The solvatochromic responses of uric acid (Ua), 6-amino-2-thiouracil (ATU) and a series of their complexes dissolved in ten solvents of different polarity have been measured. The solvent-dependent UV/Vis spectroscopic absorption maxima, λ(max), are assigned to the corresponding electronic transitions and analyzed using SPSS program, regression analysis and Kamlet and Taft methods. The observed ...

From the Cedars-Sinai Medical Center, Department of Pathology and Laboratory Medicine, Rita & Taft Schreiber Division of Transfusion Medicine, Los Angeles, California. Address reprint requests to: Alyssa Ziman, MD, UCLA Medical Center, 10833 Le Conte Avenue, Los Angeles, CA 90095; e-mail: [email protected]. Received for publication December 8, 2003; revision received January 29, 2004, and ...

The electronic absorption profiles of 3-cyano-1,5-diarylformazans were recorded in different organic solvents having different polarities. Both macroscopic and microscopic aspects were contemplated to determine the influence of various solute-solvent interactions upon absorption spectral shifts. The effects of solvent polarity on the absorbance profiles of the compounds were evaluated. The mult...

If your employee benefit plan has more than 100 participants, chances are you've had to work your way through the audited financial statements you're required to include with your Form 5500 filing. These statements contain a wealth of information about the financial health of your plan, and understanding them is an important fiduciary responsibility. To strengthen your grasp of financial statem...

Fifteen dyes based on Michler's aldehyde used as the electron donating group and differing by accepting groups have been designed synthesized. Interestingly, all showed a broad absorption extending over visible range. Examination of solvatochromism in twenty-three solvents different polarities revealed these to give remarkable linear correlations using Kamlet-Taft solvent polarity scale or SPP ...

A series of chromophores was designed and synthesized using 2-(3-cyano-4,5,5-trimethylfuran-2 (5H) -ylidene) malononitrile (TCF) as the electron acceptor differing from each other by use thirteen different donors. The dyes were characterized for their optical electrochemical properties theoretical calculations also carried out to support experimental results. By changing donor in dyes, absorbin...

The current issue of the Journal of Pediatric Psychology includes two papers about children and adolescents with eosinophilic gastrointestinal diseases, or EGIDs. Each paper addresses key behavioral and psychological aspects of pediatric EGIDs. The first paper, by Taft and colleagues, characterizes caregiver stress in the parents of children with EGIDs and describes the relationships between th...