bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Crystal Structure and Magnetic Properties of Titanium‐Based CuTi2‐xMxS4 and CuCr2‐xTixSe4 Chalcospinels.
Authors: Barahona P. , Galdamez A. , Lopez‐Vergara F. , Manriquez V. , Pena O. 
Published: May 2014

AbstractCuTi2‐xMxS4 (M: Fe, Mn, Co; x = 0.3, 0.5) and CuCr2‐xTixSe4 (x = 0.3, 0.5, 0.7) chalcospinels are prepared by solid state reactions of stoichiometric amounts of the elements (quartz ampules, 850 °C, 6 d).
ChemInform Abstract: Synthesis and Crystal Structure of [B12]2[CBC][C2]Mg1.42, a New Modification of B25C4Mg1.42.
Authors: Ponomarev Vasilii I. , Konovalikhin Sergei V. , Kovalev Ivan D. , Vershinnikov Vladimir I. , Borovinskaya Inna P. 
Published: May 2014

AbstractThe new title modification of B25C4Mg1.42 is synthesized from powders of magnesium, boron oxide, carbon black, and magnesium perchlorate by magnesiothermic self‐propagating high‐temperature synthesis.
ChemInform Abstract: Syntheses, Characterization and Nonlinear Optical Properties of a Bismuth Subcarbonate Bi2O2CO3.
Authors: Huang Hongwei , Tian Na , Jin Shifeng , Zhang Yihe , Wang Shuobo 
Published: May 2014

AbstractThe nonlinear optical (NLO) material Bi2O2CO3 is hydrothermally prepared in nanocrystalline form from Bi(NO3)3 and urea in 5:8 molar ratio (autoclave, 180 °C, 24 h).
ChemInform Abstract: High‐Pressure U3O8 with the Fluorite‐Type Structure.
Authors: Zhang F. X. , Lang M. , Wang J. W. , Li W. X. , Sun K. , Prakapenka V. , Ewing R. C. 
Published: May 2014

AbstractA dense fluorite‐like form of U3O8 is prepared from α‐U3O8 at pressures greater than 8.1 GPa.
ChemInform Abstract: Regiodivergent Heterocyclization: A Strategy for the Synthesis of Substituted Pyrroles and Furans Using α‐Formyl Ketene Dithioacetals as Common Precursors.
Authors: Wu Ting , Pan Ling , Xu Xianxiu , Liu Qun 
Published: May 2014

AbstractThe reaction of dithioacetals (I) with nitriles (II) followed by a zinc‐mediated one‐pot reaction of the isolable intermediate (V) leads to 5‐ethylthiopyrroles (III), whilst the copper‐mediated reaction of the intermediate (V) affords 4‐ethylthiocarbonylpyrroles (IV) via a second isolable intermediate (VI).
ChemInform Abstract: Room‐Temperature Pd‐Catalyzed C—H Chlorination by Weak Coordination: One‐Pot Synthesis of 2‐Chlorophenols with Excellent Regioselectivity.
Authors: Sun Xiuyun , Sun Yonghui , Zhang Chao , Rao Yu 
Published: May 2014

AbstractThis halogenation protocol requires no air‐ and moisture‐proof conditions and is successfully applied even to the chlorination of carbamate‐protected estrone.
ChemInform Abstract: Bis‐N‐Heterocyclic Carbene (NHC) Stabilized η6‐Arene Iron(0) Complexes: Synthesis, Structure, Reactivity, and Catalytic Activity.
Authors: Blom Burgert , Tan Gengwen , Enthaler Stephan , Inoue Shigeyoshi , Epping Jan Dirk , Driess Matthias 
Published: May 2014

AbstractThe newly designed complex FAC represents the first example of an NHC‐stabilized iron (0) arene complex which efficiently catalyzes the reduction of various amides into amines using Ph2SiH2 as a hydride source.
ChemInform Abstract: Evaluation of a Cyclopentane‐Based γ‐Amino Acid for the Ability to Promote α/γ‐Peptide Secondary Structure.
Authors: Giuliano Michael W. , Maynard Stacy J. , Almeida Aaron M. , Reidenbach Andrew G. , Guo Li , Ulrich Emily C. , Guzei Ilia A. , Gellman Samuel H. 
Published: May 2014

