bluuebunny/crossref_metadata_2025_split huggingface dataset:
ChemInform Abstract: Lanthanum Trichloride (LaCl3): An Efficient Catalyst for Conjugate Addition of Amines to Electron‐Deficient Olefins.
Authors: Narsaiah Akkirala Venkat 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Effect of Base Additives on the Selective Hydrogenolysis of Glycerol over Ru/TiO2 Catalyst.
Authors: Feng Jian , Wang Jinbo , Zhou Yafen , Fu Haiyan , Chen Hua , Li Xianjun 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Synthetic Methodology for the Preparation of N‐Hydroxysulfamides.
Authors: Devanathan Krishnaswamy , Bell Jennifer A. , Wilkins Patricia C. , Jacobs Hollie K. , Gopalan Aravamudan S. 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Efficient One‐Pot Synthesis of Chlorinated Cyclopentenones from Hexachlorocyclopentadiene.
Authors: Ivanova Nadezhda A. , Kislitsina Kseniya S. , Miftakhov Mansur S. 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Rhodium‐Catalyzed Carbonylation of Spiropentanes.
Authors: Matsuda Takanori , Tsuboi Tomoya , Murakami Masahiro 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Electrochemically Induced Aza‐Henry Reaction: A New, Mild, and Clean Synthesis of α‐Nitroamines.
Authors: Rossi Leucio , Bianchi Gabriele , Feroci Marta , Inesi Achille 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Molybdenum Hexacarbonyl and DBU Reduction of Nitro Compounds under Microwave Irradiation.
Authors: Spencer John , Anjum Nazira , Patel Hiren , Rathnam Rajendra P. , Verma Jason 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Highly Efficient Selective Oxidation of Alcohols to Carbonyl Compounds Catalyzed by Ruthenium (III) meso‐Tetraphenylporphyrin Chloride in the Presence of Molecular Oxygen.
Authors: Ji Hong‐Bing , Yuan Qiu‐Lan , Zhou Xian‐Tai , Pei Li‐Xia , Wang Le‐Fu 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: A Facile, One‐Pot Procedure for Forming Diarylimines from Nitroarenes and Benzaldehydes.
Authors: Korich Andrew L. , Hughes Thomas S. 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Studies on Novel Synthetic Methodologies. Part 141. One‐Pot Efficient Synthesis of Cbz‐Protected β‐Amino Ketones: Three‐Component Coupling of Aldehydes, Ketones, and Benzyl Carbamate.
Authors: Das Biswanath , Majhi Anjoy , Chowdhury Nikhil , Reddy Kongara Ravinder , Ravikanth Bommena 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Palladium‐Catalyzed Alkynylcarbonylation of Aryl Iodides with the Use of Mo(CO)6 in the Presence of tBu3P Ligand.
Authors: Iizuka Muneaki , Kondo Yoshinori 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Carbon Dioxide Mediated Catalytic Rearrangement of Propargyl Alcohols into α,β‐Unsaturated Ketones.
Authors: Sugawara Yudai , Yamada Wataru , Yoshida Shunsuke , Ikeno Taketo , Yamada Tohru 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: Regioselective Synthesis of Functionally Hindered α‐Methylstyrenes Through Ring Transformation of 2H‐Pyran‐2‐ones with Mesityl Oxide.
Authors: Kumar Amit , Singh Fateh V. , Goel Atul 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
ChemInform Abstract: 1‐Methylimidazole‐Catalyzed Regioselective Synthesis of Highly Substituted Benzenes.
Authors: Adib Mehdi , Mohammadi Bagher , Mahdavi Mohammad , Abbasi Alireza , Kesheh Mahdi Riazati 
Published: February 2008

AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Chiral molecules with polyhedral T, O, or I symmetry: Theoretical solution to a difficult problem in stereochemistry
Authors: Narasimhan Sri Kamesh , Lu Xiaoying , Luk Yan‐Yeung 
Published: February 2008

