bluuebunny/crossref_metadata_2025_split huggingface dataset:
Metal Cation Induced Modulation of the Photophysical Properties of a Platinum(II) Complex Featuring a Dipicolylanilino–Acetylide Ligand
Authors: Lanoë Pierre‐Henri , Fillaut Jean‐Luc , Guerchais Véronique , Le Bozec Hubert , Williams J. A. Gareth 
Published: January 2011

AbstractWe report the synthesis of a new, luminescent, cyclometalated platinum complex 1 incorporating a bis(2‐picolyl)anilino (DPA) group. The complex has the form LPt–C≡C–C6H4–N(CH2py)2, where L is a CNN‐coordinating ligand based on phenylbipyridine. The ground‐state absorption and excited‐state luminescence of complex 1 are modulated by the binding of selected divalent metal ions (Zn2+, Cd2+, Ni2+, and Pb2+) to the DPA unit; the extent of the observed changes are dependent upon the identity of the metal ion. In particular, binding of Zn2+ leads to a substantial enhancement in the emission intensity.
Highly Stereoselective Synthesis of Spiropyrazolones
Authors: Alba Andrea‐Nekane R. , Zea Alex , Valero Guillem , Calbet Teresa , Font‐Bardía Merce , Mazzanti Andrea , Moyano Albert , Rios Ramon 
Published: January 2011

AbstractThe synthesis of spiro compounds through a Michael–Michael–aldol reaction is reported. The reaction affords spiropyrazolone derivatives in good yields, in almost diastereo‐ and enantiopure form, and is catalyzed by diphenylprolinol derivatives. The reaction showed strong nonlinear effects. Remarkably, when a catalyst with 70 %eeis used, the reaction still affords the final spiro compound in almost diastereo‐ and enantiopure form.
Enantioselective Synthesis of Jaspine B (Pachastrissamine) and Its C‐2 and/or C‐3 Epimers
Authors: Llaveria Josep , Díaz Yolanda , Matheu M. Isabel , Castillón Sergio 
Published: January 2011

AbstractJaspine B and its C‐2 and/or C3 epimers have been enantioselectively prepared from butadiene monoepoxide through a synthetic procedure consisting of allylic amination by palladium‐catalyzed dynamic kinetic asymmetric transformation, cross metathesis, and stereoselective dihydroxylation as key steps.
Synthesis and Studies of Covalently Linked Porphyrin‐Expanded Heteroporphyrin Dyads
Authors: Rajeswara Rao M. , Ravikanth M. 
Published: January 2011

AbstractMono‐functionalized core‐modified sapphyrin (with a N2S3 core) and smaragdyrin (with a N4O core) containing a meso‐iodophenyl functional group were synthesized by following a [3+2] condensation approach using appropriate precursors. The mono‐functionalized sapphyrin and smaragdyrin building blocks were used to synthesize the first examples of diphenyl ethyne bridged porphyrin–sapphyrin and porphyrin/ZnIIporphyrin–smaragdyrin dyads under mild Pd0‐coupling conditions. The dyads are freely soluble in common organic solvents and were characterized by various spectroscopic techniques. Photophysical studies indicated the possibility of energy transfer from the porphyrin/ZnII porphyrin sub‐unit to the smaragdyrin sub‐unit in porphyrin/ZnIIporphyrin–smaragdyrin dyads. The potential of these dyads as fluorescent sensors for anions was explored. The studies indicated that the porphyrin–sapphyrin dyad cannot be used as fluorescent sensors, whereas the porphyrin–smaragdyrin dyad was suitable.
Room‐Temperature Nickel‐Catalysed Suzuki–Miyaura Reactions of Aryl Sulfonates/Halides with Arylboronic Acids
Authors: Fan Xin‐Heng , Yang Lian‐Ming 
Published: January 2011

AbstractRoom‐temperature Suzuki–Miyaura aryl–aryl cross‐coupling reactions have been achieved in high yields by using an easily accessible, air‐stable NiII–(σ‐aryl) complex as precatalyst without either the pretreatment of organometallic reagents or the presence of external reductants. The NiII complex, in conjunction with monophosphane ligands such as PCy3·HBF4 or PPh3, allowed the efficient cross‐coupling of aryl sulfonates (OTs, OMs) and/or halides (Cl, Br, I) with arylboronic acids at room temperature in toluene/water in the presence of K2CO3 as base.
Recent Developments in Pd‐Catalyzed Reactions of Diazo Compounds
Authors: Zhang Yan , Wang Jianbo 
Published: January 2011

