bluuebunny/crossref_metadata_2025_split huggingface dataset:
Poly(ester urethane) Guides for Peripheral Nerve Regeneration
Authors: Chiono Valeria , Sartori Susanna , Rechichi Alfonsina , Tonda‐Turo Chiara , Vozzi Giovanni , Vozzi Federico , D'Acunto Mario , Salvadori Claudia , Dini Francesca , Barsotti Giovanni , Carlucci Fabio , Burchielli Silvia , Nicolino Silvia , Audisio Chiara , Perroteau Isabelle , Giusti Paolo , Ciardelli Gianluca 
Published: November 2010

AbstractA biocompatible and elastomeric PU was synthesized from low‐molecular‐weight PCL as macrodiol, CMD as chain extender and HDI as chain linker for applications in the field of peripheral nerve repair. PU cast films supported in vitro attachment and proliferation of NOBEC. The in vitro adhesion and proliferation of S5Y5 neuroblastoma cells on the inner surface of uncoated, gelatin‐ and PL‐coated PU guides were compared. Due to their superior in vitro performance, PL‐coated PU guides were tested in vivo for the repair of 1.8 cm‐long defects in rat sciatic nerves. The progressive regeneration was confirmed by EMG and histological analysis showing the presence of regenerating fibers in the distal stumps.
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1H,1H,2H,2H‐Perfluorodecyl‐Acrylate‐Containing Block Copolymers from ARGET ATRP
Authors: Schreiber Ulrike , Hosemann Benjamin , Beuermann Sabine 
Published: November 2010

AbstractBlock copolymers of 1H,1H,2H,2H‐perfluorodecyl acrylate (AC8) were obtained from ARGET ATRP. To obtain block copolymers of low dispersity the PAC8 block was synthesized in anisole with a CuBr2/PMDETA catalyst in the presence of tin(II) 2‐ethylhexanoate as a reducing agent. The PAC8 block was subsequently used as macroinitiator for copolymerization with butyl andtert‐butyl acrylate carried out in scCO2. To achieve catalyst solubility in CO2two fluorinated ligands were employed. The formation of block copolymers was confirmed by size exclusion chromatography and DSC.magnified image
Preparation and Recycling of Plasticized PLA
Authors: Scaffaro Roberto , Morreale Marco , Mirabella Filippo , La Mantia Francesco Paolo 
Published: November 2010

AbstractPLA is one of the most interesting new polymeric materials, mainly because of its favorable environmental features. On the other hand, one of its drawbacks is represented by its brittleness and low impact resistance. A possible solution may be the use of proper impact modifiers. Furthermore, limited knowledge exists on the behavior of PLA upon recycling. In this paper, a detailed investigation has been carried out on the behavior of PLA systems upon adding small amounts of commercial impact modifiers, and the effects of multiple recycling steps have been studied. The use of impact modifiers can effectively improve mechanical properties. Recycling led to a significant reduction in the impact strength; however a relatively high fraction of the other mechanical properties was still retained.
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Sharp Hydrophilicity Switching and Conformality on Nanostructured Surfaces Prepared via Initiated Chemical Vapor Deposition (iCVD) of a Novel Thermally Responsive Copolymer
Authors: Alf Mahriah E. , Godfrin Paul D. , Hatton T. Alan , Gleason Karen K. 
Published: November 2010

AbstractA novel thermally responsive copolymer p(NIPAAm‐co‐DEGDVE) is synthesized using the substrate independent method of iCVD and exhibits a sharp lower critical solution temperature (LCST) transition centered at ≈28.5 ± 0.3 °C determined via quartz crystal microbalance measurements with dissipation monitoring (QCM‐D). Swelling with water below the LCST produces a reversible change of ≈3× in film thickness. The layer is conformal on nanostructured surfaces including MWCNT forests and electrospun nanofiber mats. Modified planar substrates exhibit ≈30°change in static contact angle over the LCST, while through conformal coating on nanostructured substrates changes in static contact angle up to 135° are achieved. Additionally, coated surfaces exhibit temperature sensitive BSA adsorption measured by QCM‐D and is reversible as shown through fluorescence imaging of a coated electrospun nanofiber mat.
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Synthesis and Function of Double‐Stranded Helical Polymers and Oligomers
Authors: Furusho Yoshio , Yashima Eiji 
Published: November 2010

