Temat: luminescence - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Active glasses as the luminescent sources of radiation for sensor applications
Autorzy:: Żmojda, J.
Dorosz, D.
Kochanowicz, M.
Dorosz, J.
Powiązania:: https://bibliotekanauki.pl/articles/201797.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tellurite glasses
antimony-silicate glasses
Yb3+
Tm3+
upconversion
blue luminescence
energy transfer
active glasses
Opis:: The article presents physicochemical, thermal and spectroscopic properties of two different glass systems: TeO_2-GeO_2-PbO_-PbF_2- BaO_-Nb₂O_5-LaF₃ and SiO_2-Al₂O_3-Sb₂O₃, co-doped with Yb³⁺/Tm³⁺ ions. Blue upconversion luminescence at a wavelength of 478 nm corresponding to the thulium ¹G₄ ⇥³H₆ transition was observed under 976 nm pump radiation in both of the co-doped glasses. This indicated the existence of efficient Yb3+ ⇥ Tm³⁺ energy transfer via three-photon absorption mechanism. Thermal and optical results substantiate the claim for practical applicability of the manufactured glasses in design of optical fiber sources.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2014, 62, 2; 393-397
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Depositional conditions on an alluvial fan at the turn of the Weichselian to the Holocene – a case study in the Żmigród Basin, southwest Poland
Autorzy:: Zieliński, P.
Sokołowski, R. J.
Fedorowicz, S.
Woronko, B.
Hołub, B.
Jankowski, M.
Kuc, M.
Tracz, M.
Powiązania:: https://bibliotekanauki.pl/articles/94513.pdf
Data publikacji:: 2016
Wydawca:: Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:: climate change
periglacial environment
fluvial processes
aeolian processes
luminescence dating
zmiana klimatu
środowisko peryglacjalne
procesy fluwialne
procesy eoliczne
datowanie luminescencyjne
Opis:: Presented are the results of research into the fluvio-aeolian sedimentary succession at the site of Postolin in the Żmigród Basin, southwest Poland. Based on lithofacies analysis, textural analysis, Thermoluminescence and Infrared-Optical Stimulated Luminescence dating and GIS analysis, three lithofacies units were recognised and their stratigraphic succession identified: 1) the lower unit was deposited during the Pleni-Weichselian within a sand-bed braided river functioning under permafrost conditions within the central part of the alluvial fan; 2) the middle unit is the result of aeolian deposition and fluvial redeposition on the surface of the fan during long-term permafrost and progressive decrease of humidity of the climate at the turn of the Pleni to the Late Weichselian; 3) the upper unit accumulated following the development of longitudinal dunes at the turn of the Late Weichselian to the Holocene; the development of dunes was interrupted twice by the form being stabilised by vegetation and soil development.
Źródło:: Geologos; 2016, 22, 2; 105-120
1426-8981
2080-6574
Pojawia się w:: Geologos
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: Luminescence and photosynthesis of marine phytoplankton - a brief presentation of new results
Autorzy:: Wozniak, B.
Dera, J.
Powiązania:: https://bibliotekanauki.pl/articles/47916.pdf
Data publikacji:: 2000
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: marine phytoplankton
pigment
luminescence
chlorophyll a
photosynthetic pigment
interaction
phytoplankton
light absorption
photosynthesis
Opis:: This volume contains a set of eight papers presenting the results of the latest research into the interaction of light with marine phytoplankton by teams from the Marine Physics Department at the IO PAS in Sopot, and the Department of Environmental Physics at the Pedagogical University of Słupsk. These results were presented at the ‘Second Workshop on Luminescence and Photosynthesis of Marine Phytoplankton’ (Sopot–Paraszyno, 11–15 October 1999) sponsored by the Polish State Committee for Scientific Research. This introductory article discusses the most important assumptions and objectives of the research, and outlines the latest results. These are subsequently discussed in detail in the following papers: (1) Majchrowski & Ostrowska, Influence of photo- and chromatic acclimation on pigment composition in the sea, (2) Woźniak et al., Model of the ‘in vivo’ spectral absorption of algal pigments. Part 1. Mathematical apparatus, (3) Majchrowski et al., Model of the ‘in vivo’ spectral absorption of algal pigments. Part 2. Practical applications of the model, (4)Ostrowska et al., Variability of the specific fluorescence of chlorophyll in the ocean. Part 1. Theory of classical ‘in situ’ chlorophyll fluorometry, (5) Ostrowska et al., Variability of the specific fluorescence of chlorophyll in the ocean. Part 2. Fluorometric method of chlorophyll a determination, (6) Ficek et al., Influence of non-photosynthetic pigments on the measured quantum yield of photosynthesis, (7) Ficek et al., Variability of the portion of functional PS2 reaction centres in the light of a fluorometric study. For the reader’s convenience, we append a list of the symbols denoting the physical quantities used in the texts. The nomenclature and denotations are in line with the conventions employed in the subject literature.
