6814 Suchergebnisse für: „“

Fiber and cavity enhanced Raman spectroscopic sensing of gases and pharmaceuticals

Acousto-Optic Notch Filter Dynamically Induced in a Chirped Fiber Bragg Grating

A notch filter acoustically induced in a 1-cm-longchirped fiber Bragg grating is experimentally investigated.The notch reflectivity (−5.8 to −32 dB) and the bandwidth(2.2 to 1.3 nm) are tuned by an...

Ultrafast in cellulo photoinduced dynamics processes of the paradigm molecular light switch[Ru(bpy)2dppz]2+

An in cellulo study of the ultrafast excited state processes in the paradigm molecular light switch [Ru(bpy)2dppz]2+ by localized pump-probe spectroscopy is reported for the first time. The localization...

Characterization of emergent Shiga toxin-producing Escherichia coli strains isolated from a Chilean and imported vacuum packaged beef distributed in Santiago, Chile

Shiga toxin-producing Escherichia coli (STEC) strains are an emerging zoon otic pathogen, associated with foodborne outbreaks. STEC can cause acute diarrhea, bloody diarrhea and/or hemolytic uremic syndrome...

Determination of side products in the photocatalytic generation of hydrogen with copper photosensitizers by resonance Raman spectroelectrochemistry

A combination of UV-Vis and resonance Raman spectroscopy in conjunction with electrochemistry is employed to reveal the nature of a side procduct formed when using heteroleptic Cu(I)-photosensitizers [(P^P)Cu(N^N)]+...

Pinning and trapped field in MgB2- and MT-YBaCuO bulk superconductors manufactured under pressure

The relevant pinning centers of Abrikosov vortices in MgB2–based materials are oxygen-enriched Mg-B-O inclusions or nanolayers and inclusions of MgBx (x>4) phases. The high critical current densities,...

Landau-Zener-Stückelberg-Majorana lasing in circuit quantum electrodynamics

We demonstrate amplification (and attenuation) of a probe signal by a driven two-level quantum system in the Landau-Zener regime. In the experiment, a superconducting qubit was strongly coupled to a microwave...

Thermally triggered optical tuning of π-conjugated graft copolymers based on reversible Diels-Alder reaction

In order to design a π-conjugated polymer film with tunable optical properties by thermally triggered activation of energy transfer after processing, two monodisperse phenylene ethynylene based oligomers...

Spatially resolved spectroscopic differentiation of hydrophilic and hydrophobic domains on individual insulin amyloid fibrils

The formation of insoluble β-sheet-rich protein structures known as amyloid fibrils is associated with numerous neurodegenerative diseases, such as Alzheimer’s and Parkinson’s disease. A detailed...

Engineering an achromatic Bessel beam using a phase-only spatial light modulator and an iterative Fourier transformation algorithm

Highlights •A novel way of generating a Bessel Beam Profile is proposed.•Beam generation is based on an iterative Fourier transform Algorithm (IFTA) and a spatial light modulator(SLM).•The SLM is...