bluuebunny/crossref_metadata_2025 huggingface dataset:
The Improvement and Application of Ion-beam excited Acoustic Microscopy
Authors: Tateno Hiroto , Ono Teruo , Nagata Jun , Fukai Akira
Published: March 2014

To improve of the ion-beam excited acoustic microscope (IAM), the authors developed the sensitivity of the ion acoustic spectroscopic (IAS) signal by applying positive feedback to a piezoelectric transducer. The diameter of ion beam, which is the most important parameter for resolution, was minimized to 20 µm. This equipment is useful for sputtering monitor, and operates well both to measure frequency while phase is fixed at -90 degrees and to measure phase while frequency is fixed. Application of this equipment is demonstrated for a sputtering monitor in depth analysis of elements by an ion microprobe analyser.
Study of AO Interaction in Proton-Exchanged 128° Rotated Y-cut LiNbO3 Optical Waveguides by Finite Element Method
Authors: Saiga Noriaki , Ichioka Yoshiki
Published: March 2014

The finite element method was used to analyze the acousto-optic (AO) interaction in a 128° rotated Y-cut LiNbO3 optical waveguide. It revealed that the refractive-index variation of the crystal due to surface acoustic wave (SAW) was mainly contributed from its strain-optic constant, different from Pockels constant in usual substrates, and decayed rapidly along the depth. Calculation showed that, in a shallow waveguide with the depth of 0.6 µm, a 6 mW and 130 MHz SAW with an aperture of 4 mm achieved the diffraction efficiency of 50%. In an experiment using a proton-exchanged substrate, it was 18 mW, which suggested that the AO effect was reduced by one third.
Brillouin Scattering Analysis of Acoustic Domain in Sapphire
Authors: Tokunaga Yoshiaki , Katsuda Hiratoshi , Ishiguro Masakazu
Published: March 2014

A Brillouin scattering study of the acoustic domain in sapphire is presented. On the basis of the Brillouin scattering theory, a pair of incident and scattered angles for analyzing the flux frequencies and scattering cross section to obtain the flux energies is determined using the theory for hexagonal crystal. Our experimental results are as follows: First, obtained mean velocity, 5.76×105 cm/s, agrees with 5.73×105 cm/s of shear fluxes with X propagation and Z polarization. Second, the energy density of the fluxes injected into the sapphire reaches about 10-3 J/cm3 in the frequency range from 0.5 to 1.0 GHz.
Non-Contact Simultaneous Measurement of Thickness and Acoustic Properties of a Biological Tissue Using Focused Wave in a Scanning Acoustic Microscope
Authors: Okawai Hiroaki , Tanaka Motonao , Chubachi Noriyoshi , Kushibiki Jun-ichi
Published: March 2014

It was verified that the frequency dependence of magnitude and phase of the reflection coefficient gave characteristic patterns against the specimen thickness, so that specimen thickness could be determined by analysis of those characteristic patterns. As a result, attenuation constant and sound speed in thin tissue specimens were determined with a non-contact procedure using a scanning acoustic microscope.
Experiments on an Ultrasonic Flow Cytometer Using an Acoustic Velocity Change Measurement System with Arched IDT's
Authors: Unno Yoshihiro , Moriizumi Toyosaka , Shiokawa Showko , Kawabuchi Masami
Published: March 2014

Basic experiments were performed for the purpose of applying an ultrasonic technique to a flow cytometer which can detect the elastic parameters of biological cells. Acoustic velocity change of suspensions of plastic spheres and sheep red blood cells is measured employing a high-precision phase detection system using arched IDT's. The experimental and calculated results show that the present system can be applicable to an ultrasonic flow cytometer.
Polarization Reversal in Several Ferroelectric Liquid Crystals
Authors: Ishibashi Yoshihiro , Orihara Hiroshi , Nakamura Kohji , Yamada Yuichiro
Published: March 2014

The polarization reversals in the surface stabilized ferroelectric liquid crystals DOBAMBC and CS-1011 were experimentally studied, and it was clarified that the former and the latter represent the nucleation-and-growth case and the homogeneous reversal case, respectively. For both of them the models are solved numerically, with the results reflecting the experimental observations reasonably.
Preparation of BaTiO3 Films by RF Sputtering and Their Crystallographic, Dielectric and Optical Properties
Authors: Nagatomo Takao , Omoto Osamu
Published: March 2014

BaTiO3 films having a perovskite structure were fabricated onto a platinum and a fused-quartz substrates by RF planar-magnetron sputtering at a substrate temperature above 500°C. However, to obtain a ferroelectric film, it is necessary to anneal at about 1000°C in an atmosphere of oxygen. One of ferroelectric films obtained had a relative dielectric constant of 1680, a remanent polarization of 0.8 µC/cm2 and a coercive field of 3 kV/cm at room temperature.
Electro-Optic Kerr Effect in Hexagonal Barium Titanate
Authors: Akishige Yukikuni , Sawaguchi Etsuro
Published: March 2014

Electro-optic Kerr effect and related properties in the hexagonal BaTiO3 were studied at the first time. The absorption edge locates at around 380 nm, the refractive indices at 633 nm are n
a=2.31 and n
c=2.39. The quadratic electro-optic coefficient g
33-g
13 is estimated as 0.12±0.02 m4/ C2 (g
33∼0.1 m4/ C2). The g coefficient is comparable order of magnitude to the other compounds with oxygen octahedra.
Sintering Properties of BaTiO3 Green Sheets with High Packing Density
Authors: Ueyama Tamotsu , Yamana Shōzō , Kaneko Naoya
Published: March 2014

The sintering properties were discussed in two kinds of BaTiO3 green sheets, in which packing densities were 48 vol% and 60.4 vol%, respectively. The sintering temperature reduced as the packing density increased ;and the number of internal void in the sintered body decreased considerably and its bending strength increased from 120 MPa to 150 MPa.
Chemical Preparations and Two-Stage Sintering of PLZT
Authors: Yoshikawa Yoshio , Tsuzuki Kaoru , Kobayashi Tsutomu , Takagi Akira
Published: March 2014

