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Modification of the adsorption and catalytic properties of micro-and mesoporous materials by reactions with organometallic complexes

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Science China Chemistry 2010年第9期53卷 1862-1869页

作者： lefebvre Frédéric PUTAJ Piotr basset jean-marie Université de Lyon ICL C2P2 UMR 5265(CNRS-CPE-Université Lyon 1) LCOMS-CPE Lyon

This review describes the work of two laboratories in the field of the modification of micro-and mesoporous molecular sieves through reactions with organometallic *** modification of zeolites can occur inside the pore channels or on the external surface,depending on the size of the organometallic *** the modification occurs on the external surface,it results in a decrease of the pore entrance,which will lead in turn to a modification of the sorption properties of the zeolite,by decreasing the rate of the adsorption(mainly by a kinetic control).Such a material can be also used in catalysis,because the external acid sites,which are responsible for side-reactions,have been removed upon *** small organometallic complexes are used,they can fill the channels and cages of the zeolite and react with internal hydroxyl *** to the high acidity of zeolites,the reaction occurs very easily(for example at-100℃ on faujasite),in contrast to what is observed on the external surface,therefore leading to high metal *** that case,the modification of the sorption properties will be mainly related to a thermodynamic *** resulting materials can be useful in catalysis,by combining the activity of the organometallic complex and properties(for example shape-selectivity) of the *** of mesoporous molecular sieves occurs always in the pores and results in altering of the sorption properties of the solid,by changing the interaction type between the sorbent and the *** example the sorption isotherm of alkanes is changed from type II to type III according to the IUPAC nomenclature.

关键词： zeolites transition metals organometallic compounds adsorption properties

Predictive approach of heterogeneous catalysis

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National Science Review 2018年第5期5卷 633-635页

作者： jean-marie basset Jérémie D.A.Pelletier King Abdullah University of Science and Technology

‘Predictive catalysis’ or ‘catalysis by design’ has recently advanced heterogeneous catalysis by using the conceptual tool of surface fragments [1] such as ‘surface organometallic fragments’(SOMF)or ‘surface coordination fragments’(SCF) to achieve and understand a presumed catalytic cycle (see Fig. 1).One or several fragments of the molecule

关键词： SCF CR CO EXAFS

沸石表面有机金属化学──ZSM-5外表面上—Ge(n-C_4H_9)_x基团的接枝及其性质研究

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高等学校化学学报 2001年第2期22卷 285-288页

作者：王绪绪赵慧霞付贤智 Frédéric lefebvre jean-marie basset 福州大学光催化研究所福州350002 Laboratoire de Chimie Organo métalliquede Surface

用气体分析及IR ,NMR和元素分析等方法研究了真空系统中 2 30和 2 80℃下四丁基锗在ZSM 5沸石表面上的接枝反应 ,并对所得沸石的热稳定性和吸附性质进行了表征 .与作者曾报道的在硅胶及丝光沸石上的反应类似 ,四丁基锗也能与ZSM 5沸石... 详细信息

用气体分析及IR ,NMR和元素分析等方法研究了真空系统中 2 30和 2 80℃下四丁基锗在ZSM 5沸石表面上的接枝反应 ,并对所得沸石的热稳定性和吸附性质进行了表征 .与作者曾报道的在硅胶及丝光沸石上的反应类似 ,四丁基锗也能与ZSM 5沸石表面上的硅羟基发生缩合反应 ,在其外表面或孔口生成组成为 (≡Si—O) xGe(n C4 H9) 4-x(x =13)的表面有机锗化合物 .在 2 30℃接枝丁基锗基团不影响沸石的结构和表面积 ,仅改变它的孔口大小 .在改性后的沸石上 ,N2 的吸附性质没有改变 ,而不同分子尺寸的烃 ,如正己烷、2 甲基戊烷、2 ,3 二甲基丁烷却呈现出完全不同于起始ZSM 5沸石的择形吸附效应 .

关键词： ZSM-5 四丁基锗表面修饰有机金属化合物表面接枝反应沸石

Localized magnetization reversal processes in cobalt nanorods with different aspect ratios

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Nano Research 2015年第7期8卷 2231-2241页

作者： Marc Pousthomis Evangelia Anagnostopoulou Ioannis Panagiotopoulos Rym Boubekri Weiqing Fang frederic Ott Kahina Ait Atmane jean-Yves Piquemal Lise-marie Lacroix Guillaume Viau Universite de Toulouse LPCNO UMR 5215 INSA CNRS UPS 135 av de Rangueil 31077 Toulouse Cedex 4 France Laboratoire Leon Brillouin CEA/CNRS UMR 12 IRAMIS CEA-Saclay 91191 Gifsur Yvette France Department of Materials Science and Engineering University ofloannina Ioannina 45110 Greece Universite Paris Diderot Sorbonne Paris Cite ITODYS CNRS UMR 7086 15 rueJ.-A de Baif 75205 Paris Cedex 13 France