AbstractEver since point groups of symmetry have been used to describe molecules after Van't Hoff and Le Bel proposed tetrahedral structures for carbon atoms in 1874, it remains difficult to design chiral molecules with polyhedral symmetry T, O, or I. Past theoretical and experimental studies have mainly accomplished molecular structures that have the conformations for satisfying the T symmetry. In this work, we present a general theoretical approach to construct rigid molecular structures that have permanently the symmetry of T, O, and I. This approach involves desymmetrizaton of the vertices or the edges of Platonic solid‐shaped molecules with dissymmetric moieties. Using density functional theory (DFT) and assisted model building and energy refinement (AMBER) computational methods, the structure, the rigidity, and the symmetry of the molecule are confirmed by assessing the lowest energy conformation of the molecule, which is initially presented in a planar graph. This method successfully builds molecular structures that have the symmetry of T, O, and I. Interestingly, desymmetrization of the edges has a more stringent requirement of rigidity than desymmetrization of the vertices for affording the T, O, or I symmetry. Chirality, 2008. © 2008 Wiley‐Liss, Inc.
A law of large numbers for finite‐range dependent random matrices
Authors: Anderson Greg , Zeitouni Ofer 
Published: February 2008

AbstractWe consider random Hermitian matrices in which distant above‐diagonal entries are independent but nearby entries may be correlated. We find the limit of the empirical distribution of eigenvalues by combinatorial methods. We also prove that the limit has an algebraic Stieltjes transform by an argument based on dimension theory of Noetherian local rings. © 2008 Wiley Periodicals, Inc.
Soluble HLA‐G molecules impair natural killer/dendritic cell crosstalk via inhibition of dendritic cells
Authors: Gros Frédéric , Cabillic Florian , Toutirais Olivier , Maux Amélie Le , Sebti Yasmine , Amiot Laurence 
Published: February 2008

AbstractHLA‐G molecules are known to exert immunosuppressive action on DC maturation and on NK cells, and can in consequence inhibit respectively T cell responses and NK cytolysis. In this study, we show that monocyte‐derived DC, differentiated in the presence of GM‐CSF and IL‐4, are sensitive to soluble (s) HLA‐G molecules during LPS/IFN‐γ maturation as demonstrated by the decrease of CD80 and HLA‐DR expressions and IL‐12 secretion. Moreover, DC pretreated with sHLA‐G were found to activate NK/DC crosstalk less than non‐treated DC. Early activation of NK cells co‐cultured with autologous DC was diminished as assessed by CD69 expression. The IFN‐γ production was impaired whereas a slight inhibition of the NK cell cytotoxicity against Daudi cell line was observed. Since sHLA‐G is expressed in grafts or sites of tumour proliferation, its indirect action on NK cells via DC could constitute a pathway of early inhibition for both innate and specific immune responses.
Polypropylene glycol is a selective binding inhibitor for LTA and other structurally related TLR2 agonists
Authors: Draing Christian , Traub Stephanie , Deininger Susanne , Mang Philippa , Möller Heiko M. , Manso Miguel , Rossi Francois , Morath Siegfried , Hartung Thomas , von Aulock Sonja 
Published: February 2008