Soft agglomerate, fine particle size and amorphous PLZT powders are prepared from nitrates solutions. The effects of postprecipitation processing (washing, drying, raw powder aging and calcining temperature) on powder characteristics and on final densification are examined. Solid state reactions occur above 500°C and both PLZT and PbO phase appear on XRD-profiles. The Crystalline states of these PLZT and PbO are subjected on the above processing. A two-stage sintering is made with various processed powders. The application of acetone washed-aged raw powder and of calcination below 700°C is promissing to obtain fine PLZT ceramics.
Machining of PZT, PT and (Mn, Zn)Fe2O4 Ceramics by Laser-Induced Chemical Etching
Authors: Shiosaki Tadashi , Masuda Hiroshi , Adachi Masatoshi , Kawabata Akira
Published: March 2014

Laser-enhanced chemical etching of PbTiO3, PZT and (Mn–Zn)-ferrite ceramics is reported. The KOH solution of 10 mol/1 is suitable for the laser enhanced inter-granular etching of the PbTiO3 and PZT with depth etching rate higher than 100 µm/s in the initial laser irradiation period of Ar+ laser of 1 W. The KOH and NaOH solutions are also suitable for the intergranular etching of (Mn–Zn)-ferrite. The H3PO4 solution of 6 mol/1 is suitable for the laser enhanced trans-granular etching of (Mn–Zn)-ferrite with the depth etching rate of about 10 µm/s in the initial irradiation period of an Ar+ laser of 1 W.
Ceramic Green Sheet Puncher Using Multilayer Piezoelectric Actuator
Authors: Yoshida Kiminori , Yoshiura Tadashi , Shimada Yuzo
Published: March 2014

A computer controlled ceramic green sheet puncher system was investigated. The punching head was driven by a flight actuator with multilayers of piezoelectric ceramic. The system copes with an arbitrary via hole pattern. It can punch via holes 0.15 mm in diameter through a ceramic green sheet 0.1 mm thick. Punching speed is 40 ms/hole.
Longitudinal-Torsional Composite Transducer and Its Applications
Authors: Ueha Sadayuki , Nagashima Hideki , Masuda Michiyuki
Published: March 2014

The longitudinal-torsional composite transducer is proposed where both longitudinal and torsional piezoelectric elements are provided in the transducer and the two vibration modes of the transducer have the same resonance frequency. Two kind of composite transducers are designed and studied experimentally to work well. One of the transducers is proved to be successfully used for an ultrasonic motor.
Monomorph Characteristics of Semiconductive Piezoceramics
Authors: Uchino Kenji , Yoshizaki Mikihiko , Nagao Atsushi
Published: March 2014

New type piezoelectric bending actuators, monomorphs, originate basically from a metal- semiconductor contact (Schottky barrier) effect. This paper deals with a more sophisticated model, Metal-Insulator-Semiconductor (MIS) structure, to explain detailed monomorph characteristics. Furthermore, voltage versus current relation was measured on the actuator sample to obtain better understanding on the monomorph. The electric charge flow during half a voltage cycle is of the order of 2.6 C/m2, which is several times larger than the usual charge flow associated with the polarization reversal.
Optical Deflection Using a Leaky Surface Acoustic Wave Device
Authors: Urabe Heijiro , Toda Kohji
Published: March 2014

A technique for acousto-optic deflection by using an interdigital transducer (IDT) operating at a solid-liquid interface is described. The ultrasound radiated into water, while propagating alone a piezoelectric substrate, acts efficiently as a diffraction grating for an incident optical beam. The interaction between the optical and the sound beam is carried out under a condition of Bragg reflection. The direction of the deflected beam changes linearly with the frequency in the range of 10–210 MHz. The maximum deflection angle of 1.8° and the maximum deflection efficiency of 72%, obtained in the present technique, are promising values for an optical deflector.
Equilibrium Conductivity for Er Doped BaTiO3
Authors: Takada Ko , Ichimura Hiroshi , Smyth Donald. M.
Published: March 2014

The incorporation Er into BaTiO3 was studied by equilibrium conductivity, lattice parameter, Curie temperature, and micro analysis (SEM, EPMA and TEM). Equilibrium conductivity measurements indicated that Er occupies the Ba-site and the Ti-site near equally when Ba/Ti<=1, however it occupies only the Ti-site when Ba/Ti>1.0. Large difference of the lattice parameter between the samples with Ba/Ti<=1 and Ba/Ti>1 can be explained by the change of incorporation of Er into BaTiO3.
Pyroelectric and Dielectric Properties of Rhombohedral Pb(Zr1-xTixO3 Ceramics
Authors: Adachi Masatoshi , Hachisuka Atsushi , Okumura Naoto , Shiosaki Tadashi , Kawabata Akira
Published: March 2014

PZT ceramics with compositions close to PbZrO3 possess many desirable properties for potential applications in pyroelectric and piezoelectric devices. Sintering of rhombohedral ferroelectric Pb(Zr1-x
Ti
x
)O3 ceramics with x=0.04 to 0.3 and their dielectric, ferroelectric and pyroelectric properties were investigated. The pyroelectric coefficient of the ceramics with x=0.05 was determined as 53×10-9 C/cm2K at room temperature. However, the thermal hysteresis of pyroelectric coefficient was clearly observed. On the other hand, experimental evidence for the second order nature of the higher phase transition from F

R
(H
T) to cubic and the lower phase transition from F

R
(L
T) to F

R
(H
T) occurred at x of around 0.12 in the PZT ceramic system was given in this paper.
Physics and Engineering Principles of Nonlinear Acoustics
Authors: Breazeale M. A.
Published: March 2014

The nonlinear differential equation describing propagation of finite amplitude ultrasonic waves in gases, liquids, and solids is shown to have the same mathematical form. The nonlinearity parameter in each case is defined in terms of fundamentally significant physical quantities. Waveform distortion is described, and the discontinuity distances are compared. Recent results are given for gases, liquids, and solids and their significance is evaluated in terms of modern condensed matter physics and engineering.
Superposed Diagnostic Ultrasonic B-Mode Image with CFAR Proseccing
Authors: Hashimoto Masahiko , Ohtsuki Shigeo , Okujima Motoyoshi
Published: March 2014

