bluuebunny/crossref_metadata_2025_split huggingface dataset:
Surface Interactions for Controlling the Microfluidic Separation of Polymeric Microspheres
Authors: Sadeghi Alireza , Howse Jonathan , Ebbens Steve , De Geest Bruno 
Published: October 2011

ABSTRACTApplications of self-assembled monolayers (SAMs) formed by the adsorption of alkanethiols onto gold surfaces have had a widespread growth in adhesion investigations, interfacial interaction investigations and other interfacial phenomena in recent years. As computational modelling showed that modified surfaces can segregate compliant microspheres, a microfluidic flow cell was designed to roll polymeric microcapsules on surfaces with different chemistries, in order to obtain experimental data to validate previous results. Particle image velocimetry showed that rolling speed of microcapsules is affected by surface chemistry. The velocity of vesicles rolling on thiol surfaces with positive of negative charged head groups was significantly lower than vesicles rolling on thiol surfaces with a hydrocarbon chain head group and pure gold surface respectively. Since fabrication of patterned SAMs with different thiol surfaces is possible through oxidation by UV light, our results point to a facile method for carrying out a continuous separation process.
A Sliding Mode Control for Four-Wire Shunt Active Filter
Authors: Hamoudi Farid , Chaghi Aziz , Adli Mouloud , Amimeur Hocine 
Published: October 2011

A Sliding Mode Control for Four-Wire Shunt Active Filter
The present paper deals with the sliding mode control of a three-phase four-wire shunt active filter SAF, to improve phase-current waveform, neutral current mitigation and reactive power compensation in electric power distribution system. The sliding mode is formulated using elementary differential geometry, then the control vector is deduced from the sliding surface accessibility using the Lyapunov stability. The algorithm used to establish the current references for the sliding mode controller is based on the instantaneous real and imaginary power theory for four-wire system. It will be seen that this method permits to synthesis the control vector with simple manner, and finally, the obtained simulation results confirm that the above objectives are satisfied.
Misère de l'État-Providence aux États-Unis : l'exemple de la politique américaine du logement
Authors: Jorion Paul 
Published: October 2011

Résumé Il est montré que si la notion d’État-Providence semble à première vue absente aujourd’hui aux États-Unis, d’une part il n’en a pas toujours été ainsi, celui-ci ayant été dominant dans la période dite du New Deal (1933–1941), d’autre part l’État-Providence règne en maître dans le secteur du logement. La délégation de la politique gouvernementale américaine du logement aux organismes mixtes, mi-publics, mi-privés, que sont les Government Sponsored Entities a fait faillite au cours des années récentes, les préoccupations de leurs deux maîtres, le gouvernement d’une part, ses actionnaires et ses dirigeants, de l’autre, s’étant révélées contradictoires : le gouvernement porte en effet prioritairement son attention aux populations défavorisées alors que la logique de profit encourage au contraire l’accent mis sur les services offerts aux propriétaires les plus fortunés.
L'autonomie enfantine à l'épreuve des « surdoués »
Authors: Lignier Wilfried 
Published: October 2011

Résumé Le sociologue gagne à s’intéresser à l’ usage de l’autonomie enfantine plutôt qu’à son degré . On se demande ici, à partir d’éléments ethnographiques, si les investissements faits en propre par des enfants dits « surdoués » (ceux qu’ils font en personne, mais aussi en tant que groupe) s’articulent ou non au contexte général d’affirmation et/ou de construction du type d’excellence culturelle auquel correspond leur labellisation. C’est une relative cohérence des pratiques des enfants et des adultes qui peut être observée. La notion d’autonomie enfantine doit sans doute renvoyer, non pas à une liberté accordée à de jeunes « acteurs », mais à une place des enfants dans une enfance donnée, c’est-à-dire dans un ensemble socialement situé de pratiques, concernant des enfants et des adultes.
RESF : une forme originale de critique de la xénophobie
Authors: Fischman Marianne , Fournier Jean-Pierre 
Published: October 2011

