bluuebunny/crossref_metadata_2025_split huggingface dataset:
Theoretical confirmation ofin situmonitoring of monomer conversion during acrylamide polymerization via pyranine flouroprobe
Authors: Kızıldereli Nihan , Gelir Ali , Güney Orhan , Yılmaz Yaşar 
Published: October 2009

AbstractIn this study, a new approach forin situmonitoring of the monomer conversion based on the chemical interaction of a fluoroprobe, pyranine (8‐hydroxypyrene‐1,3,6‐trisulfonic acid, trisodium salt), with polymer chains during the free radical crosslinking copolymerization of acrylamide/bisacrylamide system (AAm/Bis) has been developed. Recently, we have shown that the pyranine fluoroprobes added to the prepolymerization solution in trace amounts bind covalently to the vinyl groups of the growing polymer chains via OH group by radical addition when the free radical polymerization of acrylamide (AAm) is initiated. This covalent binding results in a considerable blue shift in the emission spectrum of the pyranine, from 515 to ∼ 420 nm. In this study 0.5, 0.7, and 1.0 mol L−1linear and crosslinked polymers including trace amounts of pyranine were synthesized. The change in the emission spectra of pyranine during polymerization and gelation were monitored as function of time. Here, we showed that both by theoretically and by comparing the fluorescence data with gravimetric measurements, the fluorescence intensity of pyranine monitored during the polymerization process can be used forin situmonitoring of the monomer conversion with great sensitivity. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Properties of rigid polyurethane‐polyisocyanurate foams modified with the selected fillers
Authors: Czupryński Bogusław , Paciorek‐Sadowska Joanna , Liszkowska Joanna 
Published: October 2009

AbstractRigid polyurethane‐polyisocyanurate foams (PUR‐PIR) containing from 2.5% to 20% w/w of fillers (talc, aluminum hydroxide, chalk, starch and borax) were the subject of our studies; a reference sample was PUR‐PIR foam with no filler added. Apparent density, compressive strength, brittleness, content of closed cells, retention (flammability) and softening point of foams were determined and the products were analyzed by thermogravimetric method. These parameters were the basis to determine effect of type and participation of the fillers studied on physicochemical, heat, and thermal properties of foams. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Novel catalysts based on titanium dioxide/silicon dioxide for poly(ethylene terephthalate)
Authors: Yin Ming , Li Chuncheng , Guan Guohu , Zhang Dong , Xiao Yaonan 
Published: October 2009

AbstractA series of titanium dioxide/silicon dioxide based poly(ethylene terephthalate) (PET) polycondensation catalysts were synthesized with different Si/Ti molar ratios and various amounts of polyvinylpyrrolidone (PVP). The composition, structure, and catalytic activities of the catalysts and the properties of the PET samples catalyzed by these catalysts were characterized with thermogravimetric analysis, electron probe microanalysis, X‐ray diffraction, X‐ray photoelectron spectroscopy, and so forth. The results indicated that the Si/Ti molar ratios of the catalysts could be well controlled by the synthesis processes used in this study, whereas the content of PVP was influenced by the amount of titanium dioxide. The activities of the catalysts greatly depended on the Si/Ti molar ratios and coordinative effects between titanium and PVP. Some of the catalysts possessed ultrahigh activities, and the corresponding PET material had excellent properties.© 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Ionization‐induced ultrarapid response behavior of fibrous and porous electrospun hydrogels containing carboxyl groups
Authors: Wang Huijun , Zheng Jun , Peng Mao 
Published: October 2009

AbstractFibrous porous membranes composed of poly(N‐isopropylacrylamide‐co‐acrylic acid) and poly(N‐isopropylacrylamide‐co‐hydroxyethyl methacrylate) were prepared by electrospinning. The membranes behaved like hydrogels in water after being crosslinked at elevated temperatures. Investigations of the swelling and deswelling behavior indicated that the response rates significantly increased after the carboxyl and/or anhydride groups in the hydrogel membranes were ionized or neutralized with NaOH. It took them less than 60 s to reach equilibrium swelling and about 90 s to reach equilibrium deswelling. The response rates were much higher than those of the parent un‐ionized membranes; this indicated that ionization played an important role in the ultrarapid response behavior. The response rate was also higher than that of most hydrogel materials previously reported and was even comparable to superporous hydrogels with high moisture contents. The mechanism of the ultrarapid response behavior of the ionized membranes was qualitatively analyzed. We believe that the fine fiber diameter, high porosity, and improved wettability with water contributed to the ultrarapid response behavior. This study presents a new and facile method for improving the response rate of hydrogel materials made by electrospinning. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Synthesis of amphiphilic pseudopolyamino acid‐containing ABC‐triblock copolymers and micellar characterizations
Authors: Lee Ren‐Shen , Li Hua‐Rong , Chiu Fang‐Chyou 
Published: October 2009

