bluuebunny/crossref_metadata_2025_split huggingface dataset:
N‐Heterocyclic Carbene–Phosphinidyne Transition Metal Complexes
Authors: Doddi Adinarayana , Bockfeld Dirk , Bannenberg Thomas , Jones Peter G. , Tamm Matthias 
Published: October 2014

AbstractThe N‐heterocyclic carbene–phosphinidene adduct IPrPSiMe3 is introduced as a synthon for the preparation of terminal carbene–phosphinidyne transition metal complexes of the type [(IPrP)MLn] (MLn=(η6‐p‐cymene)RuCl) and (η5‐C5Me5)RhCl). Their spectroscopic and structural characteristics, namely low‐field 31P NMR chemical shifts and short metal–phosphorus bonds, show their similarity with arylphosphinidene complexes. The formally mononegative IPrP ligand is also capable of bridging two or three metal atoms as demonstrated by the preparation of bi‐ and trimetallic RuAu, RhAu, Rh2, and Rh2Au complexes.
Biphenyl‐Derived Phosphepines as Chiral Nucleophilic Catalysts: Enantioselective [4+1] Annulations To Form Functionalized Cyclopentenes
Authors: Ziegler Daniel T. , Riesgo Lorena , Ikeda Takuya , Fujiwara Yuji , Fu Gregory C. 
Published: October 2014

AbstractBecause of the frequent occurrence of cyclopentane subunits in bioactive compounds, the development of efficient catalytic asymmetric methods for their synthesis is an important objective. Introduced herein is a new family of chiral nucleophilic catalysts, biphenyl‐derived phosphepines, and we apply them to an enantioselective variant of a useful [4+1] annulation. A range of one‐carbon coupling partners can be employed, thereby generating cyclopentenes which bear a fully substituted stereocenter [either all‐carbon or heteroatom‐substituted (sulfur and phosphorus)]. Stereocenters at the other four positions of the cyclopentane ring can also be introduced with good stereoselectivity. An initial mechanistic study indicates that phosphine addition to the electrophilic four‐carbon coupling partner is not the turnover‐limiting step of the catalytic cycle.
A Nano‐sized Supramolecule Beyond the Fullerene Topology
Authors: Dielmann Fabian , Heindl Claudia , Hastreiter Florian , Peresypkina Eugenia V. , Virovets Alexander V. , Gschwind Ruth M. , Scheer Manfred 
Published: October 2014

AbstractThe reaction of [CpBnFe(η5‐P5)] (1) (CpBn=η5‐C5(CH2Ph)5) with CuI selectively yields a novel spherical supramolecule (CH2Cl2)3.4@[(CpBnFeP5)12{CuI}54(MeCN)1.46] (2) showing a linkage of the scaffold atoms which is beyond the Fullerene topology. Its extended CuI framework reveals an outer diameter of 3.7 nm—a size that has not been reached before using five‐fold symmetric building blocks. Furthermore, 2 shows a remarkable solubility in CH2Cl2, and NMR spectroscopy reveals that the scaffold of the supramolecule remains intact in solution. In addition, a novel 2D polymer [{CpBnFe(η5‐P5)}2{Cu6(μ‐I)2(μ3‐I)4}]n (3) with an uncommon structural motif was isolated. Its formation can be avoided by using a large excess of CuI in the reaction with 1.
Optimization of the spark plasma sintering processing parameters affecting the properties of polyimide
Authors: Schwertz Maxime , Ranque Pierre , Lemonnier Sébastien , Barraud Elodie , Carradò Adele , Vallat Marie‐France , Nardin Michel 
Published: October 2014

ABSTRACTThe present study deals with the optimization of polyimide (PI) mechanical properties, obtained by Spark Plasma Sintering (SPS), by using a method combining Design of Experiments (DOE) with physical, structural, and mechanical characterizations. The effects of SPS parameters such as temperature, pressure, dwell time, and cooling rate on the density, mechanical properties, and structure of PI were investigated. The experimental results revealed that the mechanical properties of the material were optimized by raising the sintering temperature up to 350°C. The optimized SPS processing parameters were a temperature of 350°C, a pressure of 40 MPa, and a dwell time of 5 min. Under these conditions, a relative density of 99.6% was reached within only a few minutes. The corresponding mechanical properties consisted of Young's modulus of 3.43 GPa, a Shore D hardness of 87.3, and a compressive strength of 738 MPa for a maximum compressive strain of 61.8%. Moreover, when working at 320°C and at 100 MPa, an increase in the dwell time was necessary to enhance the properties. Contrary to the other parameters, the cooling rate appeared to be a non‐significant parameter. Finally, correlations between the PI structure and the mechanical properties were made to demonstrate the densification mechanisms. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41542.
Practical, Modular, and General Synthesis of 3‐Coumaranones through Gold‐Catalyzed Intermolecular Alkyne Oxidation Strategy
Authors: Shu Chao , Liu Rongfu , Liu Shuang , Li Jian‐Qiao , Yu Yong‐Fei , He Qiao , Lu Xin , Ye Long‐Wu 
Published: October 2014