AbstractThe design and synthesis of artificial helical polymers and oligomers has attracted much interest, in connection with fascinating biological helices and their sophisticated functions as well as possible applications in novel chiral materials. The last half‐century has seen a significant advancement in the synthesis of single‐stranded helical polymers and oligomers, since the discovery of the helical structure of isotactic polypropylene. In contrast, the chemistry of double‐stranded helical counterparts is still premature. This paper highlights our recent achievements in the synthesis, structures, and functions of double‐stranded helical polymers and oligomers, stressing an important role of supramolecular chemistry in the design and synthesis of double helices with a controlled helical sense.
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Supported Neodymium Catalysts for Isoprene and rac‐β‐Butyrolactone Polymerization: Modulation of Reactivity by Controlled Grafting
Authors: Terrier Michael , Brulé Emilie , Vitorino Marta J. , Ajellal Noureddine , Robert Carine , Gauvin Régis M. , Thomas Christophe M. 
Published: November 2010

AbstractA series of hybrid materials, bearing neodymium silylamide initiating groups, have been shown to mediate isoprene polymerization when combined with alkyl aluminum activators [methylaluminoxane, AlEt2Cl, Al(iBu)3]. The surface species nature and relative distribution were correlated with isoprene polymerization activity and selectivity. This approach to stereocontrol modulation has been extended to racemic β‐butyrolactone isoselective ring opening polymerization.
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The use of mass spectrometry to study amyloid‐β peptides
Authors: Grasso Giuseppe 
Published: November 2010

AbstractAmyloid‐β peptide (Aβ) varies in size from 39 to 43 amino acids and arises from sequential β‐ and γ‐secretase processing of the amyloid precursor protein. Whereas the non‐pathological role for Aβ is yet to be established, there is no disputing that Aβ is now widely regarded as central to the development of Alzheimer's disease (AD). The so named “amyloid cascade hypothesis” states that disease progression is the result of an increased Aβ burden in affected areas of the brain. To elucidate the Aβ role in AD, many analytical approaches have been proposed as suitable tools to investigate not only the total Aβ load but also many other issues that are considered crucial for AD, such as: (i) the aggregation state in which Aβ is present; (ii) its interaction with other species or metals; (iii) its ability to induce oxidative stress; and (iv) its degradative pathways. This review provides an insight into the use of mass spectrometry (MS) in the field of Aβ investigation aimed to assess its role in AD. In particular, the different MS‐based approaches appliedin vitroandin vivothat can provide detailed information on the above‐mentioned issues are reviewed. Moreover, the advantages offered by the MS methods over all the other techniques are highlighted, together with the recent developments and uses of combined analytical approaches to detect and characterize Aβ. © 2010 Wiley Periodicals, Inc., Mass Spec Rev 30:347–365, 2011
Structure elucidation of native N‐ and O‐linked glycans by tandem mass spectrometry (tutorial)
Authors: An Hyun Joo , Lebrilla Carlito B. 
Published: November 2010

AbstractOligosaccharides play important roles in many biological processes. However, the structural elucidation of oligosaccharides remains a major challenge due to the complexities of their structures. Mass spectrometry provides a powerful method for determining oligosaccharide composition. Tandem mass spectrometry (MS) provides structural information with high sensitivity. Oligosaccharide structures differ from other polymers such as peptides because of the large number of linkage combinations and branching. This complexity makes the analysis of oligosaccharide unique from that of peptides. This tutorial addresses the issue of spectral interpretation of tandem MS under conditions of collision‐induced dissociation (CID) and infrared multiphoton dissociation (IRMPD). The proper interpretation of tandem MS data can provide important structural information on different types of oligosaccharides including O‐ and N‐linked. © 2010 Wiley Periodicals, Inc., Mass Spec Rev 30:560–578, 2011
Sample preparation methods for MALDI‐MS profiling of bacteria
Authors: Šedo Ondrej , Sedláček Ivo , Zdráhal Zbyněk 
Published: November 2010

