bluuebunny/crossref_metadata_2025 huggingface dataset:
Controlled radical polymerization of poly(methyl methacrylate‐g‐epichlorohydrin) using N,N‐dithiocarbamate‐mediated iniferters
Authors: Al‐Kaabi Khalifa , van Reenen Albert J.
Published: February 2008

Poly(epichlorohydrin) (PECH) with pendent N,N‐diethyl dithiocarbamate groups (PECH‐DDC) was prepared by reaction of PECH with sodium N,N‐diethyl dithiocarbamate (DDC) in anhydrous ethanol, before being used as a macrophotoinitiator for the graft polymerization of methyl methacrylate. Photopolymerization was carried out in a photochemical reactor at a wavelength greater than 300 nm. Controlled radical polymerization was confirmed by the linear increase of the molecular weight of polymers with conversion. The polydispersity remained at 1.4–1.6 during polymerization. The formation of PMMA‐g‐PECH copolymer was characterized by GPC, 1H‐NMR, FTIR spectroscopy, and DSC. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Plasma display material prepared from a new blue phosphor dispersion
Authors: Lee Don‐Ik , Lee Sang‐Mock , Byun Younghun , Lee Eun‐Sung , Bae Jin‐Young
Published: February 2008

An improved coating having a high concentration of blue phosphor powder was made with a modified Triton X‐100 dispersant. The barium magnesium aluminate phosphor was very well dispersed in terpineol if the Triton (octyl phenol ethoxylate) had terminal carboxylic acid groups, which had been added to the Triton molecule by chemical synthesis. This improved dispersion was screen‐printed, dried, and then sintered. Because of the very tight packing of the phosphor particles, the photoluminescence intensity of the phosphor film in vacuum ultraviolet excitation was significantly increased up to 10.23%. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Effect of natural and organically modified montmorillonite clays on the properties of polydimethylsiloxane rubber
Authors: Kaneko Manuela L. Q. A. , Yoshida Inez V. P.
Published: February 2008

The effects of natural (MT) and organically modified (O‐MT) montmorillonite clays on the properties of polydimethylsiloxane (PDMS) rubber were evaluated. Rubber composites with different clay contents were prepared by a compounding procedure in an open two‐roll mill, which was followed by a compression‐molding step in which the PDMS matrix was peroxide crosslinked. The clay rubber composites were characterized by swelling measurements in toluene, thermogravimetric analyses, X‐ray diffraction, scanning electron microscopy, and tensile tests. The introduction of MT restricted the solvent swelling and increased the crosslinking density of the rubber, which indicated the formation of a covalent filler–matrix interface. The enhanced interaction between MT and PDMS reduced the aggregation size of MT particles in the MT composites and promoted an increase in the separation of the clay layers. When the rubber was filled with O‐MT, a higher solvent amount was incorporated in the material, and this trend increased with the clay content. Moreover, the low interaction between O‐MT and the PDMS chains resulted in larger clay aggregates in the O‐MT composites compared to those with MT. Despite the different interface natures, both clays enhanced thermal stability and acted as reinforcing fillers in relation to Young's modulus and tensile strength. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Morphology and flame‐retardancy properties of ternary high‐impact polystyrene/elastomer/polystyrene‐encapsulated magnesium hydroxide composites
Authors: Chang Suqin , Xie Tingxiu , Yang Guisheng
Published: February 2008

The effects of elastomer type on the morphology, flammability, and mechanical properties of high‐impact polystyrene (HIPS)/polystyrene (PS)‐encapsulated magnesium hydroxide (MH) were investigated. The ternary composites were characterized by cone calorimetry, mechanical testing, and scanning electron microscopy. Morphology was controlled with poly[styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene] (SEBS) triblock copolymer or the corresponding maleinated poly[styrene‐b‐(ethylene‐co‐butylene)‐b‐styrene] (SEBS‐g‐MA). The HIPS/SEBS/PS‐encapsulated MH composites exhibited separation of the filler and elastomer, whereas the HIPS/SEBS‐g‐MA/PS‐encapsulated MH composites exhibited encapsulation of the filler by SEBS‐g‐MA. The flame‐retardant and mechanical properties of the ternary composites were strongly dependent on microstructure. The composites with an encapsulation structure showed higher flame‐retardant properties than those with a separation structure at the optimum use level of SEBS‐g‐MA. Furthermore, the composites with a separation structure showed a higher modulus and impact strength than those with an encapsulation structure. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci 2008
Novel network polymer electrolytes containing fluorine and sulfonic acid lithium prepared by ultraviolet polymerization
Authors: Li Zhiming , Chen Liwen , Wei Jiangong , Yang Jun , Wang Xinling
Published: February 2008

