bluuebunny/crossref_metadata_2025_split huggingface dataset:
Application of chitosan solutions gelled by melB tyrosinase to water‐resistant adhesives
Authors: Yamada Kazunori , Aoki Toshihiro , Ikeda Naoya , Hirata Mitsuo , Hata Yoji , Higashida Katsuya , Nakamura Yukihiro 
Published: November 2007

AbstractAn investigation was undertaken on the application of dilute chitosan solutions gelled by melB tyrosinase‐catalyzed reaction with 3,4‐dihydroxyphenethylamine (dopamine). The tyrosinase‐catalyzed reaction with dopamine conferred water‐resistant adhesive properties to the semi‐dilute chitosan solutions. The viscosity of the chitosan solutions highly increased by the tyrosinase‐catalyzed quinone conversion and the subsequent nonenzymatic reactions of o‐quinones with amino groups of the chitosan chains. The viscosity of chitosan solutions highly increased in shorter reaction times by addition of melB tyrosinase. Therefore, in this study, the gelation of a chitosan solution was carried out without poly(ethylene glycol) (PEG), which was added for the gelation of chitosan solutions using mushroom tyrosinase. The highly viscous, gel‐like modified chitosan materials were allowed to spread onto the surfaces of the glass slides, which were tightly lapped together and were held under water. Tensile shear adhesive strength of over 400 kPa was observed for the modified chitosan samples. An increase in either amino group concentration of the chitosan solutions or molecular mass of the chitosan samples used effectively led to an increase in adhesive strength of the glass slides. Adhesive strength obtained by chitosan materials gelled enzymatically was higher than that obtained by a chitosan gel prepared with glutaraldehyde as a chemical crosslinking agent. In addition, the use of melB tyrosinase led to a sharp increase in adhesive strength in shorter reaction times without other additives such as PEG. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Low‐potential electrochemical polymerization of 6‐nitroindole and characterization of its polymers
Authors: Le Zhanggao , Zeng Liqiang , Xu Jingkun , Liu Houting , Ma Mulin 
Published: November 2007

AbstractConducting polymers bearing nitro substituents are very important from both academic and industrial viewpoints. However, it is very difficult to electrosynthesize such conducting polymers because of the strong electron‐withdrawing effect of nitro groups. In this article, we describe the electrochemical synthesis of films of a new conducting polymer, high‐quality poly(6‐nitroindole) (P6NI), by direct anodic oxidation of 6‐nitroindole in boron trifluoride diethyl etherate containing 10% (v/v) diethyl ether. The oxidation potential onset of 6‐nitroindole in this medium has been measured to be just 0.98 V versus a saturated calomel electrode (SCE), which is much lower than that determined in acetonitrile containing 0.1 mol/L tetrabutylammonium tetrafluoroborate (1.6 V vs SCE). Thermal studies have revealed that P6NI displays good thermal stability. The electrical conductivity of the P6NI films has been measured to be 0.08 S/cm. Structural studies have shown that the polymerization of the 6‐nitroindole ring occurs mainly at the 2,3‐positions. Fluorescence spectral studies have shown that the principal excitation and emission peaks of P6NI are at 416 and 535 nm, respectively, with a fluorescence quantum yield of 0.05. All these properties of P6NI films may facilitate their potential applications in various fields, such as electrochemical sensors and green‐light‐emitting materials. To the best of our knowledge, this is the first report on the electrosynthesis and characterization of 6‐nitro‐substituted polyindole films. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008
Total Synthesis of (+)‐Yatakemycin
Authors: Okano Kentaro , Tokuyama Hidetoshi , Fukuyama Tohru 
Published: November 2007

AbstractA convergent total synthesis of (+)‐yatakemycin was accomplished by a 20‐step sequence in 13 % overall yield. The regioselective ring opening of (S)‐epichlorohydrin with a 2,6‐dibromophenyllithium derivative enabled us to introduce a chiral carbon center, which was required for the stereoselective construction of the cyclopropane ring. The five aryl–nitrogen bonds in (+)‐yatakemycin were constructed by a mild copper‐mediated aryl amination that utilized the combination of CuI with CsOAc. The efficient and chemoselective debenzylation of aryl benzyl ether with BCl3 in the presence of pentamethylbenzene was developed. With these new methodologies, the subgram‐scale synthesis of (+)‐yatakemycin was achieved.
The estimation of the Barndorff‐Nielsen and Shephard model from daily data based on measures of trading intensity
Authors: Lindberg Carl 
Published: November 2007

