hydroxyl radicals with hydrogen bromide at 295 K. The reactions were followed by monitoring the epr spectra of H(2S1/2), Br(2P3/2), and OH(2pi3/2) ... -
Reaction of atomic oxygen with hydrogen bromide
(The American Chemical Society: Journal of Physical Chemistry, 1973-04-26)The reaction of atomic oxygen with HBr was studied in a fast discharge flow system by monitoring epr spectra of O(3P2), Br(2P3/2), OH(2pi3/2), and H(2S1/2) at various reaction times. The experimental results were found to ... -
Reactions of hydroxyl radicals with some hydrogen halides
(The American Chemical Society: The Journal of Physical Chemistry, 1973-08-02)The reactions of OH with HCl and HI have been studied in a fast flow system. Hydroxyl radicals were generated by NO2 titration of atomic hydrogen, and concentrations of OH, Cl , and I were determined at various reaction ... -
Analyses of polychlorinated biphenyls in bird tissues and aroclor standards with gas chromatography and mass spectrometry
(Springer-Verlag: Bulletin of Environmental Contamination and Toxicology, 1974-02) -
A gas chromatographic-mass spectrometric comparison of polychlorinated biphenyl residues in the Japanese quail brain to an Aroclor standard
(Springer-Verlag: Bulletin of Environmental Contamination and Toxicology, 1974-04) -
A Summary of recent satellite time transfers from the U.S. Naval Observatory to the Royal Greenwich Observatory and to Australia
(The Institute of Electrical and Electronics Engineers (IEEE), 1974-12)This paper describes the TIMATION II satellite time transfer experiments between the U.S. Naval Observatory (USNO) and the Royal Greenwich Observatory (RGO) in 1972, and between the U.S. and Australia, in 1973. The error ... -
The total synthesis and anti-fertility activity of 6-silasteroids
(Elsevier: Tetrahedron, 1975)4,4-Dimethyl-6-methoxy-4-sila-1-tetralone (2) was prepared by a modified literature procedure and converted to 3-methoxy-6,6-dimethyl-6-silaestra-1,3,5(10),8,14-pentaen-17β-yl acetate (5c). Catalytic hydrogenation of 5c ... -
Electrochemical generation of stable arene metal tricarbonyl dianions
(The American Chemical Society, 1975) -
Nonlinear optimization; some applications to colorant formulations
(The Optical Society of America, 1975-06) -
The Esterolytic activity of poly(1-methyl-4- and -5-vinylimidazole) in water
(American Chemical Society: Macromolecules, 1975-07)The water solubility of poly(1-Me-5-VIm) has made it possible to achieve phenomenal rate enhancements and to gain even greater insight into the mechanism of catalysis by polymeric imidazoles. The poly(l-Me-5-V1m)-catalyzed ... -
The Esterolytic activity of poly(N-alkylimidazoles) in ethanol-water. The poly(1-methyl-5-vinylimidazole)-catalyzed hydrolysis of p-nitrophenyl acetate and 3-nitro-4-acetoxybenzoic acid
(American Chemical Society: Macromolecules, 1975-07)1-Methyl-4-vinylimidazole (1-Me-4-VIm) and 1-methyl-5-vinylimidazole (1-Me-5-VIm) have been synthesized and polymerized. The esterolytic activity of these polymers in 28.5% ethanol-water toward p-nitrophenyl acetate (PNPA) ... -
The Esterolytic activity of poly(N-alkylimidazoles). The effect of ester chain length in the substrate and alkyl chain length in the catalyst on the esterolytic activity of poly(N-alkylimidazoles).
(American Chemical Society: Macromolecules, 1975-07)In an effort to exploit the enhancement in catalytic activity which might be derived through hydrophobic interactions between polymeric catalyst and substrate, 1-methyl-5-vinylimidazole (l-Me-5-VIm), l-methyl-4-vinylimidazole ... -
Stereochemistry and mechanism of ionic cyclopropane ring cleavage by arenesulfenyl chloride addenda in quadricyclene systems
(The American Chemical Society: The Journal of Organic Chemistry, 1975-10-17)Addition of benzenesulfenyl chloride to quadricyclenedicarboxylic acid (la) and to the corresponding dimethyl ester (1b) gave adducts [exo-5-chloro-endo-3-phenylthiotricyclo[2.2.1.0^2,6]heptane-2,exo-3-dicarboxylic acid ... -
Palladium/hydrogen catalyzed alcoholysis of benzylsilanes
(Elsevier: Journal of Organometallic Chemistry, 1976)Certain benzylsilanes are converted to methoxy or ethoxysilanes and toluene when treated with methanol or ethanol in the presence of hydrogen and catalytic amounts of palladium on charcoal. The reaction is promoted by a ... -
Salt excretion in a beach lizard (Ameiva quadrilineata, Teiidae)
(Springer: Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, 1976-01)The teiid lizardAmeiva quadrilineata has a nasal salt gland that responds to NaCl loading by increasing excretion of Na+ (from 1.12 to 2.63 uM/100 gh), K+ (from 0.14 to 2.43 uM/100 gh), and Cl– (from 1.10 to 5.47 uM/100 ... -
The role of fatigue in temperature resistance of salamanders
(Elsevier: Journal of Thermal Biology, 1976-04)1. We measured temperature resistance and lactic acid production of Notophthalmus viridescens and Plethodon cinerus acclimated to 10, 20 or 30°C. 2. Fatigue is responsible for the Loss of Righting Response (LRR) observed ... -
Acid precipitation and embryonic mortality of spotted salamanders, Ambystoma maculatum
(American Association for the Advancement of Science: Science, 1976-04-02)Spotted salamanders breed in temporary pools formed in early spring by melted snow and rain. Many of these pools reflect the low pH of precipitation in the northeastern United States. Egg mortality is low (less than 1 ... -
Evidence for sequence preferences in the intercalative binding of ethidium bromide to dinucleoside monophosphates
(Elsevier: Journal of Molecular Biology, 1976-09-16)The formation of solution complexes of ethidium bromide with the self-complementary ribodinucleoside monophosphates, as well as ethidium complexes with mixtures of complementary and non-complementary ribodinucleoside ... -
Voltammetric behavior of poly(vinylferrocene)
(Wiley: Journal of Polymer Science: Polymer Chemistry Edition, 1976-10)A voltammetric analysis of the electron-transfer process in poly(vinylferrocene) (PVF) has been carried out; the results indicate that the electrochemical behavior of ferrocene and PVF are quite similar. The field effects ...