Effects of demethylchlortetracycline phototoxicity on the structure and functions of rat liver mitochondria.

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：: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：:The binding interactions of three naphthalimide derivatives with heteropoly nucleic acids have been evaluated using fluorescence, absorption and circular dichroism spectroscopies. Mono- and bifunctionalized naphthalimides exhibit sequence-dependent variations in their affinity toward DNA. The heteropoly nucleic acids,...

journal_title：Photochemistry and photobiology

authors： McMasters S,Kelly LA

更新日期：2007-07-01 00:00:00

abstract：:Synovial sarcoma (SS) is one of common malignant soft-tissue tumors and is encountered most commonly in children and young adults. It frequently involves or invades major neurovascular structures and bones, and its local recurrence rate after simple resection has been reported to be as high as up to 80%. Because major...

journal_title：Photochemistry and photobiology

authors： Kusuzaki K,Murata H,Matsubara T,Miyazaki S,Shintani K,Seto M,Matsumine A,Hosoi H,Sugimoto T,Uchida A

更新日期：2005-05-01 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 have studied the photophysics and rotational diffusion of hydrophilic solute 7-(N, N'-diethylamino)coumarin-3-carboxylic acid (7-DCCA) in a room temperature ionic liquid methyltrioctylammonium bis(trifluoromethylsulfonyl) imide ([N1888 ][NTf2 ]). Comparison of activation energies of viscous flow and nonradiative de...

journal_title：Photochemistry and photobiology

authors： Chatterjee A,Maity B,Ahmed SA,Seth D

更新日期：2015-09-01 00:00:00

abstract：:We have compared the distributions of two stable UV photoproducts in nucleosome core DNA at the single-nucleotide level using a T4 polymerase-exonuclease mapping procedure. The distribution of pyrimidine-pyrimidone (6-4) dimers was uncovered by reversing the major UV photo-product, cis-syn cyclobutane pyrimidine dimer...

journal_title：Photochemistry and photobiology

authors： Gale JM,Smerdon MJ

更新日期：1990-04-01 00:00:00

abstract：:The two-photon photolysis of liquid CCl4 with 25 ps pulses of 266 nm light has been studied and compared with similar studies with high energy radiation. Both neutral and ionic species are produced from excited states and ionization. The emphasis of the study is on the ionic processes, while some data related to excit...

journal_title：Photochemistry and photobiology

authors： Zhang G,Thomas JK

更新日期：2006-01-01 00:00:00

abstract：:The pharmacokinetics of Zn phthalocyanine (ZnPc) encapsulated in dipalmitoyl-phosphatidylcholine (DPPC) liposomes, injected intravenously in Skh:HR-1 nude mice, was monitored by two in vitro techniques and one in vivo technique, all based on fluorescence spectroscopy. The in vitro methods involve either fluorescence m...

journal_title：Photochemistry and photobiology

authors： Biolo R,Jori G,Kennedy JC,Nadeau P,Pottier R,Reddi E,Weagle G

更新日期：1991-01-01 00:00:00

abstract：:UV-induced toxicity is characterized by marked oxidative stress, accompanied by the depletion of key cellular antioxidants, particularly glutathione (GSH). Replenishing cellular GSH may represent a means of counteracting UV-induced toxicity: however, treatment with free GSH is not therapeutically effective due to its ...

journal_title：Photochemistry and photobiology

authors： Wright D,Zampagni M,Evangelisti E,Conti S,D'Adamio G,Goti A,Becatti M,Fiorillo C,Taddei N,Cecchi C,Liguri G

更新日期：2013-03-01 00:00:00

abstract：:Ultraviolet germicidal irradiation (UVGI) for air disinfection applications has relied on low-pressure mercury vapor lamps for decades. New design requirements have generated the need for alternatives in some uses. This study describes the current state of UVGI technology and describes future directions for technology...

journal_title：Photochemistry and photobiology

authors： Miller SL,Linnes J,Luongo J

更新日期：2013-07-01 00:00:00

abstract：:A careful study of the linoleic acid hydroperoxide (LOOH) profile obtained upon peroxidation of linoleic acid (LA) photosensitized by tiaprofenic acid (TPA) and analogous ketones has been undertaken to distinguish between type-I and type-II photoperoxidation mechanisms. 1,4-Cyclohexadiene and 1,2-dimethylcyclohexa-2,5...

journal_title：Photochemistry and photobiology

authors： Samadi A,Martínez LA,Miranda MA,Morera IM

更新日期：2001-04-01 00:00:00

abstract：:We examined the effects of daily exposure to UVB on growth, reproduction and histological characteristics of Daphnia magna over two generations at 20, 22, 25 and 30°C. Animals were exposed to 16 h of UVA and photosynthetically active radiation daily. Treated animals received 6 h of UVB during the light phase. Parental...