AbstractPd‐catalyzed reactions of diazo compounds result in unique transformations that are distinct from those of traditional processes catalyzed by RhII or CuI catalysts. Pd carbene migratory insertion was deemed to be the key step in a series of Pd‐catalyzed reactions of diazo compounds. The combination of this unique reaction and classic Pd‐catalyzed cross‐coupling provides new potential for the development of novel Pd‐catalyzed transformations, in particular for C=C double bond formation.
Staphylococcus aureus phenotype switching: an effective bacterial strategy to escape host immune response and establish a chronic infection
Authors: Tuchscherr Lorena , Medina Eva , Hussain Muzaffar , Völker Wolfgang , Heitmann Vanessa , Niemann Silke , Holzinger Dirk , Roth Johannes , Proctor Richard A. , Becker Karsten , Peters Georg , Löffler Bettina 
Published: January 2011

AbstractStaphylococcus aureus is a frequent cause for serious, chronic and therapy‐refractive infections in spite of susceptibility to antibiotics in vitro. In chronic infections, altered bacterial phenotypes, such as small colony variants (SCVs), have been found. Yet, it is largely unclear whether the ability to interconvert from the wild‐type to the SCV phenotype is only a rare clinical and/or just laboratory phenomenon or is essential to sustain an infection. Here, we performed different long‐term in vitro and in vivo infection models with S. aureus and we show that viable bacteria can persist within host cells and/or tissues for several weeks. Persistence induced bacterial phenotypic diversity, including SCV phenotypes, accompanied by changes in virulence factor expression and auxotrophism. However, the recovered SCV phenotypes were highly dynamic and rapidly reverted to the fully virulent wild‐type form when leaving the intracellular location and infecting new cells. Our findings demonstrate that bacterial phenotype switching is an integral part of the infection process that enables the bacteria to hide inside host cells, which can be a reservoir for chronic and therapy‐refractive infections.→ See accompanying Closeup by Christian Garzoni and William Kelley DOI 10.1002/emmm.201100123.
Using staggered grids with characteristic boundary conditions when solving compressible reactive Navier–Stokes equations
Authors: Albin E. , D'Angelo Y. , Vervisch L. 
Published: January 2011

AbstractA specific (hybrid) arrangement of variables is discussed to solve reactive compressible Navier–Stokes equations on staggered‐like grids with high‐order finite difference schemes. The objective is to improve the numerical flow solution at boundaries. Hybrid arrangement behaviour is compared with ‘pure’ colocated and staggered strategies. Classical Fourier analysis shows accuracy to be significantly improved in the hybrid case. One‐dimensional laminar flame test demonstrates increased robustness (in terms of mesh resolution), whereas computation of 1D exiting pressure wave propagation gives evidence that the method also improves accuracy in the prediction of non‐reflecting outflows, compared e.g. with the fully staggered scheme of (J. Comput. Phy. 2003). Multidimensional extension is illustrated through turbulent 2D planar and 3D expanding flames simulations. Copyright © 2011 John Wiley & Sons, Ltd.
A discontinuous Galerkin scheme for the numerical solution of flow problems with discontinuities
Authors: Toulopoulos Ioannis , Makridakis Charalambos 
Published: January 2011

AbstractIn this paper, a new discontinuous Galerkin finite element method for the numerical solution of flow problems with discontinuities is presented. The method is based on the limitation in every cell of the difference between the extrema values and the mean value of the numerical solution. The algorithm and technical details for the implementation of the method are presented in one‐and two‐dimensional problems. Numerical experiments for classical test problems are solved on unstructured triangulations to demonstrate the performance of the proposed method. Copyright © 2011 John Wiley & Sons, Ltd.
Simple and efficient synthesis of 5‐substituted 1‐H‐tetrazoles using metal‐modified clay catalysts
Authors: Chermahini Alireza Najafi , Teimouri Abbas , Moaddeli Ali 
Published: January 2011

