bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Host Sensitization of Tb3+ Ions in Tribarium Lanthanide Borates Ba3Ln(BO3)3 (Ln: Lu and Gd).
Authors: Wang De‐Yin , Chen Teng‐Ming , Cheng Bing‐Ming 
Published: May 2012

AbstractThe Tb3+‐doped and undoped title compounds are characterized by powder XRD and photoluminescence spectroscopy.
ChemInform Abstract: One‐Pot Aerosol Route to MoO3—SiO2—Al2O3 Catalysts with Ordered Super Microporosity and High Olefin Metathesis Activity.
Authors: Debecker Damien P. , Stoyanova Mariana , Colbeau‐Justin Frederic , Rodemerck Uwe , Boissiere Cedric , Gaigneaux Eric M. , Sanchez Clement 
Published: May 2012

AbstractThe title catalysts are prepared by spraying of aqueous solutions containing Si(OEt)4, ethanol, a block copolymer (Brij58), AlCl3, and H3PMo12O40 or MoCl5, followed by fast drying of the obtained aerosol and calcination of the produced solid at 550 °C (8 h) resulting in complete removal of Brij58.
ChemInform Abstract: Unprecedented Layer Topology in the Crystal Structure of a New Organically Templated Uranyl Selenite‐Selenate.
Authors: Kovrugin Vadim M. , Gurzhiy Vladislav V. , Krivovichev Sergey V. , Tananaev Ivan G. , Myasoedov Boris F. 
Published: May 2012

AbstractYellowish green transparent plates of (Me2NH2) [(H5O2)(H2O)] [(UO2)2(SeO4)3 (H2SeO3)](H2O) are prepared from aqueous solutions of UO2(NO3)2, H2SeO4, and dimethylamine (20 °C, 3 d).
ChemInform Abstract: Synthesis, Structures and Properties of the New Lithium Cobalt(II) Phosphate Li4Co(PO4)2.
Authors: Glaum R. , Gerber K. , Schulz‐Dobrick M. , Herklotz M. , Scheiba F. , Ehrenberg H. 
Published: May 2012

AbstractThe new title compound α‐Li4Co(PO4)2 is synthesized from stoichiometric mixtures of Li4P2O7 and CoO (silica tube, 850 °C, 72 h).
ChemInform Abstract: Formal Intermolecular [2 + 2] Cycloaddition Reaction of Alleneamides with Alkenes via Gold Catalysis.
Authors: Li Xiao‐Xiao , Zhu Li‐Li , Zhou Wen , Chen Zili 
Published: May 2012

AbstractThe Au‐catalyzed treatment of alleneamides with electron‐rich alkenes allows an efficient access to functionalized cyclobutanes.
ChemInform Abstract: Domino Reactions for the Synthesis of Various α‐Substituted Nitro Alkenes.
Authors: Fioravanti Stefania , Pellacani Lucio , Vergari Maria Cecilia 
Published: May 2012

AbstractThe synthesis of a variety of 2‐nitroallylic alcohols (VI), α‐nitro‐α,β‐unsaturated carbonyl compounds (III)/(IV) and (VIII)/(IX) is presented, involving a domino Henry condensation—dehydration—MBH reaction of β‐nitroethanol as well as α‐nitrocarbonyl compounds with aromatic and aliphatic aldehydes.
ChemInform Abstract: Enantioselective Synthesis of Branched Allylic Esters via Rhodium‐Catalyzed Coupling of Allenes with Carboxylic Acids.
Authors: Koschker Philipp , Lumbroso Alexandre , Breit Bernhard 
Published: May 2012

AbstractThe intermolecular asymmetric addition proceeds regioselectively affording valuable branched allylic esters.
ChemInform Abstract: Thio‐Claisen Rearrangement Used in Preparing anti‐β‐Functionalized γ,δ‐Unsaturated Amino Acids: Scope and Limitations.
Authors: Liu Zhihua , Mehta Sukeshi J. , Lee Kwang‐Soo , Grossman Bryan , Qu Hongchang , Gu Xuyuan , Nichol Gary S. , Hruby Victor J. 
Published: May 2012

