Simplified calibration for broadband solar ultraviolet radiation measurements.

abstract：:We have demonstrated that it is possible to launch UVC LED light into bacterial contaminated polymer tubes/catheters and disinfect the intraluminal space of these tubes. This can be achieved by UVC treatment of the catheters on a regular basis. Catheters are in the distal end equipped with an exit hole for administrat...

journal_title：Photochemistry and photobiology

authors： Bak J,Jørgensen TM,Helfmann J,Gravemann U,Vorontsova I

更新日期：2011-03-01 00:00:00

abstract：:Herbal extracts including asiatic acid (AA) have become popular candidates of anti-photoaging agents due to their anti-inflammatory and antioxidant properties and minimal side effect. Nevertheless, low bioavailability due to poor solubility limits their practical application. In this study, a highly bioavailable form ...

journal_title：Photochemistry and photobiology

authors： Huang J,Tu T,Wang W,Zhou G,Zhang W,Wu X,Liu W

更新日期：2020-01-01 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：:The azide ion is a strong physical quencher of singlet molecular oxygen (1O2) and is frequently employed to show involvement of 1O2 in oxidation processes. Rate constants (k(q)) for the quenching of 1O2 by azide are routinely used as standards to calculate k(q) values for quenching by other substrates. We have measure...

journal_title：Photochemistry and photobiology

authors： Li MY,Cline CS,Koker EB,Carmichael HH,Chignell CF,Bilski P

更新日期：2001-12-01 00:00:00

abstract：:Luciferin-regenerating enzyme (LRE) contributes to in vitro recycling of D-luciferin. In this study, reinvestigation of the luciferase-based LRE assay is reported. Here, using quick change site-directed mutagenesis seven T-LRE (Lampyris turkestanicusLRE) mutants were constructed and the most functional mutant of T-LRE...

journal_title：Photochemistry and photobiology

authors： Hemmati R,Hosseinkhani S,Sajedi RH,Azad T,Tashakor A,Bakhtiari N,Ataei F

更新日期：2015-07-01 00:00:00

abstract：:Herein, we present a comparative study about the photoinactivation of Staphylococcus aureus (Gram-positive model) and Escherichia coli (Gram-negative model) employing a neutral and a dicationic axially functionalized SiIV -phthalocyanine. Depending on the charge of the siloxane moiety (neutral monosaccharide or cation...

journal_title：Photochemistry and photobiology

authors： Grüner MC,Niemann S,Faust A,Strassert CA

更新日期：2018-09-01 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：:The excited-state intramolecular H-atom transfer reactions of hypocrellins B and A are compared by using time-resolved absorption and fluorescence upconversion techniques. The hypocrellin B photophysics are well described by a simple model involving one ground-state species and excited-state forward and reverse H-atom...

journal_title：Photochemistry and photobiology

authors： Datta A,Smirnov AV,Wen J,Chumanov G,Petrich JW

更新日期：2000-02-01 00:00:00

abstract：:The interaction with amino acids of the excited states of the N-oxide resazurin and its deoxygenation product resorufin, has been studied in aqueous solution at pH 7.5. Steady-state and time-resolved studies show that the fluorescence is quenched by amino acids. Complexation of the dyes in the ground state with aromat...

journal_title：Photochemistry and photobiology

authors： Villegas ML,Bertolotti SG,Previtali CM,Encinas MV

更新日期：2005-07-01 00:00:00

abstract：:Assignment of the fluorescence spectrum of firefly luciferin in aqueous solutions was achieved by utilizing not only emission energies but also theoretical absorption spectra and relative concentrations as estimated by pKa values. Calculated Gibbs free energies were utilized to estimate pKa values. These pKa values we...

journal_title：Photochemistry and photobiology

authors： Hiyama M,Akiyama H,Yamada K,Koga N

更新日期：2014-01-01 00:00:00

abstract：:Excess exposure to UV radiation can affect our health by causing sunburn, skin cancer, etc. It is therefore useful to determine the UV dosage received by people as a way of protecting them from the possible negative effects that this kind of radiation can cause. In this work, the personal outdoor percentage, which sho...

