1 Recent breakthroughs in silicon detector technology now permit measurement of radiated power over a wide range in photon energies. These detectors also known as AXUV photodiodes have a at spectral power response from ultraviolet to X-ray energies, and with a slightly reduced ef-ciency all the way d o wn to visible wavelengths. Since they can be made small, multi-channel detectors allow high s...

Alamethicin is a hydrophobic antibiotic peptide 20 amino acids in length. It is predominantly helical and partitions into lipid bilayers mostly in transmembrane orientations. The rate of the peptide transverse diffusion (flip-flop) in palmitoyl-oleyl-phosphatidylcholine vesicles has been measured recently and the results suggest that it involves an energy barrier, presumably due to the free ene...

We present a model of the galactic habitable zone (GHZ), described in terms of the spatial and temporal dimensions of the Galaxy that may favor the development of complex life. The Milky Way galaxy was modeled using a computational approach by populating stars and their planetary systems on an individual basis by employing Monte Carlo methods. We began with well-established properties of the di...

We develop a simple iterative scheme to include vertical turbulent mixing and diffusion in PRODIMO thermo-chemical models for protoplanetary discs. The are carefully checked convergence towards the time-independent solution of reaction-diffusion equations, as, example, used exoplanet atmosphere models. A series five TTauri disc is presented where we vary parameter α mix from zero 10 −2 take int...

We consider whether the observed periodicity of mass extinctions and comet impacts on Earth is consistent with Solar oscillation about Galactic midplane spiral arm crossings. It further interest to determine a hypothetical thin dark disk necessary give right periodicity, such allowed given kinematic other observational constraints Galaxy’s gravitational potential. show that recent bounds, combi...

Young massive stars warm up the large amount of gas and dust that condenses in their vicinity, exciting a forest lines from different molecular species. Their line brightness is diagnostic tool gas’s physical conditions locally, which we use to set constraints on environment where form. We made Atacama Large Millimeter/submillimeter Array at frequencies near 349 GHz, with an angular resolution ...

Exoplanet atmospheres and protoplanetary disk chemistry are both active fields of research. Chronologically, they represent opposite ends the process planet formation: planets form in disks, composition their should reflect material from. The past decade discoveries insights by ALMA observatory has provided a quantum leap our understanding structures chemical compositions disks. Likewise, groun...