bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Synthesis, Characterization and Application of Some Nanosized Mixed Metal Oxides as High Heat Resistant Pigments: Ca2CuO3, Ca3Co2O6, and NiSb2O6.
Authors: Fouad Osama A. , Hassan Ali M. , Abd El‐Wahab Hamada , Eldin Adel Mohy , Naser Abdel‐Rahman M. , Wahba Osama A. G. 
Published: September 2012

AbstractCa2CuO3 and Ca3Co2O6 are synthesized by coprecipitation using (NH4)2CO3 from solutions of CaCO3 and CuCO3 or CoCO3 followed by firing of the obtained precipitates at 900 °C.
ChemInform Abstract: Ionic Liquid Promoted Oxidant‐Free Dehydrogenation of Alcohols with Water‐Soluble Ruthenium Nanoparticles in Aqueous Phase.
Authors: Feng Bo , Chen Chen , Yang Hanmin , Zhao Xiuge , Hua Li , Yu Yinyin , Cao Ting , Shi Yu , Hou Zhenshan 
Published: September 2012

AbstractA wide range of aromatic and allylic alcohols is effectively oxidized under optimized conditions to aldehydes or ketones.
ChemInform Abstract: Highly Enantioselective Epoxidation Catalyzed by Cinchona Thioureas: Synthesis of Functionalized Terminal Epoxides Bearing a Quaternary Stereogenic Center.
Authors: Russo Alessio , Galdi Gerardina , Croce Gianluca , Lattanzi Alessandra 
Published: September 2012

AbstractThe asymmetric epoxidation of electron‐poor terminal alkenes is efficiently catalyzed by quinine‐derived bifunctional amine—thiourea catalysts.
ChemInform Abstract: Strong Lewis Acids of Air‐Stable Metallocene Bis(perfluorooctanesulfonate)s as High‐Efficiency Catalysts for Carbonyl‐Group Transformation Reactions.
Authors: Qiu Renhua , Xu Xinhua , Peng Lifeng , Zhao Yalei , Li Ningbo , Yin Shuangfeng 
Published: September 2012

AbstractCationic mononuclear zirconocene and titanocene perfluorooctanesulfonate complexes are successfully applied in various transformation reactions of carbonyl compounds.
ChemInform Abstract: Iron(III)‐Catalyzed Conia—Ene Cyclization of 2‐Alkynic 1,3‐Dicarbonyl Compounds.
Authors: Chan Li Yan , Kim Sunggak , Park Youngchul , Lee Phil Ho 
Published: September 2012

AbstractFeCl3 and Fe(OTf)3 are found to be efficient for the cyclization of 2‐alkynic dicarbonyl compounds to produce cyclopentene, alkylidenecyclopentane, cyclohexene, and alkylidenecyclohexane derivatives.
ChemInform Abstract: Synthesis of 4‐Tosyloxy‐2‐substituted Phenols Using New Solid Pyridinium Salt Supported [Hydroxyl(tosyloxy)iodo]benzene Reagents.
Authors: Yang Bing , Zhang Jizhen , Zhao Dejian , Kuang Hua 
Published: September 2012

AbstractThe pyridinium salt can be easily regenerated by MCPBA and Tos‐OH.
ChemInform Abstract: Umpolung Reactions in an Ionic Liquid Catalyzed by Electrogenerated N‐Heterocyclic Carbenes. Synthesis of Saturated Esters from Activated α,β‐Unsaturated Aldehydes.
Authors: Feroci Marta , Chiarotto Isabella , Orsini Monica , Pelagalli Romina , Inesi Achille 
Published: September 2012

AbstractThe first example of the title reaction is presented by using a green and mild methodology.
ChemInform Abstract: Acid‐Promoted Oxygen‐Atom Transfer from a Novel Dihydroisoquinoline‐Derived Oxaziridine Substituted at Position 1.
Authors: Kammoun Majed , Salem Ridha Ben , Damak Mohamed 
Published: September 2012