AbstractFeBr3‐catalyzed or LDA‐mediated S‐alkylation of thioamides followed by thio‐Claisen rearrangement allows a regio‐, diastereo‐, and enantioselective access to the title compounds.
ChemInform Abstract: Access to Polyfunctionalized Diquinanes, Hydrindans, and Decalines via TiCl4‐ Promoted Michael—Aldol and Baylis—Hillman Reactions.
Authors: Ressault Blandine , Jaunet Alexis , Goeffroy Philippe , Goudedranche Sebastien , Miesch Michel 
Published: May 2012

AbstractCyclopentanones and cyclohexanones tethered to α,β‐unsaturated ketones are treated with TiCl4 to afford mostly Michael‐aldol products.
ChemInform Abstract: A Ring Fragmentation Approach to Medium‐Sized Cyclic 2‐Alkynones.
Authors: Tsvetkov Nikolay P. , Bayir Ali , Schneider Samuel , Brewer Matthias 
Published: May 2012

AbstractThe reaction of various bicyclic diazoketones of type (I) or (III) is mediated by SnCl4 to provide cyclic 2‐alkynones with a ring size up to 12 C‐atoms.
ChemInform Abstract: Highly Selective Trifluoromethylation of 1,3‐Disubstituted Arenes Through Iridium‐Catalyzed Arene Borylation.
Authors: Liu Tianfei , Shao Xinxin , Wu Yaming , Shen Qilong 
Published: May 2012

AbstractThe sequential iridium‐catalyzed borylation and copper‐catalyzed trifluoromethylation of arenes is performed under mild conditions and tolerates a variety of functional groups.
ChemInform Abstract: Pyridine‐Catalyzed Double C—N Coupling Reaction of an Isocyanate with Two Benzynes.
Authors: Lee Yi‐Hsien , Chen Yen‐Chung , Hsieh Jen‐Chieh 
Published: May 2012

AbstractUnder optimized conditions variously substituted diaryl‐ and triarylamines are formed.
ChemInform Abstract: Wittig Olefination via an Yttrium‐Coordinated Betaine.
Authors: Crimmin Mark R. , White Andrew J. P. 
Published: May 2012

AbstractThe title complex (I) is an exceedingly rare example of a hydrocarbon‐soluble, thermally stable, metal‐coordinated betaine which allows to study the Wittig olefination from an isolated intermediate.
ChemInform Abstract: One‐Pot Synthesis of Unsymmetrical Benzils by Oxidative Coupling Using Selenium Dioxide and p‐Toluenesulfonic Acid Monohydrate.
Authors: Rohman Md. Rumum , Kharkongor Icydora , Rajbangshi Mantu , Mecadon Hormi , Laloo Badaker M. , Sahu Priti R. , Kharbangar Iadeishisha , Myrboh Bekington 
Published: May 2012

AbstractThe coupling of the α‐carbon atom of aromatic/heteroaromatic ketones with unactivated arenes proceeds with high regioselectivity.
ChemInform Abstract: Catalyst‐Free Suzuki‐Type Coupling of Allylic Bromides with Arylboronic Acids.
Authors: Scrivanti Alberto , Beghetto Valentina , Bertoldini Matteo , Matteoli Ugo 
Published: May 2012

AbstractThe reactions are completely regioselective affording only the α‐coupled products by use of a base and wet boronic acids containing 1.4‐3.0 mol of water per mol of acid and without exclusion of air.
ChemInform Abstract: Chemoselective Aromatic C—H Insertion of α‐Diazo‐β‐ketoesters Catalyzed by Dirhodium(II) Carboxylates.
Authors: Rodriguez‐Cardenas Esdrey , Sabala Rocio , Romero‐Ortega Moises , Ortiz Aurelio , Olivo Horacio F. 
Published: May 2012

AbstractCatalysts Rh2(esp)2 and Rh2(tpa)4 are shown to be superior to Rh2(OAc)4.
ChemInform Abstract: Stereoselective Synthesis of 2,3‐Disubstituted Dihydrobenzofuran Using Alkyne Prins Type Cyclization to Vinylogous Carbonates.
Authors: Gharpure Santosh J. , Prasath V. 
Published: May 2012

