Feasibility of using fluoresceinyl Cypridina luciferin analog in a novel chemiluminescence method for real-time photodynamic therapy dosimetry.

abstract：:More scheduled outdoor stay is increasingly advocated for school children. This study measured 2(nd) , 5(th) and 8(th) graders' erythemal UV-exposure in September, March and May at four Swedish schools. We related those exposures, as fractions of total available ambient radiation, to the schools outdoor environments d...

journal_title：Photochemistry and photobiology

authors： Pagels P,Wester U,Söderström M,Lindelöf B,Boldemann C

更新日期：2016-01-01 00:00:00

abstract：:We study the fluorescence lifetime of the well-known 1-pyrene butyric acid (PBA) to assess oxygen concentrations in living cells. The behavior of the probe is first studied in water, ethanol, protein solution and liposome suspension. The Stern-Volmer plot of these solutions is linear, and the bimolecular reaction rate...

journal_title：Photochemistry and photobiology

authors： Ribou AC,Vigo J,Salmon JM

更新日期：2004-09-01 00:00:00

abstract：:Near-UV (337 nm) photoactivation of the 5-hydroxytryptophan decarboxylation reaction producing serotonin has been observed. The photoactivation effect was investigated as a function of fluence rate and fluence, and pH. Photoactivation of decarboxylase activity was found to occur at nearly neutral pH values (low activi...

journal_title：Photochemistry and photobiology

authors： Fraikin GY,Strakhovskaya MG,Ivanova EV,Rubin AB

更新日期：1989-04-01 00:00:00

abstract：:In current clinical practice, photodynamic therapy (PDT) is carried out with prescribed drug doses and light doses as well as fixed drug-light intervals and illumination fluence rates. This approach can result in undesirable treatment outcomes of either overtreatment or undertreatment because of biological variations ...

journal_title：Photochemistry and photobiology

authors： Zeng H,Korbelik M,McLean DI,MacAulay C,Lui H

更新日期：2002-04-01 00:00:00

abstract：:Flash-induced absorbance spectroscopy was used to analyze the proton uptake and electron transfer properties of photosynthetic reaction centers (RC) of Rhodobacter capsulatus that have been genetically modified near the primary quinone electron acceptor (Q(A)). M246Ala and M247Ala, which are symmetry-related to the po...

journal_title：Photochemistry and photobiology

authors： Tandori J,Miksovska J,Valerio-Lepiniec M,Schiffer M,Maróti P,Hanson DK,Sebban P

更新日期：2002-02-01 00:00:00

abstract：:Excessive sun exposure can cause sunburn, suntan, skin photoaging, and even skin cancer. Skin photoaging conflicts with the human pursuit of a young and beautiful appearance. Some research data indicate that the incidence of skin cancer in the Chinese has been increasing, although it remains lower than in whites. To e...

journal_title：Photochemistry and photobiology

authors： Wan M,Hu R,Li Y,Wang Y,Xie X,Yue P,Guan L,Lai W

更新日期：2016-09-01 00:00:00

abstract：:We calculated the integrated UVB and plant damage irradiances for Argentina, a country in the Southern Hemisphere spread over a large latitudinal range. The irradiances were calculated for clear sky days using the Madronich code for the average conditions of the months corresponding to the summer and winter solstices ...

journal_title：Photochemistry and photobiology

authors： Micheletti MI,Piacentini RD

更新日期：2002-09-01 00:00:00

abstract：:Phototropin is a blue light-activated photoreceptor that plays a dominant role in the phototropism of plants. The protein contains two subunits that bind flavin mononucleotide (FMN), which are responsible for the initial steps of the light-induced reaction. It has been proposed that the photoexcited flavin molecule ad...

journal_title：Photochemistry and photobiology

authors： Neiss C,Saalfrank P

更新日期：2003-01-01 00:00:00

abstract：:In photodynamic therapy with topically applied delta-aminolevulinic acid porphyrins are acting as photosensitizers. The profile of porphyrin metabolites in normal or in neoplastic skin after administration of delta-aminolevulinic acid has not been determined in detail yet. Thus, to study porphyrin biosynthesis in huma...

journal_title：Photochemistry and photobiology

authors： Fritsch C,Batz J,Bolsen K,Schulte KW,Zumdick M,Ruzicka T,Goerz G

更新日期：1997-07-01 00:00:00

abstract：:The retinal protonated Schiff base of bacteriorhodopsin is photoreactive to reducing agents such as NaBH4. In the present work we have studied the effect of different protein hydration levels on the photoreductive reaction, as well as the consequences of preventing isomerization around the critical C13=C14 retinal dou...

