bluuebunny/crossref_metadata_2025_split huggingface dataset:
FT‐IR, FT‐Raman, SERS spectra and computational calculations of 4‐ethyl‐N‐(2′‐hydroxy‐5′‐nitrophenyl)benzamide
Authors: Panicker C. Yohannan , Varghese Hema Tresa , Ushakumari L. , Ertan Tugba , Yildiz Ilkay , Granadeiro Carlos M. , Nogueira Helena I. S. , Mary Y. Shyma 
Published: September 2009

AbstractFourier transform infrared (FT‐IR) and FT‐Raman spectra of 4‐ethyl‐N‐(2′‐hydroxy‐5′‐nitrophenyl)benzamide were recorded and analyzed. A surface‐enhanced Raman scattering (SERS) spectrum was recorded in silver colloid. The vibrational wavenumbers and corresponding vibrational assignments were examined theoretically using the Gaussian03 set of quantum chemistry codes. The red shift of the NH stretching wavenumber in the infrared spectrum from the computational wavenumber indicates the weakening of the NH bond resulting in proton transfer to the neighboring oxygen atom. The simultaneous IR and Raman activation of the CO stretching mode gives the charge transfer interaction through a π‐conjugated path. The presence of methyl modes in the SERS spectrum indicates the nearness of the methyl group to the metal surface, which affects the orientation and metal molecule interaction. The first hyperpolarizability and predicted infrared intensities are reported. The calculated first hyperpolarizability is comparable with the reported values of similar derivatives and is an attractive subject for future studies of nonlinear optics. Optimized geometrical parameters of the title compound are in agreement with reported structures. Copyright © 2009 John Wiley & Sons, Ltd.
Prediction of pressure–viscosity coefficient of lubricating oils based on sound velocity
Authors: Mia Sobahan , Ohno Nobuyoshi 
Published: September 2009

AbstractThe pressure–viscosity coefficient is an important parameter in tribology. Experimentally, it is calculated using the high‐pressure viscosity measurement. Also, the adiabatic bulk modulus is calculated using the sound velocity in the lubricating oil. Several lubricating oils are considered on the group basis such as traction oil, mineral oil, polyalphaolefin oil, perfluoropolyether oil and glycerol, depending on their molecular structure. Experimental pressure–viscosity coefficient is compared with the adiabatic bulk modulus. It is found that the pressure–viscosity coefficient increases exponentially with the adiabatic bulk modulus, and the relationship depends on the molecular structure of the lubricating oils. This study proposes two equations to predict the pressure–viscosity coefficient from the adiabatic bulk modulus based on sound velocity, one for the traction oil, and another for the paraffinic mineral oil and the polyalphaolefin oil. Copyright © 2009 John Wiley & Sons, Ltd.
Cold‐inducible RNA‐binding protein contributes to human antigen R and cyclin E1 deregulation in breast cancer
Authors: Guo Xun , Wu Yuehan , Hartley Rebecca S. 
Published: September 2009

AbstractThe cell cycle regulator cyclin E1 is aberrantly expressed in a variety of human cancers. In breast cancer, elevated cyclin E1 correlates with poor outcome, as do high cytoplasmic levels of the stress‐induced RNA‐binding protein human antigen R (HuR). We showed previously that increased cytoplasmic HuR elevates cyclin E1 in MCF‐7 breast cancer cells by stabilizing its mRNA. We show here that cold‐inducible RNA‐binding protein (CIRP) co‐regulates cyclin E1 with HuR in breast cancer cells. CIRP had been shown to interact with HuR in Xenopus laevis oocytes and to be decreased in endometrial cancer. To investigate if human CIRP and HuR co‐regulate cyclin E1, HuR and CIRP levels were altered in MCF‐7 cells and effects on cyclin E1 assessed. Altering HuR expression resulted in a reciprocal change in CIRP expression, while altering CIRP expression resulted in corresponding changes in HuR and cyclin E1 expression. CIRP and HuR co‐precipitated in the presence of RNA and CIRP enhanced HuR binding to the cyclin E1 mRNA and increased cyclin E1 mRNA stability. CIRP co‐localized with HuR predominantly in the nucleus, but also in discrete cytoplasmic foci identified as stress granules (SGs). CIRP overexpression increased the number of HuR‐containing SGs, while its knockdown decreased them. Our results suggest that CIRP positively regulates HuR, ultimately resulting in increased protein synthesis of at least one of its targets. © 2009 Wiley‐Liss, Inc.
Meta‐structured one‐unit‐cell epsilon negative antenna
Authors: Jang Seongnam , Lee Bomson 
Published: September 2009

