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Tytuł:
Characterization of natural gas by Raman spectroscopy and its application for in-situ measurements
Autorzy:
Dąbrowski, K.
Kuczyński, S.
Włodek, T.
Smulski, R.
Barbacki, J.
Powiązania:
https://bibliotekanauki.pl/articles/298619.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
natural gas
Raman spectroscopy
Opis:
Gaseous hydrocarbons and nitrogen mixtures are characterized with an own designed portable Raman system equipped with a high pressure autoclave and fiber-optic probe. Backscattered radiation is collected through a sapphire window with a probe and transferred to the spectrometer. Samples are measured for a set of pressures in the range of 1–150 bar in ambient temperature. Measurement conditions are set to maintain an one-phase system. Spectra are collected in a wide range of wavenumber 350–3500 cm–1. Initial composition of measured samples is measured be means of gas chromatography. Design computer algorithms automatically detects and characterizes Raman bands for given species and their peak areas. The influence of both pressure and concentration of a given element on given band position and area are demonstrated.
Źródło:
AGH Drilling, Oil, Gas; 2018, 35, 1; 125-138
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The control software of the portable Raman spectrometer
Oprogramowanie sterujące przenośnym spektrometrem Raman
Autorzy:
Kwiatkowski, A.
Smulko, J.
Powiązania:
https://bibliotekanauki.pl/articles/266476.pdf
Data publikacji:
2011
Wydawca:
Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:
spektroskopia Ramana
identyfikacja
Raman spectroscopy
identification
Opis:
The paper contains a description of the control software of a portable Raman spectrometer which was built in the Department of Optoelectronics and Electronic Systems Faculty of Electronics, Telecommunications and Informatics Gdansk University of Technology. The software has modular structure, which includes the laser control module and the spectrum acquisition module (laser power selection, working mode and data acquisition time) was described. The module of Raman spectra pre-processing (smoothing, background removal, normalization) was described in detail, with particular emphasis on its ergonomic use. The software was prepared for two different user types (experienced and inexperienced), allowing use by the advanced operator or by the less experienced personnel. The Raman spectra database with updating ability by external databases was presented, together with the selected identification algorithms.
Praca zawiera opis oprogramowania sterującego przenośnym spektrometrem Ramana, który został zbudowany w Katedrze Optoelektroniki i Systemów Elektronicznych Wydziału Elektroniki, Telekomunikacji i Informatyki Politechniki Gdańskiej, w trakcie realizacji grantu rozwojowego. Opisano modułową budowę oprogramowania, zawierającego moduł sterujący pracą laserów oraz procesem akwizycji widma. Bardziej szczegółowo przedstawiono moduły realizujące funkcje wstępnego przetwarzania widm Ramana, ze szczególnym uwzględnieniem ergonomii korzystania z urządzenia w warunkach pomiarów w terenie. Oprogramowanie zrealizowano w koncepcji dwóch użytkowników (zaawansowany i podstawowy), umożliwiając tym samym obsługę urządzania przez doświadczonych operatorów oraz przez personel o ograniczonych kwalifikacjach. Przedstawiono także budowę bazy danych widm Ramana. Scharakteryzowano również algorytmy dokonujące identyfikacji widm.
Źródło:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2011, 30; 81-84
1425-5766
2353-1290
Pojawia się w:
Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Detection of illicit chemicals by portable Raman spectrometer
Autorzy:
Smulko, J.
Kwiatkowski, A.
Gnyba, M.
Powiązania:
https://bibliotekanauki.pl/articles/200103.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Raman spectroscopy
chemical detection
lasers
detection efficiency
Opis:
The Raman spectrometers can be built as the portable devices and can be used in various places to detect illicit chemicals. This method has become popular due to deficiency of other fast methods that could be applied against terrorist attacks or could help police at their work. The Conception of a portable Raman spectrometer has been presented. The Description enclosures the presentation of the prepared device and its possible applications by presenting exemplary detection results.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 4; 449-452
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Plasticization of Submicron-Structured LOVA Propellants by a Linear Dinitramine
Autorzy:
Le Brize, A.