Źródło:: Oceanologia; 2000, 42, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Porfiryny zamknięte w żelu krzemionkowym
Porphyrins closed in sol-gel matrix
Autorzy:: Wiglusz, R. J.
Powiązania:: https://bibliotekanauki.pl/articles/172034.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: porfiryny
pochodne porfiryn
jony lantanowców
spektroskopia UV-VIS
luminescencja
zol-żel
porphyrins
porphyrin derivatives
lanthanide(III) ions
UV-Vis spectroscopy
luminescence
sol-gel
Opis:: The need for new, chemically and physically stable luminescent materials operating with UV excitations has stimulated research on luminescence properties of doped sol–gel material. In this work, it has been presented a technology of production of silica gels doped with organic molecules, lanthanide compounds and organic/inorganic composites. Optical properties of these materials as functions of temperature, concentration and excitation wavelength are presented. Dynamics of excited states has been discussed based on the decay times and emission efficiencies data. Mechanisms of ligand-to-metal energy transfer as well as other processes affecting emission efficiency are considered. Silica sol–gels doped with di-aminoacid derivatives of porphyrins: PP(Ser)2(Arg)2, PP(Ala)2(Arg)2, PP(Met)2(Arg)2, where Met, Arg and Ser denote methionine, serine and arginine aminoacids, respectively, and H2TTMePP {tetrakis[4-(trimethylammonio)phenyl]-21H,23H-porphine} have been obtained and spectroscopically studied. These materials can find applications as phosphors or sensors of UV irradiation.
Źródło:: Wiadomości Chemiczne; 2011, 65, 7-8; 675-703
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: How do marine bacteria produce light, why are they luminescent, and can we employ bacterial bioluminescence in aquatic biotechnology?
Autorzy:: Wegrzyn, G.
Czyz, A.
Powiązania:: https://bibliotekanauki.pl/articles/47472.pdf
Data publikacji:: 2002
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: aquatic biotechnology
bacterial bioluminescence
luminescence
marine pollution
environment
DNA repair
animal
bacteria
light
fungi
bioluminescence
marine bacteria
Opis:: Bioluminescence, the phenomenon of light production by living organisms, occurs in forms of life as various as bacteria, fungi and animals. Nevertheless, light-emitting bacteria are the most abundant and widespread of luminescent organisms. Interestingly, most species of such bacteria live in marine environments. In this article, the biochemical mechanism of bacterial luminescence and its genetic regulation are summarized. Although the biochemistry and genetics of light emission by cells have been investigated in detail, the biological role of bacterial luminescence has remained obscure. Here, we discuss recent discoveries that shed new light on this problem. Finally, we provide examples of how bacterial luminescence can be employed in marine biotechnology, especially in the detection of toxic and mutagenic pollution in aquatic environments.