AbstractA gold‐catalyzed intermolecular alkyne oxidation for the preparation of 3‐coumaranones has been developed. Using 8‐isopropylquinoline N‐oxides as oxidants, the reactions of o‐ethynylanisoles afford versatile 3‐coumaranones in moderate to good isolated yields. The synthetic utility of this chemistry is also indicated by the synthesis of the natural product sulfuretin.
Exploring the everyday retail experience: The discourses of style and design
Authors: Pecoraro Maria , Uusitalo Outi 
Published: October 2014

ABSTRACTIn contrast to earlier studies focusing on spectacular retail store environments, this study concentrates on examining ordinary retail stores and everyday retail experiences. The article explores how different sorts of retail environments influence consumers' experience and behaviour. The research uses a comparative case study and employs the theoretical framework of geosemiotics. Investigating three different stores from the perspective of architectural style reveals that cultural meanings are firmly attached to interior style design, and these can be traced in customers' retail experiences. Our findings suggest, firstly, that stores' focusing solely on functional aspects such as the efficient use of space, standardization and self‐service rather than also considering aesthetic issues leads to rather neutral and uninteresting retail experiences. Secondly, they show that the retail store environment affects the social relationships that consumers establish in commercial locations. Thirdly, the study indicates that customers' overall retail experience is linked to their perceptions of the store's social and environmental responsibility and moral values. On the whole, this research advances our theoretical understanding of everyday consumption experiences. Copyright © 2014 John Wiley & Sons, Ltd.
POEMS syndrome – A case report revealing a complex evolving diagnosis
Authors: Gachoka David N. , Prince Gregory 
Published: October 2014

Key Clinical MessageDescription of POEMS syndrome (Polyneuropathy, Organomegaly, Endocrinopathy, Monoclonal gammopathy, Skin changes) goes back to 1938 when a patient with sensorimotor peripheral neuropathy, hyperpigmemntation, solitary plasmacytoma, and elevated cerebral spinal fluid protein was reported. Since then, numerous other cases of this condition have been described by various authors including one that followed the first case 18 years later about two patients. Even though this rare condition still remains an oddity in diagnosis calling for clinicians to have a high index of suspicion due to its manifestation with varied clinical features. We present a case of POEMS syndrome that started as an episode of transient ischemic attack (TIA) and elevated levels of digestive enzymes not previously reported.
Determination of the Collision Probability between Bubbles and Nonspherical Particles in Flotation
Authors: Sokovnin Oleg M. , Zagoskina Nina V. , Zagoskin Sergey N. 
Published: October 2014

AbstractA new mathematical model of the collision probability between bubbles and non‐spherical particles is proposed. In this model it is assumed that the characteristic size of the particle is much smaller than the bubble radius; the particle density is close to the density of the flotation medium and the particle moves along a streamline flowing around the floating bubble (so‐called inertialess flotation). So, the stochastic orientation of the particle with respect to the bubble surface was considered. On the basis of this model, the analytical expressions of the collision probability for rod‐like and disk‐like particles in the Stokes and Levich hydrodynamic regimes were obtained. The obtained results were compared with previous theories and experimental data.
Double‐Addition Reaction of Aryl Methyl Sulfones with N‐tert‐Butylsulfinyl Imines: Diastereoselective and Concise Synthesis of 2‐Sulfonylated 1,3‐Diamines
Authors: Li Ya , Li Desheng , Zheng Tao , Li Hongsen , Ren Xinfeng 
Published: October 2014

AbstractWe report a double‐addition reaction of methyl phenyl sulfone and methyl 2‐pyridyl sulfone with N‐tert‐butylsulfinyl imines. This method provides concise access to 2‐sulfonylated 1,3‐anti diamines with good to excellent diastereoselectivities. This protocol has the benefit of using readily accessible starting materials and is operationally simple.
Structure and Biosynthetic Assembly of Gulmirecins, Macrolide Antibiotics from the Predatory Bacterium Pyxidicoccus fallax
Authors: Schieferdecker Sebastian , König Stefanie , Weigel Christiane , Dahse Hans‐Martin , Werz Oliver , Nett Markus 
Published: October 2014