Spitzer, D.
Powiązania:
https://bibliotekanauki.pl/articles/358697.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
nitrocellulose
RDX
DNDA6
LOVA
Raman spectroscopy
Opis:
Raman spectroscopy is a powerful tool for the analysis of complex energetic materials. In this work, this technique has been used to observe the inter-molecular interactions occurring in nitrocellulose-based propellants containing 1,3,5-trinitro-1,3,5-triazinane (RDX) and plasticized with 2,4-dinitro-2,4-diazahexane (DNDA6). The plasticization mechanism of nitrocellulose by DNDA6 was observed. RDX was found to be markedly uninvolved in chemical interactions in these matrices, hinting at a potential loss of stability in compositions for LOVA (LOw Vulnerability Ammunitions).
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 3; 547-556
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Raman spectroscopy of CdTe/ZnTe quantum dot structures
Autorzy:
Zielony, E
Placzek-Popko, E
Kamyczek, P
Henrykowski, A
Karczewski, G
Powiązania:
https://bibliotekanauki.pl/articles/174898.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
Raman spectroscopy
CdTe
ZnTe
quantum dot structures
Opis:
Semiconductor low-dimensional structures of CdTe quantum dots (QDs) embedded in ZnTe matrix have been investigated by micro-Raman spectroscopy. A reference ZnTe sample (without dots) was also studied for comparison. Both samples were grown by a molecular beam epitaxy technique on the p-type GaAs substrate. The Raman measurements have been performed at room temperature. The samples were excited by an Ar2+ laser of 514.5 nm wavelength. The Raman spectra have been recorded for different acquisition parameters of the measurement. For the reference and QD sample localized longitudinal (LO) phonons of 210 cm–1 wavenumber associated with the ZnTe layer are observed. In the case of QD sample another broadband corresponding to the LO CdTe phonon related to the QD-layer appears at a wavenumber of 160 cm–1. Such behaviour does not exhibit the Raman spectra of the reference sample. Thus the Raman measurements confirm the presence of CdTe layer of quantum dots in the investigated material. Additionally, Raman spectra for both samples exhibit tellurium-related peaks at wavenumbers around 120 cm–1 and 140 cm–1, significantly increasing with laser time exposure. It is shown that the peaks are associated with the formation of Te aggregates on the ZnTe surface due to the laser damage in the ZnTe layer.
Źródło:
Optica Applicata; 2013, 43, 1; 181-185
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Portable Raman spectrometer - design rules and applications
Autorzy:
Gnyba, M.
Smulko, J.
Kwiatkowski, A.
Wierzba, P.
Powiązania:
https://bibliotekanauki.pl/articles/200133.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Raman spectroscopy
chemical detection
lasers
detection algorithms
Opis:
Raman spectroscopy has become more popular due to its new prospective field applications in forensic sciences, war against terrorism, environment protection and other field chemical analysis. Raman spectrometers can be miniaturised to portable devices and their price is decreasing due to development of optoelectronics components. Unfortunately, this technology has still numerous limitations that influence their design and limit the scope of possible applications. The conception and design of the portable Raman spectrometer is described, including discussion of performance and limitations of representative components of such device available on the market. An enhanced portable Raman spectrometer using two lasers, one emitting at 355 nm and the other at 785 nm, and employing advanced signal acquisition and data processing methods is presenented. Advantages of such system are outlined and example measurement results acquired using equivalent hardware are presented. Data processing flow for identification of chemicals is also described.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2011, 59, 3; 325-329
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Applications of Raman scattering in biomedicine, telecommunication and thermometry
Autorzy:
Abramczyk, H.
Kopeć, M.
