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Auflistung nach Schlagwort "Degradation"

Anzeige der Dokumente 1-18 von 18

Biodegradation of a magnesium alloy implant in the intercondylar femoral notch showed an appropriate response to the synovial membrane in a rabbit model in vivo

Ezechieli, Marco; Diekmann, Julia; Weizbauer, Andreas; Becher, Christoph; Willbold, Elmar; Helmecke, Patrick; Lucas, Arne; Schavan, Robert; Windhagen, Henning (London : SAGE Publications Ltd., 2014)

Degradable magnesium alloys are promising biomaterials for orthopedic applications. The aim of this study was to evaluate the potential effects on both the synovial membrane (synovialis) and the synovial fluid (synovia) ...
Carrier lifetime instabilities in the bulk and at the surfaces of crystalline silicon solar cells triggered by fast-firing processes

Winter, Michael (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2024)

Carrier lifetime instabilities in crystalline silicon solar cells under illumination affect the long-term stability of photovoltaic modules in view of the steadily increasing conversion efficiency of the solar cells used ...
Comparative in vitro study and biomechanical testing of two different magnesium alloys

Weizbauer, Andreas; Modrejewski, Christian; Behrens, Sabine; Klein, Helmut; Helmecke, Patrick; Seitz, Jan-Marten; Windhagen, Henning; Möhwald, Kai; Reifenrath, Janin; Waizy, Hazibullah (London : SAGE Publications Ltd., 2014)

In this in vitro study, magnesium plates of ZEK100 and MgCa0.8 alloy similar to common titanium alloy osteosynthesis plates were investigated as degradable biomedical materials with a focus on primary stability. Immersion ...
Complex formation between UO22+ and α-isosaccharinic acid: insights on a molecular level

Brinkmann, Hannes; Patzschke, Michael; Kaden, Peter; Raiwa, Manuel; Rossberg, André; Kloditz, Roger; Heim, Karsten; Moll, Henry; Stumpf, Thorsten (London : Royal Society of Chemistry, 2019)

Cellulosic materials present as tissue, paper, wood, or filter materials in low and intermediate level waste will degrade under alkaline conditions if water ingresses in a cementitious backfilled repository. The main ...
Dynamische In-Vitro-Studie zur Strömungsabhängigkeit der Degradationsrate von Magnesium

Quirico, M.; Evertz, F.; Glasmacher, Birgit (Berlin : Walter de Gruyter, 2013-09-07)

Zur Schaffung eines standardisierten Versuchsablaufs für Studien zur Magnesiumdegradation im Rahmen der Entwicklung eines biodegradablen Implantatwerkstoffs, wurde eine Steuerung für einen Prüfstand zur dynamischen ...
Effect of H2O and O2 on the adsorption and degradation of acetaldehyde on anatase surfaces - An in situ ATR-FTIR study

Melchers, Stephanie; Schneider, Jenny; Emeline, Alexei V.; Bahnemann, Detlef W. (Basel : MDPI AG, 2018)

The effect of H2O and O2 on the adsorption and degradation of gaseous acetaldehyde on the anatase TiO2 surface has been studied, in the dark and upon UV illumination, at ambient temperatures. The processes occurring at the ...
Experimentell-theoretische Untersuchungen zur Optimierung eines SOFC-Systems mit Anodengasrezirkulation

Fischer, Marlene Johanna (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2022)

In Zeiten zunehmender Rohstoffknappheit und fortschreitendem Klimawandel zeigt sich ein starker Trend im mobilen Sektor hinsichtlich Alternativen in der Energiebereitstellung. [14, 52] Die Solid-Oxide-Fuel-Cell (SOFC)-Technologie ...
In vivo assessment of the host reactions to the biodegradation of the two novel magnesium alloys ZEK100 and AX30 in an animal model

Huehnerschulte, Tim Andreas; Reifenrath, Janin; Rechenberg, Brigitte von; Dziuba, Dina; Seitz, Jan-Marten; Bormann, Dirk; Windhagen, Henning; Meyer-Lindenberg, Andrea (London : BioMed Central Ltd, 2012)

Background: Most studies on biodegradable magnesium implants published recently use magnesium-calcium-alloys or magnesium-aluminum-rare earth-alloys. However, since rare earths are a mixture of elements and their toxicity ...
In vivo degradation behavior of the magnesium alloy land442 in rabbit tibiae

Ullmann, Berit; Reifenrath, Janin; Dziuba, Dina; Seitz, Jan-Marten; Bormann, Dirk; Meyer-Lindenberg, Andrea (Basel : MDPI AG, 2011)

In former studies the magnesium alloy LAE442 showed promising in vivo degradation behavior and biocompatibility. However, reproducibility might be enhanced by replacement of the rare earth composition metal "E" by only a ...
Lifetime degradation mechanism in boron-doped Czochralski silicon

