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Fluorescence
Items for "Fluorescence"
Experimental evidence for the influence of the excitation wavelength on the value of the equilibrium constant as determined by Time-Resolved Emission Spectroscopy (TRES)
In the case of a rapid photochemical process, a new theoretical result relating time-resolved emission spectroscopy data to three physical parameters of the chemical system has been recently proposed...
Keywords: Fluorescence, Eu(III), Cm(III), Photochemistry, Equilibrium constant
05/2006 | Radiochimica Acta, Oldenbourg WissenschaftsverlagPreparation of CdSe Quantum Dots in Ionic Liquids
Quantum dots are nanocrystalline semiconductors that have potential applications across many fields ranging from electronics (LEDs, photovoltaics) to the life sciences (fluorescent tags for biological molecules)...
Keywords: Quantum Dots, Ionic Liquids, Fluorescence, Nano Particles
10/2006 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagNovel Insight into the Protonation–Deprotonation Equilibria of Tetracycline and Several Derivatives in Aqueous Solution.
In a recent publication (M. O. Schmitt and S. Schneider [1], Z. Phys. Chem. 220 (2006) 441), we have shown that the principal component analysis of the sets of absorption spectra recorded during a titration cycle (pH2 ↔ pH11) generally yields more than four significant eigenvectors and thus provides evidence for conformational changes at various pH-levels...
Keywords: Tetracyclines, Fluorescence, pH-Titration, Singular Value Decomposition (SVD), Acidity Constants
02/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagDesigning novel spectral classes of proteins with a tryptophan-expanded genetic code
Fluorescence methods are now well-established and powerful tools to study biological macromolecules...
Keywords: analogues, engineering, Fluorescence, genetic code, tryptophan
10/2004 | Biological Chemistry, Walter de GruyterSolvent-induced changes in photochemical activity and conformation of photosystem I particles by glycerol
It has been shown that a large number of water molecules coordinate with the pigments and subunits of photosystem I (PSI); however, the function of these water molecules remains to be clarified...
Keywords: conformational change, Fluorescence, glycerol, oxygen uptake, P700 photooxidation, photosystem I
01/2006 | Biological Chemistry, Walter de GruyterA fluorescence assay for rapid detection of ligand binding affinity to HIV-1 gp41
The fusion-active conformation of the envelope protein gp41 of HIV-1 consists of an N-terminal trimeric ?-helical coiled-coil domain and three anti-parallel C-terminal helices that fold down the grooves of the coiled-coil to form a six-helix bundle...
Keywords: Fluorescence, fusion inhibitors, gp41 peptides, high-throughput screening, metal ion ligation
04/2006 | Biological Chemistry, Walter de GruyterStudies on fluorescence of cellulosics
Steady-state fluorescence emission spectra of various celluloses were measured at an excitation wavelength of 320 nm...
Keywords: acetylation, cellulose, cinnamic acids, cotton linters, Fluorescence, microcrystalline cellulose, sisal
05/2007 | Holzforschung, Walter de GruyterTowards understanding selenocysteine incorporation into bacterial proteins
In bacteria, UGA stop codons can be recoded to direct the incorporation of selenocysteine into proteins on the ribosome...
Keywords: electron cryomicroscopy, Fluorescence, protein synthesis, recoding, ribosome, selenocysteine
10/2007 | Biological Chemistry, Walter de GruyterEffect of photolysis on 17th/18th century paper
Samples of two historical papers from the late 17th and early 18th centuries were irradiated with a 350-nm ?max light source...
Keywords: AFM, brightness, Fluorescence, historical paper, photobleaching, SEM, ultrasonic properties, UV irradiation
03/2007 | Holzforschung, Walter de GruyterFluorescence spectroscopy for chromophore studies on bleached kraft pulps
Fluorescence techniques are highly sensitive and, since aromatic lignin is the most likely source of natural pulp fluorescence, they are suitable for detailed investigation of residual lignin in bleached pulps...
Keywords: bleaching, brightness, brightness reversion, carbonyl, chemical analysis, chromophore, Fluorescence, kraft pulp, residual lignin
08/2007 | Holzforschung, Walter de GruyterFluorescence Investigation of Aggregation Behaviors of Novel Anionic Gemini Surfactants
Steady-state fluorescence and fluorescence quenching measurements have been carried out to investigate the aggregation behavior for four novel alkylbenzene sulfonate gemini surfactants Ib, Ic, Id, and Ie in aqueous solutions at 298.15K...
Keywords: Anionic Gemini Surfactants, CMC, Micropolarity, Aggregation Number, Fluorescence
07/2007 | Zeitschrift für Physikalische Chemie, Oldenbourg WissenschaftsverlagCrystal-structure determination of the fluorescent bisazomethine pigment C36H26N4O4 from X-ray powder data
The compound C36H26N4O4, a derivative of Pigment Yellow 101, is one of the few organic pigments that show fluorescence in the solid state...
Keywords: Lattice energy minimisation, Fluorescence, Rietveld refinement, Powder diffraction structure analysis, X-ray diffraction
10/2007 | Zeitschrift für Kristallographie, Oldenbourg WissenschaftsverlagAn international comparability study to determine the sources of uncertainty associated with a non-competitive sandwich fluorescent ELISA
Keywords: ELISA, Fluorescence, interferon, Uncertainty
07/2008 | Clinical Chemical Laboratory Medicine, Walter de GruyterHeart tissue viability monitoring in vivo by using combined fluorescence, thermography and electrical activity measurements / In vivo Monitoring der Vitalitt von Herzgewebe durch die kombinierte Messung mittels Fluoreszenz, Thermo
A prototype system for in vivo monitoring of the heart tissue viability by using combined measurements of fluorescence, thermography and electrical activity has been elaborated for cardiac surgery...
Keywords: Viability, heart, Fluorescence, NAD(P)H, thermography, Principal component analysis, Vitalitt, Herz, Fluoreszenz, Thermographie, Hauptkomponentenanalyse
12/2005 | Biomedizinische Technik, Walter de Gruyter