A. Ullrich

Low‐Voltage Controlled Coercivity in Nanocrystalline Fe‐Ni Films by Magneto‐Ionic Effects

A. Ullrich, Florin Leo Hambeck, Raphael Kohlstedt, Sandra Schiemenz et autres

ABSTRACT Magneto‐ionic control of metal oxide/metal films provides a pathway to voltage‐tunable magnetoelectronic devices with high energy efficiency. So far, magneto‐ionic research mainly focuses on Co‐based films, while Fe‐Ni alloy films, despite their high industrial relevance, have not been studied systematically. In …

de (code pays fourni par la source)

Regenerative effects of human embryonic stem cell‐derived neural crest cells for treatment of peripheral nerve injury

Iwan Jones, Liudmila N. Novikova, Lev N. Novikov, M. Renardy et autres

Surgical intervention is the current gold standard treatment following peripheral nerve injury. However, this approach has limitations, and full recovery of both motor and sensory modalities often remains incomplete. The development of artificial nerve grafts that either complement or replace current surgical …

se, de (code pays fourni par la source)

Trimethylene carbonate-caprolactone conduit with poly-p-dioxanone microfilaments to promote regeneration after spinal cord injury

Liudmila N. Novikova, Mallappa K. Kolar, Paul J. Kingham, A. Ullrich et autres

Spinal cord injury (SCI) is often associated with scarring and cavity formation and therefore bridging strategies are essential to provide a physical substrate for axonal regeneration. In this study we investigated the effects of a biodegradable conduit made from trimethylene carbonate and …

se, de (code pays fourni par la source)

Managing population health to prevent and detect cancer and non-communicable diseases.

Heather Bryant, Shin Hr, David Forman, Stevanovic et autres

The goals of cancer control strategies are generally uniform across all constituencies and are to reduce cancer incidence, reduce cancer mortality, and improve quality of life for those affected by cancer. A well-constructed strategy will ensure that all of its elements can …

ca (code pays fourni par la source)

Physical and biological performance of a novel block copolymer nerve guide

Martin Lietz, A. Ullrich, Caterina Schulte-Eversum, Shayne J. Oberhoffner et autres

Although the ability to regenerate is evident in the nervous system, lesioned neurites are unable to cross gaps in neuronal pathways. In order to bridge gaps, guiding cues are essential to direct neurite regrowth. To overcome many of the shortcomings of polymer-based …

de, pl (code pays fourni par la source)

Hydrate Formation during Pressure Release of Wet CO2,View‐Cell Observations

A. Ullrich, R. Eggers

Abstract The objective of this work is the evaluation of the blocking risk of pipelines by hydrate crystals in processing steps. Two topics were investigated: (I) hydrate formation during pressure release and isochore cooling and (II) the influence of a contact surface …

de (code pays fourni par la source)

Cross‐Linked Polyaryl Blend Membranes for Polymer Electrolyte Fuel Cells

Jochen Kerres, A. Ullrich, M. Hein, Viktor Gogel et autres

Abstract The preparation and characterization of different types of proton‐conducting polymer blend membranes are presented in this paper. The investigations are focused on the determination of the thermal stability of the membranes, because thermal stability is one of the important parameters for …

de (code pays fourni par la source)

In-situ spin trap electron paramagnetic resonance study of fuel cell processes

Alexander Panchenko, Herbert Dilger, Jochen Kerres, M. Hein et autres

A novel method allows the monitoring of radical formation and membrane degradation in-situ in a working fuel cell which is placed in the microwave resonator of an electron paramagnetic resonance (EPR) spectrometer. By introduction of a spin trap molecule at the cathode …

de (code pays fourni par la source)

In-situ EPR spectroscopy a novel method for the investigation and characterisation of the membrane degradation in PMFCs

Alexander Panchenko, Herbert Dilger, Emil Roduner, Jochen Kerres et autres

Synthesis and characterization of polyaryl blend membranes having different composition, different covalent and/or ionical cross-linking density, and their application to DMFC

Jochen Kerres, Wogong Zhang, A. Ullrich, Chuanfu Tang et autres

de (code pays fourni par la source)

Preparation and characterization of novel basic polysulfone polymers

Jochen Kerres, A. Ullrich, M. Hein

Abstract Two synthesis routes for the preparation of novel base‐modified polysulfones (PSUs; Udel®) were investigated: (1) the addition of the basic aromatic ketones 2,2′‐dipyridylketone and 4,4′‐bis‐(diethylamino)benzophenone and the basic aromatic aldehydes N,N‐dimethylamino‐benzaldehyde, pyridine‐2‐aldehyde, pyridine‐3‐aldehyde, and pyridine‐4‐aldehyde to lithiated PSU and (2) the …

de (code pays fourni par la source)

Color as an Indicator of the Organization and Compactibility of Binary Powder Mixes

Jérôme Barra, A. Ullrich, Françoise Falson‐Rieg, Éric Doelker

The aim of this study was to relate the color of several binary mixes to their organization as observed by scanning electronic microscopy, and to their compactibility. Binary mixes of niflumic acid (yellow) with ethyl cellulose, hydroxypropylmethylcellulose, low-substituted hydroxypropylcellulose (L-HPC), and ibuprofen …

ch, fr (code pays fourni par la source)