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2 edition of Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis found in the catalog.

Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis

Anthony William Parker

Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis

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  • 37 Currently reading

Published by typescript in [s.l.] .
Written in English


Edition Notes

Thesis (Ph.D.) - University of Warwick, 1985.

Statementby Anthony William Parker.
ID Numbers
Open LibraryOL13863908M

the percent of people in a study or treatment group who are alive 5 years after they are diagnosed with or treated for cancer. addictive drug produced by fermentation that is the intoxicating substance in alcohol beverages. state of confusion, delusions, and agitation brought by withdrawal from alcohol. Photoreactivity of Drugs in vitro and in vivo Hanne Hjorth Tønnesen 1 and an excited state of another molecular entity, either by energy transfer, electron transfer, or by a chemical mechanism. A scavenger is a compound that reacts with the photochemically-induced reactive species, e.g., free radicals or reactive oxygen species.   provides accurate and independent information on more t prescription drugs, over-the-counter medicines and natural products. This material is provided for educational purposes only and is not intended for medical advice, diagnosis or treatment. Data sources include IBM Watson Micromedex (updated 10 Apr ), Cerner Multum™ (updated 6 Apr ), .


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Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis by Anthony William Parker Download PDF EPUB FB2

Parker, Anthony William () Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis. PhD thesis, University of : Anthony William Parker.

Excited state studies of pyrimidine bases and radiosensitizing drugs by Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis book flash photolysis Author: Parker, A. The obtained results reveal that the drug itself and its anilino-pyrimidine fragment are not DNA photosensitizers.

By contrast, the pyridyl-pyrimidine substructure displays a marked phototoxic potential, which has been associated with the generation of a long-lived triplet excited state.

The triplet excited state of xanthone was generated and characterized by laser flash photolysis in acetonitrile (λmax= nm; t= ms) and in ionic liquid 1-butylmethylimidazolium. Alam MM, Fujitsuka M, Watanabe A, Ito O () Photochemical properties of excited triplet state of 6H-purinethione investigated by laser flash photolysis.

J Phys Chem A – Google ScholarCited by: Studies of the properties of the triplet states of rhodamine dyes have relied on either microsecond flash photolysis [ or on steady-state laser techniques [22,23] to produce the triplet state.

In the case of flash photolysis, both energy transfer and singlet depletion methods have been applied to derive the absorption spectra and associated molar absorption * Corresponding author. Cited by:   Excited state dynamics of Michler's ketone: a laser flash photolysis study. Abstract. Steady state absorption and fluorescence as well as the time resolved absorption studies in the pico and subpicosecond time domain have been performed to characterize the excited singlet and triplet states of Michler's ketone (MK).Cited by: Parker, Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis book William () Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis.

PhD thesis, University of Warwick. Peters, David William () RNA synthesis in 'Candida albicans'. PhD thesis, University of Warwick. This work shows the results of laser flash photolysis (LFP) studies of the reaction of isatin (1) and N-methylisatin (2) in the presence of several quenchers, including hydrogen and electron by: The properties of the lowest energy excited state of 8-TG (T 1) have been studied by laser flash photolysis, and it was subsequently established that this excited T 1 state could act as a sensitizer, while in its ground state it could act as an acceptor of 1 O 2.

Guanosine, formally a reduction product of 8-TG, is a rather unexpected Cited by: 1. The study of triplet excited state behavior of nucleic acids and component mononucleotides is hampered by the very small yields produced by direct photolysis.

3-Me-2,6-diazaindole ((2,6-aza)Ind) was strategically designed and synthesized to probe water molecule catalyzed excited-state proton transfer in aqueous solution. Upon electronic excitation (λmax ∼ nm), (2,6-aza)Ind undergoes N(1)–H to N(6) long-distance proton transfer in neutral H2O, resulting in normal ( nm) and proton-transfer tautomer ( nm) emissions with an overall Cited by: Excited-state photoreactions of chlorine dioxide in water.

Robert C. Dunn; Laser flash photolysis of arylsulfonium salts: studies of photoproduced proton kinetics and mechanism in polar solvents by a pH-jump method.

Journal of the American Chemical Society Parker, Anthony William () Excited state studies Excited state studies of pyramidine bases and radiosensitizing drugs by laser flash photolysis book pyramidine bases and radiosensitizing drugs by laser flash photolysis.

PhD thesis, University of Warwick. Peters, David William () RNA synthesis in 'Candida albicans'. PhD thesis, University of Warwick. Pombo-Villar, Esteban () Some chemistry relating to turmerones.

Laser flash photolysis experiments were performed using an excimer laser that provided a nm pulse with a ns duration. The maximum energy was 3 mJ per pulse.

The analyzing light source was a W xenon lamp, the intensity of which was increased about times during the detection of transient by: 7. Direct laser flash photolysis studies are complicated by the extensive overlap, in both wavelength and time, of the signals due to the biradical and the triplet state4' by: A laser flash photolysis investigation was carried out on the mechanism of electron photoejection in fluoroquinolone derivatives, bearing either electron donating or electron accepting substituents in position 8, laser excited at = nm in neutral aqueous solutions.

The Cited by: PhD. University of Warwick. “Excited State Studies of Pyrimidine bases and Radiosensitizing Drugs by Laser Flash Photolysis”.

Joined the CLF inHead of the LSF between andstepped down to focus more on research and my STFC Fellowship. To. Ultrafast Processes Occurring in Radiolysis of Highly Concentrated Solutions of Nucleosides/Tides laser flash photolysis studies of a ribosephosphate solution at room sugar radical formation has been observed via a rapid charge and spin transfer process from base to the sugar in the excited state of purine and pyrimidine base cation Author: Jun Ma, Sergey A.

