Role of xanthurenic acid 8-O-beta-D-glucoside, a novel fluorophore that accumulates in the brunescent human eye lens.

abstract：:This review focuses on damage photosensitized by the fluoroquinolone (FQ) antibacterial drugs. Different models are employed to study biosubstrate photodamage mediated by FQs (organisms, cells, isolated biomolecules and super molecules). Being that the effect of environment (polarity of the medium, ions, pH, binding w...

journal_title：Photochemistry and photobiology

authors： de Guidi G,Bracchitta G,Catalfo A

更新日期：2011-11-01 00:00:00

abstract：:The fluoroquinolone (FQ) antibiotics photosensitize human skin to solar UV radiation and are reported to photosensitize tumor formation in mouse skin. As tumor initiation will not occur without genotoxic insult, we examined the potential of ciprofloxacin, lomefloxacin, fleroxacin, BAYy3118 (a recently developed monofl...

journal_title：Photochemistry and photobiology

authors： Reavy HJ,Traynor NJ,Gibbs NK

更新日期：1997-09-01 00:00:00

abstract：:The octahedral rhodium complex, cis-dichloro bis(1,10 phenanthroline)rhodium(III) chloride (BISPHEN), is known to form covalent linkages with DNA involving the attachment of the metal to a base. In order to determine the sequence selectivity of this chemistry, solutions of the complex containing one of the double-stra...

journal_title：Photochemistry and photobiology

authors： Morrison H,Harmon H

更新日期：2000-12-01 00:00:00

abstract：:Differences between global radiation UVER (erythemal ultraviolet solar radiation) received under full sun and diffuse radiation received under the shadow of two types of tree are analyzed to check the importance of these components on human exposure to UV radiation. Blue Line spores dosimeters of VioSpor were used for...

journal_title：Photochemistry and photobiology

authors： Ysasi GG,Ribera LJ

更新日期：2013-05-01 00:00:00

abstract：:Cypridina luciferase (Cluc), a secreted luminescent protein identified from Cypridina noctiluca, has two N-glycosylation sites. In this study, we evaluated the effects of N-glycosylation on Cluc properties by creating site-directed mutagenic modifications at the consensus sequence for N-glycosylation (Asn-X-Ser/Thr). ...

journal_title：Photochemistry and photobiology

authors： Yasuno R,Mitani Y,Ohmiya Y

更新日期：2018-03-01 00:00:00

abstract：:Intracellular targets for the photosensitizer alpha-terthienyl (alpha T) were examined by fluorescence microscopy and microfluorospectrometry using human nonkeratinized buccal cells. Intracellular distribution of alpha T was observed as fluorescent patches widely dispersed in the cytoplasm. The distribution of the flu...

journal_title：Photochemistry and photobiology

authors： Sasaki M,Koyama S,Tokiwa K,Fujita H

更新日期：1993-05-01 00:00:00

abstract：:Cryptococus gattii is an emergent primary human pathogen that causes meningismus, papilledema, high intracranial pressure and focal involvement of the central nervous system in immunocompetent hosts. Prolonged antifungal therapy is the conventional treatment, but it is highly toxic, selects for resistant strains, cont...

journal_title：Photochemistry and photobiology

authors： Soares BM,Alves OA,Ferreira MV,Amorim JC,Sousa GR,Silveira Lde B,Prates RA,Avila TV,Baltazar Lde M,de Souza Dda G,Santos DA,Modolo LV,Cisalpino PS,Pinotti M

更新日期：2011-03-01 00:00:00

abstract：:The UV radiation environment on planetary surfaces and within atmospheres is of importance in a wide range of scientific disciplines. Solar UV radiation is a driving force of chemical and organic evolution and serves also as a constraint in biological evolution. In this work we modeled the transmission of present and ...

journal_title：Photochemistry and photobiology

authors： Rontó G,Bérces A,Lammer H,Cockell CS,Molina-Cuberos GJ,Patel MR,Selsis F

更新日期：2003-01-01 00:00:00

abstract：:In this manuscript, we demonstrate the control of film thickness and surface wettability in the photochemical immobilization of poly (vinyl alcohol) (PVA) to a self-assembled monolayer (SAM) containing a phthalimide chromophore. Surface attachment is characterized by ellipsometry and contact angle measurements. The we...

journal_title：Photochemistry and photobiology

authors： Carroll GT,Turro NJ,Mammana A,Koberstein JT

更新日期：2017-10-01 00:00:00

abstract：:Phototherapy with broadband UVB is an effective treatment for inflammatory dermatoses. A newly developed fluorescent UVB lamp (Philips TL01) that emits a narrowband UVB around 311 nm was shown to be superior for the phototherapy of psoriasis. In order to contribute to the knowledge about the carcinogenic potential of ...

