Interaction between human alpha1-acid glycoprotein (orosomucoid) and 2-p-toluidinylnaphthalene-6-sulfonate.

abstract：:Dark-grown leaves of maize (Zea mays), wheat (Triticum aestivum), wild-type pea (Pisum sativum) and its light-independent photomorphogenesis mutant (lip1) have different proportions of protochlorophyllide (Pchlide) forms as revealed by low-temperature fluorescence emission spectra. Four discrete spectral forms of Pchl...

journal_title：Photochemistry and photobiology

authors： Myśliwa-Kurdziel B,Amirjani MR,Strzałka K,Sundqvist C

更新日期：2003-08-01 00:00:00

abstract：:Catalases are oxidized by singlet oxygen giving rise to more acidic conformers detected in zymograms after electrophoresis in polyacrylamide gels. This shift in catalase mobility can be indicative of singlet oxygen production in vivo. Catalase from human cells, as from many organisms, is susceptible to in vitro modifi...

journal_title：Photochemistry and photobiology

authors： Lledías F,Hansberg W

更新日期：1999-12-01 00:00:00

abstract：:Vitamin D production in human skin occurs only when incident UV radiation exceeds a certain threshold. From simulations of UV irradiances worldwide and throughout the year, we have studied the dependency of the extent and duration of cutaneous vitamin D production in terms of latitude, time, total ozone, clouds, aeros...

journal_title：Photochemistry and photobiology

authors： Engelsen O,Brustad M,Aksnes L,Lund E

更新日期：2005-11-01 00:00:00

abstract：:Collagen was exposed to an ultraviolet (UV) lamp that emitted predominantly in the UVB range. The cross-linking of collagen type I and type IV by UV irradiation was observed. Amino acid analyses revealed that Tyr residues in both collagen types I and IV were decreased by irradiation. In collagen type IV, losses of His...

journal_title：Photochemistry and photobiology

authors： Kato Y,Nishikawa T,Kawakishi S

更新日期：1995-04-01 00:00:00

abstract：:A solution of iodouracil (0.2 mg/mL) and KI (0.1 M) in 0.23 M borate buffer (pH 7) forms triiodide upon exposure to UVB. In the presence of thyodene, the blue starch-iodine complex is formed, the intensity of which is proportional to the amount of UVB exposure. Studies were conducted using either a sunlamp or solar ir...

journal_title：Photochemistry and photobiology

authors： Rahn R,Lee MA

更新日期：1998-08-01 00:00:00

abstract：:The phototoxic anti-hyperlipoproteinemic drug fenofibrate was found to be photolabile under aerobic and anaerobic conditions. Irradiation under argon of a methanol solution of this drug produced the photoproducts isopropyl 4-(1-[4-chlorophenyl]-1,2-dihydroxy)ethylphenoxyisobutyrate, 1,2-bis(4-chlorophenyl)-1,2bis (4-[...

journal_title：Photochemistry and photobiology

authors： Vargas F,Canudas N,Miranda MA,Boscá F

更新日期：1993-10-01 00:00:00

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：:Macroalgae distributed in intertidal zones experience a series of environmental changes, such as periodical desiccation associated with tidal cycles, increasing CO2 concentration and solar UVB (280-315 nm) irradiance in the context of climate change. We investigated how the economic red macroalga, Pyropia haitanensis,...

journal_title：Photochemistry and photobiology

authors： Xu J,Gao K

更新日期：2015-11-01 00:00:00

abstract：:The proton channels of the bacteriorhodopsin (BR) proton pump contain bound water molecules. The channels connect the purple membrane surfaces with the protonated retinal Schiff base at the membrane center. Films of purple membrane equilibrated at low relative humidity display a shift of the 570 nm retinal absorbance ...

journal_title：Photochemistry and photobiology

authors： Renthal R,Gracia N,Regalado R

更新日期：2000-11-01 00:00:00

abstract：:A noninvasive in situ fluorescence-based method for the quantification of the photosensitizer chloroaluminum disulfonated phthalocyanine was compared to the highly accurate but nonreal time ex vivo spectrofluorometry method. Our in vivo fluorescence technique is designed to allow real-time assessment of photosensitize...