Novel gel network polymer electrolytes containing fluorine and sulfonic acid lithium were prepared by the ultraviolet polymerization of poly(ethylene glycol) dimethyl acrylate, 2‐acrylamido‐2‐methyl propanesulfonic acid, and trifluoroethyl methacrylate. The network polymer was activated with 1.0M LiPF6/ethylene carbonate/dimethyl carbonate solutions (ethylene carbonate/dimethyl carbonate = 1 : 1 v/v) to prepare gel network polymer electrolytes. The characteristics of the polymer networks, including the gel fractions, thermal stability, liquid electrolyte uptake, and electrochemical properties, were studied. When the poly(ethylene glycol) dimethylacrylate/2‐acrylamido‐2‐methyl propanesulfonic acid/trifluoroethyl methacrylate weight ratio was 60 : 35 : 5, the network polymer electrolytes showed the highest liquid electrolyte uptake (144%) and ionic conductivity (ca. 10−3 S/cm) at room temperature (25°C). The network polymer electrolytes were electrochemically stable up to 5.0 V versus Li+/Li. The excellent performances of the network polymer electrolytes suggest that they are suitable for application in high‐performance lithium‐ion batteries. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci 2008
New macromonomers: Commercially available polycarbonate and polyarylate grafted with unsaturated and alkoxysilyl group pendants
Authors: Sukata Kazuaki , Arakawa Motoomi
Published: February 2008

The insertion reaction of commercially available polycarbonate (PC) and polyarylate (PAR) with unsaturated epoxides produced new macromonomers grafted with many unsaturated group pendants in the middle of the polymer chain in fair to good yields. The insertion reaction readily occurred not only in solvents but also in solid PC. The unsaturated group was hydrosilylated with triethoxysilane to produce triethoxysilyl group pendant PC and PAR, which are expected to be useful for sol–gel precursors for organic–inorganic hybrid materials, in good yields. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci 2008
Copolymerization of poly(1‐naphthylamine) with aniline and o‐toluidine
Authors: Riaz Ufana , Jahan Reshma , Ahmad Sharif , Ashraf S. M.
Published: February 2008

The commercial use of polyaniline has been impeded by its intractable nature and insolubility. The use of substituted polyaniline has been attempted mainly to increase the processibility of polyaniline, but this approach usually results in the lowering of the conductivity. This study reports the synthesis of poly(1‐naphthylamine), a fused ring derivative of polyaniline, and its copolymers with aniline and o‐toluidine via a chemical polymerization method. Spectral, thermal, morphological, and conductivity studies were carried out to elucidate the influence of the incorporation of aniline and o‐toluidine units into poly(1‐naphthylamine). © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
New theoretical treatment of ion resonance phenomena
Authors: Vincze G. , Szasz A. , Liboff A.R.
Published: February 2008

Despite experimental evidence supporting ICR‐like interactions in biological systems, to date there is no reasonable theoretical explanation for this phenomenon. The parametric resonance approach introduced by Lednev has enjoyed limited success in predicting the response as a function of the ratio of AC magnetic intensity to that of the DC field, explaining the results in terms of magnetically induced changes in the transition probability of calcium binding states. In the present work, we derive an expression for the velocity of a damped ion with arbitrary q/m under the influence of the Lorentz force. Series solutions to the differential equations reveal transient responses as well as resonance‐like terms. One fascinating result is that the expressions for ionic drift velocity include a somewhat similar Bessel function dependence as was previously obtained for the transition probability in parametric resonance. However, in the present work, not only is there an explicit effect due to damping, but the previous Bessel dependence now occurs as a subset of a more general solution, including not only the magnetic field AC/DC ratio as an independent variable, but also the ratio of the cyclotronic frequency Ω to the applied AC frequency ω. In effect, this removes the necessity to explain the ICR interaction as stemming from ion–protein binding sites. We hypothesize that the selectively enhanced drift velocity predicted in this model can explain ICR‐like phenomena as resulting from increased interaction probabilities in the vicinity of ion channel gates. Bioelectromagnetics 29:380–386, 2008. © 2008 Wiley‐Liss, Inc.
Effect of weak static and low‐frequency alternating magnetic fields on the fission and regeneration of the planarian dugesia (Girardia) tigrina
Authors: Novikov Vadim V. , Sheiman Inna M. , Fesenko Evgeny E.
Published: February 2008

