bluuebunny/crossref_metadata_2025_split huggingface dataset:
Gas and stars in compact (young) radio sources
Authors: Morganti R. , Emonts B. , Holt J. , Tadhunter C. , Oosterloo T. , Struve C. 
Published: February 2009

AbstractGas can be used to trace the formation and evolution of galaxies as well as the impact that the nuclear activity has on the surrounding medium. For nearby compact radio sources, we have used observations of neutral hydrogen – that we detected in emission distributed over very large scales – combined with the study of the stellar population and deep optical images to investigate the history of the formation of their host galaxy and the triggering of the activity. For more distant and more powerful compact radio sources, we have used optical spectra and H I – in absorption – to investigate the presence of fast outflows that support the idea that compact radio sources are young radio loud AGN observed during the early stages of their evolution and currently shredding their natal cocoons through extreme circumnuclear outflows. We will review the most recent results obtained from these projects (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Relationship between the [O III] λ 5007 line and 5 GHz radio emission
Authors: Labiano A. 
Published: February 2009

AbstractI have compiled observations of [O III] λ 5007 line and 5 GHz radio emission for a large sample of GPS, CSS and FR sources. Several properties were studied and compared. The most relevant findings are that the FWHM and the luminosity of the [O III] λ 5007 line are correlated with the size of the radio source. I present the data and discuss the correlations, with special focus on jet‐host interaction, triggering and enhancing of [O III] λ 5007 emission (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Fate of baby radio galaxies: Dead or alive?
Authors: Kawakatu N. , Nagai H. , Kino M. 
Published: February 2009

AbstractIn order to reveal the long‐term evolution of relativistic jets in active galactic nuclei (AGNs), we examine the dynamical evolution of variously‐sized radio galaxies [i.e., compact symmetric objects (CSOs), medium‐size symmetric objects (MSOs), Fanaroff‐Riley type II radio galaxies (FRIIs)]. By comparing the observed relation between the hot spot size and the linear size of radio source with a coevolution model of hot spot and cocoon, we find that the advance speed of hot spots and lobes inevitably show the deceleration phase (CSO‐MSO phase) and the acceleration phase (MSO‐FRII phase). The deceleration is caused by the growth of the cross‐sectional area of the cocoon head. Moreover, by comparing the hot spot speed with the sound speed of the ambient medium, we predict that only CSOs whose initial advance speed is higher than 0.3–0.5 c can evolve into FRIIs (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Radio bimodality: Spin, accretion mode, or both?
Authors: Sikora M. 
Published: February 2009

AbstractA new scenario is suggested to explain a large diversity of the AGN radio properties and their dependence on the galaxy morphology. The scenario is based on the assumption that the growth of supermassive BHs is dominated by the accretion only during the quasar (high accretion rate) phase, otherwise – by mergers with less massive black holes. Following that, BHs are expected to spin much faster in giant ellipticals than in disk galaxies. Within the frame of the spin paradigm this explains the observed relation of the radio‐dichotomy with the galaxy morphology. Various theoretical and observational aspects of such a dichotomy are discussed. In particular, the issue of the intermittency and suppression of a jet production at high accretion rates is addressed and a scenario for production of powerful, extended radio sources is drafted (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Future investigations of GPS and CSS radio sources with LOFAR
Authors: Snellen I.A.G. , Röttgering H.J.A. , Barthel P.D. , Best P.N. , Brüggen M. , Conway J.E. , Jarvis M.J. , Lehnert M.D. , Miley G.K. , Morganti R. 
Published: February 2009