Abstracttrans‐2,3‐Disubstituted dihydrobenzofuran derivatives (VI) (13 examples) are stereoselectively obtained in an intramolecular, alkyne Prins‐type cyclization of vinylogous carbonates obtained from o‐alkynylphenols.
ChemInform Abstract: A Facile Synthesis of 4‐Aryl‐1,2,3,4‐tetrahydroisoquinolines.
Authors: Hu Min , Guzzo Peter R. , Zha Congxiang , Nacro Kassoum , Yang Yuh‐Lin , Hassler Carla , Liu Shuang 
Published: May 2012

AbstractA Pd‐catalyzed α‐arylation of isoquinoline derivative (I) with aryl bromides affords the 4‐substituted products with different yields depending on the halide used.
ChemInform Abstract: A New 3‐(Ethoxycarbonylmethyl)isoxazolopyridone as a Precursor to Acylpyridones.
Authors: Jones Raymond C. F. , Iley James N. , Loizou Georgia 
Published: May 2012

AbstractTitle compounds (VI) and (XVI) are synthesized starting from esters (I) or (XII), resp., via dipolar cycloaddition of nitrile oxides derived from the latter in situ with enamino‐ester (III).
ChemInform Abstract: Synthesis of Octahydroquinolizinones Aza‐Analogues of Terpenoid Skeletons.
Authors: Brandi Alberto , Cordero Franca M. , Vurchio Carolina , Lucentini Massimo , Cicchi Stefano 
Published: May 2012

AbstractTitle compounds [(VII) and (XI)] are synthesized starting from nitrones (I) or (VIII), resp., by rearrangement of spiro compounds (VI) or (X), resp., under flash vacuum thermolysis conditions.
ChemInform Abstract: The Synthesis and Antimicrobial Evaluation of Some Spirophthalidyl Benzoxazinones.
Authors: Ferraro Caterina , Lengyel Istvan , Stephani Ralph 
Published: May 2012

AbstractCondensation of N‐substituted anthranilic acids (I) with symmetrical phthaloyl dichloride (II) yields the spiro‐phthalidyl benzoxazinediones (III) which are considered as antimicrobial agents, in view of their similar structure to griseofulvin.
ChemInform Abstract: Synthesis of 8‐R‐7‐Amino‐3‐tert‐butylpyrazolo[5,1‐c][1,2,4]triazin‐4(6H)‐one Derivatives.
Authors: Mironovich L. M. , Kostina M. V. 
Published: May 2012

AbstractThe exocyclic functional groups in cyclization products (III) undergo further reactions such as alkylation, acylation, azomethine formation, hydrazinolysis, and saponification.
ChemInform Abstract: Asymmetric Synthesis of 2‐Propylisofagomine Using Allylic Hydroxy Group Accelerated Ring‐Closing Enyne Metathesis.
Authors: Taguchi Tatsuya , Imahori Tatsushi , Yoshimura Yuichi , Kato Atsushi , Adachi Isao , Kawahata Masatoshi , Yamaguchi Kentaro , Takahata Hiroki 
Published: May 2012

Abstract2‐Propylisofagomine (XIV) is prepared via a diastereoselective vinylation of aldehyde (IV), a ring‐closing metathesis of the resulting enyne (VI), and a stereoselective hydroboration—oxidation of alkene (XI) as key steps.
Chiral Sulfur Compounds Studied by Raman Optical Activity: tert‐Butanesulfinamide and its Precursor tert‐Butyl tert‐Butanethiosulfinate
Authors: Qiu Shi , Li Guanna , Lu Shengmei , Huang Baokun , Feng Zhaochi , Li Can 
Published: May 2012

