A Sharp Jump in Photocatalytic Activity of Elemental Sulfur for Dye Degradation in Alkaline Solution.

abstract：:Time-resolved reflectance and transmittance spectroscopy was applied to measure in vivo the absorption and transport scattering spectra of the female breast from 610 to 1010 nm. Three measurement configurations were used to probe different breast regions, and data were collected two or three times in each of the five ...

journal_title：Photochemistry and photobiology

authors： Cubeddu R,D'Andrea C,Pifferi A,Taroni P,Torricelli A,Valentini G

更新日期：2000-09-01 00:00:00

abstract：:As the most important interface between human body and external environment, skin acts as an essential barrier preventing various environmental damages, among which DNA-damaging UV radiation from the sun remains the major environmental risk factor causing various skin diseases. It has been well documented that wavelen...

journal_title：Photochemistry and photobiology

authors： Liu H,Yue J,Lei Q,Gou X,Chen SY,He YY,Wu X

更新日期：2015-07-01 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：:Various photosensitizers were grafted by conventional peptide coupling methods to functionalized silica with several macroscopic shapes (powders, films) or embedded in highly transparent and microporous silica xerogel monoliths. Owing to the transparency and free-standing shape of the monoliths, the transient species ...

journal_title：Photochemistry and photobiology

authors： Ronzani F,Saint-Cricq P,Arzoumanian E,Pigot T,Blanc S,Oelgemöller M,Oliveros E,Richard C,Lacombe S

更新日期：2014-03-01 00:00:00

abstract：:The synthesis of some bromine-substituted rhodamine derivatives viz., 4,5-dibromorhodamine methyl ester (dye 2) and 4,5-dibromorhodamine n-butyl ester (dye 3) are reported. These dyes were synthesized to promote a more efficient cancer cell photosensitizer for potential use in in vitro bone marrow purging in preparati...

journal_title：Photochemistry and photobiology

authors： Pal P,Zeng H,Durocher G,Girard D,Li T,Gupta AK,Giasson R,Blanchard L,Gaboury L,Balassy A,Turmel C,Laperrière A,Villeneuve L

更新日期：1996-02-01 00:00:00

abstract：:Demetalation kinetics of bacteriochlorophylls (BChls) c, d and e from green sulfur photosynthetic bacteria were studied under weakly acidic conditions. Demetalation rate constants of BChl e possessing a formyl group at the 7-position were significantly smaller than those of BChls c and d, which had a methyl group at t...

journal_title：Photochemistry and photobiology

authors： Hirai Y,Tamiaki H,Kashimura S,Saga Y

更新日期：2009-09-01 00:00:00

abstract：:In cultured human keratinocytes, the tumor suppressor p53 acts as a control element in the protective response to UVB radiation and is affected by a variety of factors linked to cellular adhesion and differentiation. Because keratinocytes within the epidermis are not a homogeneous population but differ in their prolif...

journal_title：Photochemistry and photobiology

authors： Will K,Neben M,Schmidt-Rose T,Deppert W,Wittern KP,Bergemann J

更新日期：2000-03-01 00:00:00

abstract：:Low-level light therapy has been used in health care as a therapeutic strategy for different diseases. However, its effects on cancer are controversial. This work evaluated the effects of three energies on breast cancer-bearing mice after a single red light-emitting diode (LED) irradiation. 4T1 cells were inoculated i...

journal_title：Photochemistry and photobiology

authors： Pereira ST,Silva CR,Nuñez SC,Ribeiro MS

更新日期：2020-10-03 00:00:00

abstract：:This work evaluated the photoprotective and antigenotoxic effects against ultraviolet B (UVB) radiation of flavonoid compounds apigenin, naringenin and pinocembrin. The photoprotective efficacy of these compounds was estimated using in vitro photoprotection indices, and the antigenotoxicity against UVB radiation was e...

