Abstract. A new precipitation sensor, the Differential Emissivity Imaging Disdrometer (DEID), is used to provide first continuous measurements of mass, diameter, and density individual hydrometeors. The DEID consists an infrared camera pointed at a heated aluminum plate. It exploits contrasting thermal emissivity water metal determine particle mass by assuming that energy conserved during trans...

Radiative properties of spherical heterogeneous particles consisting of threedimensionally ordered macroporous (3DOM) cerium dioxide (ceria) are numerically predicted in the spectral range 0.3–10μm. The particles are 1μm in diameter, with interconnected pores of diameter 330 nm and a face-centered cubic lattice arrangement. Predictions are obtained by solving macroscopic Maxwell’s equations usi...

In order to gain a more comprehensive picture on different mechanisms behind atmospheric particle formation, measurement results from QUEST 2-campaign are analyzed with an aid of an aerosol dynamic model. A special emphasis is laid on air ion and charged aerosol dynamics. Model simulations indicate that kinetic nucleation of ammonia and sulphuric acid together with condensation of sulphuric aci...

Loess grain size data used to infer transport direction or wind strength are generally derived from vigorously disaggregated samples. However, these data may not adequately represent the effective particle size distribution during loess transport, if the transported dust contained aggregates of finegrained material. Thin sections of minimally altered C and BC horizons in the late Pleistocene Pe...

Three fundamental experiments on multi-particle interactions in hard-sphere systems are presented in this thesis. In the first experiment, a mixture of two monodisperse colloids with different particle diameters, but the same particle composition, is studied using diffusing-wave spectroscopy. We find that both the particle structure and the hydrodynamic interactions between large and small ball...

During the summer of 2012, we used laser diffractometry to investigate the temporal and vertical variability of the particle size spectrum (1.25–100 mm in equivalent diameter) in the euphotic zone of the North Pacific Subtropical Gyre. Particles measured with this optical method accounted for;40% of the particulate carbon stocks (<202 mm) in the upper euphotic zone (25–75 m), as estimated using...

A two-dimensional balance model of populations distributed by property was developed using the ordinates of particle diameter andparticle density. This model makes it possible to calculate the spectrums of granulation changing over time in the fluidized bed duringbatch operation and in addition to calculate the time-dependent size distribution of the product granulate for continuous...

A nonuniform electric field exerts a force on a polarizable particle through the Coulomb interaction with the electric dipole induced in the particle, resulting in a motion termed dielectrophoresis. The magnitude of the force depends on the dielectric properties of both the particle and the medium it is suspended in. As a result, measurement of the dielectrophoretic force provides information a...

Exposure to air polluted with particles less than 2.5 micron in size is associated epidemiologically with adverse cardiopulmonary health consequences in humans. The goal of this study was to characterize human pulmonary responses to controlled experimental high-dose exposure to fine and ultrafine magnesium oxide particles. We quantified bronchoalveolar lavage (BAL) cell and cytokine concentrati...

BACKGROUND Reproducible growth of narrow size distributed ε-Co nanoparticles with a specific size requires full understanding and identification of the role of essential synthesis parameters for the applied synthesis method. For the hot injection methodology, a significant discrepancy with respect to obtained sizes and applied reaction conditions is reported. Currently, a systematic investigati...