bluuebunny/crossref_metadata_2025_split huggingface dataset:
La télésurveillance comme outil favorisant la participation sociale des personnes âgées à domicile
Authors: Garceau Mathieu , Vincent Claude , Robichaud Line 
Published: May 2007

ABSTRACTLittle is known as yet about the impact of telesurveillance services on social participation. To document the interaction between telesurveillance services and social participation of the elderly living at home, a study was conducted in the context of a government call center employing nurses. A focus group study was realized with elders (n=4), caregivers (n=6), healthcare system practitioners and industry employees (n=7). A qualitative analysis was performed using the Disability Creation Process model and generally accepted criteria for evaluating telehealth interventions. The results showed, on the one hand, factors that facilitate the use of telesurveillance services (user's intellectual capabilities, acceptance of clinical settings, relevance of recommendations, cost of service, and accessibility) and, on the other, factors that reinforce such use (user behaviors; level of satisfaction; impact on informal caregiver; system's level of performance; technical features; and life-habit aspects such as personal transportation, sleep, housekeeping, personal care, interpersonal relationships, and recreational activities).
Cover Picture: Large‐Area 3D Nanostructures with Octagonal Quasicrystalline Symmetry via Phase‐Mask Lithography (Adv. Mater. 10/2007)
Authors: Bita I. , Choi T. , Walsh M. E. , Smith H. I. , Thomas E. L. 
Published: May 2007

AbstractA novel method for producing large‐area 3D nanostructured quasicrystalline materials uses 2D multiple exposure lithography to produce an octagonal quasiperiodic surface‐relief template (background image). A replica in polydimethylsiloxane is then used as a phase mask to create 3D bicontinuous axial quasicrystalline SU‐8 epoxy nanostructures (see insets), as reported on p. 1403 by Ion Bita, Edwin Thomas, and co‐workers.
Heat convection from a sphere placed in a fluctuating free stream
Authors: Alassar R. S. , Badr H. M. 
Published: May 2007

AbstractThe effect of sinusoidal fluctuations superimposed on the average free‐stream velocity on mixed convection from a spherical particle is investigated. The parameters considered are the Reynolds number Re, Grashof number Gr, and the relative amplitude of fluctuations. The results indicate that due to the adverse pressure gradients created by the deceleration of the free‐stream, separation may occur at a Reynolds number well below that at which it occurs in uniform flow. The rising buoyancy currents, however, weaken and possibly destroy the formation of vortices at the rear stagnation point. The average Nusselt number is found to increase with the increase of the amplitude of the free stream fluctuations and with the increase of Gr/Re2, as along as the flow does not reverse its direction. The time and space averaged Nusselt number increases with Gr/Re2, with the effect of the amplitude of the free‐stream fluctuations becoming less pronounced at higher values of Gr/Re2. © 2007 American Institute of Chemical Engineers AIChE J, 2007
Cation‐exchange kinetics and electrical conductivity studies of an ‘organic‐inorganic’ composite cation‐exchanger: Polypyrrole Th(IV) phosphate
Authors: Khan Asif Ali , Inamuddin  
Published: May 2007

AbstractPolypyrrole Th(IV) phosphate, an electrically conducting ‘organic‐inorganic’ cation‐exchange composite material was prepared by the incorporation of an electrically conducting polymer, i.e., polypyrrole, into the matrix of a fibrous type inorganic cation‐exchanger thorium(IV) phosphate. The composite cation‐exchanger has been of interest because of its good ion‐exchange capacity, higher chemical and thermal stability, and high selectivity for heavy metal ions. The temperature dependence of electrical conductivity of this composite system with increasing temperatures was measured on compressed pellets by using four‐in‐line‐probe dc electrical conductivity measuring instrument. The conductivity values lie in the semiconducting region, i.e., in the order of 10−6 to 10−4 S cm−1 that follow the Arrhenius equation. Nernst–Plank equation has been applied to determine some kinetic parameters such as self‐diffusion coefficient (D0), energy of activation (Ea), and entropy of activation (ΔS*) for Mg(II), Ca(II), Sr(II), Ba(II), Ni(II), Cu(II), Mn(II), and Zn(II) exchange with H+ at different temperatures on this composite material. These results are useful for predicting the ion‐exchange process occurring on the surface of this cation‐exchanger. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Preparation and antibacterial activity of PET/chitosan nanofibrous mats using an electrospinning technique
Authors: Jung Kyung‐Hye , Huh Man‐Woo , Meng Wan , Yuan Jiang , Hyun Seok Hee , Bae Jung‐Sook , Hudson Samuel M. , Kang Inn‐Kyu 
Published: May 2007

