Search Results - "Silfsten, Pertti"

Detection of porosity of pharmaceutical compacts by terahertz radiation transmission and light reflection measurement techniques by Bawuah, Prince, Pierotic Mendia, Alessandra, Silfsten, Pertti, Pääkkönen, Pertti, Ervasti, Tuomas, Ketolainen, Jarkko, Zeitler, J. Axel, Peiponen, Kai-Erik

“…[Display omitted] We report on the non-destructive quantification of the porosity of pharmaceutical compacts (microcrystalline cellulose tablets) by using both…”
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A prototype of an optical sensor for the identification of diesel oil adulterated by kerosene by Kanyathare, Boniphace, Kuivalainen, Kalle, Räty, Jukka, Silfsten, Pertti, Bawuah, Prince, Peiponen, Kai-Erik

“…Background Liquid fuel adulteration has several far-reaching impacts such as environmental pollution. A widespread practice is typically the adulteration of…”
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A Study on the Resolution of a Terahertz Spectrometer for the Assessment of the Porosity of Pharmaceutical Tablets by Ervasti, Tuomas, Silfsten, Pertti, Ketolainen, Jarkko, Peiponen, Kai-Erik

“…In this study, the resolution of a time-domain terahertz spectrometer for tablet porosity measurements was estimated using two sets of pharmaceutical tablets…”
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Dispersion relations for evaluating the complex refractive index of medium without the information of its thickness by Peiponen, Kai-Erik, Vartiainen, Erik M., Unuma, Takeya, Axel Zeitler, J., Silfsten, Pertti, Venäläinen, Tapani, Kishida, Hideo

“…A general method to obtain the complex refractive index of a medium from absorbance, or alternatively from optical path length data, without knowing the sample…”
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Characterization of porous media based on the polarimetric matrix models by Savenkov, Sergey, Priezzhev, Alexander, Oberemok, Yevgen, Kolomiets, Ivan, Silfsten, Pertti, Ervasti, Tuomas, Ketolainen, Jarkko, Peiponen, Kai-Erik

“…In this paper, we measured the Mueller matrices of the samples with different porosity in the visible range (the wavelength of the input radiation ) for the…”
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Far infrared (THz) absorption spectra for the quantitative differentiation of calcium carbonate crystal structures: Exemplified in mixtures and in paper coatings by Bawuah, Prince, Kiss, Márton Zsolt, Silfsten, Pertti, Tåg, Carl-Mikael, Gane, Patrick A. C., Peiponen, Kai-Erik

“…In this paper, far-infrared (FIR) spectroscopic techniques have been employed to detect different calcium carbonate crystal concentrations in powder mixtures…”
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Non-contact weight measurement of flat-faced pharmaceutical tablets using terahertz transmission pulse delay measurements by Bawuah, Prince, Silfsten, Pertti, Ervasti, Tuomas, Ketolainen, Jarkko, Zeitler, J. Axel, Peiponen, Kai-Erik

“…[Display omitted] By measuring the time delay of a terahertz pulse traversing a tablet, and hence its effective refractive index, it is possible to…”
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Kramers-Kronig analysis on the real refractive index of porous media in the terahertz spectral range by Silfsten, Pertti, Kontturi, Ville, Ervasti, Tuomas, Ketolainen, Jarkko, Peiponen, Kai-Erik

“…We present a terahertz time-domain experimental technique for the detection of scattering from porous media. The method for detection of the scattering enables…”
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Finite Frequency f-Sum Rule for Assessment of Number Density of Gold Nanoparticles (AuNPs) and Kramers—Kronig Relation for Refractive Index of Colloidal Gold by Kontturi, Ville, Silfsten, Pertti, Peiponen, Kai-Erik

“…Absorption spectra from colloids containing different concentrations of spherical gold nanoparticles in water were measured with a spectrophotometer. The…”
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On the complex refractive index of N-doped TiO2 nanospheres and nanowires in the terahertz spectral region by Bawuah, Prince, Silfsten, Pertti, Sarkar, Anjana, Kordas, Krisztian, Mikkola, Jyri-Pekka, Peiponen, Kai-Erik

“…In this paper, the terahertz (THz) transmission measurement technique was applied to characterize titanium dioxide (TiO2) nanospheres and nanowires subjected…”
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An optical method for continuous monitoring of the dissolution rate of pharmaceutical powders by Laitinen, Riikka, Lahtinen, Jani, Silfsten, Pertti, Vartiainen, Erik, Jarho, Pekka, Ketolainen, Jarkko

“…Monitoring systems providing fast and reliable, even on-line data, from a distinct process stage or final product are needed in drug development, from the…”
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A Tape Method for Fast Characterization and Identification of Active Pharmaceutical Ingredients in the 2-18 THz Spectral Range by Kissi, Eric Ofosu, Bawuah, Prince, Silfsten, Pertti, Peiponen, Kai-Erik

“…In order to find counterfeit drugs quickly and reliably, we have developed ‘tape method’ a transmission spectroscopic terahertz (THz) measurement technique and…”
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On the complex refractive index of N-doped TiO 2 nanospheres and nanowires in the terahertz spectral region by Bawuaha, Prince, Silfsten, Pertti, Sarkar, Anjana, Kordas, Kristian, Mikkola, Jyri-Pekka, Peiponen, Kai-Erik

“…In this paper, the terahertz (THz) transmission measurement technique was applied to characterize titanium dioxide (TiO 2 ) nanospheres and nanowires subjected…”
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Roughened Glass Slides and a Spectrophotometer for the Detection of the Wavelength-Dependent Refractive Index of Transparent Liquids by Niskanen, Ilpo, Räty, Jukka, Myllylä, Risto, Sutinen, Veijo, Matsuda, Kiyofumi, Homma, Kazuhiro, Silfsten, Pertti, Peiponen, Kai-Erik

“…We describe a method to determine the wavelength-dependent refractive index of liquids by measurement of light transmittance with a spectrophotometer. The…”
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On Optical Properties of Dilute Colloidal Gold by Kontturi, Ville, Silfsten, Pertti, Räty, Jukka, Peiponen, Kai-Erik

“…Wavelength-dependent complex effective refractive index of dilute colloidal gold, i.e., spherical gold nanoparticles in water was measured using a…”
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Color sensitive retina based on bacteriorhodopsin by Frydrych, Michael, Silfsten, Pertti, Parkkinen, Sinikka, Parkkinen, Jussi, Jaaskelainen, Timo

“…Bacteriorhodopsin (BR), a membrane protein of a microorganism Halobacterium salinarium has been studied since the 80’s as a potential material for information…”
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Quasistatic thermo-optical changes of acrylonitride-butadiene-styrene surface induced by laser beam by Silvennoinen, Raimo, Myller, Kari, Peiponen, Kai-Erik, Silfsten, Pertti

“…Surface quality of plastic material acrylonitride-butadiene-styrene (ABS) in a polycarbonate (PC) blend was investigated by probing samples obtained from…”
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