Behaviors producing photodispersal in Stentor coeruleus.

abstract：:There are controversial reports in the literature concerning the reactivity of singlet oxygen ((1)O(2)) with the redox probe 2',7'-dichlorodihydrofluorescein (DCFH). By carefully preparing solutions in which (1)O(2) is quantitatively generated in the presence of DCFH, we were able to show that the formation rate of th...

journal_title：Photochemistry and photobiology

authors： Daghastanli NA,Itri R,Baptista MS

更新日期：2008-09-01 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：: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：:Organisms living in coastal waters are exposed to anthropogenic contaminants from terrestrial drainage, ice melting and maritime traffic and to enhanced UVB radiation (UVBR; 280-320 nm) caused by decreased concentrations of ozone in the stratosphere. This article reviews available information about the combined effect...

journal_title：Photochemistry and photobiology

authors： Pelletier E,Sargian P,Payet J,Demers S

更新日期：2006-07-01 00:00:00

abstract：:Absolute fluorescence quantum yields are reported for the rhodamine 6G cation and the fluorescein dianion dyes in nine solvents. This information is combined with previously reported fluorescence lifetimes to deduce radiative and nonradiative decay rates. Along the alcohol series from methanol to octanol, rhodamine 6G...

journal_title：Photochemistry and photobiology

authors： Magde D,Wong R,Seybold PG

更新日期：2002-04-01 00:00:00

abstract：:We studied the spectral characteristics of the larvae of three sympatric Belgian species of fireflies, Lampyris noctiluca, Phosphaenus hemipterus and Lamprohiza splendidula. An in vivo spectral study was performed to compare bioluminescence spectra. The emission spectrum of a laboratory reared female L. noctiluca was ...

journal_title：Photochemistry and photobiology

authors： De Cock R

更新日期：2004-04-01 00:00:00

abstract：:Reflectance spectrophotometry from 400 to 800 nm on different cutaneous pigmented lesions, including primary and metastatic malignant melanoma, pigmented nevi, lentigo and seborrhoeic keratosis, has been performed by using an external integrating sphere coupled to a spectrophotometer. Measurements show that reflectanc...

journal_title：Photochemistry and photobiology

authors： Marchesini R,Brambilla M,Clemente C,Maniezzo M,Sichirollo AE,Testori A,Venturoli DR,Cascinelli N

更新日期：1991-01-01 00:00:00

abstract：:Alignment of the primary structures of the hydrozoan photoproteins, aequorin, mitrocomin, clytin and obelin showed very strong amino acid sequence identities. The Ca(2+)-binding sites of the proteins were found to be highly conserved. The Ca(2+)-binding sites were also homologous to the Ca(2+)-binding sites of other C...

journal_title：Photochemistry and photobiology

authors： Tsuji FI,Ohmiya Y,Fagan TF,Toh H,Inouye S

更新日期：1995-10-01 00:00:00

abstract：:The multifunctional polypeptide cyclosporin synthetase (CySyn) remains one of the most complex nonribosomal peptide synthetase described. In this study we used a highly specific photoaffinity labeling procedure with the natural cofactor S-adenosyl-L-methionine (AdoMet), 14C-isotopically labeled at the Sdelta methyl gr...

journal_title：Photochemistry and photobiology

authors： Velkov T,Lawen A

更新日期：2003-02-01 00:00:00

abstract：:Pharmacological therapy is widely used in the treatment of muscle injuries. On the other hand, low-level laser therapy (LLLT) arises as a promising nonpharmacological treatment. The aim of this study was to analyze the effects of sodium diclofenac (topical application) and LLLT on morphological aspects and gene expres...

journal_title：Photochemistry and photobiology

authors： de Almeida P,Lopes-Martins RÁ,Tomazoni SS,Albuquerque-Pontes GM,Santos LA,Vanin AA,Frigo L,Vieira RP,Albertini R,de Carvalho Pde T,Leal-Junior EC

更新日期：2013-03-01 00:00:00

abstract：:Several studies in the literature indicate that histones (lysine rich proteins found associated with DNA in eukaryotic chromatin), as well as poly-L-lysine, can be photocross-linked by ultraviolet (UV) light to DNA in which 5-bromo-2'-deoxyuridine has been substituted for thymidine. To gain some insight into the possi...

journal_title：Photochemistry and photobiology

authors： Shetlar MD,Rose RB,Hom K,Shaw AA

更新日期：1991-05-01 00:00:00

abstract：:The objective of this study was to assess the diagnostic potential of synchronous fluorescence (SF) spectroscopy (SFS) technique for the detection and characterization of normal and different malignancy stages of moderately differentiated squamous cell carcinoma (MDSCC), poorly differentiated squamous cell carcinoma (...

journal_title：Photochemistry and photobiology

authors： Ebenezar J,Aruna P,Ganesan S

更新日期：2010-01-01 00:00:00

abstract：:The aim of this investigation is the evaluation of DNA interaction of with tetraruthenated porphyrin (TRP) and of DNA damage in the presence of light. Direct-fluorescence and electronic absorption measurements after incubation of DNA with TRP indicate strong binding between pBR322 DNA or calf thymus DNA with the modif...

