Relation of Photochemical Internalization to Heat, pH and Ca2+ Ions.

abstract：:We report that exo- and endogenous guanosine 3',5'-cyclic monophosphate (cGMP) specifically influenced the photophobic response. In behavioral experiments the slowly hydrolyzable and membrane-permeable analogs of cGMP (8-bromo-cGMP [Br-cGMP] and N6,2'-o-dibutyryl-cGMP) dramatically prolonged the time for ciliary stop ...

journal_title：Photochemistry and photobiology

authors： Walerczyk M,Fabczak S

更新日期：2001-12-01 00:00:00

abstract：:The thermodynamic parameters for the formation of the free radicals upon electron transfer quenching of the flavin triplet state (3FMN) by tryptophan and tyrosine, Delta(FR)H and Delta(FR)V, were obtained in aqueous solution by the application of laser-induced optoacoustic spectroscopy at various temperatures. The Del...

journal_title：Photochemistry and photobiology

authors： Crovetto L,Martínez-Junza V,Braslavsky SE

更新日期：2006-01-01 00:00:00

abstract：:The synthesis and the properties of 1,4-dibutoxy-2,3-dicyanotriptycene, of a metal-free tetradibenzobarrelenooctabutoxyphthalocyanine, and of the corresponding zinc phthalocyanine are described. The two phthalocyanines do not aggregate when dissolved in benzene at concentrations up to 450 microM. For the metal-free an...

journal_title：Photochemistry and photobiology

authors： Rihter BD,Bohorquez MD,Rodgers MA,Kenney ME

更新日期：1992-05-01 00:00:00

abstract：:Effects of solvent, pH and hydrogen bonding with N-methylimidazole (MIm) on the photophysical properties of 1-hydroxyfluorenone (1HOF) have been studied. Fluorescence lifetime, fluorescence quantum yield and triplet yield measurements demonstrated that intersystem crossing was the dominant process in apolar media and ...

journal_title：Photochemistry and photobiology

authors： Sebok-Nagy K,Biczók L,Morimoto A,Shimada T,Inoue H

更新日期：2004-07-01 00:00:00

abstract：:A novel continuous-flow photocatalytic reactor was designed to decompose toluene by using porous nickel sheets that were coated with a Fe-doped TiO2 catalyst. While locating the UV lamp at the central axis, the catalyst sheets were located along the inner wall and positioned vertically with an equal space of 50 mm alo...

journal_title：Photochemistry and photobiology

authors： Dezhi S,Sheng C,Chung JS,Xiaodong D,Zhibin Z

更新日期：2005-03-01 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：:We report the synthesis of twelve indole derivatives bearing nitro or amide groups via Fischer indole methodology followed by reduction/acetylation and amidation reactions. After thorough characterization, these indoles were subjected to a number of studies in order to evaluate their bioactive potential as photosynthe...

journal_title：Photochemistry and photobiology

authors： de Souza JM,Fazolo BR,Lacerda JWF,Moura MS,Dos Santos ACR,de Vasconcelos LG,de Sousa Junior PT,Dall'Oglio EL,Ali A,Sampaio OM,Vieira LCC

更新日期：2020-11-01 00:00:00

abstract：:Restenosis results from intimal hyperplasia and constrictive remodeling following cardiovascular interventions. Photodynamic therapy (PDT) has been shown to inhibit intimal hyperplasia in vivo by preventing neointimal repopulation of the treated vessel. This study was undertaken in an attempt to further dissect the me...

journal_title：Photochemistry and photobiology

authors： Waterman PR,Overhaus M,Heckenkamp J,Nigri GR,Fungaloi PF,Landis ME,Kossodo SC,LaMuraglia GM

更新日期：2002-01-01 00:00:00

abstract：:The UV radiation environment on planetary surfaces and within atmospheres is of importance in a wide range of scientific disciplines. Solar UV radiation is a driving force of chemical and organic evolution and serves also as a constraint in biological evolution. In this work we modeled the transmission of present and ...

journal_title：Photochemistry and photobiology

authors： Rontó G,Bérces A,Lammer H,Cockell CS,Molina-Cuberos GJ,Patel MR,Selsis F

更新日期：2003-01-01 00:00:00

abstract：:The fluoroquinolone (FQ) antibiotics photosensitize human skin to solar UV radiation and are reported to photosensitize tumor formation in mouse skin. As tumor initiation will not occur without genotoxic insult, we examined the potential of ciprofloxacin, lomefloxacin, fleroxacin, BAYy3118 (a recently developed monofl...

