bluuebunny/crossref_metadata_2025_split huggingface dataset:
Soft Mechanical Sensors Through Reverse Actuation in Polypyrrole
Authors: Wu Y. , Alici G. , Madden J. D. W. , Spinks G. M. , Wallace G. G. 
Published: September 2007

AbstractThe phenomenon of voltage generated from a soft sensor using polypyrrole in response to mechanical deformation is described and investigated. The sensor consists of two polypyrrole layers in contact with an electrolyte and operates in bending mode in air. The magnitude and sign of the induced voltage was found to depend on the type of dopant counter‐ions and the nature of the surrounding electrolyte. The mechanical sensor response is shown to be a “reverse actuation”, generating millivolt signals for millimeter sized deflections or ∼ 1000 C m–3 charge for 1 % strain in the polypyrrole layer. A model based on ‘Deformation Induced Ion Flux' has been proposed whereby the strain induced volume change in the polymer produces a shift in the Donnan equilibrium between mobile dopant ions inside the polymer and in the external electrolyte. A simple thermodynamic model provides reasonable estimates of the size of the voltage and charge produced.
A Molecularly Imprinted Copolymer Designed for Enantioselective Recognition of Glutamic Acid
Authors: Ouyang R. , Lei J. , Ju H. , Xue Y. 
Published: September 2007

AbstractA newly designed molecularly imprinted polymer (MIP) material was developed and successfully used as recognition element to fabricate a capacitive sensor for enantioselective recognition of glutamic acid (Glu). The MIP with a well‐defined structure was synthesized on a gold electrode in one step by electrochemical copolymerization of o‐phenylenediamine (o‐PD) and dopamine (DA) in the presence of template molecule Glu. The resulting MIP material was characterized with a potentiostatic frequency scan method, cyclic voltammetry, capacitance measurements, atomic force microscopy, and X‐ray photoelectron spectroscopy. The structure and recognition behaviour of the copolymer film to template molecule depended on its composition. The optimal composition was at the o‐PD to DA molar ratio of 3:2. With a potentiostatic time scan method the copolymer displayed high enantioselectivity and sensitivity to the stereoselective rebinding of L‐ or D‐Glu to their corresponding artificial receptor due to the exact definition of the imprint cavity. The capacitance response of the sensor for L‐Glu or D‐Glu was proportional to their concentration in the range of 16.7 to 250 μM. The enantiometric selectivity coefficients for L‐Glu and D‐Glu imprinted films against their respective enantiomers are 24 and 15, respectively. The resulting MIP capacitive sensors showed good reproducibility, stability and repeatability. This strategy opened a convenient way for preparation of enantioselective MIPs and recognition of enantiotropic molecules.
Orders‐of‐Magnitude Reduction of the Contact Resistance in Short‐Channel Hot Embossed Organic Thin Film Transistors by Oxidative Treatment of Au‐Electrodes
Authors: Stadlober B. , Haas U. , Gold H. , Haase A. , Jakopic G. , Leising G. , Koch N. , Rentenberger S. , Zojer E. 
Published: September 2007

AbstractIn this study we report on the optimization of the contact resistance by surface treatment in short‐channel bottom‐contact OTFTs based on pentacene as semiconductor and SiO2 as gate dielectric. The devices have been fabricated by means of nanoimprint lithography with channel lengths in the range of 0.3 μm < L < 3.0 μm. In order to reduce the contact resistance the Au source‐ and drain‐contacts were subjected to a special UV/ozone treatment, which induced the formation of a thin AuOx layer. It turned out, that the treatment is very effective (i) in decreasing the hole‐injection barrier between Au and pentacene and (ii) in improving the morphology of pentacene on top of the Au contacts and thus reducing the access resistance of carriers to the channel. Contact resistance values as low as 80 Ω cm were achieved for gate voltages well above the threshold. In devices with untreated contacts, the charge carrier mobility shows a power‐law dependence on the channel length, which is closely related to the contact resistance and to the grain‐size of the pentacene crystallites. Devices with UV/ozone treated contacts of very low resistance, however, exhibit a charge carrier mobility in the range of 0.3 cm2 V–1 s–1 < μ < 0.4 cm2 V–1 s–1 independent of the channel length.
Platinum Nanoparticles Supported on Ionic Liquid‐Modified Magnetic Nanoparticles: Selective Hydrogenation Catalysts
Authors: Abu‐Reziq Raed , Wang Dashan , Post Michael , Alper Howard 
Published: September 2007

