Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "spectroscopy" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 72
Tytuł:
Fibrous structures based of natural polymers for tissue engineering applications
Autorzy:
Stodolak-Zych, E.
Ścisłowska-Czarnecka, A.
Kolesinska, B.
Cieślak, M.
Puchowicz, D.
Kaminska, I.
Bogun, M.
Powiązania:
https://bibliotekanauki.pl/articles/285455.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polymers
tissue engineering
spectroscopy
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 63
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Vibrational spectroscopy investigation of montmorillonite-chitosane nanocomposite materials
Autorzy:
Paluszkiewicz, C.
Stodolak, E.
Powiązania:
https://bibliotekanauki.pl/articles/283827.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
spectroscopy
chitosan
nanocomposite materials
Opis:
Biomaterials basing on natural polysaccharides, i.e. hiauronic acid, alginate, chitosane are an alternative for already applied bioresorbable synthetic materials basing on synthetic polyhydroxy acids. Their main advantages are good accessibility, low cost, easy forming and high biocompatibility. Additionally , they are a perfect matrix for bioactive nanoparticles i.e. hydroxy apatite (HAp), tricalcium phosphate (TCP) and silica (SiO2). The work presents results of research on nanocomposite consisting of chitosane matrix (CS) modified with a nanofiller, which was natural montmorillonite (MMT). Nanocomposite foils were produced by the casting method. In order to induce better biocompatibility, the surface of the CS/MMT composite was neutralized (bath in NaOH solution). The nanocomposite foils were subjected to a bioactivity test by incubation in SBF at 37oC for 7 days. It was observed that the CS/ MMT material surface showed a local supersaturation, which was a result of apatite nucleation. The CS/ MMT nanocomposites were investigated using FT-IR ( Fourier Transform Infrared Spectroscopy) and Fourier Raman Spectroscopy. FTIR measurements o f the samples were carried out on the transmission and reflection modes. The FTIR microscopy spectra were collected using BioRad Excalibur with ATR attachment as well as microscope UMA500 equipped with MCT detector. Spectra were measure at 4 cm -1 resolution in the region from 4 000 cm -1 to 600 cm -1 . FT-Raman spectra were obtained using a FTS 6000 Bio-Rad spectrometer with Ge detector. The samples were excited with a Nd-YAG laser (1064nm). Additional all materials in all steps experiments were observed under Scanning Electron Microscopy (Nova Nano SEM). Vibrational spectroscopy methods (FT Raman and FTIR) can be used for investigation of nanocomposite foils basing on biopolymers. High sensitivity the applied spectroscopy techniques show that in the result of the neutralization of CS/ MMT foil (via incubation in NaOH solution the biopolymer chain breaks. This phenomena is visible by intensity ratio between COC/COH bands. Increase of reactivity of chitosane chain lead to entrapment of PO4+3-, which is the origin of the apatite forms nucleation process. Chemical treatment of the nanocomposite foils, i.e. NaOH washes in fluences their chemical structure and microstructure. Neutralisation of the foils is the first processing stage which precedes the potential use o fCS/ MMT foils in biomedical applications. The materials show a tendency to apatite crystallisation which may support regeneration of damaged bone tissue. The applied spectroscopic methods allowed to observe changes in the whole volume of the sample. Individual ATR measurements taken at various spectral ranges and penetration depths allow to observe subtle changes in the polymer matrix caused by chemical treatment (NaOH and SBF incubation). Results of the investigations indicate that in the CS/ MMT systems new chemical bonds and related to them vibrations appear. Quantity and quality of the interact ions is related to characteristics of the nanoparticle and the presence of forming apatite structures.
Źródło:
Engineering of Biomaterials; 2011, 14, no. 109-111 spec. iss.; 44
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Technical setup and physical properties Technical setup and physical properties of a gas-liner pinch
Autorzy:
Büscher, S.
Wrubel, T.
Kunze, H.
Powiązania:
https://bibliotekanauki.pl/articles/146803.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
lineshapes
spectroscopy
Z-pinch
Opis:
he present technical status and physical properties of the gas-liner pinch device in Bochum are presented and discussed. This comprises spectroscopic as well as diagnostic achievements. A short review on the measurements performed at this light source will also be given.