journal_title：Photochemistry and photobiology

authors： Onuki J,Ribas AV,Medeiros MH,Araki K,Toma HE,Catalani LH,Di Mascio P

更新日期：1996-03-01 00:00:00

abstract：:Cypridina luciferase (Cluc), a secreted luminescent protein identified from Cypridina noctiluca, has two N-glycosylation sites. In this study, we evaluated the effects of N-glycosylation on Cluc properties by creating site-directed mutagenic modifications at the consensus sequence for N-glycosylation (Asn-X-Ser/Thr). ...

journal_title：Photochemistry and photobiology

authors： Yasuno R,Mitani Y,Ohmiya Y

更新日期：2018-03-01 00:00:00

abstract：:We report here the design and synthesis of porphyrin-metallocene dyads consisting of a metallocene [either ferrocene or mixed sandwich η(5)-[C5H4(COOH)]Co(η(4)-C4Ph4) connected via an ester linkage at meso phenyl position of either free-base or zinc porphyrin. All these dyad systems were characterized by various spect...

journal_title：Photochemistry and photobiology

authors： Gokulnath S,Achary BS,Kumar CK,Trivedi R,Sridhar B,Giribabu L

更新日期：2015-01-01 00:00:00

abstract：:Photosensitized inhibition of mitochondrial succinoxidase by hypericin was measured in vitro and found to be drug-dose, light-dose, and wavelength dependent. Singlet oxygen generation, monitored using the singlet oxygen trap tetramethylethylene, and oxygen consumption in isolated mitochondria sensitized by hypericin w...

journal_title：Photochemistry and photobiology

authors： Thomas C,MacGill RS,Miller GC,Pardini RS

更新日期：1992-01-01 00:00:00

abstract：:The protein environments surrounding the retinal tune electronic absorption maximum from 350 to 630 nm. Hybrid quantum mechanical/molecular mechanical (QM/MM) methods can be used in calculating excitation energies of retinal in its native protein environments and in studying the molecular basis of spectral tuning. We ...

journal_title：Photochemistry and photobiology

authors： Altun A,Yokoyama S,Morokuma K

更新日期：2008-07-01 00:00:00

abstract：:In this work, the changes in isoflavone levels and the expression of genes involved in their biosynthesis were studied in two Astragalus by UPLC-MS and real-time PCR after 10 days of UV-B treatment (λmax  = 313 nm, 804 J m-2 ). Isoflavones were significantly induced by UV-B irradiation. The influence might be activate...

journal_title：Photochemistry and photobiology

authors： Liu Y,Liu J,Wang Y,Abozeid A,Tian DM,Zhang XN,Tang ZH

更新日期：2018-01-01 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：:The synthesis of a molecule containing hypericin and luciferin moieties joined by a tether is reported. The light-induced (in vitro) antiviral activity as well as the photophysical properties of this new compound are measured and compared with those of the parent compounds, hypericin and pseudohypericin. This tethered...

journal_title：Photochemistry and photobiology

authors： Wen J,Chowdhury P,Wills NJ,Wannemuehler Y,Park J,Kesavan S,Carpenter S,Kraus GA,Petrich JW

更新日期：2002-08-01 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：: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：: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 bimolecular rate constants (k) of quenching of molecular singlet oxygen 1O2 (1 delta g) by organo-selenium compounds exhibiting glutathione peroxidase activity and by sulfur analogs have been determined by time resolved phosphorescence detection of 1O2 in CD3OD and C6D6, with no solvent effect. The rate constants ...

journal_title：Photochemistry and photobiology

authors： Scurlock R,Rougée M,Bensasson RV,Evers M,Dereu N

更新日期：1991-11-01 00:00:00

abstract：:Steady state photolysis and time resolved near infrared luminescence detection were employed to study the reaction kinetics of singlet oxygen with three different lipid-soluble probes incorporated in large unilamellar dioctadecyldimethylammonium chloride (DODAC) vesicles. The probes: 2-(4-(N,N,N-trimethylamine)-butyl)...

journal_title：Photochemistry and photobiology

authors： Zanocco AL,Meléndrez M,Günther G,Lemp E

更新日期：2007-05-01 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：:Photoisomerization of a protein-bound chromophore is the basis of light sensing and signaling in many photoreceptors. Phytochrome photoreceptors can be photoconverted reversibly between the Pr and Pfr states through photoisomerization of the methine bridge between rings C and D. Ground-state heterogeneity of the chrom...

journal_title：Photochemistry and photobiology

authors： Stensitzki T,Yang Y,Wölke AL,Knapp EW,Hughes J,Mroginski MA,Heyne K

更新日期：2017-05-01 00:00:00

abstract：:In the present work, we study the photodynamic action of cercosporin (cerco), a naturally occurring photosensitizer, on human cancer multicellular spheroids. U87 spheroids exhibit double the uptake of cerco than T47D and T98G spheroids as shown by flow cytometry on the single cell level. Moreover, cerco is efficiently...

journal_title：Photochemistry and photobiology

authors： Grigalavicius M,Mastrangelopoulou M,Arous D,Juzeniene A,Ménard M,Skarpen E,Berg K,Theodossiou TA

更新日期：2020-05-01 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：:Confocal laser microspectrofluorometric measurements on human T47D mammary tumor cells have been performed to assess the intracellular distribution of hypericin within the various cell compartments: cytoplasmic membrane, cytoplasm and nucleus. Confocal fluorescence measurements obtained from microvolumes (approximatel...

journal_title：Photochemistry and photobiology

authors： Miskovsky P,Sureau F,Chinsky L,Turpin PY

更新日期：1995-09-01 00:00:00