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389 results on '"Grass, R."'

3. Advanced piezoresistance of extended metal/insulator core shell nanoparticle assemblies

Author

Athanassiou, E. K., Krumeich, F., Grass, R. N., and Stark, W. J.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

Assembled metal/insulator nanoparticles with a core/shell geometry provide access to materials containing a large number (>106) of tunneling barriers. We demonstrate the production of ceramic coated metal nanoparticles exhibiting an exceptional pressure sensitive conductivity. We further show that graphene bi- and trilayers on 20 nm copper nanoparticles are insulating in such core/shell geometry and show a similar pressure dependent conductivity. This demonstrates that core/shell metal/insulator assemblies offer a route to alternative sensing materials., Comment: 14 pages, 3 figures, published in Physical Review Letters

Published
2010
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7. Sprunggelenkfrakturen

Author

Rammelt, S., Grass, R., and Zwipp, H.

Abstract

Zusammenfassung: Sprunggelenkfrakturen gehören zu den häufigsten Verletzungen am menschlichen Skelett. Für eine korrekte Indikationsstellung zur optimalen Versorgung sind die Kenntnis des prinzipiellen Verletzungsmechanismus und die Analyse der verletzten knöchernen und ligamentären Komponenten erforderlich. Nicht dislozierte, isolierte Innen- oder Außenknöchelfrakturen können mit gutem Langzeitergebnis konservativ-funktionell behandelt werden, wenn eine Instabilität der Knöchelgabel sicher ausgeschlossen wurde. Luxationsfrakturen müssen zur Verhinderung schwerer Weichteilkomplikationen notfallmäßig unter ausreichender Analgesie reponiert werden. Der entscheidende Prognosefaktor bei der operativen Behandlung dislozierter Sprunggelenkfrakturen ist die exakte anatomische Reposition der Knöchelgabel und insbesondere beim Vorliegen mechanisch relevanter Syndesmosenverletzungen die korrekte Stellung der distalen Fibula in der Tibia-Inzisur. Negative Prognosefaktoren sind neben der ungenügenden Reposition die verspätete Versorgung, eine Verletzung mehrerer Sprunggelenkkomponenten und das Vorliegen einer hereditären oder erworbenen Neuropathie.

Published
2024
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9. Emerging Approaches to DNA Data Storage: Challenges and Prospects

Author

Doricchi A., Platnich C. M., Gimpel A., Horn F., Earle M., Lanzavecchia G., Cortajaren A. L., Liz-Marzan L., Liu N., Heckel R., Grass R. N., Krahne R., Keyser U., and Garoli D.

Abstract

With the total amount of worldwide data skyrocketing, the global data storage demand is predicted to grow to 1.75 × 1014 GB by 2025. Traditional storage methods have difficulties keeping pace given that current storage media have a maximum density of 103 GB/mm3. As such, data production will far exceed the capacity of currently available storage methods. The costs of maintaining and transferring data, as well as the limited lifespans and significant data losses associated with current technologies also demand advanced solutions for information storage. Nature offers a powerful alternative through the storage of information that defines living organisms in unique orders of four bases (A, T, C, G) located in molecules called deoxyribonucleic acid (DNA). DNA molecules as information carriers have many advantages over traditional storage media. Their high storage density, potentially low maintenance cost, ease of synthesis, and chemical modification make them an ideal alternative for information storage. To this end, rapid progress has been made over the past decade by exploiting user-defined DNA materials to encode information. In this review, we discuss the most recent advances of DNA-based data storage with a major focus on the challenges that remain in this promising field, including the current intrinsic low speed in data writing and reading and the high cost per byte stored. Alternatively, data storage relying on DNA nanostructures (as opposed to DNA sequence) as well as on other combinations of nanomaterials and biomolecules are proposed with promising technological and economic advantages. In summarizing the advances that have been made and underlining the challenges that remain, we provide a roadmap for the ongoing research in this rapidly growing field, which will enable the development of technological solutions to the global demand for superior storage methodologies.

Published
2022

30. Pilotbericht zum Monitoring der deutschen Bioökonomie

Author

Bringezu, S., Banse, M., Ahmann, L., Bezama, Alberto, Billig, Eric, Bischof, R., Blanke, C., Brosowski, A., Brüning, S., Borchers, Malgorzata, Budzinski, Maik, Cyffka, K.-F., Distelkamp, M., Egenolf, V., Flaute, M., Geng, N., Gieseking, L., Graß, R., Hennenberg, K., Hering, T., Iost, S., Jochem, D., Krause, T., Lutz, C., Machmüller, A., Mahro, B., Majer, S., Mantau, U., Meisel, K., Moesenfechtel, Urs, Noke, A., Raussen, T., Richter, F., Schaldach, R., Schweinle, J., Thrän, Daniela, Uglik, M., Weimar, H., Wimmer, F., Wydra, S., Zeug, Walther, Bringezu, S., Banse, M., Ahmann, L., Bezama, Alberto, Billig, Eric, Bischof, R., Blanke, C., Brosowski, A., Brüning, S., Borchers, Malgorzata, Budzinski, Maik, Cyffka, K.-F., Distelkamp, M., Egenolf, V., Flaute, M., Geng, N., Gieseking, L., Graß, R., Hennenberg, K., Hering, T., Iost, S., Jochem, D., Krause, T., Lutz, C., Machmüller, A., Mahro, B., Majer, S., Mantau, U., Meisel, K., Moesenfechtel, Urs, Noke, A., Raussen, T., Richter, F., Schaldach, R., Schweinle, J., Thrän, Daniela, Uglik, M., Weimar, H., Wimmer, F., Wydra, S., and Zeug, Walther

Abstract

Der Pilotbericht gibt einen ersten Überblick über wesentliche Merkmale und Trends der deutschen „biobasierten Ökonomie“ im nationalen und internationalen Kontext. Er wurde im Rahmen des SYMOBIO-Projekts koordiniert vom CESR der Universität Kassel in Kooperation mit dem Thünen-Institut.

Published
2020

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