Denisov, Amitava Adhikary, Mehran Mostafavi. On the other hand the pyrrole substituted CuL⁴ complex exhibits the structure and medium dependent selective electron-transfer in triplet state as observed in laser flash photolysis studies.

The triplet state properties of 1,5-diamino-9,anthroquinone and 1,5- and 1,8-dihydroxy-9,anthraquinone in cyclohexane, acetonitrile and isopropyl alcohol were investigated using a nanosecond laser flash photolysis technique.

The T-T absorption spectra, the triplet quantum yield, the triplet energy level and the triplet decay kinetics were estimated. The formation of head-to-tail contacts in de novo synthesized benzophenone/tyrosine dyads, bp logical sum Tyr, was probed in the ground and excited triplet state by NMR techniques and laser flash.

Laser flash photolysis (LFP, nm excitation) of the anti-cancer drug tirapazamine (TPZ) in acetonitrile produces the singlet excited-state S1 with lambda(max) = nm. Triplet Excited State Laser Flash Photolysis Sunscreen Agent Intramolecular Hydrogen Transfer Sunscreen Formulation These keywords were added by machine and not by the authors.

This process is experimental and the keywords may be updated as the learning algorithm by: 1. Start studying PHARMACOLOGY Review 1 & 2. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Excited State Enantiodifferentiating Interactions between a Chiral Benzophenone Derivative and Nucleosides. Journal of the American Chemical SocietyBOOK REVIEWS.

Natural Product Synthesis II: Targets, Methods, Concepts. Topics in Current Chemistry, Edited by Johann Mulzer (Universität Wien). Molecules, an international, peer-reviewed Open Access journal.

Dear Colleagues, The enormous importance of free radical chemistry for a variety of biological events, including ageing and inflammation, has attracted a strong interest in understanding the related mechanistic steps at the molecular level.

Photobiology integrates a wide variety of scientific disciplines. As more people become aware of the many ways light interacts with chemical and biological systems, the need for a concise treatment of photobiology has become more critical. Kohen et al.

Have written just such a book, intended both as a textbook and as a reference. Parker, A. () Excited state studies of pyrimidine bases and radiosensitizing drugs by laser flash photolysis. Ph.D. thesis, University of Warwick, Coventry, UK.

Scandola, F. and V. Balzani () Free-energy relationships for electron-transfer processes. Abdullah, Khalid Ali () Kinetics of electron-transfer quenching of excited aromatic molecules in solution. PhD thesis, University of Warwick. Ainsworth, Simon () Surface EXAFS (extended X-ray absorption fine structure) studies of adsorbates on surfaces.

PhD thesis, University of Warwick. Ali, M. () Developments in D.C. disc machines:|bdesign, construction and performance. Primary photophysical and photochemical processes for cis,trans,cis-[Pt(N 3) 2 (OH) 2 (NH 3) 2] and trans,trans,trans-[Pt(N 3) 2 (OH) 2 (NH 3) 2] complexes were studied by means of stationary photolysis, nanosecond laser flash photolysis and ultrafast kinetic spectroscopy.

The process of photolysis. Recognition of unusual left-handed Z-DNA by specific binding of small molecules is crucial for understanding biological functions in which this particular structure participates. Recent investigations indicate that zinc cationic porphyrin (ZnTMPyP4) is promising as a probe for recognizing Z-DNA due to its characteristic chiroptical properties upon binding with by: 3.

drugs that have a potential for abuse. these drugs are placed into five catergories, ranging from schedule 1 drugs (which are the most dangerous and most likely to be abused) to schedule V drugs, whichare the least dangerous and least likely to be abused; also known as schedule drugs.

Excited State Behavior of Diarylethenes in the Subnanosecond Timescale: The Role of an Upper Singlet Journal of the American Chemical SocietyJournal of the American Chemical Society, 44, (Book Review) Publication Date (Web): November 6, First Page.

Start studying pharmacology ch#30 pituitary drugs. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The Paternò-Büchi reaction is a photochemical reaction between a carbonyl compound and an alkene to give the corresponding oxetane.

In this review the mechanism of the reaction is discussed. On this basis the described use in the reaction with electron rich alkenes (enolethers, enol esters, enol silyl ethers, enanines, heterocyclic compounds has been by: Start studying Drugs.

Learn vocabulary, terms, and more with flashcards, games, and other study tools. The spectral studies include IR, Far IR, UV, 1 H NMR, 13 C NMR, 31 P NMR, Mass, ESR, 57 Fe Mossbauer, resonance Raman spectra, photo electron spectroscopy, etc.

Semi empirical computational calculations, stability constant studies, gravimetric determinations of the metal complexes and thermal studies were also involved. Excited state properties. vacuum UV photolysis of CH2CH2 at A.

The ratio between molecular and diatom elimination of H, vs. H ejections was re- ported as O. 14, whereas in the present work the corresponding ratio is On the other hand, Wijnen and co-w~rkers~~ observed in their studies on CH2CHCl photolysis that at X > 8, the main route.

INTRODUCTION. Photodynamic therapy (PDT) is an emerging treatment approach that uses a non-toxic photosensitizer and harmless visible or near-infrared (NIR) light to kill diseased cells by generating reactive oxygen species, such as singlet oxygen, superoxide and hydroxyl radicals ().To enhance the efficacy and selectivity of response, molecular tuning of the chemical and electronic-structure Cited by:.

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