AbstractThe asymmetric synthesis of a new type of cyclic γ‐amino acids namely (1R,2R)‐2‐aminomethyl‐1‐cyclopentane carboxylic acid (AMCP, VII) is reported.
ChemInform Abstract: Iodine‐Catalyzed Three‐Component Oxysulfenylation of Alkenes with Sulfonyl Hydrazides and Alcohols.
Authors: Yang Fu‐Lai , Wang Fu‐Xiang , Wang Ting‐Ting , Wang Yi‐Jie , Tian Shi‐Kai 
Published: May 2014

AbstractThe three‐component oxysulfenylation fails with acyclic 1,2‐disubstituted alkenes such as (E)‐stilbene and 2‐methyl‐1‐phenyl‐1‐propene.
ChemInform Abstract: Synthesis and Structure of an Air‐Stable Binuclear Complex of Bis(ethylcyclopentadienyl)zirconium Perfluorooctanesulfonate and Its Catalytic Application in One‐Pot Three‐Component Aza‐Friedel—Crafts Reactions.
Authors: Zhang Xiaohong , Zhang Xingsong , Li Ningbo , Xu Xinhua , Qiu Renhua , Yin Shuangfeng 
Published: May 2014

AbstractThe title catalyst is successfully applied to the aza‐Friedel—Crafts reaction of indoles, aldehydes, and aniline to give the corresponding products in good yields.
ChemInform Abstract: Asymmetric Synthesis of Pyrroloindolones by N‐Heterocyclic Carbene Catalyzed [2 + 3] Annulation of α‐Chloroaldehydes with Nitrovinylindoles.
Authors: Ni Qijian , Zhang Huan , Grossmann Andre , Loh Charles C. J. , Merkens Carina , Enders Dieter 
Published: May 2014

AbstractThe reaction can be scaled up.
ChemInform Abstract: A Magnetoclick Imidazolidinone Nanocatalyst for Asymmetric 1,3‐Dipolar Cycloadditions.
Authors: Pagoti Sreenivasarao , Dutta Debasish , Dash Jyotirmayee 
Published: May 2014

AbstractThe isoxazolidines are formed with high endo diastereoselectivity and enantioselectivity.
ChemInform Abstract: 4‐Trifluoroacetyl‐2‐phenyloxazol‐5‐one: Versatile Template for Synthesis of Trifluoromethyl‐Substituted Heterocycles.
Authors: Saijo Ryosuke , Kurihara Ken‐ichi , Kawase Masami 
Published: May 2014

AbstractDerivative (XIII) is starting material for (I) as well.
ChemInform Abstract: CuI‐Catalyzed Aerobic Oxidative α‐Aminaton Cyclization of Ketones to Access Aryl or Alkenyl‐Substituted Imidazoheterocycles.
Authors: Zhang Yuanfei , Chen Zhengkai , Wu Wenliang , Zhang Yuhong , Su Weiping 
Published: May 2014

AbstractThis protocol is compatible with a broad range of functional groups.
ChemInform Abstract: [2 + 2 + 2] Cycloadditions of Siloxy Alkynes with 1,2‐Diazines: From Reaction Discovery to Identification of an Antiglycolytic Chemotype.
Authors: Montavon Timothy J. , Tuerkmen Yunus E. , Shamsi Noumaan A. , Miller Christopher , Sumaria Chintan S. , Rawal Viresh H. , Kozmin Sergey A. 
Published: May 2014

AbstractSimple pyridazines are unreactive under the investigated conditions.
ChemInform Abstract: Rhodium(II)‐Catalyzed Stereoselective Synthesis of Allylsilanes.
Authors: Guptill David M. , Cohen Carolyn M. , Davies Huw M. L. 
Published: May 2014