AbstractDirect matrix‐assisted laser desorption/ionization mass spectrometry (MALDI‐MS) bacterial cell or lysate analysis appears to meet all the criteria required for a rapid and reliable analytical microorganism identification and taxonomical classification tool. Few‐minute analytical procedure providing information extending up to sub‐species level underlines the potential of the MALDI‐MS profiling in comparison with other methods employed in the field. However, the quality of MALDI‐MS profiles and consequently the performance of the method are influenced by numerous factors, which involve particular steps of the sample preparation procedure. This review is aimed at advances in development and optimization of the MALDI‐MS profiling methodology. Approaches improving the quality of the MALDI‐MS profiles and universal feasibility of the method are discussed. © 2010 Wiley Periodicals, Inc., Mass Spec Rev 30:417–434, 2011
AM‐PM Conversion in a W‐band frequency quadrupler
Authors: Campos‐Roca Y. 
Published: November 2010

AbstractThe noise conversion properties of a W‐band PHEMT‐based frequency quadrupler have been investigated. The study includes the experimental evaluation of the quadrupler amplitude‐modulated to phase‐modulated (AM‐PM) conversion coefficient and its implications in the phase noise degradation. The results show that this effect must be taken into account at offset frequencies where the input PM/AM noise ratio is poor. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:47–51, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25621
A thin multi‐slotted dual patch UHF‐band metal‐mountable RFID tag antenna
Authors: Koskinen Tomi V. , Rajagopalan Harish , Rahmat‐Samii Yahya 
Published: November 2010

AbstractThis article presents an RFID (Radio Frequency Identification) tag antenna, which works in the 902–928 MHz band. The multi‐slotted dual patch tag antenna is designed for a 1.6‐mm‐thick substrate, and it can be mounted on metal without degradation in performance. Due to a low‐profile and simple structure, this antenna has more potential for mass production compared to earlier antenna designs. It is shown by simulations how the bandwidth can be increased by incorporating multiple slots in the radiating patch elements of the antenna. Design curves showing the effect of different tuning parameters on the tag performance are presented. The performance of the tag is evaluated both in free‐space and on metal plate and the simulated input impedance, power reflection and radiation patterns are presented. A prototype of this multi‐slotted dual patch tag antenna has been constructed and impedance measurements are performed for the proposed tag in free‐space and on metal plate. Finally, maximum readable distances for the tag are calculated. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:40–47, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25622
Calculating the noise performance of a Ge‐on‐Si schottky photodetector
Authors: Dutta Himadri Sekhar , Das N. R. 
Published: November 2010

AbstractWe present here a study on the noise performance of a Ge‐on‐Si resonant‐cavity‐enhanced schottky photodetector (PD). The present model for noise includes the effect of confinement of carriers at the Si/Ge heterointerface. Noise equivalent bandwidth, dark current, and minimum detectable power are computed. The results show that suitable choice of device dimensions and bias can be used to improve the noise performance of the PD in presence of heterointerface confinement. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:5–10, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25623
The method of lines and cylindrical waveguides with constant arbitrary cross sections
Authors: Hooshyar M. A. 
Published: November 2010

AbstractA modified method of lines is developed for propagation of TM waves in waveguides with constant arbitrary cross sections. The proposed method finds the eigenmodes and associated wave functions in a very practical manner. Numerical performance and accuracy of the proposed method are examined for waveguides with well known characteristics and are found to be very satisfactory. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1–5, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25624
Read range reduction in UHF RFID due to antenna detuning and gain penalty
Authors: Lorenzo J. , Girbau D. , Lázaro A. , Villarino R. 
Published: November 2010

AbstractThis article proposes an analytical study of the link budget in UHF RFID which takes into account the effects of materials where the tags are adhered, and which permits to analyze the impact of detuning and gain penalty on the read range. The analysis is performed for two typical tag antenna topologies: a dipole antenna and a slot antenna. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:144–148, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25625
Third‐order dual‐band filter with dual‐band admittance inverter
Authors: Liu Wei‐Ping , Tung Yu‐Wei 
Published: November 2010