AbstractThis Letter presents a metamaterial‐based compact one‐unit‐cell epsilon negative zeroth‐order resonant antenna designed on a microstrip line. The size of the proposed antenna is only 7.85 mm × 18 mm (or 0.05λ0 × 0.12λ0) at 1.79 GHz owing to zeroth‐order resonance. Closed‐form design equations for the proposed antenna are provided based on the equivalent circuit employing transmission line theory considering radiation loss. The return losses based on circuit/EM simulations and measurement are in excellent agreement. The measured antenna bandwidth is 17 MHz (about 1%) and total gain is 2.6 dBi. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2991–2994, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24751
Ultrafast clock and carrier recovery with amplified loop and saw filter at 1.25 GHz
Authors: Magri Vanessa P. R. , Lima Rodolfo A. A. , Silva Claumir S. , Mosso Marbey M. 
Published: September 2009

AbstractAn ultrafast circuit for clock and carrier recovery in the microwave frequency range is presented. The circuit consists of a feedback loop amplifier with quadrate‐balanced amplification. It was fabricated on a common FR‐4 substrate, using only commercial surface mount devices components and having a surface acoustic wave filter as the resonant element. The basic feedback circuit was simulated and also realized. Experimental results demonstrate the clock recovery of a Gigabit Ethernet connection and the carrier recovery of a frequency modulation signal. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2929–2933, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24766
A miniature 5.2‐GHz bandstop microstrip filter using multilayer‐technique and coupled octagonal defected ground structure
Authors: Boutejdar Ahmed , Omar Abbas 
Published: September 2009

AbstractIn this article, we propose a new compact defected ground structure (DGS) bandstop filter with broad pass‐band, low insertion loss in the stop‐band, and sharp transition from pass‐ to stop‐band. The bandstop filter structure is simple as it is composed of a pair of octagonal DGS slots and open stubs as a compensated microstrip capacitance. The filter is realized as a multiplayer structure with wide lossless stop‐band. The behavior of the filter has been investigated using EM as well as lumped‐element equivalent circuit model simulations. The design equations are derived using an equivalent circuit model of a parallel L–C resonator. The proposed filter has been optimized, fabricated, and measured. The agreement between the simulated and measured results confirms the effectiveness of the proposed concept. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2810–2813, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24770
Triple‐band dual rectangular ring printed monopole antenna for WLAN/WiMAX applications
Authors: Zhang Qiu‐Yi , Chu Qing‐Xin 
Published: September 2009

AbstractA novel coplanar waveguide‐fed triple‐band antenna with omni directional radiation patters in the azimuth plane is proposed. The proposed antenna consists of two closed rectangular rings monopole and an inverted‐T strip. It can provide three separate impedance bandwidths of 17.5%, range from 2.38 to 2.82 GHz; bandwidth of 16%, range from 3.32 to 3.88 GHz; and bandwidths of 25.5%, range from 5.13 to 6.53GHz, respectively, covering all the 2.4/5.2/5.8 GHz WLAN bands and 2.5/3.5/5.5 GHz WiMAX bands. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2845–2848, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24773
An inkjet‐printed inverted‐F antenna for 2.4‐GHz wrist applications
Authors: Palukuru Vamsi K. , Pekonen Arto , Pynttäri Vesa , Mäkinen Riku , Hagberg Juha , Jantunen Heli 
Published: September 2009