Face aux discours cherchant à stigmatiser l’étranger, à le présenter comme un danger sinon un problème, le Réseau Éducation Sans Frontières (RESF) construit à double titre une critique plus radicale qu’elle pourrait paraître au premier abord. Le RESF remet en cause les représentations et les perceptions xénophobes de l’altérité par le biais de son entrée tout à fait spécifique sur ce sujet : les enfants scolarisés et leurs familles sans-papiers. Nous montrerons tout d’abord comment cette entrée ne lui permet pas simplement de sensibiliser, du point de vue humanitaire, à sa cause. Elle lui permet surtout de faire découvrir l’autre comme victime exploitée, dépendante, opprimée. Ensuite, le RESF construit cette critique de la xénophobie en utilisant un mode d’organisation tout à fait original : la structure en réseau. Nous montrerons comment celle-ci lui permet d’élaborer une critique sociale là où les organisations traditionnelles n’y parviennent plus.
Sciences humaines et humanité
Authors: Lantz Pierre 
Published: October 2011

RÃ©sumÃ© Pendant un siècle, de Durkheim à Bourdieu, la sociologie française universitaire a tenté de mieux répondre que la philosophie aux problèmes des sociétés en se définissant comme une science. La segmentation de l’Université en disciplines autonomes a permis cette affirmation de la sociologie. Garantie par une méthode circonscrite, elle se voulait une science comme les autres. Mais cette indépendance de la sociologie était limitée puisque ses questions et leur traitement lui étaient suggérées par ses commanditaires ou par l’État. Plus elle se voulait libre de tout préjugé, plus elle oubliait sa dépendance de fait et sa limitation aux faits. Ne faudrait-il pas revenir au conseil de Husserl qui demandait aux « fonctionnaires de l’Humanité » de ne pas réduire leurs ambitions aux conditions de fait mais de se référer à nouveau à l’horizon de l’Humanité ?
La responsabilité des générations
Authors: Chauvel Louis 
Published: October 2011

Resumé Les générations sont bien plus qu’un fluide passif de l’histoire : elles posent une question de justice. Or les 25 dernières années nous ont confrontés à l’installation d’une fracture silencieuse. Celle-ci représente un appel à s’intéresser au sort de la génération née entre 1955 et 1975 : plus que les autres, elle porte les séquelles de la crise.
Partir sans arriver, la migration paradoxale des marins philippins
Authors: Berger Catherine 
Published: October 2011

Resumé Mercenaires du commerce mondialisé. Des hommes qui partent et reviennent sans être jamais arrivés nulle part et qui vivent sur le lieu de leur dur travail. Des figures particulières de migrants, marqués par la réussite mais aussi par la souffrance et le « sacrifice ».
Être riche, la classe! (entretien)
Authors: Pinçon Michel , Pinçon-Charlot Monique 
Published: October 2011

Resumé Monique Pinçon-Charlot et Michel Pinçon, sociologues, ont consacré leurs travaux à la grande bourgeoisie et à l’aristocratie. Ils ont notamment publié : Le président des riches , Zones, 2010, Les ghettos du gotha , Seuil, 2007, Sociologie de la bourgeoisie , La Découverte, 2005.
Sélectionner des candidats en toute légalité
Authors: Denis Pascale L. , Paré Frédéric , Asselin Sophie 
Published: October 2011

Résumé Comment l’organisation peut-elle s’assurer qu’elle ne sélectionne pas des candidats sur la base d’informations discriminatoires? Entre les tests, les entrevues, la prise de références et l’examen médical, que doit-elle choisir afin de se prémunir contre des poursuites éventuelles? Voilà autant de questions relatives à la sélection du personnel qui trouvent un écho dans les lois. Cet article vise à informer les employeurs sur le cadre légal québécois qui s’applique à la sélection (particulièrement les droits fondamentaux des candidats, l’interdiction de la discrimination en emploi et la protection des renseignements personnels). Il fait ressortir l’importance de déterminer clairement les exigences du poste à pourvoir pour qu’en découle un choix avisé d’outils d’évaluation, d’appliquer ces outils rigoureusement et avec discernement et de minimiser le recours aux méthodes d’évaluation intrusives. Fonctions : GRH, management, droit, international
Démystifier les inventaires de personnalité
Authors: Boudrias Jean-Sébastien , Morin Denis 
Published: October 2011