Źródło:: Oceanologia; 2002, 44, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Przegląd najważniejszych prac dotyczących próby ustalenia daty spadku meteorytów oraz wieku kraterów Morasko
Review of most important papers regarding attempts to determine the date of Morasko meteorite fall and age of the craters
Autorzy:: Walesiak, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/1830331.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Meteorytowe
Tematy:: age
craters
dating
fall
luminescence
meteorite Morasko
palynological
radiocarbon
Opis:: One of criteria suggesting impact origin may be recognition of extraterrestrial matter inside or around suspected cavities. In case of Morasko some dating results throw doubt on link between craters and meteorites. Conclusion of some past research papers was that cavities were formed about 5 ka BP (e.g. palynological investigation, luminescence dating), while more or less facts testify fall in the Middle Ages (e.g. “young” charcoal pieces in crust of meteorites or shrapnel stuck in the roots of old tree). In this paper we perform comprehensive analysis of each result and check if there exists alternative explanation. During past palynological investigation, there were examined two craters. It was concluded that beginning of accumulation of sediments in smaller cavity started 5500–5000 BP. However, pollen spectrum for largest basin was different suggesting younger age. The problem is that according to bathymetric maps, samples could be collected from inner uplift (similar feature was observed inside Porzadzie and Jaszczulty, unconfirmed impact structures yet). If we compare profiles from craters with recent research (palynological study supported by radiocarbon dating) on sediments in Lake Strzeszynskie (6 km SW from Morasko) pollen spectrum seems to be similar more to results dated to <1000 BP. Especially percentage of non-arboreal pollen for both examined Morasko craters is much higher (5 times greater than it was for layer dated to 5 ka BP in Lake Strzeszynskie). Possibility of short disturbance (related to impact) cannot be excluded, but in such case any time of event should be taken into account. For small lakes (like those filling the craters) also local conditions could play important role. Analysis of luminescence dating may also discuss past conclusions. OSL method applied for samples taken from the thin layer of sand in the bottom of largest structure (under 3,9 m of organic sediments filling the crater) suggested age 5–10 ka BP for 24 aliquots. Same number of samples (24) revealed age 0–5 ka BP (13 samples with age <3 ka BP including several younger than 1 ka BP). Older dates can be explained by partial or even no zeroing, but last contact with light (zeroing signal) of sand grains (excavated from depth of almost 4 meters under organic matter) seems that might occur only during (or shortly after) the impact. It is difficult to find convincing arguments, which can undermine initial radiocarbon dating giving age <1 ka BP for 7 of 9 samples taken from the bottom layer of organic sediments from three Morasko craters. Same issue may exist with small charcoal pieces with age <2 ka BP (and several dated to ~700 BP) discovered deep in sinter-weathering crust of meteorites. Study of charcoal particles excluded their origin during post-sedimentary processes (like forest fire) unless meteorite fragments were laying directly on the surface for period between impact and wildfire (surviving whole time inhospitable climate conditions). There are two other possible explanations of charcoals. Either they were present at location as a result of past forest fire or they were produced during impact. However, similar small charcoal pieces were discovered around many craters (Kaali, Ilumetsa, Campo del Cielo, Whitecourt) and they were successfully used to estimate maximum age of those structures. During second stage of 14C dating the age obtained from three samples (taken few centimeters above the mineral bottom) was estimated ~5 ka BP. Looking for answer why these results are so different from previous once there may be mentioned at least two options. Lake sediments is difficult matter for radiocarbon dating and results may be hundreds or even thousands years older than real age. Second explanation may be that older matter (remnant of trees, paleosoil etc.), distributed around craters during impact, could be displaced by wind, rain, erosion and trapped in the bottom of cavities. The argument, which may be also against hypothesis of impact ~5 ka BP is meteorite shrapnel stuck in the roots of old tree. Result of expertise showed, that there exists mechanical damage in the wood and the only possible explanation is that meteorite has hit living tree. Maximum age, that this type of wood may preserve (inside building) is 1,8 ka while in natural environment not more than 500 years. Anyway some further examinations should be performed. The age obtained during AMS 14C dating of 2 samples from thin layer of paleosoil, discovered under overturned flap around largest Morasko crater, was ~5 ka BP. Observation that preserved layer of paleosoil is approximately 3 times thinner than thickness of modern soil may lead to conclusion that during impact top (younger) layer of organic sediments was removed and only older part “survived” in few locations close to the rim. The conclusion of the research was that dating provides maximum age of the impact (which does not exclude much younger impact <1 ka BP) so could be considered as right explanation of past discrepancies.
Źródło:: Acta Societatis Metheoriticae Polonorum; 2021, 12; 129-148
2080-5497
Pojawia się w:: Acta Societatis Metheoriticae Polonorum
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: Supramolecular complexes of cobalt(II), manganese(II) and cadmium(II) with bis(terpyridine) ligand as novel luminescent materials
Autorzy:: Wałęsa-Chorab, M.
Gorczyński, A.
Marcinkowski, D.
Hnatejko, Z.
Patroniak, V.