AbstractThe reaction proceeds via silyl‐directed intramolecular C—H functionalization yielding a β‐lactone intermediate followed by the decarboxylation.
ChemInform Abstract: Silylation‐Based Kinetic Resolution of α‐Hydroxy Lactones and Lactams.
Authors: Clark Robert W. , Deaton T. Maxwell , Zhang Yan , Moore Maggie I. , Wiskur Sheryl L. 
Published: May 2014

AbstractTriphenylsilyl chloride in combination with catalytic amounts of (‐)‐benzotetramisole (BAM) allows the non enzymatic kinetic resolution of α‐hydroxy esters and amides.
ChemInform Abstract: Angumycinones A (Ia) and B (Ib), Two New Angucyclic Quinones from Streptomyces sp. KMC004 Isolated from Acidic Mine Drainage.
Authors: Park Hyun Bong , Lee Jae Kyun , Lee Kang Ro , Kwon Hak Cheol 
Published: May 2014

AbstractAngumycinone B (Ib) exhibits antimicrobial activity against Micrococcus luteus, Enterococcus hirae, and methicillin‐resistant Staphylococcus aureus (MRSA).
ChemInform Abstract: Expeditious Synthesis of the Marine Natural Products Prepolycitrin A and Polycitrins A and B Through Heck Arylations.
Authors: Canto Karen , da Silva Ribeiro Rodrigo , Biajoli Andre F. P. , Correia Carlos Roque D. 
Published: May 2014

AbstractA concise synthesis of the marine natural product prepolycitrin A (I) and the total syntheses of the marine alkaloids polycitrins A (IIa) and B (IIb) in overall yields of 37% and 47%, respectively are reported.
ChemInform Abstract: [4 + 2] vs [3 + 2] Annulations in the Nickel‐ and Cobalt‐Catalyzed Reaction of ortho‐Haloimines with Alkynes: Differential Reactivity Towards the Synthesis of Isoquinolines and Aminoindenes
Authors: Mannathan Subramaniyan , Cheng Chien‐Hong 
Published: May 2014

AbstractReview: [17 refs.
Recycling of Polymers: A Review
Authors: Ignatyev Igor A. , Thielemans Wim , Vander Beke Bob 
Published: May 2014

AbstractPlastics are inexpensive, easy to mold, and lightweight. These and many other advantages make them very promising candidates for commercial applications. In many areas, they have substantially suppressed traditional materials. However, the problem of recycling still is a major challenge. There are both technological and economic issues that restrain the progress in this field. Herein, a state‐of‐art overview of recycling is provided together with an outlook for the future by using popular polymers such as polyolefins, poly(vinyl chloride), polyurethane, and poly(ethylene terephthalate) as examples. Different types of recycling, primary, secondary, tertiary, quaternary, and biological recycling, are discussed together with related issues, such as compatibilization and cross‐linking. There are various projects in the European Union on research and application of these recycling approaches; selected examples are provided in this article. Their progress is mirrored by granted patents, most of which have a very limited scope and narrowly cover certain technologies. Global introduction of waste utilization techniques to the polymer market is currently not fully developed, but has an enormous potential.
Seaweed‐Derived Heteroatom‐Doped Highly Porous Carbon as an Electrocatalyst for the Oxygen Reduction Reaction
Authors: Song Min Young , Park Hyean Yeol , Yang Dae‐Soo , Bhattacharjya Dhrubajyoti , Yu Jong‐Sung 
Published: May 2014

AbstractWe report the template‐free pyrolysis of easily available natural seaweed, Undaria pinnatifida, as a single precursor, which results in “seaweed carbon” (SCup). Interestingly, thus‐obtained SCup not only contains heteroatoms such as nitrogen and sulfur in its framework, but it also possesses a well‐developed porous structure with high surface area. The heteroatoms in SCup originate from the nitrogen‐ and sulfur‐containing ingredients in seaweed, whereas the porosity is created by removal of salts inherently present in the seaweed. These essential and fundamental properties make seaweed a prime choice as a precursor for heteroatom‐containing highly porous carbon as a metal‐free efficient electrocatalyst. As‐synthesized SCup showed excellent electrocatalytic activity in the oxygen reduction reaction (ORR) in alkaline medium, which can be addressed in terms of the presence of the nitrogen and sulfur heteroatoms, the well‐developed porosity, and the electrical conductivity in the carbon framework. The pyrolysis temperature was a key controlling parameter that determined the trade‐off between heteroatom doping, surface properties, and electrical conductivity. In particular, SCup prepared at 1000 °C showed the best ORR performance. Additionally, SCup exhibited enhanced durability and methanol tolerance relative to the state of the art commercial Pt catalyst, which demonstrates that SCup is a promising alternative to costly Pt‐based catalysts for the ORR.
A topology preserving cluster‐based channel assignment for wireless mesh networks
Authors: Athota Kavitha , Negi Atul 
Published: May 2014

