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A natural shockwave event led to the formation of a new crystalline polymorph of carbon in gneisses from the Popigai crater, Russia. The new species occupies the interior of a multiphase assemblage and is entirely enveloped by lonsdaleite and graphite. Pol ...
The main aim of this work is to detect metabolites in the brain by means of nuclear magnetic resonance spectroscopy. We were mostly interested by glutathione (GSH) and more particularly by its cysteine part which forms a strongly coupled ABX spins system. ...
Absorption and photoluminescence excitation (PLE) spectra were recorded for colloidal CdSe quantum dots of different sizes. No significant deviation between the PLE and the absorption spectra, provided appropriate corrections and sample treatment are made ...
Nanostructured materials can be defined as those materials whose structural elements - clusters, crystallites or molecules - have dimensions in the 1-100 nm range. The explosion in both academic and industrial interest over the past 20 years arises from th ...
We have measured fluorescence resonance energy transfer (FRET) between a fluorescent antagonist, bound to the purified detergent-solubilized serotonin type 3 receptor, and a lipophilic acceptor probe partitioned into the micelle surrounding the detergent-s ...
During the membrane insertion process the major coat protein of bacteriophage M13 assumes a conformation in which two transmembrane helixes corresponding to the leader sequence and the anchor region in the mature part of the protein coming into close conta ...
Ultrafast spectroscopy was used to study the relaxation processes of charge carriers in ZnO nanocryst. thin films. A broad red-IR absorption band linked to shallowly trapped electrons was obsd. by spectroelectrochem. measurements. Femtosecond transient abs ...
The photophysical properties of the triple-stranded dimetallic helicates [Ln2(LC−2H)3]·H2O (Ln = Nd, Sm, Dy, Yb) are determined in water and D2O solutions, and energy transfer processes are modeled for SmIII. The luminescence of NdIII, SmIII, and YbIII is ...
The photophysical properties of the triple-stranded dimetallic helicates [Ln2(LC−2H)3]·H2O (Ln = Nd, Sm, Dy, Yb) are determined in water and D2O solutions, and energy transfer processes are modeled for SmIII. The luminescence of NdIII, SmIII, and YbIII is ...
The fluorescence lifetime tau and quantum yield eta(f) of isolated red polydiacetylene chains dispersed in their monomer single crystal matrix were measured between 10 and 100 K. tau increases up to 120 ps at 40 K, then rapidly decreases at higher T. eta(f ...
