Theoretical investigation of the photosensitization mechanisms of urocanic acid.

Computational study of three dimensional potential energy surfaces in intermolecular hydrogen bonding of cis-urocanic acid

Electronic spectra, structure and photoisomerization of urocanic acid

-Electronic absorption and fluorescence spectra of urocanic acid are studied in aqueous solution at different pH. The observed results are explained using molecular orbital geometry optimization calculations for the ground states of a number of tautomers of urocanic acid including those of its anion, followed by calculation of electronic transitions. The isomers of urocanic acid which would str...

Reaction between Thiouracil derivatives and Chloroasetic acid in gas and soluble phases:A theoretical study

Thiouracilis a historically relevant anti-thyroid preparation. Because of its structure you can find it in various chemical reactions differently. In this study, the reaction of Thiouracil with Chloroacetic acid and the formation of their additive products has been investigated. This reaction is aconcerted process, and it has not been determined yet by exhaustive mechanisms. From the potential ...

Expression of VjbR under Nutrient Limitation Conditions Is Regulated at the Post-Transcriptional Level by Specific Acidic pH Values and Urocanic Acid

VjbR is a LuxR homolog that regulates transcription of many genes including important virulence determinants of the facultative intracellular pathogen Brucella abortus. This transcription factor belongs to a family of regulators that participate in a cell-cell communication process called quorum sensing, which enables bacteria to respond to changes in cell population density by monitoring conce...

Urinary urocanic acid in man: the identification of urocanic acid and the comparative excretions of urocanic acid and N-formiminoglutamic acid after oral histidine in patients with liver disease.

The amino acid L-histidine is obtained by man primarily from dietary protein. The essential need for this amino acid, however, has not been demonstrated conclusively (1). Previous studies have indicated that the major pathways of utilization of L-histidine are by way of incorporation into body protein, excretion into the urine, and metabolism to glutamic acid. It is believed that the pertinent ...