Efficiency and reliability of a repetitive pulse source for continuous pulsed corona processes

Successful introduction of pulsed corona for industrial applications depends very much on the reliability of the high-voltage and pulsed power technology, as well as on the efficiency of energy transfer from the AC-mains to the corona discharge.\u3cbr/\u3eFurthermore adequate electromagnetic compatibility (EMC) should be achieved between high-voltage pulse source and surrounding equipment. A prototype of an industrial high-voltage pulse source which closely meets these demands has been developed

Chronic use of hypnotics and anxiolytics

On request of the Chief-Inspectorate for Mental Health in the Netherlands an overview was made on the research in the Netherlands about the use of psychotropic compounds, viz. hypnotics and anxiolytics, antidepressants and antipsychotics, and even "street drugs". A multidisciplinary studygroup consisting of researchers from various universities and institutes has provided some recent data about the use of hypnotics and anxiolytics. Studies of the University of Utrecht show that chronic use of benzodiazepines may occur in a third of all benzodiazepine users, while about 10% of the total population used benzodiazepines at least once. The percentage of users increases with increasing age, especially above the age of 60. Data of IMS over 1981- 1987 do not show any decrease in the use of these medicines. Comparison of the data with literature indicates that the percentage of users in the Netherlands is very similar to those in other Western countries.GHIG

Chronisch gebruik van Slaap- en Kalmeringsmiddelen

On request of the Chief-Inspectorate for Mental Health in the Netherlands an overview was made on the research in the Netherlands about the use of psychotropic compounds, viz. hypnotics and anxiolytics, antidepressants and antipsychotics, and even "street drugs". A multidisciplinary studygroup consisting of researchers from various universities and institutes has provided some recent data about the use of hypnotics and anxiolytics. Studies of the University of Utrecht show that chronic use of benzodiazepines may occur in a third of all benzodiazepine users, while about 10% of the total population used benzodiazepines at least once. The percentage of users increases with increasing age, especially above the age of 60. Data of IMS over 1981- 1987 do not show any decrease in the use of these medicines. Comparison of the data with literature indicates that the percentage of users in the Netherlands is very similar to those in other Western countries.<br

Quantifying the critical thickness of electron hybridization in spintronics materials

In the rapidly growing field of spintronics, simultaneous control of electronic and magnetic properties is essential, and the perspective of building novel phases is directly linked to the control of tuning parameters, for example, thickness and doping. Looking at the relevant effects in interface-driven spintronics, the reduced symmetry at a surface and interface corresponds to a severe modification of the overlap of electron orbitals, that is, to a change of electron hybridization. Here we report a chemically and magnetically sensitive depth-dependent analysis of two paradigmatic systems, namely La1−xSrxMnO3 and (Ga,Mn)As. Supported by cluster calculations, we find a crossover between surface and bulk in the electron hybridization/correlation and we identify a spectroscopic fingerprint of bulk metallic character and ferromagnetism versus depth. The critical thickness and the gradient of hybridization are measured, setting an intrinsic limit of 3 and 10 unit cells from the surface, respectively, for (Ga,Mn)As and La1−xSrxMnO3, for fully restoring bulk properties

Immunohistochemical demonstration of FC receptors in rat tissues using immune complexes as ligand

To demonstrate the presence and localization of Fc receptors, rat liver cryostat sections were incubated with heterologous and autologous immune complexes (ICx) and immunoglobulin (Ig) aggregates. Binding was demonstrated using the immunoperoxidase technique. Autologous and heterologous ICx as well as aggregates from human and rat Ig appeared to bind to the sinusoidal wall. ICx bind in preference to aggregates. Monomeric Ig and aggregated Ig from swine and rabbit did not bind. The results demonstrated that ICx and rat and human Ig aggregates were bound via an Fc receptor. This Fc receptor was still intact in livers from carbontetra chloride and galactosamine treated rats. The receptor could also be demonstrated on spleen macrophages and on kidney interstitial cells. This method turned out to be an useful functional histochemical method to localize Fc receptors and to demonstrate their affinity and species specificity in tissue