The effect of weak static (DC) and alternating (AC) magnetic fields (MFs), as well as combined (AC/DC) collinear MFs on the intensity of morphogenesis processes in the planarian Dugesia (Girardia) tigrina has been studied. It was found that combined MFs produce a stimulating effect on the fission and regeneration of planarians. Both components of the combined MFs, the direct (DC) and the alternating (AC), are important in the realization of the effects of weak MFs. The practically complete absence of one of the components (DC) reverses the sign of the effect. It was shown that the presence of concomitant background MFs does not substantially influence the effects of combined MFs with a very small AC component (100 nT). The effect of the “zero” field is significant and comparable in magnitude with the effects of combined MFs at effective frequencies. Narrow zones of effective amplitudes (in the region of tens and hundreds of nT) of the AC component of the combined MFs, with the DC component close to the value of the geomagnetic field were found, which alternate with regions where the response of the biological object to the influence is absent. Bioelectromagnetics 29:387–393, 2008. © 2008 Wiley‐Liss, Inc.
Pressure‐driven perfusion culture microchamber array for a parallel drug cytotoxicity assay
Authors: Sugiura Shinji , Edahiro Jun‐ichi , Kikuchi Kyoko , Sumaru Kimio , Kanamori Toshiyuki
Published: February 2008

This article reports a pressure‐driven perfusion culture chip developed for parallel drug cytotoxicity assay. The device is composed of an 8 × 5 array of cell culture microchambers with independent perfusion microchannels. It is equipped with a simple interface for convenient access by a micropipette and connection to an external pressure source, which enables easy operation without special training. The unique microchamber structure was carefully designed with consideration of hydrodynamic parameters and was fabricated out of a polydimethylsiloxane by using multilayer photolithography and replica molding. The microchamber structure enables uniform cell loading and perfusion culture without cross‐contamination between neighboring microchambers. A parallel cytotoxicity assay was successfully carried out in the 8 × 5 microchamber array to analyze the cytotoxic effects of seven anticancer drugs. The pressure‐driven perfusion culture chip, with its simple interface and well‐designed microfluidic network, will likely become an advantageous platform for future high‐throughput drug screening by microchip. Biotechnol. Bioeng. 2008;100: 1156–1165. © 2008 Wiley Periodicals, Inc.
Direct Evidence for ArOS Bond Cleavage upon Inactivation of Pseudomonas aeruginosa Arylsulfatase by Aryl Sulfamates
Authors: Bojarová Pavla , Denehy Emma , Walker Ian , Loft Karen , De Souza David P. , Woo L. W. Lawrence , Potter Barry V. L. , McConville Malcolm J. , Williams Spencer J.
Published: February 2008

Pseudomonas aeruginosa arylsulfatase catalyses the cleavage of aryl sulfates and is an excellent model for human estrone sulfatase, which is implicated in hormone‐dependent breast cancer. Aryl sulfamates are inactivators of sulfatases; however, little is known about their mechanism. We studied the inactivation of Pseudomonas aeruginosa arylsulfatase A by a range of aryl sulfamates, including the clinical agent 667COUMATE (STX64) used to inactivate estrone sulfatase. Inactivation was time dependent, irreversible, and active‐site directed, consistent with a covalent modification at the active site. In terms of the kinetic parameters of inactivation kinact and Ki, Ki values are in the micromolar to nanomolar range, and the inactivation half‐life is less than 30 s. A Brønsted plot of kinact/Ki has a steep slope (βlg=−1.1), which implies that the transition state for the first irreversible chemical step of inactivation involves a high degree of charge transfer and cleavage of the ArOS bond. Detection of the released phenol and titration of the residual activity showed the stoichiometry of inactivation to be in the range 3–6, with the greatest values found for the most effective inactivators. Thus, multiple sulfamoylation events appear to occur during the inactivation process. These data provide valuable insight into the mechanism of sulfatase inactivation by sulfamates.
Molecular Pacman: Folding, Inclusion, and X‐ray Structures of Tri‐ and Tetraamino Piperazine Cyclophanes
Authors: Raatikainen Kari , Huuskonen Juhani , Kolehmainen Erkki , Rissanen Kari
Published: February 2008

