T. M. Almeida, M. S. Piedade, P. C. Lopes, L. Sousa, J. Germano, F. Cardoso, H. A. Ferreira, P. P. Freitas
This paper presents the modelling of a magnetic biosensor included on a hand held microsystem based on a fully integrated magnetoresistive biochip for biomolecular recognition (DNA hybridisation, antibody antigen interaction, etc.). The biochip uses magnetic field arraying of magnetically tagged biomolecules and high sensitivity sensors which can be used to detect single or few biomolecules. The biosensor has an matrix-array structure and each biosensor site consists of a thin film diode in series with a magnetic tunnel junction. Schottky and pin diodes are used as temperature sensors and...
XVIII IMEKO World Congress
· TC13
· 2006
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T. Katsumata, H. Aizawa, Y. Kakinuma, E. Matashige, S. Komuro, T. Morikawa
Non-destructive evaluation technique of the foods including starches has been developed based on photoluminescence from starches in the foods. The visible PL with broad peak at wavelength of λ = 462 nm are observed from various foods including starches, such as polished rice, flour and corn starch, under illumination of ultra-violet (UV) light at λ = 365 nm. Peak intensity is found to vary with the source and the breed of the specimens. PL images from starches also reveal the uniformity of the food products. Two-dimensional images of PL, which revealed the uniformity of foods under UV...
XVIII IMEKO World Congress
· TC13
· 2006
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Vaclav Papez, Stanislava Papezova
This paper describes a system, which enables quantitative monitoring and evaluation of the influence of a pulse magnetic field on a live organism by using of bioimpedance measurement. There are presented results of performed experiments.
XVIII IMEKO World Congress
· TC13
· 2006
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Rodrigo P. B. da Costa-Felix, André Victor Alvarenga, Marissa A. Rivera Cardona
Aiming to support the national metrology on ultrasound, Inmetro, the Brazilian National Institute of Metrology (NMI), has been putting effort on its Laboratory of Ultrasound (Labus). In a first approach, Labus is able to offer traceability in basically four general areas: Ultrasonic (US) Transducer Calibration, US Power Measurement, US Field Mapping, and Reference Materials Certification for US applications. The frequency range Labus firstly established its calibration and testing methods is from 0.5 MHz to 20 MHz, being the limits dependent on the particular application considered. So far,...
XVIII IMEKO World Congress
· TC13
· 2006
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Marissa A. Rivera Cardona, André Victor Alvarenga, Rodrigo P. B. da Costa-Felix
The primary level ultrasonic output power measurement service is being set up at the Laboratory of Ultrasound (Labus) of Inmetro, based on the standard IEC 61161. Labus´ main purpose is to provide support, in accordance with procedures developed by its services, to industry, to calibration laboratories, and to final consumers (patients, for instance). Labus’ clients will have means and necessary data to obtain, between other things, pre-market approvals of new models or equipment, laboratory accreditation, and on demand checks of equipment already being in use. These procedures will ensure...
XVIII IMEKO World Congress
· TC13
· 2006
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Luís Pina Soares, Raul Carneiro Martins
In this paper we present an improved method for the acquisition, filtering, compression and clinical parameter identification of the ECG. The method involves the use of an improved instrumentation setup with high resolution and sample rate, as well as DSP monitored automatic gain and offset control (AGOC) which maximizes the range of the signal. It also involves the fitting of the signal with a nonlinear model consisting of six generalized Gaussians (with skew). The method further includes the use of sinefitting techniques to selectively remove electromagnetic interference such as the...
XVIII IMEKO World Congress
· TC13
· 2006
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Jarkko Mäkiranta, Jukka Lekkala
This paper represents an experimental iteration of a novel magnetic nanoparticle (MNP) sensor. MNPs can be used as labels in quantitative diagnostic. Planar microcoils in an impedance bridge are used to measure the amount of the particles. Particles change the inductance of the coil due to their permeability. The shape and size of the coil are critical to the sensitivity and robustness. Experimental measurements supported by numerical simulations have been used in sensor designing, improving and optimization.
XVIII IMEKO World Congress
· TC13
· 2006
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J.T. Filho, L.R. Lidízio, L.A. Sena, J.C. Damasceno, C.A. Achete
The growth of titanium oxide layer on titanium surface by the micro-arc oxidation technique was investigated. Ca(CH 3 COO) 2 (0.3M), Na 2 CO 3 (0.6M) and Na 2 HPO 4 (0.1M) solutions were employed as electrolytes. SEM and EDS microanalysis were used for morphology, composition characterization and low-angle X-ray diffraction to describe titanium oxide crystallographic orientation. TiO 2 films formed by using 0.3M Ca(CH 3 COO) 2 and 0.1M Na 2 HPO 4 solutions showed a porous, homogeneous surface structure, with presence of phosphorous and after an hydrothermical treatment using a Ca(OH) 2...
XVIII IMEKO World Congress
· TC13
· 2006
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Gregor Geršak, Valentin Batagelj, Janko Drnovšek
In this paper a simple educational model of a non-invasive blood pressure measurement device, based on the oscillometric principle is presented. The device is composed of a pressure transducer, auxiliary instrumentation for signal acquirement and digital signal processing module in the LabVIEW environment. Since the most problematic part of metrological evaluation of oscillometric devices is in proprietary algorithms of determining systolic and diastolic blood pressure, two basic algorithms are discussed. The amplitude algorithm is used for building the virtual instrument (VI). Preliminary...
XVIII IMEKO World Congress
· TC13
· 2006
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Elton Gomes Pereira
Two methods of radiological survey in a medical X ray room are compared. The first method is just the usual one, as done today in Brazil. It is based on the election of a high voltage (HV) value, by legal rule the highest used in the clinic, taken as a standard. This highest HV value is supposed to be constant and representative of all others values, which are simply ignored. This work shows that the results of this approach move away a bit from the actual radiation doses, overestimating the values. A second method is proposed and compared with the first one. It takes the various values of...
XVIII IMEKO World Congress
· TC13
· 2006
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