bluuebunny/crossref_metadata_2025_split huggingface dataset:
Palladium‐Catalyzed Aerobic Oxidation of Naturally Occurring Allylbenzenes as a Route to Valuable Fragrance and Pharmaceutical Compounds
Authors: Parreira Luciana A. , Menini Luciano , da Cruz Santos Joyce C. , Gusevskaya Elena V. 
Published: May 2010

AbstractA palladium‐catalyzed, aerobic oxidation of naturally occurring allylbenzenes, i.e., eugenol, methyleugenol, safrole, and estragole, in dimethylacetamide/water solutions under mild conditions has been developed, in which palladium(II) chloride is used in the absence of co‐catalysts or special stabilizing ligands as the sole and recyclable catalyst. Methyl ketones that are important for the flavour and pharmaceutical industries have been obtained in good to excellent yields with low catalyst loadings (1–2 mol%) and high average turnover frequencies. This simple catalytic method represents an ecologically benign and economically attractive route to industrially valuable compounds starting from renewable substrates easily available from essential oils.
Enrichment of coal‐bed methane by PSA complemented with CO2 displacement
Authors: Liu Congmin , Zhou Yaping , Sun Yan , Su Wei , Zhou Li 
Published: May 2010

AbstractA PSA cycle complemented with CO2 displacement was studied for enriching coal‐bed methane (CBM). The column was first pressurized to the adsorption pressure with feed gas, and then N2 was produced at column top in step 2. The feed gas switched to CO2 at the end of step 2, and the adsorbed CH4 was displaced and pushed to column top by CO2 becoming the second column‐top product in step 3. The CO2 stream was shut off before it broke through the sorption bed. Then bed regeneration followed. A series of CH4/N2 mixtures containing 17.62 to 51.33% CH4 was used for feed gas. It was experimentally shown that the product concentration was higher than 90%, and methane recovery was higher than 98% even for the feed of low‐methane concentration. Displacement at ambient pressure was shown more efficient than the displacement at adsorption pressure for the enrichment. © 2010 American Institute of Chemical Engineers AIChE J, 2011
Functionalization of multiwalled carbon nanotubes with amphiphilic poly(aspartic acid)
Authors: Ji Peijun , Yang Mei , Feng Wei 
Published: May 2010

AbstractA new method to functionalize multiwalled carbon nanotubes (MWNTs) with amphiphilic poly(aspartic acid) was investigated. The amphiphilic polymer (PASP‐C16) was synthesized by thermal condensation and aminolysis by hexadecylamine, followed by hydrolysis of the remaining succinimide units in the polymer backbone. The functionalization of MWNTs was achieved by physical adsorption of the biopolymer onto the surfaces of MWNTs. Ultraviolet‐visible (UV‐vis) spectra showed that the functionalized MWNTs had a good aqueous dispersity and solubility. The interaction of PASP‐C16 with MWNTs was investigated by analyzing X‐ray diffraction (XRD) patterns, circular dichroism (CD), spectra and high‐resolution transmission electron microscopy (HRTEM). From the XRD patterns, it can be known that the aggregate of PASP‐C16 due to intermolecular interaction between hexadecyl chains has been reduced when the polymer interacting with MWNTs. CD spectra indicated that the interaction of hexadecyl chains of PASP‐C16 with the wall of MWNTs is the major interaction between PASP‐C16 and MWNTs, and MWNTs were covered by the poly(aspatic acid) backbone. © 2010 American Institute of Chemical Engineers AIChE J, 2011
Wax deposition modeling of oil/water stratified channel flow
Authors: Huang Zhenyu , Senra Michael , Kapoor Ravi , Fogler H. Scott 
Published: May 2010

AbstractWax deposition modeling becomes complicated when multiphase flow is involved. Empirical heat and mass transfer correlations are unreliable for multiphase deposition modeling and full scale computational fluid dynamics calculations require expensive computational intensity. In this work, numerical methods are used to study wax deposition in oil/water stratified flow through a channel. A unidirectional flow analysis is used to calculate the nonisothermal hydrodynamics and mass transfer. It was found that the change in the position of the oil/water interface throughout the channel must be taken into accounted for the mass balance to be valid. Unfortunately, this change has not been accounted for in all previous studies. In addition, the growth of the wax deposit as a function of time along with the effect of oil/water flow rate ratio is discussed. The presence of water significantly reduces the severity of wax deposition by altering the heat and mass transfer characteristics. © 2010 American Institute of Chemical Engineers AIChE J, 2011
Carben‐Übergangsmetallkomplexe durch zweifache C‐H‐Bindungsaktivierung
Authors: Werner Helmut 
Published: May 2010