AbstractIn this article, an inkjet‐printed inverted‐F antenna suitable for a watch‐type wireless communication device is presented. The antenna and covering the 2.4 WLAN band (2.4–2.484 GHz) has thickness (2 mm3) and size (40 × 25 mm2). The performance of the printed antenna is experimentally studied and compared with a reference antenna made of Rogers copper laminate. The effect of inkjet‐printed layer thickness on the antenna performance is presented. In addition, the impact of the user's hand proximity on the antenna performance is studied experimentally. The results showed that the total antenna efficiency increases by 13% and 27% with an increase of 1.5 μm in printed layer thickness and a user's hand to antenna distance of 12.5 mm, respectively. The shape of the radiation pattern of the antenna is distorted due to the proximity of the user's hand. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2936–2938, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24777
An improved asymmetric defected ground structure cell and its application to lowpass filter
Authors: Fu Shu‐Hong , Tong Chuang‐Ming , Shen Kai 
Published: September 2009

AbstractAn improved asymmetric defected ground structure cell is presented and analyzed. Based on this structure, a microstrip lowpass filter with low passband loss and high stopband suppression is designed and fabricated. Measured passband losses are below 1 dB, and a sharp slop is obtained at passband frequency fringe. The suppression is no <30 dB in stopband from 2.98 to 10 GHz. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2933–2935, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24778
Enhanced sensitive fiber‐optic sensor with double pass evanescent field absorption
Authors: Nath Pabitra 
Published: September 2009

AbstractA fiber optic sensor with double pass evanescent field absorption from an unclad U‐bent multimode optical fiber is presented. One end of the fiber is polished to form an angled‐tip, whereas the other end is flat polished. Evanescent field absorption in the bending region undergoes further absorption as it reflects back from the fiber tip‐air interface thus, enhancing higher sensitivity of the sensor. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 3004–3006, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24782
Design of dual‐mode pentagon patch resonator filter using asymmetrical λ/4 interdigital coupled lines
Authors: Yuan Lin , Liu Haiwen , Li Lingyu 
Published: September 2009

AbstractIn this letter, an improved coupling mechanism using asymmetrical λ/4 interdigital coupled lines is introduced and applied to design dual‐mode pentagon patch resonator filter. This perturbation method is easy to realize without occupying extra space while the patch resonator structure remains intact. Coupling characteristics and transmission characteristics of this new filter are discussed, and the design methodology is verified by measurements. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51:2817–2819, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24783
Effects of interconnecting transmission lines on four‐way Wilkinson power divider
Authors: Zhou Jiafeng , Morris Kevin 
Published: September 2009

AbstractA four‐way power divider can be designed by interconnecting three two‐way Wilkinson power dividers. This article investigates how the two‐way elements can be interconnected to achieve optimal response. It will be shown that by using properly chosen lengths of interconnecting transmission lines, the bandwidth of the power divider can be significantly broadened. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2850–2852, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24786
A novel two‐port probe for complex permittivity and permeability measurement of liquid and powder type materials
Authors: Park Sangbok , Chung Young‐seek , Kwon Youngwoo , Cheon Changyul 
Published: September 2009

AbstractIn this article, we propose a new method to measure the complex relative permittivity (εr = ε − jε) and permeability (μr = μ − jμ) of liquid‐ or powder‐type materials using a two‐port probe which is constructed from coaxial transmission lines. The two‐port probe is a simple structure that can be easily fabricated with low cost in comparison with conventional probes which are the type of the cavity and waveguide. And we have adopted the Cole–Cole equation and air‐filled coaxial cable for calibrating the proposed probe. To verify the performance of the proposed probe, we measured the properties of materials in the form of liquids and powders and compared the results with those measured by the air‐filled coaxial cable, which shows good agreement. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2977–2979, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24793
Neuromodeling stop band properties of Koch Island patch elements for FSS filter design
Authors: Cruz R. M. S. , da F. Silva P. H. , d'Assunção A. G. 
Published: September 2009