AbstractThe gulmirecins constitute a new class of glycosylated macrolides that were isolated from the predatory bacterium Pyxidicoccus fallax HKI 727. Their structures were solved by a combination of NMR spectroscopic experiments and chemical derivatization. Analysis of the annotated gulmirecin gene cluster complemented the configurational assignment and provided insights into the stereochemical course of the biosynthetic assembly. The gulmirecins exhibit strong activity against staphylococci, including methicillin‐resistant Staphylococcus aureus, but no cytotoxic effects on human cells.
Wavefunction in Density Functional Theory Embedding for Excited States: Which Wavefunctions, which Densities?
Authors: Daday Csaba , König Carolin , Neugebauer Johannes , Filippi Claudia 
Published: October 2014

AbstractWe present a detailed analysis of our recently proposed wavefunction in density functional theory method to include differential polarization effects through state‐specific embedding potentials. We study methylenecyclopropene and acrolein in water by using several wavefunction approaches to validate the supermolecular reference and to assess their response to embedding. We find that quantum Monte Carlo, complete‐active space second‐order perturbation theory, and coupled cluster methods give very consistent solvatochromic shifts and a similar response to embedding. Our scheme corrects the excitation energies produced with a frozen environment, but the values are often overshot. To ameliorate the problem, one needs to use wavefunction densities to polarize the environment. The choice of the exchange‐correlation functional in the construction of the potential has little effect on the excitation, whereas the approximate kinetic‐energy functional appears to be the largest source of error.
‘Venturing Towards the Dark Side’: The Use of Imagery Interventions by Recently Qualified Cognitive–Behavioural Therapists
Authors: Bell Tobyn , Mackie Lynn , Bennett‐Levy James 
Published: October 2014

Despite the growing recognition of the value of mental imagery within the field of cognitive–behavioural therapy (CBT), there is minimal research relating to clinicians' experiences of using imagery. This paper explores recently qualified CBT therapists' clinical experiences of using imagery and their perception of the role of imagery within their practice. Twelve therapists, qualified within the past 4 years, were interviewed using a semi‐structured format, and the resulting transcriptions were analysed using Interpretative Phenomenological Analysis (IPA). The analysis identified six super‐ordinate themes: (1) broad and fluid conception of imagery; (2) the importance given to imagery and the varied rationale for its inclusion; (3) varied application; (4) clinician avoidance and apprehension; (5) personal experience of imagery and impact on use; and (6) limited core training and the potential for future use. The themes, as a whole, described a complex and often dichotomous reaction to imagery amongst the therapists. Although a section of participants reported a natural affinity with imagery, other therapists felt that using, and experiencing, imagery was anxiety provoking and problematic. There was, however, unity in the value placed on imagery, the strong rationale for usage and the importance given to imagery‐specific training. Avoidance and apprehension regarding imagery were evident in the majority of participants, and the reasons for such responses included personal, clinical and cultural factors. The overall findings highlight the importance of clinician factors in the way in which imagery is utilized and understood, which has positive implications for training, personal development and future research. Copyright © 2014 John Wiley & Sons, Ltd.Key Practitioner Message

There is a universal recognition of the value of imagery for experiential learning and emotional connection.
Therapists apply a variety of rationales for using imagery.
Avoidance of using imagery in CBT practice is widely reported and occurs for a variety of personal and clinical reasons.
Clinicians' own experience of imagery has a significant influence on the way in which imagery is understood, utilized and experienced in therapy.
Future training and research in imagery should more explicitly address the clinician factors that can inhibit or facilitate the use of evidence‐based imagery interventions.
Fishing on chips: Up‐and‐coming technological advances in analysis of zebrafish and Xenopus embryos
Authors: Zhu Feng , Skommer Joanna , Huang Yushi , Akagi Jin , Adams Dany , Levin Michael , Hall Chris J. , Crosier Philip S. , Wlodkowic Donald 
Published: October 2014