AbstractWe give a method to fit the Barndorff‐Nielsen and Shephard model [J. R. Stat. Soc. Ser. B 2001; 63:167–241] to daily data. Many researchers have established a connection between volatility and different measures of trading intensity, such as traded volume or number of trades. We benefit from this connection, and propose to use some measure of trading intensity as the volatility in the model in [J. R. Stat. Soc. Ser. B 2001; 63:167–241]. Our approach gives stable parameter estimates, and it is much easier to implement than the quadratic variation method. The efficiency of our method is illustrated by a statistical analysis on the Ericsson stock from the OMX Stockholmsbörsen during an exceptionally turbulent period of five years. The results indicate a good model fit. Copyright © 2007 John Wiley & Sons, Ltd.
Glycodynamers: Dynamic analogs of arabinofuranoside oligosaccharides
Authors: Ruff Yves , Lehn Jean‐Marie 
Published: November 2007

AbstractDynamic analogs of α‐(1→5)‐D‐oligoarabinofuranosides were prepared by oxime polycondensation. These equilibrium polymers were characterized by 1H NMR studies, NMR DOSY, and MALDI mass spectrometry. Their reversibility under mild acidic conditions was demonstrated by component exchange reaction followed by 1H NMR studies. Their size and composition can be tuned by component exchange emphasizing their constitutionally dynamic character. They represent dynamic versions of biopolymers, biodynamers. © 2007 Wiley Periodicals, Inc. Biopolymers 89: 486–496, 2008.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
From helix–coil transitions to protein folding
Authors: Scheraga Harold A. 
Published: November 2007

AbstractAn evolution of procedures to simulate protein structure and folding pathways is described. From an initial focus on the helix–coil transition and on hydrogen‐bonding and hydrophobic interactions, our original attempts to determine protein structure and folding pathways were based on an experimental approach. Experiments on the oxidative folding of reduced bovine pancreatic ribonuclease A (RNase A) led to a mechanism by which the molecule folded to the native structure by a minimum of four different pathways. The experiments with RNase A were followed by development of a molecular mechanics approach, first, making use of global optimization procedures and then with molecular dynamics (MD), evolving from an all‐atom to a united‐residue model. This hierarchical MD approach facilitated probing of the folding trajectory to longer time scales than with all‐atom MD, and hence led to the determination of complete folding trajectories, thus far for a protein containing as many as 75 amino acid residues. With increasing refinement of the computational procedures, the computed results are coming closer to experimental observations, providing an understanding as to how physics directs the folding process. © 2007 Wiley Periodicals, Inc. Biopolymers 89: 479–485, 2008.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
Characterization of the structure and dynamics of mastoparan‐X during folding in aqueous TFE by CD and NMR spectroscopy
Authors: Crandall Yvette M. , Bruch Martha D. 
Published: November 2007

AbstractMastoparan‐X, a 14‐residue peptide found in wasp venom, does not adopt a well‐defined structure in water, but it folds into an α‐helix upon addition of trifluoroethanol (TFE). At low levels of TFE, the peptide is partially folded, passing through intermediate stages of folding as the amount of TFE is increased. These partially folded states have been characterized by CD and NMR spectroscopy, and methods to estimate the helical content from CD, chemical shift, and nuclear overhauser effect (NOE) data are compared. Variation in the sign and intensity of NOE cross‐peaks is observed in different regions of the peptide, indicative of greater mobility of the sidechains compared to the backbone of the peptide. Furthermore, variation in the sidechain mobility is observed, both between sidechains of different amino acids and within the sidechain of a given amino acid. By monitoring chemical shifts and NOE intensities as the TFE concentration is increased, the initiation site for helix formation could be identified. Furthermore, details of the peptide structure and dynamics during the folding process were elucidated. © 2007 Wiley Periodicals, Inc. Biopolymers 89: 197–209, 2008.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
Influences on the Regioselectivity of Palladium‐Catalyzed Allylic Alkylations
Authors: Kazmaier Uli , Stolz Daniel , Krämer Katja , Zumpe Franz L. 
Published: November 2007