We present results of the synthesis of cobalt nanorods using the polyol process and the mechanism of magnetization reversal. We show that the nucleation step is significantly dependent on the nature of the ruthenium chloride used as the nucleating agent. This allows varying the diameter and aspect ratio of the cobalt nanorods independently. Co nanorods with aspect ratio, mean diameter, and mean length in the ranges ARm =3-16, Din= 7-25 nm, and Lm=30-300 nm, respectively, were produced using this method. X-ray diffraction and electron microscopy showed that a strong discrepancy between the structural coherence and morphological aspect ratio can exist because of stacking faults. The coercivity of assemblies of different nanorods was systematically measured, and the highest values were obtained for the smallest diameter and the largest structural coherence length. Micromagnetic simulations were performed to account for the dependence of the coercive field on the diameter. An important observation is that simple coherent magnetization rotation models do not apply to these magnetic nano-objects. Even for very small diameters （Dm = 5-10 nm） well below the theoretical coherent diameter Dcoh（CO）= 24 nm, we observed inhomogeneous reversal modes dominated by nucleation at the rod edges or at structural defects such as stacking faults. We conclude that, in order to produce high-coercivity materials based on nanowires, moderate aspect ratios of 5-10 are sufficient for providing a structural coherence similar to the morphological aspect ratio. Thus, the first priority should be to avoid the formation of stacking faults within the Co nanowires.

关键词： nanorod nanowire permanent magnets micromagnetic calculations shape anisoteopy

Performances of local poultry breed fed black soldier fly larvae reared on horse manure

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Animal Nutrition 2018年第1期4卷 73-78页

作者： Nassim Moula marie-Louise Scippo Caroline Douny Guy Degand Edwin Dawans jean-Francois Cabaraux jean-Luc Hornick Rudy C.Medigo Pascal Leroy frederic Francis Johann Detilleux Fundamental and Applied Research for Animal&Health Animal Production DepartmentFaculty of Veterinary MedicineUniversity of Liege Fundamental and Applied Research for Animal&Health Food Science DepartmentFaculty of Veterinary MedicineUniversity of Liege Functional and Evolutionary Entomology Gembloux Agro-Bio TechUniversity of Liege

In poultry,feed based on maggots,like larvae of black soldier fly(Hermetia illucens) is an attractive option to substitute current ingredients which are expensive and often in direct or indirect competition with human *** information is currently available on the utility of these larvae in poultry feed,so goals of this study were to determine whether larvae could be reared on horse manure under traditional farming conditions and to evaluate the growth performances of a local poultry fed these larvae and the fatty acids profiles of their *** freezing and thawing,larvae were introduced in the feed of Ardennaise chickens between 30 and 80 days of *** in the control group received a commercial standard feed,while those in the treatment group received the same commercial feed in which 8% was substituted with whole fresh larvae corresponding to 2% on a dry matter *** ± standard errors of larval length and weight were 20.67 ± 2.21 mm and 0.14 ± 0.02 g,*** larval percentages of dry matter and of substances extractable in diethyl ether were 24.6% and 23.1%,*** fatty acids profiles were predominantly composed of lauric acid(28.1%) and palmitic acid(22.0%).Least squares means of weekly weights of chicken,adjusted for the effects of sex,replication and initial weights,were significantly higher(P < 0.05) by 77.03 ± 53.37 g in larvae-fed than in control *** other measurements were not statistically different between larvae-fed and control chicken,including fatty acid profiles,protein content and w6/w3 ratio.

关键词： Insect farming Chicken Local breed Growth performance Meat quality Fatty acid profile

Thin films of binary amorphous Zn-Zr alloys developed by magnetron co-sputtering for the production of degradable coronary stents:A preliminary study

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Bioactive Materials 2018年第4期3卷 385-388页

作者： Nathalie Annonay Fatiha Challali marie-Noelle Labour Valerie Bockelee A.Garcia-Sanchez Florent Tetard marie-Paule Besland Philippe Djemia frederic Chaubet Laboratoire de Science des Materiaux et des Procedes UPR CNRS 3407Universite Paris 13Sorbonne-Paris-CiteInstitut Galilee99 av J.B.Clement93430VilletaneuseFrance Laboratory for Vascular Translational Science Inserm U1148Universite Paris 13Universite Paris-DiderotSorbonne-Paris-CiteInstitut Galilee99 av J.B.Clement93430VilletaneuseFrance Institut des Materiaux jean Rouxel(IMN)UMR CNRS 6502 Universite de Nantes2rue de la HoussiniereB.P.3222944322Nantes Cedex 3France