Źródło:
Nukleonika; 2000, 45, 3; 167-172
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Clinical application of advanced neuroimaging techniques – Magnetic Resonance Spectroscopy
Autorzy:
Guz, Wiesław
Bober, Zuzanna
Ożóg, Łukasz
Truszkiewicz, Adrian
Przypek, Aneta
Aebisher, David
Bartusik-Aebisher, Dorota
Urbanik, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/454826.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
spectroscopy
MR
SVS
CSI
Opis:
Continuous scientific research and the increasing saturation of the medical market in Poland implements the possibilities of using advanced MR techniques including MRS in everyday practice. This method, which has so far been used primarily for research purposes, can bring measurable benefits to patients not only in terms of clarifying diagnosis and narrowing differential diagnosis, but also monitoring the course of various diseases and their treatment. Here we present the basic principles of performing and interpreting spectroscopic spectra and possible clinical applications and development prospects of MRS. The literature reviewed both Polish and foreign articles both historically and in the past 10 years. The paper presents methodological issues related to the proper performance of magnetic resonance spectroscopy (MRS) and spectral composition and the role of major metabolites, as well as current clinical applications and directions of MRS development.
Źródło:
European Journal of Clinical and Experimental Medicine; 2017, 2; 133-140
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the influence of a carbon solid on the properties of a helium plasma in a theta pinch discharge
Autorzy:
Freese, W.
Kunze, H.
Powiązania:
https://bibliotekanauki.pl/articles/146807.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
shock wave
spectroscopy
theta pinch
Opis:
A helium plasma produced in a 82 kJ theta pinch discharge has been seeded with carbon ions by a carbon solid rod positioned on the axis. The first shock front of the discharge ablates carbon atoms from the solid surface which are ionized and interact with the plasma. Some shock front properties (namely thickness, compression velocity and its shape) were analyzed with an ICCD-camera system taking 2-dimensional photos of the plasma continuum emitted along the axis with a time duration of 100 ns. While the influence on the shape was not found, the temporal behaviour was drastically changed when the rod was added. The shock front occurs earlier and compresses faster. An explanation remains to be given. Furthermore, the influence of the carbon impurities on the plasma parameters has been investigated by measuring the electron temperature and density by means of plasma spectroscopy comparing these results with those obtained from discharges in helium without rod. We found a decrease in the electron density about 500 ns after the shocked plasma has started to interact with the rod surface. Simultaneously increasing continuum emission and decreasing intensity of the HeII Pa line indicates a regime of recombination. No influence was found on the electron temperature.
Źródło:
Nukleonika; 2000, 45, 3; 173-177
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Humic acids from an Arctic fjord, Krossfjorden, Spitsbergen
Autorzy:
Shaji, Aswathy
Gopinath, Anu
Krishnan, Anoop
Prabhakaran, Sabu
Powiązania:
https://bibliotekanauki.pl/articles/16538467.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
Arctic
Svalbard
sediment
organic matter
spectroscopy
Opis:
Humic substances are ubiquitous materials found in terrestrial and aquatic ecosystems. Humic acids, a diagenetic product can interact with various components present in aquatic sediments. The present research is on the evaluation of sedimentary humic acids from the Krossfjorden glacial fjord situated within the Svalbard archipelago. The results of this study are needed to understand the structural characteristics of humic acids isolated from the fjord. Surface sediment samples were collected from four stations throughout the fjord during a summer period in 2018. Various spectroscopic techniques such as UV-visible, Fourier-transform infrared spectroscopy (FTIR), and Nuclear magnetic resonance spectroscopy (NMR) were applied for studying the humic acids. The elemental composition as well as the presence of tannin and lignin were also analyzed. The results of this study revealed the variation in the structure of humic acids from aliphatic to aromatic from the outer to the inner region of the fjord. This change in humic acids was well supported by the FTIR and NMR results with differences in the spectrums.
Źródło:
Polish Polar Research; 2022, 43, 4; 311-324
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Engine fuel characterisation through ultraviolet absorption spectra
Autorzy:
Baszanowska, E.
Otremba, Z.
Powiązania:
https://bibliotekanauki.pl/articles/245537.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
fuel
spectroscopy
absorptivity
diesel engine system
Opis:
In the article, light absorption properties of the fuel oil are considered with a view to create basis for establish optical indicator of the type and quality of this kind of crude oil derivative, in this case the Diesel fuel. The organic solvent – n-hexane – was chosen as a solvent to prepare samples of dilutions of Diesel fuel in several oil concentration. Spectrophotometer Aqualog Horiba were applied to record the absorbance spectra in the ultraviolet and visual range of the light (from 240 to 600 nm) for each previously prepared samples. Obtained results allow concluding that the changes of absorbance occur primarily in the wavelength range from 240 nm to 355 nm. Moreover, the absorbance spectra are characterized by the characteristic sharp peak located at 270 nm for excitation wavelength. Spectra of absorbance were converted to spectra of absorption coefficient based on Lambert-Beer law. Due to the independence the absorption coefficient from the fuel concentration, this parameter could be used as a potential indicator to access composition and quality Diesel fuel used in the diesel engine system. Therefore, preliminary tests allow concluding that absorption coefficient for selected wavelength located at 270 nm could be a sensitive indicator for quick access to fuel quality.