Reaction of piperazine and 1,3‐bis(bromomethyl)‐2‐nitrobenzene under high‐dilution conditions yields cyclic trimeric trinitro, tetrameric tetranitro, and pentameric pentanitro piperazine cyclophanes. Reduction of the nitro groups with SnCl2 under acidic conditions produces the corresponding triamino and tetraamino piperazine cyclophanes. The solution studies of both nitro and amino piperazine cyclophanes at 30 °C by 1H NMR spectroscopy shows symmetrical structures owing to the fast conformational exchange, whereas the low temperature studies of the tetraamino piperazine cyclophane reveals interesting dynamic behavior that indicates additional intramolecular interactions. Careful crystallizations of the trimeric trinitro and triamino and the tetrameric tetraamino cyclophanes resulted in crystals suitable for X‐ray diffraction studies. In the crystalline state the amino‐functionalized cyclophanes manifest an extraordinary circular intramolecular hydrogen‐bonding network that leads to a fixed 3D structure. Hydrogen bonding in the triamino trimer leads to orientation of all three of the amino groups on the same side of the macrocycle, namely, the rcc conformation, whereas the tetraamino tetramer folds into a more compact shell‐like conformation. During the crystallization process one acetonitrile guest is enclosed into the cavity of the tetraamino cyclophane, which gives a crystalline inclusion complex with remarkable resemblance to the famous Pacman motif. The folding, which mimics the behavior of some cyclic peptides and pyrroles, is induced by intramolecular hydrogen bonding from the amino groups to the tertiary amine groups of the piperazines. The cavity of the tetraamino tetramer is markedly smaller than in the corresponding, but nonfolded, tetranitro tetramer and the guest/host volume ratio (packing coefficient) for the acetonitrile and the cavity is approximately 50 %, which indicates a good size match for acetonitrile inclusion.
ChemInform Abstract: Novel Intermetallics with the Ca11Ga7 Structure Type.
Authors: Wendorff Marco , Roehr Caroline
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Low Temperature Magnetic Properties of Layered Compounds: NaLnTiO4 (Ln: Sm, Eu, Gd, Tb, Dy, Ho and Er).
Authors: Ozawa T. C. , Ikoshi A. , Taniguchi T. , Mizusaki S. , Nagata Y. , Noro Y. , Samata H.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: On the Feasibility of Phosphide Generation from Phosphate Reduction: The Case of Rh, Ir, and Ag.
Authors: Sweeney Christina M. , Stamm Kimber L. , Brock Stephanie L.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ionothermal Synthesis and Characterization of a Layered Propylene Diammonium Gallium Phosphate, (C3H12N2)6 [Ga12P16O64]×4.3H2O.
Authors: Lohmeier Sven‐Jare , Wiebcke Michael , Behrens Peter
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Soft‐Chemistry Synthesis of LiNbO3 Crystallites.
Authors: Liu Meinan , Xue Dongfeng , Li Keyan
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Combination of Lacunary Polyoxometalates and High‐Nuclear Transition‐Metal Clusters under Hydrothermal Conditions. Part 5. A Novel Tetrameric Cluster of [{FeIIFeIII12 (μ3‐OH)12 (μ4‐PO4)4} (B‐α‐PW9O34)4]22‐.
Authors: Zhao Jun‐Wei , Zhang Jie , Zheng Shou‐Tian , Yang Guo‐Yu
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Cluster Polymers ∞1[PtBi6Cl10] and ∞1[PtBi6Br10]: Synthesis, Thermochemistry, Crystal Structure and Chemical Bonding.
Authors: Steden Folker , Schmidt Peer , Wahl Bernhard , Isaeva Anna , Ruck Michael
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Dynamic Kinetic and Kinetic Resolution of N‐Boc‐2‐lithiopiperidine.
Authors: Coldham Iain , Patel Jignesh J. , Raimbault Sophie , Whittaker David T. E.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis, Characterization, and Applications in Heck and Suzuki Coupling Reactions of Amphiphilic Cyclopalladated Ferrocenylimines.
Authors: Mu Bing , Li Tiesheng , Xu Wenjian , Zeng Guoliang , Liu Pingping , Wu Yangjie
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Direct Addition of Supercritical Alcohols, Acetone or Acetonitrile to the Alkenes Without Catalysts.
Authors: Kamitanaka Takashi , Hikida Tatsuyoshi , Hayashi Satoshi , Kishida Nobuhiro , Matsuda Tomoko , Harada Tadao
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Efficient Carbonylation Reactions in Phosphonium Salt Ionic Liquids: Anionic Effects.
Authors: McNulty James , Nair Jerald J. , Robertson Al
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Efficient Microwave‐Accelerated Preparation of β‐Ketoimines.
Authors: Lee Dong Hwan , Park Sang‐Eon , Cho Kyuho , Kim Younsoo , Athar Taimur , Lee Ik‐Mo
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: One‐Pot Synthesis of β‐Amino Acid Derivatives via Addition of Bis(O‐Silyl) Ketene Acetals on Iminium Salts.
Authors: Moumne Roba , Denise Bernard , Parlier Andree , Lavielle Solange , Rudler Henri , Karoyan Philippe
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Dzhemilev Reaction for the Synthesis of Spiro[3.3]heptane and Spiro[3.4]octanes.
Authors: D'yakonov Vladimir A. , Finkelshtein Evgeniy Sh. , Ibragimov Askhat G.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Efficient Soluble Polymer‐Supported Tartrate/Ti Catalyst for Asymmetric Oxidation of Prochiral Sulfides.
Authors: Gao Jinshan , Guo Hongchao , Liu Shangzhong , Wang Min
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: In situ Generation of Palladium Nanoparticles: A Simple and Highly Active Protocol for Oxygen‐Promoted Ligand‐Free Suzuki Coupling Reaction of Aryl Chlorides.
Authors: Han Wei , Liu Chun , Jin Zi‐Lin
