Photothermal signal distribution analysis (PhoSDA).

Photothermal correlation spectroscopy (PhoCS) is a powerful counterpart to fluorescence correlation spectroscopy (FCS). Using PhoCS it is possible to probe the dynamics of non-fluorescent and non-bleaching ultra-stable metal-nanoparticles in solution and biological specimen, where they can be used as tracers and markers. This paper complements the absorption correlation method by a histogram analysis framework, the photothermal signal distribution analysis (PhoSDA).

Hot brownian motion.

We derive the markovian description for the nonequilibrium brownian motion of a heated nanoparticle in a simple solvent with a temperature-dependent viscosity. Our analytical results for the generalized fluctuation-dissipation and Stokes-Einstein relations compare favorably with measurements of laser-heated gold nanoparticles and provide a practical rational basis for emerging photothermal tracer and nanoparticle trapping and tracking techniques.

[Oral desensitization in childhood (author's transl)].

1) There is some evidence that orally administered allergens are absorbed. 2) 75% of the children considered oral desensitization to be effective. 3) As judged by bronchial flow resistance after provocation, oral and subcutaneous desensitization appear to be equally effective in reducing bronchial hypersensitivity.