Abstract:
:The photoinduced covalent binding of the title compound to native and heat denatured DNA is described. The level of binding has been measured by UV (for DNA) and atomic absorption (for Rh) analysis. Quantum efficiencies of 6.4 x 10(-4) mol Rh per mol photons and 1.6 x 10(-3) mol Rh per mol photons have been determined for binding to native and denatured calf thymus DNA, respectively. Levels of bound rhodium as high as 1 molecule per five bases have been achieved. There is no binding of the complex in the absence of light, and there is evidence that at least a portion of the binding may be due to the photolytic conversion of the complex into one or more stable intermediates. Studies with polyribonucleotides indicate a strong preference for binding to the purine bases.
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Mahnken RE,Bina M,Deibel RM,Luebke K,Morrison Hdoi
10.1111/j.1751-1097.1989.tb09204.xsubject
Has Abstractpub_date
1989-04-01 00:00:00pages
519-22issue
4eissn
0031-8655issn
1751-1097journal_volume
49pub_type
杂志文章abstract::DNA UVB dosimeters, consisting of minidots of dried bacteriophage DNA placed on a UV-transparent polymer film, were analyzed by polymerase chain reactions (PCR). Ultraviolet-B dosimetry obtained with amplification of phage lambda DNA of segments of 1.08 kilobase pairs (kbp) and 2.24 kbp was compared with that obtained...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1997.tb03205.x
更新日期:1997-11-01 00:00:00
abstract::Chronic exposure of the gray, short-tailed oppossum, Monodelphis domestica to ultraviolet radiation (UVR) induces mesenchymal tumors of the cornea. High molecular weight DNA samples from 6 UVR-induced corneal tumors were assayed for their ability to transform NIH 3T3 cells to tumorigenicity. NIH 3T3 cells transfected ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1992.tb04256.x
更新日期:1992-03-01 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
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1990.tb08686.x
更新日期:1990-10-01 00:00:00
abstract::Ultraviolet radiation can inhibit immune responses locally as well as systemically. Such effects have been measured in animals and humans exposed to ultraviolet B (wavelength 280-315 nm) (UVB) and ultraviolet A (315-400 nm) (UVA). The precise wavelength dependence is important for the identification of possible molecu...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/0031-8655(2001)073<0432:UEAUAC>2.0.CO;2
更新日期:2001-04-01 00:00:00
abstract::The octahedral rhodium complex, cis-dichloro bis(1,10 phenanthroline)rhodium(III) chloride (BISPHEN), is known to form covalent linkages with DNA involving the attachment of the metal to a base. In order to determine the sequence selectivity of this chemistry, solutions of the complex containing one of the double-stra...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/0031-8655(2000)072<0731:hsawtp>2.0.co;2
更新日期:2000-12-01 00:00:00
abstract::Continuous red light controls starch degradation in turions of Spirodela polyrhiza [Dölger, K., U. K. Tirlapur and K.-J. Appenroth [1997] Photochem. Photobiol. 66, 126-127 (1997)]. This light could be replaced by repeated red light pulses with the reciprocity law fulfilled over a large range of fluence rates. The effe...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/0031-8655(2001)073<0077:lisdin>2.0.co;2
更新日期:2001-01-01 00:00:00
abstract::Limited trypsinization of large pea (Pisum sativum cv. Alaska) phytochrome and subsequent size-exclusion chromatography (SEC) in 0.1 M Na phosphate, pH 7.8, yielded a high-molecular-mass aggregate of tryptic fragments of phytochrome. Further SEC in 0.1 M Tris-HCl, pH 7.5, plus various concentrations of NaSCN, indicate...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1989.tb04136.x
更新日期:1989-07-01 00:00:00
abstract::Various photosensitizers were grafted by conventional peptide coupling methods to functionalized silica with several macroscopic shapes (powders, films) or embedded in highly transparent and microporous silica xerogel monoliths. Owing to the transparency and free-standing shape of the monoliths, the transient species ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/php.12166
更新日期:2014-03-01 00:00:00
abstract::Tetraarylporphyrins substituted with nitro groups at beta-pyrrolic positions are potential candidates for electron-accepting pigments in model systems for photosynthesis. The photophysics of 2-nitro-5,10,15,20-tetra-p-tolylporphyrin and its zinc analog have been studied in order to evaluate this potential. The ground ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1990.tb01733.x
更新日期:1990-04-01 00:00:00
abstract::The photodegradation of the S(+)- and R(-)-ketoprofen (KP) enantiomers in the bovine serum albumin matrix was studied by steady-state photolysis with the use of lambda(irr) > 320 nm and transient absorption spectroscopy with lambda(exc) = 355 nm, at 1/1 and 2/1 KP/BSA molar ratios. R(-)-KP was found to be more labile ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/2005-07-11-RA-608
更新日期:2006-01-01 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
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1990.tb01732.x
更新日期:1990-04-01 00:00:00
abstract::Photodynamic treatment is often thought to produce reactive oxygen species (ROS) that directly induce killing; the nomenclature and phrases revolve around such notions of light-dependency. Few studies reference the possible existence of oxidation products formed in secondary reactions, which bear cytotoxicity competit...