AbstractChelated amino acid ester enolates are excellent nucleophiles for palladium‐catalyzed allylic alkylations. These enolates react rapidly at −78 °C and in general without isomerization of π‐allyl palladium complexes. Therefore, they are good candidates for mechanistic studies and regioselective reactions. Terminal π‐allyl palladium complexes are preferentially attacked at the least hindered position giving rise to linear products, as illustrated with several (E)‐configured allylic substrates. Under isomerization free conditions the branched products are formed preferentially from the corresponding (Z)‐allyl substrates. An interesting behavior is observed in the reaction of secondary allylic substrates. Aryl‐substituted substrates show a significant memory effect which can be explained by an asymmetric π‐allyl complex. For alkyl‐substituted substrates a strong dependence of the regioselectivity on the leaving group is observed, which can be explained by different conformations in the ionization step. Under isomerization free conditions the product ratio gives important information about this step.
Cation Substitution in Defect Thiospinels: Structural and Magnetic Properties of GaV4‐xMoxS8 (0 ≤ x ≤ 4).
Authors: Powell Anthony V. , McDowall Andrew , Szkoda Iwona , Knight Kevin S. , Kennedy Brendan J. , Vogt Thomas 
Published: November 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.
Structures and Phase Diagram for the System CaTiO3—La2/3TiO3.
Authors: Zhang Zhaoming , Lumpkin Gregory R. , Howard Christopher J. , Knight Kevin S. , Whittle Karl R. , Osaka Keiichi 
Published: November 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.
Visible‐Light Photocatalytic Properties of Weak Magnetic BiFeO3 Nanoparticles.
Authors: Gao Feng , Chen Xinyi , Yin Kuibo , Dong Shuai , Ren Zhifeng , Yuan Fang , Yu Tao , Zou Zhigang , Liu Jun‐Ming 
Published: November 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.
Preparation of Monodispersed Nanoparticles by Electrostatic Assembly of Keggin‐Type Polyoxometalates and 1,4,7‐Triazacyclononane‐Based Transition‐Metal Complexes.
Authors: Uchida Sayaka , Hikichi Shiro , Akatsuka Takeo , Tanaka Toshiyuki , Kawamoto Ryosuke , Lesbani Aldes , Nakagawa Yoshinao , Uehara Kazuhiro , Mizuno Noritaka 
Published: November 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.
Pd(SeO3), Pd(SeO4), and Pd(Se2O5): The First Palladium Oxoselenates.
Authors: Arndt Annika , Wickleder Mathias S. 
Published: November 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 Reductive Mannich Coupling of Vinyl Ketones to N‐Sulfonylimines Mediated by Hydrogen.
Authors: Garner Susan A. , Krische Michael J. 
Published: November 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 Reactivity of Epoxides with Lithium 2,2,6,6‐Tetramethylpiperidide in Combination with Organolithiums or Grignard Reagents.
Authors: Hodgson David M. , Fleming Matthew J. , Stanway Steven J. 
Published: November 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.
Indium(III) Trifluoromethanesulfonate as an Efficient Catalyst for the Deprotection of Acetals and Ketals.
Authors: Gregg Brian T. , Golden Kathryn C. , Quinn John F. 
Published: November 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.
1,3‐Alternate Calix[4]arene Nitronyl Nitroxide Tetraradical and Diradical: Synthesis, X‐Ray Crystallography, Paramagnetic NMR Spectroscopy, EPR Spectroscopy, and Magnetic Studies.
Authors: Rajca Andrzej , Pink Maren , Mukherjee Sumit , Rajca Suchada , Das Kausik 
Published: November 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.
From Simple Rings to One‐Dimensional Channels with Calix[8]arenes, Water Clusters, and Alkali Metal Ions.
Authors: Bergougnant Remi D. , Robin Adeline Y. , Fromm Katharina M. 
Published: November 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.
Ratiometry of Monomer/Excimer Emissions of Dipyrenyl Calix[4]arene in Aqueous Media.
Authors: Kim Hyun Jung , Quang Duong Tuan , Hong Jooyeon , Kang Guipeun , Ham Sihyun , Kim Jong Seung 
Published: November 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.
Bistrimethylsilylpropargylic Ether: A Versatile Ambident Synthon to Access Substituted Allenyne Ethers and α‐Substituted Bispropargylic Alcohols.
Authors: Brossat Maude , Heck Marie‐Pierre , Mioskowski Charles 
Published: November 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.
Organocatalytic Sequential One‐Pot Double Cascade Asymmetric Synthesis of Wieland—Miescher Ketone Analogues from a Knoevenagel/Hydrogenation/Robinson Annulation Sequence: Scope and Applications of Organocatalytic Biomimetic Reductions.
Authors: Ramachary Dhevalapally B. , Kishor Mamillapalli 