A diagnostic ultrasonic B-mode image displays only one tomogram of a human body. It is difficult to get an image which displays the entire organ structure. In this report, a technique superposing several B-mode images obtained at different probe positions into a single image displaying the global structure is described. CFAR processing is applied to each of images as pre-processing for our superposition. The result presented here may be useful for determination of some certain techniques and a variation of this method may be useful for the recording of tomograms in mass screenings.
Propagation Characteristics of SAW on ZnO/AlN/GaAs-Substrate Structure
Authors: Hashimoto Ken-ya , Takada Hiroaki , Yamaguchi Masatsune
Published: March 2014

The paper deals with propagation characteristics of SAW on ZnO/AlN/GaAs-substrate structure. Because of large SAW velocity of AlN and its unusual temperature dependence, SAW on ZnO/AlN/GaAs-substrate structure possesses either a large electromechanical coupling or a small (or zero) temperature coefficient of frequency.
Studies on Ultrasonic Wire Bonding Using the Same or a Different Frequency Complex Vibration Welding Tip
Authors: Tsujino Jiromaru , Sugimoto Hideshi , Horikoshi Mitsuo , Sakai Masayuki , Ando Hideki , Negishi Takashi
Published: March 2014

Ultrasonic wire bonding using a complex vibration tip is proposed and studied. The complex vibration welding tips designed consist of a transverse vibration rod vibrating in a perpendicular direction, and driven by (1) different (40 kHz and 60 kHz) or (2) the same vibration frequency (60 kHz) longitudinal vibration systems. Welding tip vibration locus and direction are controlled by regulating these vibration systems. Thin aluminum wire and copper plate specimens are welded successfully by these equipments. The weld strength also is independent of the direction of wire length with this method.
Characteristics and Model of Ultrasonic Motor
Authors: Kamano Takuya , Suzuki Takayuki , Otoi Eiji
Published: March 2014

The steady state and dynamic characteristics of an ultrasonic motor are measured. Using these results, a practical model of the ultrasonic motor is proposed. The validity of the model is verified experimentally.
Ultrasonic Motors Using Piezoelectric Ceramic Multi-Mode Vibrators
Authors: Takano Takehiro , Tomikawa Yoshiro , Ogasawara Toshiharu , Sugawara Sumio , Konnon Masashi
Published: March 2014

The purpose of this paper is to report development of an ultrasonic motor using piezoelectric ceramic multi-mode vibrators of circular or annular plates, in which degenerate horizontal vibration modes of the same or different form are used. Some constructions of the motor and its experimental characteristics are presented.
The ultrasonic motor investigated herein shows special merit in its thin construction.
Material Characterization of Polymeric Materials by Ultrasonic Spectroscopy
Authors: Hiramatsu Nobuyasu , Taki Seiji , Matsushige Kazumi
Published: March 2014

This article describes the frequency dependence measurements of the attenuation coefficients for several kinds of polymers and the spectroscopy for the composite of polytetrafluoroethylene (PTFE) and glass beads of various sizes. These were performed to investigate the feasibility of the application of our ultrasonic spectroscopy system to nondestructive testing. It was shown that the attenuation coefficient can be promptly and continuously obtained in the wide frequency range and that the spectrum for the composite of PTFE and glass beads changes drastically with the size of the beads.
Slide Trombone Method for Measuring Sound Velocity and Attenuation in Liquid at Very High Frequencies with Sufficient Accuracy
Authors: Nakajima Haruhiko , Hama Aritsune
Published: March 2014

A new method which is suitable for measuring the sound velocity of liquid above 100 MHz is proposed and an apparatus was constructed based on the proposed principle. By examining the temperature dependence of water at 200 MHz it is proved that the apparatus provides correct values of sound velocity with fine resolution.
Ultrasonic Studies of the High-Tc Superconductor YBa2Cu3Oy
Authors: Suzuki Masaru , Okuda Yuichi , Iwasa Izumi , Ikushima Akira J. , Takabatake Toshiro , Nakazawa Yasuhiro , Ishikawa Masayasu
Published: March 2014

We have measured the sound velocity and attenuation of the ortho-I single-phase YBa2Cu3Oy, which has a superconducting transition temperature of about 90 K, and compared them with the tetral-II single-phase YBa2Cu3Oy, which is a semiconductor. The sound velocity of the ortho-I has an additional increase below T
c, which is not observed in the tetra-II. This anomaly may be related directly to the superconductivity of this material. This is not explained by thermodynamic analysis.
Equivalent Circuit of Vibratory Gyroscopic Sensors Driven Piezoelectrically
Authors: Konno Masashi
Published: March 2014

A basic equivalent circuit of the piezoelectric vibratory gyroscopic sensor is derived, and is extended to another circuit by which the effect of extra force factors caused by the shear in adhesion of piezoelectric ceramics can be evaluated. New circuits for reducing the effect are proposed, and are checked experimentally. It is also shown that an applied angular velocity can be estimated not only by measuring the amplitude of the output but also by measuring its phase shift. Finally, the principle of the vibratory gyro used as an angular sensor is explained with a simple dynamic example.
A Method of Measurement of Shear Velocity for Plastic Plate
Authors: Nakanishi Toshiyuki , Kikuchi Toshiaki , Hasegawa Akio , Kashiwagi Eiichi
Published: March 2014

This paper describes a measurement method of acoustic shear wave velocity and its coefficient of absorption in thin plastic material. The measuring technique is based on a water immersion method by which transmission loss characteristics of a directionally sighted beam through the specimen are measured. The transmission loss characteristics of a specimen for an incident beam angle are measured as a function of frequency. In this measurement, a low frequency band of 20 to 400 kHz was adapted to achieve very accurate measurement.
A Single Fiber Heterodyne Optical Fiber Hydrophone
Authors: Takahashi Sumio , Kikuchi Toshiaki , Yagi Ryohei , Hasegawa Akio
Published: March 2014

A heterodyne interference type detection scheme using only one polarization-maintaining fiber is experimentally investigated for underwater sound detection. A linear relation between sound pressure and output voltage has been obtained up to a sound pressure level of 188 dB re 1 µPa. It has been confirmed that an optical fiber hydrophone of this type has a good transient response and is useful for cavitation noise detection.
Experimental Study on Liquid Streaming by SAW
Authors: Shiokawa Showko , Matsui Yoshikazu , Moriizumi Toyosaka
Published: March 2014