journal_title：Photochemistry and photobiology

authors： Tzung TY,Rünger TM

更新日期：1998-06-01 00:00:00

abstract：:Four chemical preservatives commonly used in ophthalmic solutions were tested for their toxic and mutagenic potential in mouse lymphoma cells with and without exposure of the cells to ultraviolet A (UVA) radiation. The preservatives tested were benzalkonium chloride (BAK), chlorhexidine, thimerosal and ethylenediamine...

journal_title：Photochemistry and photobiology

authors： Withrow TJ,Brown NT,Hitchins VM,Strickland AG

更新日期：1989-09-01 00:00:00

abstract：:A fluorescence titration method was applied for the determination of pKa of ciprofloxacin (CPX) in solution. Values of 6.18 +/- 0.05 and 8.76 +/- 0.03 were obtained for pKa1 and pKa2, respectively. The method was used to determine the ionization constants in the presence of liposomes of dipalmitoylphosphatidylcholine ...

journal_title：Photochemistry and photobiology

authors： Vázquez JL,Berlanga M,Merino S,Domènech O,Viñas M,Montero MT,Hernández-Borrell J

更新日期：2001-01-01 00:00:00

abstract：:Uveal melanoma is the most frequent intraocular cancer and the second most common form of melanoma. It metastasizes in half of the patients and the prognostic is poor. Although ultraviolet (UV) radiation is a proven risk factor for skin melanoma, the role of UV light in the etiology of uveal melanoma is still contradi...

journal_title：Photochemistry and photobiology

authors： Mallet JD,Gendron SP,Drigeard Desgarnier MC,Rochette PJ

更新日期：2014-01-01 00:00:00

abstract：:The synthesis of some bromine-substituted rhodamine derivatives viz., 4,5-dibromorhodamine methyl ester (dye 2) and 4,5-dibromorhodamine n-butyl ester (dye 3) are reported. These dyes were synthesized to promote a more efficient cancer cell photosensitizer for potential use in in vitro bone marrow purging in preparati...

journal_title：Photochemistry and photobiology

authors： Pal P,Zeng H,Durocher G,Girard D,Li T,Gupta AK,Giasson R,Blanchard L,Gaboury L,Balassy A,Turmel C,Laperrière A,Villeneuve L

更新日期：1996-02-01 00:00:00

abstract：:The Photochemical Research Group from San Luis (Argentina) highlights the contributions of Dr. Norman Andino García to the development of the group as a way to show him our gratitude for all his support. ...

journal_title：Photochemistry and photobiology

authors： Ferrari G,Montaña MP

更新日期：2018-11-01 00:00:00

abstract：:A novel type of circadian and photoperiodic control of the cell division cycle was found in photoautotrophic Euglena gracilis. When algae entrained to 24 h light-dark (LD) cycles (14 h L) were transferred to continuous darkness (DD) at the eighth hour of the final LD photoperiod, cell-cycle transition was arrested in ...

journal_title：Photochemistry and photobiology

authors： Hagiwara SY,Bolige A,Zhang Y,Takahashi M,Yamagishi A,Goto K

更新日期：2002-07-01 00:00:00

abstract：:The photocycle in photoactive yellow protein (PYP) crystals was studied by single-crystal absorption spectroscopy with experimental setups for low-temperature and time-resolved measurements. Thin and flat PYP crystals, suitable for light absorption studies, were obtained using special crystallization conditions. Illum...

journal_title：Photochemistry and photobiology

authors： Kort R,Ravelli RB,Schotte F,Bourgeois D,Crielaard W,Hellingwerf KJ,Wulff M

更新日期：2003-08-01 00:00:00

abstract：:Syntheses for the new photosensitizers HOSiPcOSi(CH3)2(CH2)3N(CH1)1 or 3(CH3)2, Pc 34 and Pc 25, have been developed and the order of activity of these photosensitizers and the previously reported photosensitizer Pc 4, HOSiPcOSi(CH3)2(CH2)3N(CH3)2, in the dark and with broad-band red light toward Plasmodium falciparum...

journal_title：Photochemistry and photobiology

authors： Zhao XJ,Lustigman S,Li YS,Kenney ME,Ben-Hur E

更新日期：1997-08-01 00:00:00

abstract：:The photoluminescence (PL) of CdSe quantum dots (QD) in aqueous media has been studied in the presence of gold nanoparticles (NP) with different shapes. The steady state PL intensity of CdSe QD (1.5-2 nm in size) is quenched in the presence of gold NP. Picosecond bleach recovery and nanosecond time-resolved luminescen...

journal_title：Photochemistry and photobiology

authors： Nikoobakht B,Burda C,Braun M,Hun M,El-Sayed MA

更新日期：2002-06-01 00:00:00

abstract：:Near-infrared spectroscopy has been used to quantify the composition of healthy female breast tissue in vivo. By collecting transillumination spectra in the wavelength range 680-1100 nm at 7-9 positions on the breasts of five female volunteers, an attempt was made to quantify the intra- and intersubject variability of...

