Mechanisms for luminol-augmented chemiluminescence from neutrophils induced by leukotriene B4 and N-formyl-methionyl-leucyl-phenylalanine.

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：:Although histochemical and immunohistochemical methods are the standard procedures in diagnosis of lymphoproliferative disorders, useful improvements in evidencing histopathologic manifestations can be obtained with the introduction of tissue autofluorescence analyses. We used microspectrofluorometry and a Multispectr...

journal_title：Photochemistry and photobiology

authors： Rigacci L,Alterini R,Bernabei PA,Ferrini PR,Agati G,Fusi F,Monici M

更新日期：2000-06-01 00:00:00

abstract：:High temperature can promote cyanobacterial blooms, whereas ultraviolet radiation (UVR) can potentially depress cyanobacterial growth by damaging their photosynthetic apparatus. Although the damaging effect of UVR has been well documented, reports on the interactive effects of UV radiation exposure and warming on cyan...

journal_title：Photochemistry and photobiology

authors： Noyma NP,Mesquita MCB,Roland F,Marinho MM,Huszar VLM,Lürling M

更新日期：2021-01-04 00:00:00

abstract：:In horticultural crops, the use of screens to protect plants is the usual strategy in the Mediterranean area. Screen manufacturers offer a range of netting that vary in their UV-absorbing properties. We compared the photoeffects of seven different screens. Sweet pepper trials were conducted at the Gilat Research Cente...

journal_title：Photochemistry and photobiology

authors： Legarrea S,Karnieli A,Fereres A,Weintraub PG

更新日期：2010-03-01 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：: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：:We previously reported that Shewanella oneidensis MR-1 is extremely sensitive to natural solar radiation (NSR). Here we analyzed the global transcriptional profile of MR-1 during a 1-h recovering period after exposure to ambient solar light at a dose that yields about 20% survival rate on a Luria-Bertani (LB) plate. W...

journal_title：Photochemistry and photobiology

authors： Qiu X,Tiedje JM,Sundin GW

更新日期：2005-11-01 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 broad-band normal incidence UVB beam radiation has been measured at Neve Zohar, Dead Sea basin, using a prototype tracking instrument composed of a Model 501A UV-Biometer mounted on an Eppley Solar Tracker Model St-1. The diffuse and beam fraction of the solar global UVB radiation have been determined using the co...

journal_title：Photochemistry and photobiology

authors： Kudish AI,Harari M,Evseev EG

更新日期：2011-01-01 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：:Singlet oxygen reacts preferentially with three amino acids in proteins, His, Trp and Met. In order to study the specific molecular events that result from such oxidations, calf alpha-crystallin was photooxidized in the presence of uroporphyrin and the reactions were investigated by high performance liquid chromatogra...

journal_title：Photochemistry and photobiology

authors： Dillon J,Chiesa R,Wang RH,McDermott M

更新日期：1993-03-01 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 in vivo pharmacokinetics of protoporphyrin IX (PpIX) after administration of 5-aminolevulinic acid (ALA) cannot be described accurately by mathematical models using first-order rate processes. We have replaced first-order reaction rates by dose-dependent (Michaelis-Menten [MM]) reaction rates in a mathematical com...

journal_title：Photochemistry and photobiology

authors： Aalders MC,van der Vange N,Star WM,Sterenborg HJ

更新日期：2001-08-01 00:00:00

abstract：:A visual chromophore analogue, 10-methyl-13-demethyl (dm) retinal, was synthesized and reconstituted with bleached bovine rhodopsin to form a visual pigment derivative with absorbance maximum at 505 nm. The investigations with this new compound were stimulated from recent results using 13-dm retinal as a chromophore t...

journal_title：Photochemistry and photobiology

authors： Koch D,Gärtner W

更新日期：1997-01-01 00:00:00

abstract：:Tin oxide nanoparticles about 4 nm in size were successfully synthesized using hydrothermal method. The photocatalytic activity of the particles was determined by the decolorization of malachite green (MG) and titanium yellow (TY) under UV light. 12 ppm of MG and TY were used for the solution with an initial volume of...

journal_title：Photochemistry and photobiology

authors： Esen B,Yumak T,Sınağ A,Yıldız T

更新日期：2011-03-01 00:00:00

abstract：:The biguanide metformin is widely used for the treatment of Type-II diabetes. Its antiproliferative and pro-apoptotic effects in various tumor cells suggest its potential candidacy for cancer chemoprevention. Herein, we report that metformin significantly inhibited human epidermoid A431 tumor xenograft growth in nu/nu...

journal_title：Photochemistry and photobiology

authors： Chaudhary SC,Kurundkar D,Elmets CA,Kopelovich L,Athar M

更新日期：2012-09-01 00:00:00

abstract：:This research examines the behavior of ground-level solar UV radiation as measured by eight broadband meters in the continental United States during the period from late 1994 to late 1998. The goal is to define the variability that occurs in UV irradiance over time scales ranging from one to several years. The monthly...