Powiązania:
https://bibliotekanauki.pl/articles/114555.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
linear and nonlinear Raman spectroscopy
Raman Imaging
cancer
biodiagnostics
Opis:
The paper presents a brief review of methodologies and applications based on the spontaneous and stimulated Raman scattering in telecommunication, thermography and biomedicine. We present the results on cancer biodiagnostics by Raman imaging based on the spontaneous Raman scattering. We showed that combined Raman imaging based on spontaneous Raman scattering and AFM are capable of monitoring biomechanics of tumor vascularity, which is markedly heterogeneous with densely vascularized areas supplying oxygen and nutrients to rapidly growing parts of the tumor. The experimental evidence provides greater understanding of the biomechanics of cancer cell and tissue deformability and its interactions with the extracellular matrix environments offering enormous potential for significant new developments in cancer diagnostics, therapy and drug treatment.
Źródło:
Measurement Automation Monitoring; 2017, 63, 2; 38-40
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Raman Spectroscopy in the investigations of indexable knives for woodbased materials machining
Autorzy:
Barlak, Marek
Wilkowski, Jacek
Wilczopolska, Magdalena
Werner, Zbigniew
Staszkiewicz, Bogdan
Zagórski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2146687.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
Raman Spectroscopy
WC-Co indexable knives
tools modification
Opis:
Raman spectroscopy for examination of WC-Co tools in wood-base machining. An attempt is undertaken to apply Raman Spectroscopy for examination of WC-Co tools for wood-base machining. The virgin tools were compared with those implanted with nitrogen, modified by electron beam and plasma beam pulses. The preliminary results suggest a possibility of applying this method for fast, non-destructive analysis of phase composition and phase changes in the microstructure of the investigated tools.
Spektroskopia Ramana w badaniach narzędzi WC-Co wykorzystywanych w obróbce materiałów drzewnych. W pracy podjęto próbę zastosowania Spektroskopii Ramana w badaniach wymiennych noży WC-Co, stosowanych do obróbki materiałów drewnopochodnych. Przeanalizowano narzędzia niezmodyfikowane, implantowane jonami azotu, poddane działaniu impulsów elektronowych i plazmowych. Wstępne wyniki sugerują możliwość zastosowania tej metody do szybkiej i nieniszczącej analizy składu fazowego i zmian fazowych w mikrostrukturze badanych narzędzi.
Źródło:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2021, 114; 33--43
1898-5912
Pojawia się w:
Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Photoluminescence and Raman spectroscopies as an optical approach of stress determining in MOVPE grown quantum cascade laser structures
Autorzy:
Łozińska, Adriana
Badura, Mikołaj
Jadczak, Joanna
Bielak, Katarzyna
Ściana, Beata
Powiązania:
https://bibliotekanauki.pl/articles/174205.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
QCL core
quantum cascade laser
photoluminescence
Raman spectroscopy
Opis:
In the presented work, an optical approach of stress determining in metalorganic vapor phase epitaxy (MOVPE) grown quantum cascade laser (QCL) structures was reported. In the case of such sophisticated structures containing hundreds of thin layers, it is important to minimize the stress generated in the QCL core. Techniques enabling determination of stress in such thin layers as those described in the article are photoluminescence and Raman spectroscopies. Based on Raman shift or changes in photoluminescence signal, it is possible to analyze stress occurring in the structure.
Źródło:
Optica Applicata; 2020, 50, 2; 289-299
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shock heterogeneity and shock history of the recently found ordinary Csátalja chondrite in Hungary
Autorzy:
Kereszturi, A.
Fintor, K
Gyollai, I.
Kereszty, Z.
Szabo, M.
Szalai, Z.
Walter, H.