Powiązania:: https://bibliotekanauki.pl/articles/779935.pdf
Data publikacji:: 2013
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: luminescence
supramolecular complexes
transition metal ions
Opis:: Self-assembly of N6-donor bis(terpyridine) ligand L with transition metal ions: Co(II), Mn(II) and Cd(II) leads to a formation of three kinds of supramolecular complexes. In the electronic absorption and emission spectra of supramolecular complexes additional bands were observed what was ascribed to the coordination of ligand molecules to metal ions. Luminescence properties of these complexes strongly depend on the kind of metal ions and counter ions. The effective blue luminescence was observed in the case of Mn(II) and Cd(II) complexes in which all N-donor atoms of ligand molecules coordinate with the metal center.
Źródło:: Polish Journal of Chemical Technology; 2013, 15, 3; 91-95
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 8.

Tytuł:: Luminescence Properties of CaAl₂O₄:Eu³⁺, Gd³⁺ Phosphors Synthesized by Combustion Synthesis Method
Autorzy:: Verma, N.
Singh, K.
Marí, B.
Mollar, M.
Jindal, J.
Powiązania:: https://bibliotekanauki.pl/articles/1030093.pdf
Data publikacji:: 2017-10
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: phosphors
luminescence
combustion method
calcium aluminate
Opis:: CaAl₂O₄:Eu³⁺ (1 mol.%) co-doped with varying concentration of Gd³⁺ (1, 2, 5, and 10 mol.%) were prepared by combustion synthesis method at 600°C and further annealed at 1000°C. All the compositions were investigated for their structural and photoluminescence properties. It was observed that both states of europium i.e. Eu³⁺ and Eu²⁺ were present and ratio of these states changes on heating at 1000°C. The materials synthesized at 600°C showed high intense peak around 440 nm due to presence of Eu²⁺ and less intense peaks in the red region which were due to presence of Eu³⁺. On annealing the compounds at 1000°C, intensity of peak around 440 nm decreases and intensity of peaks in the red region increases significantly. The ⁵D₀ → ⁷F₃ transition due to Eu³⁺ at 657 nm appears as the highest intensity peak. All co-doped samples annealed at 1000°C showed the higher intensity than the mono doped sample which is due to energy transfer from the Gd³⁺ to Eu³⁺. The second rare-earth ion (Gd³⁺) acts as sensitizer and enhances the photoluminescence intensity. The X-ray diffraction spectra reveal the monoclinic phase of CaAl₂O₄ in all the samples which showed that Eu³⁺ and Gd³⁺ do not change the crystalline structure of calcium aluminate.
Źródło:: Acta Physica Polonica A; 2017, 132, 4; 1261-1264
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 9.

Tytuł:: Review of X-ray detection systems
Autorzy:: Urbański, Paweł
Grzebyk, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/27315700.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:: X-ray detection
X-ray radiation
dosimetry
luminescence
Opis:: The article presents an overview and a classification of X-ray detection methods. The main motivation for its preparation was the need to select a suitable and useful method for detecting signals from a currently developed miniature micro-electro-mechanical system (MEMS) X-ray source. The described methods were divided into passive and active ones, among which can be distinguished: chemical, luminescent, thermo-luminescent, gas ionization, semiconductor, and calorimetric methods. The advantages and drawbacks of each method were underlined, as well as their usefulness for the characterisation of the miniature MEMS X-ray source.
Źródło:: Opto-Electronics Review; 2023, 31, 3; art. no. e146554
1230-3402
Pojawia się w:: Opto-Electronics Review
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 10.

Tytuł:: Luminescencyjne sensory tlenu, ciśnienia i temperatury
Oxygen, pressure and temperature luminescent sensors
Autorzy:: Tsvirko, M.
Kalota, B.
Powiązania:: https://bibliotekanauki.pl/articles/171947.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: luminescencja
metaloporfiryny
kompleksy europu
sensory tlenu
sensory ciśnienia
sensory temperatury
luminescence
metalloporphyrins
europium complexes
oxygen sensors
pressure sensors
temperature sensors
Opis:: Optical chemical sensors enlarge the definition of a classical chemical sensor; they present results in two-dimensional (2D) or three-dimensional (3D) aspect. They can determine parameters of micro and macro scale objects without using a lot of electronic equipment. This article is focused on sensors based on porphyrin derivatives and europium complexes, being the most frequently used substances sensitive to oxygen concentration, pressure and temperature changes. Along with the presentation of characteristics of substances employed to sensors’ construction, also the general principle of luminescent sensors operation, composition and operation range of selected mono- and bifunctional luminescent sensors are described; moreover the selected achievements, such as the “traffic light” sensor are shown.