Published: November 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.
Asymmetric Synthesis of 3‐Amino‐2‐hydroxyalkanoates by Mannich Reaction of Menthyl Acetate with Imines and Subsequent Oxidation.
Authors: Hata Seiji , Tomioka Kiyoshi 
Published: November 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 One‐Pot Synthesis of Unsymmetrical Ethers: A Directly Reductive Deoxygenation of Esters Using an InBr3/Et3SiH Catalytic System.
Authors: Sakai Norio , Moriya Toshimitsu , Konakahara Takeo 
Published: November 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.
Redox‐Neutral Synthesis of β‐Amino Aldehydes from Imines by an Alkynylation/Hydration Sequence.
Authors: Labonne Aurelie , Zani Lorenzo , Hintermann Lukas , Bolm Carsten 
Published: November 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.
One‐Pot Amidation of Olefins Through Pd‐Catalyzed Coupling of Alkylboranes and Carbamoyl Chlorides.
Authors: Yasui Yoshizumi , Tsuchida Sayo , Miyabe Hideto , Takemoto Yoshiji 
Published: November 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.
Solvent‐Free Cyanosilylation of Carbonyl Compounds Catalyzed by NbCl5.
Authors: George Soney C. , Kim Sung Soo 
Published: November 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 Cyanosilylation of Aldehydes Catalyzed by Mn(salen) Complex/Triphenyl Phosphine Oxide.
Authors: Kim Sung Soo , Kwak Ju Myung , George Soney C. 
Published: November 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.
Chlorotrimethylsilane—Nitrate Salts as Oxidants: Direct Oxidative Conversion of Thiols and Disulfides to Sulfonyl Chlorides.
Authors: Prakash G. K. Surya , Mathew Thomas , Panja Chiradeep , Olah George A. 
Published: November 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.
Catalytic Conversion of Isocyanates to Carbodiimides by Cyclopentadienyl Manganese Tricarbonyl and Cyclopentadienyl Iron Dicarbonyl Dimer.
Authors: Rahman A. K. Fazlur , Nicholas Kenneth M. 
Published: November 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 Tethered Aziridination of Unsaturated N‐Tosyloxy Carbamates.
Authors: Liu Renmao , Herron Steven R. , Fleming Steven A. 
Published: November 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 4‐Iodo‐3‐furanones Utilizing Electrophile‐Induced Tandem Cyclization/1,2‐Migration Reactions.
Authors: Crone Benedikt , Kirsch Stefan F. 
Published: November 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 Lactone Formation by Using Hypervalent Iodine(III) Reagents with KBr via Selective C—H Abstraction Protocol.
Authors: Dohi Toshifumi , Takenaga Naoko , Goto Akihiro , Maruyama Akinobu , Kita Yasuyuki 
Published: November 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.
Cation‐Exchange Resin as Efficient, Cost‐Effective and Recyclable Catalyst for the Synthesis of 3‐Propargylindoles.
Authors: Yadav J. S. , Reddy B. V. Subba , Kumar G. G. K. S. Narayana , Rao K. V. Raghavendra 
Published: November 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 Sulfur‐Substituted Quinolizidines and Pyrido[1,2‐a]azepines by Ring‐Closing Metathesis.
Authors: Chou Shang‐Shing P. , Liang Chu‐Fang , Lee Tse‐Ming , Liu Chih‐Fen 
Published: November 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.
Polysubstituted 2,3‐Dihydrofuro[2,3‐b]pyridines and 3,4‐Dihydro‐2H‐pyrano[2,3‐b]pyridines via Microwave‐Activated Inverse Electron Demand Diels—Alder Reactions.
Authors: Hajbi Youssef , Suzenet Franck , Khouili Mostafa , Lazar Said , Guillaumet Gerald 
Published: November 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 Diastereomeric 2,4‐Disubstituted Pyrano[2,3‐b]quinolines from 3‐Formyl‐2‐quinolones Through O—C Bond Formation via Intramolecular Electrophilic Cyclization.
Authors: Singh Mrityunjay K. , Chandra Atish , Singh Bhawana , Singh Radhey M. 
Published: November 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 Homochiral 2‐(2‐Arylethyl)piperazines.
Authors: Schaus John M. , Krushinski Joseph H. , Ruley Kevin M. , Rocco Vincent P. 
Published: November 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.
Michael Addition of Amine Derivatives to Conjugate Phosphinyl and Phosphonyl Nitrosoalkenes. Preparation of α‐Amino Phosphine Oxide and Phosphonate Derivatives.
Authors: de los Santos Jesus M. , Ignacio Roberto , Aparicio Domitila , Palacios Francisco 
Published: November 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 Enantiospecific Synthesis of (+)‐Demethoxyerythratidinone from (S)‐Malic Acid: Key Observations Concerning the Diastereocontrol in Malic Acid Derived N‐Acyliminium Ion Cyclizations.
Authors: Zhang Fengzhi , Simpkins Nigel S. , Wilson Claire 
Published: November 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.