bluuebunny/crossref_metadata_2025_split huggingface dataset:
The Origin of the Improved Efficiency and Stability of Triphenylamine‐Substituted Anthracene Derivatives for OLEDs: A Theoretical Investigation
Authors: Yang Bing , Kim Soo‐Kang , Xu Hai , Park Young‐Il , Zhang Houyu , Gu Cheng , Shen Fangzhong , Wang Chunlei , Liu Dandan , Liu Xiaodong , Hanif Muddasir , Tang Shi , Li Weijun , Li Feng , Shen Jiacong , Park Jong‐Wook , Ma Yuguang 
Published: November 2008

AbstractHerein, we describe the molecular electronic structure, optical, and charge‐transport properties of anthracene derivatives computationally using density functional theory to understand the factors responsible for the improved efficiency and stability of organic light‐emitting diodes (OLEDs) with triphenylamine (TPA)‐substituted anthracene derivatives. The high performance of OLEDs with TPA‐substituted anthracene is revealed to derive from three original features in comparison with aryl‐substituted anthracene derivatives: 1) the HOMO and LUMO are localized separately on TPA and anthracene moieties, respectively, which leads to better stability of the OLEDs due to the more stable cation of TPA under a hole majority‐carrier environment; 2) the more balanceable hole and electron transport together with the easier hole injection leads to a larger rate of hole–electron recombination, which corresponds to the higher electroluminescence efficiency; and 3) the increasing reorganization energy for both hole and electron transport and the higher HOMO energy level provide a stable potential well for hole trapping, and then trapped holes induce a built‐in electric field to prompt the balance of charge‐carrier injection.
Alcohol consumption among college students: An agent‐based computational simulation
Authors: Garrison Laura A. , Babcock David S. 
Published: November 2008

AbstractAn agent‐based C++ program was developed to model student drinking. Student‐agents interact with each other and are randomly subjected to good or bad drinking experiences, to stories of other students' experiences, and to peer pressure. The program outputs drinking rates as functions of time based on various input parameters. The intent of this project is to simulate alcohol use, eventually adding other drugs, and possibly creating a simulation game for use as an educational tool. © 2008 Wiley Periodicals, Inc. Complexity, 2009
The struvite‐type compounds M [Mg(H2O)6](X O4), where M = Rb, Tl and X = P, As
Authors: Weil M. 
Published: November 2008

AbstractPhases with composition M [Mg(H2O)6](X O4), where M = Rb, Tl and X = P, As, were obtained by means of the gelatine‐gel diffusion technique from Mg‐EDTA and corresponding metal phosphate/arsenate solutions at pH > 9. The crystal structures were determined from single crystal X‐ray diffractometer data sets. All compounds crystallize isotypically with two formula units in the orthorhombic struvite [NH4[Mg(H2O)6](PO4)] structure type in space group Pmn 21 and with lattice parameters of a ≈ 6.88, b ≈ 6.16, c ≈ 11.34 Å. The structures consist of slightly distorted [Mg(OH2)6] octahedra (m symmetry), X O4 tetrahedra (m symmetry) and [M O10] polyhedra (m symmetry) as single building units, held together by an intricate hydrogen bonding network. The structure can also be described as made up of closed packed pseudo ‐hexagonal layers of [Mg(OH2)6] units stacked along [010] with the X O4 tetrahedra and the M atoms in the voids of this arrangement. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Neutron powder diffraction studies in CaMn1‐xCuxO3 (x = 0, 0.2)
Authors: Ravi S. , Kar Manoranjan , Borah S. M. , Krishna P. S. R. 
Published: November 2008

AbstractNeutron powder diffraction patterns were recorded on CaMn1‐xCuxO3 (x = 0 and 0.20) compounds at different temperatures down to 11K. All the patterns were analyzed by employing Rietveld refinement technique and using the Fullprof program. The observed crystallographic peaks could be refined by using Pbnm space group and no structural transition has been observed down to 11K. An additional peak at 2θ = 16.7° has been observed with decrease in temperature below TN and its intensity was found to increase with decrease in temperature. It could be indexed to magnetic (101) plane. The magnetic ordering is found to be G‐type antiferromagnetic behaviour. The magnetic moment at 11K for the samples x = 0.0 and 0.20 are found to be 2.69 and 2.42μB. The doped Cu ions are found to be in Cu2+ state and take part antiferromagnetic interactions with Mn ions. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Design and implementation of an interleaved soft‐switching converter with output voltage doubler
Authors: Lin B.‐R. , Chen J.‐J. 
Published: November 2008

