Gaseous naphthalene has been removed by air plasma generated by pulsed corona discharges at 100°C(LSPM)and dielectric barrier discharges(DBD)up to 250℃(LPGP)in different reactors geometries.Naphthalene has been ...Gaseous naphthalene has been removed by air plasma generated by pulsed corona discharges at 100°C(LSPM)and dielectric barrier discharges(DBD)up to 250℃(LPGP)in different reactors geometries.Naphthalene has been chosen as one of unbumed hydrocarbon present in exhaust gas engine during the cold start of vehicles.The comparison between the different discharge geometries has been possible using the specific input energy(SIE)as relevant parameter for pollutant removal process control considering the differences in the electrical characteristics and the differences of gas flow.The best naphthalene degradation is obtained in the wire-to cylinder(WTC)corona discharge and the stem-to-cylinder DBD with an energy costβrespectively of 10 and 20 J L^-1.The main by-products issues of the naphthalene oxidation are CO2 and CO reaching 45%in Multi-Pin-to-Plan corona discharge.We detected polyaromatic hydrocarbons in the gas phase(few ppm)and in the solid phase deposited in the reactors.The introduction of water in the discharges promotes the naphthalene degradation by OH-atom,which has better oxidising power than O-atom in dry air.展开更多
Substrate-based crawling motility of eukaryotic cells is essential for many biological functions,both in developing and mature organisms.Motility dysfunctions are involved in several life-threatening pathologies such ...Substrate-based crawling motility of eukaryotic cells is essential for many biological functions,both in developing and mature organisms.Motility dysfunctions are involved in several life-threatening pathologies such as cancer and metastasis.Motile cells are also a natural realisation of active,self-propelled‘particles’,a popular research topic in nonequilibrium physics.Finally,from the materials perspective,assemblies of motile cells and evolving tissues constitute a class of adaptive self-healing materials that respond to the topography,elasticity and surface chemistry of the environment and react to external stimuli.Although a comprehensive understanding of substrate-based cell motility remains elusive,progress has been achieved recently in its modelling on the whole-cell level.Here we survey the most recent advances in computational approaches to cell movement and demonstrate how these models improve our understanding of complex self-organised systems such as living cells.展开更多
The optical properties of germanium can be tailored by combining strain engineering and n-type doping.In this paper,we review the recent progress that has been reported in the study of germanium light emitters for sil...The optical properties of germanium can be tailored by combining strain engineering and n-type doping.In this paper,we review the recent progress that has been reported in the study of germanium light emitters for silicon photonics.We discuss the different approaches that were implemented for strain engineering and the issues associated with n-type doping.We show that compact germanium emitters can be obtained by processing germanium into tensile-strained microdisks.展开更多
An ordered nanostructure formed by epitaxial crystallization of a semicrystalline block copolymer on a substrate has been used as a patterned template for the selective deposition of thermally evaporated gold nanopart...An ordered nanostructure formed by epitaxial crystallization of a semicrystalline block copolymer on a substrate has been used as a patterned template for the selective deposition of thermally evaporated gold nanoparticles, resulting in the formation of structure-guiding host nanocomposites in which the ordered distribution of the guest particles is guided by the ordering of the host nanostructured block copolymer matrix. This opens new perspectives in the field of polymeric composites related to the maximum enhancement of effective physical properties and to the numerous possible applications that arise due to the presence of long-range order in the spatial distribution of functional nanoparticles.展开更多
Fibroblast growth factor-2 (FGF-2) is a member of a large family of proteins that bind heparin and heparan sulfate and modulate the function of a wide range of cell types. It has been proved that FGF-2 stimulates the ...Fibroblast growth factor-2 (FGF-2) is a member of a large family of proteins that bind heparin and heparan sulfate and modulate the function of a wide range of cell types. It has been proved that FGF-2 stimulates the growth and development of new blood vessels (angiogenesis) that contribute to the pathogenesis of several diseases (i.e. cancer, atherosclerosis). However, many of the biological activities of FGF-2 have been found to depend on its receptor抯 intrinsic tyrosine kinase activity and second messengers such as the mitogen activated protein kinases. This review will focus on the mechanism of FGF-2/FGFR induced signaling pathway in tumor and human breast cancer.展开更多