ABSTRACTTwo chiral sulfur compounds, tert‐butyl tert‐butanethiosulfinate (1) and tert‐butanesulfinamide (2), with inversion of configuration, have been studied by Raman optical activity (ROA) and electronic circular dichroism combined with density functional theory calculation. With the S–S linkage in 1, the couplings between the two tertiary carbon atoms often generate large ROA signals, whereas the tertiary carbon atom itself generally makes a large contribution to ROA signals in 2 for similar vibrational modes. The conformational dependence of ROA parameters provides probing conformation around the S–S bond from a new perspective. The simultaneous use of electronic circular dichroism and ROA is warranted to extract reliable conformational information. ROA provides a suitable candidate for the stereochemical study of chiral sulfur compounds, especially its capability of sensing the conformation around the S–S bond. Chirality 24:731–740, 2012. © 2012 Wiley Periodicals, Inc.
Production of concrete paving blocks (CPB) utilising electroplating residues – evaluation of mechanical and micro‐structural properties
Authors: Tavares Célia Regina Granhen , de Melo Franco Janaina 
Published: May 2012

AbstractThe objective of this study was to use electroplating waste [blasting dust (BD) and electroplating sludge] for the production of concrete paving blocks (CPBs) by means of the solidification/stabilisation technique and to characterise the mechanical and micro‐structural properties of CPBs. Granulometric tests showed that electroplating residues have a size range that allows their use as aggregates. Blocks were produced with compositions of 5, 10, 15, 20 and 25% BD and electroplating sludge, and reference blocks (REF) were produced without the addition of residues. Blocks were cured for 7, 14, 28, 60 or 90 days. The blocks produced with 5%, 10% and 15% BD had compression resistances at 28 days of 42.60 MPa, 37.57 MPa and 35.6 MPa, respectively, all of which are above the Brazilian limits for paved areas to be used by light vehicles (35 MPa). In contrast, the specimens produced with electroplating sludge behaved differently, probably due to their water/agglomerate ratio and the limited interaction of the cement matrix with the aggregate, which influenced the observed compression resistance values. Only the blocks manufactured with 5% electroplating sludge showed resistance values above the limit established by Brazilian standards (35.43 MPa), but the values were inferior to those of the reference block (37.35 MPa). Therefore, the characteristics of the electroplating residues (BD and electroplating sludge) are acceptable as raw materials in civil construction. The solidification/stabilisation technique also appeared to be quite promising for the incorporation of electroplating residues into cement matrix for the fabrication of CPBs. © 2012 Canadian Society for Chemical Engineering
Catalytic olefin polymerisation at short times: Studies using specially adapted reactors
Authors: McKenna Timothy F. L. , Tioni Estevan , Ranieri Maria Maddalena , Alizadeh Arash , Boisson Christophe , Monteil Vincent 
Published: May 2012

AbstractDespite the fact that the very early stages (several tens of seconds) of catalysed olefin polymerisation processes appear negligibly short with respect to the residence time of most industrial reactors, they are critical in terms of catalyst activation, obtaining good particle morphology, and avoiding irreparable problems caused by particle overheating. The different types of reactors that have been used over the course of the past few years are discussed in this feature article. It is shown that despite the difficulties encountered in finding the perfect experimental tool for this purpose, different configurations of stopped flow reactors can be used successfully to explore different aspects of what happens to the catalyst (supported and molecular) during these critical moments of polymerisation. © 2012 Canadian Society for Chemical Engineering
The Hospital's Role in Improving Survival of Patients With Out‐of‐Hospital Cardiac Arrest
Authors: Kumar Sachin , Ewy Gordon A. 
Published: May 2012

AbstractOut‐of‐hospital cardiac arrest (OHCA) is a major public health problem. Unfortunately, in spite of recurring updated guidelines, survival of patients with OHCA had been unchanged for decades. Recently, new approaches to patients with OHCA during the community and prehospital phases of therapy for cardiac arrest have resulted in a dramatic improvement in survival. Further improvement in survival has resulted from hospitals designated as Cardiac Receiving Centers. These centers are committed to the treatment of post‐cardiac arrest syndrome by providing 24/7 therapeutic mild hypothermia, urgent cardiac catheterization and percutaneous coronary intervention, evidence‐based termination of resuscitation protocols that limit premature withdrawal of care, protocol to address organ donation, commitment of cardiocerebral resuscitation training in their community, and a commitment and proven ability of data collection to assure that instituted changes result in improved survival. This newer aspect of hospital practice is an aspect that needs to be embraced by either becoming a Cardiac Receiving Center or partnering with other hospitals that can provide this critically important service. Clin. Cardiol. 2012 doi: 10.1002/clc.21992The authors have no funding, financial relationships, or conflicts of interest to disclose.
Analysis of micro fracture in human Haversian cortical bone under compression
Authors: Jonvaux J. , Hoc T. , Budyn É. 
Published: May 2012