journal_title：Photochemistry and photobiology

authors： Aharoni A,Ottolenghi M,Sheves M

更新日期：2002-06-01 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

abstract：:The kinetics of transients formed under photoexcitation of benzophenone (B) dissolved in three different polymers was studied by ns laser flash photolysis. These polymers were the soft rubbers poly (ethylene-co-butylene) (EB), polystyrene block-poly(ethylene-ran-butylene)-block-polystyrene (SEBS) and hard polystyrene ...

journal_title：Photochemistry and photobiology

authors： Levin PP,Efremkin AF,Sultimova NB,Kasparov VV,Khudyakov IV

更新日期：2014-03-01 00:00:00

abstract：:Within this study, the erythemal ultraviolet (UV) exposure received by different parts of the body during four different activities is determined. Optoelectronic devices were used to measure the erythemal UV exposure at 10 different positions of the body. The measuring devices were fixed on the forehead, on the should...

journal_title：Photochemistry and photobiology

authors： Weihs P,Schmalwieser A,Reinisch C,Meraner E,Walisch S,Harald M

更新日期：2013-07-01 00:00:00

abstract：:Iranian firefly larvae, Lampyris turkestanicus collected from north of Iran and their luciferin were analyzed by HPLC, TLC, MS and spectroscopic Fourier transform ([FT]-IR, FT-NMR, UV and fluorescence) methods. The results showed that luciferin in L turkestanicus lanterns was the same as in the American firefly, Photi...

journal_title：Photochemistry and photobiology

authors： Hadj-Mohammadi MR,Chaichi MJ

更新日期：1996-11-01 00:00:00

abstract：:This paper focuses on the estimation of the UV Index (UVI) for all sky conditions using a simple analytical parameterization involving three independent variables: the solar zenith angle, the total ozone column and the clearness index. Measurements of the UVI made at Badajoz and Cáceres (Southwestern Spain) from Janua...

journal_title：Photochemistry and photobiology

authors： Antón M,Serrano A,Cancillo ML,García JA,Madronich S

更新日期：2011-03-01 00:00:00

abstract：:This paper analyzes the influence of infrared radiation (IR) on regeneration, after autotomy of limb buds of Neohelice granulata and consequently the time molt. Eyestalks were ablated to synchronize the start of molt. Afterward, animals were autotomized of five pereopods and divided into control and irradiated groups....

journal_title：Photochemistry and photobiology

authors： Gonzalez VC,Lena AB,Espindola WA,de Souza Votto AP,Jorge MB,de Moraes Vaz Batista Filgueira D,Bianchini A,Sérgio Varela Júnior A,Nery LE,Trindade GS

更新日期：2009-09-01 00:00:00

abstract：:Solar radiation is known to be a major contributor to the development of skin cancer. Most sunscreen formulations, including those with broad spectrum, offer minimal protection in long-wavelength ultraviolet A1 (UVA1; 370-400 nm) and visible light (VL; 400-700 nm) domain. There is limited information regarding the imp...

journal_title：Photochemistry and photobiology

authors： Kohli I,Zubair R,Lyons AB,Nahhas AF,Braunberger TL,Mokhtari M,Ruvolo E,Lim HW,Hamzavi IH

更新日期：2019-11-01 00:00:00

abstract：:We previously reported that Shewanella oneidensis MR-1 is extremely sensitive to natural solar radiation (NSR). Here we analyzed the global transcriptional profile of MR-1 during a 1-h recovering period after exposure to ambient solar light at a dose that yields about 20% survival rate on a Luria-Bertani (LB) plate. W...

journal_title：Photochemistry and photobiology

authors： Qiu X,Tiedje JM,Sundin GW

更新日期：2005-11-01 00:00:00

abstract：:Pterins are heterocyclic compounds with important biological functions, and most of them may exist in two acid-base forms in the pH range between 3 and 13 in aqueous solution. In this work, the photophysical properties of acid and basic forms of six compounds of the pterin family (6-hydroxymethylpterin [HPT], 6-methyl...

journal_title：Photochemistry and photobiology

authors： Cabrerizo FM,Petroselli G,Lorente C,Capparelli AL,Thomas AH,Braun AM,Oliveros E

更新日期：2005-09-01 00:00:00

abstract：:Two-photon laser scanning microscopy (TPLSM) of endogenous reduced nicotinamide adenine dinucleotide (NAD(P)H) provides important information regarding the cellular metabolic state. When imaging the punctate mitochondrial fluorescence originating from NAD(P)H in a rat basophilic leukemia (RBL) cell at low laser powers...