journal_title：Photochemistry and photobiology

authors： Frederick JE,Slusser JR,Bigelow DS

更新日期：2000-10-01 00:00:00

abstract：:The photochemistry of Ru(bpy)(3)+2 in the presence of amines was investigated in water by laser flash photolysis. N,N'-Dimethylaniline and p-phenylenediamine quench the luminescent metal to ligand charge transfer (MLCT) excited state of the complex by an electron transfer reaction that produces the semireduced form Ru...

journal_title：Photochemistry and photobiology

authors： Rivarola CR,Bertolotti SG,Previtali CM

更新日期：2006-01-01 00:00:00

abstract：:Comparative study of 13,15-[N-(2-hydroxyethyl)]cycloimide chlorin p6 (2), 13,15-(N-acetoxy)cycloimide chlorin p6 (3), 13,15-(N-hydroxy)cycloimide chlorin p6 methyl ester (4) and 13,15-(N-methoxy)cycloimide chlorin p6 methyl ester (5) together with the previously investigated 13,15-[N-(3-hydroxypropyl)]cycloimide chlor...

journal_title：Photochemistry and photobiology

authors： Feofanov A,Sharonov G,Grichine A,Karmakova T,Pljutinskaya A,Lebedeva V,Ruziyev R,Yakubovskaya R,Mironov A,Refregier M,Maurizot JC,Vigny P

更新日期：2004-02-01 00:00:00

abstract：:Photoautotrophic growth of Chlamydomonas reinhardtii was shown to be independent of the presence of atmospheric oxygen. Under constant light and photoautotrophic conditions, C. reinhardtii grew equally well in either air or 367 PPM CO2-in-He. During 12-h light-dark cycles, the cells in air grew substantially faster th...

journal_title：Photochemistry and photobiology

authors： Graves DA,Spradlin GM,Greenbaum E

更新日期：1990-09-01 00:00:00

abstract：:In the present study, photodynamic activity of a novel photosensitizer (PS), Chlorin e(6)-2.5 N-methyl-d-glucamine (BLC 1010), was evaluated using the chorioallantoic membrane (CAM) as an in vivo model. After intravenous (i.v.) injection of BLC 1010 into the CAM vasculature, the applicability of this drug for photodyn...

journal_title：Photochemistry and photobiology

authors： Pegaz B,Debefve E,Borle F,Ballini JP,Wagnières G,Spaniol S,Albrecht V,Scheglmann D,Nifantiev NE,van den Bergh H,Konan YN

更新日期：2005-11-01 00:00:00

abstract：:Using information on solar irradiance at different latitudes derived from a radiative transfer model and a detailed in vivo action spectrum for immune suppression in a murine system, we report here calculations of the "biologically effective" irradiance of sunlight for immune suppression. From 40 degrees N to 40 degre...

journal_title：Photochemistry and photobiology

authors： De Fabo EC,Noonan FP,Frederick JE

更新日期：1990-10-01 00:00:00

abstract：:In this manuscript, we demonstrate the control of film thickness and surface wettability in the photochemical immobilization of poly (vinyl alcohol) (PVA) to a self-assembled monolayer (SAM) containing a phthalimide chromophore. Surface attachment is characterized by ellipsometry and contact angle measurements. The we...

journal_title：Photochemistry and photobiology

authors： Carroll GT,Turro NJ,Mammana A,Koberstein JT

更新日期：2017-10-01 00:00:00

abstract：:Cyclooxygenase (COX)-2 inhibitors are known to be used as chemopreventative agents against certain malignancies. Thus far, there has been very limited information on whether COX-2 inhibitors protect against chronic narrow-band UVB (NB-UVB)-induced immunosuppression. The present study investigated the effect of nonsele...

journal_title：Photochemistry and photobiology

authors： Wu Y,Tai CL,Wei H,He F,Wang Y,Zhao Y,Chen HD

更新日期：2008-03-01 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：:Previous studies have shown that natural killer (NK) cell activity was suppressed in volunteer subjects exposed to ultraviolet radiation (UVR) from solarium lamps. The present studies were carried out to determine the spectrum of UVR responsible for suppression of NK activity and to develop in vitro methods to analyze...

journal_title：Photochemistry and photobiology

authors： Hersey P,Magrath H,Wilkinson F

更新日期：1993-02-01 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：: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

abstract：:Dermatophytes are fungi that can cause infections (known as tinea) of the skin, hair and nails because of their ability to use keratin. Superficial mycoses are probably the most prevalent of infectious diseases worldwide. One of the most distinct limitations of the current therapeutic options is the recurrence of the ...

journal_title：Photochemistry and photobiology

authors： Smijs TG,Schuitmaker HJ

更新日期：2003-05-01 00:00:00

abstract：:The ultraviolet (UV) component of solar radiation is the driving force of life on earth, but it can cause photoaging and skin cancer. In this study, we investigated the effects of the glucosamine-derivative 2-(N-Acetyl)-L-phenylalanylamido-2-deoxy-β-D-glucose (NAPA) on human primary fibroblasts (FBs) stimulated in vit...

journal_title：Photochemistry and photobiology

authors： Lopreiato M,Cocchiola R,Falcucci S,Leopizzi M,Cardone M,Di Maio V,Brocco U,D'Orazi V,Calvieri S,Scandurra R,De Marco F,Scotto d'Abusco A

更新日期：2020-01-01 00:00:00