Temat: spectroscopy - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Modulation index optimization for wavelength modulation spectroscopy
Autorzy:: Mohammadi, M. J.
Khorsandi, A.
Ghavami, S. S.
Tematy:: wavelength modulation spectroscopy
NIR laser spectroscopy
molecular spectroscopy; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/949416.pdf Link otwiera się w nowym oknie
Opis:: In this work, the second-harmonic component of wavelength modulation spectroscopy is simulated for R(22) CO2 absorption line to investigate the effect of gas temperature and pressure on the modulation index. We found that the optimum value of modulation index, that is 2.2, is not affected by temperature but gas pressure will change the optimized modulation index. Specifically, when the gas pressure decreased to lower pressures of less than 100 mbar, the modulation index is also decreased and tended exponentially to about two. Accordingly, the optimum value of modulation index is recalculated for a range of CO2 gas pressures to establish a nearly zero pressure deviation in the spectroscopy of very low pressure samples.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The Mössbauer spectrometer MsAa-4
Autorzy:: Górnicki, R.
Ruebenbauer, K.
Tematy:: gamma-ray spectroscopy
Mössbauer spectroscopy
spectrometers; Pokaż więcej
Wydawca:: Instytut Chemii i Techniki Jądrowej
Powiązania:: https://bibliotekanauki.pl/articles/147400.pdf Link otwiera się w nowym oknie
Opis:: A description of the Mossbauer spectrometer MsAa-4 is given. The spectrometer has a modular design and it could be used as the gamma-ray spectrometer as well. It has almost entirely digital design to assure stability and repeatability. It is powered via the rechargeable battery to make it immune to the power failures. All settings are performed remotely over the Ethernet link used also to transfer data and spectrometer functions. External CAN bus could be used to attach auxiliary equipment. The status of the external equipment could be used to control spectrometer functions. Internal digital oscilloscope monitors vital functions of the spectrometer over the Ethernet link. Driving software operates under Microsoft Windows registered trademark systems and it is fully compatible with the Mosgraf-2009 data processing suite.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Acoustical Spectroscopy of Carbohydrate Aqueous Solutions: Saccharides; Alkyl Glycosides; Cyclodextrins. Part I. Conformer Variations
Autorzy:: Kaatze, U.
Tematy:: acoustical spectroscopy
non-equilibrium spectroscopy
carbohydrate solutions; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/177869.pdf Link otwiera się w nowym oknie
Opis:: Acoustical attenuation spectra in the frequency range 12 kHz – 2 GHz and nonequilibrium time domain measurements are briefly reviewed for aqueous solutions of various mono- and disaccharides as well as alkyl glycosides. Several relaxation regimes emerge with relaxation times between 10^-11 s and 10^3 s. In this paper relaxation terms reflecting conformational changes are discussed, particularly mutarotation (10^3 s), chair-chair ring inversion (1 ąs), two modes of pseudorotation (100 ns, 10 ns), disaccharide ring isomerisation (10 ns), and exocyclic side group rotation (1 ns).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: An analytical study of pigments in Qing Dynasty murals of Longwang Temple, Xiazhuang, Xinrong district, Datong
Autorzy:: Haijiao, Zhang
Min, Zhang
Tematy:: frescoes
pigments
SEM-energy spectroscopy
Raman spectroscopy; Pokaż więcej
Wydawca:: Łódzkie Towarzystwo Naukowe
Powiązania:: https://bibliotekanauki.pl/articles/55996176.pdf Link otwiera się w nowym oknie
Opis:: The frescoes of Xia Zhuang Longwang Temple in Xinrong District, Datong, were Ming Dynasty frescoes of the Qing Dynasty. To understand their pigment composition, this work used a combination of scanning electron microscopy-energy spectrometry and laser micro Raman spectroscopy to analyze the pigment samples. The results show that the murals of Xia Zhuang Longwang Temple are all inorganic pigments. The white pigment is hard gypsum, the red pigment is mainly cinnabar, the green pigment is alkaline copper chloride, the blue pigment is cobalt blue, the black and gray pigments are mainly carbon black, the pink pigment coloring component is iron red, and the yellow pigment contains coloring components cinnabar and lead. The results of the study are important for understanding the production process of folk murals and the use of pigments in the Qing Dynasty.
Freski dynastii Ming w świątyni Xia Zhuang Longwang w dystrykcie Xinrong w Datong pochodzą z okresu z dynastii Qing. Aby poznać skład ich pigmentów wykorzystano kombinację skaningowej mikroskopii elektronowej, spektrometrii energetycznej i laserowej mikrospektroskopii Ramana do analizy próbek pigmentu. Wyniki pokazują, że wszystkie malowidła ścienne świątyni Xia Zhuang Longwang wykonane zostały za pomocą pigmentów nieorganicznych. Biały pigment to twardy gips, czerwony to głównie cynober, zielony to alkaliczny chlorek miedzi, niebieski to kobaltowy błękit, czarne i szare pigmenty to głównie sadza, komponentem różowego pigmentu jest żelazo, zaś na pigment żółty składa się cynober i ołów. Wyniki badań są ważne dla zrozumienia procesu tworzenia fresków w czasach dynastii Qing.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Correlation of monomer structures of tripalmitin with the spectroscopic fingerprint of polymorphs : infrared, Raman, and DFT study
Autorzy:: Kaczor, Agnieszka
Barańska, Małgorzata
Wróbel, Tomasz P.
Pilarczyk, Marta
Opis:: In the light of application of vibrational spectroscopy in medical diagnosis, it is necessary to have a tool to distinguish between different lipids that may be present in biochemical samples such as cells and tissues. One of the most common lipids in the human body are triglycerides. Therefore, the aim of this work was to investigate the model triglyceride, namely tripalmitin in order to find the differences between the vibrational signatures of its polymorphs and interpret them with the help of quantum-chemical computations. Although monomeric models are not sufficient to reproduce polymorphs structure, analysis of these models is very helpful in understanding of relations between the structure and changes in vibrational spectra.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 6.