AbstractAn interleaved pulse‐width modulation (PWM) converter with less power switches is presented in this paper. The buck type of active clamp circuit is used to recycle the energy stored in the leakage inductor of a transformer. The zero voltage switching (ZVS) turn‐on of power switches is realized by the resonance during the transition interval of power switches. At the secondary side of transformers, two full‐wave rectifiers with dual‐output configuration are connected in parallel to reduce the current stresses of the secondary windings of transformers. In the proposed converter, power switches can accomplish two functions of the interleaved PWM modulation and active clamp feature at the same time. Therefore, the circuit components in the proposed converter are less than that of the conventional interleaved ZVS forward converter. The operation principle and system analysis of the proposed converter are provided in detail. Experimental results for a 280 W prototype operated at 100 kHz are provided to demonstrate the effectiveness of the proposed converter. Copyright © 2008 John Wiley & Sons, Ltd.
Novel perspectives of neural stem cell differentiation: From neurotransmitters to therapeutics
Authors: Trujillo Cleber A. , Schwindt Telma T. , Martins Antonio H. , Alves Janaína M. , Mello Luiz Eugênio , Ulrich Henning 
Published: November 2008

AbstractIn the past years, many reports have described the existence of neural progenitor and stem cells in the adult central nervous system capable of generating new neurons, astrocytes, and oligodendrocytes. This discovery has overturned the central assumption in the neuroscience field, of no new neurons being originated in the brain after birth and provided the fundaments to understand the molecular basis of neural differentiation and to develop new therapies for neural tissue repair. Although the mechanisms underlying cell fate during neural development are not yet understood, the importance of intrinsic and extrinsic factors and of an appropriate microenvironment is well known. In this context, emerging evidence strongly suggests that glial cells play a key role in controlling multiple steps of neurogenesis. Those cells, of particular radial glia, are important for migration, cell specification, and integration of neurons into a functional neural network. This review aims to present an update in the neurogenesis area and highlight the modulation of neural stem cell differentiation by neurotransmitters, growth factors, and their receptors, with possible applications for cell therapy strategies of neurological disorders. © 2008 International Society for Advancement of Cytometry
Adaptive online processor management algorithms for multimedia data communication with QoS sensitivity
Authors: Kim Sungwook 
Published: November 2008

AbstractEnergy consumption has become an increasingly important consideration in many real‐time systems. Therefore, the design and analysis for energy‐efficient processor management techniques is an important and widely open research field. In this paper, I propose new online processor management algorithms to control heterogeneous multimedia services while maximizing energy efficiency. These online management algorithms—quality of service control, service request admission and scheduling algorithms—are combined in an integrated framework for higher system performance and energy efficiency. The most important feature of my proposed online framework is its adaptability, flexibility, and responsiveness to current system conditions. Simulation results clearly indicate the superior performance of my proposed framework to strike the appropriate performance balance between contradictory requirements. Copyright © 2008 John Wiley & Sons, Ltd.
Mycobacterium chelonae Peritonitis in a Failed Kidney Transplant Patient on Continuous Ambulatory Peritoneal Dialysis
Authors: Wang Paul Yung Pou 
Published: November 2008

AbstractMycobacterium fortuitum and M. chelonae are the most widely described rapidly growing nontuberculous mycobacterium pathogens causing peritonitis in patients receiving continuous ambulatory peritoneal dialysis (CAPD). M. chelonae infections have been reported to be associated with renal transplant recipients as well. Although its incidence is low, clinical suspicion of this pathogen is necessary in order to accurately diagnose the organism to prevent delay of appropriate treatment. We present a case of a patient with a recent failed kidney transplant who developed an exit‐site infection and CAPD peritonitis from M. chelonae. This article reviews the literature about rapidly growing nontuberculous mycobacterium–related peritonitis and offers insight into its therapy.
Ochrobactrum anthropi Bacteremia in a Non‐Diabetic, Immunocompetent Hemodialysis Patient
Authors: Javaid Muhammad M. , Rumjon Adam , Cubbon Marc 
Published: November 2008

