DNA damage checkpoint responses in the S phase of synchronized diploid human fibroblasts.

abstract：:The efficiency of ruthenium complexes for photosensitizing DNA damage depends on the oxidizing character of their ligands. Here we report on the difference in behavior of tris(2.2'-bipyrazyl)ruthenium(II) (Ru[bpz]3(2+)), tris(2,2'-bipyridyl)ruthenium(II) (Ru[bipy]3(2+)) and cis-dichlorobis (2,2'-bipyrazyl)ruthenium(II...

journal_title：Photochemistry and photobiology

authors： Vicendo P,Mouysset S,Paillous N

更新日期：1997-04-01 00:00:00

abstract：:The broad-band normal incidence UVB beam radiation has been measured at Neve Zohar, Dead Sea basin, using a prototype tracking instrument composed of a Model 501A UV-Biometer mounted on an Eppley Solar Tracker Model St-1. The diffuse and beam fraction of the solar global UVB radiation have been determined using the co...

journal_title：Photochemistry and photobiology

authors： Kudish AI,Harari M,Evseev EG

更新日期：2011-01-01 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：:In this issue, we offer a symposium-in-print that is focused on several new advancements in fundamental research related to the family of GFP (green fluorescent protein)-like proteins. A few applied aspects are also included to illustrate the impact this amazing set of colored proteins has made on our understanding of...

journal_title：Photochemistry and photobiology

authors： Wachter RM

更新日期：2006-03-01 00:00:00

abstract：:Tetracycline molecules offer several sites for peroxidative metabolism of the type known to lead to oxygen consumption and electronic excitation. Accordingly, when tetracycline and chlortetracycline were exposed to horseradish peroxidase in the presence of hydrogen peroxide, oxygen was taken up and light emission was ...

journal_title：Photochemistry and photobiology

authors： Gilio VE,Cilento G

更新日期：1993-09-01 00:00:00

abstract：:Current conditions of 2-11 kJ m(-2) day(-1) of UV-B radiation and temperatures of >30 degrees C during flowering in cotton cultivated regions are projected to increase in the future. A controlled environment study was conducted in sunlit growth chambers to determine the effects of UV-B radiation and temperature on phy...

journal_title：Photochemistry and photobiology

authors： Reddy KR,Kakani VG,Zhao D,Koti S,Gao W

更新日期：2004-05-01 00:00:00

abstract：:The photophysical characteristics of two second-generation PDT photosensitizers, tin ethyl etiopurpurin I (SnET2) and tin octaethylbenzochlorin (SnOEBC), have been measured in homogeneous solution and when bound to bovine serum albumin (BSA). The ground state and triplet state absorption spectra have been characterize...

journal_title：Photochemistry and photobiology

authors： Pogue BW,Redmond RW,Trivedi N,Hasan T

更新日期：1998-12-01 00:00:00

abstract：:A 24 h preculture of HT29-18 human colonic adenocarcinoma cells with the sterol synthesis inhibitor lovastatin at concentrations of 0.1-0.5 microM markedly increased the photocytotoxic effect of photofrin II delivered to cells by low density lipoproteins. Under the same conditions, LDL binding and photofrin II (PII) u...

journal_title：Photochemistry and photobiology

authors： Biade S,Mazière JC,Mora L,Santus R,Mazière C,Auclair M,Morlière P,Dubertret L

更新日期：1993-02-01 00:00:00

abstract：:In the vertebrate retina, rods mediate twilight vision and cones mediate daylight vision. Their photoresponse characteristics are different. The light-sensitivity of a cone is 10(2)-10(3) times lower than that of a rod. In addition, the photoresponse time course is much faster in cones. The mechanism characterizing co...

journal_title：Photochemistry and photobiology

authors： Tachibanaki S,Shimauchi-Matsukawa Y,Arinobu D,Kawamura S

更新日期：2007-01-01 00:00:00

abstract：:Betanin (betanidin 5-O-β-D-glucoside) is a water-soluble plant pigment used as a color additive in food, drugs and cosmetic products. Despite its sensitivity to light and heat, betanin maintains appreciable tinctorial strength in low acidic and neutral conditions, where the color of other plant pigments, such as antho...

journal_title：Photochemistry and photobiology

authors： Esteves LC,Pinheiro AC,Pioli RM,Penna TC,Baader WJ,Correra TC,Bastos EL

更新日期：2018-09-01 00:00:00

abstract：:Irradiation with 365 nm light of Wi26VA4 SV40-transformed human fibroblasts cultured for 24 h in the presence of low density lipoproteins loaded with the anticancer porphyrin mixture Photofrin II resulted in a near complete inhibition of [14C]oleic acid incorporation into triacylglycerols, cholesteryl esters and phosp...

