Xanthene dyes induce membrane permeabilization of bacteria and erythrocytes by photoinactivation.

abstract：:Photosensitizer (PS)-antibody conjugates (photoimmunoconjugates, PICs) enable cancer cell-targeted photodynamic therapy (PDT). Nonspecific chemical bioconjugation is widely used to synthesize PICs but gives rise to several shortcomings. The conjugates are heterogeneous, and the process is not easily reproducible. More...

journal_title：Photochemistry and photobiology

authors： Sadiki A,Kercher EM,Lu H,Lang RT,Spring BQ,Zhou ZS

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：:Cyamemazine (CMZ) is a neuroleptic drug that mediates cutaneous phototoxicity in humans. Here, the photobehavior of CMZ has been examined within α1 -acid glycoproteins, β- and γ-cyclodextrins and SDS micelles. In all these microenvironments, CMZ emission was enhanced and blue-shifted, and its lifetime was longer. Irra...

journal_title：Photochemistry and photobiology

authors： Limones-Herrero D,Pérez-Ruiz R,Jiménez MC,Miranda MA

更新日期：2014-09-01 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：: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 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：: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：:Immunosuppressive doses of solar-simulated UV radiation activate lymph node B cells that can suppress primary immunity by inhibiting the function of dendritic cells. The aim of this study was to determine the waveband responsible for activation of these suppressor B cells. We exposed C57BL/6 mice to various doses of e...

journal_title：Photochemistry and photobiology

authors： Byrne SN,Ahmed J,Halliday GM

更新日期：2005-11-01 00:00:00

abstract：:The interaction between human alpha1-acid glycoprotein (orosomucoid) and the fluorescent probe, 2-p-toluidinylnaphthalene-6-sulfonate (TNS) has been studied. An association constant of 16.7 (+/- 3) x 10(3) M-1 was obtained for the complex at 20 degrees C with a stoichiometry of 1:1. From the effect of temperature on t...

journal_title：Photochemistry and photobiology

authors： Albani J,Vos R,Willaert K,Engelborghs Y

更新日期：1995-07-01 00:00:00

abstract：:The exposure of outdoor car guards to solar ultraviolet radiation (UVR), the majority with deeply pigmented skin, to solar UVR was measured for five consecutive days during early spring (September 2017) in South Africa using electronic UVR dosimeters attached to the upper arm of each participant. The exposure of the n...

journal_title：Photochemistry and photobiology

authors： Nkogatse MM,Ramotsehoa MC,Eloff FC,Wright CY

更新日期：2019-01-01 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：:Eumelanin plays a variety of important physiological roles in human skin. However, its structure and fundamental properties still remain poorly understood. Although the absorbance of eumelanin is broad and reveals little about its structure, a variety of techniques have revealed the presence of a disordered array of c...

journal_title：Photochemistry and photobiology

authors： Nighswander-Rempel SP,Mahadevan IB,Rubinsztein-Dunlop H,Meredith P

更新日期：2007-11-01 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：:Exploration of environmental dynamics using intrinsic biological probe tryptophan is very important; however, it suffers from various difficulties. An alternative probe, kynurenine (KN), has been found to be an efficient probe for the ultrafast dynamics in the biological environment (Goswami et al., [2010] J. Phys. Ch...

journal_title：Photochemistry and photobiology

authors： Rakshit S,Goswami N,Pal SK

更新日期：2012-01-01 00:00:00

abstract：:The quantum yield of triplet formation, phi T, and that of the photosensitized formation of singlet molecular oxygen, phi delta, were determined for a rare nucleoside, 4-thiouridine (4t-Urd), in water and in acetonitrile, using singlet molecular oxygen phosphorescence, laser-induced optoacoustics and time-resolved the...

journal_title：Photochemistry and photobiology

authors： Heihoff K,Redmond RW,Braslavsky SE,Rougée M,Salet C,Favre A,Bensasson RV

更新日期：1990-06-01 00:00:00

abstract：:Detergent solubilized bacteriorhodopsin (BR) proteins which contain alterations made by site-directed mutagenesis (Asp-96----Asn, D96N; Asp-85----Asn, D85N; and Arg-82----Gln, R82Q) have been studied with resonance Raman spectroscopy. Raman spectra of the light-adapted (BRLA) and M species in D96N are identical to tho...

journal_title：Photochemistry and photobiology

authors： Lin SW,Fodor SP,Miercke LJ,Shand RF,Betlach MC,Stroud RM,Mathies RA

更新日期：1991-03-01 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：:Raman spectroscopy (RS) has potential for disease classification within the gastrointestinal tract (GI). A near-infrared (NIR) fiber-optic RS system has been developed previously. This study reports the first in vivo Raman spectra of human gastrointestinal tissues measured during routine clinical endoscopy. This was a...

journal_title：Photochemistry and photobiology

authors： Shim MG,Song LM,Marcon NE,Wilson BC

更新日期：2000-07-01 00:00:00

abstract：:Intermolecular interactions of human serum proteins with a hydrophilic nonmetalloporphyrin, 13,17-bis(1-carboxypropionyl)carbomoylethyl-8-ethenyl-2-hydroxy-3-hydroxyiminoethylidene-2,7,12,18-tetramethylporphyrin sodium salt (ATX-S10 (Na)), or a hydrophilic gallium-metalloporphyrin, diethylenetriamine pentaacetic acid ...