Powiązania:
https://bibliotekanauki.pl/articles/2059757.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
meteorite
shock impact alteration
ordinary chondrite
infrared spectroscopy
Raman spectroscopy
Opis:
Shock impact-produced mineral alterations in two thin sections of the recently found Csátalja H4 ordinary chondrite meteorite are compared. Peak positions of Raman and infrared spectra of mineral clasts show peaks shifted in wavenumber relative to unshocked reference minerals, and both peak shifts and FWHM values seem to correlate to each other. In the less shocked thin section (Csátalja-1) a more monomineralic and homogeneous composition indicate shock pressures of <15 GPa, while the more shocked Csátalja-2 indicates shock pressure in the 15–17 GPa range. The highest identified infrared peak position shifts range between –48 and +28 cm–1 with peak broadening between 60–84 cm–1 in the case of the feldspars, which, together with sulphide globules, were produced by the shock itself. Feldspar spectra could be detected only by FTIR spectroscopy, but in most cases (above the S3 shock level) the mixed type of the pyroxene-feldspar spectra (both peaks in the same spectra) is in agreement with the shock-produced secondary feldspars. These grains are located around crystalline borders, and probably formed by selective melting, due to shock annealing. In reconstruction of the shock history, an early fragmentation by a lower shock effect and a later increased shock level-related vein and melt pocket formation occurred, with subsequent shock annealing; temporal reconstruction of the shock event is possible only in part. The joint usage of Raman and infrared spectroscopy provided useful insights into the shock-produced changes and their spatial inhomogeneity, while shocked feldspar could be better detected by infrared than by the Raman method.
Źródło:
Geological Quarterly; 2018, 62, 2; 433--446
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gemstones from the ducal part of the fortified settlement of Poznań (10th/11th century) in the light of gemological studies and micro-Raman spectroscopy
Autorzy:
Sachanbiński, Michał
Kóčka-Krenz, Hanna
Skoczylas, Janusz
Girulski, Robert
Powiązania:
https://bibliotekanauki.pl/articles/1038457.pdf
Data publikacji:
2014-01-01
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
rock crystal
garnet
early medieval artifacts
micro-Raman spectroscopy
Opis:
During archaeological excavations in Poznań there were discovered a ducal palace, a chapel dated to the 10th century, and goldsmith’s workshop adjacent to them. In the layer of ashes at the bottom of the manufacture, there were fragments of gold found together with numerous glass beads and gems. Fourteen gems, made of rock crystal, agate, carnelian, milky chalcedony, garnet, were chosen for gemstone analysis and micro-Raman spectroscopy. The study material is dominated by beads (12 samples, of which six is faceted and six globular), while two pyrope samples have the cabochon cut. It should be emphasized that the rock crystal gems in the collection are usually heptagonal. Majority of the Poznań collection is of high quality, which is a sign of an advanced grinding and faceting technology. Pyrope from the Poznań collection contains inclusions of apatite, rutile, quartz, and magnetite, identified with micro-Raman spectroscopy. A similar combination of inclusions was recognized in pyrope from deposits in Vestřev near Turnov (Bohemia), and hence it indicates that the artifacts from Poznań were made of the pyrope from those deposits. Considering inclusions in rock crystal artifacts from the Poznań collection it was assumed that the mineral was also of the Bohemian origin.
Źródło:
Slavia Antiqua: rocznik poświęcony starożytnościom słowiańskim; 2014, 55; 145-169
0080-9993
Pojawia się w:
Slavia Antiqua: rocznik poświęcony starożytnościom słowiańskim
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Raman spectroscopy analysis in unconventional natural gas reservoirs – density and pressure dependence on Raman signal intensity
Autorzy:
Kuczyński, S.
Włodek, T.
Smulski, R.
Dąbrowski, K.
Krakowiak, M.
Barbacki, J.
Pawłowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/298970.pdf
Data publikacji:
2017
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Raman spectroscopy
unconventional natural gas
fiber optic
PVT
hydrocarbons
Opis:
This paper contains information about Raman spectroscopy, describing its possible application in the oil and gas industry. This method allows the performance of a series of repetitive measurements to determine the composition of samples and its changes with high accuracy. In the article, the data presented in the literature connected with Raman spectroscopy and the oil and gas industry is analyzed. This paper considered measurements of a natural gas composition in simulated in-situ conditions performed using Raman spectroscopy. The current research project is trying to develop a mobile apparatus which would use Raman spectroscopy for defining reservoir fluid compounds in high pressure and high temperature conditions. The preliminary measurements were carried out in the simulated in-situ in variant pressure conditions.
Źródło:
AGH Drilling, Oil, Gas; 2017, 34, 3; 761-774
2299-4157
2300-7052
Pojawia się w:
AGH Drilling, Oil, Gas
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The investigation of experimental combustion engine elements conducted with use of atomic physics methods
Autorzy:
Kałużny, J.