journal_title：Photochemistry and photobiology

authors： García Forero A,Villamizar Mantilla DA,Núñez LA,Ocazionez RE,Stashenko EE,Fuentes JL

更新日期：2019-07-01 00:00:00

abstract：:The energy and oscillator strength of electronic transitions of chlorophyll (Chl)-amino acid complexes were calculated by using molecular orbital methods. The energies varied widely with coordinated amino acids and the difference between the maximum and minimum energy was about 830 cm-1. This energy difference was com...

journal_title：Photochemistry and photobiology

authors： Nishigaki A,Ohshima S,Nakayama K,Okada M,Nagashima U

更新日期：2001-03-01 00:00:00

abstract：:Evidence is mounting that UV-B and UV-A radiation affect skin differently in responses as diverse as erythema and elastosis. We found in this study that collagen metabolism was also differentially affected. Albino hairless mice were irradiated with two UV-A sources: (1) UVASUN 3000 (340-400 nm) for cumulative exposure...

journal_title：Photochemistry and photobiology

authors： Kligman LH,Gebre M

更新日期：1991-08-01 00:00:00

abstract：:Aminopyropheophorbide (APP) is a second generation of photosensitizer for photodynamic therapy (PDT). We demonstrated that APP strongly absorbed red light and, after being taken up by colon cancer cells (HCT-116 cells), was localized in cytoplasmic and internal membranes but not in mitochondria. The APP-mediated photo...

journal_title：Photochemistry and photobiology

authors： Matroule JY,Hellin AC,Morlière P,Fabiano AS,Santus R,Merville MP,Piette J

更新日期：1999-10-01 00:00:00

abstract：:In photodynamic therapy with topically applied delta-aminolevulinic acid porphyrins are acting as photosensitizers. The profile of porphyrin metabolites in normal or in neoplastic skin after administration of delta-aminolevulinic acid has not been determined in detail yet. Thus, to study porphyrin biosynthesis in huma...

journal_title：Photochemistry and photobiology

authors： Fritsch C,Batz J,Bolsen K,Schulte KW,Zumdick M,Ruzicka T,Goerz G

更新日期：1997-07-01 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：:It is generally assumed that a central metal is essential for the efficiency of phthalocyanines in photodynamic therapy (PDT) of cancer. Contrary to the set opinion, the results of the present study indicate that the metal-free sulfonated phthalocyanines (H2PcSn, where n is the number of sulfonate groups per molecule)...

journal_title：Photochemistry and photobiology

authors： Feofanov A,Grichine A,Karmakova T,Kazachkina N,Pecherskih E,Yakubovskaya R,Luk'yanets E,Derkacheva V,Egret-Charlier M,Vigny P

更新日期：2002-05-01 00:00:00

abstract：:Previous studies with methylene blue (MB) in red cell suspensions have demonstrated that extracellular, but not intracellular, virus can be readily photoinactivated. To test if the resistance of intracellular virus to inactivation is related to the permanent positive charge of the phenothiazine, a series of uncharged ...

journal_title：Photochemistry and photobiology

authors： Skripchenko A,Robinette D,Wagner SJ

更新日期：1997-03-01 00:00:00

abstract：:We calculated the integrated UVB and plant damage irradiances for Argentina, a country in the Southern Hemisphere spread over a large latitudinal range. The irradiances were calculated for clear sky days using the Madronich code for the average conditions of the months corresponding to the summer and winter solstices ...

journal_title：Photochemistry and photobiology

authors： Micheletti MI,Piacentini RD

更新日期：2002-09-01 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：:We have compared the cytotoxicity of daunomycin in vitro to highly differentiated normal epithelial cells (Fisher rat thyroid cells, FRTL-5) and to two neoplastic cell lines, a thyroid carcinoma (TK-6) and its lung metastasis (MPTK-6). Whereas the cell lines are equally sensitive to the drug in the dark, if irradiated...

journal_title：Photochemistry and photobiology

authors： Andreoni A,Colasanti A,Kisslinger A,Mastrocinque M,Portella G,Riccio P,Roberti G