*** Vascular stents are endo-prostheses that allow the restoration of blood flow in case of obstruction of a vessel.A stent usually consists of a corrosion-resistant metal such as Nitinol,316L steel or a CoCr alloy[1].Many studies have been undertaken for the production of polymer degradable stents[2,3]or metallic stents[4,5]and,among these,devices made of pure zinc or crystallized alloy based on zinc obtained by molding and extrusion are promising in terms of biodegradability,biocompatibility and mechanical properties[6],but also concerning the degradation rate of the stent which should to be effective until arterial remodeling and tissue healing are complete[5].The objective of this preliminary study is the comparison of the degradation in simulated biological medium and the endothelial cytotoxicity of amorphous and crystallized thin ZnZr films according to their composition and *** this work,the thin layers were deposited on silicon substrates by magnetron *** technology is already used to make metal stents[7,8].

关键词： alloy alloys corrosion

Statistical Study of foF2 Diurnal Variation at Dakar Station from 1971 to 1996:Effect of Geomagnetic Classes of Activity on Seasonal Variation at Solar Minimum and Maximum

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International Journal of Geosciences 2015年第3期6卷 201-208页

作者： Ali Mahamat Nour Ouattara frederic Zerbo jean Louis Gyebre Aristide marie frederic Nanema Emmanuel Zougmore Francois Laboratoire de Materiaux et Environnement(LAME) UFR SEA Universite de OuagadougouOuagadougouBurkina Faso Laboratoire de Recherche en Energetique et Meteorologie de l’Espace(LAREME) Universite de KoudougouKoudougouBurkina Faso Institut des Sciences Exactes et Appliquees(ISEA) Universite Polytechnique de Bobo DioulassoBobo DioulassoBurkina Faso Centre National de Recherches Scientifiques et Techniques(CNRST) Institut de Recherches Scientifiques Appliquees et Technologies(IRSAT)OuagadougouBurkina Faso

The statistical study of F2 layer critical frequency at Dakar station from 1971 to 1996 is carried out. This paper shows foF2 statistical diurnal for all geomagnetic activities and all seasons and that during solar maximum and minimum phases. It emerges that foF2 diurnal variation graphs at Dakar station exhibits the different types of foF2 profiles in African EIA regions. The type of profile depends on solar activity, season and solar phase. During solar minimum and under quiet time condition, data show?the signature of a strength electrojet that is coupled with intense counter electrojet in the afternoon. Under disturbed conditions,?mean intense electrojet is observed in winter?during fluctuating and recurrent activities. Intense counter electrojet is seen under fluctuating and shock activities in all seasons coupled with strength electrojet in autumn. In summer?and spring under all geomagnetic activity condition, there is intense counter electrojet. During solar maximum, in summer and spring there is no electrojet under geomagnetic activity conditions.?Winter shows a mean intense electrojet. Winter and autumn are marked by the signature of the reversal electric field.

关键词： foF2 Diurnal Variation Solar Cycle Phases Geomagnetic Activity Classes Seasonal Effects E Region Electric Currents

HACD1,a regulator of membrane composition and fluidity,promotes myoblast fusion and skeletal muscle growth

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分子细胞生物学报:英文版 2015年第5期7卷 429-440页

作者： Jordan Blondelle Yusuke Ohno Vincent Gache Stephane Guyot Sebastien Storck Nicolas Blanchard-Gutton Ines Barthelemy Gemma Walmsley Anaelle Rahier Stephanie Gadin marie Maurer Laurent Guillaud Alexandre Prola Arnaud Ferry Genevieve Aubin-Houzelstein jean Demarquoy frederic Relaix Richard JPiercy Stephane Blot Akio Kihara Laurent Tiret Fanny Pilot-Storck Inserm IMRB U955-E1094000 CreteilFrance Universite Paris-Est Ecole nationale veterinaire d’Alfort(EnvA)94700 Maisons-AlfortFrance Universite Paris-Est Creteil Faculte de medecine94000 CreteilFrance Laboratory of Biochemistry Faculty of Pharmaceutical SciencesHokkaido UniversitySapporo 060-0812Japan Universite de Bourgogne UMR A 02.102 PAM-EPMBAgroSup Dijon21000 DijonFrance Institut Necker-Enfants Malades INSERM U1151-CNRS UMR 8253Sorbonne Paris CiteUniversite Paris DescartesFaculte de Medecine-Site Broussais75015 ParisFrance Comparative Neuromuscular Disease Laboratory Department of Clinical Sciences and ServicesRoyal Veterinary CollegeLondon NW10TUUK Therapie des maladies du muscle strie INSERM U974-CNRS UMR7215-UPMC UM76-Institut de Myologie Universite Pierre et Marie Curie-Universite Paris Descartes75000 ParisFrance Universite de Bourgogne Faculte des Sciences GabrielBio-PeroxIL21000 DijonFrance