Water streaming on the surface of SAW propagating substrate is called SAW streaming. The mechanism of ultrasonic radiation into water due to mode conversion from SAW and the acoustic streaming caused by the sound waves are discussed. The SAW streaming pattern is observed on a metallized surface of SAW propagation. Fundamental experiments for the application of SAW streaming to fluid devices are carried out, and fluid pump and guide are demonstrated.
Measurement of Ultrasonic Velocity in Liquid Using a Modified Ultrasonic Correlation System Under Low S/N Condition
Authors: Imano Kazuhiko , Sannomiya Toshio , Chubachi Noriyoshi
Published: March 2014

A new ultrasonic measurement system introducing techniques of cross-correlation and signal averaging for the accurate measurement of the ultrasonic velocity in liquid is described. Improvement in signal-to-noise ratio (S/N) of 35 dB can be readily attained by averaging the correlation output with the new system which uses a S & H circuit and computer-controlled A/D converter. The usefulness of the S/N improvement for the measurement system under various S/N conditions is verified through the experiments.
Measurement of Shear Wave Velocities of Chalcogenide Glasses at Low Temperature by use of Sphere Resonance and Pulse Echo Methods
Authors: Oshiba Takeo , Ishikawa Etsuko , Onari Seinosuke , Arai Toshihiro , Suzuki Tetsuro
Published: March 2014

Temperature dependence of shear wave velocities of chalcogenide glasses are measured over the frequency range from 190 kHz to 15 MHz by use of sphere resonance and pulse echo methods from 5 K to 300 K. The velocities decrease monotonically with increasing temperature above 20 K in contrast to the temperature dependence of silicate glasses. An anomolous decrease of shear wave velocities of (GeS2)0.25(As2S3)0.75 with temperature below 10 K is interpreted in terms of the Gaussian distribution of two-level systems, which is centered at 1.1×10-3 eV with mean square distribution of 1.2×10-3 eV.
Acoustic Imaging Using Polymer Composite Array Transducer with Directivity Distribution
Authors: Koyama K. , Ito H. , Tanaka K. , Tamura Y.
Published: March 2014

A new type of array transducer system with simple hardware is developed to construct an image without mechanical or electrical scans. The array transducer is composed of two electrode patterns which can transmit an ultrasonic wave having an angle dependence of frequency response. A preliminary simulation of the correlation procedure using a single sinusoidal pulse showed good results for the image construction, but it was difficult for the array transducer system to reconstruct the image because of its acoustic waveform with a tail. A pseudoinverse matrix detection method was then shown applicable to reconstruct the image.
100 MHz Band Ultrasonic Transducers Utilizing Epitaxially Grown ZnO Films
Authors: Kushida Keiko , Takeuchi Hiroshi , Kanda Hiroshi , Yamaguchi Shoji
Published: March 2014

A 100 MHz band ultrasonic transducer with a short pulse response is realized using a 15 µm-thick high quality epitaxial ZnO film. The film is deposited by r
f magnetron sputtering on a gold electrode film grown epitaxially on the c-plane of a sapphire. It was found that well oriented thick (>10 µm) ZnO films with little polycrystalline nuclei can be grown only on highly (111)-oriented gold films whose σ for the Au(111) rocking curve was less than 0.5°. Some examples of high resolution (∼10 µm) imaging are demonstrated with the 100 MHz band transducer.
One-Dimensional Constant Beamwidth Transducer
Authors: Hasegawa Akio , Takahashi Sumio , Kikuchi Toshiaki , Fujita Teruaki
Published: March 2014

A transducer with a constant beamwidth in one plane over a wide frequency range is investigated both theoretically and experimentally. Two test transducers, a curved rectangular type and a curved Hamming type are constructed from a flexible piezoelectric rubber sheet developed recently. It is shown that the former maintains a fairly constant beamwidth but the pattern is not desirable because of large ripples, while the latter has no ripples and the directivity is constant at all frequencies above f=200 kHz.
Phase Transition and Pyroelectric Properties in Pb(Zn1/3Nb2/3)O3-PZT Based System
Authors: Lian Jingyu , Yamanishi Katsuya , Adachi Masatoshi , Shiosaki Tadashi , Kawabata Akira
Published: March 2014

The influence of partially disordered perovskite oxide PZN (Pb(Zn1/3Nb2/3)O3) and doping additive MnO2 on FR(LT)-FR(HT) phase transition in PZT-PZN ceramics and their pyroelectric properties have been investigated with the purpose of application to sensors. The thermal hysteresis of pyroelectric coefficient during FR(LT)-FR(HT) phase transition was reduced to be almost zero in 0.07PbTiO3-0.80PbZrO3-0.13Pb(Zn1/3Nb2/3)O3. By doping MnO2(l wt%) as a additive to 0.07PbTiO3-0.88PbZrO3-0.05Pb(Zn1/3Nb2/3)O3, a further improvement in pyroelectric properties has been obtained.
Optical Bistability in Injection Laser Diodes
Authors: Carroll J. E. , White I. H.
Published: March 2014

Optical bistability in injection laser diodes is reviewed with special emphasis on the need for lower power requirements, improved contrast ratios, and higher speeds if devices are to find applications in optical signal processing and optical memories. Recent forms of bistability suggest that the need for spatial redistribution of charge carriers can be much reduced compared to that in conventional absorptive or dispersive bistable devices. If dependence on the relatively slow recombination processes which help to spatially redistribute electrons can be removed, then there is promise for greatly improved switching speeds. Quantum well materials appear to be most promising for many of these future advances.
Application of Holographic Optical Elements in Optical Memory Devices
Authors: Linnebach R. , Gillessen K. , Germann R. , Forchel A. , Korn M. , Pilkuhn M. H. , Fröhlichn J. , Greenard S.
Published: March 2014

Computer generated Holographic Optical Elements (HOE) have been written by e-beam lithography on Al2O3 waveguides. The spectral bandwidth of HOE with Separate Input and Output Couplers (SIOC-HOE) was 0.7 nm compared to more than 9 nm of HOE with Convolved Input and Output Coupler (CIOC-HOE). The beam waist in the focus can be explained in terms of the natural beam waist and the spectral displacement of the focal point. The coupling efficiency of HOEs with beam splitting characteristic could be modeled. An integrated pickup device for an optical storage medium was realized with CIOC-HOEs.
Persistent Photochemical Hole Burning and Subpicosecond Photon Echoes by Using Diode Laser
Authors: Nakatsuka Hiroki , Inouye Kazuki , Uemura Sadao , Mishinan Tomobumi , Yano Ryuzi
Published: March 2014