AbstractThe nanofiber deposition method, by electrospinning, was employed to introduce antibacterial activity and biocompatibility to the surface of poly (ethylene terephthalate) (PET) textiles. The polymer blends of PET and chitosan were electrospun on to the PET micro‐nonwoven mats for biomedical applications. The PET/chitosan nanofibers were evenly deposited on to the surface, and the diameter of the nanofibers was in the range between 500 and 800 nm. The surface of the nanofibers was characterized using SEM, ESCA, AFM, and ATR‐FTIR. The wettability of the PET nanofibers was significantly enhanced by the incorporation of chitosan. The antibacterial activity of the samples was evaluated utilizing the colony counting method against Staphylococcus aureus and Klebsiella pneumoniae. The results indicated that the PET/chitosan nanofiber mats showed a significantly higher growth inhibition rate compared with the PET nanofiber control. In addition, the fibroblast cells adhered better to the PET/chitosan nanofibers than to the PET nanofibers mats, suggesting better tissue compatibility. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Flocculation properties and adsorption kinetics of cationic starches in kaolin suspensions
Authors: Chen Yanxiao , Liu Shaoying , Wang Gongying 
Published: May 2007

AbstractThe flocculation characteristics of cationic starches with degree of substitution (DS 0.32–0.63) have been evaluated in 1.0 wt % kaolin suspension by spectrophotometry and colloid titration. Cationic starch is found to be an effective flocculant for removal of anionic suspension particles. Changes in the electrokinetics of kaolin as a function of pH were investigated in the absence of flocculant. The results show that kaolin in water exhibits a negative surface charge at pH > 2.5. The negative hydrophilic surface sites of kaolin are responsible for the adsorption of cationic starch molecules. The experimental data of the adsorption of cationic starch (DS 0.51) follow a Langmuir isotherm with maximum adsorption capacities of 16.89 mg/g. For the adsorption of cationic starch, chemical reaction seems significant in the rate‐controlling step and the pseudosecond‐order chemical reaction kinetics provides the best correlation for the experimental data. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Miscibility characterization of SMA/SAN and SMA/PMMA blends by differential scanning calorimetry and fluorescence techniques
Authors: Fang Haixia , Mighri Frej , Ajji Abdellah 
Published: May 2007

AbstractIn this study, styrene‐maleic anhydride (SMA) copolymer was modified by monoesterification method with 9‐(hydroxymethyl)anthracene fluorophore to prepare a fluorescent anthracene labeled SMA (SMA‐An) material. The latter was then characterized by attenuated total reflection (ATR) and thermogravimetric analysis (TGA) techniques. In the second step of this work, SMA‐An was added to SMA/[Styrene‐Acrylonitrile Copolymer (SAN)] and SMA/[Poly(methyl methacrylate) (PMMA)] blends to investigate the miscibility of these blends at the molecular level. The miscibility of SMA/PMMA blends was characterized using fluorescence quenching of anthracene by the succinic anhydride and succinic acid functions on SMA macromolecule itself. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Polyarylacetylene blends with improved processability and high thermal stability
Authors: Wang Ming‐Cun , Zhao Tong 
Published: May 2007

AbstractNovel binary blends of polyarylacetylene (PAA resin) with propargyl‐novoalc resin (PN resin) was prepared. The miscibility, processing capability, and thermal properties of the blends were investigated. The evaluation of the blends as matrice for thermostructural composites was also studied. The blends were highly miscible. In comparison to PAA resin, the blends exhibited remarkably improved processability suitable to various process techniques (especially resin transfer molding, RTM). By dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA), it was revealed that the cured blends possessed high thermal stability. The blend with 1/2 PN content was evaluated as matrices. The high temperature mechanical properties of silica laminates were compared favorably with those of conventional phenolic laminate. When compared with pure PAA laminate, the blend matrix laminate exhibited improved mechanical properties at both ambient temperature and high temperature. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
Alumina‐filled polystyrene micro‐ and nanocomposites prepared by melt mixing with and without latex precompounding: Structure and properties
Authors: Siengchin S. , Karger‐Kocsis J. , Thomann R. 
Published: May 2007