journal_title：Photochemistry and photobiology

authors： Gurrea G,Cañada J

更新日期：2007-11-01 00:00:00

abstract：:The activity of the bimodal fluorescent protein (bmFP) (lambda max, 488 and 517 nm) in the in vitro luciferase reaction has been studied. The bmFP that is produced by Photobacterium phosphoreum strain bmFP is a dimer of two homologous subunits binding four riboflavin 5'-phosphate (FMN)-myristate chromophores. The addi...

journal_title：Photochemistry and photobiology

authors： Karatani H,Konaka T

更新日期：2000-02-01 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：:Photodynamic therapy (PDT) using the second-generation photosensitizer phthalocyanine (Pc) 4 causes mitochondrial damage and induces apoptosis through the release of cytochrome c to the cytosol. Another protein of the mitochondrial intermembrane space, Smac/DIABLO (second mitochondria-derived activator of caspase/dire...

journal_title：Photochemistry and photobiology

authors： Usuda J,Chiu SM,Azizuddin K,Xue LY,Lam M,Nieminen AL,Oleinick NL

更新日期：2002-08-01 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：: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：:Photosynthetic bacteria are attractive for biotechnology because they produce no oxygen and so H2 -production is not inhibited by oxygen as occurs in oxygenic photoorganisms. Rhodopseudomonas palustris and Afifella marina containing BChl a can use irradiances from violet near-UV (VNUV) to orange (350-650 nm) light and...

journal_title：Photochemistry and photobiology

authors： Ritchie RJ

更新日期：2013-09-01 00:00:00

abstract：:The individual tryptophanyl contributions to the near-ultraviolet dichroic activity of apomyoglobin in its native conformation have been resolved. This was accomplished by comparing the spectra of two classes of apomyoglobin with different aromatic residue contents and observing the effect of a specific modification o...

journal_title：Photochemistry and photobiology

authors： Sirangelo I,Irace G,Bismuto E

更新日期：1994-06-01 00:00:00

abstract：:Photoactive materials based on dye molecules incorporated into thin films or bulk solids are useful for applications as photosensitization, photocatalysis, solar cell sensitization and fluorescent labeling, among others. In most cases, high concentrations of dyes are desirable to maximize light absorption. Under these...

journal_title：Photochemistry and photobiology

authors： Rodríguez HB,San Román E

更新日期：2013-11-01 00:00:00

abstract：:The photochemistry of caged compounds of the o-nitrobenzyl type has been investigated thoroughly in the past. However, even recently new side reactions have been discovered. Earlier, we reported [Bley, F., K. Schaper, and H. Görner (2008), Photochem. Photobiol.84 162-171] that we found long-lived triplet states which ...

journal_title：Photochemistry and photobiology

authors： Schaper K,Etinski M,Fleig T

更新日期：2009-09-01 00:00:00

abstract：:Photobiomodulation therapy (PBMT) has anti-inflammatory, analgesic and regenerative properties. This systematic review aimed to critically appraise the published data of in vivo human randomized clinical trials (RCTs), and present a comprehensive overview of the efficacy of PBMT, as an adjunct to the nonsurgical perio...

journal_title：Photochemistry and photobiology

authors： Dalvi S,Benedicenti S,Hanna R

更新日期：2020-10-24 00:00:00

abstract：:The XPA gene-deficient mouse, an animal model of xeroderma pigmentosum (XP), develops enhanced photobiologic reactions including acute inflammation, immunosuppression and skin carcinogenesis, because of the defect in the excision repair of ultraviolet-induced DNA lesions. The results strongly suggest that nuclear DNA ...