journal_title：Photochemistry and photobiology

authors： Biade S,Mazière JC,Mora L,Santus R,Morlière P,Mazière C,Salmon S,Gatt S,Dubertret L

更新日期：1992-01-01 00:00:00

abstract：:In order to gain insight into the preactivation of merocyanine 540 (MC540) 1 for the photodynamic therapy (Gulliya et al., 1990a, Photochem. Photobiol. 52, 831-838) its photo-oxidation was investigated. After irradiation of MC540 1 on a preparative scale three main photodegradation products were isolated with 16-20% y...

journal_title：Photochemistry and photobiology

authors： Franck B,Schneider U

更新日期：1992-08-01 00:00:00

abstract：:We report the preparation of aminopropyl-functionalized magnesium phyllosilicate (Mg-organoclay) conjugated to fluorescein isothiocyanate (FITC) functionality (FITC-organoclay) by one-pot sol-gel synthesis. The physical characteristics of the Mg- and FITC-organoclays were examined by scanning electron microscopy (SEM)...

journal_title：Photochemistry and photobiology

authors： Lee YC,Lee TH,Han HK,Go WJ,Yang JW,Shin HJ

更新日期：2010-05-01 00:00:00

abstract：:A novel antibody-fluorescence method has been developed to elucidate the chromophore topography in phytochrome as it undergoes a photochromic transformation. Förster energy transfer from N-terminal bound, fluorescently labeled Oat-25 Fab antibody fragments to the phytochrome chromophore was measured. The results sugge...

journal_title：Photochemistry and photobiology

authors： Farrens DL,Cordonnier MM,Pratt LH,Song PS

更新日期：1992-11-01 00:00:00

abstract：:Phthalocyanine 4 (Pc 4) is a promising photosensitizer currently in clinical trials. Photobiological responses to Pc 4 photodynamic therapy (Pc 4-PDT) have been characterized extensively, but relatively little has been done to evaluate dose metrics for this sensitizer. We describe an irradiation-induced increase in fl...

journal_title：Photochemistry and photobiology

authors： Wang KK,Wilson JD,Kenney ME,Mitra S,Foster TH

更新日期：2007-09-01 00:00:00

abstract：:As our understanding of the role of UV in causing skin cancer continues to expand, researchers and clinicians must continue to remain up to date on the various means by which UV exposure can be quantified. The purpose of this article was to review the current methods used to measure lifetime exposure to UV and to summ...

journal_title：Photochemistry and photobiology

authors： Worswick SD,Cockburn M,Peng D

更新日期：2008-11-01 00:00:00

abstract：:When Escherichia coli cells were irradiated by UVA in the presence of 6-mercaptopurine (6-MP) or 2-thiouracil (S2Ura), two kinds of repair-deficient strains of recA- and uvrA- were killed more efficiently than the parental wild-type strain having normal repair capacities. In addition, these agents with UVA exposure gr...

journal_title：Photochemistry and photobiology

authors： Komeda K,Iwamoto S,Kominami S,Ohnishi T

更新日期：1997-01-01 00:00:00

abstract：:To determine the origin of the UV-specific CC to TT tandem mutation at the CC site, we made a duplex DNA decamer containing a uracil cis-syn cyclobutane dimer (CBD) as the deaminated model of a cytosine dimer. Two-dimensional 1H-NMR spectroscopy studies were performed on this sequence where two adenines (Ade) were opp...

journal_title：Photochemistry and photobiology

authors： Lee HM,Kim JK

更新日期：2002-10-01 00:00:00

abstract：:Here, 10 guidelines are presented for a standardized definition of type I and type II photosensitized oxidation reactions. Because of varied notions of reactions mediated by photosensitizers, a checklist of recommendations is provided for their definitions. Type I and type II photoreactions are oxygen-dependent and in...

journal_title：Photochemistry and photobiology

authors： Baptista MS,Cadet J,Di Mascio P,Ghogare AA,Greer A,Hamblin MR,Lorente C,Nunez SC,Ribeiro MS,Thomas AH,Vignoni M,Yoshimura TM

更新日期：2017-07-01 00:00:00

abstract：:A set of linear and asymmetric coumarin-imidazole hybrid compounds having a N,N-diethylamine at 7-position and imidazole at 3-position on the coumarin were synthesized. Insertion of thiophene π-spacer between coumarin and imidazole moieties (5b, 5d) leads to redshifted absorption and emission compared to 5a and 5c. Al...