AbstractOchrobactrum anthropi is a rare human pathogen that is usually only associated with significant infection in immunocompromised, debilitated hosts with indwelling medical devices. It has rarely been implicated as a cause of bacteremia in hemodialysis (HD) patients. A review of the literature reveals only 2 reports of O. anthropi bacteremia in HD patients, all of whom were either diabetic or on therapeutic immunosuppression. We describe a case of O. anthropi bacteremia in an immunocompetent non‐diabetic HD patient and present a short review of the literature. Ciprofloxacin therapy failed to eradicate the infection despite in vitro susceptibility of the isolate. The organism subsequently developed resistance to ciprofloxacin and was only eradicated after removal of the patient's tunneled HD central venous catheter and treatment with IV meropenem.
GABA neurotransmitter signaling in the developing mouse lens: Dynamic regulation of components and functionality
Authors: Kwakowsky Andrea , Schwirtlich Marija , Kooy Frank , Ábrahám István , Máté Zoltán , Katarova Zoya , Szabó Gábor 
Published: November 2008

AbstractGamma‐aminobutyric acid (GABA), the major inhibitory neurotransmitter in the vertebrate nervous system, serves as a signaling molecule modulating diverse processes during embryonic development. Earlier we have demonstrated that different forms of glutamic acid decarboxylase (GAD) are differentially regulated during mouse lens development. Here we show that the developing lens expresses also components of GABA signaling downstream of GAD. Multiple GABAA and GABAB receptor subunits as well as the GABA transporters show expression profiles highly correlated with the expression of different GADs. GABA receptors (GABAR) and the vesicular GABA transporter localize at the apical/basal membranes of the lens epithelia and differentiating fibers and may be involved in conventional GABAR‐mediated signaling, while the membrane GABA transporters may also function as Na+/Cl−/GABA carriers. The functionality of GABAR was verified by calcium imaging in whole lenses. Our data suggest that GABA synthesized locally by GAD, acts through GABA receptors by modulating the intracellular calcium levels. Developmental Dynamics 237:3830–3841, 2008. © 2008 Wiley‐Liss, Inc.
Two neuron clusters in the stem of postembryonic zebrafish brain specifically express relaxin‐3 gene: First evidence of nucleus incertus in fish
Authors: Donizetti Aldo , Grossi Mario , Pariante Paolo , D'Aniello Enrico , Izzo Gaia , Minucci Sergio , Aniello Francesco 
Published: November 2008

AbstractWe examined the spatial expression of the relaxin‐3 gene in the developing zebrafish brain, one of the vertebrate model systems in which this gene has been identified. Until the pharyngula stage, the gene is expressed diffusely in the brain, where, starting at about 40 hpf, the transcripts appear restricted in a midbrain cell cluster of the periaqueductal gray. Later, at 72 hpf, the transcripts are still evident in that cluster and distributed in a larger cell number; at this stage, the gene is also expressed posteriorly, in a smaller cell group that, as we report for the first time, could be homologous to mammalian nucleus incertus. The gene expression persists in both cell clusters at 96 hpf. This pattern indicates both conserved and divergent expression features of the relaxin‐3 gene among developing zebrafish and rat brains, where only scattered cells express the gene in the periaqueductal gray. Developmental Dynamics 237:3864–3869, 2008. © 2008 Wiley‐Liss, Inc.
Expression of Fer testis (FerT) tyrosine kinase transcript variants and distribution sites of FerT during the development of the acrosome‐acroplaxome‐manchette complex in rat spermatids
Authors: Kierszenbaum Abraham L. , Rivkin Eugene , Tres Laura L. 
Published: November 2008

AbstractWe report the association of testicular Fer, a non‐receptor tyrosine kinase, with acrosome development and remodeling of the acrosome‐associated acroplaxome plate during spermatid head shaping. A single gene expresses two forms of Fer tyrosine kinases in testis: a somatic form (FerS) and a truncated testis‐type form (FerT). FerT transcript variants are seen in spermatocytes and spermatids. FerS transcripts are not detected in round spermatids but are moderately transcribed in spermatocytes. FerT protein is associated with the spermatid medial/trans‐Golgi region, proacrosomal vesicles, the cytosolic side of the outer acrosome membrane and adjacent to the inner acrosome membrane facing the acroplaxome. FerT coexist in the acroplaxome with phosphorylated cortactin, a regulator of F‐actin dynamics. We propose that FerT participates in acrosome development and that phosphorylated cortactin may contribute to structural changes in F‐actin in the acroplaxome during spermatid head shaping. Developmental Dynamics 237:3882–3891, 2008. © 2008 Wiley‐Liss, Inc.
A Novel Route Toward Fabrication of Twofold‐Shaped CeO2 Dendrites
Authors: Zhang Dongen , Tong Zhiwei , Li Shanzhong , Zhang Xiaobo , Ying Ailing 
Published: November 2008