journal_title：Photochemistry and photobiology

authors： Nichols MG,Barth EE,Nichols JA

更新日期：2005-03-01 00:00:00

abstract：:The phototoxic effects of demethylchlortetracycline (DMCT) with UVA radiation on isolated rat liver mitochondria were studied. DMCT at concentration of 21.5 microM with 5.53 x 10(-2) J cm-3 of UVA was found to be a potent uncoupler of oxidative phosphorylation. DMCT alone also uncoupled mitochondria but at higher conc...

journal_title：Photochemistry and photobiology

authors： Takagi S,Mizuno N,Adachi K,Wakabayashi T

更新日期：1990-02-01 00:00:00

abstract：:1-Hydroxybenzotriazole and 1-hydroxypyridine-2-thione were incorporated as ligands with the cluster Ru3(CO)10 (NCMe)2 to give [(mu-H)Ru3(CO)10(mu2-2,3-eta2-NNN(O)C6 H4)] and [(mu-H)Ru3(CO)9(mu2-eta1 : eta2-C5H4N(O)S)], respectively. Irradiation of these two new triruthenium metal clusters individually with 350 nm UV l...

journal_title：Photochemistry and photobiology

authors： Hwu JR,Kuang-Lieh L,Yu SF,Yu LJ,Kumaresan S,Lin KJ,Tsay SC

更新日期：2002-05-01 00:00:00

abstract：:The cellular uptake of Photofrin II (PII) was studied using fluorescence imaging and chemical extraction. The influence of serum and low density lipoproteins (LDL) was examined under a variety of experimental conditions employing cultured human cells of different origins as well as a subcutaneously SMT-F tumor implant...

journal_title：Photochemistry and photobiology

authors： Korbelik M,Hung J,Lam S,Palcic B

更新日期：1990-02-01 00:00:00

abstract：:The maximum erythemal dose rate (EDRmax ) at the Earth's surface tends to occur at local noon. However, clouds can make the timing of EDRmax significantly away from local noon. In fact, EDRmax and its time of occurrence depend mainly on the solar zenith angle at noon (SZAn ), site's altitude, the total ozone column (T...

journal_title：Photochemistry and photobiology

authors： Silva AA,Yamamoto ALC,Corrêa MP

更新日期：2019-05-01 00:00:00

abstract：:Supported silver nanoparticles (Ag NPs) were prepared by chemical reduction method with a sol-gel method. The structure, morphology, and interconnectivity of Ag/TiO2 nanocomposites (NCs) were analyzed using different instrumental techniques. Transmission electron microscopy reveals the Ag NPs have uniformly distribute...

journal_title：Photochemistry and photobiology

authors： Deshmukh SP,Mullani SB,Koli VB,Patil SM,Kasabe PJ,Dandge PB,Pawar SA,Delekar SD

更新日期：2018-11-01 00:00:00

abstract：:Molecular beacons (MB) are becoming more common as sequence-selective detectors of nucleic acids. Although they can easily detect single-base mismatches, they have never been used to directly detect DNA or RNA damage. To measure the degree of ultraviolet (UV) light damage in oligonucleotides, we report a novel MB appr...

journal_title：Photochemistry and photobiology

authors： Yarasi S,McConachie C,Loppnow GR

更新日期：2005-03-01 00:00:00

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：:To clarify the role of the Golgi apparatus in photodynamic therapy-induced apoptosis, its signaling pathway was studied after photodynamic treatment of human cervix carcinoma cell line HeLa, in which a photosensitizer, 2,4,5,7-tetrabromorhodamine 123 bromide (TBR), was incorporated into the Golgi apparatus. Laser scan...

journal_title：Photochemistry and photobiology

authors： Ogata M,Inanami O,Nakajima M,Nakajima T,Hiraoka W,Kuwabara M

更新日期：2003-09-01 00:00:00

abstract：:In the present study, hypericin analogs with an increased hydrophilic character were synthesized. As chemical modifications alter the lipophilicity/hydrophilicity balance together with the photophysical/chemical background of the molecule the influence of these structural changes on the cellular uptake, retention and ...

journal_title：Photochemistry and photobiology

authors： Delaey EM,Obermuëller R,Zupkó I,De Vos D,Falk H,de Witte PA

更新日期：2001-08-01 00:00:00

abstract：:We investigated the effect of the cation-π interaction on the susceptibility of a tryptophan model system toward interaction with singlet oxygen, that is, type II photooxidation. The model system consists of two indole units linked to a lariat crown ether to measure the total rate of removal of singlet oxygen by the i...

journal_title：Photochemistry and photobiology

authors： Arevalo GE,Cagan DA,Monsour CG,Garcia AC,McCurdy A,Selke M

更新日期：2020-11-01 00:00:00