基金supported in part by a Peugeot SociétéAnonyme contract
文摘Gaseous naphthalene has been removed by air plasma generated by pulsed corona discharges at 100°C(LSPM)and dielectric barrier discharges(DBD)up to 250℃(LPGP)in different reactors geometries.Naphthalene has been chosen as one of unbumed hydrocarbon present in exhaust gas engine during the cold start of vehicles.The comparison between the different discharge geometries has been possible using the specific input energy(SIE)as relevant parameter for pollutant removal process control considering the differences in the electrical characteristics and the differences of gas flow.The best naphthalene degradation is obtained in the wire-to cylinder(WTC)corona discharge and the stem-to-cylinder DBD with an energy costβrespectively of 10 and 20 J L^-1.The main by-products issues of the naphthalene oxidation are CO2 and CO reaching 45%in Multi-Pin-to-Plan corona discharge.We detected polyaromatic hydrocarbons in the gas phase(few ppm)and in the solid phase deposited in the reactors.The introduction of water in the discharges promotes the naphthalene degradation by OH-atom,which has better oxidising power than O-atom in dry air.
基金the German Science Foundation(DFG)via project ZI 1232/2-1supported by the US Department of Energy(DOE),Office of Science,Basic Energy Sciences(BES),Materials Science and Engineering Division。
文摘Substrate-based crawling motility of eukaryotic cells is essential for many biological functions,both in developing and mature organisms.Motility dysfunctions are involved in several life-threatening pathologies such as cancer and metastasis.Motile cells are also a natural realisation of active,self-propelled‘particles’,a popular research topic in nonequilibrium physics.Finally,from the materials perspective,assemblies of motile cells and evolving tissues constitute a class of adaptive self-healing materials that respond to the topography,elasticity and surface chemistry of the environment and react to external stimuli.Although a comprehensive understanding of substrate-based cell motility remains elusive,progress has been achieved recently in its modelling on the whole-cell level.Here we survey the most recent advances in computational approaches to cell movement and demonstrate how these models improve our understanding of complex self-organised systems such as living cells.
基金“Triangle de la Physique”under the Gerlas convention and by Agence Nationale de la Recherche under the GRAAL convention(ANR Blanc call 2011 BS0300401)。
文摘The optical properties of germanium can be tailored by combining strain engineering and n-type doping.In this paper,we review the recent progress that has been reported in the study of germanium light emitters for silicon photonics.We discuss the different approaches that were implemented for strain engineering and the issues associated with n-type doping.We show that compact germanium emitters can be obtained by processing germanium into tensile-strained microdisks.
文摘An ordered nanostructure formed by epitaxial crystallization of a semicrystalline block copolymer on a substrate has been used as a patterned template for the selective deposition of thermally evaporated gold nanoparticles, resulting in the formation of structure-guiding host nanocomposites in which the ordered distribution of the guest particles is guided by the ordering of the host nanostructured block copolymer matrix. This opens new perspectives in the field of polymeric composites related to the maximum enhancement of effective physical properties and to the numerous possible applications that arise due to the presence of long-range order in the spatial distribution of functional nanoparticles.
基金supported by the National Natural Science Foundation of China(Grant Nos.30100092 and 30270666)
文摘Fibroblast growth factor-2 (FGF-2) is a member of a large family of proteins that bind heparin and heparan sulfate and modulate the function of a wide range of cell types. It has been proved that FGF-2 stimulates the growth and development of new blood vessels (angiogenesis) that contribute to the pathogenesis of several diseases (i.e. cancer, atherosclerosis). However, many of the biological activities of FGF-2 have been found to depend on its receptor抯 intrinsic tyrosine kinase activity and second messengers such as the mitogen activated protein kinases. This review will focus on the mechanism of FGF-2/FGFR induced signaling pathway in tumor and human breast cancer.