AbstractA method for supporting platinum nanoparticles on magnetite nanoparticles is described. The method requires modification of the surface of the magnetic nanoparticles with ionic liquid groups. Before modification, the magnetic nanoparticles are not stable and easily aggregate and, after modification, the magnetite nanoparticles become highly stable and soluble in polar or non‐polar organic solvents depending on the alkyl group of the linked ionic liquids. The supporting of platinum nanoparticles on the modified magnetic nanoparticles was achieved by adsorbing platinum salts (K2PtCl4) on the surface of the magnetite nanoparticles via ion exchange with the linked ionic liquid groups and then reducing them by hydrazine. The supported platinum nanoparticles were applied in the catalytic hydrogenation of alkynes in which cis‐alkenes were selectively produced, and in the hydrogenation of α,β‐unsaturated aldehydes where the allyl alcohols were obtained as the exclusive products. The new catalyst can be easily separated from the reaction mixtures by applying an external magnetic field and recycled.
Hydrodynamics and mass transfer in a turbulent buoyant bubbly shear layer
Authors: Ayed H. , Chahed J. , Roig V. 
Published: September 2007

AbstractExperimental analysis and numerical simulation of hydrodynamics and mass transfer in a turbulent oxygen–water bubbly shear layer is presented. The experimental data presents the structure of the averaged and fluctuating velocity fields as well as those of the gas volumetric fraction and the local dissolved oxygen concentration. Numerical simulations have been performed using Euler–Euler two‐fluid model that provides some specific modeling adapted for gas–liquid bubbly flows and allows a reasonable representation of the two‐phase flow structure (fields of average velocities and volumetric fractions of the two phases) as well as the important modulation of the turbulence in the two‐phase flow. With the improvements of two‐phase flow prediction, the averaged oxygen concentration field is also well predicted. The analysis of these results supports the pertinence of some improvements in two‐phase flow modeling and allows some proposals for further progress in the development of more general multiphase models for complex gas–liquid systems. © 2007 American Institute of Chemical Engineers AIChE J, 2007
Enhanced vascular responses to hypocapnia in neurally mediated syncope
Authors: Norcliffe‐Kaufmann Lucy Jane , Kaufmann Horacio , Hainsworth Roger 
Published: September 2007

AbstractObjectiveThe susceptibility to suffer neurally mediated syncope and loss of consciousness varies markedly. In addition to vasodilatation and bradycardia, hyperventilation precedes loss of consciousness. The resultant hypocapnia causes cerebral vasoconstriction and peripheral vasodilatation. We postulate that more pronounced cerebral and peripheral vascular responses to reductions in arterial CO2 levels underlie greater susceptibility to neurally mediated syncope.MethodsWe compared vascular responses to CO2 among 31 patients with histories of recurrent neurally mediated syncope and low orthostatic tolerance and 14 age‐ and sex‐matched control subjects with no history of syncope and normal orthostatic tolerance. Vascular responses to CO2 were calculated after all subjects had fully recovered and their blood pressures and heart rates were stable. We measured blood flow velocity in the middle cerebral artery (transcranial Doppler) and in the left brachial artery (brachial Doppler), and end‐tidal CO2 during voluntary hyperventilation and hypoventilation (end‐tidal CO2 from 21–45mm Hg), and determined the slopes of the relations.ResultsHypocapnia produced a significantly greater reduction in cerebral blood flow velocity and in forearm vascular resistance in patients with neurally mediated syncope than in control subjects. Opposite changes occurred in response to hypercapnia. In all subjects, the changes in cerebral blood flow velocity and forearm vasodilatation were inversely related with orthostatic tolerance.InterpretationSusceptibility to neurally mediated syncope can be explained, at least in part, by enhanced cerebral vasoconstriction and peripheral vasodilatation in response to hypocapnia. This may have therapeutic implications. Ann Neurol 2007
Hydroxyalkylation of barbituric acid. II. Synthesis of polyetherols with pyrimidine ring
Authors: Ślączka Anna , Lubczak Jacek 
Published: September 2007

AbstractThe route of synthesis of new polyetherols with pyrimidine ring from barbituric acid (BA) was presented. The polyetherols were obtained in two steps: synthesis of hydroxymethyl derivative of BA followed by reaction of the latter with neat ethylene or propylene oxides. Physical properties of the products and preliminary application for fabrication of thermal stability polyurethane foams were determined. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
High resolutionq‐space imaging studies of water in elastin
Authors: Boutis Gregory , Renner Christopher , Isahkarov Tamara , Islam Tasneem , Kannangara Lahiru , Kaur Pavitarjit , Mananga Eugene , Ntekim Atim , Rumala Yisa , Wei Doug 
Published: September 2007

