نتایج جستجو برای: αα benzylidene bis4 hydroxycoumarin

تعداد نتایج: 1764  

2012
Birol Guvenc Abdullah Canataroglu Cagatay Unsal Sule Menziletoglu Yildiz Ferda Tekin Turhan Sevcan Tug Bozdogan Suleyman Dincer Hakan Erkman

INTRODUCTION The frequency of hemoglobinopathies is still high in Adana, the biggest city of the Cukurova Region that is located in the southern part of Turkey. Our aim was to identify the concomitant mutations in α- and β-globin genes which lead to complex hemoglobinopathies and to establish an appropriate plan of action for each subject, particularly when prenatal diagnosis is necessary. MA...

1995
M. Klasen G. Kramer

We have calculated inclusive two-jet production in low Q 2 ep collisions at O(αα 2 s) superimposing direct and resolved contributions. The results are compared with recent experimental data from the ZEUS collaboration at HERA.

Journal: :Berichte der deutschen chemischen Gesellschaft 1895

2014
Aritra Chaudhury Sajal K Maity Rina Ghosh

The present work describes efficient avenues for the synthesis of the trisaccharide repeating unit [α-D-Rhap-(1→3)-α-D-Rhap-(1→3)-α-D-Rhap] associated with the A-band polysaccharide of Pseudomonas aeruginosa. One of the key steps involved 6-O-deoxygenation of either partially or fully acylated 4,6-O-benzylidene-1-thiomannopyranoside by radical-mediated redox rearrangement in high yields and reg...

Journal: :The Journal of biological chemistry 1991
D G Myszka R P Swenson

A photoaffinity analog of 4-hydroxycoumarin containing an azidobenzyl group at the 3-position and, if desired, carbon-14 or tritium radionuclides has been synthesized and characterized. This compound, 3-(p-azidobenzyl)-4-hydroxycoumarin, serves as an effective competitive inhibitor of the dicoumarol-sensitive NAD(P)H:quinone reductase (EC 1.6.99.2; DT-diaphorase) from rat liver, having an appar...

Journal: :Bosnian journal of basic medical sciences 2008
Davorka Zavrsnik Samija Muratović Selma Spirtović Dzenita Softić Marica Medić-Sarić

Due to exceptional reactivity of 4-hydroxycoumarin, the synthesis of new coumarin derivatives of dimer and tetramer type has been carried out. The synthesis was carried out from 4-hydroxycoumarin and various aromatic aldehydes. In this way, compounds of the dimer 3,3'-(benzilidene)bis (4-hydroxycoumarin) type, as well as of the tetramer 3,3',3'',3'''-(1,4-dimethylenphenyl)tetra (4-hydroxycoumar...

Journal: :Drug metabolism and disposition: the biological fate of chemicals 1998
D J Carlile A J Stevens E I Ashforth D Waghela J B Houston

The pharmacokinetics of ethoxycoumarin have been characterized using steady-state plasma concentrations achieved after administration of this compound, at a series of infusion rates, into the hepatic portal vein of rats. The clearance of ethoxycoumarin could be described by a one-site Michaelis-Menten kinetic model with Vmax and unbound KM values of 495 nmol/min/standard rat weight (SRW) and 3....

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