AbstractThis work investigates the use of Koch Island patch elements to design frequency selective surface (FSS) band stop filters that reflect X‐ or Ku‐band signals. To control the FSS resonant frequency and −10 dB bandwidth, we modify the shape of Koch Island patch elements adjusting the fractal parameters, iteration factor, and iteration number. The electromagnetic (EM) behavior is described as a function of the element shapes and the permittivity of the dielectric substrate. A FSS parametric analysis is accomplished through the use of the Ansoft Designer™ software. The obtained EM‐data is utilized for training a multilayer perceptrons (MLP) artificial neural network to achieve the FSS modeling task. Experimental and simulated results are obtained to validate the developed MLP model. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 3014–3019, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24795
Determination of probe receiving coefficients for near‐field to far‐field transformation
Authors: Sánchez‐Escuderos D. , Baquero‐Escudero M. , Bernardo‐Clemente B. , Rodrigo‐Peñarrocha V. M. 
Published: September 2009

AbstractWhen the field radiated by an antenna is measured in the near‐field region, this must be transformed into far‐field. If a spherical wave expansion is used for this transformation, the transmission formula must be solved, and hence the probe receiving coefficients must be known. Normally, the electric Hertzian dipole coefficients can be applied; however, sometimes this approximation is not possible, and even though the antenna under test and probe are far away, the correct probe receiving coefficients are necessary. In this letter, an algorithm for determining these coefficients using the gain parameter of the probe is proposed. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51:2826–2829, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24797
A novel storage and tunable light source generated by a soliton pulse in a micro ring resonator system for super dense wavelength division multiplexing use
Authors: Sarapat Khunthong , Ali Jalil , Yupapin P. P. 
Published: September 2009

AbstractWe propose a novel system of a dense wavelength division operation using the nonlinear microring resonators system that can be used to generate the broad output light spectra, whereas the significant increase in channel capacity is obtained. A system consists of two micro and a nanoring resonators incorporating an add/drop filter that can be integrated into a single system. The large bandwidth signal is generated by using a soliton pulse propagating within a Kerr type nonlinear medium. The obtained results have shown the potential of using such system for broad band light source generation, amplification, storage, and regeneration, whereas the amplified signals can be stored within a nanowaveguide, which is allowed to form the regeneration of the broad light spectra after amplification. The advantage is that the specific wavelength of the broadband source, for instance, 1.50 μm can provide the super dense wavelength division multiplexing channels, whereas the increase in channel capacity of 1000 times is achieved. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2948–2952, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24807
Compact dual‐mode bandpass filter using arrow‐shaped slot resonator
Authors: Sung Youngje 
Published: September 2009

AbstractA novel design of a compact bandpass ring slot filter for achieving dual‐mode operation is proposed and experimentally studied. By using an arrow‐shaped slot structure as a resonator, the resonant frequency of the proposed filter is significantly lowered, which can lead to a large filter size reduction for a fixed frequency operation. Two degenerate modes are achieved by loading with proper asymmetry, which can be placed at the corner of diagonals. A prototype of the proposed design is implemented and measured. From the measured results, the proposed filter has about 5.2% bandwidth at the center frequency of 0.97 GHz and a minimum insertion loss of 1.07 dB within passband. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 2989–2991, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24809
Modified short‐circuit quarter‐wavelength resonators for the design of microstrip dual‐passband bandpass filter
Authors: Tang Ching‐Wen , Hsu Huan‐Chang 
Published: September 2009

AbstractIn this article, a novel microstrip dual‐passband bandpass filter has been proposed and developed. This filter is composed of two modified short‐circuit quarter‐wavelength resonators with a half‐wavelength stepped‐impedance resonator. Design procedures and theoretical analysis are provided; the prototypical bandpass filter with dual passbands is fabricated and measured as well. Well matched simulated results and experimental data validate the proposed filter. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 3026–3029, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24811
Erratum: Study of the passive microwave RFID tag range using distance‐dependent reflection coefficient over multipath channel
Authors: Wei Fu , Jianguo Ma 
Published: September 2009

AbstractOriginally published Microwave Opt Technol Lett 51: 2266–2268, 2009. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 3029, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24813
Synthesis and swelling behavior of amphiphilic comb‐like branched polymer (AA‐co‐CMS)‐g‐PMMA
Authors: Zhang Peng , Feng Ying , Sang Qian , Dong Xiucai , Zhou Rui , Zhao Jiruo 
Published: September 2009