SummaryWireless Mesh Networks (WMN) with multiple radios and multiple channels are expected to resolve the capacity limitation problem of simpler wireless networks. However, optimal WMN channel assignment (CA) is NP complete, and it requires an optimal mapping of available channels to interfaces mounted over mesh routers. Acceptable solutions to CA must minimize network interference and maximize available network throughput. In this paper, we propose a CA solution called as cluster‐based channel assignment (CBCA). CBCA aims at minimizing co‐channel interference yet retaining topology through non‐default CA. Topology preservation is important because it avoids network partitions and is compatible with single‐interface routers in the network. A ‘non‐default’ CA solution is desired because it uses interfaces over different channels and reduces medium contention among neighbors. To the best of our knowledge, CBCA is a unique cluster‐based CA algorithm that addresses topology preservation using a non‐default channel approach. The main advantage of CBCA is it runs in a distributed manner by allowing cluster heads to perform CA independently. CBCA runs in three stages, where first the WMN nodes are partitioned into clusters. The second stage performs binding of interfaces to neighbors and third stage performs CA. The proposed algorithm improves over previous work because it retains network topology and minimizes network interference, which in turn improves available network throughput. Further, when compared with two other CBCA algorithms, CBCA provides better performance in terms of improved network interference, throughput, delay, and packet delivery ratios when tested upon network topologies with various network densities and traffic loads. Copyright © 2014 John Wiley & Sons, Ltd.
Secured routing in wireless sensor networks using fault‐free and trusted nodes
Authors: Devanagavi Geetha D. , Nalini N. , Biradar Rajashekhar C. 
Published: May 2014

SummaryWireless sensor network (WSN) should be designed such that it is able to identify the faulty nodes, rectify the faults, identify compromised nodes from various security threats, and transmit the sensed data securely to the sink node under faulty conditions. In this paper, we propose an idea of integrating fault tolerance and secured routing mechanism in WSN named as fault tolerant secured routing: an integrated approach (FASRI) that establishes secured routes from source to sink node even under faulty node conditions. Faulty nodes are identified using battery power and interference models. Trustworthy nodes (non‐compromised) among fault‐free nodes are identified by using agent‐based trust model. Finally, the data are securely routed through fault‐free non‐compromised nodes to sink. Performance evaluation through simulation is carried out for packet delivery ratio, hit rate, computation overhead, communication overhead, compromised node detection ratio, end‐to‐end delay, memory overhead, and agent overhead. We compared simulation results of FASRI with three schemes, namely multi‐version multi‐path (MVMP), intrusion/fault tolerant routing protocol (IFRP) in WSN, and active node‐based fault tolerance using battery power and interference model (AFTBI) for various measures and found that there is a performance improvement in FASRI compared with MVMP, IFRP, and AFTBI. Copyright © 2014 John Wiley & Sons, Ltd.
“I'm concerned – What Do I Do?” recognition and management of disordered eating in fitness center settings
Authors: Bratland‐Sanda Solfrid , Sundgot‐Borgen Jorunn 
Published: May 2014

