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New experimental station for gas phase fluorescence spectroscopy

The details of an experimental setup for gas phase atomic and molecular fluorescence measurements using synchrotron radiation are described in this article. The most significant part of the apparatus is an optical arrangement, which allows for simultaneous measurements of dispersed as well as total fluorescence intensity using an effusive gas jet and an inbuilt gas cell assembled in a convenient p

Epstein-Barr virus binding to virus-carrying cell lines is enhanced in the presence of C3 and C3d

The relationship between the receptors for the Epstein-Barr virus (EBV) and the C3d fragment of complement was investigated at the molecular level. In the presence of cell-bound C3, virus binding was enhanced in EBV genome-carrying lines. An identical effect could be elicited by C3d at one-quarter the weight amount; C3b and methylamine-treated C3 had no effect on virus binding. The minimum concent

Dymola and Modelica_EmbeddedSystems in Teaching-Experiences from a Project Course

This contribution presents experiences from a master level project course where a Modelica-based tool, Dymola, supporting embedded control system design has been used. In a recent initiative, the Modelica language has been enhanced to support modeling of embedded systems and code generation targeted at micro processors. Then new specification is sup-ported by, e.g., Dymola and enables wide range o

Natural Radiative Lifetimes of the 5p6s^(1)P_(1) , 5p6s^(3)P_(1,2), and 5p5d^(3)D_(1,2,3) Levels of the Sn I Spectrum by Zero Field Level Crossing Spectroscopy

Natural radiative lifetimes of some excited levels belonging to the 5 p 6 s and 5 p 5 d configurations have been measured by the Hanle method. Some of the levels could be optically excited only from the metastable 3 P 1 and 3 P 2 levels of the 5 p 2 ground configuration. These comparatively low-lying levels were sufficiently populated at the temperature necessary to produce a Sn atomic beam. The f