We have observed photochemical hole burning in 1,3,3,1',3',3'-hexamethyl-2,2'indotricarbocyanine iodide embedded in polyvinyl alcohol using a single mode diode laser. Measured homogeneous widths followed a power law temperature dependence with exponent 1.3. We have also observed subpicosecond incoherent light accumulated photon echoes using a conventional cw multimode diode laser. The homogeneous widths obtained by the two methods agreed within experimental accuracy.
Enhanced 8–10 Conversion Code for High Density Recording
Authors: Tanaka Shin-ichi , Ishibashi Hiromichi , Takagi Yuji , Kurahashi Akira , Okazaki Yukinori
Published: March 2014

A modulation code suitable for magneto-optical recording has been studied. The 8-10 code, proposed in this paper, is written in a 5/10, 2/10 or 8/10 code. The study clarifies that the 8-10 code enables high density recording in noisy conditions.
Acousto-Optic Accessing in Optical Disks
Authors: Matsumoto Kiyoshi , Maeda Takeshi
Published: March 2014

An acousto-optic deflector has been used as a fine actuator to improve the ability to pull in a track. Combining this A/O system with split optics which make it possible to get high acceleration, we have achieved an access time without latency of 14 ms in a 12'' optical disk system.
High Sensitive Magneto-Optical Media with New Types of Protective Film
Authors: Asano Mutsumi , Misaki Hidehiko , Shibutami Tetsuo , Kasai Kiyoshi , Fukuda Mitsutoshi , Imamura Nobutake
Published: March 2014

SiCN:H and SiN:H have been studied for use as protective films of magneto-optical (MO) media. These films were sputter-deposited from an Si target in atmosphere containing hydrogen. Both compounds exhibited substantially improved affinities over conventional nitride compounds used as protective films for the polycarbonate substrate of the MO media. In addition to providing superior protection and Kerr rotation enhancement, SiCN:H and SiN:H films had a distinctive advantage that the use of them as protective films reduced the write laser power of the MO media. This feature satisfies the need of higher sensitive MO media applicable to high speed driving of up to 3600 rpm.
Recording Power Characteristics of 130 mm Overwritable MO Disk by Laser Power Modulation Method
Authors: Iida Haruhisa , Matsumoto Hiroyuki , Saito Jun , Sato Masatoshi , Akasaka Hideki
Published: March 2014

The authors investigate the recording power characteristics of 130 mm overwritable MO disk by laser power modulation method. At 2400 rpm, the laser power of 11 mW on disk is enough to record marks on our disk. When we choose the recording conditions properly, P
L power margin of ±20% is attained at overall area of the disk.
Optical Properties of TbFeCo Films
Authors: Grove Steven L. , Challener William A.
Published: March 2014

The complex refractive index of magneto-optic alloys can be determined from near-normal incidence reflectance, transmittance, and magneto-optic measurements. Results of measurements from 400 to 850 nm on a range of TbFeCo alloys are presented. Within this range, the refractive indices n and K do not vary substantially. However, a large variation is found for the MO coefficients, Δ
n and Δ
K. The MO effect is enhanced by the proper ratio of Fe and Co, and by reducing the concentration of Tb.
Protecting and Enhancing Eyewitness Memory: The Impact of an Initial Recall Attempt on Performance in an Investigative Interview
Authors: Hope Lorraine , Gabbert Fiona , Fisher Ronald P. , Jamieson Kat
Published: March 2014

Evidence‐gathering begins at the scene of an incident. Available witnesses may be asked to provide an account of what happened, either in response to an open request for information or, in some regions, by completing a Self‐Administered Interview (SAI©). In both cases, an investigative interview may be conducted at some later date. This study sought to determine the impact of an initial retrieval attempt on a subsequent interview. After exposure to a mock crime, participants completed an SAI© or a free recall (FR), or did not engage in an initial retrieval (Control). One week later, participants were interviewed with a Cognitive Interview. SAI© participants reported more correct information and maintained higher accuracy than FR and Control participants. Consistency analyses revealed that the SAI© was effective because it preserved more of the originally recalled items (Time 1) than did an initial FR, and not because it yielded new recollections at Time 2. Copyright © 2014 John Wiley & Sons, Ltd.
CO2 capture from dry flue gas by vacuum swing adsorption: A pilot plant study
Authors: Krishnamurthy Shreenath , Rao Vemula Rama , Guntuka Sathishkumar , Sharratt Paul , Haghpanah Reza , Rajendran Arvind , Amanullah Mohammad , Karimi Iftekhar A. , Farooq Shamsuzzaman
Published: March 2014

The capture and concentration of CO2 from a dry flue gas by vacuum swing adsorption (VSA) has been experimentally demonstrated in a pilot plant. The pilot plant has the provision for using two coupled columns that are each packed with approximately 41 kg of Zeochem zeolite 13X. Breakthrough experiments were first carried out by perturbing a N2 saturated bed with 15% CO2 and 85% N2 feed, which is representative of a dry flue gas from coal‐fired power plants. The breakthrough results showed long plateaus in temperature profiles confirming a near adiabatic behavior. In the process study, a basic four‐step vacuum swing adsorption (VSA) cycle comprising the following steps: pressurization with feed, adsorption, forward blowdown, and reverse evacuation was investigated first. In the absence of any coupling among the steps, a single bed was used. With this cycle configuration, CO2 was concentrated to 95.9 ± 1% with a recovery of 86.4 ± 5.6%. To improve the process performance, a four‐step cycle with light product pressurization (LPP) using two beds was investigated. This cycle was able to achieve 94.8 ± 1% purity and 89.7 ± 5.6% recovery. The Department of Energy requirements are 95% purity and 90% recovery. The proposed underlying physics of performance improvement of the four‐step cycle with LPP has also been experimentally validated. The pilot plant results were then used for detailed validation of a one‐dimensional, nonisothermal, and nonisobaric model. Both transient profiles of various measured variables and cyclic steady state performance results were compared with the model predictions, and they were in good agreement. The energy consumptions in the pilot plant experiments were 339–583 ± 36.7 kWh tonne−1 CO2 captured and they were significantly different from the theoretical power consumptions obtained from isentropic compression calculations. The productivities were 0.87–1.4 ± 0.07 tonne CO2 m−3 adsorbent day−1. The results from our pilot plant were also compared with available results from other pilot plant studies on CO2 capture from flue gas. © 2014 American Institute of Chemical Engineers AIChE J, 60: 1830–1842, 2014
Kompensatorische Anpassungen der strukturellen Dynamik eines intrinsisch unstrukturierten Protein‐Komplexes
Authors: Kurzbach Dennis , Schwarz Thomas C. , Platzer Gerald , Höfler Simone , Hinderberger Dariush , Konrat Robert
Published: March 2014