journal_title：Photochemistry and photobiology

authors： Quaresima V,Matcher SJ,Ferrari M

更新日期：1998-01-01 00:00:00

abstract：:Ultraviolet radiation can inhibit immune responses locally as well as systemically. Such effects have been measured in animals and humans exposed to ultraviolet B (wavelength 280-315 nm) (UVB) and ultraviolet A (315-400 nm) (UVA). The precise wavelength dependence is important for the identification of possible molecu...

journal_title：Photochemistry and photobiology

authors： Garssen J,de Gruijl F,Mol D,de Klerk A,Roholl P,Van Loveren H

更新日期：2001-04-01 00:00:00

abstract：:The capacity of some linear and angular furocoumarins to induce DNA-protein cross-links by UVA (320-400 nm) irradiation has been evaluated in Chinese hamster ovary cells. Two linear furocoumarins, psoralen and 8-methoxypsoralen appeared to be capable of inducing DNA-protein cross-links to a noticeable extent. 4'-Methy...

journal_title：Photochemistry and photobiology

authors： Bordin F,Carlassare F,Busulini L,Baccichetti F

更新日期：1993-07-01 00:00:00

abstract：:Polarized steady-state fluorescence and fluorescence excitation spectra as well as time-resolved fluorescence for B-phycoerythrin (B-PE) from red algae, Porphyridium cruentum, embedded in polyvinyl stretched films were measured. The lifetimes of polarized fluorescence were analyzed using exponential components and fra...

journal_title：Photochemistry and photobiology

authors： Frackowiak D,Ptak A,Gryczynski Z,Gryczynski I,Targowski P,Zelent B

更新日期：2004-01-01 00:00:00

abstract：:An approximate formula for the UV Index (UVI) under cloud-free, unpolluted, low surface albedo conditions is: UVI approximately 12.5mu(o)(2.42)(Omega/300)(-1.23) where mu(o) is the cosine of the solar zenith angle and Omega is the total vertical ozone column (in Dobson Units, DU). The dependence on mu(o) and Omega is ...

journal_title：Photochemistry and photobiology

authors： Madronich S

更新日期：2007-11-01 00:00:00

abstract：:We have studied the damage of alcohol dehydrogenase (ADH) and glyceraldehyde 3-phosphate dehydrogenase (GAPD) induced by Fe++/EDTA + H2O2 in combination with UV-A (main output at 365 nm). Enzyme inactivation, formation of hydroxyl radicals (measured in the absence of enzymes), increase in protein carbonyls, oxidation ...

journal_title：Photochemistry and photobiology

authors： Hu ML,Tappel AL

更新日期：1992-09-01 00:00:00

abstract：:Photoexcitation to generate triplet state has been proved to be the main photoreaction in homogeneous system for many benzoquinone derivatives, including oxidized coenzyme Q (CoQ) and its analogs. In the present study, microemulsion of CoQ, a heterogeneous system, is employed to mimic the distribution of CoQ in biomem...

journal_title：Photochemistry and photobiology

authors： Li K,Wang M,Wang J,Zhu R,Sun D,Sun X,Wang SL

更新日期：2013-01-01 00:00:00

abstract：:Human carcinoma cells (NHIK 3025 cells) and Chinese hamster cells (V79 cells) were incubated with AlPcS1, AlPcS2 and AlPcS4, phthalocyanines with different lipophilicity but with similar photochemical properties when in monomeric solutions. The absorption- and fluorescence spectra of the dyes in the cells were recorde...

journal_title：Photochemistry and photobiology

authors： Moan J,Berg K,Bommer JC,Western A

更新日期：1992-08-01 00:00:00

abstract：:Unlike the enchanting yellow-green flashes of light produced on warm summer evenings by Photinus pyralis, the most common firefly species in North America, the orange lights of Photinus scintillans are infrequently observed. These Photinus species, and likely all bioluminescent beetles, use the same substrates beetle ...

journal_title：Photochemistry and photobiology

authors： Branchini BR,Southworth TL,Fontaine DM,Murtiashaw MH,McGurk A,Talukder MH,Qureshi R,Yetil D,Sundlov JA,Gulick AM

更新日期：2017-03-01 00:00:00

abstract：:We report here the design and synthesis of porphyrin-metallocene dyads consisting of a metallocene [either ferrocene or mixed sandwich η(5)-[C5H4(COOH)]Co(η(4)-C4Ph4) connected via an ester linkage at meso phenyl position of either free-base or zinc porphyrin. All these dyad systems were characterized by various spect...

journal_title：Photochemistry and photobiology

authors： Gokulnath S,Achary BS,Kumar CK,Trivedi R,Sridhar B,Giribabu L

更新日期：2015-01-01 00:00:00

abstract：:A visual chromophore analogue, 10-methyl-13-demethyl (dm) retinal, was synthesized and reconstituted with bleached bovine rhodopsin to form a visual pigment derivative with absorbance maximum at 505 nm. The investigations with this new compound were stimulated from recent results using 13-dm retinal as a chromophore t...

journal_title：Photochemistry and photobiology

authors： Koch D,Gärtner W

更新日期：1997-01-01 00:00:00