Źródło:
Journal of KONES; 2017, 24, 3; 15-19
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring Heavy Metals Content in Wastewater using Laser Induced Breakdown Spectroscopy
Autorzy:
Ali, S.
Jamil, H.
Imran, M.
Powiązania:
https://bibliotekanauki.pl/articles/412386.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
heavy metals
leather factories
wastewater
spectroscopy
Opis:
In the present study, laser-induced breakdown spectroscopy (LIBS) has been applied for the determination of chromium and cadmium contents in wastewater of different canneries surrounding by leather factories. The plasma was generated with a Q-switched Nd:YAG laser having a fundamental wavelength of 1064 nm and delivers maximum pulse energy of 180 mJ. Experimental conditions were optimized to improve the sensitivity and to get a reasonable signal from the generated plasma. The results show that the concentration of chromium and cadmium are varying in different samples depending on the incoming flow of the wastewater from factories. The results from LIBS and standard analytical technique called flame atomic absorption spectroscopy (FAAS) were compared and found in good agreement within the experimental uncertainties.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 2; 69-75
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stability of colloidal systems - a review of the stability measurements methods
Autorzy:
Matusiak, Jakub
Grządka, Elżbieta
Powiązania:
https://bibliotekanauki.pl/articles/763954.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
stability
colloids
zeta potential
turbidimetry
spectroscopy
Opis:
The stability of colloidal systems is very important in numerous already existing and new formulations. In most cases if such systems are not characterized by an appropriate stability they can not find any useful applications. The opposite process to the stabilization is the flocculation. Generally, it is undesirable. However, in a few cases the flocculation is very useful, for example in  the wastewater treatment. That is why the methods used to determine stabilizing-flocculating properties of the colloidal systems are of significant importance.The paper describes types of stability and flocculation as well as the factors influencing those processes, e.g. the addition of polymers or surfactants. The methods presented in this paper are UV-VIS spectrophotometry,  turbidimetry, zeta potential and density measurements.
Źródło:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia; 2017, 72, 1
2083-358X
Pojawia się w:
Annales Universitatis Mariae Curie-Skłodowska, sectio AA – Chemia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of aloe vera release from alginate based hydrogels
Autorzy:
Miastkowska, Małgorzata
Bialik-Wąs, Katarzyna
Powiązania:
https://bibliotekanauki.pl/articles/1844944.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
biopolymers
spectroscopy
hydrożele
biopolimery
spektroskopia
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 34
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Understanding of fluorouracil nanoparticles sonochemical formation for its controlled delivery from polymeric surfaces
Autorzy:
Chytrosz, Paulina
Gołda-Cępa, Monika
Cwilklik, Łukasz
Kulig, Waldemar
Kotarba, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1844964.pdf
Data publikacji:
2020
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
polymers
biomaterials
spectroscopy
polimery
biomateriały
spektroskopia
Źródło:
Engineering of Biomaterials; 2020, 23, 158 spec. iss.; 36
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bacterial pattern identification in near-ibfrared spectrum
Identyfikacja bakterii w widmie bliskiej podczerwieni
Autorzy:
Krepelka, P.
Pérez-Rodríguez, F.
Bartusek, K.
Powiązania:
https://bibliotekanauki.pl/articles/408153.pdf
Data publikacji:
2014
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
infrared imaging
spectroscopy
cells
absorption
near infrared spectroscopy
obrazowanie w podczerwieni
spektroskopia
komórki
absorpcja
spektroskopia bliskiej podczerwieni
Opis:
Microorganism identification, primary bacterial identification and pathogen detection, is important in a lot of microbial scientific areas (diagnosing of infection diseases, food protection). In this paper, the identification of the strains was performed by Near Infrared spectroscopy (wavelength from 900 nm to 2500 nm). Different techniques for classification (CVA, ANN…) were examined. It was reached to 100% accuracy on limited count of samples. Because a removing of water from sample represents a time-consuming step in sample preparation process, influence of water to spectrum was examined. Near Infrared (NIR) spectroscopy seems to be a suitable method for rapid bacteria identification. It can be used in a wide variety of food protection, medicine microbiology, bio-terrorism threats and environmental studies.