AbstractIn the next few years, the Low Frequency Array (LOFAR) will open up one of the last astronomically unexplored wavelength regimes. While the LOFAR core is currently being erected in the Netherlands, its outer stations will cover a large part of Europe, resulting in an unprecedented angular resolution at > meter wavelengths. Next to many other exciting scientific endeavours, LOFAR will be the first instrument to probe the low frequency spectra of Gigahertz Peaked Spectrum (GPS) and Compact Steep Spectrum (CSS) radio sources. It will give new insights into their absorption processes, and probe associated extended emission (possibly linked to earlier epochs of activity) in these enigmatic class of young active galactic nuclei. Furthermore, LOFAR will be sensitive to possibly the most distant GPS and CSS sources, of which their spectral turnovers have redshifted down to the lowest observable radio frequencies (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Effect of Bcl‐xL overexpression on apoptosis and autophagy in recombinant Chinese hamster ovary cells under nutrient‐deprived condition
Authors: Kim Yeon‐Gu , Kim Jee Yon , Mohan Chaya , Lee Gyun Min 
Published: February 2009

AbstractUpon nutrient deprivation during culture, recombinant Chinese hamster ovary (rCHO) cells are subjected to two types of programmed cell death (PCD), apoptosis and autophagy. To investigate the effect of Bcl‐xL overexpression on apoptosis and autophagy in rCHO cells, an erythropoietin (EPO)‐producing rCHO cell line with regulated Bcl‐xL overexpression (EPO‐off‐Bcl‐xL) was established using the Tet‐off system. The expression level of Bcl‐xL in EPO‐off‐Bcl‐xL cells was tightly regulated by doxycycline in a dose‐dependent manner. Bcl‐xL overexpression enhanced cell viability and extended culture longevity in batch culture. Upon nutrient depletion in the later stage of batch culture, Bcl‐xL overexpression suppressed apoptosis by inhibiting the activation of caspase‐3 and ‐7. Simultaneously, Bcl‐xL overexpression also delayed autophagy, characterized by LC3‐II accumulation. Immunoprecipitation analysis with a Flag‐tagged Bcl‐xL revealed that Bcl‐xL interacts with Bax and Bak, essential mediators of caspase‐dependent apoptosis, as well as with Beclin‐1, an essential mediator of autophagy, and may inhibit their pro‐cell death function. Taken together, it was found that Bcl‐xL overexpression inhibits both apoptosis and autophagy in rCHO cell culture. Biotechnol. Bioeng. 2009;103: 757–766. © 2009 Wiley Periodicals, Inc.
Efficient distribution of emotion‐related data through a networked virtual environment architecture
Authors: Quax Peter , Di Fiore Fabian , Lamotte Wim , Van Reeth Frank 
Published: February 2009

AbstractIn this paper we describe the way in which emotion‐related data can efficiently be exchanged between participants in a large‐scale networked virtual environment. This type of metadata is extracted from real‐time captured video streams using off‐the‐shelf webcams and applied onto a two‐dimentional (2D) stylised avatar; thereby improving the immersion the user experiences while navigating and communicating in the virtual world. As emotion‐related data—once processed through the system—can be considered a specific type of state information, a generic networked virtual environment architecture can be used to distribute the information between participants. We have opted to extend the in‐house developed architecture for large‐scale virtual interactive communities (ALVIC‐NG) architecture to be able to process the information flows. We will show that the inclusion of this new type of information does not have a detrimental effect on the scalability of the system. Copyright © 2009 John Wiley & Sons, Ltd.
Motion autonomy for humanoids: experiments on HRP‐2 No. 14
Authors: Yoshida Eiichi , Laumond Jean‐Paul , Esteves Claudia , Kanoun Oussama , Mallet Anthony , Sakaguchi Takeshi , Yokoi Kazuhito 
Published: February 2009

AbstractThis paper deals with whole‐body motion planning and dynamic control for humanoid from two aspects: locomotion including manipulation and reaching. In the first part, we address a problem of simultaneous locomotion and manipulation planning that combines a geometric and kinematic motion planner with a dynamic humanoid motion generator. The second part deals with whole‐body reaching tasks by using a generalized inverse kinematics (IK) method to fully exploit the high redundancy of the humanoid robot. Through experiments using humanoid platform HRP‐2 No. 14 installed at LAAS‐CNRS, we first verify the validity of each method. An integrated experiment is then presented that unifies the both results via visual perception to execute an object‐fetching task. Copyright © 2009 John Wiley & Sons, Ltd.
Solid‐State Structural Characterization of Cutinase–ECE‐Pincer–Metal Hybrids
Authors: Rutten Lucy , Wieczorek Birgit , Mannie Jean‐Paul B. A. , Kruithof Cornelis A. , Dijkstra Harm P. , Egmond Maarten R. , Lutz Martin , Klein Gebbink Robertus J. M. , Gros Piet , van Koten Gerard 
Published: February 2009