AbstractA new isoquinolino‐fused oxaziridine, prepared by MCPBA oxidation of the corresponding imine, is successfully applied as oxygen transfer reagent in the transformation of sulfides (I) to sulfoxides (II).
ChemInform Abstract: Enantioselective Friedel—Crafts Reactions Between Phenols and N‐Tosylaldimines Catalyzed by a Leucine‐Derived Bifunctional Catalyst.
Authors: Li Guo‐Xing , Qu Jin 
Published: September 2012

AbstractThe title reaction between electron‐rich phenols and N‐tosylaldimines is reported.
ChemInform Abstract: First Example of the Interaction of Fullerene C60 with Hydrazoic Acid.
Authors: Akhmetov A. R. , Tuktarov A. R. , Dzhemilev U. M. , Yarullin I. R. , Gabidullina L. A. 
Published: September 2012

AbstractThe first one‐pot synthesis of N‐unsubstituted aziridino‐ and triazolinofullerenes is achieved via cycloaddition of fullerene C60 and hydrazoic acid under thermal as well as photochemical reaction conditions.
ChemInform Abstract: Electrochemically Active Cross‐Linking Reaction for Fluorescent Labeling of Aliphatic Alkenes.
Authors: Kim Shokaku , Hirose Kumi , Uematsu Jumpei , Mikami Yuzuru , Chiba Kazuhiro 
Published: September 2012

AbstractElectrochemical [3 + 2] cyclization of phenolic compounds with various alkenes provides access towards dihydrobenzofuran derivatives as fluorescent probes.
ChemInform Abstract: anti‐Selective Direct Catalytic Asymmetric Aldol Reaction of Thiolactams.
Authors: Sureshkumar Devarajulu , Kawato Yuji , Iwata Mitsutaka , Kumagai Naoya , Shibasaki Masakatsu 
Published: September 2012

AbstractIn the presence of CuMst, the phosphine, and phenol shown in the scheme the thiolactams (I) undergo reaction with a number of aliphatic aldehydes to afford the corresponding aldols with high diastereo‐ and enantioselectivity.
ChemInform Abstract: Synthesis and Application of a Recyclable Ionic Liquid Supported Imidazolidinone Catalyst in Enantioselective 1,3‐Dipolar Cycloaddition.
Authors: Shen Zhi‐Liang , Goh Kau Kiat Kelvin , Wong Cholin Hong An , Loo Wan‐Yi , Yang Yong‐Sheng , Lu Jun , Loh Teck‐Peng 
Published: September 2012

AbstractThe catalyst is prepared in 5 steps and can be reused several times.
ChemInform Abstract: Highly Efficient Enantioselective Three‐Component Synthesis of 2‐Amino‐4H‐chromenes Catalyzed by Chiral Tertiary Amine‐Thioureas.
Authors: Yang Gaosheng , Luo Chongrong , Mu Xiaolong , Wang Tingting , Liu Xin‐Yuan 
Published: September 2012

AbstractAn atom‐economic and straightforward method is used for the preparation of chiral highly functionalized chromenes.
ChemInform Abstract: Tandem Transformations of Nitriles into N‐Heterocyclic Compounds by Electrophilic Trapping of Blaise Reaction Intermediates.
Authors: Kim Ju Hyun , Chun Yu Sung , Shin Hyunik , Lee Sang‐gi 
Published: September 2012

AbstractDifferent tandem transformations of Reformatsky reagents to N‐heterocycles.
ChemInform Abstract: Facile Synthesis of 2,5,7‐Trisubstituted Oxazolo[5,4‐d]pyrimidines via Copper‐Catalyzed Intramolecular C—O Bond Formation.
Authors: Xu Dan , Sun Li‐Ping , You Qi‐Dong 
Published: September 2012