更新日期：1993-05-01 00:00:00

abstract：:Vacuum UV (VUV) process is an incipient advanced oxidation process, which can be used for water treatment. This process relies on the formation of hydroxyl radicals through the VUV-induced photolysis of water. In particular, the use of ozone-generating mercury vapor lamps, which emit 10% of the radiation at 185 nm and...

journal_title：Photochemistry and photobiology

authors： Duca C,Imoberdorf G,Mohseni M

更新日期：2014-01-01 00:00:00

abstract：:Solid-state NMR spectroscopy gives a powerful avenue for investigating G protein-coupled receptors and other integral membrane proteins in a native-like environment. This article reviews the use of solid-state (2)H NMR to study the retinal cofactor of rhodopsin in the dark state as well as the meta I and meta II photo...

journal_title：Photochemistry and photobiology

authors： Brown MF,Martínez-Mayorga K,Nakanishi K,Salgado GF,Struts AV

更新日期：2009-03-01 00:00:00

abstract：:The photodynamic effect of hypericin on EMT6 mouse mammary carcinoma cells was investigated in vitro under aerobic and hypoxic conditions. Under aerobic conditions, hypericin-induced photocytotoxicity was dose dependent within a 1-50 microM range. Under hypoxic conditions, cells were resistant to hypericin-induced pho...

journal_title：Photochemistry and photobiology

authors： Thomas C,Pardini RS

更新日期：1992-06-01 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：:The photochemical reactions of the 1-deaza derivative of riboflavin (RF) have been studied by sub-ps time-resolved fluorescence spectroscopy. A potential effect of the solvent polarity and hydrogen bonding capability on the excited state (ES) dynamics was tested by measuring 1-deaza RF in water and, after acetylation ...

journal_title：Photochemistry and photobiology

authors： Slavov C,Mansurova M,Holzwarth AR,Gärtner W

更新日期：2010-01-01 00:00:00

abstract：:This study investigated the effects of low-level laser therapy (LLLT) in the liver function, structure and inflammation in a experimental model of carbon tetrachloride (CCl(4))-induced liver cirrhosis. Wistar rats were divided into Control, LLLT, CCl(4) and CCl(4) +LLLT groups. CCl(4) groups received CCl(4) (0.4 g kg(...

journal_title：Photochemistry and photobiology

authors： Oliveira-Junior MC,Monteiro AS,Leal-Junior EC,Munin E,Osório RA,Ribeiro W,Vieira RP

更新日期：2013-01-01 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：: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：:More scheduled outdoor stay is increasingly advocated for school children. This study measured 2(nd) , 5(th) and 8(th) graders' erythemal UV-exposure in September, March and May at four Swedish schools. We related those exposures, as fractions of total available ambient radiation, to the schools outdoor environments d...

journal_title：Photochemistry and photobiology

authors： Pagels P,Wester U,Söderström M,Lindelöf B,Boldemann C

更新日期：2016-01-01 00:00:00

abstract：:The in vitro cell survival, localization and ultrastructural changes following irradiation were examined in 9L glioma cells sensitized with a new photosensitizer, lysyl chlorin p6 (LCP). In clonogenic assays, LCP was 10-100-fold more phototoxic than photofrin II on a microgram/mL basis. Lysyl chlorin p6 uptake was blo...

journal_title：Photochemistry and photobiology

authors： Leach MW,Higgins RJ,Autry SA,Boggan JE,Lee SJ,Smith KM

更新日期：1993-11-01 00:00:00

abstract：:By a technique which combines rapid mixing of cells and hematoporphyrin (HP) with a short duration of illumination, the photodynamic inactivation of yeast cells was investigated, particularly, in seeking for the information of the location of HP at the time of action. The fluence-survival curves obtained under the con...

journal_title：Photochemistry and photobiology

authors： Ito T

更新日期：1981-10-01 00:00:00