AbstractCrystal‐clear structures: The first crystal structures of organometallic pincer–cutinase hybrids (see figure) provide insight into the 3D structural arrangement of both the protein and the organometallic pincer moiety, and reveal different binding modes for different pincers.magnified imageThe first crystal structures of lipases that have been covalently modified through site‐selective inhibition by different organometallic phosphonate‐pincer–metal complexes are described. Two ECE‐pincer‐type d8‐metal complexes, that is, platinum (1) or palladium (2) with phosphonate esters (ECE=[(EtO)‐(O)P(‐O‐C6H4‐(NO2)‐4)(‐C3H6‐4‐(C6H2‐(CH2E)2)]−; E=NMe2 or SMe) were introduced prior to crystallization and have been shown to bind selectively to the Ser120 residue in the active site of the lipase cutinase to give cut‐1 (platinum) or cut‐2 (palladium) hybrids. For all five presented crystal structures, the ECE‐pincer–platinum or –palladium head group sticks out of the cutinase molecule and is exposed to the solvent. Depending on the nature of the ECE‐pincer–metal head group, the ECE‐pincer–platinum and –palladium guests occupy different pockets in the active site of cutinase, with concomitant different stereochemistries on the phosphorous atom for the cut‐1 (SP) and cut‐2 (RP) structures. When cut‐1 was crystallized under halide‐poor conditions, a novel metal‐induced dimeric structure was formed between two cutinase‐bound pincer–platinum head groups, which are interconnected through a single μ‐Cl bridge. This halide‐bridged metal dimer shows that coordination chemistry is possible with protein‐modified pincer–metal complexes. Furthermore, we could use NCN‐pincer–platinum complex 1 as site‐selective tool for the phasing of raw protein diffraction data, which shows the potential use of pincer–platinum complex 1 as a heavy‐atom derivative in protein crystallography.
Synthesis and Properties of Mononuclear Group 10 Alkoxy‐Biscarbene Complexes
Authors: López‐Alberca María P. , Mancheño María J. , Fernández Israel , Gómez‐Gallego Mar , Sierra Miguel A. , Torres Rosario 
Published: February 2009

AbstractNew Pd‐and Pt‐biscarbenes: The synthesis by the stoichiometric transmetalation reactions from Fischer alkoxy‐chromium(0) carbene complexes of stable mononuclear (palladium and platinum) alkoxy‐biscarbene complexes is reported. The structure, bonding situation, and the electronic and redox properties of these complexes are studied by a combination of experimental and computational (DFT) methods.magnified imageThe synthesis, isolation, and complete characterization (NMR and X‐Ray diffraction techniques) of stable mononuclear (palladium and platinum) alkoxy‐biscarbene complexes is reported. These compounds are easily accessible through stoichiometric transmetalation reactions from Fischer alkoxy‐chromium(0) carbene complexes. By a combination of experimental (UV/Vis spectroscopy, cyclic voltammetry) and computational methods (DFT), the structure, bonding situation, and the electronic and redox properties of these complexes are studied. Although they have structures quite similar, their electronic properties strongly depend on the metal and also on the substitution in the aromatic rings in the aniline moieties. Electron‐withdrawing groups stabilize the HOMO causing the shifting of the oxidation waves to lower anodic potentials in the corresponding cyclic voltammograms.
Multimodal‐Luminescence Core–Shell Nanocomposites for Targeted Imaging of Tumor Cells
Authors: Hu He , Xiong Liqin , Zhou Jing , Li Fuyou , Cao Tianye , Huang Chunhui 
Published: February 2009