AbstractKey step is an intramolecular C—O cross‐coupling of ortho chloropyrimidine amide via a copper(I)‐mediated cyclization.
ChemInform Abstract: Synthesis of Phenothiazines via Ligand‐Free CuI‐Catalyzed Cascade C—S and C—N Coupling of Aryl ortho‐Dihalides and ortho‐Aminobenzenethiols.
Authors: Dai Chuan , Sun Xiaofei , Tu Xingzhao , Wu Li , Zhan Dan , Zeng Qingle 
Published: September 2012

AbstractAn excellent regioselective synthesis of the title compounds is developed.
ChemInform Abstract: A New Triterpene from Atalantia retusa Merr
Authors: Ragasa Consolacion Y. , Espineli Dinah L. , Mandia Emelina H. , Raga Dennis D. , Don Ming‐Jaw , Shen Chien‐Chang 
Published: September 2012

Abstractisolation, structure elucidation, cytotoxicity and antimicrobial properties of the new triterpene retusenol (I) and some known compounds, e.g. friedelin and dischidiol
ChemInform Abstract: New Triterpenoid Saponins from Stenocereus eruca.
Authors: Kakuta Kazutaka , Koike Takeshi , Kinoshita Kaoru , Ito Satoru , Koyama Kiyotaka , Takahashi Kunio 
Published: September 2012

Abstractisolation and structure elucidation of eight new triterpenoid saponins, namely stellatoside C (Ib) and its methyl ester (Ic), stellatoside D (Id), stellatoside E (Ia), stellatoside B methyl ester (Ie), thurberoside A (II), phillyriside A (III) and treleaseside A (IV)
ChemInform Abstract: Convenient One‐Pot Synthesis of Thiosugars and Their Efficient Conversion to Polyoxygenated Cycloalkenes.
Authors: Zhang Jingjing , Niu Youhong , Cao Xiaoping , Ye Xin‐Shan 
Published: September 2012

AbstractA one‐pot protocol for the synthesis of thiosugars with xylo, ribo, gluco, manno, fuco, and galacto configuration via thioetherification of diols with sodium sulfide is developed.
ChemInform Abstract: Hypercohin A, a New Polycyclic Polyprenylated Acylphloroglucinol Possessing an Unusual Bicyclo[5.3.1]hendecane Core from Hypericum cohaerens.
Authors: Xu Gang , et al. et al. 
Published: September 2012

AbstractCompound (I) shows moderate inhibitory effects on acetylcholinesterase and moderate cytotoxic activity against several human cancer cell lines in vitro.
Recycling of Demolishing Wall Material Consisting of Fine Grained Mineral by Agglomeration
Authors: Schindhelm Stefan , Schnell Alexander , Hennig Manuel , Schwieger Barbara , Müller Anette , Teipel Ulrich 
Published: September 2012

AbstractSteigende Rohstoffpreise machen eine Wiederverwertung von Bau‐ und Abbruchabfällen ökonomisch attraktiv. Jährlich fallen deutschlandweit 50 bis 60 Mio. Tonnen Beton‐ und Mauerwerkbruch an. Durch Zerkleinerung, Formgebung und Erhärtung sollen Leichtgranulate hergestellt werden, die vollständig aus mineralischen Abfällen bestehen. Ein Teilprozess ist hierbei die Formgebung mittels Aufbau‐ oder Pressagglomeration vor der eigentlichen Erhärtung. Es wurden drei Herstellungsvarianten der Agglomeration im Granulierteller, im Intensivmischer und in der Matrizenpresse durchgeführt. Eine ausreichende Transportstabilität wird mit allen drei Verfahren erreicht, jedoch weisen die mittels Intensivmischer bzw. Matrizenpresse hergestellten Grüngranulate eine größere Abriebfestigkeit auf.
Achieving energy efficiency during collective communications
Authors: Sundriyal Vaibhav , Sosonkina Masha , Zhang Zhao 
Published: September 2012