Źródło:: Wiadomości Chemiczne; 2011, 65, 11-12; 1069-1097
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 11.

Tytuł:: Effect of moisture treatment on the ultraweak luminescence from imbibing wheat grain
Autorzy:: Tryka, S.
Wozniak, W.
Powiązania:: https://bibliotekanauki.pl/articles/25174.pdf
Data publikacji:: 1998
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:: imbibing
moisture
structure
wheat
ultraweak luminescence
grain
endosperm
mealy grain
porous structure
germination
seed
Źródło:: International Agrophysics; 1998, 12, 2
0236-8722
Pojawia się w:: International Agrophysics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 12.

Tytuł:: Tris(8-hydroxyquinoline)aluminium in a polymer matrix as an active layer for green OLED applications
Autorzy:: Sypniewska, Małgorzata
Pokladko-Kowar, Monika
Kaczmarek-Kedziera, Anna
Brumboiu, Iulia E.
Figà, Viviana
Apostoluk, Aleksandra
Song, Peng
Liu, Junyan
Szczesny, Robert
Gondek, Ewa
Derkowska-Zielinska, Beata
Powiązania:: https://bibliotekanauki.pl/articles/2204187.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:: Tris(8-hydroxyquinoline)aluminium
OLED
photo-and electro-luminescence
spectroscopic ellipsometry
DFT calculation
Opis:: Tris(8-hydroxyquinoline)aluminium with poly(N-vinylcarbazole) (Alq₃:PVK) or polystyrene sulfonate (Alq₃:PSS) were deposited by spin-coating on glass and silicon substrates. SEM measurements show that relatively smooth thin films were obtained. Fourier transform infrared measurements were performed to confirm the composition of the samples. The optical properties of thin films containing Alq₃:PVK and Alq₃:PSS were characterised using absorption spectroscopy and spectroscopic ellipsometry. It was found that the absorption spectrum of Alq₃:PVK is characterised by four bands, while for Alq₃:PSS only three bands are visible. The photoluminescence of the studied thin layers shows a peak with a maximum at about 500 nm. Additionally, cyclic voltammetry of Alq₃ is also presented. Theoretical density functional theory calculations provide the insight into the interaction and nature of Alq₃:PVK and Alq₃:PSS excited states. Finally, the organic light-emitting diode (OLED) structure based on Alq₃:PVK was fabricated and showed strong electroluminescence with a green emission at 520 nm. The results of the device show that the ITO/PEDOT:PSS/Alq₃:PVK/Ca/Al system can be useful for the production of low-cost OLEDs with Alq₃:PVK as an active layer for future lighting applications.
Źródło:: Opto-Electronics Review; 2023, 31, 2; art. no. e146105
1230-3402
Pojawia się w:: Opto-Electronics Review
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 13.

Tytuł:: Nowe dane luminescencyjne wieku impaktów w Morasku oraz Kaali
The new luminescence data of the Morasko and Kaali impacts
Autorzy:: Stankowski, Wojciech
Powiązania:: https://bibliotekanauki.pl/articles/1032687.pdf
Data publikacji:: 2009
Wydawca:: Polskie Towarzystwo Meteorytowe
Tematy:: Kaali impact
Morasko impact
luminescence data
meteorites
Opis:: The identified features of the shells/skins which have developed around the four big Morasko meteorites found in 2006 year, indicate the existence of shock pressure and high temperature in the immediate vicinity of the falling lumps. This was also the moment when zeroing of the luminescence occurred. The results obtained for the dating of the meteorite shells/skins using the TL technique prove the age of luminescence zeroing about 5000 to 6000 years ago. TL dating of meteorite shells/skins was preceded by OSL measurements in the mineral sediments situated in the beds of Morasko hollows A and B, directly below the organic filling sediment. The Morasko crater A mineral bottom is constituted by deformed sediments from the Neogene “Poznań series”. In the crater B mineral bottom the glacial sediments exists – not younger than the “Poznań phase” of last Scandinavian glaciation. The theoretical youngest age all of these sediments is 17000-18000 years BP. The OSL results obtained into 101 measured portions of mineral material from the hollows, prove its rejuvenation. There are many indices <5000 years (13%) and in between 5000-10000 years (30%), totally 43%. Data from TL and OSL measurements for the area of the Morasko Meteorite Reserve are an indicator of the luminescence zeroing (both the shells/skins of meteorites and depressions bottom sediments), occurring around 5000 years ago. In Morasko area a local grouped fall of extraterrestrial material