AbstractCopolymerization of acrylic acid and p‐chloromethylstyrene (p‐CMS) in dioxane initiated with α,α′‐azobisisobutyronitrile was carried out to produce macroinitiator P(AA‐co‐CMS) containing PhCH2Cl group at 65°C. Then methyl methacrylate was grafted onto P(AA‐co‐CMS) backbone using PhCH2Cl group as an initiation site and FeCl2/triphenyl phosphine complex as a catalyst. The resulted copolymer (AA‐co‐CMS)‐g‐PMMA with a comb‐like branched structure has a hydrophilic backbone (PAA) and hydrophobic side chains (PMMA). Compositions and structures of macroinitiator and the grafted product of P(AA‐co‐CMS)‐g‐PMMA were determined by 1H‐NMR, infrared (IR), and gel permeation chromatography (GPC). The average graft number, the average length of branch chains, the graft ratio, and the graft efficiency were investigated. The swelling behavior of the comb‐like branched polymer was also investigated. The gradual increase of swelling ratios was accompanied by an increase of pH and temperature. The kinetic exponents indicated that the swelling transport mechanisms transformed from Fickian diffusion to non‐Fickian transport as the decreasing pH. Copyright © 2009 John Wiley & Sons, Ltd.
Dependence of maternal serum [AFP]/[hCG] median ratios on age of gestation: comparison of trisomy 21 to euploid pregnancies
Authors: Marcus‐Braun N. , Birk. O. , Manor E. , Segal D. , Harari G. , Toma I. , Shalev S. , Borochowitz Z.U. , Yaron. Y. , Sharony R. , Itzhaky D. , Shtoyerman R. , Appelman Z. , Braun G. 
Published: September 2009

AbstractBackgroundCurrent risk calculations for trisomy 21, which are based on multiples of median (MoM), do not take into account possible differences between euploid and trisomy 21 pregnancies that may develop with gestational age. In order to optimize the predictive value of screening tests, we calculated the ratio between maternal serum concentration of alpha‐fetoprotein (AFP) and that of human chorionic gonadotropin (hCG) in euploid and in trisomy 21 pregnancies.MethodsThe medians of the concentration ratios, [AFP]/[hCG] at 16–21 weeks of gestation, were plotted as a function of gestational age for 307 cases of trisomy 21 and were compared with the medians of 30 549 normal karyotype cases.Results[AFP]/[hCG] ratio medians were independent of body weight and maternal age. There was a significant difference in the [AFP]/[hCG] ratio when comparing trisomy 21 and euploid pregnancies at each week. This difference became greater with advancing gestational age (P < 0.01).ConclusionThere is a significant difference in ratios of [AFP]/[hCG] between euploid and trisomy 21 pregnancies, which may be used to improve detection rates of Down syndrome screening. Copyright © 2009 John Wiley & Sons, Ltd.
Postfunctionalization of poly(propargyl methacrylate) using copper catalyzed 1,3‐dipolar Huisgen cycloaddition: An easy route to electro‐optic materials
Authors: Scarpaci Annabelle , Cabanetos Clement , Blart Errol , Montembault Véronique , Fontaine Laurent , Rodriguez Vincent , Odobel Fabrice 
Published: September 2009

AbstractA one‐pot synthetic route based on copper‐catalyzed Huisgen reaction has been developed to functionalize a methacrylate propargylic polymer with azido‐substituted moieties. This procedure was used for the preparation of electro‐optic materials containing well‐known Disperse Red One (DR1) chromophores along with bulky adamantyl moieties (Adam). The postfunctionalization of the propargylic polymer was successfully achieved using different molar ratios of DR1/Adam. These novel polymers exhibit high glass transition temperature owing to the rigid structure of adamantyl units. Moreover, the second harmonic generation measurements demonstrated the effectiveness of adamantyl groups to act as insulating shield limiting thus the electrostatic interactions between chromophores. Indeed, higher optimal chromophore concentration (50 mol %) than in conventional DR1‐containing polymers (30 mol %) allowed us to increase the d33 coefficient up to 92 pm/V. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 5652–5660, 2009