AbstractDie Aktivierung einer einzelnen sp3‐C‐H‐Bindung von Alkanen und ihren Derivativen durch elektronenreiche Übergangsmetallkomplexe wurde seit den 1982 erschienenen bahnbrechenden Arbeiten von Bergman und Graham zu einem viel bearbeiteten Forschungsprojekt. Zehn Jahre später wurde gezeigt, dass Verbindungen der 5d‐Elemente, z. B. von Osmium und Iridium, auch zu einer zweifachen α‐C‐H‐Bindungsaktivierung von Alkan‐ oder Cycloalkanderivaten fähig sind, sofern diese eine funktionelle Gruppe wie OR oder NR2 besitzen. Damit war ein neuer Zugang zu Carbenkomplexen der Übergangsmetalle vom Fischer‐Typ eröffnet. Nachfolgende Arbeiten konzentrierten sich zuerst auf die Umwandlung von Alkyl(methyl)‐ und Aryl(methyl)ethern in Oxocarben‐ und von Dimethylaminen in Aminocarbenliganden. Kürzlich wurde gezeigt, dass so hergestellte quadratisch‐planare Oxocarbeniridium(I)‐Komplexe zu einem ungewöhnlichen Reaktivitätstyp befähigt sind. Sie reagieren mit CO2 , CS2 , COS, PhNCO und PhNCS gemäß einer Atom‐ oder Gruppentransfermetathese, für die es bisher kein Beispiel gibt. Organoazide RN3 und N2O verhalten sich ähnlich. Jüngste Ergebnisse weisen darauf hin, dass solche Metathesereaktionen auch katalytisch durchgeführt werden können, wodurch sich eine neue Möglichkeit zur Funktionalisierung von C‐H‐Bindungen bietet.
Carbene–Transition Metal Complexes Formed by Double CH Bond Activation
Authors: Werner Helmut 
Published: May 2010

AbstractThe activation of a single sp3 CH bond of alkanes and their derivatives by electron‐rich transition metal complexes has been a topic of interest since the landmark work by Bergman and Graham in 1982. Ten years later, it was shown that compounds of 5d elements, such as osmium and iridium, even enable a double α‐CH bond activation of alkane or cycloalkane derivatives containing an OR or NR2 functional group, thus opening up a new route to obtain Fischer‐type transition metal carbene complexes. Subsequent work focused in particular on the conversion of methyl alkyl and methyl aryl ethers into bound oxocarbenes and also of dimethyl amines to bound aminocarbenes. In the context of this work, it was recently shown that square‐planar oxocarbene–iridium(I) complexes prepared in this way exhibit an unusual mode of reactivity: They react with CO2, CS2, COS, PhNCO, and PhNCS by an atom‐ or group‐transfer metathesis, which has no precedent. Organic azides RN3 and N2O behave similarly. Recent results confirm that this novel type of metathesis can be made catalytic, thus offering a novel possibility for CH bond functionalization.
Effects of curing systems and polysulfonamide pulp on the curing characteristics, mechanical properties, and swelling behavior of ethylene–propylene–diene elastomer composites
Authors: Jia Xiaolong , Yu Yunhua , Li Gang , Sui Gang , Li Peng , Yang Xiaoping 
Published: May 2010

AbstractThe effects of three curing systems and polysulfonamide (PSA) pulp on the curing characteristics, mechanical properties, and swelling behavior of ethylene–propylene–diene elastomer (EPDM) composites were investigated. The maximum torque value and the optimum curing time were highest for EPDM composites cured with a peroxide system, and they were closely followed by those cured with a sulfur system. In comparison with those cured with peroxide and phenolic resin systems, EPDM composites cured with the sulfur system showed higher mechanical properties and dimensional stability. With increasing PSA pulp content, the maximum torque value of the EPDM composites increased, whereas the optimum curing time of the composites decreased. The orientation percentage of the PSA pulp in the EPDM composites was maximum at 30 phr pulp, as determined from green strength measurements. In the longitudinal direction along which the pulp was oriented, the EPDM composites showed higher tensile strength as well as lower elongation and swelling ratios. Also, with increasing PSA pulp content, the tensile strength of the EPDM composites decreased up to 10 phr pulp and subsequently increased, whereas the elongation and swelling ratio of the EPDM composites decreased linearly. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Flexibility improvement of poly(lactic acid) by stearate‐modified layered double hydroxide
Authors: Mahboobeh Eili , Yunus Wan Md Zin Wan , Hussein Zobir , Ahmad Mansor , Ibrahim Nor Azowa 
Published: May 2010