Voronkov, Vladimir V.; Falster, Robert; Batunina, A.V.; MacDonald, D.; Bothe, Karsten; Schmidt, J. (London : Elsevier Ltd., 2011)

The recombination centre that emerges in boron- and oxygen-containing silicon was thought to be a complex of a substitutional boron atom Bs and an oxygen dimer O2. However in material co-doped with boron and phosphorus, ...
Magnesium Alloys for Open-Pored Bioresorbable Implants

Maier, Hans Jürgen; Julmi, Stefan; Behrens, Sabine; Klose, Christian; Gartzke, Ann-Kathrin; Wriggers, Peter; Waselau, Anja-Christina; Meyer-Lindenberg, Andrea (New York, NY : Springer Science + Business Media, 2020)

If bone defects occur, the body’s own healing mechanism can close them below a critical size; for larger defects, bone autografts are used. These are typically cut from the same person’s hip in a second surgery. Consequently, ...
Mode of action of brown rot decay resistance in modified wood: A review

Ringman, Rebecka; Pilgard, Annica; Brischke, Christian; Richter, Klaus (Berlin : De Gruyter, 2014)

Chemically or physically modified wood materials have enhanced resistance to wood decay fungi. In contrast to treatments with traditional wood preservatives, where the resistance is caused mainly by the toxicity of the ...
Nanoporöse Organosilica-Materialien für biomedizinische Anwendungen

Jahns, Mandy (Hannover : Institutionelles Repositorium der Leibniz Universität Hannover, 2019)

Bei vielen biomedizinischen Problemen in einer immer älter werdenden Gesellschaft können Biomaterialien einen wichtigen Beitrag dazu leisten, nicht mehr (voll) funktionsfähige Bestandteile des Körpers zu unterstützen oder ...
Past, present, and future geo-biosphere interactions on the Tibetan Plateau and implications for permafrost

Ehlers, Todd A.; Chen, Deliang; Appel, Erwin; Bolch, Tobias; Chen, Fahu; Diekmann, Bernhard; Dippold, Michaela A.; Giese, Markus; Guggenberger, Georg; Lai, Hui-Wen; Li, Xin; Liu, Junguo; Liu, Yongqin; Ma, Yaoming; Miehe, Georg; Mosbrugger, Volker; Mulch, Andreas; Piao, Shilong; Schwalb, Antje; Thompson, Lonnie G.; Su, Zhongbo; Sun, Hang; Yao, Tandong; Yang, Xiaoxin; Yang, Kun; Zhu, Liping (Amsterdam [u.a.] : Elsevier, 2022)

Interactions between the atmosphere, biosphere, cryosphere, hydrosphere, and geosphere are most active in the critical zone, a region extending from the tops of trees to the top of unweathered bedrock. Changes in one or ...
Photocatalytic degradation of the herbicide imazapyr: Do the initial degradation rates correlate with the adsorption kinetics and isotherms?

Atitar, M. Faycal; Bouziani, Asmae; Dillert, Ralf; El Azzouzi, Mohamed; Bahnemann, Detlef W. (Cambridge : Royal Society of Chemistry, 2018)

The objective of this work is to correlate the photocatalytic degradation of the herbicide imazapyr in aqueous suspensions of the commercially available Evonik Aeroxide TiO2 P25 with the dark adsorption phenomena considering ...
A structural design concept for a multi-shell blended wing body with laminar flow control

Bishara, Majeed; Horst, Peter; Madhusoodanan, Hinesh; Brod, Martin; Daum, Benedikt; Rolfes, Raimund (Basel : MDPI AG, 2018)

Static and fatigue analyses are presented for a new blended wing body (BWB) fuselage concept considering laminar flow control (LFC) by boundary layer suction in order to reduce the aerodynamic drag. BWB aircraft design ...
Temperature and Performance Inhomogeneities in PEM Electrolysis Stacks with Industrial Scale Cells

Krenz, T.; Weiland, O.; Trinke, P.; Helmers, L.; Eckert, C.; Bensmann, B.; Hanke-Rauschenbach, R. (Bristol : IOP Publishing, 2023)

In this work temperature inhomogeneities and their influence on PEMWE performance of industrial-scale stacks are investigated. Three temperature differences are examined: (i) between the inlet and outlet, (ii) in-between ...
Two-stage permanent deactivation of the boron-oxygen-related recombination center in crystalline silicon

Steckenreiter, V.; Walter, D.C.; Schmidt, J. (London : Elsevier Ltd., 2017)

We analyze the lifetime evolution during permanent deactivation of the boron-oxygen-related defect center (BO defect) in boron-doped, oxygen-rich Czochralski-grown silicon (Cz-Si). In particular, we examine the impact of ...

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Auflistung nach Schlagwort "Degradation"

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