Wavelength dependence of histological, physical, and visible changes in chronically UV-irradiated hairless mouse skin.

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：:Ultraviolet radiation (UVR) is hazardous to patients with photosensitive skin disorders, such as lupus erythematosus, xeroderma pigmentosum and skin cancer. As such, these patients are advised to minimize their exposure to UVR. Classically, this is accomplished through careful avoidance of sun exposure and artificial ...

journal_title：Photochemistry and photobiology

authors： Klein RS,Werth VP,Dowdy JC,Sayre RM

更新日期：2009-07-01 00:00:00

abstract：:Light emitted by electronic photographic flash units is shown to damage bacteria and human skin fibroblasts deficient in repair systems, with survival curves very similar to those produced by 254 nm short UV. The lesions induced by these flashes are as photorepairable by the photolyase enzyme as those induced by 254 n...

journal_title：Photochemistry and photobiology

authors： Menezes S,Monteiro C

更新日期：1996-09-01 00:00:00

abstract：:Multichromophoric dyes for use in tumor imaging have been synthesized and photophysically characterized. Structurally, these dyes are dyads and triads that consist of one or two carotenoid polyenes covalently attached to hematoporphyrin (HP) or hematoporphyrin dimethyl ester (HPDME) moieties via ester linkages. The gr...

journal_title：Photochemistry and photobiology

authors： Tatman D,Liddell PA,Moore TA,Gust D,Moore AL

更新日期：1998-10-01 00:00:00

abstract：:Efficient phagocytosis of photoreceptor outer segments (POS) membranes by retinal pigment epithelium (RPE) plays a key role in biological renewal of these highly peroxidizable structures. Here, we tested whether photodynamic treatment, mediated by merocyanine 540 (MC 540), rose Bengal or a zinc-substituted chlorophyll...

journal_title：Photochemistry and photobiology

authors： Olchawa M,Szewczyk G,Zareba M,Piłat A,Bzowska M,Mikołajczyk T,Sarna T

更新日期：2010-07-01 00:00:00

abstract：:Channel and pump rhodopsins use energy from light absorbed by a covalently bound retinal chromophore to transport ions across membranes of microbial cells. Ion transfer steps, including proton transfer, can couple to changes in protein conformational dynamics and water positions. Although general principles of how mic...

journal_title：Photochemistry and photobiology

authors： Bondar AN,Smith JC

更新日期：2017-11-01 00:00:00

abstract：:Photochemo and photodynamic therapies are minimally invasive approaches for the treatment of cancers and powerful weapons for competing bacterial resistance to antibiotics. Synthetic and naturally occurring quinazolinones are considered privileged anticancer and antibacterial agents, with several of them to have emerg...

journal_title：Photochemistry and photobiology

authors： Panagopoulos A,Balalas T,Mitrakas A,Vrazas V,Katsani KR,Koumbis AE,Koukourakis MI,Litinas KE,Fylaktakidou KC

更新日期：2021-01-01 00:00:00

abstract：:Tissue inhibitors of metalloproteinases (TIMPs) are the major endogenous regulators of metalloproteinase activity in tissues. TIMPs are able to inhibit activity of all known matrix metalloproteinases (MMPs) and thus participate in controlling extracellular matrix synthesis and degradation. We showed previously elevate...

journal_title：Photochemistry and photobiology

authors： Ardan T,Němcová L,Bohuslavová B,Klezlová A,Popelka Š,Studenovská H,Hrnčiarová E,Čejková J,Motlík J

更新日期：2016-09-01 00:00:00

abstract：:Endogenous reduced nicotinamide adenine dinucleotide (NADH) fluorescence provides an intrinsic indicator of the cellular metabolic state, but prolonged monitoring is limited by photobleaching and/or phototoxicity. Multiphoton excitation of NADH by ultrashort, 740-nm laser pulses provides a significant improvement over...

journal_title：Photochemistry and photobiology

authors： Tiede LM,Nichols MG

更新日期：2006-05-01 00:00:00

abstract：:The photodegradation of the herbicide clomazone in the presence of S(2)O(8) (2-) or of humic substances of different origin was investigated. A value of (9.4 +/- 0.4) x 10(8) m(-1) s(-1) was measured for the bimolecular rate constant for the reaction of sulfate radicals with clomazone in flash-photolysis experiments. ...