Résumé L’expérience et les recherches révèlent que le savoir-être des personnes explique autant, sinon plus, la performance au travail que leur savoir et leur savoir-faire. Le savoir-être réside dans les compétences douces regroupant les qualités personnelles et l’engagement potentiel du candidat dans un milieu de travail. Mais comment peut-on reconnaître les candidats qui possèdent un savoir-être ou une personnalité compatible avec le poste à pourvoir, le contexte de travail et l’organisation? L’article vise à montrer aux gestionnaires comment l’inventaire de personnalité, soit l’analyse approfondie de nombreux traits personnels, du savoir-être et des compétences douces, peut les aider à prendre des décisions en matière de sélection, de promotion et de développement du personnel. Après avoir défini cet outil d’évaluation et en avoir présenté des exemples, nous exposons ses atouts et ses limites. Nous résumons également les règles légales et professionnelles que les employeurs doivent respecter dans la gestion des inventaires de personnalité. De nombreuses recommandations sont faites à l’intention des gestionnaires quant au choix d’un inventaire de personnalité et à ses conditions de succès, tout en précisant que l’inventaire de personnalité doit constituer avant tout un outil d’aide à la décision. Fonctions : GRH, management, psychologie
Classifying Seizures and Epilepsies: Limits of Science and Semantics
Authors: Devinsky Orrin , Najjar Souhel 
Published: October 2011

“If I wished to show a student the difficulties of getting at truth from medical experience, I would give him the history of epilepsy to read.” Oliver Wendell Holmes ( 1 ) If the medical experience of epilepsy is obscured by uncertainties, then its classification is mired in the mud of expert opinion. The newly revised terms and concepts for “organizing” (also known as “classifying”) seizures and epilepsy provide a humble and modern perspective, with many superb suggestions ( 2 ). The central points are well articulated and valid: 1) divorcing classification from “expert opinion” and marrying it to science; 2) acknowledging what is unknown; and 3) simplifying and clarifying terminology. Yet, the revision lacks the crisp clarity needed to educate students, patients, and colleagues. And some recommendations lack a clear scientific or semantic basis.
Determination of neodymium (III) in human plasma and environmental samples with poly(allyl glycidyl ether/iminodiacetic acid‐ co‐dimethylacrylamide) brushes grafted onto siliceous support
Authors: Sadeghi Hayedeh Bagheri , Panahi Homayon Ahmad , Ghasemi Maryam , Moniri Elham , Galaev Igor Yu 
Published: October 2011

AbstractThe increased utilization of mechanically stable synthetic matrices, particularly silica gel as a solid support and its surface modification by covalent polymer grafting through a spacer unit for extractive concentration of trace neodymium in human biological fluid and environmental samples are highlighted in the present article. First, silica surface was modified by silylation with 3‐mercaptopropyltrimethoxysilane followed by graft polymerization. Modified silica was grafted with polymer containing a functional monomer for metal chelating, poly[1‐(N, N‐bis‐carboxymethyl)amino‐3‐allylglycerol‐co ‐dimethylacrylamide] (poly(AGE/IDA‐co‐DMAA). The resulting sorbent has been characterized by FTIR, elemental analysis, FT‐Raman, thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). The sorption capacity of the functionalized sorbent was 53.3 mg g−1. The chelating sorbent can be reused for 15 cycles of sorption–desorption without any significant change in sorption capacity. The profile of neodymium uptake on this sorbent reflects good accessibility of the chelating sites in the poly(AGE/IDA‐co‐DMAA)‐grafted silica gel. Scatchard analysis revealed that the homogeneous binding sites were formed in the polymers. The equilibrium adsorption data of Nd(III) on modified sorbent were analyzed by Langmuir, Freundlich, Temkin, and Redlich–Peterson models. The method was successfully applied for determination of neodymium ions in human plasma and sea water sample. © 2011 Wiley Periodicals, Inc. Adv Polym Techn 31: 257–270, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/adv.20249
Coffin–Lowry syndrome and left ventricular noncompaction cardiomyopathy with a restrictive pattern
Authors: Martinez Hugo R. , Niu Mary C. , Sutton V. Reid , Pignatelli Ricardo , Vatta Matteo , Jefferies John L. 
Published: October 2011

