Ag Nanoparticles Connected to the Surface of TiO2 Electrostatically for Antibacterial Photoinactivation Studies.

abstract：:This study assessed the effects of photobiomodulation (PBM) to cells previously exposed to lipopolysaccharides (LPS). Human gingival fibroblasts (HGF) and epithelial cells (HaCaT) were seeded in wells of 24-well plates containing complete culture medium (DMEM). After 24 h, the DMEM was replaced by serum-free DMEM, and...

journal_title：Photochemistry and photobiology

authors： Pansani TN,Basso FG,Soares DG,Turrioni APDS,Hebling J,de Souza Costa CA

更新日期：2018-05-01 00:00:00

abstract：:Photoautotrophic growth of Chlamydomonas reinhardtii was shown to be independent of the presence of atmospheric oxygen. Under constant light and photoautotrophic conditions, C. reinhardtii grew equally well in either air or 367 PPM CO2-in-He. During 12-h light-dark cycles, the cells in air grew substantially faster th...

journal_title：Photochemistry and photobiology

authors： Graves DA,Spradlin GM,Greenbaum E

更新日期：1990-09-01 00:00:00

abstract：:The photoinduced covalent binding of the title compound to native and heat denatured DNA is described. The level of binding has been measured by UV (for DNA) and atomic absorption (for Rh) analysis. Quantum efficiencies of 6.4 x 10(-4) mol Rh per mol photons and 1.6 x 10(-3) mol Rh per mol photons have been determined...

journal_title：Photochemistry and photobiology

authors： Mahnken RE,Bina M,Deibel RM,Luebke K,Morrison H

更新日期：1989-04-01 00:00:00

abstract：:All-trans retinoic acid (ATRA) plays essential roles in the normal biological processes and the treatment of cancer and skin diseases. Considering its photosensitive property, many studies have been focused on the photochemistry of ATRA. In this study, we investigated the transient phenomena in the laser flash photoly...

journal_title：Photochemistry and photobiology

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

更新日期：2013-09-01 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：:A key challenge for microbiology is to understand how evolution has shaped the wiring of regulatory networks. This is amplified by the paucity of information of power-spectra of physicochemical stimuli to which microorganisms are exposed. Future studies of genome evolution, driven by altered stimulus regimes, will the...

journal_title：Photochemistry and photobiology

authors： van der Steen JB,Hellingwerf KJ

更新日期：2015-09-01 00:00:00

abstract：:Continuous red light controls starch degradation in turions of Spirodela polyrhiza [Dölger, K., U. K. Tirlapur and K.-J. Appenroth [1997] Photochem. Photobiol. 66, 126-127 (1997)]. This light could be replaced by repeated red light pulses with the reciprocity law fulfilled over a large range of fluence rates. The effe...

journal_title：Photochemistry and photobiology

authors： Appenroth KJ,Gabrys H

更新日期：2001-01-01 00:00:00

abstract：:alpha-Crystallin, a major protein of the mammalian lens, plays a vital role in maintaining the structural stability and transparency of the lens. It performs this function through chaperone-like activity; it has recently been reported that heating alpha-crystallin enhances this ability. The present studies, using both...

journal_title：Photochemistry and photobiology

authors： Mandal K,Dillon J,Gaillard ER

更新日期：2000-04-01 00:00:00

abstract：:We have been able to identify a blue fluorophore from the low-molecular weight soluble fraction of human adult nondiabetic brunescent cataract lenses as xanthurenic acid 8-O-beta-D-glucoside (XA8OG) (excitation = 338 nm and emission = 440 nm). To determine the role of this fluorophore in the lens, we have examined its...

journal_title：Photochemistry and photobiology

authors： Thiagarajan G,Shirao E,Ando K,Inoue A,Balasubramanian D

更新日期：2002-09-01 00:00:00

abstract：:A diffusible multitherapy resistance factor (MTRF) is produced by Cloudman S91 melanoma cells in vitro. The MTRF decreases sensitivity of the target cell line, S91/amel, to gamma-irradiation, UVC (200-280 nm) and mitomycin C (MMC). In the present study, we demonstrate that MTRF also increases the survival of S91/amel ...