AbstractThis study describes the synthesis of amphiphilic ABC‐triblock copolymers comprising a central pseudopoly(4‐hydroxy‐L‐proline) segment and terminal hydrophilic poly(ethylene glycol)methyl ether as well as hydrophobic poly(ε‐caprolactone) blocks. Differential scanning calorimetry, 1H‐NMR spectroscopy, and gel permeation chromatography are used to characterize the copolymers. The thermal properties (Tg and Tms) of the triblock copolymers depend on the composition of polymers. Larger amounts of ε‐CL incorporated into the macromolecular backbone increased Tg and Tms. Fluorescence spectroscopy, transmission electron microscopy, and dynamic light scattering are utilized to investigate their micellar characteristics in the aqueous phase. Observations showed a higher critical micelle concentration with higher hydrophilic components in the copolymers. The micelle exhibited a core‐shell‐corona and/or vesicle shape, and the average size was less than 300 nm. Drug entrapment efficiency and drug loading of micelles depending on the composition of block polymers are also described. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Influence of electron beam radiation on mechanical and thermal properties of styrene‐butadiene‐styrene block copolymer
Authors: Datta Sanjoy , Singha Nikhil K. , Naskar Kinsuk , Bhardwaj Y.K. , Sabharwal Sunil 
Published: October 2009

AbstractElectron beam crosslinking of elastomers is a special type of crosslinking technique that has gained importance over conventional chemical crosslinking method, because the former process is fast, pollution free, and simple. The technique involves the impingement of high‐energy electrons generated from electron accelerators and the subsequent production of free radicals on target elastomers. These radicals result in crosslinking of elastomers via radical–radical coupling. In the process, some chain scission may also take place. In this work, a high‐vinyl (∼ 50%) styrene‐butadiene‐styrene (S‐B‐S) block copolymer was used as the base polymer. An attempt was made to see the effect of electron beam radiation on the mechanical and thermal properties of the block copolymer. Radiation doses were varied from 25 to 300 kGy. Mechanical properties like tensile strength, elongation at break, modulus at different elongations, hardness, tear strength, crosslink density, and crosslink to chain scission of the irradiated samples were studied and compared with those of unirradiated ones. In this S‐B‐S block copolymer, a relatively low‐radiation dose was found effective in improving the level of mechanical properties. Differential scanning calorimeter and dynamic mechanical analyzer were used to study the thermal characteristics of the irradiated polymer. Influence of a stabilizer at different concentrations on the properties of S‐B‐S at varied radiation doses were also focused on. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Post‐financial meltdown: What do the services industries need from us now?
Authors: Hoerl Roger W. , Snee Ronald D. 
Published: October 2009

AbstractIn 2008 the global economy was rocked by a crisis that began on Wall Street, but quickly spread to Main Street U.S.A., and then to side streets around the world. Statisticians working in the service sector are not immune, with many concerned about losing their jobs. Given this dramatic course of events, how should statisticians respond? What, if anything, can we do to help our struggling organizations survive this recession, in order to prosper in the future? This expository article describes some approaches that we feel can help service industries deal with aftereffects of the financial meltdown. Based on an understanding of current needs of the service industries, we emphasize three approaches in particular: a greater emphasis on statistical engineering relative to statistical science, ‘embedding’ statistical methods and principles into key business processes, and the reinvigoration of Lean Six Sigma to drive immediate, tangible business results. Copyright © 2009 John Wiley & Sons, Ltd.
A model for radiofrequency electromagnetic field predictions at outdoor and indoor locations in the context of epidemiological research
Authors: Bürgi Alfred , Frei Patrizia , Theis Gaston , Mohler Evelyn , Braun‐Fahrländer Charlotte , Fröhlich Jürg , Neubauer Georg , Egger Matthias , Röösli Martin 
Published: October 2009

AbstractWe present a geospatial model to predict the radiofrequency electromagnetic field from fixed site transmitters for use in epidemiological exposure assessment. The proposed model extends an existing model toward the prediction of indoor exposure, that is, at the homes of potential study participants. The model is based on accurate operation parameters of all stationary transmitters of mobile communication base stations, and radio broadcast and television transmitters for an extended urban and suburban region in the Basel area (Switzerland). The model was evaluated by calculating Spearman rank correlations and weighted Cohen's kappa (κ) statistics between the model predictions and measurements obtained at street level, in the homes of volunteers, and in front of the windows of these homes. The correlation coefficients of the numerical predictions with street level measurements were 0.64, with indoor measurements 0.66, and with window measurements 0.67. The kappa coefficients were 0.48 (95%‐confidence interval: 0.35–0.61) for street level measurements, 0.44 (95%‐CI: 0.32–0.57) for indoor measurements, and 0.53 (95%‐CI: 0.42–0.65) for window measurements. Although the modeling of shielding effects by walls and roofs requires considerable simplifications of a complex environment, we found a comparable accuracy of the model for indoor and outdoor points. Bioelectromagnetics 31:226–236, 2010. © 2009 Wiley‐Liss, Inc.
Der Epitheliale Natrium Kanal. 15 Jahre Kanalarbeiten
Authors: Althaus Mike , Morty Rory E. , Clauss Wolfgang , Fronius Martin 
Published: October 2009