AbstractHighly uniform twofold‐shaped CeO2 dendrites were successfully prepared in large quantities by using an approach that involves the thermal decomposition of the precursor. The precursor with an average size of 10 μm was prepared from the reaction of Ce(NH4)2(NO3)6 with CO(NH2)2 at 160 °C in a water/diethanolamine (DEA) complex solution. The influence of DEA on dendrite formation is discussed. The dendritic pattern of precursor is almost retained in the as‐prepared product. The optical absorption spectrum indicates that the CeO2 dendrites have a direct bandgap of 3.42 eV. The electrochemical characteristic of the CeO2 dendrites structures have been studied by cyclic voltammetry. It was found that the CeO2 dendrites can greatly improve the electron‐transfer ability. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
A 2D Layered Metal–Organic Framework Constructed by Using a Hexanuclear Manganese Metallamacrocycle as a Supramolecular Building Block
Authors: Choi Jeungwook , Park Jaejoon , Park Mira , Moon Dohyun , Lah Myoung Soo 
Published: November 2008

AbstractThe hexanuclear manganese metallamacrocycle [Mn6(Haahz)6(dmso)6] (1) was prepared by using a new pentadentate ligand, N‐acetylaminobenzhydrazide (H4aahz), and a manganese ion as primary building blocks in dimethyl sulfoxide (dmso). Under identical conditions but in the presence of 1,2‐bis(4‐pyridyl)ethane (bpea) as an exo‐bidentate linker in dimethylformamide (dmf), the 2D layered metal–organic framework (MOF) [Mn6(Haahz)6(bpea)2(dmf)2]n (2) was obtained, where the hexanuclear manganese metallamacrocycle served as a supramolecular building block. The network topology of 2, a 3‐connected 4.82 topology, is quite different from those of the MOFs obtained from a similar pentadentate ligand, N‐acylsalicylhydrazide, although the same hexanuclear manganese metallamacrocycles were used as supramolecular building blocks and bpea was used as the same linker ligand. Although the layers of 2 are staggered relative to each other, the network has quite a large solvent cavity between the layers, because of the corrugated nature of the layer.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Polyimido Clusters of Neodymium and Uranium, Including a Cluster with an M6(μ3‐N)8 Core
Authors: Berthet Jean‐Claude , Thuéry Pierre , Ephritikhine Michel 
Published: November 2008

AbstractNdI3 reacted with 1 or 8/6 equiv. of [PhNMg(thf)], in thf or pyridine, to afford the imido clusters [Nd4(NPh)4I4(thf)n] (n = 3, 4) or [Nd6(NPh)8I2(py)6], which display a cubane or rhombododecahedron core structure, respectively. In contrast, the tetranuclear UIV derivative [U4(NPh)6I4(py)6] was obtained from the reaction of UI3(py)4 with [PhNMg(thf)]. The crystal structures of these clusters are presented.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Generation of SmII Reductants Using High Intensity Ultrasound (Eur. J. Inorg. Chem. 32/2008)
Authors: Teprovich Joseph A. , Antharjanam P. K. Sudhadevi , Prasad Edamana , Pesciotta Esther N. , Flowers Robert A. 
Published: November 2008

AbstractThe cover picture shows the sonochemical preparation of samarium diiodide, samarium dibromide, and samarium triflate. The use of high intensity ultrasound (20 kHz) provides a straightforward and rapid approach to the synthesis of SmII compounds, some of which are not accessible by other means. Of particular importance is the fact that this approach can be used to produce SmII‐based reductants in a wide range of solvents, including alcohols. Details are discussed in the Short Communication by R. A. Flowers II et al. on p. 5015 ff. R. A. F. gratefully acknowledges the National Science Foundation (CHE‐0413845) for support of this work. Mr. Brian Casey is thanked for his assistance in the preparation of the cover.
Asymmetric Synthesis of Iridoid Derivatives Using Resolved 2‐Phenylindoline as a Chiral Auxiliary
Authors: Santangelo Ellen M. , Liblikas Ilme , Mudalige Anoma , Törnroos Karl W. , Norrby Per‐Ola , Unelius C. Rikard 
Published: November 2008