as well as craters creation took place. The Estonian Kaali main crater and surrounding small craters were examined too. The TL data from the material of main crater rim, the material from inside slope of crater 1 and the powered Silurian dolomites at the bottom of crater 4, gave a similar results – 5000-6000 years BP. Also older data (up to 11500 years BP) were obtained in the mixture of Quaternary and Silurian dolomite detritus of the inside slope crater 1 and at the rim top of crater 2/8. The OSL data have given the similar results. The comparative study to the Ilumetsa and Tsõõrikmäe relatively small craters were performed. The Devonian sandstones exist there beneath the local features and sediments of Quaternary age. The measurement results of OSL technique do not evidence so clear data as in Kaali site. Only few indicators were young (<4500 year BP). Most of data seems to be under influence of not complete bleaching of old rocks luminescence signal. The attempt of the TL and OSL measurements to impact time establish lead to the following conclusion: a) explosive – “high energetic” events to be effective of full zeroing luminescence and impact time establish, b) the striking – “low energetic” events are less effective in bleaching luminescence and impact time establish.
Źródło:: Acta Societatis Metheoriticae Polonorum; 2009, 1; 123-128
2080-5497
Pojawia się w:: Acta Societatis Metheoriticae Polonorum
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 14.

Tytuł:: O eksperymentach Michała Jana Borcha (1753–1811) dotyczących chemiluminescencji
The experiments of Michał Jan Borch (1753–1811) concerning chemiluminescence
Autorzy:: Siemion, I. Z.
Szastyńska-Siemion, A.
Powiązania:: https://bibliotekanauki.pl/articles/172774.pdf
Data publikacji:: 2013
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: Borch Jan Michał
działalność naukowa
luminescencja morza
luminescencja zepsutych mieczników
M. Borch’s scientific activity
sea luminescence
luminescence of decaying swordfish
Opis:: In the paper, the scientific activities of Polish scientist Michał Jan Borch (1753–1811) are briefly discussed, The Polish translation of Borch’s article (published in “Atti dell’ Academia della Scienza di Siena” in 1781) on the luminescence of the sea and different ideas on what could cause the phenomenon is presented. The attempts of Borch to isolate the luminescence – generating substance from decaying swordfish are discussed in the light of some later data on the chemiluminescence of organic compounds, Connected to bioluminescence experiments of our other scientists of that time (G. Forster and K. Kortum) are also quoted.
Źródło:: Wiadomości Chemiczne; 2013, 67, 3-4; 361-368
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 15.

Tytuł:: Effects of Radiation Doses on the Photostimulated Luminescence Response of Certain Herbs and Spices
Autorzy:: Sandeva, I.
Spasevska, H.
Ginovska, M.
Stojanovska-Georgievska, L.
Powiązania:: https://bibliotekanauki.pl/articles/221337.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: food
ionizing radiation
photostimulated luminescence
Opis:: Ionizing radiation applied on food eliminates harmful microorganisms, prevents sprouting and delays ripening. All methods for detection of irradiated food are based on physical, chemical, biological or microbiological changes caused by the treatment with ionizing radiation. When minerals are exposed to ionizing radiation, they accumulate radiation energy and store it in the crystal lattice, by which some electrons remain trapped in the lattice. When these minerals are exposed to optical stimulation, trapped electrons are released. The phenomenon, called optically stimulated luminescence or photostimulated luminescence, occurs when released electrons recombine with holes from luminescence centers in the lattice, resulting in emission of light with certain wavelengths. In this paper, the results of measurements performed on seven different samples of herbs and spices are presented. In order to make a comparison between luminescence signals from samples treated with different doses, unirradiated samples are treated with Co-60 with doses of 1 kGy, 5 kGy and 10 kGy. In all cases it was shown that the higher the applied dose, the higher the luminescence signal.
Źródło:: Metrology and Measurement Systems; 2017, 24, 1; 143-151
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "luminescence" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język