AbstractEpitheliale Natrium Kanäle (ENaCs) sind Natrium leitende Ionenkanäle, die in der apikalen Membran vieler Epithelien vorkommen. Sie sind der zentrale Faktor zum transepithelialen Transport von Natrium – und damit einhergehend von Wasser. ENaCs tragen zu einer Vielzahl physiologischer Prozesse bei: Regulation des Salz‐ und Wasserhaushalts, des Blutdrucks oder des Wassergehaltes der Lunge. Auch Erkrankungen wie Bluthochdruck oder Lungenödeme lassen sich auf gestörte Regulationen des ENaC zurückführen. Dieser Artikel beschreibt die Funktion und Physiologie Epithelialer Natrium Kanäle, sowie zelluläre Mechanismen, die die Aktivität dieser Ionenkanäle bestimmen.
Die vielen Seiten des Sulfids. Tödlich und doch lebensnotwendig
Authors: Hildebrandt Tatjana , Grieshaber Manfred K. 
Published: October 2009

AbstractSchwefelwasserstoff ist äußerst giftig und hat dennoch zahlreiche physiologische Funktionen. Tiere aus sulfidhaltigen Lebensräumen können sich effektiv vor einer Sulfidvergiftung schützen und nutzen diese reduzierte Schwefelverbindung sogar als Energielieferant. Das reichhaltige Leben an den Hydrothermalquellen der Tiefsee basiert vollständig auf der Oxidation anorganischer Substanzen, wobei Sulfid eines der Hauptsubstrate ist. Für den Menschen spielt Sulfid als gasförmiges Signalmolekül eine wichtige Rolle. Es wird in vielen Geweben produziert und ist an einigen entscheidenden Stoffwechselvorgängen, wie beispielsweise der Regulation des Blutdrucks und der Insulinsekretion beteiligt. Störungen des Schwefelstoffwechsels führen zu verschiedenen Erkrankungen, so dass die genaue Kenntnis der Umsetzung und Wirkungsweisen von Sulfid medizinisch von großem Interesse ist.
Duftstoffe im Erdreich. Flüchtige Metabolite als Infochemikalien
Authors: Kai Marco , Wenke Katrin , Piechulla Birgit 
Published: October 2009

AbstractFlüchtige Metabolite breiten sich nicht nur in der Atmosphäre aus und sind dort biologisch wirksam, sondern auch unterirdisch lebende Organismen nutzen die flüchtigen Substanzen als Kommunikationsmittel, zur Abwehr und Anlockung und zur Zell‐Zell‐Erkennung. Dabei sind verschiedene Eukaryoten (beispielsweise Pflanzen(wurzeln), Invertebraten, Pilze), aber auch Prokaryoten (beispielsweise Rhizobakterien) an Interaktionen, die durch Duftstoffe vermittelt werden, nachweislich beteiligt.
Visualisierung von Genomen
Authors: Fester Thomas 
Published: October 2009

AbstractEin neues Visualisierungsverfahren ermöglicht es, Genomdaten in der Form virtueller Welten darzustellen. Dieses Verfahren bildet eine gute Plattform zur allgemeinverständlichen Veranschaulichung wissenschaftlicher Ergebnisse auf Genomebene.
Catalytic Carbon Oxidation in The Presence of Cerium Oxide: Experimental Study and Modeling of The Effect of Oxygen Concentration
Authors: Issa M. , Mahzoul H. , Brillard A. , Brilhac J.‐F. 
Published: October 2009

AbstractThe catalytic combustion of carbon black (CB) used as a model of diesel soot in tight contact with a commercial ceria (CeO2) was investigated. Oxygen mole fractions of 10, 5, and 1 % in the gas phase were tested in order to gain a better understanding of the redox properties of ceria and the mechanism of the catalytic oxidation of carbon black. Both isothermal and temperature programmed runs are performed to extract kinetic parameters, such as activation energy and reaction order with respect to oxygen partial pressure. The experimental data are used to propose a model of CB oxidation in the presence of CeO2 allowing the simulation of carbon oxidation.
Kinetic Resolution of Aminoalkenes by Asymmetric Hydroamination: A Mechanistic Study
Authors: Reznichenko Alexander L. , Hampel Frank , Hultzsch Kai C. 
Published: October 2009