journal_title:Photochemistry and photobiology
pub_type: 评论,杂志文章
doi:10.1111/php.12984
更新日期:2019-01-01 00:00:00
abstract::UVB radiation contributes to both direct and indirect damage to the skin including the generation of free radicals and reactive oxygen species (ROS), inflammatory responses, immunosuppression and gene mutations, which can ultimately lead to photocarcinogenesis. A plant-derived flavonoid, baicalin, has been shown to ha...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/php.12505
更新日期:2015-11-01 00:00:00
abstract::The process of photoinduced hydroxylaminolysis has been re-examined in different bacteriorhodopsin (BR)-based media using O-substituted hydroxylamines, in particular, O-(4-nitrobenzyl) hydroxylamine hydrochloride (NBHA), O-(2,3,4,5,6-pentafluorobenzyl) hydroxylamine hydrochloride (FBHA) and O-(t-butyl) hydroxylamine h...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.2010.00817.x
更新日期:2010-11-01 00:00:00
abstract::This review deals with the biophysical aspects of flavin-based photosensors, comprising cryptochromes, LOV (Light, Oxygen and Voltage) and BLUF (Blue Light sensing Using FAD) proteins. Special emphasis is given to structural issues, photocycle quantum yields and energetics, mechanism of the light-triggered reactions, ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章,评审
doi:10.1111/j.1751-1097.2007.00196.x
更新日期:2007-11-01 00:00:00
abstract::The photochemical reactions of the 1-deaza derivative of riboflavin (RF) have been studied by sub-ps time-resolved fluorescence spectroscopy. A potential effect of the solvent polarity and hydrogen bonding capability on the excited state (ES) dynamics was tested by measuring 1-deaza RF in water and, after acetylation ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.2009.00646.x
更新日期:2010-01-01 00:00:00
abstract::Chaetopterus variopedatus has been studied for over a century in terms of its physiology, ecology and life history. One focus of research is on its intrinsic bioluminescent emissions, which can be observed as a blue light emitted from the extremities of individual body segments, or as a secreted mucus. Even though res...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章,评审
doi:10.1111/php.13221
更新日期:2020-07-01 00:00:00
abstract::Plant responses to light spectral quality can be exploited to deliver a range of agronomically desirable end points in protected crops. This can be achieved using plastics with specific spectral properties as crop covers. We have studied the responses of a range of crops to plastics that have either (a) increased tran...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/2004-12-06-RA-392
更新日期:2005-09-01 00:00:00
abstract::Polysulphone (PS) dosimetry has been a widely used technique for more than 30 years to quantify the erythemally effective UV dose received by anatomic sites (personal exposure). The calibration of PS dosimeters is an important issue as their spectral response is different from the erythemal action spectrum. It is perf...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.2011.01006.x
更新日期:2012-01-01 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
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1993.tb02303.x
更新日期:1993-02-01 00:00:00
abstract::Abstract- Time-resolved transmittance was used to extract in vivo optical properties of leaves of green plants experimentally. In time-resolved transmittance measurements an ultrashort light pulse is directed onto the surface of the object and the transmitted light is measured with a time resolution in the range of pi...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1999.tb03281.x
更新日期:1999-02-01 00:00:00
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
pub_type: 杂志文章
doi:10.1562/0031-8655(2003)078<0205:flopip>2.0.co;2
更新日期:2003-08-01 00:00:00
abstract::Light signals trigger precise changes in gene expression networks that activate distinctive developmental programs in plants. The transcriptome is shaped at different stages, both by the regulation of gene expression and also by posttranscriptional mechanisms that alter the sequence or abundance of the transcripts gen...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章,评审
doi:10.1111/php.12762
更新日期:2017-05-01 00:00:00
abstract::Pheophorbide a-induced photo-oxidation, in vitro, of cytochrome c oxidase and cytochrome c results in irreversible modifications to both protein components. Photo-oxidation of cytochrome c, as exhibited by change in its heme oxidation state, displays exponential kinetics and is detected with a lag period. Both the pho...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1992.tb04229.x
更新日期:1992-02-01 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
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1993.tb04986.x
更新日期:1993-12-01 00:00:00
abstract::N2-hydroxyisocytosine and 1-methyl-N2-hydroxyisocytosine were studied using a matrix isolation technique combined with infrared absorption spectroscopy. For N2-hydroxyisocytosine isolated in an Ar matrix (at 10 K), two imino-oxo isomers, one with the hydroxyimino =N-OH group directed toward the N1-H group (the form ca...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1562/0031-8655(2003)077<0243:psairi>2.0.co;2
更新日期:2003-03-01 00:00:00
abstract::Irradiation with 365 nm light of Wi26VA4 SV40-transformed human fibroblasts cultured for 24 h in the presence of low density lipoproteins loaded with the anticancer porphyrin mixture Photofrin II resulted in a near complete inhibition of [14C]oleic acid incorporation into triacylglycerols, cholesteryl esters and phosp...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/j.1751-1097.1992.tb04209.x
更新日期:1992-01-01 00:00:00
abstract::A 2-year field study on the effect of different light environments, obtained by using cladding materials (polyethylene films and shade net) able to cut off specific regions of the photosynthetically active radiation and ultraviolet wavebands, on the growth and phenylpropanoids content of Achillea collina grown in the ...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:10.1111/php.12150
更新日期:2014-01-01 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
pub_type: 杂志文章
doi:10.1111/php.13013
更新日期:2018-11-01 00:00:00
abstract::The temperature dependence of the uptake phase of 5-aminolevulinic acid (ALA) and the following production phase of protoporphyrin IX (PpIX) in normal mouse skin was investigated. A cream containing 20% ALA was topically applied on the skin for 10 min. The amount of ALA-induced PpIX was evaluated by measuring the fluo...
journal_title:Photochemistry and photobiology
pub_type: 杂志文章
doi:
更新日期:1999-04-01 00:00:00