ABSTRACTObjectiveTo examine group fitness instructors' knowledge and attitudes toward identification and management of disordered eating (DE).MethodGroup fitness instructors representing the three largest fitness center companies in Norway (n = 837, response rate: 57%) completed a questionnaire through Questback (www.questback.com). The questionnaire contained items regarding gender, age, educational background, exercise behavior, and knowledge of recognition and response to DE.ResultsEighty‐nine percent of the respondents reported knowledge about symptoms of DE, 29% was classified with adequate DE knowledge skills. Forty‐nine percent of the instructors reported current concern about DE among one or more members, 47% reported knowledge about how to recognize and respond to DE, and 37% reported knowledge about their fitness center's guidelines for approaching DE concerns. The level of formal education in sports and exercise, and a history of self‐reported eating disorder, but not fitness instructor experience, were explanatory factors for knowledge about DE symptoms. Both exercise specific educational level and instructor experience were explanatory variables for knowledge about recognition of and response to DE concerns.DiscussionImplications of the findings include a need for increased confidence among group fitness instructors regarding how to approach DE concerns, increased awareness of excessive/compulsive exercise as a symptom of DE, and enhanced dissemination of existing guidelines for managing DE concerns among members and/or staff. © 2014 Wiley Periodicals, Inc. (Int J Eat Disord 2015; 48:415–423)
Nonreciprocal Propagation Characteristics of 526‐GHz Submillimeter Wave in Surface Waveguide Utilizing Solid‐State Plasma
Authors: Yodokawa Shinichi , Obunai Tetsuo , Kurabayashi Toru 
Published: May 2014

SUMMARYThe temperature and magnetic field dependence of 526‐GHz submillimeter wave propagation characteristics in surface waveguide utilizing an n‐InSb slab as plasma material have been studied experimentally and theoretically. The results of theoretical analysis indicate that a surface wave resonance occurs and nonreciprocity of more than 27 dB/mm appears in the transmission in an applied magnetic field of 0.2 T at 77 K, and that at temperatures above 180 K, increases with increasing temperature. Experimentally observed results are in qualitative agreement with theoretical predictions. These findings indicate the possibility of achieving nonreciprocal devices in a surface waveguide consisting of an n‐InSb slab.
Fast Search Method for Audio Fingerprinting Systems Based on Query Multiplexing
Authors: Xiao Qingmei , Daito Yusaku , Matsumoto Kazuyuki , Suzuki Motoyuki , Kita Kenji 
Published: May 2014

SUMMARYIn music information retrieval, a huge search space has to be explored because a query audio clip can start at any position of any music in the database, and also a query is often corrupted by highly significant noise and distortion. Audio fingerprints have attracted much attention recently for providing compact representation of the perceptually relevant parts of audio signals. In this paper, we propose an extremely fast method of exploring a huge Hamming space for audio fingerprinting systems. The effectiveness of our method has been evaluated by experiments using databases of 8740 real songs and 800 artificially corrupted and 268 real queries.
High‐Quality Panoramic Image Generation Using Multiple PAL Images
Authors: Shibata Keiji , Araki Satoshi , Maeda Kei , Horita Yuukou 
Published: May 2014

SUMMARYVideo surveillance using intelligent camera systems is widely used in many fields such as traffic control, driving assistance, and surgery. But image acquisition of a large field of view for video surveillance makes infeasible the use of multiple camera systems or mechanically controlled cameras. To solve this problem, an omnidirectional camera system using a panoramic annular lens may be used, with many advantages such as compactness and the lack of a need for calibration. Nevertheless, the low spatial resolution of the angle of elevation for the vertical direction of images captured using PAL may incur drawbacks such as quality degradation of images after panoramic expansion. To overcome these disadvantages, a high‐quality panoramic image generation method is required. Therefore, we propose a high‐quality panoramic image generation method using multiple panoramic annular lens images. By synthesizing multiple PAL images at different zoom rates, we can obtain fine quality panoramic images.
Syntheses, Characterization, and Magneto–Structural Analyses in μ1,3‐Acetato‐Bridged Tetracopper(II) and μ1,3‐ and μ1,1,3‐Acetato‐Bridged Pentanickel(II) Clusters
Authors: Das Sudhanshu , Sorace Lorenzo , Guha Averi , Sanyal Ria , Kara Hulya , Caneschi Andrea , Zangrando Ennio , Das Debasis 
Published: May 2014