AbstractWe report on the direct measurement of the molecular diffusion coefficients of water confined to purified bovine nuchal ligament elastin by high resolutionq‐space NMR imaging. The experimental data indicate that water trapped within an elastin fiber has two distinguishable molecular diffusion coefficients. The component with the slowest mobility has a diffusion coefficient on the order of 10−6cm2/s that varies inversely with the diffusion time and is seen to reduce near 37°C. The component with higher mobility has a diffusion coefficient reminiscent of free water but is observed to also behave similarly at 37°C. From our experimental data we extract the surface‐to‐volume ratio of pores within elastin and associated changes as a function of temperature. © 2007 Wiley Periodicals, Inc. Biopolymers 87: 352–359, 2007.This article was originally published online as an accepted preprint. The “Published Online” date corresponds to the preprint version. You can request a copy of the preprint by emailing the Biopolymers editorial office at biopolymers@wiley.com
Using “ethics labs” to set a framework for ethical discussion in an undergraduate science course
Authors: Smith Kelly , Wueste Daniel , Frugoli Julia 
Published: September 2007

AbstractTeaching ethics across the curriculum is a strategy adopted by many universities. One of the fundamental aims of teaching ethics across the curriculum is to get students to see ethics as truly relevant to the subjects they are studying. Ideally, students will come to see that ethics is a thread woven deeply in the fabric of all knowledge and practice. The standard approach, in which students are required to take a separate ethics course, is not especially well suited to this task, but incorporating ethics into science courses presents significant challenges and is likely to meet with resistance, if only because professors in the sciences are often untrained in the teaching of ethics. In an effort to raise the standard of science education as well as comply with a university‐wide curricular mandate, we as a team developed the concept of an “ethics lab.” We discuss the design of the exercises done during laboratory sections, the training of the graduate students who run the exercises, and the iterations of the exercises over time. We report unanticipated rapid positive outcomes of an attempt to integrate ethics education into a sophomore/junior level science course, Introduction to Genetics.
Image‐based modeling of 3D objects with curved surfaces
Authors: Lee Man Hee , Park In Kyu 
Published: September 2007