AbstractPolypropylene glycol (PPG) is commonly added to bacterial cultures to avoid foaming. However, lipoteichoic acid (LTA) from bacteria grown with PPG lacked cytokine‐inducing potency in human blood. We tested the blocking efficacy of several glycols on the cytokine response to staphylococcal LTA in human blood. PPG 1200 was the most potent inhibitor tested, shown for TNF, IL‐1β, IL‐6, IL‐8, IL‐10 and TGF‐β induction, and displayed no cytotoxic effects. TNF induction by Staphylococcus aureus or by Toll‐like receptor (TLR)2 agonists (di‐ and triacylated lipopeptides and LTA) was also inhibited by PPG 1200, but not that induced by Escherichia coli or TLR4 agonists. In flow cytometric studies, PPG‐carrying nanobeads bound more rhodamine‐labeled LTA than those with glycerol. Additionally, the methyl group peak in the 1H‐NMR of LTA shifted after incubation with increasing PPG 1200 concentrations. Sequential incubation of polystyrene plates with LTA, then PPG 1200 and then blood, with washing steps in between, showed that LTA‐induced TNF release was inhibited. But when PPG 1200 was pre‐incubated with blood that was washed before LTA was added, TNF induction was not repressed, demonstrating that PPG binds LTA and not cellular structures. In summary, PPG 1200 is a novel inhibitor of cytokine induction by TLR2 agonists, which interferes directly with the ligands.
An essential role for transmembrane TNF in the resolution of the inflammatory lesion induced by Leishmania major infection
Authors: Allenbach Cindy , Launois Pascal , Mueller Christoph , Tacchini‐Cottier Fabienne 
Published: February 2008

AbstractTNF is an essential player in infections with Leishmania major, contributing to the control of the inflammatory lesion and, to a lesser degree, to parasite killing. However, the relative contribution of the soluble and transmembrane forms of TNF in these processes is unknown. To investigate the role of transmembrane TNF (mTNF) in the control of L. major infections, mTNF‐knock‐in (mTNFΔ/Δ) mice, which express functional mTNF but do not release soluble TNF, were infected with L. major, and the development of the inflammatory lesion and the immune response was compared to that occurring in L. major‐infected TNF–/– and wild‐type mice. mTNFΔ/Δ mice controlled the infection and resolved their inflammatory lesion as well as wild‐type mice, a process associated with the early clearance of neutrophils at the site of parasite infection. In contrast, L. major‐infected TNF–/– mice developed non‐healing lesions, characterized by an elevated presence of neutrophils at the site of infection and partial control of parasite number within the lesions. Altogether, the results presented here demonstrate that mTNF, in absence of soluble TNF, is sufficient to control infection due to L. major, enabling the regulation of inflammation, and the optimal killing of Leishmania parasites at the site of infection.
Guest‐Inclusion Behavior of Double‐Strand 1D Coordination Polymers Based on N,N′‐Type Schiff Base Ligands
Authors: Wang Qing , Yang Rui , Zhuang Chun‐Feng , Zhang Jian‐Yong , Kang Bei‐Sheng , Su Cheng‐Yong 
Published: February 2008

AbstractFour double‐strand one‐dimensional (1D) coordinationpolymers, namely, {[Ni(N3Py)2(NO3)2]·(C6H6)x·C2H5OH}n (1), [Cd(ImBNN)2(CH3C6H4SO3)2]n (2), {[Co(N3OPy)2(H2O)2](ClO4)2·C6H6·H2O}n (3), and {[Co(N3OPy)2(H2O)2](ClO4)2·(C8H10)x}n (4) were obtained from the assembly of three N,N′‐type Schiff base ligands, 1,4‐bis(3‐pyridyl)‐2,3‐diaza‐1,3‐butadiene (N3Py), 2,5‐bis(4′‐(imidazol‐1‐yl)benzyl)‐3,4‐diaza‐2,4‐hexadiene (ImBNN), and bis[4‐(3‐pyridylmethylenemino)phenoxy]methane (N3OPy), with transition‐metal ions. All complexes were characterized by single‐crystal X‐ray diffraction, X‐ray powder diffraction, and FTIR measurements. The guest‐inclusion behavior of these complexes were investigated by thermogravimetric and X‐ray powder diffraction analyses. The structural relationship between the ligands and the cavity sizes and packing fashions have been discussed to elucidate the distinctive guest‐inclusion behavior of these complexes.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
The EDTA Complex of Oxidoiron(IV) as Realisation of an Optimal Ligand Environment for High Activity of FeO2+
Authors: Bernasconi Leonardo , Baerends Evert Jan 
Published: February 2008