The reduced diameter of skeletal myofibres is a hallmark of several congenital myopathies,yet the underlying cellular and molecular mechanisms remain *** this study,we investigate the role of HACD1/PTPLA,which is involved in the elongation of the very long chain fatty acids,in muscle fibre *** humans and dogs,HACD1 deficiency leads to a congenital myopathy with fibre size disproportion associated with a generalized *** of HACD1-deficient Labradors,Hacd1-knockout mice,and Hacd1-deficient myoblasts,we provide evidence that HACD1 promotes myoblast fusion during muscle development and *** further demonstrate that in normal differentiating myoblasts,expression of the catalytically active HACD1 isoform,which is encoded by a muscle-enriched splice variant,yields decreased lysophosphatidylcholine content,a potent inhibitor of myoblast fusion,and increased concentrations of≥C18 and monounsaturated fatty acids of *** lipid modifications correlate with a reduction in plasma membrane *** conclusion,we propose that fusion impairment constitutes a novel,non-exclusive pathological mechanism operating in congenital myopathies and reveal that HACD1 is a key regulator of a lipid-dependent muscle fibre growth mechanism.

关键词： centronuclear myopathy LPC MUFA PTPLA VLCFA

CD8^(+)CD226^(high)T cells in liver metastases dictate the prognosis of colorectal cancer patients treated with chemotherapy and radical surgery

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Cellular & Molecular Immunology 2023年第4期20卷 365-378页

作者： Julien Viot Syrine Abdeljaoued Angélique Vienot Evan Seffar Laurie Spehner Adeline Bouard Kamal Asgarov jean-RenéPallandre Elodie Renaude Elodie Klajer ChloéMolimard Franck Monnien frederic Bibeau Celia Turco Bruno Heyd Paul Peixoto Eric Hervouet Romain Loyon Alexandre Doussot Christophe Borg marie Kroemer Department of Medical Oncology Biotechnology and Immuno-Oncology PlatformUniversity Hospital of BesançonBesançonFrance INSERM EFS BFCUMR1098RIGHTUniversity of Franche-ComtéInteractions Greffon-Hôte-Tumeur/Ingénierie Cellulaire et GéniqueBesançonFrance Department of Pathology University Hospital of BesançonBesançonFrance Department of Surgery University Hospital of BesançonBesançonFrance EPIGENEXP platform University of Bourgogne Franche-ComtéBesançonFrance Department of Pharmacy University Hospital of BesançonBesançonFrance

CD226 has been reported to participate in the rescue of CD8^(+)T cell *** this study,we aimed to assess the prognostic value of CD226 in tumor-inﬁltrating lymphocytes(TILs)derived from colorectal cancer(CRC)liver metastases treated with chemotherapy and radical *** from 43 metastases were isolated and analyzed ex vivo usingﬂow ***155 and CD3 levels in the tumor microenvironment were assessed by *** and validation of biological processes highlighted in this study were performed by bioinformatics analysis of bulk RNA-seq results for 28 CRC liver metastases pretreated with chemotherapy as well as public gene expression ***226 expression contributes to the deﬁnition of the immune context in CRC liver metastases and primary ***226 on CD8^(+)T cells was not speciﬁcally coexpressed with other immune checkpoints,such as PD1,TIGIT,and TIM3,in liver *** Cox regression analysis revealed CD226 expression on CD8^(+)T cells to be an independent prognostic factor(p=0.003),along with CD3 density at invasion margins(p=0.003)and TIGIT expression on CD4^(+)T cells(p=0.019).CD155 was not associated with the prognostic value of *** expression analysis in a validation dataset conﬁrmed the prognostic value of CD226 in CRC liver metastases but not in primary *** of CD226 on CD8^(+)TILs in the liver microenvironment was restored by IL15 ***,CD226 expression on liver metastasis-inﬁltrating CD8^(+)T cells selectively contributes to immune surveillance of CRC liver metastases and has prognostic value for patients undergoing radical surgery.

关键词： CD226 antigen Colorectal Neoplasms Liver metastasis Lymphocytes Tumor-Inﬁltrating