AbstractThe synthesis of 5‐substituted 1‐H‐tetrazoles based on reaction of a series of aromatic nitriles with sodium azide was investigated. The reaction was catalyzed by modified montmorillonite K‐10 including Cu2+, Fe3+, Ni2+, and Zn2+ metal ions. The best results obtained by Mont‐K10‐Cu catalyst. The catalysts were reused several times without loss of their activity. The present procedure offers advantages such as a shorter reaction time, simple workup, recovery, and reusability of the catalyst. © 2011 Wiley Periodicals, Inc. Heteroatom Chem 22:168–173, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/hc.20672
Solid–liquid phase alkylation of P=O–functionalized CH acidic compounds utilizing phase transfer catalysis and microwave irradiation
Authors: Keglevich György , Grün Alajos , Blastik Zsófia , Greiner István 
Published: January 2011

AbstractOptimum conditions for the solid–liquid phase alkylation of methylenebis(diphenylphosphine oxide) (MBDPPO) and ethyl cyanomethylphosphonate (ECMP) were explored studying the role of phase transfer catalysis and microwave (MW) irradiation, as well as the effect of the cation of the alkali carbonate. It was found that the alkylation of MBDPPO may be best accomplished in acetonitrile, in the presence of a quaternary ammonium salt and Cs2CO3, while that of ECMP in the absence of catalyst and solvent using K2CO3. MW irradiation was beneficial in both cases. During the alkylation of ECMP, by‐products coming from the alcoholysis of the diethyl ester were also identified. © 2011 Wiley Periodicals, Inc. Heteroatom Chem 22:174–179, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/hc.20673
Voice, silence, and diversity in 21st century organizations: Strategies for inclusion of gay, lesbian, bisexual, and transgender employees
Authors: Bell Myrtle P. , Özbilgin Mustafa F. , Beauregard T. Alexandra , Sürgevil Olca 
Published: January 2011

AbstractEmployee voice has been largely examined as a universal concept in unionized and non‐unionized settings, with insufficient attention to diversity of workers (Rank, 2009). As invisible minorities, gay, lesbian, bisexual, and transgender (GLBT) employees provide a valuable focal point from which to examine employee voice mechanisms. Positing that GLBT employees are often silenced by what is perceived as “normal” in work organizations, this paper identifies some of the negative consequences of this silencing and proposes ways in which the voices of GLBT employees and other invisible minorities can be heard. With its relevance to policies and practices in other organizations, the “Don't ask; don't tell” policy of the U.S. military is used as a lens through which to analyze voice, silence, and GLBT employees in other organizations. Heterosexist environments can foster organizational climates of silence, where the feeling that speaking up is futile or dangerous is widespread among employees. Specific recommendations are provided for HR managers to facilitate the expression of voice for GLBT employees in today's increasingly diverse organizations. ©2011 Wiley Periodicals, Inc.
Speaking up: A conceptual model of voice responses following the unfair treatment of others in non‐union settings
Authors: Goldberg Caren B. , Clark Mark A. , Henley Amy B. 
Published: January 2011

AbstractBridging the literature of procedural justice, social identification, and voice, we present a conceptual model of observers' voice responses to injustices perpetrated on coworkers. Based on social identity theory, we contend that similarity to the target of injustice influences observer identification with the target, as moderated by the observer's scope of justice, which then influences the observer's perceptions of injustice and decision to express voice. Additionally, we posit that the link between observers' perceptions of injustice and expressed voice is moderated by the observer's perceived opportunity to express voice. Finally, we propose that the decision to express voice individually or collectively depends on the justice climate along with the costs and benefits associated with each option. Theoretical and managerial implications are discussed. © 2011 Wiley Periodicals, Inc.
The influence of perceived employee voice on organizational commitment: An exchange perspective
Authors: Farndale Elaine , Van Ruiten Joppe , Kelliher Clare , Hope‐Hailey Veronica 
Published: January 2011

AbstractUsing exchange theory, this study examines how perceptions of employee voice, the employee–line manager relationship, and trust in senior management are related to organizational commitment. It is hypothesized that the direct relationship between perceptions of opportunities for employee voice and organizational commitment is mediated by the longer‐term effects of the perceived employee–line manager relationship and trust in senior management. Multiple regression analysis of a sample of 2,291 employees in organizations undergoing significant change finds some support for this hypothesis, highlighting in particular the importance of trust in senior management as a partial mediator of the relationship between employee voice and organizational commitment. © 2011 Wiley Periodicals, Inc.
Employee voice and job satisfaction in Australia: The centrality of direct voice
Authors: Holland Peter , Pyman Amanda , Cooper Brian K. , Teicher Julian 
Published: January 2011

