نتایج جستجو برای: quartz crystal

تعداد نتایج: 168447  

2012
Ana María Cao-Paz Loreto Rodríguez-Pardo José Fariña Jorge Marco Acevedo

In battery applications, particularly in automobiles, submarines and remote communications, the state of charge (SoC) is needed in order to manage batteries efficiently. The most widely used physical parameter for this is electrolyte density. However, there is greater dependency between electrolyte viscosity and SoC than that seen for density and SoC. This paper presents a Quartz Crystal Microb...

2017
Marco Bau Marco Ferrari Vittorio Ferrari

A technique for contactless electromagnetic interrogation of AT-cut quartz piezoelectric resonator sensors is proposed based on a primary coil electromagnetically air-coupled to a secondary coil connected to the electrodes of the resonator. The interrogation technique periodically switches between interleaved excitation and detection phases. During the excitation phase, the resonator is set int...

کاوه ای, قاسم , کرمی, مسعود الله ,

The (Bi0.25 Sb0.75)2Te3 compound is a p-type thermoelectric semiconductor for application in thermoelectric cooling systems. To fabricate this single crystal, required elements, Bi, Sb and Te with 5N purity melted in quartz capsule at 10-6 torr pressure and rapidly quenched to room temperature. The sample crystallized by zone melting method with the rate of 8 mm per an hour at 700 oC and for...

2017
Ronald J. Bakker

Post-entrapment modifications reduce the reliability of fluid inclusions to determine trapping conditions in rock. Processes that may modify fluid inclusion properties are experimentally identified in this study using synthetic fluid inclusions in quartz with a well-defined composition and density. Modifications are characterized with microthermometry (homogenization and dissolution temperature...

Journal: :The Analyst 2005
G Zilberman A L Smith

Quartz crystal microbalance/heat conduction calorimetry (QCM/HCC) is a new measurement technology that has been used to monitor simultaneously the mass and motional resistance of a thin film in conjunction with the heat flow produced by a chemical change in the film initiated by reaction with a gas. In this work we examine the applicability of the QCM/HCC in detecting chemical changes at the so...

Journal: :Geochemistry Geophysics Geosystems 2021

Quartz-hosted melt inclusions are windows into the assembly and storage of compositionally zoned magmas systems like giant magma body responsible for 2,800 km3 Youngest Toba Tuff (YTT), Indonesia. Feldspar-sensitive element concentrations interelement ratios in YTT quartz-hosted found to cluster three discrete inclusion populations. Each population represents a small fraction overall range comp...

Journal: :Advances in Civil Engineering 2021

Using the techniques of X-ray diffraction, polarizing microscopy, uniaxial compression, and scanning electron microscopy (SEM), relationships between microfracture features mineral morphology granite were studied. The results showed that feldspar, quartz, biotite are main components samples in this study. Biotite has a self-shaped flake structure with perfect cleavage. K-feldspar lattice double...

2013
Elizabeth M. Srokowski Kimberly A. Woodhouse

The surface properties of a family of elastin-like polypeptides (ELPs), differing in molecular weight and sequence length, were investigated to understand how the nature of the polypeptide film might contribute to their thrombogenic profile. Physical adsorption of the ELPs onto Mylar increased surface wettability as the sequence length decreased while X-ray spectroscopy analysis showed an incre...

Journal: :Journal of the Royal Society, Interface 2015
Abhinav Prasad Anna Huefner Sumeet Mahajan Ashwin A Seshia

Quantifying cellular behaviour by motility and morphology changes is increasingly important in formulating an understanding of fundamental physiological phenomena and cellular mechanisms of disease. However, cells are complex biological units, which often respond to external environmental factors by manifesting subtle responses that may be difficult to interpret using conventional biophysical m...

Journal: :Chemistry 2013
Luz Marina Ballesteros Santiago Martín Javier Cortés Santiago Marqués-González Simon J Higgins Richard J Nichols Paul J Low Pilar Cea

The preparation, characterization and electrical properties of Langmuir-Blodgett (LB) films composed of a symmetrically substituted oligomeric phenylene ethynylene derivative, namely, 4,4'-[1,4-phenylenebis(ethyne-2,1-diyl)]dibenzoic acid (OPE2A), are described. Analysis of the surface pressure versus area per molecule isotherms and Brewster angle microscopy reveal that good-quality Langmuir (L...

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