SURFACE-ELECTROMYOGRAPHY: SKIN AND SUBCUTANEOUS FAT TISSUE ATTENUATE AMPLITUDE AND FREQUENCY PARAMETERS

The purpose of this study was to identify the attenuating influence on surface-EMG amplitude (IEMG) and mean power frequency (MPF) by skin and subcutaneous fat tissue. The electrode-muscle-distance (ΔEM) of the left m. biceps brachii is determined by tissue thickness. This was established by ultrasound in 12 females and 15 males six times each during a 43-week period (n=162). IEMG and MPF were measured during isometric maximum voluntary contractions (MVC). ΔEM explained up to 31 % of the variance of EMG-amplitude during MVC, which corresponds to previous studies on submaximum and maximum contractions. MPF variation was explained by ΔEM with up to 16 % and requires further validation. These results are important for the assessment of long-term training studies and neuromuscular fatigue measurements

Suomen ja saksan keskustelukielioppia

Kirja-arvioMuikku-Werner, Pirkko: Impositiivisuus ja kielellinen variaatio - julkisten keskustelujen käskyt ja kysymykset kielenopetuksen näkökulmast

Le collège doctoral franco-allemand « Construire les différences – Unterschiede denken »

Le collège doctoral franco-allemand « Construire les différences – Unterschiede denken », financé par l’Université franco-allemande et mis en place en 2006, achèvera la deuxième phase de son existence en 2012. De 2006 à 2009, le thème central en a été « La dynamique des représentations dans la formation de la modernité européenne – Die Dynamik der Repräsentationen in der Formierung der europäischen Moderne » – et de 2009 à 2012 « Construire les différences – Unterschiede denken ». Le collège ..

Fibre optic sensing system for monitoring of current collectors and overhead contact lines of railways

Fibre optic sensors are excellent tools to use for monitoring high-voltage current collectors. Because of their small cross section and electrical neutrality, they are easily integrated into the current collector strip and are well specialized for detection of high-speed load events. The conventional contact force measurement with four force sensors below the collector strips can also be simplified by using fibre optic force and acceleration sensors

Ion microscopy with evolutionary-algorithm-based autofocusing

Ion microscopy is an established technique for laser focus diagnostics and the accurate, intensity-resolved measurement of laser ionization processes. In the present feasibility study, we discuss a new ion microscope design, which improves its resolution across a large range of magnifications and simplifies its operation. Instead of the common two einzel lens configuration, which is usually optimized for a fixed magnification, we propose a generic design consisting of an array of equally spaced ring electrodes, whose individually adjustable voltages are controlled by an evolutionary algorithm. In this way, we can realize aberration minimized magnifications between 25 and 100. Moreover, the algorithm can adjust the voltage settings under changing experimental conditions and facilitates autofocusing for user-defined magnification

A flavin-dependent halogenase from metagenomic analysis prefers bromination over chlorination

Neubauer P, Widmann C, Wibberg D, et al. A flavin-dependent halogenase from metagenomic analysis prefers bromination over chlorination. PLoS ONE. 2018;13(5): e0196797.Flavin-dependent halogenases catalyse halogenation of aromatic compounds. In most cases, this reaction proceeds with high regioselectivity and requires only the presence of FADH2, oxygen, and halide salts. Since marine habitats contain high concentrations of halides, organisms populating the oceans might be valuable sources of yet undiscovered halogenases. A new Hidden-Markov-Model (HMM) based on the PFAM tryptophan halogenase model was used for the analysis of marine metagenomes. Eleven metagenomes were screened leading to the identification of 254 complete or partial putative flavin-dependent halogenase genes. One predicted halogenase gene (brvH) was selected, codon optimised for E. coli, and overexpressed. Substrate screening revealed that this enzyme represents an active flavin-dependent halogenase able to convert indole to 3-bromoindole. Remarkably, bromination prevails also in a large excess of chloride. The BrvH crystal structure is very similar to that of tryptophan halogenases but reveals a substrate binding site that is open to the solvent instead of being covered by a loop

Hydrometeorological and gravity signals at the Argentine-German Geodetic Observatory (AGGO) in la Plata

The Argentine-German Geodetic Observatory (AGGO) is one of the very few sites in the Southern Hemisphere equipped with comprehensive cutting-edge geodetic instrumentation. The employed observation techniques are used for a wide range of geophysical applications. The data set provides gravity time series and selected gravity models together with the hydrometeorological monitoring data of the observatory. These parameters are of great interest to the scientific community, e.g. for achieving accurate realization of terrestrial and celestial reference frames. Moreover, the availability of the hydrometeorological products is beneficial to inhabitants of the region as they allow for monitoring of environmental changes and natural hazards including extreme events. The hydrological data set is composed of time series of groundwater level, modelled and observed soil moisture content, soil temperature, and physical soil properties and aquifer properties. The meteorological time series include air temperature, humidity, pressure, wind speed, solar radiation, precipitation, and derived reference evapotranspiration. These data products are extended by gravity models of hydrological, oceanic, La Plata estuary, and atmospheric effects. The quality of the provided meteorological time series is tested via comparison to the two closest WMO (World Meteorological Organization) sites where data are available only in an inferior temporal resolution. The hydrological series are validated by comparing the respective forward-modelled gravity effects to independent gravity observations reduced up to a signal corresponding to local water storage variation. Most of the time series cover the time span between April 2016 and November 2018 with either no or only few missing data points.Fil: Mikolaj, Michal. German Research Centre for Geosciences; AlemaniaFil: Güntner, Andreas. German Research Centre for Geosciences; Alemania. Universitat Potsdam; AlemaniaFil: Brunini, Claudio Antonio. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - la Plata. Laboratorio Geo - Aggo.; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Wziontek, Hartmut. Federal Agency for Cartography and Geodesy; AlemaniaFil: Gende, Mauricio Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Schröder, Stephan. German Research Centre for Geosciences; AlemaniaFil: Cassino, Augusto Martin. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - la Plata. Laboratorio Geo - Aggo.; ArgentinaFil: Pasquaré, Alfredo Oscar. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - la Plata. Laboratorio Geo - Aggo. Observatorio Geodesico Argentino Aleman.; ArgentinaFil: Reich, Marvin. German Research Centre for Geosciences; AlemaniaFil: Hartmann, Anne. German Research Centre for Geosciences; AlemaniaFil: Oreiro, Fernando Ariel. Universidad de Buenos Aires. Facultad de Ingeniería; Argentina. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; ArgentinaFil: Pendiuk, Jonathan. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Guarracino, Luis. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; ArgentinaFil: Antokoletz, Ezequiel Darío. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas; Argentin