AbstractIn this article, stepped impedance resonator with dual‐band admittance inverter is proposed to design the dual‐band microstrip filter to operate at (2.4, 5.2) GHz and at (0.9, 2.3) GHz, respectively. The proposed dual‐band microstrip filter consists of stepped‐impedance resonators (SIRs) in shunt cascaded by dual‐band inverter. The half‐wavelength SIR is constructed to simultaneously excite the dual resonances at those specified frequencies. The dual‐band admittance inverter used is composed of two open stubs and one transmission line to make the contribution of the performance of the J‐admittance. The transmission zeros of the admittance inverter can also enhance that of SIRs. The enhanced transmission zeros can be designed on the basis of the required J value and characteristic impedances of the inverter. The study has indicated that the proposed structure and method can achieve the design goals of dual‐band filter. Experimental filters are fabricated and measured to confirm the design. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:140–143, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25626
Compact dualband bandpass filter with two transmission zeros using dual‐mode microstrip resonator and tapped‐line geometry
Authors: Yun Tae‐Soon , Noh Sun‐Kuk , Kim Hyung‐Jong , Oh Euy‐Kyo , Son Hong‐Min , Lee Jong‐Chul 
Published: November 2010

AbstractIn this article, the dualband bandpass filters (BPFs) using dual‐mode resonator are designed and implemented. Also, the J‐inverter is investigated as function of the impedance and the electrical length of the open‐stub in the dual‐mode λg/2 microstrip resonator. Especially, the dualband BPFs using dual‐mode resonator are realized by the stepped impedance resonator (SIR) structure and have good out‐of‐band performance as the inverter is alternating by the coupling structure and tapped‐line geometry. The first transmission zero of the dualband BPFs is made by the dual‐mode resonator and the second transmission zero is defined by the open‐stub of the tapped‐line geometry as a function of J‐inverter. The dualband BPF using dual‐mode resonator with two transmission zeros shows the insertion losses of 1.92 and 1.71 dB at the center frequency of 2.42 and 5.65 GHz, respectively. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:108–111, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25627
A hybrid star‐ring‐bus architecture for WDM metropolitan‐regional access networks
Authors: Kuo Shu‐Tsung , Kao Ming‐Seng , Peng Peng‐Chun 
Published: November 2010

AbstractThis work proposes a highly reliable, hybrid star‐ring‐bus architecture (SRBA) for broadband wavelength‐division multiplexed (WDM) regional access networks.A delta‐star network on the top level acts as high‐capacity trunk infrastructure, whose weakness in reliability is overcome by the self‐healing function of the concatenated ring network on the lower level. The ring network is divided into several delta regions, where the traffic load inside each region is unified to minimize the backup resources required in the network. On the bottom level, considerable bus subnets are constructed to serve end users. The idea of λ‐bands is introduced to efficiently manage wavelength carriers used in the network. Moreover, by means of the automatic protection switching (APS) systems in all the optical network units (ONUs), a minimum‐hop rerouting protection scheme against fiber failure(s) is designed. Specifically, we carry out an experimental network to demonstrate the feasibility and survivability of the proposed architecture. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:102–108, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25628
Printed PIFA with a T‐shaped coupling feed for quad‐band thin‐profile mobile phone application
Authors: Xi Dan , Yin Yingzeng , Wang Yan , Wen Lehu , Mo Yuannan 
Published: November 2010

AbstractA quad‐band printed planar inverted‐F antenna with two meander strips is proposed, designed, and tested. Its geometry is mainly comprised of an inverted meandered U‐shaped shorting strip and a tunable T‐shaped shorting strip for providing two operating bands at center frequency about 900 MHz and 1940 MHz to cover four bands: GSM, DCS, PCS, and UMTS with a small area of 15 × 33 mm2. The antenna can be easily fed by a 50‐Ω feed‐line without any external matching circuit or lumped circuit elements for size reduction or bandwidth enhancement. It is easy to fabricate at low cost and especially fit for thin‐profile mobile phone application. Good impedance and radiation performances are obtained. Details of the proposed antenna and the obtained results are also presented. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:68–72, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25629
Application of the cut‐off resonator for microwave monitoring of transformer oil
Authors: Kapilevich Boris , Lipsky Anatoly , Litvak Boris 
Published: November 2010