AbstractAn asymmetric synthetic route to cis,cis‐nepetalactol (component of the sex pheromone for the hop aphid, Phorodon humuli) is presented. 2‐Phenylindoline was resolved to provide a chiral auxiliary for the cycloaddition of oxocitral. The resolution was made by chromatographic separation of the diastereomers of the urea derivative made from 2‐phenylindoline and with (R)‐(+)‐α‐methylbenzyl isocyanate, followed by reductive cleavage of the isolated diasteromers using diborane. The cycloaddition of oxocitral using (S)‐2‐phenylindoline yielded an enantiopure product after chromatography. Hydrolysis of the cycloaddition adduct yielded gastrolactol (3). As gastrolactol is a versatile synthon for the synthesis of iridoids, the overall procedure provides a general asymmetric route to elaborated iridoids. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
Stereoselective Chemoenzymatic Synthesis of UDP‐1,2‐cis‐furanoses from α,β‐Furanosyl 1‐Phosphates
Authors: Peltier Pauline , Guégan Jean‐Paul , Daniellou Richard , Nugier‐Chauvin Caroline , Ferrières Vincent 
Published: November 2008

AbstractThe biosynthesis of furanosyl‐containing glycoconjugates is poorly described, mainly due to the lack of UDP‐furanoses. Here we present our effort to synthesize rare nucleotide‐sugars with the aid of a multiple‐enzyme system, notably including galactose‐1‐phosphate uridylyltransferase. Firstly, STD‐NMR techniques were used to probe the broad substrate specificity of this particular enzyme. The chemical synthesis of the needed furanosyl 1‐phosphate starting materials was then performed with unprotected thioimidoyl donors. This led to the first stereoselective chemoenzymatic syntheses of UDP‐β‐L‐arabinofuranose, UDP‐α‐D‐fucofuranose and UDP‐α‐D‐6F‐galactofuranose from starting mixtures of sugar‐phosphates.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)
First Total Synthesis of 14C‐Labeled Procyanidin B2 – A Milestone Toward Understanding Cocoa Polyphenol Metabolism
Authors: Viton Florian , Landreau Cyrille , Rustidge David , Robert Fabien , Williamson Gary , Barron Denis 
Published: November 2008

AbstractThe idea that foods consumed for pure pleasure could provide health benefits received much recognition in the recent years. Among these foods, cocoa and dark chocolate are particularly rich in procyanidins, one of the major dietary families of polyphenols. We developed the first asymmetric total synthesis of procyanidin B2 and applied it to the preparation of a regioselectively radiolabeled 14C‐analogue, which will be used to strengthen our knowledge on the metabolism of procyanidins.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
Intramolecular π‐Stacking in Isostructural Conformational Probes Depends Strongly on Charge Separation, a Proton NMR Study (Eur. J. Org. Chem. 33/2008)
Authors: Poudel Pramod Prasad , Chen Jing , Cammers Arthur 
Published: November 2008

AbstractThe cover picture shows isostructural, conformationally assayable molecules capable of associating aromatic moieties. The molecule that tends to fold is dicationic; the molecule that tends to unfold is a neutral hydrocarbon. This simple result deepens the conversation regarding dispersion in the context of ?‐stacking as a viable component in the control of conformation. Details are discussed in the article by A. Cammers et. al. on p. 5511 ff..
Identification of proteins from membrane preparations by a combination of MALDI TOF‐TOF and LC‐coupled linear ion trap MS analysis of an Antarctic bacterium Pseudomonas syringae Lz4W, a strain with unsequenced genome
Authors: Jagannadham Medicharla V. 
Published: November 2008

AbstractMultidimensional protein identification technology helps in identifying a large number of proteins with ESI by sequencing several peptides with MS/MS methods. When ionization and separation of different hydrophobic and hydrophilic peptides in a single process are difficult, a combination of LC‐coupled linear ion trap MS and MALDI TOF/TOF can be used for identification of proteins as shown in the present study. We have used this combinational approach to identify membrane proteins of the Antarctic bacterium Pseudomonas syringae Lz4W, which are separated by SDS gel electrophoresis. Although the genome of P. syringae Lz4W has not been sequenced, the known genome sequences of mesophilic Pseudomonas species have been used for the identification of the proteins. Broadly, many membrane proteins, proteins with a wide range of molecular weight and pI including some integral membrane proteins could be identified using this procedure. Some of the identified proteins are involved in low temperature adaptation.