Tytuł:: Nowa metoda impulsowej fotolizy laserowej ; rozdzielcze w czasie badania fotodysocjacji dwucyjanoacetylenu
Autorzy:: Kołos, Robert
Współwytwórcy:: Grabowski, Zbigniew Ryszard (1927– )
Wydawca:: Institute of Physical Chemistry PAS
Instytut Chemii Fizycznej PAN
Opis:: Bibliogr. p. 101-106
106 pp. : ill. ; 30 cm.
Bibliogr. s. 101-106
Praca doktorska. Instytut Chemii Fizycznej PAN,1991
Dissertations. Institute of Physical Chemistry PAS,1991
106 s. : wykr. ; 30 cm.
Dostawca treści:: RCIN - Repozytorium Cyfrowe Instytutów Naukowych

Książka

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Skocz do pozycji: 7.

Tytuł:: Solution conformational study of nociceptin and its 1-13 and 1-11 fragments using circular dichroism and two-dimensional NMR in conjunction with theoretical conformational analysis
Autorzy:: Brzozowski, Krzysztof
Łęgowska, Anna
Klaudel, Lidia
Silberring, Jerzy
Wójcik, Jacek
Rolka, Krzysztof
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 8.

Tytuł:: Spectroscopic studies of anthracyclines : structural characterization and in vitro tracking
Autorzy:: Chłopicki, Stefan
Farhane, Zeineb
Majzner, Katarzyna
Byrne, Hugh J.
Matuszyk, Ewelina
Lukawska, Malgorzata
Barańska, Małgorzata
Oszczapowicz, Irena
Opis:: A broad spectroscopic characterization, using ultraviolet–visible (UV–vis) and Fourier transform infrared absorption as well as Raman scattering, of two commonly used anthracyclines antibiotics (DOX) daunorubicin (DNR), their epimers (EDOX, EDNR) and ten selected analogs is presented. The paper serves as a comprehensive spectral library of UV–vis, IR and Raman spectra of anthracyclines in the solid state and in solution. The particular advantage of Raman spectroscopy for the measurement and analysis of individual antibiotics is demonstrated. Raman spectroscopy can be used to monitor the in vitro uptake and distribution of the drug in cells, using both 488 nm and 785 nm as source wavelengths, with submicrometer spatial resolution, although the cellular accumulation of the drug is different in each case. The high information content of Raman spectra allows studies of the drug-cell interactions, and so the method seems very suitable for monitoring drug uptake and mechanisms of interaction with cellular compartments at the subcellular level.
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 9.

Tytuł:: Functionalization of heteropolyanions-osmium and rhenium nitrido derivatives of Keggin‐ and Dawson‐type polyoxotungstates : synthesis, characterization and multinuclear $(^{183}W, ^{15}N)$ NMR, EPR, IR, and UV/Vis fingerprints
Autorzy:: Hamaker, Christopher G.
Thouvenot, René
Che, Michel
Proust, Anna
Maatta, Eric A.
Sojka, Zbigniew
Dablemont, Céline
Dostawca treści:: Repozytorium Uniwersytetu Jagiellońskiego

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Skocz do pozycji: 10.

Tytuł:: Comparision of Physicochemical Parameters of Rape Seeds Applying the Infrared Spectroscopy Method
Autorzy:: Koszel, Milan
Kachel-Jakubowska, Magdalena
Kraszkiewicz, Artur
Przywara, Artur
Wydawca:: Department of Machinery Exploitation and Management of Production Processes, University of Life Sciences in Lublin, Poland
Cytata wydawnicza:: Przywara A., Kachel-Jakubowska M., Kraszkiewicz A., Koszel M. 2017. Comparision of Physicochemical Parameters of Rape Seeds Applying the Infrared Spectroscopy Method. [in:] Lorencowicz E. (ed.), Uziak J. (ed.), Huyghebaert B. (ed.). Farm Machinery and Processes Management in Sustainable Agriculture, 9th International Scientific Symposium. ULS Lublin, p.324-329
Opis:: Technical progression in sustainable agriculture requires the need for search more and newer analytical methods in order to reduce time of analysis and to minimize costs routine of tests for the highest accuracy of the result. Infrared (IR) and near infrared (NIR) spectroscopy provides such possibility. The paper presents a method of measuring the basic quality parameters (moisture, content of protein, fat, damage and contamination of raw material) of winter rapeseed for cultivars: Abacus, Bellevue, and Adriana+Catana - concoction. Statistically significant differences resulting from various measurement systems between results obtained by means of sieve methods and infrared (IR), were observed. A three-dimensional way of measuring the seed shape used in three dimensional particle size analyzer (AWK 3D) suggests that it is more accurate than the measurement applying two-dimensional method used in the shaker with a set of sieves.
Dostawca treści:: Repozytorium Centrum Otwartej Nauki

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