AbstractCoffin–Lowry syndrome (CLS) is an X‐linked dominant condition characterized by moderate to severe mental retardation, characteristic facies, and hand and skeletal malformations. The syndrome is due to mutations in the gene that encodes the ribosomal protein S6 kinase‐2, a growth factor‐regulating protein kinase located on Xp22.2. Cardiac anomalies are known to be associated with CLS. Left ventricular noncompaction (LVNC) is a clinically heterogeneous disorder characterized by left ventricular (LV) myocardial trabeculations and intertrabecular recesses that communicate with the LV cavity. Patients may present with a variety of clinical phenotypes, ranging from a complete absence of symptoms to a rapid, progressive decline in LV systolic and diastolic function, resulting in congestive heart failure, malignant ventricular tachyarrhythmias, and systemic thromboembolic events. Restrictive cardiomyopathy is an uncommon primary cardiomyopathy characterized by biatrial enlargement, normal or decreased biventricular volume, impaired ventricular filling, and normal or near‐normal systolic function. We describe a patient with CLS and LVNC with a restrictive pattern, as documented by echocardiography and cardiac catheterization. To our knowledge, there have been no previous reports of concomitant CLS and LVNC. On the basis of our case, we suggest that patients with CLS be screened not only for congenital structural heart defects but also for LVNC cardiomyopathy. © 2011 Wiley Periodicals, Inc.
Drug release from electrospun fibers of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) grafted with poly(N‐vinylpyrrolidone)
Authors: Wang Wei , Cao Jianda , Lan Ping , Wu Wen 
Published: October 2011

AbstractPoly(N‐vinylpyrrolidone) (PVP) groups were grafted onto poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV) backbone to modify the properties of PHBV and synthesize a new novel biocompatible graft copolymer. Based on these graft copolymers, electrospun fiber mats and commonly cast films were explored as drug delivery vehicles using tetracycline hydrochloride as a model drug. Toward that end, the fibers were electrospun and the films were cast from chloroform solutions containing a small amount of methanol to solubilize the drug. The Brookfield viscosities of the solution were determined to achieve the optimal electrospinning conditions. The vitro release of the tetracycline hydrochloride from these new drug delivery systems was followed by UV–vis spectroscopy. To probe into the factors affected on the release behavior of these drug delivery systems, their water absorbing abilities in phosphate buffer solution were investigated, together with their surface hydrophilicity, porosity and crystallization properties were characterized by water contact angles, capillary flow porometer, DSC, and WAXD, respectively. The morphological changes of these drug delivery vehicles before and after release were also observed with SEM. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Ultrasonic properties and morphology of devulcanized rubber blends
Authors: Zhu Shui‐Han , Penlidis Alexander , Tzoganakis Costas , Ginzel Ed 
Published: October 2011