Intrinsisch unstrukturierte Proteine (IUPs) spielen eine zentrale Rolle in Proteininteraktionsnetzwerken als wichtige Knotenpunkte und Kopplungsstellen. Hier zeigen wir mit einer Kombination aus NMR‐ und ESR‐Spektroskopie, dass die Bindung des Cytokins Osteopontin an seinen natürlichen Liganden Heparin von thermodynamisch kompensierend wirkenden Strukturanpassungen begleitet wird: Das Kernsegment des OPN entfaltet sich, und dieses “Entfalten durch Bindung” kompensiert entropische Verluste durch die Heparinbindung. Es wird gezeigt, dass dieser Prozess primär durch elektrostatische Wechselwirkungen zwischen Heparin und geladenen Regionen entlang des Proteinrückgrats bestimmt wird. Dieses Wechselspiel zwischen Struktur und Thermodynamik ist auch von grundlegender Bedeutung für IUPs zur schnellen Substratbindung und ‐freisetzung innerhalb von Wechselwirkungsnetzwerken.
Lemierre's syndrome after evacuation of the uterus: a case report
Authors: Hedengran Katrine Kaare , Hertz Jens
Published: March 2014

Key Clinical Message

Even minor surgical interventions can have serious complications. Lemierre's syndrome is rare and to our best knowledge never before described after gynecological surgery; however, it should be considered in case of rapidly developing respiratory problems after even simple surgical procedures.
Dendrimer‐Encapsulated Cobalt Nanoparticles as High‐Performance Catalysts for the Hydrolysis of Ammonia Borane
Authors: Aranishi Kengo , Zhu Qi‐Long , Xu Qiang
Published: March 2014

Dendrimer‐encapsulated Co nanoparticles (G6‐OH(Co60)) have been synthesized through the complexation of Co2+ cations to the internal tertiary amine of sixth‐generation hydroxyl‐terminated poly(amidoamine) dendrimers followed by reduction by both sodium borohydride and ammonia borane in aqueous solution. The highly dispersed G6‐OH(Co60), in which the average diameter of Co nanoparticles is approximately 1.6±0.4 nm, have been confirmed by TEM analysis. The catalytic activity of G6‐OH(Co60) for the hydrolysis of ammonia borane has been studied in aqueous solution at different reaction temperatures, demonstrating a high catalytic performance.
ChemInform Abstract: Magnetic Structure and Properties of the Rechargeable Battery Insertion Compound Na2FePO4F.
Authors: Avdeev Maxim , Ling Chris D. , Tan Thiam Teck , Li Sean , Oyama Gosuke , Yamada Atsuo , Barpanda Prabeer
Published: March 2014

Na2FePO4F is prepared by solid state reaction of an equimolar mixture of NaF, NaHCO3, FeC2O4, and NH4H2PO4 (argon, 300 °C, 2 h) followed by annealing of the pelletized product (argon, 600 °C, 8 h).
ChemInform Abstract: Structural and Magnetic Study of Order—Disorder Behavior in the Double Perovskites Ba2Nd1‐xMnxMoO6.
Authors: Coomer Fiona C. , Cussen Edmund J.
Published: March 2014

Ba2Nd1‐xMnxMoO6 (0 < x ≤ 1) is prepared by calcination of stoichiometric mixtures of BaCO3, Nd2O3, MnO2, and MoO3 (air, 500—800 °C, 8 h) followed by solid state thermal reduction (5%H2/N2, 1250 °C, 2 d).
ChemInform Abstract: Metal Oxychlorides as Cathode Materials for Chloride Ion Batteries.
Authors: Zhao Xiangyu , Zhao‐Karger Zhirong , Wang Di , Fichtner Maximilian
Published: March 2014

The electrochemical performance and the reaction mechanisms of BiOCl and FeOCl cathodes for chloride ion batteries are investigated.
ChemInform Abstract: An Adaptable and Dynamically Porous Organic Salt Traps Unique Tetrahalide Dianions.
Authors: Marti‐Rujas Javier , Meazza Lorenzo , Lim Gin Keat , Terraneo Giancarlo , Pilati Tullio , Harris Kenneth D. M. , Metrangolo Pierangelo , Resnati Giuseppe
Published: March 2014

Thermal treatment of microcrystalline trihalides (II) affords the [I4]2‐ tetraiodide anion and its unique [I2Br2]2‐ and [I2Cl2]2‐ mixed analogs as uniform and microcrystalline salts (III) in nearly quantitative yield.
ChemInform Abstract: The Borosulfate Story Goes on — From Alkali and Oxonium Salts to Polyacids.
Authors: Daub Michael , Kazmierczak Karolina , Hoeppe Henning A. , Hillebrecht Harald
Published: March 2014

The crystal structures of (III), (V), and (VII)—(IX) are determined by single crystal XRD.
ChemInform Abstract: A Novel 3D Metal—Organic Framework with Silver Iodide Anion Cluster [Ag14I16]2‐ as Node: Synthesis, Structure, and Fluorescence Property.
Authors: Xu Wei‐Xia , Zhou Wei‐Xia , Li Jun , Huang Shi‐Liang , Niu Jiao , Zhang Feng‐Xing
Published: March 2014

Colorless block crystals of [Ag14I16(HDABCO)2]·DABCO are synthesized from AgI dissolved in saturated KI solution and DABCO in EtOH (room temperature, 14 d, 51% yield).
ChemInform Abstract: Thiol‐Ene Click Reactions — Versatile Tools for the Modification of Unsaturated Amino Acids and Peptides.
Authors: Karmann Lisa , Kazmaier Uli
Published: March 2014