journal_title：Photochemistry and photobiology

authors： Hill HZ,Hill GJ,Cieszka K,Azure M,Chowdhary I,Sayre RM

更新日期：1995-05-01 00:00:00

abstract：:Quantitative and qualitative changes in dermal collagen and elastin occur in response to chronic ultraviolet (UV) irradiation. These changes have been implicated in the genesis of the wrinkling seen in chronically irradiated, or photoaged skin. We examined the relationship between wrinkle formation and changes in derm...

journal_title：Photochemistry and photobiology

authors： Moloney SJ,Edmonds SH,Giddens LD,Learn DB

更新日期：1992-10-01 00:00:00

abstract：:Vitamin A palmitate has been used in cosmetics; however, studies report that this substance shows photoreactivity that can lead to loss of safety and efficacy. On the other hand, photostabilizers have been used to increase sunscreen photostability and consequently their safety and effectiveness. Thus, this study aimed...

journal_title：Photochemistry and photobiology

authors： Benevenuto CG,Di Matteo MA,Maia Campos PM,Gaspar LR

更新日期：2010-11-01 00:00:00

abstract：:A novel Cs0.33 WO3 /LDHs (CWLDH) composite was synthesized by simple two steps solvothermal method and first investigated as the photocatalyst for tetracycline (TC) and Congo red (CR) degradation under visible light irradiation. The CWLDH heterostructures catalysts were characterized by XRD, UV-Vis, SEM, XPS and BET. ...

journal_title：Photochemistry and photobiology

authors： Zhang D,Ji T,Yu J,Jiang X,Jiao F

更新日期：2018-03-01 00:00:00

abstract：:The photosolvolysis of several biphenyl methanols (Ph-PhCH[Ph]OH) substituted with hydroxy or methoxy groups on the benzene ring not containing the -CH(Ph)OH moiety has been studied in aqueous solution. This work is a continuation of our studies of photosolvolysis of hydroxy-substituted arylmethanols that generate qui...

journal_title：Photochemistry and photobiology

authors： Xu M,Lukeman M,Wan P

更新日期：2006-01-01 00:00:00

abstract：:The Escherichia coli protein YcgF contains a photosensory flavin adenine dinucleotide (FAD)-binding BLUF domain covalently linked to an EAL domain, which is predicted to have cyclic-di-guanosine monophosphate (GMP) phosphodiesterase activity. We have cloned, overexpressed and purified this protein, which we refer to a...

journal_title：Photochemistry and photobiology

authors： Rajagopal S,Key JM,Purcell EB,Boerema DJ,Moffat K

更新日期：2004-11-01 00:00:00

abstract：:A spectral resolution procedure was used to resolve the absorption, excitation and emission spectra of the fluorescein monoanion in a number of solvent-water mixtures. This permitted an analysis of the effect of the solvent environment on the spectral properties of the monoanion and on the lactone/monoanion/dianion tr...

journal_title：Photochemistry and photobiology

authors： Klonis N,Sawyer WH

更新日期：2000-08-01 00:00:00

abstract：:Time-resolved singlet oxygen, O(2)(a(1)Delta(g)), phosphorescence experiments have been performed in single cells upon pulsed laser irradiation of a photosensitizer incorporated into the cell. Data recorded as a function of the partial pressure of ambient oxygen to which the cell is exposed reflect apparent values for...

journal_title：Photochemistry and photobiology

authors： Hatz S,Poulsen L,Ogilby PR

更新日期：2008-09-01 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：:From June to September 2005, we carried out experiments to determine the ultraviolet radiation (UVR) -induced photoinhibition of summer phytoplankton assemblages from a coastal site of the South China Sea. Variability in taxonomic composition was determined throughout the summer, with a peak chlorophyll a (chl a appro...

journal_title：Photochemistry and photobiology

authors： Gao K,Li G,Helbling EW,Villafañe VE

更新日期：2007-07-01 00:00:00

abstract：:The psaI and psaL genes were characterized from the cyanobacterium Synechococcus sp. strain PCC 7002. The gene organization was different from that reported for other cyanobacteria with psaI occurring upstream and being divergently transcribed from the psaL gene. Mutants lacking PsaI or PsaL were generated by interpos...