AbstractThe ultrasonic properties of two devulcanized rubber (DR) blends with a styrene‐butadiene‐styrene (SBS) copolymer compound (ACE) are investigated using a transmission method. The DR materials are obtained from commercial rubber crumbs (RC) by a proprietary devulcanization technique. Measurements on the acoustic attenuation and travel velocity are conducted on the samples with different sample thicknesses in the pulsed mode. Attenuation coefficients of the materials are obtained by changing the frequency of the ultrasound in the tuned tone‐burst mode. The two DR/ACE blends show marked differences in the attenuation and attenuation coefficient, although the ultrasonic velocities are similar. These differences arise from the variation of the remaining degree of crosslinking in the DR materials. The acoustic velocities in the three materials are similar. The morphologies of the DR/ACE blend samples, observed using scanning electron microscopy (SEM) with different staining agents, explain their similarities and differences. There are two crops of rubber particles: larger ones belong to the original rubber crumbs that survived devulcanization; the smaller ones are fragments of partially DR. These crosslinked particles contribute to the overall degree of crosslinking in the blends. The devulcanized fractions of the DR materials are dispersed in the ACE matrix. Scattering at the interface accounts for the differences in the acoustic attenuation of the samples. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Fabrication and characterization of silk fibroin/poly(ethylene glycol)/cellulose nanowhisker composite films
Authors: Li Rongji , Zhang Yanhong , Zhu Liangjun , Yao Juming 
Published: October 2011

AbstractThe flexible and transparent composite films were fabricated by a mixture of silk fibroin (SF), poly(ethylene glycol), and mulberry cellulose nanowhiskers (CNWs). The CNWs were uniformly dispersed in the matrix when its content was as high as 12 w/w%. The tensile properties of composite films generally depended on the nanowhisker content, but significantly improved when compared to the pure SF film. DMA analysis revealed that the alpha transition temperature increased gradually with the increase of nanowhisker content, probably due to the formation of interactions between the nanowhiskers and the SF molecular chains, leading to the mobility reduction of the amorphous SF. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
Vapour pressure and vapourisation enthalpy of pyridine N‐oxide
Authors: Zeng Zuo‐Xiang , Chen Jing , Xue Wei‐Lan , Zhang Pan , Xie Yuan 
Published: October 2011

AbstractThe vapour pressure of pyridine N‐oxide was measured using a boiling point method at different temperatures from 389.02 to 546.33 K and the constants of the Antoine equation for the substance were determined. The vapourisation enthalpy of pyridine N‐oxide at the normal boiling point is calculated to be 58.8 ± 1.8 kJ mol−1. Based on Othmer's method, the standard enthalpy of vapourisation ${\rm \Delta }_{{\rm vap}} H(298.15\;{\rm K})$ is estimated to be 66.6 ± 0.1 kJ mol−1 by using pyridine as the reference substance. Furthermore, Watson equation is employed to verify the reliability of ${\rm \Delta }_{{\rm vap}} H(298.15\,{\rm K})$and the results demonstrate that the value of ${\rm \Delta }_{{\rm vap}} H(298.15\;{\rm K})$ is acceptable. © 2011 Canadian Society for Chemical Engineering
Hydrothermal Syntheses and Crystal Structures of Two Layered Nickel(II) Coordination Polymers Based on 1,2,3‐Benzenetricarboxylic Acid
Authors: Wang Jing , Xu Min , Song Lingying , Liu Zhaoqing 
Published: October 2011

AbstractThe hydrothermal reactions of Ni(II), 1,2,3‐benzenetricarboxylic acid (1,2,3‐H3btc) and 4,4′‐bipyridine (4,4′‐bpy)/1,2‐bis(4‐pyridyl)ethane (bpa) yield two layered nickel(II) coordination polymers, [Ni2(1,2,3‐btc)(OAc)‐(4,4′‐bpy)2(H2O)]·2H2O (1) and [Ni(ip)(bpa)] (2) (ip=isophthalate), respectively. Both complexes are 2‐D coordination network based on 1‐D Ni‐carboxylate chains. The 1,2,3‐btc ligand adopts 3‐bridging mode in complex1, but transformed to isophthalate (ip) ligand through decarboxylation in2. The formation of the two complexes indicates that hydrothermal conditions andin‐situ ligand reaction have significant effect on constructing coordination polymers.
MgO Nanoparticles as a Recyclable Heterogeneous Catalyst for the Synthesis of Polyhydroquinoline Derivatives under Solvent Free Conditions
Authors: Ranjbar‐Karimi Reza , Hashemi‐Uderji Somayeh , Bazmandegan‐Shamili Alireza 
Published: October 2011