A photolytic process is developed for the high yielding regioselective addition of a variety of thiols to N‐protected allyl‐glycine.
ChemInform Abstract: Lewis Acid—Surfactant‐Combined Catalyzed Synthesis of 4‐Aminocyclopentenones from Glycals in Water.
Authors: Wang Siming , William Ronny , Seah Kim Kui Georgina Estelle , Liu Xue‐Wei
Published: March 2014

A facile methodology for the stereoselective construction of biologically significant 4‐aminocyclopentenones from readily available glycals and secondary arylamines is developed.
ChemInform Abstract: Scalable and Divergent Total Synthesis of (+)‐Colletoic Acid, a Selective 11β‐Hydroxysteroid Dehydrogenase Type 1 Inhibitor.
Authors: Ling Taotao , Griffith Elizabeth , Mitachi Katsuhiko , Rivas Fatima
Published: March 2014

An efficient and divergent total synthesis of (+)‐colletoic acid (I), a selective 11‐β hydroxysteroid dehydrogenase 1 inhibitor, is presented along with its biological activity at the whole‐cell level.
ChemInform Abstract: Iridium‐Catalyzed Direct Arene C—H Bond Amidation with Sulfonyl‐ and Aryl Azides
Authors: Lee Donggun , Kim Youngchan , Chang Sukbok
Published: March 2014

50 examples
ChemInform Abstract: Practical Metal‐Free Synthesis of Chalcone Derivatives via a Tandem Cross‐Dehydrogenative‐Coupling/Elimination Reaction.
Authors: Wei Yu , Tang Jinghua , Cong Xuefeng , Zeng Xiaoming
Published: March 2014

A variety of (E)‐chalcones is readily prepared by reaction of ketones with benzylamines in the presence of ammonium persulfate.
ChemInform Abstract: Synthesis and Transistor Properties of Asymmetric Oligothiophenes: Relationship Between Molecular Structure and Device Performance.
Authors: Park Chan Eon , et al. et al.
Published: March 2014

The new compounds (I)‐(III) show parallel stacking in the thin film state and good field‐effect mobility.
ChemInform Abstract: “One Pot” Regiospecific Synthesis of Polysubstituted Pyrroles from Benzylamines and Ynones under Metal Free Conditions.
Authors: Shen Jinhai , Cheng Guolin , Cui Xiuling
Published: March 2014

A practical one‐pot procedure for the synthesis of polysubstituted pyrroles is reported.
ChemInform Abstract: Advances in Drug Design and Discovery. Part 25. Hybrid Benzofuran—Bisindole Derivatives: New Prototypes with Promising Antihyperlipidemic Activities.
Authors: Sashidhara Koneni V. , Modukuri Ram K. , Sonkar Ravi , Rao K. Bhaskara , Bhatia Gitika
Published: March 2014

19 Title compounds of type (III) are prepared and evaluated in vitro for their antioxidant and in vivo for antidyslipidemic activities.
ChemInform Abstract: Tandem Michael Addition/Isocyanide Insertion into the C—C Bond: A Novel Access to 2‐Acylpyrroles and Medium‐Ring Fused Pyrroles.
Authors: Zhang Lingjuan , Xu Xianxiu , Shao Qiu‐rong , Pan Ling , Liu Qun
Published: March 2014

The base‐promoted reaction of cyclic enediones with isocyanides (II) leads to 7‐ and 8‐membered‐ring fused pyrroles (III) in moderate yields.
ChemInform Abstract: Expanding the Scope of the Indium‐Promoted Allylation Reaction: 4‐(Bromomethyl)‐1,3‐dioxol‐2‐one as a Synthetic Equivalent of a 3‐Arylhydroxyacetone Enolate.
Authors: Bigovic Miljan , Skaro Sanja , Maslak Veselin , Saicic Radomir N.
Published: March 2014

Cyclic enol carbonates (I), obtained via the indium‐promoted allylation of aldehydes with 4‐(bromomethyl)‐1,3‐dioxol‐2‐one, undergo a Heck reaction with aryl iodides in the presence of silver trifluoroacetate to give the corresponding arylated products.
ChemInform Abstract: Unexpected Regioselectivities of [3 + 2] Cycloaddition of Azomethine Imines to Acrylonitrile and 4‐Nitrophenyl Vinyl Sulfone.
Authors: Pleshchev Mikhail I. , Kachala Vadim V. , Goloveshkin Alexander S. , Bushmarinov Ivan S. , Kuznetsov Vladimir V. , Khakimov Dmitriy V. , Makhova Nina N.
Published: March 2014

The [3 + 2] cycloaddition of azomethinimines generated in situ from (I) to acrylonitrile (II) or 4‐nitrophenyl sulfone (V) proceeds with high diastereoselectivity but with opposite regioselectivity.
ChemInform Abstract: A New Synthesis of Sultams from Amino Alcohols.
Authors: Lad Nitin , Sharma Rajiv , Marquez Victor E. , Mascarenhas Malcolm
Published: March 2014

N,O‐Dimesylate derivatives of amino alcohols undergo base‐mediated cyclization to give five‐ and six‐membered sultams.
ChemInform Abstract: 3‐(3‐Butylamino‐2‐hydroxy‐propoxy)‐1‐hydroxy‐xanthen‐9‐one Acts as a Topoisomerase IIα Catalytic Inhibitor with Low DNA Damage.
Authors: Park So‐Eun , Chang In‐Hye , Jun Kyu‐Yeon , Lee Eunyoung , Lee Eung‐Seok , Na Younghwa , Kwon Youngjoo
Published: March 2014

Several new aminoalkylxanthone derivatives (III) (8 examples) are synthesized by alkylamine mediated epoxide ring opening reaction of compounds (I), and evaluated for their pharmacological activities.
ChemInform Abstract: Asymmetric Synthesis of Chiral Dihydrothiopyrans via an Organocatalytic Enantioselective Formal Thio [3 + 3] Cycloaddition Reaction with Binucleophilic Bisketone Thioethers.
Authors: Zhang Wannian , et al. et al.
Published: March 2014