AbstractThis study examines the relationship between employee voice and job satisfaction using data from the 2007 Australian Workplace Representation Survey (AWRPS) of 1,022 employees. Drawing on human resource management and industrial relations literature, we test hypotheses concerning the relationship between direct and union voice arrangements and job satisfaction. This relationship represents a gap in the literature, which is important from both theoretical and practical perspectives. Controlling for a range of personal, job, and workplace characteristics, regression analyses suggest that although evidence of voice complementarity exists, direct voice appears to be the central voice arrangement underpinning employees' job satisfaction. The article concludes by highlighting the study's implications for management practice and identifies avenues for further research. © 2011 Wiley Periodicals, Inc.
Testing alternate predictions for the performance consequences of middle managers' discretion
Authors: Caza Arran 
Published: January 2011

AbstractAlthough discretion among employees at organizations' lower levels seems to be increasing, it is uncertain whether this is a desirable HRM policy. To understand this issue better, this study tests competing organization theory predictions about the performance consequences of middle managers' perceived discretion. Discretion is defined as the freedom of action or decision authority available in managing subordinates. Survey data from a multinational, European sample of research and development (R&D) units were used to assess the effect of managers' perceived discretion on unit performance. The results show that a combination of ecology theory and strategic choice theory best predicts the relationship between discretion and unit performance. Greater perceived managerial discretion was linked to increased unit performance in a relationship moderated by managerial experience and limited by unit size. These findings have implications for HRM theory and practice, particularly regarding policies related to empowerment and leadership development. © 2011 Wiley Periodicals, Inc.
New times for employee voice?
Authors: Wilkinson Adrian , Fay Charles 
Published: January 2011

AbstractIn this review, which also serves as an introduction to this special section, we briefly discuss the growing interest in employee voice and how and why interest in this topic has emerged over the last few years. “Employee voice” has been used to summarize several different approaches to employee relations, and numerous other terms have been used interchangeably with “employee voice.” In this introduction, we discuss the different approaches to voice, and, relying on the literature of HRM, political science, industrial relations, and organizational behavior, we develop a specific conceptualization of voice useful to scholars and HRM professionals. We discuss the direction of research in this area and summarize the papers in this issue. © 2011 Wiley Periodicals, Inc.
Nitrogen release from a 15N‐labeled compost in a sorghum growth experiment
Authors: Barbanti Lorenzo , Grigatti Marco , Ciavatta Claudio 
Published: January 2011

AbstractIn the near future, composted bio‐solids are expected to play a major role in agriculture. In order to evaluate their contribution to plant growth and nutrition, a mixed sorghum–poultry manure compost was prepared using 15N‐labeled materials. Four treatments were compared in a pot trial: fertilized with compost vs. unfertilized, both of them combined with (cultivated) and without (bare) plants of fibre sorghum (Sorghum bicolor [L.] Moench.). Soil mineral nitrogen (N‐min), plant growth, and N uptake were monitored over a whole growing season (167 d after fertilizer treatment; DAT). Apparent soil mineralization (ASM) and apparent recovery fraction of nitrogen by the plant (ARF) were assessed, as well as the 15N recovery fraction by the plant (15NRF). Compost enhanced sorghum biomass at mid growth (+ 200% of dry weight compared to the unfertilized). However, the difference between the control and the fertilized plants progressively decreased towards the end of the season (+ 70%). Fertilized and unfertilized plants followed different growth patterns over time, although of the same sigmoid type. Conversely, N concentration in plant tissues followed a common dilution curve, indicating that fertilized sorghum efficiently used the supplied N, avoiding luxury consumption. Apparent soil mineralization approximately reached 45% of compost total N in pots without plants. Apparent recovery fraction attained 100% at about two third of the growing season (DAT 111), then declined to about 50% because of root and leaf decline. Compared to it, 15NRF only reached ≈ 20% at mid growth (DAT 83), then declined to 12%. Despite the large difference in absolute values, ARF and 15NRF exhibited a significant correlation, indicating a common trend in time. In contrast to 15NRF, the amount of nutrient derived from fertilizer (Ndff) taken up by the plant decreased over the growth season, proving that compost contributed more to plant nutrition in the early (Ndff ≈ 50%) than in the late growing season (Ndff ≈ 25%). The large difference between ARF and 15NRF suggests that sorghum exerted a strong nutrient demand on the soil and on the fertilizer. Both 15NRF and ARF are considered valuable traits: the former better describes fertilizer behavior and actual supply of N, while the latter outlines the overall effect of fertilizer application on crop nutrition.
Conflicts of interest in research on antipsychotic treatment of pediatric bipolar disorder, temper dysregulation disorder, and attenuated psychotic symptoms syndrome: Exploring the unholy alliance between big pharma and psychiatry
Authors: Robbins Brent Dean , Higgins Meghan , Fisher Maureen , Over Katie 
Published: January 2011

