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Tytuł:
Dependence of energy of heat radiation of molecules from its kinetic energy
Autorzy:
Golovkin, B. G.
Powiązania:
https://bibliotekanauki.pl/articles/1178020.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
gas cell
kinetic energy of a molecule
radiation energy of a molecule
temperature of a molecule
Opis:
A formula is derived for the dependence of the thermal radiation energy of a gas molecule on its kinetic energy. From this formula it follows that the radiation energy of a molecule is not equal to its kinetic energy. Since the mean free path of molecules is larger in more rarefied gases, the energy of thermal radiation in such gases is, accordingly, greater. For the same reason, the smaller the size of the gas molecules, the volume of empty space in such a gas will be greater, and, consequently, the gas will be more discharged, so that the energy of emission of gas molecules in comparison with the kinetic energy of the molecule will be even greater.
Źródło:
World Scientific News; 2018, 96; 233-236
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical bistability in double quantum dot molecule with inter-dot tunnelling
Autorzy:
Yu, Chunchao
Sun, Lihui
Zhang, Huafeng
Chen, Fang
Powiązania:
https://bibliotekanauki.pl/articles/174307.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
optical bistability
quantum dot molecule
tunneling
Opis:
We have theoretically studied the optical bistability behaviors under an external electric field and a coupling laser field in double quantum dot molecule system with π-type four energy levels. It can be adjusted by the system parameters such as the electronic cooperation parameter, the tunneling strength, the coupling laser field, the probe and coupling laser detuning. These results may be useful in the experiment and provide new types of all-optical switching.
Źródło:
Optica Applicata; 2019, 49, 2; 293-301
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Single-hole one-electron superexcited states and doubly-excited states of molecules as studied by coincident electron-energy-loss spectroscopy
Autorzy:
Odagiri, T.
Fukuzawa, H.
Takahashi, K.
Kouchi, N.
Hatano, Y.
Powiązania:
https://bibliotekanauki.pl/articles/148525.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
doubly-excited molecule
electron energy loss spectroscopy
H2
N2
O2
superexcited molecule
Opis:
The single-hole one-electron superexcited states and doubly-excited states of H2, D2, N2 and O2 have been investigated by means of the coincident electron-energy-loss spectroscopy that we developed. In this method the electron-energy-loss spectra tagged with the vacuum ultraviolet fluorescences emitted by the neutral fragments produced from superexcited molecules are measured by means of electron-photon coincidence technique. The contribution from ionization in this sort of electronenergy- loss spectra is suppressed to a large extent, and thus the structures attributed to the superexcited states of molecules become highlighted. The comparison with the photoexcitation experiments by means of the oscillator strengths give us clear discrimination between allowed and forbidden superexcited-states. As to H2, D2, and N2, the doubly-excited states including those found in the present experiment have been investigated in terms of both their energies and dynamical behavior. A new possibility of the coincident electron-energy-loss spectroscopy has been established in investigating the single-hole one-electron superexcited states of O2: the time-resolved coincident electron-energy-loss spectrum has been measured to distinguish between the direct process producing excited oxygen atoms and indirect one due to cascade transition. It has turned out that the coincident electron-energy-loss spectroscopy is a key tool for investigating superexcited molecules.
Źródło:
Nukleonika; 2003, 48, 2; 95-102
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The POCOBIO Database for Computed Scattering Cross-Sections for Positron Collisions with Biomolecular Systems
Autorzy:
Franz, J.
Powiązania:
https://bibliotekanauki.pl/articles/1030032.pdf
Data publikacji:
2017-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
positron-molecule scattering
quantum calculations
molecular gases
Opis:
The design of a database for positron interactions with biomolecular systems is outlined. The database contains only scattering cross-sections, which are derived from theory. The data model is defined in a very flexible way, which facilitates the usage of weakly bound clusters of molecules and molecular systems with many tautomeric forms.
Źródło:
Acta Physica Polonica A; 2017, 132, 5; 1478-1481
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecule dissociation at the Fe3O4 (001) surface
Autorzy:
Kim-Ngan, N.-T. H.
Jagło, D.
Sitko, D.
Soszka, W.
Powiązania:
https://bibliotekanauki.pl/articles/411955.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Magnetite surface
low energy ion scattering
molecule dissociation
Opis:
The molecular dissociation at the single-crystalline Fe3O4 (001) surface has been investigated using the diatomic H+2 , D+2 and N+2 molecules in the energy range of 3�{8 keV and in the temperature range of 90 K�{300 K. The single collision of ions released from dissociation with the surface atoms was observed only for the N2+ molecules. The detail analysis confirmed that for the light molecules such as H2+ and D2+ the charge-transfer process dominate the interaction of a molecule with the magnetite surface. A large change in the scattered ion yields around the Verwey phase transition temperature was observed indicating a strong correlation between the molecule dissociation and the electronic state of the magnetite surface.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 2; 1-10
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double tunneling induced transparency in the asymmetry quantum dot molecules
Autorzy:
Yu, C.