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Tandem Ring Opening and Oximation of Ethyl 3‐Aroyl‐1‐cyano‐4‐hydroxy‐2,4,6‐triarylcyclohexanecarboxylate by Hydroxylamine.
Authors: Saravanan Sivaperuman , Babu Heeralal Vignesh , Muthusubramanian Shanmugam
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Highly Efficient Organic Sensitizer for Dye‐Sensitized Solar Cells
Authors: Park Nam‐Gyu , et al. et al.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Ytterbium Triflate‐Assisted Catalytic Oxidative Cross‐Coupling of 2‐Naphthol Derivatives.
Authors: Habaue Shigeki , Temma Tomohisa , Sugiyama Yukihiro , Yan Pei
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Convenient Route to Prepare Isodicyclopentadiene—Precursor of 1,5‐Dihydro‐pentalene.
Authors: Burgos O F. , Chavez I. , Manriquez J. M. , Algeria S.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Syntheses and Anticholinesterase Activities of Novel 3‐Aminocarbonylmethylene‐3‐methyl‐2,3‐dihydrobenzofuran‐5‐yl Carbamates.
Authors: Luo Weiming , Yu Qian‐sheng , Holloway Harold W. , Tweedie David , Parrish Damon , Brossi Arnold , Greig Nigel H.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: New Approach to 4‐ and 5‐Aminopyrazole Derivatives.
Authors: Hassaneen Huwaida M. E.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium Catalyzed Synthesis of 4‐Substituted‐2‐phenylimidazoles from N‐Propargyl‐benzamidine.
Authors: Abbiati Giorgio , Arcadi Antonio , Canevari Valentina , Rossi Elisabetta
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthesis of 2‐Substituted Benzimidazoles by Iodine‐Mediated Condensation of Orthoesters with 1,2‐Phenylenediamines.
Authors: Zhang Zhan‐Hui , Li Jian‐Jiong , Gao Yuan‐Zhe , Liu Yu‐Heng
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Novel Method for the Synthesis of Highly Functionalized 3,4‐Dihydropyrimidin‐2(1H)‐ones Through the 1,4‐Addition on Pyrimidin‐2(1H)‐ones.
Authors: Shanmugam P. , Boobalan P. , Perumal P. T.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Design and Synthesis of a Functionally Selective D3 Agonist and Its in vivo Delivery via the Intranasal Route.
Authors: Blagg Julian , et al. et al.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Retro‐Ene Reactions in Heterocyclic Synthesis. Part 5. A Novel Synthetic Method for 1,3,5‐Triazine‐2,4(1H,3H)‐diones.
Authors: Ito Kunio , Sekiguchi Chiharu , Miida Asuka Wakai Hiroyuki , Ihara Shogo
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Aminocarbonylation Route to Tolvaptan.
Authors: Torisawa Yasuhiro , Furuta Takuya , Nishi Takao , Aki Shinji , Minamikawa Jun‐ichi
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electrophilic Tellurolactonization of 1,2‐Allenic Phosphonates: A Facile and Efficient Synthesis of 4‐(Phenyltelluro)‐1,2‐oxaphosphol‐3‐ene 2‐Oxides.
Authors: Yuan Jingqi , Ruan Xiuxiu , Yang Yewei , Huang Xian
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Total Synthesis of the Novel seco‐Prezizaane Sesquiterpenoid (+)‐1S‐Minwanenone (I).
Authors: Methta Goverdhan , Shinde Harish M.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Three New Lanostane Triterpenoids from Inonotus obliquus
Authors: Taji Sayaka , Yamada Takeshi , In Yasuko , Wada Shun‐ichi , Usami Yoshihide , Sakuma Kazuo , Tanaka Reiko
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Diastereoselective Preparation of anti‐α,β‐Dialkyl β‐Amino Acids Containing Natural α‐Amino Acid Side Chains.
Authors: Capone Stefania , Pedatella Silvana , Guaragna Annalisa , De Nisco Mauro , Palumbo Giovanni
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Enantioselective Synthesis of (‐)‐Barrenazines A and B.
Authors: Martinez M. Montserrat , Sarandeses Luis A. , Sestelo Jose Perez
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Structures and Properties of One‐Dimensional Transition Metal Containing Coordination/Organometallic Polymers and Oligomers Built Upon Assembling Diphosphine and Diisocyanide Ligands
Authors: Harvey Pierre D.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Intramolecular 1,3‐Dipolar Cycloaddition Reactions in Targeted Syntheses.
Authors: Nair Vijay , Suja T. D.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Synthesis of Novel Apio Carbocyclic Nucleoside Analogues as Potential Antiviral and Antitumor Agent
Authors: Jeong Lak Shin , Lee Jeong A. , Moon Hyung Ryong , Kim Hea Ok , Lee Kang Man , Lee Hyun Joo , Chun Moon Woo
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Stereoselective Synthesis of Homo‐Apioneplanocin A as Potential Inhibitor of S‐Adenosylhomocysteine Hydrolase
Authors: Chun Moon Woo , Lee Hyuk Woo , Kim Jin‐Hee , Kim Hea Ok , Lee Kang Man , Pal Shantanu , Moon Hyung Ryong , Jeong Lak Shin
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: An Alternative Synthetic Method for 4′‐C‐Ethynylstavudine by Means of Nucleophilic Substitution of 4′‐Benzoyloxythymine Nucleoside
Authors: Haraguchi Kazuhiro , Sumino Masanori , Tanaka Hiromichi
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Different Strategies for the Synthesis of 2′‐O‐Aminoethyl Adenosine Building Blocks
Authors: Odadzic Dalibor , Engels Joachim W.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Asymmetric Synthesis of Apio Fluoroneplanocin A Analogues as Potential AdoHcy Hydrolase Inhibitor
Authors: Park Ah‐Young , Moon Hyung Ryong , Kim Kyung Ran , Kang Jin‐Ah , Chun Moon Woo , Jeong Lak Shin
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Physicochemical Methods for Enhancing Oil Recovery from Oil Fields
Authors: Altunina L. K. , Kuvshinov V. A.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: The Application of 19F Nuclear Magnetic Resonance to Investigate Microbial Biotransformations of Organofluorine Compounds
Authors: Murphy Cormac D.
Published: February 2008

ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Biofiltration of Pyridine by Shewanella putrefaciens in a Corn‐Cob Packed Biotrickling Filter
Authors: Mathur Anil Kumar , Majumder C. B.
Published: February 2008

In this study, a new strain of microorganism Shewanella putrefaciens was used for biofiltration of a pyridine laden air stream in a corn‐cob packed biotrickling filter. In the biotrickling filter tested with S. putrefaciens, the maximum removal of pyridine is determined to be 100% at less than the average inlet concentration of 0.653 g m–3 and more than 93% at a higher average inlet concentration of 1.748 g m–3 (phase VIII) with an empty bed residence time (EBRT) of 106 s. However, when the biotrickling filter was operated at a low EBRT of 53 s and almost the same average inlet concentration of 1.752 g m–3 (phase VII), the removal level attained was not greater than 85%. The maximum elimination capacity (EC) of the biotrickling filter was 102.34 g m–3h–1 at an inlet pyridine load of 119.62 g m–3h–1 with an EBRT of 53 s in phase VII. The maximum deviation of the EC from the 100% conversion line varied from 0.257 to 10.166% when going from phase I to VIII. Kinetic analysis showed that the maximum removal rate, rmax, and saturation constant, Ks, values for pyridine were calculated as 0.24 g m–3h–1 and 6.44 g m–3, respectively, with a correlation coefficient, R2, of 0.9939 and a standard deviation of error of 23.94%. The information contained herein indicates that the corn‐cob packed biotrickling filter inoculated by S. putrefaciens should provide excellent performance in the removal of gaseous pyridine.
Distinct behaviors of neural stem and progenitor cells underlie cortical neurogenesis
Authors: Noctor Stephen C. , Martínez‐Cerdeño Verónica , Kriegstein Arnold R.
Published: February 2008