journal_title：Photochemistry and photobiology

authors： Horio T,Miyauchi-Hashimoto H,Kuwamoto K,Yamazaki F,Okamoto H

更新日期：2007-01-01 00:00:00

abstract：:Using information on solar irradiance at different latitudes derived from a radiative transfer model and a detailed in vivo action spectrum for immune suppression in a murine system, we report here calculations of the "biologically effective" irradiance of sunlight for immune suppression. From 40 degrees N to 40 degre...

journal_title：Photochemistry and photobiology

authors： De Fabo EC,Noonan FP,Frederick JE

更新日期：1990-10-01 00:00:00

abstract：:Color variants of Ca2+ -regulated photoprotein obelin were shown to be an important tool for dual-analyte binding assay. To provide site-directed conjugation with biospecific molecules, several obelin color mutants carrying unique cysteine residues were obtained and characterized for their novel properties. A pair of ...

journal_title：Photochemistry and photobiology

authors： Krasitskaya VV,Burakova LP,Komarova AA,Bashmakova EE,Frank LA

更新日期：2017-03-01 00:00:00

abstract：:There is a need to improve the selectivity of photodynamic therapy and for better targeting of tumor cells within specific tumor compartments. Selective in vitro phototoxicity of a human bladder carcinoma cell line 647V has been achieved by targeting sulfonated aluminum phthalocyanines (AlSPc) with monoclonal antibodi...

journal_title：Photochemistry and photobiology

authors： Morgan J,Lottman H,Abbou CC,Chopin DK

更新日期：1994-11-01 00:00:00

abstract：:Latia neritoides is a small limpet-like snail that produces a bright green bioluminescence (BL) via a unique light-emitting system. The process, mechanism, and even light emitter of its light emission remain unknown, although this BL has been known for decades. Unlike the other BL systems, neither the luciferin (Luc) ...

journal_title：Photochemistry and photobiology

authors： Yu M,Ohmiya Y,Naumov P,Liu YJ

更新日期：2018-05-01 00:00:00

abstract：:Photodynamic therapy (PDT), carried out at low fluence rates, may enhance tumor response as well as affect treatment selectivity. We have studied the effects of fluence rate on the response of the murine radiation-induced fibrosarcoma (RIF) to PDT using Photofrin (5 mg/kg). Tumor response was tested over a large range...

journal_title：Photochemistry and photobiology

authors： Sitnik TM,Henderson BW

更新日期：1998-04-01 00:00:00

abstract：:A new water-soluble porphyrin derivative, 2,4-bis(1-decyloxyethyl)-deuteroporphyrinyl-6,7-bisaspart ic acid (C10-DP), and its metal complexes (Ga, I(n), Zn, Mn, Cu, Ni and Fe) were examined for their physicochemical properties (absorption, fluorescence, triplet lifetime and partition coefficient) and photocytotoxicity...

journal_title：Photochemistry and photobiology

authors： Ando T,Irie K,Koshimizu K,Takemura T,Nishino H,Iwashima A,Takeda N,Nakajima S,Sakata I

更新日期：1993-04-01 00:00:00

abstract：:In clinical 5-aminolevulinic acid (ALA)-based photodynamic therapy (PDT) of skin tumors it is desirable to develop vehicles that minimize the penetration of ALA through normal stratum corneum and maximize it through the compromised stratum corneum of the tumors to improve tumor selectivity. We have designed a bioadhes...

journal_title：Photochemistry and photobiology

authors： Donnelly RF,Ma LW,Juzenas P,Iani V,McCarron PA,Woolfson AD,Moan J

更新日期：2006-05-01 00:00:00

abstract：:Depletion of the ozone layer leads to increasing UV-B radiation on the earth's surface, which may affect weeds and their responses to herbicides. However, the effect of increased UV-B radiation on weeds and the interaction of weeds and herbicides are still obscure. The objective of this study was to compare glyphosate...

journal_title：Photochemistry and photobiology

authors： Yin L,Zhang M,Li Z,Duan L,Wang S

更新日期：2012-11-01 00:00:00