journal_title：Photochemistry and photobiology

authors： Reavy HJ,Traynor NJ,Gibbs NK

更新日期：1997-09-01 00:00:00

abstract：:The mutant T203V of the light driven chloride pump halorhodopsin from Halobacterium salinarum was crystallized and the X-ray structure was solved at 1.6 angstroms resolution. The T203V structure turned out to be nearly identical to the wild type protein with a root mean square deviation of 0.43 angstroms for the carbo...

journal_title：Photochemistry and photobiology

authors： Gmelin W,Zeth K,Efremov R,Heberle J,Tittor J,Oesterhelt D

更新日期：2007-03-01 00:00:00

abstract：:Photodamage to the endoplasmic reticulum (ER) can initiate a death pathway termed paraptosis. The "canonical" model of paraptosis, initiated by certain drugs and other stimuli, requires a brief interval of protein synthesis, involves the action of MAP kinases and can be followed by biochemical markers. The latter incl...

journal_title：Photochemistry and photobiology

authors： Kessel D

更新日期：2020-09-01 00:00:00

abstract：:Cis-urocanic acid (UCA), formed in the epidermis by UV irradiation of trans-UCA, has been implicated as a mediator of the immunosuppression induced by UV exposure of the skin. This review covers recent work in which the wavelength dependence of cis-UCA formation, the interaction of UCA isomers with DNA, the effects of...

journal_title：Photochemistry and photobiology

authors： Norval M,Gibbs NK,Gilmour J

更新日期：1995-08-01 00:00:00

abstract：:Many viral infections reach clinical significance in winter, when it is cold, relative humidity is lowest and vitamin D production from solar ultraviolet-B irradiation is at its nadir. Several autoimmune diseases, such as multiple sclerosis, type 1 diabetes mellitus and asthma, are linked to viral infections. Vitamin ...

journal_title：Photochemistry and photobiology

authors： Grant WB

更新日期：2008-03-01 00:00:00

abstract：:The design, synthesis and application of a new fluorescent-labeling reagent for collagen has been developed as a prerequisite for the design of a photoactivated collagen-crosslinking compound for surgical wound closure. The amine groups in collagen are the targets of a rational design for a new fluorophore because nat...

journal_title：Photochemistry and photobiology

authors： Timberlake GT,Reddy GK,Stehno-Bittel L,Weber JF,Amslinger S,Givens RS

更新日期：2002-11-01 00:00:00

abstract：:Photodimerization of cocrystals of four bispyridylethylenes and two stilbazoles with urea as a template in the solid state has been investigated following our success with thiourea. Four investigated olefins photodimerized quantitatively to a single dimer in the crystalline state only. The reactivity of urea-olefin cr...

journal_title：Photochemistry and photobiology

authors： Bhogala BR,Captain B,Ramamurthy V

更新日期：2015-05-01 00:00:00

abstract：:We recently reported that variations in cellular phototoxicity among a series of alkynyl-substituted zinc trisulfophthalocyanines (ZnPcS3Cn) correlates with their hydrophobicity, with the most amphiphilic derivatives showing the highest cell uptake and phototoxicity. In this study we address the role of the plasma mem...

journal_title：Photochemistry and photobiology

authors： Cauchon N,Nader M,Bkaily G,van Lier JE,Hunting D

更新日期：2006-11-01 00:00:00

abstract：:Liposomes were prepared from mixtures of dipalmitoyl-L-alpha-phosphatidylcholine and up to 40% mol:mol of N-stearoyl-L-histidine (NSH) in the presence of the hydrophobic sensitizer DHE. In the dark such liposomes are stable and retain entrapped salts. On photolysis with visible light, liposomes leak trapped ions at NS...

journal_title：Photochemistry and photobiology

authors： Chowdhary RK,Green CA,Morgan CG

更新日期：1993-09-01 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 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：:The response of normal brain to photodynamic therapy (PDT) was investigated in 62 Fisher rats. The animals were injected i.p. with Photofrin II (12.5 mg/kg). Forty-eight hours following injection, an area of dura 5 mm in diameter over the frontal cortex was photoactivated with red light (632 +/- 2 nm) at 100 mW cm-2, ...