Iskra, A.
Babiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/243636.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine researches
carbon nanotubes
electron microscopy
Raman spectroscopy
Opis:
The authors put forward in earlier publications the concept of using carbon nanotubes (CNT) in order to improve the functional characteristics of selected structural components of internal combustion engines. The main goal of applying carbon nanotubes is to take advantage of its unique properties, which cannot be found among traditional construction materials, to reduce emissions and fuel consumption. To achieve this goal it is essential to come to know about elements and materials behaviour in specific application, for example piston or catalytic converter. In this article, selected methods in the field of atomic physics applied to the study of experimental engine components produced using nanotechnology are presented. For example, the electron microscopy in conjunction with registration of the characteristic X-ray and Raman spectroscopy were used. These test methods are improving the knowledge of the properties and design of pistons and catalytic converters with surface coated with multi-walled carbon nanotubes. The results of elements surface analysis, which were diverted from the engines after a series of test stand investigations, offer insight into the processes that take place in layers of carbon nanotubes in actual engine operating conditions. The knowledge gained with application of atomic physics methods allows achieving further improvement of carbon nanotubes layers and its functional characteristics.
Źródło:
Journal of KONES; 2015, 22, 4; 147-154
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An effect of igneous intrusion on the structure, texture and microtexture of coal from the Sośnica coal mine, Upper Silesian Coal Basin, Poland
Autorzy:
Smędowski, Ł.
Duber, S.
Matuszewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059658.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
coal
structure
transmission electron microscopy
Raman spectroscopy
igneous intrusion
Opis:
Two coal samples from the Sośnica coal mine, Poland, were analysed in this study. One sample was the natural char collected at the contact of magmatic intrusion, and another sample was the raw coal that was pyrolised in a laboratory furnace. Temperature of pyrolysis was similar to that calculated for the intrusion. The obtained char was analysed to compare its features with those characterizing a natural char sample. Optical microscopy, transmission electron microscopy and Raman spectroscopy studies show that the char from unaltered coal is characterized by the least developed structure, texture and microtexture compared to the natural char. Hence, it can be concluded that geological pressure generated by both the intrusion and the overburden, strongly affects the process of molecular ordering that took place during the heating of coal. The textural, structural or microtextural parameters of coal cannot be used as a geo-thermometer, because they are strongly dependent not only on the temperature but also on other factors.
Źródło:
Geological Quarterly; 2015, 59, 3; 507--516
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of RF ICP PECVD process parameters of diamond-like carbon films on DC bias and optical emission spectra
Autorzy:
Oleszkiewicz, W
Markowski, J
Srnanek, R
Kijaszek, W
Gryglewicz, J
Kovac, J
Tlaczala, M
Powiązania:
https://bibliotekanauki.pl/articles/173686.pdf
Data publikacji:
2013
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
PECVD
diamond-like carbon layers
OES
Raman spectroscopy
AFM
Opis:
The work presents the results of a research carried out with PlasmaLab Plus 100 system, manufactured by Oxford Instruments Company. The system was configured for deposition of diamond-like carbon films by ICP PECVD method. The change of an initial value of DC bias was investigated as a function of set values of the generator power (RF generator and ICP generator) in the constant power of the RF generator operation mode. The research shows that the value of DC bias nearly linearly depends on the RF generator power value and is affected only in a small degree by the power of ICP discharge. The capability of an installed OES spectrometer has been used to ensure the same starting conditions for the deposition processes of DLC films. The analysis of OES spectra of RF plasma discharge used in the deposition processes shows that the increase in ICP discharge power value results in the increased efficiency of the ionization process of a gaseous precursor (CH4). The quality of deposited DLC layers was examined by Raman spectroscopy. Basing on the acquired Raman spectra, the theoretical content of sp3 bonds in the structure of the film was estimated. The content is ranging from 30% to 65% and depends on ICP PECVD deposition process parameters.
Źródło:
Optica Applicata; 2013, 43, 1; 109-115
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 50

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