SUMMARYEnergy consumption has become a major design constraint in modern computing systems. With the advent of petaflops architectures, power‐efficient software stacks have become imperative for scalability. Techniques such as dynamic voltage and frequency scaling (called DVFS) and CPU clock modulation (called throttling) are often used to reduce the power consumption of the compute nodes. To avoid significant performance losses, these techniques should be used judiciously during parallel application execution. For example, its communication phases may be good candidates to apply the DVFS and CPU throttling without incurring a considerable performance loss. They are often considered as indivisible operations although little attention is being devoted to the energy saving potential of their algorithmic steps. In this work, two important collective communication operations, all‐to‐all and allgather, are investigated as to their augmentation with energy saving strategies on the per‐call basis. The experiments prove the viability of such a fine‐grain approach. They also validate a theoretical power consumption estimate for multicore nodes proposed here. While keeping the performance loss low, the obtained energy savings were always significantly higher than those achieved when DVFS or throttling were switched on across the entire application run. Copyright © 2012 John Wiley & Sons, Ltd.
Assessing the quality and trustworthiness of citizen science data
Authors: Hunter Jane , Alabri Abdulmonem , van Ingen Catharine 
Published: September 2012

SUMMARYThe Internet, Web 2.0 and Social Networking technologies are enabling citizens to actively participate in ‘citizen science’ projects by contributing data to scientific programmes via the Web. However, the limited training, knowledge and expertise of contributors can lead to poor quality, misleading or even malicious data being submitted. Subsequently, the scientific community often perceive citizen science data as not worthy of being used in serious scientific research—which in turn, leads to poor retention rates for volunteers. In this paper, we describe a technological framework that combines data quality improvements and trust metrics to enhance the reliability of citizen science data. We describe how online social trust models can provide a simple and effective mechanism for measuring the trustworthiness of community‐generated data. We also describe filtering services that remove unreliable or untrusted data and enable scientists to confidently reuse citizen science data. The resulting software services are evaluated in the context of the CoralWatch project—a citizen science project that uses volunteers to collect comprehensive data on coral reef health. Copyright © 2012 John Wiley & Sons, Ltd.
How Sustainability Leaders Communicate Corporate Activities of Sustainable Development
Authors: Guziana Bozena , Dobers Peter 
Published: September 2012

ABSTRACTIn the corporate quest for sustainable development, production‐ and product‐related environmental impacts of a company can form a basis for defining the corporate environmental profile, as well as for defining environmental leaders. Awareness of the production‐ and product‐related dimensions of the environmental profile varied among companies. This paper studied descriptions and reporting of environmental issues among 19 companies ranked as Global Supersector Leaders in 2009/2010 by the Dow Jones Sustainability Index (DJSI). The results show that all of these companies are aware of production‐ and product‐related environmental aspects. There are also examples, both as headings on websites and as sections in sustainability reports, where companies structure their environmental initiatives separately with respect to production (or their own operations) and the product. The paper ends with a proposed model of corporate environmental profile. Copyright © 2012 John Wiley & Sons, Ltd and ERP Environment.
Asymmetric Transfer Hydrogenation of Ketones Catalyzed by Rhenium Complexes with Chiral Ferrocenylphosphane Ligands
Authors: Mejía Esteban , Aardoom Raphael , Togni Antonio 
Published: September 2012

AbstractWe have prepared a series of new rhenium complexes containing chiral ferrocenyldiphosphane ligands of the Josiphos family, starting from commercially available rhenium sources. These new ReV oxido and nitrido complexes, several of which have been characterized by X‐ray crystallography, are air‐ and moisture‐stable and are active catalysts in the asymmetric transfer hydrogenation of ketones using 2‐propanol as the hydrogen source in the presence of substoichiometric amounts of triethylamine (TEA). The reaction proceeds cleanly with good to excellent yields (50–99 %) but with moderate enantioselectivity (up to 58 % ee). A mechanism not involving hydridic species is proposed.
Dynamic Constitutional Hybrid Materials – Confined Guanosine Ribbons within Mesoporous Silica
Authors: Mihai Simona , Dauthier Justine , Le Duc Yann , El Mansouri Abdelsalam , Mehdi Ahmad , Barboiu Mihail 
Published: September 2012