journal_title：Photochemistry and photobiology

authors： Dereski MO,Chopp M,Garcia JH,Hetzel FW

更新日期：1991-07-01 00:00:00

abstract：:Several antibacterial halogenated salicylanilides, including 3,3',4',5-tetrachlorosalicylanilide (TCSA) and 3,4',5-tribromosalicylanilide (TBSA) are known to cause photoallergy. We have carried out photochemical and spin trapping studies to determine whether free radicals may be involved in the photoallergic response....

journal_title：Photochemistry and photobiology

authors： Chignell CF,Sik RH

更新日期：1989-09-01 00:00:00

abstract：:Psoralen is a furocoumarin natural product that intercalates within DNA and forms covalent adducts when activated by ultraviolet radiation. It is well known that this property contributes to psoralen's clinical efficacy in several disease contexts, which include vitiligo, psoriasis, graft-versus-host disease and cutan...

journal_title：Photochemistry and photobiology

authors： Buhimschi AD,Gooden DM,Jing H,Fels DR,Hansen KS,Beyer WF Jr,Dewhirst MW,Walder H,Gasparro FP

更新日期：2020-09-01 00:00:00

abstract：:The red-shift of furocoumarin action spectra, compared with their absorption spectra, has been investigated. An action spectrum for 8-methoxypsoralen (8-MOP) monoadduct formation in the yeast Candida albicans has been determined. The yeast cells were initially exposed to sublethal doses of monochromatic UVA at differe...

journal_title：Photochemistry and photobiology

authors： Baydoun SA,Gibbs NK,Young AR

更新日期：1989-12-01 00:00:00

abstract：:This paper studies the dye-sensitized photooxidation of tyrosine (tyr) and tyr di- and tripeptides (tyr-tyr and tyr-tyr-tyr) mediated by singlet molecular oxygen (O2[1 delta g]) in alkaline media. Photooxidation quantum efficiencies (phi r) were obtained by determining the overall and reactive rate constants of intera...

journal_title：Photochemistry and photobiology

authors： Criado S,Soltermann AT,Marioli JM,García NA

更新日期：1998-10-01 00:00:00

abstract：:Endogenous cellular chromophores absorb ultraviolet A radiation (UVA, 290-320 nm), the major UV component of terrestrial solar radiation, leading to the formation of reactive oxidizing species that initiate apoptosis, gene expression and mutagenesis. UVA-induced apoptosis of T helper cells is believed to underlie the ...

journal_title：Photochemistry and photobiology

authors： Zhuang S,Kochevar IE

更新日期：2003-07-01 00:00:00

abstract：:Porous ZnS and ZnO nano-crystal films were fabricated via a three-step procedure. First, Zn(CH3 COO)2 /Silk Fibroin nanofiber mats were prepared by coaxial electrospinning. Second, Zn(CH3 COO)2 /Silk Fibroin mats were immersed in NaS solution to react with S2- to obtain ZnS/Silk Fibroin nanofiber mats. Finally, ZnO po...

journal_title：Photochemistry and photobiology

authors： Wang H,Liang L,Cheng X,Luo Y,Sun S

更新日期：2018-01-01 00:00:00

abstract：:Novel water-soluble polymeric photosensitizers (SPO) based on starch and containing porphyrin chromophores were synthesized and studied. The polymers were soluble in water and in dimethyl sulfoxide. Photophysical studies and solubilization of molecular probes proved the formation of hydrophobic, rigid microdomains in ...

journal_title：Photochemistry and photobiology

authors： Nowakowska M,Sterzel M,Zapotoczny S

更新日期：2005-09-01 00:00:00

abstract：:Melatonin (N-acetyl-5-methoxytryptamine) is a naturally occurring hormone with a structural resemblance to tryptophan. Its fluorescence is solvent dependent and strongly quenched in the presence of oxygen. Fluorescence quenching in aqueous and organic solutions have been studied in the presence of different quenchers....

journal_title：Photochemistry and photobiology

authors： Rath MC,Mahal HS,Mukherjee T

更新日期：1999-03-01 00:00:00

abstract：:Photodynamic therapy (PDT) of cancer induces oxidative stress, which intervenes in the expression of cytokines by tumor cells. The cytokines might have either a positive or a negative impact on tumor eradication. Here, we studied the expression of cytokines vascular endothelial growth factor (VEGF) and interleukin-1al...

journal_title：Photochemistry and photobiology

authors： Dabkeviciene D,Sasnauskiene A,Leman E,Kvietkauskaite R,Daugelaviciene N,Stankevicius V,Jurgelevicius V,Juodka B,Kirveliene V

更新日期：2012-03-01 00:00:00