journal_title：Photochemistry and photobiology

authors： David Gara PM,Bosio GN,Arce VB,Poulsen L,Ogilby PR,Giudici R,Gonzalez MC,Mártire DO

更新日期：2009-05-01 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：: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：:Exposure of cultured MRC5 human fibroblasts or NCTC 2544 human keratinocytes to mild doses of ultraviolet A (UVA: 320-400 nm) radiations markedly decreased the actin reactivity with fluorescein-labeled phalloidin. This indicates a change in the degree of polymerization of actin and thus in the organization of actin fi...

journal_title：Photochemistry and photobiology

authors： Djavaheri-Mergny M,Pieraggi MT,Mazière C,Santus R,Lageron A,Salvayre R,Dubertret L,Mazière JC

更新日期：1994-01-01 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：:We studied the effect on the intraocular pressure (IOP) and the ciliary body (CB) morphology after four consecutive contact transcleral photodynamic treatments of the ciliary body (CB-PDT) with verteporfin in pigmented rabbits. Twenty-two pigmented rabbits underwent CB-PDT (study group), performed once (six rabbits) o...

journal_title：Photochemistry and photobiology

authors： Charisis SK,Naoumidi II,Ginis HS,Detorakis ET,Tsilimbaris MK

更新日期：2010-01-01 00:00:00

abstract：:International patterns suggest germ cell testicular cancer (GCTC) incidence may be lower in lower latitudes. To investigate this possibility, we examined GCTC incidence by latitude (population centroid in 2000) for men ≥15 years within two reasonably homogeneous countries, the United States and Australia. In the Unite...

journal_title：Photochemistry and photobiology

authors： Biggar RJ,Baade PD,Sun J,Brandon LE,Kimlin M

更新日期：2016-09-01 00:00:00

abstract：:We conducted a thermovisual comparison of mean hand surface temperature changes upon local heating with two different IR sources. Sixty-six patients with rheumatoid arthritis (47 women and 19 men; average age, 56.1 ± 8.6 years) were subjected to topical heat therapy for one hand with either the standard IR radiator (S...

journal_title：Photochemistry and photobiology

authors： Rutkowski R,Straburzyńska-Lupa A,Korman P,Romanowski W,Gizińska M

更新日期：2011-11-01 00:00:00

abstract：:Direct irradiation of estrone aryl and methyl sulfonates in different organic solvents under nitrogen atmosphere was investigated under steady-state conditions. The estrone derivatives reacted efficiently through the photo-Fries rearrangement reaction involving [1;3]-sulfonyl migration providing the ortho-sulfonyl est...

journal_title：Photochemistry and photobiology

authors： Quindt MI,Gola GF,Ramirez JA,Bonesi SM

更新日期：2021-01-01 00:00:00

abstract：:Herpes simplex virus (HSV) normally causes vescular lesions on mucocutaneous surfaces but can also cause encephalitis. The virus can reactivate from the latent state in neurons to form recrudescent lesions. One common stimulus for reactivation is exposure to sunlight. In the present study, the effects of irradiating r...

journal_title：Photochemistry and photobiology

authors： Garssen J,van der Molen R,de Klerk A,Norval M,van Loveren H

更新日期：2000-11-01 00:00:00

abstract：:The assessment model for ultraviolet radiation and risk "AMOUR" is applied to output from two chemistry-climate models (CCMs). Results from the UK Chemistry and Aerosols CCM are used to quantify the worldwide skin cancer risk avoided by the Montreal Protocol and its amendments: by the year 2030, two million cases of s...

journal_title：Photochemistry and photobiology

authors： van Dijk A,Slaper H,den Outer PN,Morgenstern O,Braesicke P,Pyle JA,Garny H,Stenke A,Dameris M,Kazantzidis A,Tourpali K,Bais AF

更新日期：2013-01-01 00:00:00

abstract：:Low-power lasers are commonly used in human medicine for treatment of various pathological conditions, but mechanisms of their healing effects are still poorly understood. The results of this study provide information related to these effects at the cellular level. Two different protozoan species, Euglena gracilis and...