Neocortical precursor cells undergo symmetric and asymmetric divisions while producing large numbers of diverse cortical cell types. In Drosophila, cleavage plane orientation dictates the inheritance of fate‐determinants and the symmetry of newborn daughter cells during neuroblast cell divisions. One model for predicting daughter cell fate in the mammalian neocortex is also based on cleavage plane orientation. Precursor cell divisions with a cleavage plane orientation that is perpendicular with respect to the ventricular surface (vertical) are predicted to be symmetric, while divisions with a cleavage plane orientation that is parallel to the surface (horizontal) are predicted to be asymmetric neurogenic divisions. However, analysis of cleavage plane orientation at the ventricle suggests that the number of predicted neurogenic divisions might be insufficient to produce large amounts of cortical neurons. To understand factors that correlate with the symmetry of cell divisions, we examined rat neocortical precursor cells in situ through real‐time imaging, marker analysis, and electrophysiological recordings. We find that cleavage plane orientation is more closely associated with precursor cell type than with daughter cell fate, as commonly thought. Radial glia cells in the VZ primarily divide with a vertical orientation throughout cortical development and undergo symmetric or asymmetric self‐renewing divisions depending on the stage of development. In contrast, most intermediate progenitor cells divide in the subventricular zone with a horizontal orientation and produce symmetric daughter cells. We propose a model for predicting daughter cell fate that considers precursor cell type, stage of development, and the planar segregation of fate determinants. J. Comp. Neurol. 508:28–44, 2008. © 2008 Wiley‐Liss, Inc.
Organic Carbonates as Alternative Solvents for Palladium‐Catalyzed Substitution Reactions
Authors: Schäffner Benjamin , Holz Jens , Verevkin Sergey P. , Börner Armin
Published: February 2008

Organic carbonates, such as propylene carbonate, butylene carbonate, and diethyl carbonate, were tested in the Pd‐catalyzed asymmetric allylic substitution reactions of rac‐1,3‐diphenyl‐3‐acetoxy‐prop‐1‐ene with dimethyl malonate or benzylamine as nucleophiles. Bidentate diphosphanes were used as chiral ligands. The application of monodentate phosphanes capable of self‐assembling with the metal was likewise tested. In the substitution reaction with dimethyl malonate, enantioselectivities up to 98 % were achieved. In the amination reaction, the chiral product was obtained with up to 83 % ee. The results confirm that these “green solvents” can be advantageously used for this catalytic transformation as an alternative to those solvents usually employed which run some risk of being harmful to the environment.
The Preparation and CVD Densification of Multi‐walled Carbon Nanotube Felt Synthesized by a Catalytic CVD Method
Authors: Li X. , Yuan G. , Westwood A. , Zhang H. , Dong Z. , Brown A. , Brydson R. , Rand B.
Published: February 2008