journal_title：Photochemistry and photobiology

authors： Yamaguchi M,Tanabe S,Nakajima S,Takemura T,Ogita K,Kuwayama H,Sakata I,Miyaki S,Suzuki K,Namiki H,Uzuka Y,Sarashina T

更新日期：2004-09-01 00:00:00

abstract：:We report the preparation of aminopropyl-functionalized magnesium phyllosilicate (Mg-organoclay) conjugated to fluorescein isothiocyanate (FITC) functionality (FITC-organoclay) by one-pot sol-gel synthesis. The physical characteristics of the Mg- and FITC-organoclays were examined by scanning electron microscopy (SEM)...

journal_title：Photochemistry and photobiology

authors： Lee YC,Lee TH,Han HK,Go WJ,Yang JW,Shin HJ

更新日期：2010-05-01 00:00:00

abstract：:Inflammatory stimuli result in the production of cutaneous eicosanoids, which are known to contribute to the process of tumor promotion. Cyclooxygenase (COX), the rate-limiting enzyme for the production of prostaglandins (PG) from arachidonic acid, exists in at least two isoforms, COX-1 and COX-2. COX-1 is constitutiv...

journal_title：Photochemistry and photobiology

authors： An KP,Athar M,Tang X,Katiyar SK,Russo J,Beech J,Aszterbaum M,Kopelovich L,Epstein EH Jr,Mukhtar H,Bickers DR

更新日期：2002-07-01 00:00:00

abstract：:Cationic polythiophenes have been shown to be potent antimicrobial compounds due to their ability to absorb visible light and sensitize the production of reactive oxygen species (ROS) as well as their ability to selectively associate with and damage negatively charged cell envelopes. This study demonstrates the abilit...

journal_title：Photochemistry and photobiology

authors： Brown DM,Yang J,Strach EW,Khalil MI,Whitten DG

更新日期：2018-11-01 00:00:00

abstract：:Continuous wave and pulsed laser ablation of tissue is described as an explosive event. A subsurface temperature maximum and superheated tissue produce high pressures that eject fragments from the tissue. Decreased water content due to dehydration and vaporization decreases thermal conductivity which reduces heat cond...

journal_title：Photochemistry and photobiology

authors： Welch AJ,Motamedi M,Rastegar S,LeCarpentier GL,Jansen D

更新日期：1991-06-01 00:00:00

abstract：:The effect of pretreatment with vitamin E on cytotoxicity, DNA single strand breaks, and chromosomal aberrations as well as on mutation induced by ultraviolet-B light (UV-B) was investigated in Chinese hamster V-79 cells. Cellular pretreatment with non-toxic levels of 25 microM alpha-tocopherol succinate (vitamin E) f...

journal_title：Photochemistry and photobiology

authors： Sugiyama M,Tsuzuki K,Matsumoto K,Ogura R

更新日期：1992-07-01 00:00:00

abstract：:The efficacy of photodynamic therapy (PDT) depends upon the amount of photosensitizer accumulated in the malignant tissues. Radachlorin is a popular photosensitizer used in photodynamic therapy to treat various types of cancer. In this study, we have studied the main organelles responsible for the accumulation of rada...

journal_title：Photochemistry and photobiology

authors： Biswas R,Moon JH,Ahn JC

更新日期：2014-09-01 00:00:00

abstract：:Photobiologic and synthetic versatility of hydrazones has not yet been established with (1)O2 as a route to commonly encountered nitrosamines. Thus, to determine whether the "parent" reaction of formalhydrazone and (1)O2 leads to facile C=N bond cleavage and resulting nitrosamine formation, we have carried out CCSD(T)...

journal_title：Photochemistry and photobiology

authors： Rudshteyn B,Castillo A,Ghogare AA,Liebman JF,Greer A

更新日期：2014-03-01 00:00:00

abstract：:Polyenic systems are involved in light perception of numerous living organisms. Although a π-conjugated backbone is a common feature of all polyenes, their photophysics may vary. We provide a comparative quantum mechanical study of low-lying S1 and S2 excited states in short (3-5 double bonds) symmetric all-trans line...

journal_title：Photochemistry and photobiology

authors： Dokukina I,Marian CM,Weingart O

更新日期：2017-11-01 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：:G protein-coupled receptors (GPCRs) are involved in the control of virtually all aspects of our behavior and physiology. Activated receptors catalyze nucleotide exchange in heterotrimeric G proteins (composed of alpha.GDP, beta and gamma subunits) on the inner surface of the cell membrane. The GPCR rhodopsin and the G...

journal_title：Photochemistry and photobiology

authors： Chen Y,Herrmann R,Fishkin N,Henklein P,Nakanishi K,Ernst OP

更新日期：2008-07-01 00:00:00

abstract：:A set of linear and asymmetric coumarin-imidazole hybrid compounds having a N,N-diethylamine at 7-position and imidazole at 3-position on the coumarin were synthesized. Insertion of thiophene π-spacer between coumarin and imidazole moieties (5b, 5d) leads to redshifted absorption and emission compared to 5a and 5c. Al...

journal_title：Photochemistry and photobiology

authors： Bhagwat AA,Avhad KC,Patil DS,Sekar N

更新日期：2019-05-01 00:00:00