AbstractBiotests performed on small vertebrate model organisms provide significant investigative advantages as compared with bioassays that employ cell lines, isolated primary cells, or tissue samples. The main advantage offered by whole‐organism approaches is that the effects under study occur in the context of intact physiological milieu, with all its intercellular and multisystem interactions. The gap between the high‐throughput cell‐based in vitro assays and low‐throughput, disproportionally expensive and ethically controversial mammal in vivo tests can be closed by small model organisms such as zebrafish or Xenopus. The optical transparency of their tissues, the ease of genetic manipulation and straightforward husbandry, explain the growing popularity of these model organisms. Nevertheless, despite the potential for miniaturization, automation and subsequent increase in throughput of experimental setups, the manipulation, dispensing and analysis of living fish and frog embryos remain labor‐intensive. Recently, a new generation of miniaturized chip‐based devices have been developed for zebrafish and Xenopus embryo on‐chip culture and experimentation. In this work, we review the critical developments in the field of Lab‐on‐a‐Chip devices designed to alleviate the limits of traditional platforms for studies on zebrafish and clawed frog embryo and larvae. © 2014 International Society for Advancement of Cytometry
A novel DSP‐based PFC‐DPLL with fuzzy controlled acquisition aid to improve acquisition performance and noise immunity
Authors: Chatterjee Basab , Biswas B. N. , Ray Sudhbindu 
Published: October 2014

SummaryThis paper proposes a new digital signal processing (DSP)‐based phase frequency controlled digital phase locked loop. Here, a very simplistic form of fuzzy logic controller with the help of carrier phase and frequency error as input data is used to provide an acquisition aid. A frequency discriminator is employed to generate frequency error, and phase detector output is taken for phase error. This addition of an acquisition aid helps the loop to achieve the minimum acquisition time and maximum noise rejection simultaneously. An additional phase control in the digitally controlled oscillator makes the loop perform even better towards this goal. The implementation of the proposed loop is carried out on a reconfigurable logic platform using System Generator®;, a tool from Xilinx®; used to design real‐time DSP application. A significant improvement of time domain characteristics are observed as well as the performance in presence of additive white Gaussian noise is demonstrated in terms of the reduction in steady‐state phase jitter and enhancement in output signal to noise ratio in the proposed loop. Copyright © 2014 John Wiley & Sons, Ltd.
Design of a user anonymous password authentication scheme without smart card
Authors: Kumari Saru , Khan Muhammad Khurram , Li Xiong , Wu Fan 
Published: October 2014

SummaryRecently, Jiang et al. and He et al. independently found security problems in Chen et al.'s remote user authentication scheme for non‐tamper‐proof storage devices like Universal Serial Bus stick and proposed improvements. Nonetheless, we detect that the schemes proposed by Jiang et al. and He et al. overlook a user's privacy. We also observe that Jiang et al.'s scheme is vulnerable to insider attack and denial of service attacks and lacks forward secrecy. We point out that the password changing facility in He et al.'s scheme is equivalent to undergoing registration, whereas in Jiang et al.'s scheme, it is unsuitable. Moreover, the login phase of both the schemes is incapable to prevent the use of wrong password leading to the computation of an unworkable login request. Therefore, we design a new scheme with user anonymity to surmount the identified weaknesses. Without adding much in communication/computational cost, our scheme provides more security characteristics and keeps the merits of the original schemes. As compared with its predecessor schemes, the proposed scheme stands out as a more apt user authentication method for common storage devices. We have also presented a formal proof of security of the proposed scheme based on the logic proposed by Burrows, Abadi and Needham (BAN logic). Copyright © 2014 John Wiley & Sons, Ltd.
Bio‐inspired packet dropping for ad‐hoc social networks
Authors: Liaqat Hannan Bin , Xia Feng , Yang Qiuyuan , Xu Zhenzhen , Ahmed Ahmedin Mohammed , Rahim Azizur 
Published: October 2014

SummaryAd‐hoc social networks (ASNETs) explore social properties of nodes in communications. The usage of various social applications in a resource‐scarce environment and the dynamic nature of the network create unnecessary congestion that might degrade the quality of service dramatically. Traditional approaches use drop‐tail or random‐early discard techniques to drop data packets from the intermediate node queue. Nonetheless, because of the unavailability of the social properties, these techniques are not suitable for ASNETs. In this paper, we propose a Bio‐inspired packet dropping (BPD) algorithm for ASNETS. BPD imitates the matching procedure of receptors and epitopes in immune systems to detect congestions. The drop probability settings depend on the selection of data packets, which is based on node popularity level. BPD selects the most prioritized node through social properties, which is inspired by the B‐cell stimulation in immune systems. To fairly prioritize data packets, two social properties are used: (1) similarity and (2) closeness centrality between nodes. Extensive simulations are carried out to evaluate and compare BPD to other existing schemes in terms of mean goodput, mean loss rate, throughput, delay, attained bandwidth, and overhead ratio. The results show that the proposed scheme outperforms these existing schemes. Copyright © 2014 John Wiley & Sons, Ltd.
Deficits in cerebellar granule cell development and social interactions in CD47 knockout mice
Authors: Hsieh Chung‐Pin , Chang Wen‐Teng , Lee Yi‐Chao , Huang A‐Min 
Published: October 2014