AbstractThis paper describes a cut‐off resonator designed for testing transformer oil is proposed.The two kinds of transformer oil have been compared—“fresh” (unused) and “old” (used) for a long period in real‐world conditions. The experimental setup has been designed and assembled on the basis of the cut‐off resonator with plastic tube containing the tested oil. There was observed the shift of resonance curves of the measured insertion losses between the “old” and the “fresh” samples. Also, the “old” oil has higher insertion loss that is caused by increasing its loss tangent compared with the “fresh” oil. These parameters can be used for estimating quality of the transformer oils. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:66–68, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25630
A wideband low‐profile monopolar patch antenna
Authors: Zheng Shu‐Feng , Yin Ying‐Zeng , Ren Xue‐Shi , Liu Zhen‐Yang , Kang Le 
Published: November 2010

AbstractA wideband low‐profile monopolar patch antenna is presented in this article. The proposed antenna consists of a circular‐ring patch shorted to the ground plane by four shorting posts and a coupling patch connected with a feeding probe for bandwidth improvement. This designed antenna can provide a wide operating band (68.5% for VSWR < 2) while keeping a low profile (about 7% of the free‐space wavelength at the lowest operating frequency) and it also offers stable monopole‐like radiation patterns over the operating band. An antenna prototype is fabricated for testing, and the measured results agree well with the simulated ones. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:28–32, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25631
Wideband‐modified bow‐tie slot antenna with a U‐shaped tuning stub
Authors: Yoon JoongHan 
Published: November 2010

AbstractIn this article, a novel design for a modified bow‐tie slot antenna with a U‐shaped tuning stub for broadband applications is presented.The prototype consists of a modified bow‐tie slot and a U‐shaped tuning stub for feeding. The simulation results show that the impedance matching of the proposed modified bow‐tie slot antenna was greatly affected by the feed gap between the modified bow‐tie slot and the tuning stub and by the size of the U‐shaped tuning stub. The experiment results indicated that the impedance bandwidth (Return Loss −10 dB definition) of the proposed modified bow‐tie slot antenna was about 2.73 GHz. Also, the radiation patterns and gains in the experiment results are presented and discussed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:23–28, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25632
Robust optimization of microwave structures using cosimulation‐based surrogate models
Authors: Koziel Slawomir 
Published: November 2010

AbstractA robust and computationally efficient technique for design optimization of microwave structures is proposed.We exploit cosimulation‐based surrogate models with the essential couplings evaluated using electromagnetic (EM) solver and most of the designable parameters modeled by distributed circuit elements with physical dimensions corresponding to those of the structure being optimized. Good prediction capability of the surrogate model is ensured by the space mapping‐based alignment process. It is demonstrated that the proposed methodology is able to yield a satisfactory design at the computational cost corresponding to two or three EM simulations of the optimized structure. The design of two microstrip filters is presented for the sake of illustration. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:130–135, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25637
Time‐domain optimization for UWB antenna based on correlated energy gain
Authors: Xie Ze‐ming , Li Yong , Ding Huan‐huan 
Published: November 2010

AbstractThe correlated energy gain (CEG) is introduced to describe the time‐domain characteristics of the UWB antenna for pulse radio systems. To improve the time‐domain performance of the pulse UWB system, a planar goblet‐like UWB antenna is proposed. The dimensions of the antenna are optimized using the mean effective CEG (MCEG) as the cost function. Because the MCEG considers the radiating energy and the pulse shape preserving capability simultaneously, the designed antenna can achieve good time‐domain characteristics. The designed antenna is fabricated and measured in time‐domain. Good pulse shape fidelity is observed. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:97–102, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25638