journal_title：Photochemistry and photobiology

authors： Schluchter WM,Shen G,Zhao J,Bryant DA

更新日期：1996-07-01 00:00:00

abstract：:A targeting strategy based on the selective enzyme-mediated activation of polymeric photosensitizer prodrugs (PPP) within pathological tissue has led to the development of agents with the dual ability to detect and treat cancer. Herein, a detailed study of a simple model system for these prodrugs is described. We prep...

journal_title：Photochemistry and photobiology

authors： Campo MA,Gabriel D,Kucera P,Gurny R,Lange N

更新日期：2007-07-01 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：:Central venous catheters (CVC) are widely used in the United States and are associated with 250,000 to 500,000 CVC-related infections in hospitals annually. We used a catheter made from ultraviolet-C (UVC) transmissive material to test whether delivery of UVC from the lumen would allow inactivation of microorganisms o...

journal_title：Photochemistry and photobiology

authors： Dai T,Tegos GP,St Denis TG,Anderson D,Sinofsky E,Hamblin MR

更新日期：2011-01-01 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：:Carp (Cyprinus carpio) were repeatedly exposed to 0, 60, 120 and 240 mJ/cm2 ultraviolet B (UVB) radiation three times in 1 week (short-term exposure) or 12 times in 4 weeks (long-term exposure). The effect of UVB on the functioning of the carp immune system was studied on day 2 after the final irradiation. After short...

journal_title：Photochemistry and photobiology

authors： Markkula SE,Salo HM,Immonen AK,Jokinen EI

更新日期：2005-05-01 00:00:00

abstract：:We previously reported that a low level of lysosomal photodamage potentiated the phototoxic effect of subsequent mitochondrial photodamage mediated by the benzoporphyrin derivative (BPD) in murine hepatoma 1c1c7 cells. This was attributed to release of Ca2+ from damaged lysosomes and a calpain-mediated conversion of t...

journal_title：Photochemistry and photobiology

authors： Kessel D,Reiners JJ Jr

更新日期：2017-11-01 00:00:00

abstract：:Light is a very important environmental factor that governs many cellular responses in organisms. As a consequence, organisms possess different kinds of light-sensing photoreceptors to regulate their physiological variables and adapt to a given habitat. The cryptochrome/photolyase family (CPF) includes photoreceptors ...

journal_title：Photochemistry and photobiology

authors： Kavakli IH,Baris I,Tardu M,Gül Ş,Öner H,Çal S,Bulut S,Yarparvar D,Berkel Ç,Ustaoğlu P,Aydın C

更新日期：2017-01-01 00:00:00

abstract：:Cyanines are emerging as useful agents for photoreleasing biological compounds because of their capability of utilizing near-infrared (NIR) light. Another benefit is their ability to self-sensitize to produce singlet oxygen for the release of aryl amines, a process that has not been as feasible in the past. Here, we h...

journal_title：Photochemistry and photobiology

authors： Mathew JP,Greer A

更新日期：2019-09-01 00:00:00

abstract：:2-Aminoacetophenone (AAP) was recognized as the key compound for the so-called untypical aging off-flavor (UTA) in Vitis vinifera wines. In this study, it was shown that AAP can be formed by photooxidation of free and protein-bound tryptophan (TRP) in combination with a subsequent storage in model wine. Solutions of T...

journal_title：Photochemistry and photobiology

authors： Horlacher N,Schwack W

更新日期：2014-11-01 00:00:00

abstract：:We investigated the hypothesis that the strength of the activation of the intra-S DNA damage checkpoint varies within the S phase. Synchronized diploid human fibroblasts were exposed to either 0 or 2.5 J m(-2) UVC in early, mid- and late-S phase. The endpoints measured were the following: (1) radio-resistant DNA synth...

journal_title：Photochemistry and photobiology

authors： Chastain PD 2nd,Brylawski BP,Zhou YC,Rao S,Chu H,Ibrahim JG,Kaufmann WK,Cordeiro-Stone M

更新日期：2015-01-01 00:00:00