AbstractPoly(lactic acid)/layered double hydroxide (PLA/LDH) nanocomposites were prepared from PLA and stearate‐Mg3Al LDH via a solution casting method. The anionic clay Mg3Al LDH was prepared first by coprecipitation method from nitrate salts solution at pH 9 and then modified by stearate anions through an ion exchange reaction. This modification increased the basal spacing of the synthetic clay from 8.72 to 31.68 Å. The presence of stearate ions in the synthesized Mg3Al LDH was shown by the stearate‐Mg3Al LDH infrared spectrum. When the stearate‐Mg3Al LDH at the low concentration was dispersed in the PLA matrix, its layers were largely delaminated. The presence of 1.0 wt % of the stearate‐Mg3Al LDH in the PLA improved drastically (of around 650%) of its elongation at break but retained its tensile strength and modulus as compared to those of the pure PLA. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010
Big Macs and Eigenfactor scores: Don't let correlation coefficients fool you
Authors: West Jevin , Bergstrom Theodore , Bergstrom Carl T. 
Published: May 2010

AbstractThe Eigenfactor™ Metrics provide an alternative way of evaluating scholarly journals based on an iterative ranking procedure analogous to Google's PageRank algorithm. These metrics have recently been adopted by Thomson Reuters and are listed alongside the Impact Factor in the Journal Citation Reports. But do these metrics differ sufficiently so as to be a useful addition to the bibliometric toolbox? Davis (2008) has argued that they do not, based on his finding of a 0.95 correlation coefficient between Eigenfactor score and Total Citations for a sample of journals in the field of medicine. This conclusion is mistaken; in this article, we illustrate the basic statistical fallacy to which Davis succumbed. We provide a complete analysis of the 2006 Journal Citation Reports and demonstrate that there are statistically and economically significant differences between the information provided by the Eigenfactor Metrics and that provided by Impact Factor and Total Citations.
Rosette‐Shaped Calcite Structures at Surfaces: Mechanistic Implications for CaCO3 Crystallization
Authors: Yang Sung Ho , Choi Insung S. 
Published: May 2010

AbstractBiomineralization is believed to be achieved by the intimate cooperation of soluble macromolecules and an insoluble matrix at the specific inorganic–organic interface. It has been reported that positively charged matrices play an important role in controlling the structure of CaCO3 at surfaces, although detailed mechanisms remain unclear. In this work, we studied the transformation from amorphous CaCO3 to calcite crystals on surfaces by using thin films of poly(2‐(dimethylamino)ethyl methacrylate) (PDMAEMA) and its quaternized form. The positively charged PDMAEMA film was found to possess unique properties for CaCO3 crystallization: individually separated, single calcite crystals were formed on the PDMAEMA film in the absence of poly(acrylic acid) (PAA), while circularly fused calcite crystals were formed in the presence of PAA. The circularly fused (rosette‐shaped) calcite crystals could be changed from a completely packed rosette to a ring‐shaped, hollow structure by tuning the crystallization conditions. A number of factors, such as reaction time, amount of (NH4)2CO3, concentration of PAA, and charge of matrix‐films, were varied systematically, and we now propose a mechanism based on these observations.
Serum starvation improves transient transfection efficiency in differentiating embryonic stem cells
Authors: Wallenstein Eric J. , Barminko Jeffrey , Schloss Rene S. , Yarmush Martin L. 
Published: May 2010

AbstractControl of genetic expression is a critical issue in the field of stem cell biology, where determining a cell fate or reprogramming adult somatic cells into pluripotent cells has become a common experimental practice. In turn, for these cells to have therapeutic clinical potential, techniques for controlling gene expression are needed that minimizes or eliminates the risk of oncogenesis and mutagenesis. Possible routes for achieving this outcome could come in the form of a transient nonviral gene delivery system. In this study, we improved the efficiency of transient gene delivery to differentiating murine embryonic stem (ES) cells via serum starvation for 3 days before transfection. The transient expression of a constitutively‐controlled plasmid increased from ∼50% (replated control) to ∼83% when transfected after 3 days of serum starvation but decreased to ∼28% when transfected after 3 days in normal high serum‐containing media. When probed with a liver‐specific reporter, Cyp7A1, expression increased from ∼1.4% (replated control) to ∼3.7% when transfected after 3 days of serum starvation but decreased to ∼0.7% when transfected after 3 days in high serum‐containing media. Cy3‐tagged oligonucleotides were used to rapidly quantify DNA uptake and predict ultimate transfection efficiency. This study suggests that modifications in media serum levels before transfection can have a profound effect on improving nonviral gene delivery. © 2010 American Institute of Chemical Engineers Biotechnol. Prog., 2010
Preorganized, Macromolecular, Gene‐Delivery Systems
Authors: Ortiz Mellet Carmen , Benito Juan M. , García Fernández José M. 
Published: May 2010