AbstractLight on target: Silica‐coated upconverting nanophosphor (UCNP) nanocomposites have been synthesized with organic dye (fluorescein isothiocyanate, FITC) incorporated in the silica shell. The nanocomposites are well dispersed and have good photostability and biocompatibility. These nanocomposites readily conjugated with folic acid for targeted multimodal bioimaging (see schematic representation).magnified imageUniform silica‐coated NaYF4: 20 mol % Yb, 2 mol % Er nanocomposites with good dispersibility, containing organic dye incorporated in the silica shell and folic acid conjugated on the surface of the shell, were prepared and characterized. The core–shell nanocomposites are 20–22 nm in size, water soluble, and buffer stable, with good photostability and biocompatibility. Folic acid (FA) offers a means of targeting human cells that greatly overexpress the folate receptor (FR). By the use of confocal microscopy and quantitative flow cytometry analysis, we demonstrate the receptor‐mediated delivery of FA‐conjugated nanocomposites targeting FR‐positive cell lines, such as KB cells. The receptor‐mediated targeting was confirmed by a comparison with the uptake of these nanocomposites in FR‐negative cell lines, such as MCF‐7. These results show that the silica‐coated upconverting nanophosphor (UCNP) nanocomposites prepared by our strategy can potentially be useful as multimodal bioimaging agents.
Selective Iridium‐Catalyzed Alkylation of (Hetero)Aromatic Amines and Diamines with Alcohols under Mild Reaction Conditions
Authors: Blank Benoît , Michlik Stefan , Kempe Rhett 
Published: February 2009

AbstractSelective amine alkylation: A P,N‐ligand‐stabilized iridium complex has been used as an efficient catalyst for the alkylation of (hetero)aromatic amines with alcohols at mild reaction temperatures and catalyst loadings as low as 0.1 mol % Ir (see scheme). The excellent selectivity of the catalyst for monoalkylation of the amine function has also been exploited for the N,N′‐dialkylation of diamines in both symmetric and nonsymmetric fashions.magnified imageA P,N‐ligand‐coordinated iridium complex has been employed as an efficient catalyst for the selective monoalkylation of (hetero)aromatic amines with alcohols. A significant improvement of this alkylation method has been achieved, such that it can be performed at a temperature of 70 °C and with catalyst loadings as low as 0.1 mol % Ir, while still affording excellent yields of secondary amines. Furthermore, the high selectivity of this catalyst for the monoalkylation of aromatic amino functions has been successfully exploited for the alkylation of diamines in both symmetric and nonsymmetric fashions, providing a novel and very efficient synthetic tool for the preparation of N,N′‐dialkylated aromatic diamines.
Cobalt‐Catalyzed N‐Arylation of Nitrogen Nucleophiles in Water
Authors: Teo Yong‐Chua , Chua Guan‐Leong 
Published: February 2009

AbstractCobalt ′n′ cross‐coupling! A facile and practical strategy catalyzed by CoCl2⋅6 H2O has been developed for the N‐arylation of nitrogen nucleophiles with substituted aryl halides in water. The protocol is very simple and requires only mild conditions. A variety of nitrogen nucleophiles, including pyrazole, indole, and 7‐azaindole, undergo catalysis to afford N‐arylated products in moderate to good yields (up to 86 %; see scheme).magnified image
Synthesis of Two Bioactive Natural Products: FR252921 and Pseudotrienic Acid B
Authors: Amans Dominique , Bellosta Véronique , Cossy Janine 
Published: February 2009

AbstractJackpot: Two for one! Concise and highly convergent syntheses of the immunosuppressive agent FR252921 and the related antimicrobial natural product pseudotrienic acid B were achieved from one common intermediate by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo‐ and regioselective cross‐metathesis to generate the triene moieties, and a Stille cross‐coupling to install the dienic units.magnified imageConcise and highly convergent syntheses of the immunosuppressive agent FR252921 and the related antimicrobial natural product pseudotrienic acid B were achieved from a common intermediate by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo‐ and regioselective cross‐metathesis to generate the triene moieties, and a Stille cross‐coupling to install the dienic units.
A Trimer of Ultrafast Nanomotors: Synthesis, Photochemistry and Self‐Assembly on Graphite
Authors: Cnossen Arjen , Pijper Dirk , Kudernac Tibor , Pollard Michael M. , Katsonis Nathalie , Feringa Ben L. 
Published: February 2009