AbstractWe acknowledge those individuals who assisted us in our investigation by providing consultation and feedback on key issues of concern. Thank you in particular to Richard Bargdill, Victor Barbetti, Lisa Cosgrove, Daniel Burston, and Sharna Olfman.
Simultaneous analysis of hydrochlorothiazide, triamterene and reserpine in rat plasma by high performance liquid chromatography and tandem solid‐phase extraction
Authors: Li Hang , He Junting , Liu Qin , Huo Zhaohui , Liang Si , Liang Yong 
Published: January 2011

AbstractA tandem solid‐phase extraction method (SPE) of connecting two different cartridges (C18 and MCX) in series was developed as the extraction procedure in this article, which provided better extraction yields (>86%) for all analytes and more appropriate sample purification from endogenous interference materials compared with a single cartridge. Analyte separation was achieved on a C18 reversed‐phase column at the wavelength of 265 nm by high‐performance liquid chromatography (HPLC). The method was validated in terms of extraction yield, precision and accuracy. These assays gave mean accuracy values higher than 89% with RSD values that were always less than 3.8%. The method has been successfully applied to plasma samples from rats after oral administration of target compounds.
Technological change and innovation behaviour in high level education: An international comparison between Italian and Portuguese samples
Authors: Capece Guendalina , Campisi Domenico 
Published: January 2011

AbstractThe purpose of the research reported in this paper was to study the acceptability of e‐learning instruments either as substitutes for or a complement to traditional face‐to‐face education for people with a humanistic background. We conducted an international comparison between students (attending humanistic studies) in two different European countries: Italy and Portugal. The comparison allowed us to focus on similarities and differences in on‐line educational programs and in two different settings and allowed for appropriate statistical analysis.Starting from data and observations, we propose an acceptance model of Information and Communication Technologies (ICT) and a measurement framework. In particular, the study includes both reliability and construct validity measures.To date there has been little research effort investigating the implications of switching from the traditional educational frameworks towards innovative on‐line ones in an international comparative context. Our results show that students with a humanistic background may not be prepared to fully use technical tools as instruments of education. Therefore ICT instruments must be introduced in humanistic faculties via a stepwise approach which allows a gradual but definitive assimilation of the innovative technological learning instruments.The outcomes of our study have been directly applied on a real case: the Master Program in Human Resource Management (HRM) in the University of Rome ‘Tor Vergata’ where an e‐learning platform has been implemented as a complementary to the traditional approaches to education. Furthermore our model is currently under investigation in large industrial companies with the aim of measuring and improving the e‐learning education in the field of production and distribution of energy. Copyright © 2011 John Wiley & Sons, Ltd.
Transcaruncular electrocoagulation of anterior ethmoidal artery for the treatment of severe epistaxis
Authors: Morera Eduardo , Artigas Christian , Trobat Francisca , Ferrén Luis , Tomás Manuel 
Published: January 2011

AbstractObjective:The irrigation of the upper third of the nasal fossa is supplied by the anterior ethmoidal artery. We describe a surgical technique to deal with epistaxis due to anterior ethmoidal artery bleeding.Patients and Methods:From January 2006 to March 2010 transcaruncular coagulation of the anterior ethmoidal artery was done on nine patients with epistaxis of the upper third of the nasal fossa.Results:The procedure was successful on all cases. No bleeding relapse, major complications, or nasal or orbital sequelae were present in any of the patients.Discussion/Conclusions:Transcaruncular electrocoagulation of the anterior ethmoidal artery is a safe and effective technique to deal with upper third nasal fossa bleeding. Laryngoscope, 2011