AbstractViruses represent a paradigmatic example of multicomponent, self‐organized supramolecular systems specialized in the delivery and replication of their genetic material. Mimicking their functioning by artificial synthetic molecules represents a fantastic challenge that will lead to the future development of gene therapy. This is only possible if general approaches towards the construction of nanoscale vehicles for DNA are developed and the key rules governing their capacity to compact genetic material and its active transport/delivery through cell membranes are understood. In this area of research, synthetic organic chemistry plays an important role by providing tools to create tailor‐made molecules of increasing complexity. Preorganization of functional elements onto macromolecular platforms has the potential to allow control of the self‐assembling behavior of discrete architectures to produce nanometric objects that can be programmed to complex, compact, deliver, and release plasmid DNA in a target cell.
ChemInform Abstract: Synthesis, Characterization, and Photophysical Properties of a Series of Supramolecular Mixed‐Valence Compounds.
Authors: Pfennig Brian W. , Fritchman Virginia A. , Hayman Katie A. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Ni(II)‐Doped CsCdBrCl2: Variation of Spectral and Structural Properties via Mixed‐Halide Coordination.
Authors: Luethi S. R. , Riley M. J. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Electronic Fine Tuning of the Structures of Reduced Rare‐Earth Metal Halides.
Authors: Koeckerling Martin , Martin James D. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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, Structural Characterization and Magnetic Properties of LnCrO4 Oxides, Ln: Nd, Sm, Eu and Lu.
Authors: Jimenez E. , Isasi J. , Saez‐Puche R. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Resistivity Changes During Hydrogenation of Pd80Ag20 Alloy in Non‐equilibrium Circumstances.
Authors: Toth J. , Garaguly J. , Peter L. , Tompa K. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Magnetic Properties of the LnCo3Sn (Ln: Gd to Tm) Compounds.
Authors: Mudryk J. , Fruchart D. , Gignoux D. , Romaka L. P. , Skolozdra R. V. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Crystallographic, Magnetic and Magnetocaloric Properties of GdMgX Intermetallic Phases (X: Al, Ga, In).
Authors: Canepa F. , Fornasini M. L. , Merlo F. , Napoletano M. , Pani M. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Evidence for a Lower Enthalpy of Formation of Hydroxyl Radical and a Lower Gas‐Phase Bond Dissociation Energy of Water.
Authors: Ruscic Branko , Feller David , Dixon David A. , Peterson Kirk A. , Harding Lawrence B. , Asher Robert L. , Wagner Albert F. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Ternary System Sm2O3—SrO—CuO: Compounds and Phase Relations.
Authors: Han C. Q. , Chen X. L. , Liang J. K. , Liu Q. L. , Rao G. H. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Isothermal Section of the Phase Diagram of the La—Ni—Ti Ternary System at 673 K.
Authors: Jingqi Liu , Ke Geng 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Photochemical Properties of Cd0.8Zn0.2S Pillared H1‐xCa2‐xLaxNb3O10.
Authors: Fukugami Yasuhiko , Sato Tsugio 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Crystal Structure of Metastable ϰ‐CeZrO4 Phase Possessing an Ordered Arrangement of Ce and Zr Ions.
Authors: Kishimoto Haruo , Omata Takahisa , Otsuka‐Yao‐Matsuo Shinya , Ueda Kazushige , Hosono Hideo , Kawazoe Hiroshi 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Co‐Catalyst Dependent Cycloisomerization or Ring Closing Metathesis of α,ω‐Dienes Catalyzed by Arene Ruthenium Complex with Side‐Arm Alcohol.
Authors: Miyaki Yoshiharu , Onishi Takafumi , Ogoshi Sensuke , Kurosawa Hideo 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 X‐Ray Structure of Metalated Rhodium(II) Catalysts with a Chiral Phospholane.
Authors: Estevan Francisco , Krueger Peter , Lahuerta Pascual , Moreno Eduardo , Perez‐Prieto Julia , Sanau Mercedes , Werner Helmut 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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: Kinetic Resolution of Amines by a Nonenzymatic Acylation Catalyst.
Authors: Arai Shigeru , Bellemin‐Laponnaz Stephane , Fu Gregory C. 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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 Molybdenum(0)‐Catalyzed Allylic Substitution.
Authors: Malkov Andrei V. , Spoor Paul , Vinader Victoria , Kocovsky Pavel 
Published: May 2010

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 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.