journal_title：Photochemistry and photobiology

authors： Bhagwat AA,Avhad KC,Patil DS,Sekar N

更新日期：2019-05-01 00:00:00

abstract：:Vitamin D production in human skin occurs only when incident UV radiation exceeds a certain threshold. From simulations of UV irradiances worldwide and throughout the year, we have studied the dependency of the extent and duration of cutaneous vitamin D production in terms of latitude, time, total ozone, clouds, aeros...

journal_title：Photochemistry and photobiology

authors： Engelsen O,Brustad M,Aksnes L,Lund E

更新日期：2005-11-01 00:00:00

abstract：:Photobiologic and synthetic versatility of hydrazones has not yet been established with (1)O2 as a route to commonly encountered nitrosamines. Thus, to determine whether the "parent" reaction of formalhydrazone and (1)O2 leads to facile C=N bond cleavage and resulting nitrosamine formation, we have carried out CCSD(T)...

journal_title：Photochemistry and photobiology

authors： Rudshteyn B,Castillo A,Ghogare AA,Liebman JF,Greer A

更新日期：2014-03-01 00:00:00

abstract：:Intermolecular interactions of human serum proteins with a hydrophilic nonmetalloporphyrin, 13,17-bis(1-carboxypropionyl)carbomoylethyl-8-ethenyl-2-hydroxy-3-hydroxyiminoethylidene-2,7,12,18-tetramethylporphyrin sodium salt (ATX-S10 (Na)), or a hydrophilic gallium-metalloporphyrin, diethylenetriamine pentaacetic acid ...

journal_title：Photochemistry and photobiology

authors： Yamaguchi M,Tanabe S,Nakajima S,Takemura T,Ogita K,Kuwayama H,Sakata I,Miyaki S,Suzuki K,Namiki H,Uzuka Y,Sarashina T

更新日期：2004-09-01 00:00:00

abstract：:Because metallothionein (MT) is elevated and may be protective in UV-irradiated skin, we have studied the effects of UV and other agents on MT transcription using the sheep MT 1A promoter, linked to the beta-galactosidase gene and stably transfected into human cell lines. beta-galactosidase reporter activity was induc...

journal_title：Photochemistry and photobiology

authors： Hansen C,Ablett E,Green A,Sturm RA,Dunn IS,Fairlie DP,West ML,Parsons PG

更新日期：1997-03-01 00:00:00

abstract：:Tin oxide nanoparticles about 4 nm in size were successfully synthesized using hydrothermal method. The photocatalytic activity of the particles was determined by the decolorization of malachite green (MG) and titanium yellow (TY) under UV light. 12 ppm of MG and TY were used for the solution with an initial volume of...

journal_title：Photochemistry and photobiology

authors： Esen B,Yumak T,Sınağ A,Yıldız T

更新日期：2011-03-01 00:00:00

abstract：:Photo-Fries rearrangements of 4-dodecylphenyl phenylacetate have been investigated in polyethylene films with 0-71% crystallinity and in hexane over a range of temperatures. The results are compared to those reported previously from phenyl phenylacetate and 1-naphthyl tetradecanoate to assess the influence of a long a...

journal_title：Photochemistry and photobiology

authors： Luo C,Passin P,Weiss RG

更新日期：2006-01-01 00:00:00

abstract：:Photolysis of ester 1 in argon-saturated methanol and acetonitrile does not produce any product, whereas irradiation of 1 in oxygen-saturated methanol yields peroxide 2. Laser flash photolysis studies demonstrate that 1 undergoes intramolecular H atom abstraction to form biradical 3 (λmax ~340 nm), which intersystem c...

journal_title：Photochemistry and photobiology

authors： Das A,Lao EA,Gudmundsdottir AD

更新日期：2016-05-01 00:00:00

abstract：:The protein environments surrounding the retinal tune electronic absorption maximum from 350 to 630 nm. Hybrid quantum mechanical/molecular mechanical (QM/MM) methods can be used in calculating excitation energies of retinal in its native protein environments and in studying the molecular basis of spectral tuning. We ...

journal_title：Photochemistry and photobiology

authors： Altun A,Yokoyama S,Morokuma K

更新日期：2008-07-01 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：:Ring-fused retinal analogs were designed to examine the hula-twist mode of the photoisomerization of the 9-cis retinylidene chromophore. Two 9-cis retinal analogs, the C11-C13 five-membered ring-fused and the C12-C14 five-membered ring-fused retinal derivatives, formed the pigments with opsin. The C11-C13 ring-fused a...

journal_title：Photochemistry and photobiology

authors： Hirano T,Lim IT,Kim DM,Zheng XG,Yoshihara K,Oyama Y,Imai H,Shichida Y,Ishiguro M

更新日期：2002-12-01 00:00:00