AbstractThe kinetic resolution of chiral aminoalkenes by hydroamination–cyclization was studied by using 3,3′‐bis(triarylsilyl)‐substituted binaphtholate rare‐earth‐metal complexes. The resolution of 1‐arylaminopentenes proceeds with high efficiency and high trans‐diastereoselectivity, whereas the resolution process of 1‐alkylaminopentenes suffers from decreasing resolution efficiency with increasing steric demand of the aliphatic substituent. Kinetic studies of the matching and mismatching substrate–catalyst pair by using enantiopure substrates and either the (R)‐ or (S)‐binaphtholate catalysts revealed that the difference in resolution efficiency stems from a shift of the Curtin–Hammett pre‐equilibrium. Although 1‐arylaminopentenes favor the matching substrate–catalyst complex, preference for the mismatching substrate–catalyst complex for 1‐alkylaminopentenes diminishes resolution efficiency. Nevertheless, the relative cyclization rate for the two diastereomeric substrate–catalyst complexes remains in a typical range of 7–10:1. Plausible attractive π interactions between the aryl substituent and either the metal center or the aromatic system of the bis(triarylsilyl)‐substituted binaphtholate ligand may explain increased stability of the matching substrate–catalyst complex. Incidentally, the methoxymethyl (MOM)‐substituted aminopentene 3 g also exhibited a strong preference for the matching substrate–catalyst complex, possibly due to the chelating nature of the MOM substituent. The proximity of the stereocenter to the amino group in the aminoalkene substrate was crucial to achieve good kinetic resolution efficiency. The more remote β‐phenyl substituent in 2‐phenylpent‐4‐en‐1‐amine (5) resulted in diminished discrimination of the substrate enantiomers with respect to the relative rate of cyclization of the two substrate–catalyst complexes and a Curtin–Hammett pre‐equilibrium close to unity.
ChemInform Abstract: Phase Diagram of the La—Si Binary System under High Pressure and the Structures of Superconducting LaSi5 and LaSi10.
Authors: Yamanaka Shoji , Izumi Satoshi , Maekawa Shoichi , Umemoto Keita 
Published: October 2009

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 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 and Characterization of La0.8Sr1.2Co0.5Mo0.5 O4‐δ (M: Fe, Mn).
Authors: El Shinawi H. , Marco J. F. , Berry F. J. , Greaves C. 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: VNb9O25‐δ — Synthesis, Electrical Conducting Behavior and Density Functional Theory (DFT) Calculation.
Authors: Bergner Carina , Vashook Vladimir , Leoni Stefano , Langbein Hubert 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: [Zn6Sn3Bi8]4‐. Expanding the Intermetalloid Zintl Anion Concept to Ternary Systems.
Authors: Lips Felicitas , Dehnen Stefanie 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: UF6 and UF4 in Liquid Ammonia: [UF7(NH3)]3‐ and [UF4(NH3)4].
Authors: Kraus Florian , Baer Sebastian A. 
Published: October 2009

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 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 Cluster with a Mixed M6X12/M6X8 Environment: The La6Cl11Co Structure.
Authors: Zheng Chong , Mattausch Hansjuergen , Hoch Constantin , Simon Arndt 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Europium Substitution into Intermetallic Phases Grown in Ca/Zn Flux.
Authors: Stojanovic Milorad , Latturner Susan E. 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: BaAuP and BaAuAs, Synthesis via Disproportionation of Gold upon Interaction with Pnictides as Bases.
Authors: Nuss Juergen , Jansen Martin 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: α′‐Hydroxyenones as Mechanistic Probes and Scope‐Expanding Surrogates for α,β‐Unsaturated Aldehydes in N‐Heterocyclic Carbene‐Catalyzed Reactions.
Authors: Chiang Pei‐Chen , Rommel Michael , Bode Jeffrey W. 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Aerobic Photooxidative Cleavage of the C—C Double Bonds of Styrenes.
Authors: Hirashima Shin‐ichi , Kudo Yasuhisa , Nobuta Tomoya , Tada Norihiro , Itoh Akichika 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Catalytic Effect of Alloxazinium and Isoalloxazinium Salts on Oxidation of Sulfides with Hydrogen Peroxide in Micellar Media.
Authors: Cibulka Radek , Baxova Lenka , Dvorakova Hana , Hampl Frantisek , Menova Petra , Mojr Viktor , Plancq Baptiste , Sayin Serkan 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Iridium‐Catalyzed Asymmetric Hydrogenation of Enamides in the Presence of 3,3′‐Substituted H8‐Phosphoramidites.
Authors: Erre Giulia , Enthaler Stephan , Junge Kathrin , Addis Daniele , Beller Matthias 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Microwave‐Promoted Mono‐N‐alkylation of Aromatic Amines in Water: A New Efficient and Green Method for an Old and Problematic Reaction.
Authors: Marzaro Giovanni , Guiotto Adriano , Chilin Adriana 
Published: October 2009

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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.