Identyfikacja mikroorganizmów, głównie identyfikacja bakterii i wykrywanie patogenów jest niezwykle istotnym zagadnieniem w wielu dziedzinach mikrobiologii takich jak: diagnozowanie infekcji czy ochrona żywności. W tym artykule dokonano identyfikacji filtracji z pomocą bliskiej podczerwieni (długość fali od 900 nm do 2500 nm). Sprawdzono różne techniki klasyfikacji (CVA, ANN …). Osiągnięto 100% dokładność na ograniczonej liczbie próbek. Spektroskopia bliskiej podczerwieni (NIR) wydaje się być właściwą metodą do szybkiej identyfikacji bakterii. Metoda ta może być użyta do zabezpieczania żywności, w mikrobiologii, w walce przeciw bio-terroryzmowi, a także w badaniach środowiska.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2014, 3; 58-60
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of soil characteristics using three bands agri-cultural digital camera
Autorzy:
Glinko, Agnieszka
Kaźmierowski, Cezary
Piekarczyk, Jan
Królewicz, Sławomir
Powiązania:
https://bibliotekanauki.pl/articles/15804816.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
remote sensing
soil
spectroscopy
cubist
R Studio
Opis:
Remote sensing techniques based on soil spectral characteristics are the key to future land management; however, they still require field measurement and an agrochemical laboratory for the calibration of the soil property model. Visible and near-infrared diffuse reflectance spectroscopy has proven to be a rapid and effective method. This study aimed to assess the suitability of multispectral data acquired with the agricultural digital camera in determining soil properties. This 3.2-Mpx camera captures images in three spectral bands – green, red and near-infrared. First, the reference data were collected, which consist of 151 samples that were later examined in the laboratory to specify the granulometric composition and to quantify some chemical elements. Second, additional soil properties such as cation exchange capacity, organic carbon and soil pH were measured. Finally, the agricultural digital camera photograph was taken for every soil sample. Reflectance values in three available spectra bands were used to calculate the spectra indices. The relationships between the collected data were calculated using the independent validation regression model such as Cubist and cross-validation model like partial least square in R Studio. Additionally, different types of data normalisation multiplicative scatter correction, standard normal variate, min–max normalisation, conversion into absorbance] were used. The results proved that the agricultural digital camera is suitable for soil property assessment of sand and silt, pH, K, Cu, Pb, Mn, F, cation exchange capacity and organic carbon content. Coefficient of determina-tion varied from 0.563 (for K) to 0.986 (for soil organic carbon). Higher values were obtained with the Cubist regression model than with partial least squares.
Źródło:
Quaestiones Geographicae; 2022, 41, 3; 127-140
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zagadkowe znalezisko z elipsy spadku meteorytu Łowicz
A puzzling finding from the Łowicz meteorite strewnfield
Autorzy:
Kozłowski, Szymon
Powiązania:
https://bibliotekanauki.pl/articles/2195008.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
meteorites
mesosiderite
metal
meteor-wrong
spectroscopy
identification
Opis:
The paper presents the circumstances of finding and analyses of an unusual 35 g piece of iron-like meteor-wrong collected in the strewnfield of the Łowicz meteorite (mesosiderite). While both the outer appearance of the specimen and its internal etched section closely resemble that of meteorites, as it includes pseudo-figures and pseudo-Neumann lines, the X-ray fluorescence (XRF) and scanning electron microscope (SEM) spectroscopy shows no signs of the nickel content in the iron-dominated alloy. This rules out the possibility of this specimen having outer space origin.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2023, 14; 93-99
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synthesis and Characterization of a Novel Aminoketooxime Ligand and Enzymatic Efficiencies of Its Metal Complexes
Autorzy:
Gorgulu, G.
Cicek, M.
Dede, B.
Powiązania:
https://bibliotekanauki.pl/articles/1029787.pdf
Data publikacji:
2018-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
oxime
metal complex
spectroscopy
catecholase
phenoxazinone synthase
Opis:
A novel aminoketooxime ligand and its mononuclear Cu(II) and Mn(II) complexes were synthesized. The structures of the synthesized compounds were illuminated by elemental analysis, inductively coupled plasma optical emission spectrometry, the Fourier transform infrared, ¹H- and ¹³C-NMR, UV-Vis, magnetic susceptibility and conductivity measurements. According to the characterization studies ligand to metal ratio was found to be 2:1 with strong binding affinity of the ligand to the metal ions. In addition, complexes have been tested for their catecholase and phenoxazinone synthase-like activities. Kinetic studies were also carried out yielding V_{max}, k_{cat} and K_{M} values of both complexes for catecholase and phenoxazinone synthase-like activities. Both complexes efficiently catalyzed the reactions of the enzymes they mimicked.
Źródło:
Acta Physica Polonica A; 2018, 133, 2; 244-249
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 72

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies