Furocoumarin-induced epidermal melanogenesis does not protect against skin photocarcinogenesis in hairless mice.

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：:Herein, we present a study of the pharmacokinetics and biodistribution of a butadiyne-linked conjugated porphyrin dimer (Oxdime) designed to have high near-infrared (NIR) 2-photon absorption cross-section for photodynamic therapy (PDT). Changes in biodistribution over time were monitored in mice carrying B16-F10 melan...

journal_title：Photochemistry and photobiology

authors： Khurana M,Ulrich S,Kim A,Moriyama Y,Netchev G,Akens MK,Anderson HL,Wilson BC

更新日期：2012-11-01 00:00:00

abstract：:In this work, we have quantified for the first time the fluorescence and singlet oxygen quantum yields of a silicon(IV) phthalocyanine bound to the surface of zeolite L nanocrystals. The photophysical properties were correlated with the absorption spectra and the morphology of the nanoparticles, and most importantly, ...

journal_title：Photochemistry and photobiology

authors： Grüner M,Siozios V,Hagenhoff B,Breitenstein D,Strassert CA

更新日期：2013-11-01 00:00:00

abstract：:Unidirectional blue light directs the rhizoid-thallus axis in the apolar zygote of the brown alga, Silvetia compressa. This effect is mediated by an increase in the intracellular concentration of guanosine 3', 5'-cyclic monophosphate. In this study we show the identification of a rhodopsin-like protein, by means of an...

journal_title：Photochemistry and photobiology

authors： Gualtieri P,Robinson KR

更新日期：2002-01-01 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：:Bacteriochlorophyll (BChl) e was coassembled with BChl c in Triton X-100 micelles in aqueous solutions. The Qy absorption bands of the coaggregates were positioned between those of aggregates consisting solely of BChl c or e. The electronic absorption spectra of the coaggregates could not be reproduced by linear combi...

journal_title：Photochemistry and photobiology

authors： Saga Y,Saiki T,Takahashi N,Shibata Y,Tamiaki H

更新日期：2014-05-01 00:00:00

abstract：:Sapphyrins and a series of related porphyrinoid macrocycles have been investigated as potential agents for the treatment of leishmaniasis. The effectiveness of the compounds was evaluated in vitro upon incubation with Leishmania tarentolae or L. panamensis amastigotes and promastigotes. Their effectiveness was also as...

journal_title：Photochemistry and photobiology

authors： Hooker JD,Nguyen VH,Taylor VM,Cedeño DL,Lash TD,Jones MA,Robledo SM,Vélez ID

更新日期：2012-01-01 00:00:00

abstract：:The photoluminescence (PL) of CdSe quantum dots (QD) in aqueous media has been studied in the presence of gold nanoparticles (NP) with different shapes. The steady state PL intensity of CdSe QD (1.5-2 nm in size) is quenched in the presence of gold NP. Picosecond bleach recovery and nanosecond time-resolved luminescen...

journal_title：Photochemistry and photobiology

authors： Nikoobakht B,Burda C,Braun M,Hun M,El-Sayed MA

更新日期：2002-06-01 00:00:00

abstract：:The pharmacokinetics of Zn phthalocyanine (ZnPc) encapsulated in dipalmitoyl-phosphatidylcholine (DPPC) liposomes, injected intravenously in Skh:HR-1 nude mice, was monitored by two in vitro techniques and one in vivo technique, all based on fluorescence spectroscopy. The in vitro methods involve either fluorescence m...

journal_title：Photochemistry and photobiology

authors： Biolo R,Jori G,Kennedy JC,Nadeau P,Pottier R,Reddi E,Weagle G

更新日期：1991-01-01 00:00:00

abstract：:This article is a highlight of the study by Stamenkovic and Hanelt in this issue of Photochemistry and Photobiology describing the high-irradiance photophysiology of several strains of freshwater chlorophyte microalgal genus, Cosmarium. These strains exhibit distinct differences in how combined thermal- high irradianc...

journal_title：Photochemistry and photobiology

authors： Neale P

更新日期：2013-07-01 00:00:00

abstract：:Skin cancer studies depend on questionnaires to estimate exposure to ultraviolet light and subsequent risk but are limited by recall bias. We investigate the feasibility of developing a short checklist of categories comprising outdoor activities that can improve sun exposure questionnaires for use in epidemiologic stu...

journal_title：Photochemistry and photobiology

authors： Kwok RK,Linet MS,Chodick G,Kleinerman RA,Freedman DM,Fears T,Johnson RE,Alexander BH

更新日期：2009-01-01 00:00:00

abstract：:The significance of human cutaneous pigmentation lies in its protective role against sun-induced DNA damage and photocarcinogenesis. Fair skin and red hair are characterized by a low eumelanin to pheomelanin ratio, and have been associated with increased risk of skin cancer. Cutaneous pigmentation is a complex genetic...

journal_title：Photochemistry and photobiology

authors： Dessinioti C,Antoniou C,Katsambas A,Stratigos AJ

更新日期：2011-09-01 00:00:00

abstract：:Differences between global radiation UVER (erythemal ultraviolet solar radiation) received under full sun and diffuse radiation received under the shadow of two types of tree are analyzed to check the importance of these components on human exposure to UV radiation. Blue Line spores dosimeters of VioSpor were used for...

journal_title：Photochemistry and photobiology

authors： Ysasi GG,Ribera LJ

更新日期：2013-05-01 00:00:00

abstract：:Oculocutaneous albinism (OCA) is a genetically inherited autosomal recessive condition. Individuals with OCA lack melanin and therefore are susceptible to the harmful effects of solar ultraviolet radiation, including extreme sun sensitivity, photophobia and skin cancer. OCA is a grave public health issue in sub-Sahara...

journal_title：Photochemistry and photobiology

authors： Wright CY,Norval M,Hertle RW

更新日期：2015-01-01 00:00:00

abstract：:C-Phycocyanin (PC) trimers associated with linker polypeptides were isolated from the phycobilisome (PBS) rods of Synechococcus sp. PCC 7002. LXY refers to a linker polypeptide (L) having an apparent mass of Y kDa, located at position X in the phycobilisome where X can be R (rod), C (core) or RC (rod-core junction). M...

journal_title：Photochemistry and photobiology

authors： Pizarro SA,Sauer K

更新日期：2001-05-01 00:00:00

abstract：:Proton magnetic resonance imaging (MRI) and histological methods were used to evaluate photodynamic therapy (PDT)-induced hemorrhagic necrosis in the murine M1 tumor within 72 h of treatment of male DBA/2 mice. The effects of three photosensitizing drugs were investigated: Photofrin (n = 4), Zn (II) phthalocyanine (n ...

journal_title：Photochemistry and photobiology

authors： Winsborrow BG,Grondey H,Savoie H,Fyfe CA,Dolphin D

更新日期：1997-12-01 00:00:00

abstract：:UV-induced toxicity is characterized by marked oxidative stress, accompanied by the depletion of key cellular antioxidants, particularly glutathione (GSH). Replenishing cellular GSH may represent a means of counteracting UV-induced toxicity: however, treatment with free GSH is not therapeutically effective due to its ...

journal_title：Photochemistry and photobiology

authors： Wright D,Zampagni M,Evangelisti E,Conti S,D'Adamio G,Goti A,Becatti M,Fiorillo C,Taddei N,Cecchi C,Liguri G

更新日期：2013-03-01 00:00:00

abstract：:Photoprotective formulations containing substances with antioxidant properties in combination have been used as a strategy for the improvement of photoaged skin conditions. However, there is a lack of studies evaluating the clinical efficacy of these substances in young women with signs of photoaging. Thus, the object...