AbstractHydrogen‐bonded guanosine (G) dynamic supramolecular architectures exchange between different polymorphs such as G‐ribbons, G‐quartets and G‐quadruplexes. Oriented mesoporous silica can be used as a scaffolding matrix to orient and to stabilize lipophilic guanosine‐ribbons in confined conditions. The interface between the lipophilic G‐ribbons and the functionalized silica mesopores is based on reversible hydrophobic interactions. This contributes to the high level of adaptability and correlativity of the self‐organization of the supramolecular G‐ribbons and the oriented mesoporous silica systems. Biomimetic‐type hybrids, in which such structures are extremely stable and robust, can be generated by using this strategy.
Domino Benzylic‐Amination–Sonogashira–Heterocyclisation Reaction: Direct Access to Dipyrido[1,2‐a:3′,4′‐d]imidazole Salts
Authors: Henry Nicolas , Thiery Emilie , Petrignet Julien , Halouchi Hassan , Thibonnet Jérôme , Abarbri Mohamed 
Published: September 2012

AbstractA new one‐pot domino process, involving four chemical transformations, for the synthesis of new dipyrido[1,2‐a:3′,4′‐d]imidazole salts in a multicomponent reaction is reported. Various dipyrido[1,2‐a:3′,4′‐d]imidazoles were obtained in moderate to good yields. The scope and limitations of the process and the reaction mechanism are discussed.
Regiochemical Reversals in Nitrosobenzene Reactions with Carbonyl Compounds – α‐Aminooxy Ketone versus α‐Hydroxyamino Ketone Products
Authors: Nelson Donna J. , Kumar Ravi , Shagufta  
Published: September 2012

AbstractThe Lewis acid catalyzed reaction of nitrosobenzene with a ketone can produce an α‐aminooxy ketone or an α‐hydroxyamino ketone; the reaction regiochemistry switches from the latter to the former upon the addition of a Lewis acid or sterically‐hindered solvent. Whereas the latter (C–N bond formation) is easily explained by attack of the enolate α‐carbon at the N atom, the former (C–O bond formation) has been an enigma, with few proposed explanations, and none that explains the simultaneous formation of both products and all the regiochemical reversals. Herein, the regiochemistry reversal is proposed to occur by (1) nucleophile formation governed by hard and soft acids and bases (HSAB) theory, (2) a nucleophilic attack by the enolate O atom at the N atom, followed by (3) a [2,3]‐sigmatropic rearrangement. This mechanistic pathway and HSAB considerations account for the formation of both products and explain the three reported regiochemistry reversals, which are observed upon the introduction of (A) Lewis acid catalyst, (B) AcOH, or (C) solvent bulkiness.
Cavity‐Extended Pillar[5]arenes: Syntheses and Host–Guest Complexation with Paraquat and Bispyridinium Derivatives
Authors: Yu Guocan , Zhang Zibin , He Jiuming , Abliz Zeper , Huang Feihe 
Published: September 2012

AbstractCavity‐extended pillar[5]arenes containing electron‐rich naphthyl groups have been demonstrated to have enhanced binding affinity to linear guests containing electron‐deficient pyridinium units. The importance of size effect, charge density, cooperative effect, and C–H···π interactions were investigated, and these factors play significant roles in the complexation of these host–guest systems.
When background becomes foreground: Toward context‐sensitive evaluation practice
Authors: Rog Debra J. 
Published: September 2012

AbstractThis article aims to bring context from the background into the foreground of our work. Especially in more quantitative, outcome‐focused efforts, context continues to play a character role. Though we recognize that context affects what we do and that it affects the programs and policies we study, the attention often is more implicit than explicit, and more as an afterthought when the work does not go as planned or findings are difficult to interpret. In this article, the goal is to give context more of a leading role by offering a framework for thinking about context and how we can enhance our practice by including an explicit focus on context in our evaluation inquiry. The article describes a strategy for contextsensitive practice that balances attention to context, stakeholder needs, and rigor. © Wiley Periodicals, Inc., and the American Evaluation Association.
What is new in the research on cadmium‐induced stress in plants?
Authors: Azevedo Ricardo A. , Gratão Priscila L. , Monteiro Carolina C. , Carvalho Rogério F. 
Published: September 2012