SUMMARYA procedure to investigate local stress intensity factors in human Haversian cortical bone under compression is presented. The method combines a customised experimental setting for micro‐compression tests of millimetric bone specimens and a finite element contact model conforming to the bone morphology that tracks advancing microcracks. The non‐interpenetration conditions along the crack edges are ensured by penalty constraints of which the parameters are optimised for minimum contact pressure error with respect to the crack orientations. A cohesive crack opening law is implemented in the wake of the crack tips to remain consistent with the progressive tearing of collagen fibrils. The displacement solution is searched by a Newton–Raphson scheme containing a double loop first on the displacements and second on the frictional contact and cohesive condition updates at the crack interfaces. The experimental Dirichlet boundary conditions are acquired by digital image cross‐correlation of bone light microscopy observations and then imported into the model. The local mechanical elastic moduli are measured by nanoindentation and microextensometry. The comparison of the macroscopic stress–strain numerical response with the experiment reveals the existence of narrow diffuse damaged zones near the major cracks where the local stress intensity factors can be calculated. Copyright © 2012 John Wiley & Sons, Ltd.
Graphics processing unit pricing of exotic cross‐currency interest rate derivatives with a foreign exchange volatility skew model
Authors: Dang Duy Minh , Christara Christina C. , Jackson Kenneth R. 
Published: May 2012

SUMMARYWe present a graphics processing unit (GPU) parallelization of the computation of the price of exotic cross‐currency interest rate derivatives via a partial differential equation (PDE) approach. In particular, we focus on the GPU‐based parallel pricing of long‐dated foreign exchange (FX) interest rate hybrids, namely power reverse dual currency (PRDC) swaps with Bermudan cancelable features. We consider a three‐factor pricing model with FX volatility skew, which results in a time‐dependent parabolic PDE in three spatial dimensions. Finite difference methods on uniform grids are used for the spatial discretization of the PDE, and the alternating direction implicit (ADI) technique is employed for the time discretization. We then exploit the parallel architectural features of GPUs together with the Compute Unified Device Architecture framework to design and implement an efficient parallel algorithm for pricing PRDC swaps. Over each period of the tenor structure, we divide the pricing of a Bermudan cancelable PRDC swap into two independent pricing subproblems, each of which can efficiently be solved on a GPU via a parallelization of the ADI timestepping technique. Numerical results indicate that GPUs can provide significant increase in performance over CPUs when pricing PRDC swaps. An analysis of the impact of the FX skew on such derivatives is provided. Copyright © 2012 John Wiley & Sons, Ltd.
The problem of upload competition in peer‐to‐peer systems with incentive mechanisms
Authors: Meulpolder M. , Meester L.E. , Epema D.H.J. 
Published: May 2012

SUMMARYAs peer‐to‐peer (P2P) file‐sharing systems revolve around cooperation, the design of upload incentives has been one of the most important topics in P2P research for more than a decade. Several deployed systems, such as private BitTorrent communities, successfully manage to foster cooperation by banning peers when their sharing ratio becomes too low. Interestingly, recent measurements have shown that such systems tend to have an oversupply instead of an undersupply of bandwidth designers that have been obsessed with since the dawn of P2P. In such systems, the ‘selfish peer’ problem is finally solved, but a new problem has arisen: because peers have to keep up their sharing ratios, they now have to compete to upload. In this paper, we explore this new problem and show how even highly cooperative peers might in the end not survive the upload competition. On the basis of recent measurements of over half a million peers in private P2P communities, we propose and analyze several algorithms for uploader selection under oversupply. Our algorithms enable sustained sharing ratio enforcement and are easy to implement in both existing and new systems. Overall, we offer an important design consideration for the new generation of P2P systems in which selfishness is no longer an issue. Copyright © 2012 John Wiley & Sons, Ltd.
Object exploration in the developing rat: Methodological considerations
Authors: Heyser Charles J. , Ferris Jennifer S. 
Published: May 2012