ABSTRACTCD47 is involved in neurite differentiation in cultured neurons, but the function of CD47 in brain development is largely unknown. We determined that CD47 mRNA was robustly expressed in the developing cerebellum, especially in granule cells. CD47 protein was mainly expressed in the inner layer of the external granule layer (EGL), molecular layer, and internal granule layer (IGL), where granule cells individually become postmitotic and migrate, leading to neurite fasciculation. At postnatal day 8 (P8), CD47 knockout mice exhibited an increased number of proliferating granule cells in the EGL, whereas the CD47 agonist peptide 4N1K increased the number of postmitotic cells in primary granule cells. Knocking out the CD47 gene and anti‐CD47 antibody impaired the radial migration of granule cells from the EGL to the IGL individually in mice and slice cultures. In primary granule cells, knocking out CD47 reduced the number of axonal collaterals and dendritic branches; by contrast, overexpressing CD47 or 4N1K treatment increased the axonal length and numbers of axonal collaterals and dendritic branches. Furthermore, the length of the fissure between Lobules VI and VII was decreased in CD47 knockout mice at P21 and at 14 wk after birth. Lastly, CD47 knockout mice exhibited increased social interaction at P21 and depressive‐like behaviors at 10 wk after birth. Our study revealed that the cell adhesion molecule CD47 participates in multiple phases of granule cell development, including proliferation, migration, and neurite differentiation implying that aberrations of CD47 are risk factors that cause abnormalities in cerebellar development and atypical behaviors.© 2014 Wiley Periodicals, Inc. Develop Neurobiol 75: 463–484, 2015
Supramolecular Coordination Complexes of theN‐Thiophosphorylated 2,5‐Dithiobiurea [NHC(S)NHP(S)(OiPr)2]2with ZnIIand CdIIIons – Cation‐Induced Dinuclear Mesocate Structure versus Tetranuclear Nanoscaled Aggregate
Authors: Safin Damir A. , Babashkina Maria G. , Kubisiak Piotr , Mitoraj Mariusz P. , Le Duff Cécile S. , Robeyns Koen , Garcia Yann 
Published: October 2014

AbstractThe reaction of the deprotonatedN‐thiophosphorylated bisthioureaN,N′‐bis(diisopropoxythiophosphorylamidothiocarbonyl)hydrazine {[NHC(S)NHP(S)(OiPr)2]2, H2L} with ZnCl2leads to the complex [Zn2{[NHC(S)NP(S)(OiPr)2]2}2] ([Zn2L2]), in which two metal cations are each 1,5‐S,S′‐coordinated through the sulfur atoms of the thiocarbonyl and thiophosphoryl groups of the pendant deprotonated thioacylamidothiophosphate functions. The same reaction with CdCl2leads to the tetranuclear nanoscaled aggregate [(Cd2{[NC(S)NHP(S)(OiPr)2]2}2)2] ([(Cd2L2)2]). This complex contains ligands that are doubly deprotonated through their hydrazine NH groups and exhibit unprecedented μ4and μ5coordination modes. DFT calculations have shown that both complexes are stabilized not only by typical coordination bonds (Zn–S, Cd–S) but also by numerous intramolecular “noncovalent” interactions: polar C–H···S and N–H···S, nonpolar C–H···H–C, and σ‐hole bonding (S···S).
Preparation of Alginate/Graphene Oxide Hybrid Films and Their Integration in Triboelectric Generators
Authors: Valentini Luca , Rescignano Nicoletta , Puglia Debora , Cardinali Marta , Kenny Josè 
Published: October 2014

AbstractSodium alginate/graphene oxide (Al/GO) nanocomposite films were prepared by solvent casting. The structure, morphology, and electrical properties of Al/GO films were characterized by Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, and thermal analysis. The utilization of such an Al/GO film for a device that uses friction as the charging process to convert mechanical energy into electric power is reported. The triboelectric generator (TEG) was fabricated by stacking a drop‐cast Al/GO film bewteen indium–tin oxide (ITO)‐coated poly(ethylene terephthalate) (PET) and a PET sheet. Furthermore, the utilization of such a TEG as a pressure sensor is also illustrated.