AbstractThis paper addresses an image‐based method for modeling 3D objects with curved surfaces based on the non‐uniform rational B‐splines (NURBS) representation. The user fits the feature curves on a few calibrated images with 2D NURBS curves using the interactive user interface. Then, 3D NURBS curves are constructed by stereo reconstruction of the corresponding feature curves. Using these as building blocks, NURBS surfaces are reconstructed by the known surface building methods including bilinear surfaces, ruled surfaces, generalized cylinders, and surfaces of revolution. In addition to them, we also employ various advanced techniques, including skinned surfaces, swept surfaces, and boundary patches. Based on these surface modeling techniques, it is possible to build various types of 3D shape models with textured curved surfaces without much effort. Copyright © 2007 John Wiley & Sons, Ltd.
The Crystal Structure of Ce16Ru8In37.
Authors: Murashova E. V. , Kurenbaeva Zh. M. , Tursina A. I. , Noel H. , Rogl P. , Grytsiv A. V. , Gribanov A. V. , Giester G. , Seropegin Yu. D. 
Published: September 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.
Reversible Bromide—Chloride Exchange in Zirconium Cluster Compounds: Synthesis by Means of Ionic Liquids, Structures, and Some Spectral Data of (EMlm)4[(Zr6Z)Br18] Cluster Phases (Z = Be, Fe).
Authors: Willems Johannes B. , Rohm Henning W. , Geers Christine , Koeckerling Martin 
Published: September 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 New Ternary Silicides Ln6Co1.67Si3 (Ln: Ce, Nd, Gd, Tb, Dy) Investigated by X‐Ray Diffraction and Magnetization Measurements.
Authors: Chevalier B. , Gaudin E. , Weill F. 
Published: September 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.
Mukaiyama Aldol Reaction of Ester Acceptors: Organoaluminums Catalyze Nucleophilic Addition of Ketene Silyl Acetals.
Authors: Iwata Shin , Hamura Toshiyuki , Matsumoto Takashi , Suzuki Keisuke 
Published: September 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.
Neighboring Group Effect of Oxime Functions in the Dehydrogenation of 2‐Phenylpiperidine Derivatives.
Authors: Moehrle Hans , Gehlen Michael 
Published: September 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.
Direct Transformation of Benzylic Amines to Carbonyls Using Polyacrylamide‐Bound Tungstate under Phase‐Transfer Catalysis Conditions.
Authors: Hamamoto Hiromi , Suzuki Yachiyo , Takahashi Hideyo , Ikegami Shiro 
Published: September 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.
Copper‐Catalyzed Substitution Reactions of Acylal with Organomanganese Reagents.
Authors: Deshmukh Madhukar B. , Jadhav Sunil D. , Kadam Shashikant V. 
Published: September 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.
Copper‐Catalyzed Magnesium‐Barbier Reaction for γ‐Selective Alkyl—Allyl Coupling.
Authors: Erdik Ender , Kocoglu Melike 
Published: September 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.
Tandem Gold(I)‐Catalyzed Cyclization/Electrophilic Cyclopropanation of Vinyl Allenes.
Authors: Lemiere Gilles , Gandon Vincent , Cariou Kevin , Fukuyama Takahide , Dhimane Anne‐Lise , Fensterbank Louis , Malacria Max 
Published: September 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.
Enantioselective Synthesis of Protected Amines by the Catalytic Asymmetric Addition of Hydrazoic Acid to Ketenes.
Authors: Dai Xing , Nakai Takashi , Romero Jan A. C. , Fu Gregory C. 
Published: September 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.
Tagged Phosphine Reagents to Assist Reaction Work‐Up by Phase‐Switched Scavenging Using a Modular Flow Reactor.
Authors: Smith Christopher D. , Baxendale Ian R. , Tranmer Geoffrey K. , Baumann Marcus , Smith Stephen C. , Lewthwaite Russell A. , Ley Steven V. 
Published: September 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.
Magnesiation of Electron‐Rich Aryl Bromides and Their Use in Nickel‐Catalyzed Cross‐Coupling Reactions.
Authors: Lau Stephen Y. W. , Hughes Greg , O'Shea Paul D. , Davies Ian W. 
Published: September 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.
Rhodium‐Catalyzed Conjugate Addition—Enantioselective Protonation: The Synthesis of α,α′‐Dibenzyl Esters.
Authors: Frost Christopher G. , Penrose Stephen D. , Lambshead Kim , Raithby Paul R. , Warren John E. , Gleave Robert 
Published: September 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.
Metallation Reactions. Part 36. A Study on the Metalation of (Methylthio)‐ and (Methylsulfonyl)thiophenes.
Authors: Fattuoni Claudia , Usai Michele , Cabiddu Maria G. , Cadoni Enzo , De Montis Stefania , Sotgiu Francesca , Cabiddu Salvatore 
Published: September 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.
A New Method for Efficient Coupling of Indole and Epoxide Catalyzed with Yb(O‐Tf)3, and Application to the Total Synthesis of Kurasoin B.
Authors: Tsuchiya Satoshi , Sunazuka Toshiaki , Shirahata Tatsuya , Hirose Tomoyasu , Kaji Eisuke , Omura Satoshi 
Published: September 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 of Some 1,3,4‐Oxadiazole Derivatives as Potential Antiinflammatory Agents.
Authors: Amir Mohd , Javed S. A. , Kumar Harish 
Published: September 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.
New Synthesis of 3‐Bromoflavones (V) via Bromination of 1‐(2‐Hydroxyphenyl)‐3‐arylpropane‐1,3‐dione (IV) by CuBr2, and Conversion into 3‐Aminoflavones.
Authors: Miyake Hideyoshi , Nishino Shouko , Nishimura Akinori , Sasaki Mitsuru 
Published: September 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 of 1,2,3,4‐Tetrahydroisoquinoline‐1‐carboxylic Acid Derivatives via Ugi Reactions.
Authors: Schuster Ildiko , Sztojkov‐Ivanov Anita , Lazar Laszlo , Fueloep Ferenc 
Published: September 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 of Some 2‐Oxo‐ and 2‐Thioxo‐Substituted Pyrimidines Using Solvent‐Free Conditions.
Authors: Mobinikhaledi Akbar , Forughifar Naser , Safari Jila Alipour , Amini Ehsan. 
Published: September 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.
Effect of Substituent Structure on Pyrimidine Electrophilic Substitution.
Authors: van der Westhuyzen Christiaan W. , Rousseau Amanda L. , Parkinson Christopher J. 
Published: September 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.
Diastereodifferentiating [4 + 2]‐Photocycloaddition of Tegafur with Naphthalene.
Authors: Ohkura Kazue , Sugaoi Tatsuyuki , Takahashi Masayuki , Seki Koh‐ichi 
Published: September 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 of Some Novel Fused Oxo‐ and Thiopyrimidines via an Intramolecular Friedel—Crafts Reaction.
Authors: Mobinikhaledi Akbar , Foroughifar Naser , Javidan Abdollah , Amini Ehsan 
Published: September 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.
Parallel Synthesis of a Novel C2‐Aryl Pyrrolo[2,1‐c][1,4]benzodiazepine (PBD) Library.
Authors: Antonow Dyeison , Cooper Nectaroula , Howard Philip W. , Thurston David E. 
Published: September 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.
Parviflorene J, a Cytotoxic Sesquiterpene Dimer with a New Rearranged Skeleton from Curcuma parviflora.
Authors: Tamaki Mayu , Sadhu Samir Kumar , Ohtsuki Takashi , Toume Kazufumi , Koyano Takashi , Kowithayakorn Thaworn , Hayashi Masahiko , Komiyama Kanki , Ishibashi Masami 
Published: September 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.
Stereocontrolled Synthesis of (‐)‐Galanthamine.
Authors: Satcharoen Vachiraporn , McLean Neville J. , Kemp Stephen C. , Camp Nicholas P. , Brown Richard C. D. 
Published: September 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.