AbstractAlumina fillers were incorporated in polystyrene (PS) in 4.5 wt % by melt blending with and without latex precompounding. Latex precompounding was used for the latex‐mediated predispersion of the alumina particles. The related masterbatch was produced by mixing PS latex with water dispersible boehmite alumina in various particle sizes followed by drying. The dispersion of the alumina in the PS was studied by transmission and scanning electron microscopy (TEM and SEM, respectively). The mechanical and thermomechanical properties of the PS composites were determined in uniaxial tensile, dynamic‐mechanical thermal analysis (DMTA), and short‐time creep tests performed at various temperatures. In addition, the melt flow of the composites was characterized in a plate/plate rheometer. It was found that direct melt mixing of the alumina with PS resulted in micro‐, whereas the masterbatch technique in nanocomposites. The stiffness and resistance to creep (summarized in master curves) of the nanocomposites were improved compared to those of the microcomposites. The properties of the composites were upgraded by decreasing nominal size of the water dispersible alumina. The preparation technique and the size of the alumina particles affected the tensile strength, melt viscosity, and heat distortion temperature in lesser extent than the stiffness and thus compliance data. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007
X‐ray diffraction methods in the study of the effect of microwave heating on the transformation of cellulose I into cellulose II during mercerization
Authors: Moharram M. A. , Mahmoud Osama M. 
Published: May 2007

AbstractX‐ray diffraction (XRD) techniques were used in the study of the effect of microwave (MW) heating on the structural properties of cotton celluloses I and II and on the mercerization mechanism of cotton fibers. Samples of celluloses I and II were MW heated at 900 W for different times ranging from 10 to 40 min. The obtained data revealed that MW heating of cellulose II in opened glass tubes produces no significant effects on the resolution of its XRD patterns, whereas the most evident effects occur when cotton fibers (cellulose I) are heated in opened tubes at 900 W for 10 and 20 min. Also, mixtures of cotton fibers and aqueous solution of NaOH with different concentrations were exposed to MW radiation for different times and different powers. It was found that MW heating has no considerable effects on the mechanism of transformation of cellulose I into cellulose II during mercerization. On the other hand, MW heating of cotton fibers during mercerization reduces the values of concentration of NaOH in the aqueous solution and the time of treatment that are needed for the complete transformation of cellulose lattice type I into cellulose lattice type II without any heating. Also it was found that the magnitude of reductions depends on the applied power. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
AeMg5In3 (Ae: Ba, Sr): New Intermetallic Compounds with Well‐Differentiated Roles for the Normal Cation Types.
Authors: Li Bin , Corbett John D. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Second‐Sphere Ligand‐Field Effects in Solid Solution of Anhydrous Transition‐Metal Phosphates.
Authors: Thauern H. , Glaum R. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Nanoporous Crystal 12CaO×7Al2O3: A Playground for Studies of Ultraviolet Optical Absorption of Negative Ions.
Authors: Hayashi Katsuro , Sushko Peter V. , Munoz Ramo David , Shluger Alexander L. , Watauchi Satoshi , Tanaka Isao , Matsuishi Satoru , Hirano Masahiro , Hosono Hideo 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Thermodynamic Description of the Au—Si—Sn System.
Authors: Meng F. G. , Liu H. S. , Liu L. B. , Jin Z. P. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis, Structure, and Magnetism of Np2O5.
Authors: Forbes Tori Z. , Burns Peter C. , Skanthakumar S. , Soderholm L. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
First Enantioselective Reductive Amination of α‐Fluoroenones.
Authors: Dutheuil Guillaume , Bailly Laetitia , Couve‐Bonnaire Samuel , Pannecoucke Xavier 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Control of Diastereoselectivity in Tandem Asymmetric Reactions Generating Nonadjacent Stereocenters with Bifunctional Catalysis by Cinchona Alkaloids.
Authors: Wang Baomin , Wu Fanghui , Wang Yi , Liu Xiaofeng , Deng Li 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Synthesis and Characterization of Some 2‐(1‐Phenyl‐3‐(thiophen‐2‐yl)‐1H‐pyrazol‐4‐yl)‐4H‐chromon‐4‐ones, 4‐(2‐Hydroxyphenyl)‐6‐(1‐phenyl‐3‐ (thiophen‐2‐yl)‐1H‐pyrazol‐4‐yl)pyrimidine‐2‐(1H)‐thione, 2‐(5‐(1‐Phenyl‐3‐ (thiophen‐2‐yl)‐1H‐pyrazol‐4‐yl)‐1H‐pyrazol‐3‐yl)phenol and 2‐(2,3‐Dihydro‐2‐(1‐phenyl‐3‐(thiophen‐2‐yl)‐1H‐pyrazol‐4‐yl)benzo[b] [1,4]thiazepin‐4‐yl)phenol.
Authors: More M. S. , Shingare M. S. , Kale S. B. , Dalvi N. R. , Karale B. K. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Small but Effective: Copper Hydride Catalyzed Synthesis of α‐Hydroxyallenes.
Authors: Deutsch Carl , Lipshutz Bruce H. , Krause Norbert 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
The First Example of 2,2‐Dilithiocyanocyclopropanes: Generation from 2‐Bromo‐2‐sulfinylcyanocyclopropanes with tert‐Butyllithium, Property, and a Synthesis of Fully Substituted Cyanocyclopropanes.
Authors: Fukushima Iori , Gouda Youhei , Satoh Tsuyoshi 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Cyclopalladated Ferrocenylimines: Efficient Catalysts for Homocoupling and Sonogashira Reaction of Terminal Alkynes.
Authors: Yang Fan , Cui Xiuling , Li Ya‐nan , Zhang Jinli , Gen Ge‐rui , Wu Yangjie 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Three‐Component Coupling Reactions of Thioformamides with Organolithium and a Grignard Reagents Leading to Formation of Tertiary Amines and a Thiolating Agent.
Authors: Murai Toshiaki , Asai Fumio 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ytterbium Perfluorooctanesulfonate Catalyzed Synthesis of Acylals from Aldehydes and Acetic Anhydride in a Fluorous Biphasic System.
Authors: Yi Wen‐Bin , Yin Ya‐Qing , Cai Chun 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
An Efficient Cobalt(I)‐Catalyzed Reformatsky Reaction Using α‐Chloro Esters.
Authors: Lombardo Marco , Gualandi Alessandra , Pasi Filippo , Trombini Claudio 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Ring Expansion Reactions of 4‐Amino‐1,1‐dioxo‐[1,2,3,5]‐thiatriazoles.
Authors: Duggan Peter J. , Liepa Andris J. , O'Dea Laura K. , Tranberg C. Elisabet 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Efficient Synthesis of Optically Active 4,5‐Dihydroxy‐2,3,4,5‐tetrahydro‐1H‐1‐benzazepine Derivatives Utilizing Lipase‐Catalyzed Transesterification.
Authors: Ohtani Tadaaki , Kitano Kazuyoshi , Matsubara Jun , Kawano Yoshikazu , Komatsu Makoto , Uchida Minoru , Tabusa Fujio , Nagao Yoshimitsu 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Design and Synthesis of Telomestatin Derivatives and Their Inhibitory Activity of Telomerase.
Authors: Tera Masayuki , Sohtome Yoshihiro , Ishizuka Hiromichi , Doi Takayuki , Takagi Motoki , Shin‐ya Kazuo , Nagasawa Kazuo 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Porphyrins with β,β′‐Fused Five‐Membered Rings
Authors: Smith Kevin M. , Lee Sang Hee , Vicente M. Graca H. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
1,1‐Bis(nitrogen‐functionalized) Alk‐1‐enes: Alk‐1‐ene‐1,1‐diamines
Authors: Kantlehner W. 
Published: May 2007