AbstractLightning quick! A new ultrafast light‐driven molecular motor was developed, which was readily incorporated into a larger trimeric system. The trimer of these motors was studied with STM and at the interface of highly oriented pyrolytic graphite and 1‐phenyloctane the molecules form stable arrays in which the chirality of the trimer is expressed on both the molecular and the supramolecular level (see figure).magnified image
ChemInform Abstract: The Crystal Structure of [Mg2(H2O)6(HCO3)3] +Cl‐, Containing a Magnesium‐Based Hetero‐polycation.
Authors: Dinnebier Robert E. , Jansen Martin 
Published: February 2009

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: Mixed Plumbides (Ca/Sr)xBa1‐xPb3. Structural Chemistry and Chemical Bonding.
Authors: Wendorff Marco , Roehr Caroline 
Published: February 2009

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: Structure and Superconductivity of LiFeAs.
Authors: Pitcher Michael J. , Parker Dinah R. , Adamson Paul , Herkelrath Sebastian J. C. , Boothroyd Andrew T. , Ibberson Richard M. , Brunelli Michela , Clarke Simon J. 
Published: February 2009

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: Sr(Mg3Ge)N4 and Sr(Mg2Ga2)N4: New Isostructural Mg‐Containing Quaternary Nitrides with Nitridometallate Anions of ∞3[(Mg3Ge)N4]2‐ and ∞3 [(Mg2Ga2)N4]2‐ in a 3D‐Network Structure.
Authors: Park Dong Gon , Dong Yongkwan , DiSalvo Francis J. 
Published: February 2009

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 Cryptand‐Encapsulated Germanium(II) Dication.
Authors: Rupar Paul A. , Staroverov Viktor N. , Baines Kim M. 
Published: February 2009

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: Hydrothermal Synthesis, Structure and Antiferromagnetism of Mn[P2O5(OH)2].
Authors: Yang Tao , Zhang Yan , Xiong Ming , Liao Fuhui , Lin Jianhua 
Published: February 2009

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 Stable “End‐On” Iron(III)—Hydroperoxo Complex in Water Derived from a Multi‐Iron(II)‐Substituted Polyoxometalate and Molecular Oxygen.
Authors: Barats Delina , Leitus Gregory , Popovitz‐Biro Ronit , Shimon Linda J. W. , Neumann Ronny 
Published: February 2009

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: Rare Earth‐Transition Metal Indides with Lu5Ni2In4‐Type Structure.
Authors: Zaremba Roman , Hermes Wilfried , Eul Matthias , Poettgen Rainer 
Published: February 2009

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: Organocatalytic Direct Asymmetric Mannich Reactions of Hydroxyacetone by (2S,5S)‐Pyrrolidine‐2,5‐dicarboxylic Acid.
Authors: Gu Qing , Gong Jing‐Jing , Feng Jin , Wu Xin‐Yan , Zhou Qi‐Lin 
Published: February 2009

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: Enantioselective Electrophilic α‐Amination of α‐Cyanoketones Catalyzed by Chiral Nickel Complexes.
Authors: Kim Dae Young 
Published: February 2009

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: Novel Electrosynthesis of a Condensed Thioheterocyclic System Containing a 1,2,4‐Triazole Ring.
Authors: Fotouhi Lida , Hekmatshoar Rahim , Heravi Majid M. , Sadjadi Sodeh , Rasmi Vahideh 
Published: February 2009

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: Iron Catalyst for Oxidation in Water: Surfactant‐Type Iron Complex‐Catalyzed Mild and Efficient Oxidation of Aryl Alkanes Using Aqueous TBHP as Oxidant in Water.
Authors: Nagano Takashi , Kobayashi Shu 
Published: February 2009

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.