journal_title：Photochemistry and photobiology

authors： Lee CC,Pouge BW,Strawbridge RR,Moodie KL,Bartholomew LR,Burke GC,Hoopes PJ

更新日期：2001-09-01 00:00:00

abstract：:Herein, we present a comparative study about the photoinactivation of Staphylococcus aureus (Gram-positive model) and Escherichia coli (Gram-negative model) employing a neutral and a dicationic axially functionalized SiIV -phthalocyanine. Depending on the charge of the siloxane moiety (neutral monosaccharide or cation...

journal_title：Photochemistry and photobiology

authors： Grüner MC,Niemann S,Faust A,Strassert CA

更新日期：2018-09-01 00:00:00

abstract：:The interaction of photodynamic therapy (PDT) with 5-aminolevulinic acid (ALA) and hyperthermia is not well understood. In the present study, significant enhancement of tumor damage was observed after simultaneous application of ALA-PDT and IR-induced hyperthermia using a broad-band incoherent light source. One hour a...

journal_title：Photochemistry and photobiology

authors： Orenstein A,Kostenich G,Kopolovic Y,Babushkina T,Malik Z

更新日期：1999-06-01 00:00:00

abstract：:Photosensitized protein cross-linking has been recently developed to seal wounds and strengthen tissue. Although the photosensitizing dye, Rose Bengal (RB), is phototoxic to cultured cells, cytotoxicity does not accompany RB-photosensitized tissue repair in vivo. We investigated whether the environment surrounding cel...

journal_title：Photochemistry and photobiology

authors： Yao M,Gu C,Doyle FJ Jr,Zhu H,Redmond RW,Kochevar IE

更新日期：2014-03-01 00:00:00

abstract：:The modifications induced by reactive oxygen species (ROS) on fluorescent proteins (FPs) may have important implications for live cell fluorescence imaging. Using quantitative gamma-radiolysis, we have studied the ROS-induced biochemical and photophysical perturbations on recombinant cyan fluorescent protein (CFP). Af...

journal_title：Photochemistry and photobiology

authors： Alvarez L,Levin CH,Merola F,Bizouarn T,Pasquier H,Baciou L,Rusconi F,Erard M

更新日期：2010-01-01 00:00:00

abstract：:We investigated the hypothesis that the strength of the activation of the intra-S DNA damage checkpoint varies within the S phase. Synchronized diploid human fibroblasts were exposed to either 0 or 2.5 J m(-2) UVC in early, mid- and late-S phase. The endpoints measured were the following: (1) radio-resistant DNA synth...

journal_title：Photochemistry and photobiology

authors： Chastain PD 2nd,Brylawski BP,Zhou YC,Rao S,Chu H,Ibrahim JG,Kaufmann WK,Cordeiro-Stone M

更新日期：2015-01-01 00:00:00

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：:Carp (Cyprinus carpio) were repeatedly exposed to 0, 60, 120 and 240 mJ/cm2 ultraviolet B (UVB) radiation three times in 1 week (short-term exposure) or 12 times in 4 weeks (long-term exposure). The effect of UVB on the functioning of the carp immune system was studied on day 2 after the final irradiation. After short...

journal_title：Photochemistry and photobiology

authors： Markkula SE,Salo HM,Immonen AK,Jokinen EI

更新日期：2005-05-01 00:00:00

abstract：:Lymphocytes treated with delta-aminolevulinic acid (ALA) can accumulate the photoactive, fluorescent heme precursor, protoporphyrin IX (PpIX). With visible light illumination, PpIX can be used in photodynamic therapy (ALA-PDT) to kill or functionally alter cells. The aim of this study was to characterize the effects o...

journal_title：Photochemistry and photobiology

authors： Hryhorenko EA,Rittenhouse-Diakun K,Harvey NS,Morgan J,Stewart CC,Oseroff AR