AbstractMagnesium oxide nanopartticels in average size between 35–120 nm were prepared by sonochemistry method. Synthesis of polyhydroquinoline derivatives using MgO nanoparticles from the reaction of dimedone, benzaldehyde, ethyl acetoacetate and ammonium acetate under solvent‐free conditions is reported. Easy handling, reusability, thermal stability and non‐toxicity of the catalyst make the present protocol as an eco‐friendly and economically acceptable method for synthesis of these heterocycles.
Convenient One Pot Synthesis and Antibacterial Evaluation of Some New Mannich Bases Carrying 1,2,4‐Triazolyl Moiety
Authors: Arafa Wael A. A. , Mohamed Asmaa S. 
Published: October 2011

AbstractA series of Mannich bases were synthesized by a three‐component Mannich reaction. The newly synthesized compounds were well characterized by elemental analyses, IR, NMR and mass spectroscopic studies. The potential antibacterial effects of the synthesized compounds were investigated using standard bacterial strains: Gram‐positive and Gram‐negative bacteria. Interestingly, all the synthesized compounds were observed to be promising leads, possessing moderate to significant inhibitory activity as compared to standard.
Synthesis, Crystal Structure and Hydrolysis of a Novel Anhydrogalactosucrose: 2′‐Methoxyl‐O‐1′,4′:3′,6′‐dianhydro‐β‐D‐fructofuranosyl 3,6‐anhydro‐4‐chloro‐4‐deoxy‐α‐D‐galactopyranoside
Authors: Zhang Jingyu , Hou Xuehui , Liu Hongmin 
Published: October 2011

AbstractA novel anhydrogalactosucrose derivative 2′‐methoxyl‐O‐1′,4′:3′,6′‐dianhydro‐β‐D‐fructofuranosyl 3,6‐anhydro‐4‐chloro‐4‐deoxy‐α‐D‐galactopyranoside (4) was prepared from 3,6:1′,4′:3′,6′‐trianhydro‐4‐chloro‐4‐deoxy‐galactosucrose (3) via a facile method and characterized by 1H NMR, 13C NMR and 2D NMR spectra. The single crystal X‐ray diffraction analysis shows that the title molecule forms a two thee‐dimensional network structure by two kinds of hydrogen bond interactions [O(2)H(2)···O(7), O(5)H(5)···O(8)]. Its stability was investigated by acid hydrolysis reaction treated with sulfuric acid, together with the formation of 1,6‐Di‐O‐methoxy‐4‐chloro‐4‐deoxy‐β‐D‐galactopyranose (5) and 2,2‐Di‐C‐methoxy‐1,4:3,6‐dianhydromannitol (6). According to the result, the relative stability of the ether bonds in the structure is in the order: C(1)OC(5)≈C(3′)OC(6′)≈C(1′)OC(4′)>C(3)OC(6)≈C(1)OC(2′)>C(2′)OC(5′).
A New Fluorescent Chemosensor for Metal Ions Based upon 1,8‐Naphthalimide and 8‐Hydroxyquinoline
Authors: Xu Hui , Zeng Xiwen , Dai Huiling 
Published: October 2011

AbstractA new fluorescent chemosensor based upon 1,8‐naphthalimide and 8‐hydroxyquinoline was synthesized, and its fluorescent properties in the presence of different metal cations (Hg2+, Ag+, Zn2+, Fe2+, Cd2+, Pb2+, Ca2+, Cu2+, Mg2+, and Ba2+) were investigated. It displayed fluorescence quenching with some heavy and transition metal (HTM) ions, and the quenching strongly depended on the nature of HTM ions.