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101.
102.
Sandrine Quignard Guillermo J. Copello Carole Aimé Isabelle Bataille Christophe Hélary Martin F. Desimone Thibaud Coradin 《Advanced Engineering Materials》2012,14(3):B51-B55
A buffer‐mediated gelation route for collagen hydrogels that allows the formation of homogeneous composite and hybrid materials with various silica sources (i.e., colloidal silica and soluble silicates) at high concentration (up to 25 × 10?3 M ) is described. Most significant improvement in rheological properties and proliferation of primary adult human dermal fibroblasts was obtained for the silicate‐based hybrid materials. A similar trend was observed in composite materials incorporating 14 nm SiO2 nanoparticles, although to a much lesser extent, whereas larger colloids (80 and 390 nm) did not significantly impact mechanical stability and cell behavior. Modification of 80 nm particles surface with amine groups weakens the collagen‐mineral interface, resulting in the decrease of material stability and leading to particle aggregation during the course of cell proliferation experiments. 相似文献
103.
INTRODUCTIONMultibladerowcalculationscanbeperformedusingsteady3DNScodesprovidedthatassumptionsaremadeforthecouplingofbladerows.Thesocalledmixing--planeapproachneedsthetangentialaveragesofflowquantitiesattheinterfaceplanebetweenadjacentbladerows.Butth... 相似文献
104.
Ming Liu Sandrine Zanna Isabelle Frateur Guangling Song Philippe Marcus 《Corrosion Science》2009,51(5):1115-191
An XPS investigation was carried out of the surface films, formed by exposure to ultrapure water, on mechanically ground Mg and the two Mg-Al intermetallic compounds: Al3Mg2 and Mg17Al12. The mechanically ground Mg surface had a film of MgO at the Mg metal surface covered by a Mg(OH)2 layer, formed by the reaction of the MgO with water vapour in the air. Upon immersion in ultrapure water, this film converted to a duplex film with an inner MgO layer next to the Mg metal and an external porous hydroxide layer. For both intermetallics, the XPS data is consistent with (i) preferential dissolution of Mg and (ii) a 10 nm thick film on the surface after immersion in ultrapure water; the film composition on Al3Mg2 was AlMg1.4O0.2(OH)5.4 whilst on Mg17Al12 the composition was AlMg2.5(OH)8. 相似文献
105.
106.
Ki Yeol Byun Isabelle FerainJohn Hayes Ran Yu Farzan Gity Cindy Colinge 《Microelectronic Engineering》2011,88(4):522-525
In this work, an alternative method for producing the single crystalline Ge-Si Avalanche photodiodes (APD) with low thermal budget was investigated. Structural and electrical investigations show that low temperature Ge to Si wafer bonding can be used to achieve successful APD integration. Based on the surface chemistry of the Ge layer, the buried interfaces were investigated using high resolution transmission electron microscopy as a function of surface activation after low temperature annealing at 200 and 300 °C. The hetero-interface was characterized by measuring forward and reverse currents. 相似文献
107.
Cécile Bize Muriel Blanzat Isabelle Rico-Lattes 《Journal of surfactants and detergents》2010,13(4):465-473
Like other amphiphilic compounds, bolaforms do not always possess surfactant properties; it depends on the spacer chain length
and the nature of the polar head group (both sufficiently hydrophobic or hydrophilic, respectively, to intensify the amphiphilic
properties). In this regard, unsymmetrical bolaamphiphiles bearing a sugar polar head group and a carboxylic acid function
at the opposite ends of a hydrophobic binding spacer were synthesized. These biocompatible sugar-derived bolaforms were associated
with basic fatty amines, by an acid–base reaction, to obtain catanionic mixtures. Associations with 1,7-lactobionamidoheptanoic
acid and decylamine or octylamine spontaneously form stable 200–600 nm vesicles. This new type of association may find an
application in drug delivery since catanionic vesicles can transport active substances inside the hydrophilic core, as well
as hydrophobic drugs within the bilayer. 相似文献
108.
Ghinwa M. Naja René Alary Philippe Bajeat Gaël Bellenfant Jean-Jacques Godon Jean-Philippe Jaeg Gérard Keck Armand Lattes Carole Leroux Hugues Modelon Marina Moletta-Denat Olivier Ramalho Christophe Rousselle Sandrine Wenisch Isabelle Zdanevitch 《Renewable Energy》2011,36(12):3445-3451
Biogas produced from anaerobic fermentation of organic substances represents an alternative renewable energy source. Its utilization would contribute to substantial reduction of the solid waste volume in land-filling and incineration. Biogas so produced could be utilized on site or it could be injected into the natural gas distribution network. Microbiological and chemical compositions of different biogas types were determined in order to conduct qualitative and quantitative risk assessments of the potential health hazards associated with biogas use for cooking. Biogas types that could be allowed for injection in the natural gas pipelines were listed with recommendations, while outlining the European biogas injection policy. Results indicated that the injection of the processed biogas in the distribution network did not present any additional chemical or microbiological risk to consumers when compared to natural gas, provided that the biogas resulted from the fermentation of non-dangerous waste. However, since this study did not examine the microbiological and chemical composition of biogas originating from wastewater sludges and/or industrial wastes, the injection of this type of biogas into the gas distribution network should not be allowed unless a similar risk evaluation study is conducted for each case. 相似文献
109.
Jean Berstel Luc Boasson Olivier Carton Isabelle Fagnot 《Theory of Computing Systems》2010,46(3):443-478
We consider Sturmian trees as a natural generalization of Sturmian words. A Sturmian tree is a tree having n+1 distinct subtrees of height n for each n. As for the case of words, Sturmian trees are irrational trees of minimal complexity. 相似文献
110.
Benoît Flahaut Michel Mouchart Ernesto San Martin Isabelle Thomas 《Accident; analysis and prevention》2003,35(6):2186-1004
This article aims to determine the location and the length of road sections characterized by a concentration of accidents (black zones). Two methods are compared: one based on a local decomposition of a global autocorrelation index, the other on kernel estimation. After explanation, both methods are applied and compared in terms of operational results, respective advantages and shortcomings, as well as underlying conceptual elements. The operationality of both methods is illustrated by an application to one Belgian road. 相似文献