Silica‐nickel binary aerogels are used as catalysts for the synthesis of multi‐walled carbon nanotube (MWCNT) felts. The MWCNT felts are prepared by the catalytic decomposition of methane at 680 °C over durations ranging from 30 to 120 min. After purification by a graphitization heat‐treatment in argon, the MWCNT felts have a bulk density of about 0.4 g cm–3. The graphitized MWCNT felts are densified in a CVD furnace under a mixed atmosphere of propene and nitrogen at 1000 °C. The morphology and the structure of the MWCNT felt and its CVD‐densified product are investigated by SEM, TEM, XRD, and Raman spectroscopy. The results reveal that the carbon nanotubes in the primary MWCNT felt have a diameter of between 15 and 40 nm, with a high aspect ratio. High‐resolution TEM imaging reveals that the walls of the carbon nanotubes show little amorphous carbon covering. After the graphitization treatment, the surface of the carbon nanotubes becomes rough and some “stacked cups” and triangular structures are formed in the core of some of the nanotubes. The graphitization treatment effectively promotes crystal growth and layer orientation of the carbon nanotubes. This high temperature‐treated MWCNT felt has a high purity and a low bulk density, as well as low thermal conductivity. Pyrolytic carbon formed by CVD is deposited in between carbon nanotubes and on the walls of the carbon nanotubes, leading to the densification of the MWCNT felt. The CVD‐densified MWCNT felt has a higher bulk density and thermal conductivity than that of the corresponding high temperature‐treated MWCNT felt. It is suggested that the MWCNT felt could be used as a precursor in the production of carbon nanotube/carbon or carbon nanotube/polymer composites.
Controlled Nanostructured Silver Coated Surfaces by Atmospheric Pressure Chemical Vapour Deposition
Authors: Sheel D. W. , Brook L. A. , Yates H. M.
Published: February 2008

Thin film silver has been widely reported for its interesting properties. In this paper we describe a route to produce controlled nanostructured silver layers. A combination of Flame Assisted Chemical Vapour Deposition at atmospheric pressure, with low cost and a low toxicity silver precursor, was used to generate coatings of structured silver surfaces on glass. This approach gives a high degree of control of surface structure, density and topography.

These layers have potential applications in areas such as catalysis, photo‐activity and for biocidal surfaces. Our results indicate very high biocidal activity where the nano‐structure is proposed as playing a significant role.
Heteroepitaxial YAlO3 Films on (100)SrTiO3 Substrates: The Use of Pole Figures as a Non‐invasive Tool to Assess the Direction of Growth
Authors: Malandrino G. , Grigoli G. , Fragalà I. L.
Published: February 2008

YAlO3 films are grown on (100)SrTiO3 substrates through an in‐situ novel metal‐organic (MO)CVD strategy involving a molten source consisting of the second‐generation Y(hfa)3·diglyme (Hhfa = 1,1,1,5,5,5‐hexafluoro‐2,4‐pentanedione, diglyme = bis(2‐methoxyethyl)ether) precursor which acts as a solvent for the Al(acac)3 (Hacac = acetylacetone). The X‐ray diffraction (XRD) patterns show that the films are crystalline and highly oriented, while compositional analysis indicates that the films possess the correct 1:1 ratio. Pole figures are applied as a simple, economic, non‐invasive tool to assess the growth direction of YAlO3 films.
The Role of Isomeric Effects on the Luminescence Lifetimes and Electrochemistry of Oligothienyl‐Bridged Dinuclear Tris(2,2′‐bipyridine)ruthenium(II) Complexes
Authors: Steen Robert O. , Nurkkala Lasse J. , Angus‐Dunne Sarah J. , Schmitt Chantal X. , Constable Edwin C. , Riley Mark J. , Bernhardt Paul V. , Dunne Simon J.
Published: February 2008

The luminescence lifetimes (in CH3CN at room temperature) and electrochemical potentials (in CH3CN) of a range of mono‐ and bis(bidentate) 2,2′‐bipyridine‐capped oligothiophene‐bridged RuII complexes based on the 6‐(2‐thienyl)‐2,2′‐bipyridine and 4‐(2‐thienyl)‐2,2′‐bipyridine motifs have been measured. The redox potentials occurred in a very narrow range and showed only small shifts from that of [Ru(bpy)3]2+, which indicates that the inductive effects of the substituents on the 2,2′‐bipyridine ligands are very similar across this series. In the complexes that incorporated a bithiophene moiety the oxidation of the bithienyl group occurred at higher potentials than the metal‐centered RuIII/II oxidation. No or very weak interaction between the metal cores in the dinuclear complexes was observed. It was found that the luminescence lifetimes of the complexes where the attachment point of the oligothiophene bridge is in the 4‐position of a 2,2′‐bipyridine ligand were extended compared to [Ru(bpy)3]2+, whereas the luminescence was very short‐lived (<30 ns) or completely quenched in the complexes where the oligothiophene bridge was attached in the 6‐position. The difference in lifetimes is probably due to steric interactions between the thienyl bridge and the auxiliary bipyridyl ligands, resulting in disturbances in coordination symmetry of the metal core. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)