Citations Only: Recent submissions
Now showing items 861-880 of 990
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Diffusion coefficients in anisotropic fluids by ESR imaging of concentration profiles
(American Institute of Physics: The Journal of Chemical Physics, 1986-03-15)We report on the use of ESR imaging for determining the translational diffusion constants of typical ESR spin probes in ordered and isotropic solvents. A discussion is given for a Fourier deconvolution method for determining ... -
A multipurpose MRI phantom based on a reverse micelle solution.
(Wiley: Magnetic Resonance in Medicine, 1996-01)Many chemical solutions for use in magnetic resonance imaging phantoms have been reported in the literature. Each of these solutions has its application-specific advantages and disadvantages. We propose a single reverse ... -
Motions of water, decane, and bis(2-ethylhexyl)sulfosuccinate sodium salt in reverse micelle solutions
(The American Chemical Society: Langmuir, 1999-08-17)Reverse micellar solutions made from the surfactant bis(2-ethylhexyl)sulfosuccinate sodium salt (AOT), water, and decane have been studied using NMR inversion-recovery and pulsed-field gradient experiments. Spin-lattice ... -
Magnetic field mapping
(Wiley: Magnetic Resonance in Medicine, 1988-02)Homogeneous radiofrequency magnetic fields are necessary for production of high-quality magnetic images and for most forms of magnetic resonance spectroscopy. It is often convenient to map the radiofrequency homogeneity ... -
Classification of trabecular structure in magnetic resonance images based on morphological granulometries.
(Wiley: Magnetic Resonance in Medicine, 1993-03)A new method of detecting structured changes in trabecular bone, such as those associated with osteoporosis, was evaluated on magnetic resonance images of the wrist. The method was based on gray-scale morphological ... -
Rapid solid-phase immunoassay for 6-keto prostaglandin F1 alpha on microplates
(The American Association of Clinical Chemistry: Clinical Chemistry, 1990-03-01)We describe, for the measurement of 6-keto prostaglandin F1 alpha in biological media, a solid-phase immunoassay with immobilized antibodies that requires a total processing time of less than 2 h with hands-on time less ... -
A project-oriented biochemistry laboratory course
(American Chemical Society: Journal of Chemical Education, 1999-08)A project-oriented laboratory course has been designed to introduce students to the study of biochemistry as it is practiced. The course is designed to be a capstone experience for students enrolled in a variety of majors ... -
Determination of free progesterone in an ultrafiltrate of saliva collected in situ
(The American Association for Clinical Chemistry: Clinical Chemistry, 1990-08-01)We have investigated the utility of an ultrafiltrate of saliva for measuring progesterone as an indicator of luteal function during the menstrual cycle of women. A filtrate of saliva is collected in the mouth by means of ... -
Cocaine and benzoylecgonine in saliva, serum, and urine
(American Association for Clinical Chemistry: Clinical Chemistry, 1993-03-01)We studied the feasibility of using saliva to detect cocaine and benzoylecgonine. Saliva was collected as an ultrafiltrate directly in the mouth with an osmotic device. We analyzed by immunoassay matched samples of urine, ... -
Fast charge-transfer reactions of binuclear complexes undergoing large changes in metal---metal bond lengths
(Elsevier: Journal of Electroanalytical Chemistry, 1987-05-08)Heterogeneous electron-transfer rates have been measured for three binuclear complexes, Cp2Fe2(CO)2(μ-SMe)2, 1, Cp2Fe2(CO)2(μ-PPh2)2, 2, and Cp2Mo2(μ-SMe)4, 3. Dahl and co-workers had shown previously that the cations of ... -
The role of energetic disorders in conjugated polymers
(American Physical Society: Annual March Meeting 2001, 2001-03)In the present work PPV-oligomers have been blended with the corresponding polymer in very low concentrations so as to create low energy sites in the higher band gap oligomer matrix. The effect of doping on the energetics ... -
Sensitized carrier generation in evaporated thin films and particle dispersions of benzimidazole perylene
(International Society for Optical Engineering, 1999-10)We studied photoconductivity in particle dispersions and vacuum evaporated films of benzimidazole perylene (BZP) pigment in contact with a tetraphenyldiamine (TPD) hole transport layer. Xerographic photoreceptors based on ... -
Luminescence efficiency and time dependence in a high electron affinity conjugated polymer
(Elsevier: Synthetic Metals, 1996-01)We report measurements of the efficiency and time dependence of photoluminescence in a high electron affinity cyano-substituted derivative of poly (p-phenylenevinylene). In solution the photoluminescence quantum yield is ... -
Aggregation effects on the structure and optical properties of a model PPV oligomer
(Elsevier: Synthetic Metals, 2001-03-15)We report the effects of solvent-induced aggregation on photoluminescence spectra, decay dynamics and quantum yield in trimers of MEH-PPV and compare these to analogous experiments on the high molecular weight polymer. ... -
Conformational effects on the photophysics of conjugated polymers: a two species model for MEH-PPV spectroscopy and dynamics
(The American Chemical Society: Macromolecules, 2001-03-27)We report transient and steady state photoluminescence results along with absorption and NMR data to support the existence of two distinct morphological species in MEH-PPV solutions. NMR data provide evidence for the close ... -
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 ... -
Ionic addition mechanism investigation. Determination of deuterated nortricyclyl alcohol stereochemistry
(The American Chemical Society: The Journal of Organic Chemistry, 1973-02-09) -
Azuleno[l,8-bc]thiapyran and azuleno[ 1,8-cd]azepine
(The American Chemical Society: The Journal of Organic Chemistry, 1968-02) -
Reaction of 2,4-dinitrobenzenesulfenyl chloride with quadricyclene
(The American Chemical Society: The Journal of Organic Chemistry, 1982-04-09)The treatment of quadricyclene with 2,4-dinitrobenzenesulfenyl chloride has been reinvestigated and chloro adducts 1-A and 2b-A as well as acetates 4a-A, 4b-A, 6, and 7 have been obtained. Establishing 2b-A with endo-chloride ... -
RhCl3-catalyzed hydroboration of alkenyl nitriles
(Elsevier: Tetrahedron Letters, 2003-08-11)RhCl3-promoted hydroboration-oxidation reactions of representative alkenyl nitriles have been carried out. Carbanion of acetonitrile is formed from the carbon&unknown;carbon heterolytic bond breaking in allyl cyanide during ...