更新日期：1998-05-01 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：:Channel and pump rhodopsins use energy from light absorbed by a covalently bound retinal chromophore to transport ions across membranes of microbial cells. Ion transfer steps, including proton transfer, can couple to changes in protein conformational dynamics and water positions. Although general principles of how mic...

journal_title：Photochemistry and photobiology

authors： Bondar AN,Smith JC

更新日期：2017-11-01 00:00:00

abstract：:We report the spectroscopic properties of fluorescein, x-rhodamine, tetramethyl-rhodamine, attached to single strand, duplex DNA, and to the digestion products by DNAse I. The properties reported include: molar absorptivity, quantum yield, absorbance and fluorescence spectra, fluorescence lifetime, intrinsic lifetime ...

journal_title：Photochemistry and photobiology

authors： Delgadillo RF,Parkhurst LJ

更新日期：2010-03-01 00:00:00

abstract：:Excessive sun exposure can cause sunburn, suntan, skin photoaging, and even skin cancer. Skin photoaging conflicts with the human pursuit of a young and beautiful appearance. Some research data indicate that the incidence of skin cancer in the Chinese has been increasing, although it remains lower than in whites. To e...

journal_title：Photochemistry and photobiology

authors： Wan M,Hu R,Li Y,Wang Y,Xie X,Yue P,Guan L,Lai W

更新日期：2016-09-01 00:00:00

abstract：:In this issue, we offer a symposium-in-print that is focused on several new advancements in fundamental research related to the family of GFP (green fluorescent protein)-like proteins. A few applied aspects are also included to illustrate the impact this amazing set of colored proteins has made on our understanding of...

journal_title：Photochemistry and photobiology

authors： Wachter RM

更新日期：2006-03-01 00:00:00

abstract：:Aqueous solutions of KI were examined for use as chemical actinometers to measure 254 nm (germicidal) radiation. Irradiation results in electron ejection from iodide such that aqueous electrons and iodine atoms are formed. In the presence of N2O, an electron scavenger, recombination of these two reactive species is el...

journal_title：Photochemistry and photobiology

authors： Rahn RO

更新日期：1993-12-01 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：:We performed in situ experiments during the austral summer of 1998 to quantify the mortality of the fresh-water copepod Boeckella gracilipes as a function of the UV dose. The copepods were exposed to solar radiation at the water-surface for approximately 24-34 h. Long-pass cut-off filters (Schott) were used in the exp...

journal_title：Photochemistry and photobiology

authors： Tartarotti B,Cravero W,Zagarese HE

更新日期：2000-09-01 00:00:00

abstract：:Plants protect themselves against excessive light by the induction of Delta pH-dependent nonphotochemical quenching (qE) that is associated with de-epoxidation of violaxanthin (V) to zeaxanthin (Z) in thylakoid membranes. In this work, we report that low light (12 micromol photons m(-2) s(-1)) is sufficient for a mark...

journal_title：Photochemistry and photobiology

authors： Ilík P,Kotabová E,Spundová M,Novák O,Kana R,Strzałka K

更新日期：2010-05-01 00:00:00

abstract：:We present an in vivo study of the optical properties of melanin present in melanocytic nevi of human subjects with Fitzpatrick skin type III (Caucasian descent) using optical spectroscopy. We show that the melanin absorption spectrum exhibits an exponential dependence on wavelength with a decay constant which follows...

journal_title：Photochemistry and photobiology

authors： Zonios G,Dimou A

更新日期：2009-01-01 00:00:00

abstract：:The tetraruthenated porphyrin, mu-[meso-5,10,15,20-tetra(pyridyl)porphyrin]tetrakis[bis-(bipyridine) chloride ruthenium(II)] (TRP) is a supramolecular cationic species. The aim of the present investigation was to evaluate the photodynamic properties of TRP and Zn-TRP to damage DNA with emphasis on the mechanistic aspe...

journal_title：Photochemistry and photobiology

authors： Ravanat JL,Cadet J,Araki K,Toma HE,Medeiros MH,Mascio PD

更新日期：1998-11-01 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