AbstractA prerequisite for the high activity of the FeO2+ moiety as a hydroxylation agent is that its ligand environment stabilizes the 3σ*↑LUMO, which dominates the reactivity of this system. Features in the ligand environment that promote the reactivity of FeO2+ are: weak equatorial ligand field to obtain a quintet ground state that stabilizes the unoccupied 3σ*↑; weak axial ligand field to stabilize the 3σ*↑; a positive overall charge to lower the 3σ*↑. Generalised gradient‐corrected Density Functional Theory (DFT) calculations for the series of oxidoiron compounds of composition [FeO·EDTAHn](n–2)+, with n = 0, 1, 2, 3, 4, show that in particular the complex with n = 4 (charge +2) realises such an environment. Hypothetically, these species may appear as intermediates in the degradation of EDTA and related organics in aerated aqueous FeII/EDTA solutions. A strong dependence of the C–H activation properties in the hydroxylation of methane on the overall charge of yielding the lowest C–H dissociation barriers. In the n = 4 case, C–H dissociation occurs with anactivation energy of ca. 7 kJ mol–1, which is below the value computed for the corresponding reaction catalysed by [FeO(H2O)5]2+ (23 kJ mol–1). This enhanced catalytic activity is explained by EDTAHn(2–n)– satisfying the listed requirements for an effective ligand, in particular by the very weak axial coordination by the EDTA nitrogen atoms due to large Fe–N distances.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Investigation on Condensing Agents for Phosphinate Ester Formation with Nucleoside 5′‐Hydroxyl Functions
Authors: Winqvist Anna , Strömberg Roger 
Published: February 2008

AbstractCondensation of a uridine 3′‐deoxy‐3′‐C‐methylenephosphinate with thymidine and guanosine derivatives to form methylenephosphinate esters was investigated. A number of different condensing agents were compared, and these include pivaloyl chloride, triisopropylbenzenesulfonyl chloride (TPS‐Cl), phosphonium and uronium derivatives, numerous chlorophosphates and bis(2‐oxo‐3‐oxazolidinyl)phosphinic chloride (OXP). The phosphonium derivatives gave slow condensations or oxidative side reactions (hydroxybenzotriazole derivatives) during preactivation of the methylenephosphinate. Pivaloyl chloride gave long coupling times, and competing 5′‐O‐pivaloylation was detected. TPS‐Cl gave rapid condensation but also rapid oxidation of the product. Most chlorophosphates gave competing 5′‐O‐phosphorylation of the nucleoside component, as well as base phosphorylation. However, 2‐chloro‐5,5‐dimethyl‐2‐oxo‐1,3,2‐dioxaphosphorinane (DMOCP) gave a rather efficient formation of dinucleoside methylenephosphinates at a decent rate. However, O6‐protection of guanines could become necessary with this reagent, since upon extended reaction time traces of O6‐phosphorylation were detected even with a low concentration (60 mM) of DMOCP (2 equiv. to phosphinate). Bis(2‐oxo‐3‐oxazolidinyl)phosphinic chloride (OXP) can, unlike DMOCP, be used in nearly equimolar amounts to phosphinate. Under such conditions OXP gives virtually quantitative condensation at a rate comparable to that of 2 equiv. of DMOCP and with no side reactions detected. We could also not detect any decomposition of OXP‐preactivated phosphinate. Nucleophilic catalysts, more powerful than pyridine (N‐methylimidazole, iodide and 4‐methoxypyridine), accelerated the reactions with OXP, but preactivation in the absence of the 5′‐OH component led to decomposition of the activated phosphinate.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Combined Metalation–Cross Coupling Strategies: A Synthesis of Schumanniophytine by a Key Biaryl O‐Carbamate Remote Anionic Fries Rearrangement
Authors: Macklin Todd K. , Reed Mark A. , Snieckus Victor 
Published: February 2008