journal_title：Photochemistry and photobiology

authors： Koutna M,Janisch R,Unucka M,Svobodnik A,Mornstein V

更新日期：2004-11-01 00:00:00

abstract：:Tetraarylporphyrins substituted with nitro groups at beta-pyrrolic positions are potential candidates for electron-accepting pigments in model systems for photosynthesis. The photophysics of 2-nitro-5,10,15,20-tetra-p-tolylporphyrin and its zinc analog have been studied in order to evaluate this potential. The ground ...

journal_title：Photochemistry and photobiology

authors： Gust D,Moore TA,Luttrull DK,Seely GR,Bittersmann E,Bensasson RV,Rougée M,Land EJ,De Schryver FC,Van der Auweraer M

更新日期：1990-04-01 00:00:00

abstract：:The distribution of anthocyanins in grape (Vitis vinifera L.) bunches from the Sangiovese cultivar was measured nondestructively by chlorophyll fluorescence imaging using two excitation light bands at 550 and 650 nm in sequence. The pixel intensity in the derived logarithm of the fluorescence excitation ratio image wa...

journal_title：Photochemistry and photobiology

authors： Agati G,Traversi ML,Cerovic ZG

更新日期：2008-11-01 00:00:00

abstract：:Photodynamic therapy (PDT) is frequently accompanied by induction of systemic immunosuppression. Photochemical mechanisms underlying this effect are not completely understood. Here, we demonstrate the immunosuppressive activity of photooxidation products of protoporphyrin IX dimethyl ester (PPIX) in a murine model of ...

journal_title：Photochemistry and photobiology

authors： Kyagova AA,Mansurova GV,Kozir LA,Ponomarev GV,Pavlov VY,Konstantinov IO,Potapenko AY

更新日期：2005-11-01 00:00:00

abstract：:The effect of pretreatment with vitamin E on cytotoxicity, DNA single strand breaks, and chromosomal aberrations as well as on mutation induced by ultraviolet-B light (UV-B) was investigated in Chinese hamster V-79 cells. Cellular pretreatment with non-toxic levels of 25 microM alpha-tocopherol succinate (vitamin E) f...

journal_title：Photochemistry and photobiology

authors： Sugiyama M,Tsuzuki K,Matsumoto K,Ogura R

更新日期：1992-07-01 00:00:00

abstract：:Our recent study follows up an earlier one which demonstrated hypericin-mediated photocytotoxic effects on HT-29 adenocarcinoma cells by light fractionation with a longer dark pause between two unequal light doses (Sackova, A. [2005] Photochem. Photobiol.81, 1411-1416). Here, we present closer study on events invoked ...

journal_title：Photochemistry and photobiology

authors： Kuliková L,Mikeš J,Hýžďalová M,Palumbo G,Fedoročko P

更新日期：2010-11-01 00:00:00

abstract：:Advanced glycation endproducts (AGEs) have been suggested as photosensitizers that are capable of mediating eye lens photo-damage during aging. In the present work, we investigate the photo-crosslinking and oxidation of bovine lens proteins sensitized by AGEs, with special regard to low oxygen conditions. A mechanisti...

journal_title：Photochemistry and photobiology

authors： Fuentealba D,Friguet B,Silva E

更新日期：2009-01-01 00:00:00

abstract：:The quenching of the benzophenone triplet by lysozyme and its constituent amino acids in aqueous solutions have been studied. Native lysozyme quenches the benzophenone triplet with a high rate constant, 4 x 10(9) M-1 s-1. The quenching process takes place with production of significant amounts of free ketyl radicals, ...

journal_title：Photochemistry and photobiology

authors： Encinas MV,Lissi EA,Vasquez M,Olea AF,Silva E

更新日期：1989-05-01 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：:The nature of the interaction in buffered aqueous solution of several homo and heteroleptic ruthenium(II) polypyridyl complexes containing 2,2'-bipyridine (bpy), 2,2'-bipyrazine (bpz), 1,10-phenanthroline (phen), 4,7-diphenyl-1,10-phenanthroline (dip), 3,4,7,8-tetramethyl-1,10-phenanthroline (tmp), 1,4,5,8-tetraazaphe...

journal_title：Photochemistry and photobiology

authors： Kirsch-De Mesmaeker A,Orellana G,Barton JK,Turro NJ

更新日期：1990-09-01 00:00:00