journal_title：Photochemistry and photobiology

authors： Huebner JD,Loadman NL,Wiegand MD,Huebner E,Palitsky DJ,Husarewycz WH

更新日期：2013-01-01 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：: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：: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：: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：: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：: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：: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 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：:We developed a novel method for the isolation of the PSI-LHCI-LHCII complex from spinach leaves. The supercomplex was resolved into a core complex (CPI), LHCII trimers, LHCI dimers and LHCII monomers using green gel electrophoresis. We then investigate changes in the fluorescence and absorption spectra of PSI-LHCI-LHC...

journal_title：Photochemistry and photobiology

authors： Qin X,Wang W,Wang K,Xin Y,Kuang T

更新日期：2011-01-01 00:00:00

abstract：:The photophysical characteristics of two second-generation PDT photosensitizers, tin ethyl etiopurpurin I (SnET2) and tin octaethylbenzochlorin (SnOEBC), have been measured in homogeneous solution and when bound to bovine serum albumin (BSA). The ground state and triplet state absorption spectra have been characterize...

journal_title：Photochemistry and photobiology

authors： Pogue BW,Redmond RW,Trivedi N,Hasan T

更新日期：1998-12-01 00:00:00

abstract：:In this study, water-soaked seeds of sunflower were exposed to He-Ne laser irradiation of different energies to determine whether or not He-Ne laser irradiation caused changes to seed thermodynamic and germination parameters as well as effects on the activities of germination enzymes. The experiment comprised four ene...

journal_title：Photochemistry and photobiology

authors： Perveen R,Ali Q,Ashraf M,Al-Qurainy F,Jamil Y,Raza Ahmad M

更新日期：2010-09-01 00:00:00

abstract：:The photophysical parameters for the photosensitizer Pd(II) meso-Tetra(4-carboxyphenyl) porphine (PdT790) acquired in a previous study were incorporated into the PDT oxygen diffusion models for cell suspensions and cell monolayers. The time-dependent phosphorescence signals generated by the diffusion models are shown ...

journal_title：Photochemistry and photobiology

authors： Weston MA,Patterson MS

更新日期：2014-11-01 00:00:00

abstract：:In recent years the class of known fluorescent proteins (FPs) has dramatically expanded as an ever-increasing numbers of variants and homologs of the green fluorescent protein (GFP) from Aequorea jellyfish have been either engineered in the lab or discovered in other marine organisms. The red fluorescent protein (RFP)...

journal_title：Photochemistry and photobiology

authors： Li Y,Sierra AM,Ai HW,Campbell RE

更新日期：2008-01-01 00:00:00

abstract：:Persister bacteria tolerate bactericidal antibiotics due to transient and reversible phenotypic changes. As these bacteria can limit the effectiveness of antibiotics to eradicate certain infections, their elimination is a relevant issue. Photodynamic therapy seems suitable for this purpose, but phenotypic tolerance to...

journal_title：Photochemistry and photobiology

authors： Oppezzo OJ,Forte Giacobone AF

更新日期：2018-01-01 00:00:00

abstract：:The individual tryptophanyl contributions to the near-ultraviolet dichroic activity of apomyoglobin in its native conformation have been resolved. This was accomplished by comparing the spectra of two classes of apomyoglobin with different aromatic residue contents and observing the effect of a specific modification o...

journal_title：Photochemistry and photobiology

authors： Sirangelo I,Irace G,Bismuto E

更新日期：1994-06-01 00:00:00

abstract：:C-Phycocyanin (PC) trimers associated with linker polypeptides were isolated from the phycobilisome (PBS) rods of Synechococcus sp. PCC 7002. LXY refers to a linker polypeptide (L) having an apparent mass of Y kDa, located at position X in the phycobilisome where X can be R (rod), C (core) or RC (rod-core junction). M...

journal_title：Photochemistry and photobiology

authors： Pizarro SA,Sauer K

更新日期：2001-05-01 00:00:00

abstract：:Absorbance changes were monitored from 250 to 650 nm during the first microsecond after photolysis of detergent suspensions of bovine rhodopsin at 20 degrees C. Global analysis of the resulting data produced difference spectra for bathorhodopsin, BSI and lumirhodopsin which give the change in absorbance of the aromati...

journal_title：Photochemistry and photobiology

authors： Lewis JW,Jäger S,Kliger DS

更新日期：1997-12-01 00:00:00