AbstractA short synthesis of the alkaloid schumanniophytine (1) starting from simple building blocks and involving directed ortho metalation (DoM), Suzuki–Miyaura cross coupling, and a key ortho‐silicon‐induced O‐carbamate remote anionic Fries rearrangement (3) is described. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Strengthening and rehabilitation of RC beam–column joints using carbon‐FRP jacketing and epoxy resin injection
Authors: Karayannis Chris G. , Sirkelis George M. 
Published: February 2008

AbstractThe scope of this study is to present results of an experimental investigation on the behaviour of critical external beam–column joints repaired or/and strengthened with a combination of epoxy resin injections and carbon‐fibre‐reinforced plastics (C‐FRP) sheets and to extract useful and practical conclusions. The experimental program comprises 12 external beam–column joint connection subassemblages tested in cyclic loading. From the observed responses of the examined specimens it can be deduced that the technique of epoxy resin injections is appropriate for the total rehabilitation of the joints seismic capacity, since no damages have been observed at the joint area of the specimens after the repair. The combination of this technique with the use of C‐FRP sheets leads to a significant improvement of the loading capacity, the energy absorption and the ductility and finally it leads to improved type of damages compared with the damage modes of the specimens during the initial loading. Shortcomings of the application of C‐FRP sheets for practical use are also pointed out. Copyright © 2008 John Wiley & Sons, Ltd.
The creative brain: Investigation of brain activity during creative problem solving by means of EEG and FMRI
Authors: Fink Andreas , Grabner Roland H. , Benedek Mathias , Reishofer Gernot , Hauswirth Verena , Fally Maria , Neuper Christa , Ebner Franz , Neubauer Aljoscha C. 
Published: February 2008

AbstractCortical activity in the EEG alpha band has proven to be particularly sensitive to creativity‐related demands, but its functional meaning in the context of creative cognition has not been clarified yet. Specifically, increases in alpha activity (i.e., alpha synchronisation) in response to creative thinking can be interpreted in different ways: As a functional correlate of cortical idling, as a sign of internal top‐down activity or, more specifically, as selective inhibition of brain regions. We measured brain activity during creative thinking in two studies employing different neurophysiological measurement methods (EEG and fMRI). In both studies, participants worked on four verbal tasks differentially drawing on creative idea generation. The EEG study revealed that the generation of original ideas was associated with alpha synchronisation in frontal brain regions and with a diffuse and widespread pattern of alpha synchronisation over parietal cortical regions. The fMRI study revealed that task performance was associated with strong activation in frontal regions of the left hemisphere. In addition, we found task‐specific effects in parietotemporal brain areas. The findings suggest that EEG alpha band synchronisation during creative thinking can be interpreted as a sign of active cognitive processes rather than cortical idling. Hum Brain Mapp, 2009. © 2008 Wiley‐Liss, Inc.
Brain responses to auditory and visual stimulus offset: Shared representations of temporal edges
Authors: Herdener Marcus , Lehmann Christoph , Esposito Fabrizio , di Salle Francesco , Federspiel Andrea , Bach Dominik R. , Scheffler Klaus , Seifritz Erich 
Published: February 2008

AbstractEdges are crucial for the formation of coherent objects from sequential sensory inputs within a single modality. Moreover, temporally coincident boundaries of perceptual objects across different sensory modalities facilitate crossmodal integration. Here, we used functional magnetic resonance imaging in order to examine the neural basis of temporal edge detection across modalities. Onsets of sensory inputs are not only related to the detection of an edge but also to the processing of novel sensory inputs. Thus, we used transitions from input to rest (offsets) as convenient stimuli for studying the neural underpinnings of visual and acoustic edge detection per se. We found, besides modality‐specific patterns, shared visual and auditory offset‐related activity in the superior temporal sulcus and insula of the right hemisphere. Our data suggest that right hemispheric regions known to be involved in multisensory processing are crucial for detection of edges in the temporal domain across both visual and auditory modalities. This operation is likely to facilitate cross‐modal object feature binding based on temporal coincidence. Hum Brain Mapp, 2009. © 2008 Wiley‐Liss, Inc.