Interpolation of Classical Lorentz Spaces1

We describe the K-functional and identify the real interpolated spaces of general quasi–Banach couples of classical Lorentz spaces. Applications are given which include interpolation of spaces of Lorentz–Zygmund type.     

The Synthesis and Crystal Structure of Hg3TeI4

The structure of cubic Hg₃TeI₄ was determined from powder data. The four positions of the cubic closestpacking of the anions are statistically occupied by 0.8 Te-atoms and 3.2 I-atoms. The two types of tetrahedral holes are occupied to the extent of 2/4 and 0.4/4, respectively, by Hg-atoms. With an ordered model of lower symmetry, the stoichiometric composition can be explained and a homogeneous charge distribution can be achieved. The ordered model contains regions of the structure of red HgI₂, which are connected by fragments of the SiS₂-type.     

Seltene Erden

Ohne Zusammenfassung     

Zur Entstehung von Oberflächenladungen im Zusammenhang mit Ionentransport- und Sekundärelektronenemissionserscheinungen

Surface charges at the glassy or metallized but isolated inner walls of differently sized diodes are investigated as dependent upon different conditions (vacuum, inner geometry, electric operational conditions). For this purpose, a special condenser discharge method is used which gives the opportunity to study under well known conditions the temporal behaviour of those surface charges caused by electrical fields from outside the tube changing with time. One gets informations concerning the transport of positive ions and of electrons within such tubes in respect to the different kinds of wall material. The conditions are given for origin and maintenance of a stable positive wall potential above 150 V. In this case, the ratio of the electron current from the cathode to the wall and to the anode respectively comes out as ascending from 0.3 to 0.7 for a variation of the anode current from 200 to 900 μA, as one finds by comparing observations of a desorption effect stimulated by the electron current to the wall.     

High-performance liquid chromatography of lactose with evaporative light scattering detection, applied to determine fine particle dose of carrier in dry powder inhalation products

A method for quantification of the fine particle dose of lactose is described, using a hydrophilic interaction chromatography (HILIC) method and evaporative light scattering detection. The HILIC method used an aminopropyl column and a mobile phase consisting of acetonitril/water (80/20, v/v) for isocratic elution. Sensitive chromatography was obtained using a low concentration of water in the extraction solvent. The detection limit (RSD<10%) at an injection volume of 10 microL is 10 microg/mL. Linearity was obtained in the range of 10-80 microg/mL (R(2)>0.99). A relative standard deviation (RSD) of 0.5% (N=6) demonstrated good precision of the optimized method.