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Chiroptical properties of diamino carboxylic acids
Authors: Bredehöft Jan Hendrik , Breme Katharina , Meierhenrich Uwe J. , Hoffmann Søren V. , Thiemann Wolfram H.‐P. 
Published: May 2007

AbstractDiamino carboxylic acids have recently come to the attention of scientists working in the field of early life and its development. These are the monomers of a hypothetic early form of genetic material, the so‐called Peptide Nucleic Acid (PNA) (Nielson et al., Proc Natl Acad Sci USA 2000;97:3868–3871). Since all biopolymers rely on a specific handedness of their building blocks, the question of symmetry breaking occurs in diamino acids and PNA in the same way as in amino acids and proteins. One possible mechanism for triggering this, is asymmetric photochemistry in interstellar/circumstellar matter by means of circularly polarized light (Bailey et al., Science 2005;281:672–674; Bailey, Orig Life Evol Biosphere 2001;21:167–183; Buschermöhle, Astrophys J 2005;624:821–826; Meierhenrich, Angew Chem Int Ed Engl 2005;44:5630–5634). Here we have measured the CD‐spectra of four chiral diamino carboxylic acids, three of which were found in the Murchison meteorite (Meierhenrich, Proc Natl Acad Sci USA 2004;101:9182–9186). The spectra show a uniform peak at 200 nm. These results and additional quantum mechanical calculations of the involved molecular orbitals support the assumption that the process of symmetry breaking in diamino acids does not depend significantly on the length of the side chain. This means that one process alone could suffice to lead to symmetry breaking in all four measured diamino carboxylic acids and might even to some extent be transferable to monoamino acids, the monomers of proteins. Chirality, 2007. © 2007 Wiley‐Liss, Inc.