journal_title：Photochemistry and photobiology

authors： Fossa Shirata MM,Maia Campos PMBG

更新日期：2021-02-02 00:00:00

abstract：:Elemental sulfur is a low-cost and abundant substance as one of the largest by-products of the oil industry which was widely used in many industrial activities. Cyclo-octasulfur (S8 ) is one of the sulfur allotropes that is a very stable substance in standard conditions. In this study, we report a low-cost and fast me...

journal_title：Photochemistry and photobiology

authors： Peyman VA,Azizian S

更新日期：2020-11-01 00:00:00

abstract：:The immunological consequences of exposure to UVA (320-400 nm) radiation are unclear. This study describes the relationship between the generation of epidermal cis-urocanic acid and the ability to respond to a contact-sensitizing agent, in hairless mice exposed to different UV radiation sources, which incorporate succ...

journal_title：Photochemistry and photobiology

authors： Reeve VE,Boehm-Wilcox C,Bosnic M,Cope R,Ley RD

更新日期：1994-09-01 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：: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

abstract：:UV rays may cause several degrees of skin damage, which makes sunscreen research necessary. In addition, skin sensitivity shows daily variations, which can interfere in the detection of the efficacy of the filters. Here, we studied the UV-induced erythema in hairless rats at two times of the day (light and darkness) u...

journal_title：Photochemistry and photobiology

authors： Flo A,Calpena AC,Díez-Noguera A,Del Pozo A,Cambras T

更新日期：2017-03-01 00:00:00

abstract：:Catalases are oxidized by singlet oxygen giving rise to more acidic conformers detected in zymograms after electrophoresis in polyacrylamide gels. This shift in catalase mobility can be indicative of singlet oxygen production in vivo. Catalase from human cells, as from many organisms, is susceptible to in vitro modifi...

journal_title：Photochemistry and photobiology

authors： Lledías F,Hansberg W

更新日期：1999-12-01 00:00:00

abstract：:Quantum yields for the formation of superoxide ions, O2-., and singlet oxygen, 1O2, were determined during the photolyses of gilvocarcin M (GM) in air-saturated dry dimethylsulfoxide (DMSO) and in 45:55 (vol/vol) DMSO-water mixtures. The quantum yield for the photoreduction of methyl viologen by GM in nitrogen-saturat...

journal_title：Photochemistry and photobiology

authors： Alegría AE,Zayas L,Guevara N

更新日期：1995-09-01 00:00:00

abstract：:A novel laser system has been developed to study the effects of multiple laser pulses of differing wavelengths on cutaneous blood vessels in vivo, using the hamster dorsal skin flap preparation and in vitro, using cuvettes of whole or diluted blood. The system permits sequenced irradiation with well-defined intrapulse...

journal_title：Photochemistry and photobiology

authors： Barton JK,Frangineas G,Pummer H,Black JF

更新日期：2001-06-01 00:00:00

abstract：:Plastoglobules are lipoprotein particles contained in chloroplasts and other plastids. They have long been regarded as lipid storage droplets. New results now indicate that plastoglobules actively participate in prenylquinone and other metabolic pathways. Structural work shows physical attachment of plastoglobules to ...

journal_title：Photochemistry and photobiology

authors： Bréhélin C,Kessler F

更新日期：2008-11-01 00:00:00

abstract：:The pH-insensitive beetle luciferases cloned from Rhagophthalmidae, Phengodidae, and Elateridae exhibit great potential application as reporter assays for monitoring gene expression. At present, however, only one luciferase has been reported from the enigmatic and predominantly Asian distributed luminous family Rhagop...

journal_title：Photochemistry and photobiology

authors： Liu GC,Dong ZW,Hou QB,He JW,Zhao RP,Wang W,Li XY

更新日期：2020-01-01 00:00:00

abstract：:Ultraviolet germicidal irradiation (UVGI) for air disinfection applications has relied on low-pressure mercury vapor lamps for decades. New design requirements have generated the need for alternatives in some uses. This study describes the current state of UVGI technology and describes future directions for technology...

journal_title：Photochemistry and photobiology

authors： Miller SL,Linnes J,Luongo J

更新日期：2013-07-01 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