نتایج جستجو برای: methoxy psoralen
تعداد نتایج: 8645 فیلتر نتایج به سال:
G. Martini1, T. Troiani1, D. Vitagliano1, S. Napolitano1, F. Morgillo1, F. Liotti2, R. Melillo2, P.P. Vitiello1, A. Capasso1, V. Gambardella1, D. Ciardiello1, F. Venturini1, C. Cardone1, M. Orditura1, F. Ciardiello1, E. Martinelli1 Dipt. di Internistica Clinica E Sperimentale, Second University of Naples, Naples, ITALY Dipartimento di Medicina Molecolare E Biotecnologia Medica, Università degli...
The strong in ̄uence of the oxide support upon the turn-over frequency (TOF) of methanol oxidation over supported metal oxide catalysts has been well documented in recent years. However, the mechanistic origins (adsorption equilibrium of methanol to methoxy species, rate-determining methoxy surface decomposition, or product desorption equilibrium) of this interesting phenomenon are not completel...
A new electrophilic polymer, 2,4-dinitrophenyl ether of polyvinyl alcohol (PVA-DNP), having a degree substitution 0.5 was prepared from (PVA) and 1-fluro-2,4-dinitrobenzene (DNFB). The PVA-DNP polymer characterized by NMR, IR, UV-visible spectroscopy. reaction with sodium methoxide followed NMR Evidence bound spirocyclic SIGMA complex, C-1 C-3 DNP-methoxy complexes the formation methoxy complex...
Base-catalyzed reversal of a psoralen-DNA cross-link has been observed under denaturing alkaline conditions at elevated temperatures. The cross-link was formed between 4'-(hydroxymethyl)-4,5',8-trimethylpsoralen and the two thymidine residues (T) on opposite strands of the double-stranded DNA formed from the self-complementary oligonucleotide 5'-GGGTACCC-3'. In contrast to the photoreversal of ...
Synthetic DNA substrates containing a site-specifically engineered psoralen monoadduct or diadduct were used to characterize the response of the E. coli RNA polymerase elongation complex to these lesions. The psoralen derivative HMT (4'-hydroxymethyl-4,5', 8-trimethylpsoralen) was site specifically placed into two synthetic double-stranded DNA fragments each of which contained an E. coli RNA po...
The first Mannich reaction employing phthalides using a quinidine-based multifunctional catalyst has been developed. The reported method led to the synthesis of 3,3-disubstituted phthalide derivatives in excellent yields, with good diastereo- and enantioselectivities. Convenient synthesis of chiral isoquinolinones and isoquinolines has also been demonstrated.
David A. Cook, MD, MHPE The article by Weinger1 in this issue describes a useful framework for thinking about research in simulation. It emphasizes the need for purposeful and programmatic accumulation of information to guide our use of simulation. The analogy with a drug is apt, albeit inexact, given the variations in dose (instructional design and intensity), dosing (repetition), disease (lea...
background: host immune system response against blood group antigens is a major problem in blood transfusions, especially forthalassemic patients. thus, an approach was proposed coating the red blood cell (rbc) surface by polyethylene glycol.objectives: this study aimed to obtain the optimal simultaneous camouflge of the major and minor antigens by activated methoxypolyethylene glycol (mpeg) wi...
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