AbstractCadmium (Cd) is an important metal due to its industrial use but also one of the most dangerous metals because of its accumulation in the environment. This can eventually lead to entrance into the food chain if the Cd is taken up by crop plants used for feeding animals and humans. Thus, a large number of reviews have discussed the many aspects of stress induced by Cd and other metals in a wide range of species. In relation to plants, useful reviews have been published over the years regarding molecular and biochemical aspects of Cd stress. In this minireview, we have concentrated on promising and emerging topics of Cd‐stress research in plants, such as hormonal control of the antioxidant system and interaction between organisms and plants.
Effect of food matrix structure and composition on aroma release during oral processing using in vivo monitoring
Authors: Frank Damian C. , Eyres Graham T. , Piyasiri Udayasika , Delahunty Conor M. 
Published: September 2012

ABSTRACTThe way aroma is released during eating is critical to a food's sensory character, and is largely determined by the structure and composition of the food matrix. The impact of food structure and composition on in vivo volatile release and corresponding perception were systematically characterized using a standardized consumption and breathing protocol with a human panel (n = 8). Everyday foods (n = 12) representing a range of liquid, semi‐solid and solid states, and varying in texture and composition (fat content) were selected. Target volatiles released during eating were measured in exhaled nostril air using a proton transfer reaction mass spectrometer and the corresponding sensory stimulus was rated using continuous time intensity. Release parameters such as the Tmax and area under the concentration curve for pre‐swallow and post‐swallow eating phases were compared across foods. Differences in release and time intensity were measured according to structure – liquid, semi‐solid and solid – as well as composition, such as fat content. Post‐swallow release was dominant in liquids, greater pre‐swallow release was characteristic of solids and semi‐solids released equally in both phases. Systematic differences in Tmax as a result of food structure as well as composition were measured. In general, Tmax increased from liquid to solid and was longer in high fat foods. Inter‐subject variability in volatile across the range of food types is discussed. The data provided insights into the relationship between food structure and composition and volatile release; application of this approach may help guide the development of novel food products. Copyright © 2012 John Wiley & Sons, Ltd.
Oncologic and functional outcome of the preserved eye in malignant sinonasal tumors
Authors: Rajapurkar Mayuri , Thankappan Krishnakumar , Sampathirao Leela Mohan C. S. , Kuriakose Moni Abraham , Iyer Subramania 
Published: September 2012

BackgroundThe purpose of this study was to analyze the oncologic and functional outcomes of the preserved eye in malignant sinonasal tumors with orbital involvement.MethodsIn a retrospective study of 19 consecutive patients who underwent craniofacial resection or maxillectomy with preservation of orbital contents and adjuvant radiotherapy, the oncological outcome in terms of local recurrence and survival was analyzed. The functional outcome in the preserved eye was analyzed for the cases that did not recur in the orbit.ResultsNineteen patients were analyzed for their oncologic and functional outcomes. Fifteen patients underwent immediate reconstruction of the orbital support. Eight patients had local recurrences; 11 patients were disease free at the end of the follow‐up. Squamous cell carcinoma has a high propensity for local recurrences (ie, 5 of 8 local recurrences were squamous cell carcinoma). Sixteen patients, in whom a satisfactory orbital tumor clearance was obtained, remained recurrence free in the orbit. All the preserved eyes retained adequate function after adjuvant radiotherapy.ConclusionsAdequate local control with preserved visual function can be obtained with surgery and adjuvant radiation in appropriately selected malignant sinonasal tumors with orbital involvement. The preserved eye, if reconstructed appropriately, maintains good overall function with acceptable morbidity. © 2012 Wiley Periodicals, Inc. Head Neck 35: 1379–1384, 2013