AbstractThe current study was conducted to characterize the ontogeny of novel object recognition in rats. Initial testing (Experiment 1) was conducted in a square arena and it was observed that 21‐day‐old animals would often pause in the corners, greatly increasing between‐subject variability and performance in this test. Significantly greater object exploration and less variability were obtained using a circular arena. In Experiment 2, we report object exploration in 21, 35, 42, and 90‐day‐old male and female Sprague‐Dawley rats using a circular arena. The results show that measures of locomotor activity, object exploration, and within session habituation of these behaviors were surprisingly similar across all ages. Gender differences in locomotor activity were not observed until 42 days of age. Reliable recognition memory was observed at all ages. It is concluded that the novel object recognition test appears well suited for use in young rats. © 2012 Wiley Periodicals, Inc. Dev Psychobiol 55: 373–381, 2013
Sea snakes rarely venture far from home
Authors: Lukoschek Vimoksalehi , Shine Richard 
Published: May 2012

AbstractThe extent to which populations are connected by dispersal influences all aspects of their biology and informs the spatial scale of optimal conservation strategies. Obtaining direct estimates of dispersal is challenging, particularly in marine systems, with studies typically relying on indirect approaches to evaluate connectivity. To overcome this challenge, we combine information from an eight‐year mark‐recapture study with high‐resolution genetic data to demonstrate extremely low dispersal and restricted gene flow at small spatial scales for a large, potentially mobile marine vertebrate, the turtleheaded sea snake (Emydocephalus annulatus). Our mark‐recapture study indicated that adjacent bays in New Caledonia (<1.15 km apart) contain virtually separate sea snake populations. Sea snakes could easily swim between bays but rarely do so. Of 817 recaptures of marked snakes, only two snakes had moved between bays. We genotyped 136 snakes for 11 polymorphic microsatellite loci and found statistically significant genetic divergence between the two bays (FST= 0.008,P< 0.01). Bayesian clustering analyses detected low mixed ancestry within bays and genetic relatedness coefficients were higher, on average, within than between bays. Our results indicate that turtleheaded sea snakes rarely venture far from home, which has strong implications for their ecology, evolution, and conservation.
Ionothermal Synthesis of the First Luminescent Open‐Framework Manganese Borophosphate with Switchable Magnetic Properties
Authors: Wang Guangmei , Valldor Martin , Lorbeer Chantal , Mudring Anja‐Verena 
Published: May 2012

AbstractA new open‐framework manganese borophosphate, KMnBP2O7(OH)2, has been prepared under ionothermal conditions in the ionic liquid 1‐butyl‐1‐methylpyrrolidinium bromide. Single‐crystal X‐ray diffraction analysis showed that KMnBP2O7(OH)2 [monoclinic, P21/c, a = 6.659(1), b = 12.049(2), c = 9.790(2) Å, β = 109.12(3)°, V = 742.2(3) Å3, and Z = 4] has an unprecedented open‐framework structure. {MnO5(OH)} octahedra and {BO3(OH)} and {PO3(OH)}/{PO4} tetrahedra link to form a 3D framework with distorted eight‐membered‐ring channels along the crystallographic [001] direction. The negative charges of the inorganic framework are balanced by K+ ions located in the channels. At room temperature, KMnBP2O7(OH)2 shows a bright orange‐red luminescence that redshifts with decreasing temperature. The luminescence lifetimes were determined to be 0.17 ms at room temperature and 3.49 ms at 77 K. Below 3 K, d5 Mn2+ of two neighboring, edge‐sharing {MnO5OH}2 units couple antiferromagnetically, and the magnetic state can be best described as a singlet spin system. These singlets continuously turn into triplets when increasing the magnetic field up to 7 T at 2 K due to relatively weak spin–spin coupling through two identical 98.92(6)° Mn–O–Mn superexchange paths, turning the system into a metastable ferromagnetic state.