An unprecedented organocatalytic formal [3 + 3] cycloaddition process is described to yield 3,4‐dihydro‐2H‐thiopyrane derivatives from thiodiketones and cinnamic aldehydes.
ChemInform Abstract: Synthesis, in vitro Evaluation and Molecular Modelling of Naphthalimide Analogues as Anticancer Agents.
Authors: Verma Meenakshi , Luxami Vijay , Paul Kamaldeep
Published: March 2014

11 Title compounds of type (V) are prepared and are evaluated for in vitro antitumor activities against 60 tumor cell lines.
ChemInform Abstract: Microwave‐ and Ultrasound‐Assisted Synthesis of Some Acyclonucleobases Based on a Uracil Moiety Using DMAP as Base.
Authors: Lahsasni Siham A.
Published: March 2014

Microwave or ultrasound methodologies, resp., afford higher yields in shorter reaction times compared to thermal procedure.
ChemInform Abstract: Facile One‐Pot Synthesis of the Pyrazolo[1,5‐a]pyrazine Scaffold.
Authors: Zaremba O. V. , Gorobets N. Yu. , Kovalenko S. S. , Drushlyak O. G. , Grevtsov O. Yu. , Kovalenko S. M.
Published: March 2014

Title compounds (III) are synthesized by three‐component condensation through amide formation, pyrazine ring closure, and hydrolysis/dehydration.
ChemInform Abstract: Mannich Reaction in the Synthesis of N,S‐Containing Heterocycles. Part 16. Synthesis of Derivatives of Tetrahydropyrido[1,2‐a][1,3,5]triazine and 5,6,12,13‐Tetrahydro‐1H,8H‐dipyrido[1,2‐a:1′,2′‐e][1,3,5,7]tetrazocine.
Authors: Dotsenko V. V. , Suikov S. Yu. , Pekhtereva T. M. , Krivokolysko S. G.
Published: March 2014

The base‐mediated aminomethylation of 6‐amino‐4‐aryl‐2‐thioxo‐1,2‐dihydropyridine‐3,5‐dicarbonitriles (I) provides access to pyridotriazine and tetrazocine derivatives in ratios depending strongly on the structure of the initial amine, the ratio of regents, and the reaction conditions.
ChemInform Abstract: Synthesis and Antimicrobial Activity of 3‐Aryl‐2,6‐diphenylimino‐4‐S‐hepta‐O‐benzoyl‐lactosyl‐2,3‐dihydro‐1,3,5‐ thiadiazine Hydrochlorides.
Authors: Deshmukh Reena J. , Deshmukh Shirish P.
Published: March 2014

All new compounds (III) (7 examples) show antibacterial and antifungal activities similar to the standards amikacin and fluconazole.
ChemInform Abstract: Efficient Asymmetric Synthesis of Lamivudine via Enzymatic Dynamic Kinetic Resolution.
Authors: Hu Lei , Schaufelberger Fredrik , Zhang Yan , Ramstroem Olof
Published: March 2014

The protease subtilisin Carlsberg treated with octyl β‐D‐glucopyranoside and Brij 56 surfactants is used for the novel enzymatic DKR reaction of dithianediol (I) with aldehyde (II) and phenyl acetate.
ChemInform Abstract: Hydrazone‐based Dysprosium Single Molecule Magnets
Authors: Zhang Peng , Zhang Li , Tang Jinkui
Published: March 2014

Review: 50 refs.
ChemInform Abstract: Recent Developments in the Catalytic, Asymmetric Construction of Pyrroloindolines Bearing All‐Carbon Quaternary Stereocenters
Authors: Repka Lindsay M. , Reisman Sarah E.
Published: March 2014

Review: 45 refs.
ChemInform Abstract: Synthetic and Structural Studies on High‐Nuclearity Silver Ethynide Cluster Systems
Authors: Xie Yun‐Peng , Mak Thomas C. W.
Published: March 2014

Review: 83 refs.
ChemInform Abstract: Synthesis of Carbocyclic and Heterocyclic β‐Aminocarboxylic Acids
Authors: Kiss Lorand , Fulop Ferenc
Published: March 2014

Review: 330 refs.
ChemInform Abstract: Bimetallic Combinations for Dehalogenative Metalation Involving Organic Compounds
Authors: Tilly David , Chevallier Floris , Mongin Florence , Gros Philippe C.
Published: March 2014

Review: 275 refs.
ChemInform Abstract: Electrochemical Behavior of Alkaloids: Detection and Interaction with DNA and Proteins
Authors: Simanek Vilim , Zatloukalova Martina , Vacek Jan
Published: March 2014

Review: 126 refs.
ChemInform Abstract: Colloid‐Chemical Aspects of Protein Crystallization
Authors: Kulichikhin V. G. , Yampolskaya G. P.
Published: March 2014

Review: 106 refs.
ChemInform Abstract: The Combination of Chemotherapy and Radiotherapy Towards More Efficient Drug Delivery
Authors: Cao Wei , Gu Yuwei , Meineck Myriam , Xu Huaping
Published: March 2014

Review: 25 refs.
ChemInform Abstract: Biomass Feedstocks for Renewable Fuel Production: A Review of the Impacts of Feedstock and Pretreatment on the Yield and Product Distribution of Fast Pyrolysis Bio‐Oils and Vapors
Authors: Carpenter Daniel , Westover Tyler L. , Czernik Stefan , Jablonski Whitney
Published: March 2014

Review: 161 refs.
Band‐Structure Engineering of ZnO by Anion–Cation Co‐Doping for Enhanced Photo‐Electrochemical Activity
Authors: Pan Jing , Wang Shudong , Chen Qian , Hu Jingguo , Wang Jinlan
Published: March 2014

To look for efficient visible light‐driven catalysts for photo‐electrochemical (PEC) water‐splitting, the band structure and optical absorption of monodoped, compensated, and noncompensated n–p pairs of co‐doped bulk ZnO are systemically studied by using both general gradient approximation and hybrid density functional theory approaches (PBE and HSE). Calculations show that n–p co‐doping cannot only enhance the stability that stems from the strong electrostatic attraction between the n‐ and p‐type dopants, but also effectively reduce the band‐gap of ZnO. More importantly, compensated (Ti+C) and noncompensated (Sc+C) and (Cr+C) co‐doped ZnO may be compelling candidates for PEC water‐splitting because of their narrowed band‐gaps, potentially reduced electron–hole recombination centers, appropriate band‐edge positions, enhanced optical absorption, and good stability.