AbstractTwo pentanuclear NiII complexes, [Ni5(L1)2(CH3COO)6(OH)2(MeOH)2] (1) and [Ni5(L2)2(CH3COO)6(OH)2(H2O)2] (2), and one tetranuclear CuII complex, [Cu4(L3)2(CH3COO)4(O)] (3), have been synthesized from phenol‐based “end‐off” compartmental ligands HL1 to HL3 {HL1 = 2,6‐bis[ethyl(2‐thienyl)iminomethyl]‐4‐tert‐butylphenol; HL2 = 2,6‐bis[ethyl(2‐thienyl)iminomethyl]‐4‐chlorophenol and HL3 = 2,6‐bis[ethyl(2‐thienyl)iminomethyl]‐4‐methylphenol, respectively}. The complexes have been structurally characterized and their magnetic properties have been investigated within the temperature range 2.2–300 K. Complexes 1 and 2 comprise two dinuclear [Ni2L2] units linked to a central Ni ion by bridging μ3‐hydroxo groups. The cluster is stabilized by syn‐syn‐μ1,3‐bridging and μ1,1,3‐bridging acetate anions. The structural analysis of 3 revealed two crystallographically independent complexes that consisted of a tetrahedron of CuII ions connected to a central μ4‐oxo species and further bridged by four acetate groups along four of the six edges of the Cu4 core. The other two edges are occupied by μ‐phenoxo bridges from the deprotonated L3 ligand. Magnetic investigations revealed both ferromagnetic and antiferromagnetic interactions in 1 and 2 with single‐ion zero‐field splitting of magnitude comparable to exchange interactions, and strong antiferromagnetic interactions in 3.
Synthesis and Characterization of New Ferrocene‐Containing Ionic Liquids
Authors: Gharib Bhasem , Hirsch Andreas 
Published: May 2014

AbstractA series of several new families of ferrocene‐containing imidazolium salts were synthesized by etherification of ferrocene methanol, acylation of ferrocene, and amide coupling of ferrocene carboxylic acid. The etherification was achieved by an acid‐catalyzed procedure and very good yields of between 86–93 % were obtained. Next to the nature of the linkage itself, the lengths of the alkyl chains linking the ferrocenyl moiety and the imidazolium group and the nature of the counterions were also varied. Interestingly, a γ‐effect can be observed for the ether compounds but this effect was only visible in 13C NMR spectroscopy. These new redox‐active ionic liquids were fully characterized by FTIR, 1H, 19F, and 13C NMR spectroscopy, and by MS, HRMS and elemental analysis.
Highly sensitive detection of cancer cells based on the DNA barcode assay and microcapillary electrophoretic analysis
Authors: Chung Soyi , Cho Minkyung , Hwan Jung Jae , Seok Seo Tae 
Published: May 2014

Electrophoresis 2014, 35, 1504–1508. DOI: 10.1002/elps.201400001Combination of DNA biobarcode assay with micro‐capillary electrophoretic analysis on a chip allows us to perform breast and colorectal cancer cell detection with high sensitivity, multiplexity, and accuracy.
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Flexibility Optimization of a Hexapod Machine Tool
Authors: Henninger Christoph , Kübler Lars , Eberhard Peter 
Published: May 2014

AbstractLightweigth structures like Stuart platforms for manufacturing processes and space application require low flexibility in order to guarantee high motion accuracy. In this paper two methods of flexibility optimization are presented and applied to design variants of a hexapod machine tool. The first one is based on a multibody system simulation (MBS). Here, the hexapod is modeled as a rigid multibody system under consideration of joint elasticities. Actuator amplitudes in the links associated with desired end‐effector trajectories are computed by inverse kinematics. Hence, dynamic forces and torques are not considered and, as there is no closed‐loop control realized so far in the model and the built machine, the actual rotational and translational positions of the end‐effector deviate from the desired pose due to machining loads. These deviations serve as objective functions during the optimization. Further, the obtained results are verified by considering the linearized elastostatic behavior. As a second method, a more general optimization approach based on the tangential stiffness matrix is introduced. Here, the flexibility behavior of the machine is optimized considering the whole workspace. The results are then compared with the results from the MBS‐based optimizations which consider only the poses on a sample trajectory. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)