Huang, H.
Zhang, L.
Xu, D.
Powiązania:
https://bibliotekanauki.pl/articles/173599.pdf
Data publikacji:
2016
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
quantum dot molecule
slow light
tunneling induced transparency
Opis:
Using the density matrix theory, we have studied the double tunneling induced transparency slow light in the double asymmetry quantum dot molecules. With applied electric field, double tunneling induced transparency occur in the same time. Four absorption peaks are found near the resonance energy level in the absorption spectrum and the absorption peak can be tuned by the applied electric field. The velocity and bandwidth of the multiple-windows slow light can also be controlled by the applied electric field. In our model, with Te =0.1meV, we can get about 0.001c and 20GHz bandwidth in each transparency window. Such a property may be applied in all optical buffers, optical switching and filter.
Źródło:
Optica Applicata; 2016, 46, 3; 473-481
0078-5466
1899-7015
Pojawia się w:
Optica Applicata
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Molecular simulation study on hydration of low-rank coal particles and formation of hydration film
Autorzy:
Xia, Yangchao
Yang, Zili
Xing, Yaowen
Gui, Xiahui
Powiązania:
https://bibliotekanauki.pl/articles/949689.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
low rank coal
water molecule
hydration film
molecular simulation
Opis:
Water molecules in low-rank coal (LRC) significantly influence its upgrading and utilization. To investigate the hydration of LRC particles and the formation of a hydration film, molecular simulation techniques were innovatively used, including molecular dynamics (MD) simulations and density functional theory (DFT) calculations. The adsorption of water molecules on LRC and various oxygen-containing groups was analyzed. The results show that water molecules adsorb close to the LRC surface and form a large overlapping layer at the LRC/water interface. The radial distribution functions (RDFs) show that the adsorption affinity of water molecules on oxygen-containing sites is stronger than that on carbon-containing sites, and the RDF peaks indicate the existence of a hydration film. Moreover, the differences in adsorption between various oxygen-containing groups depend on both the number of hydrogen bonds and the adsorption distances. The calculated binding energies indicate that the adsorption capacity follows the order carboxyl > phenolic hydroxyl > alcoholic hydroxyl > ether linkage > carbonyl. Experimental results show that a high sorption rate exists between water vapor and LRC samples at the beginning of sorption, which verified the simulation results.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 2; 586-596
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Some non-homogeneous Hardy spaces on locally compact Vilenkin groups
Autorzy:
Lu, Shanzhen
Yang, Dachun
Powiązania:
https://bibliotekanauki.pl/articles/965121.pdf
Data publikacji:
1996
Wydawca:
Polska Akademia Nauk. Instytut Matematyczny PAN
Tematy:
Vilenkin group
dual space
Herz space
atom
Hardy space
molecule
Źródło:
Colloquium Mathematicum; 1996, 69, 1; 1-17
0010-1354
Pojawia się w:
Colloquium Mathematicum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Materiality of Language in Jain Philosophy: Introductory Matters
Autorzy:
Glinicka, Małgorzata
Powiązania:
https://bibliotekanauki.pl/articles/945996.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
Jainism
language
matter
molecule
substance
mode
multidimensionality
living being
causality
Opis:
This article would not have been possible without the scientific guidance and support of Dr. Priyadarshana Jain, Assistant Professor and Head i/c, Department of Jainology, University of Madras, who had presented to me a very complex and coherent vision of matter from Jaina point of view and a problem of vargaṇās, with special accentuation laid on bhāṣā-vargaṇās and an issue of omniscience. Dr. Jain indicated also Ālāpa-paddhati as a source of unprecedented knowledge on basic facts of the Jain philosophy.
Źródło:
Internetowy Magazyn Filozoficzny Hybris; 2016, 35 (4)
1689-4286
Pojawia się w:
Internetowy Magazyn Filozoficzny Hybris
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ortho-para spin conversion of Ps by paramagnetic O2 dissolved in organic compounds
Autorzy:
Zgardzińska, B.
Białko, W.
Jasińska, B.
Powiązania:
https://bibliotekanauki.pl/articles/971542.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
alcohols
cyclohexane
isooctane
n-alkanes
ortho-para conversion
paramagnetic molecule
Opis:
The o-Ps mean lifetime value in liquids decreases in the presence of the paramagnetic oxygen molecules via the ortho-para conversion process. This effect was observed for several organic samples composed of carbon and hydrogen atoms differing in the arrangement of atoms forming the molecule, e.g. n-alkanes, alcohols, branched isomer of alkane, cycloalkane. The usually observed tendency of the o-Ps lifetime value to be an increasing function of temperature (in the case of measurements performed in vacuum) changes to a decreasing one in the presence of O2 dissolved in the sample. The difference between the o-Ps lifetimes measured in samples in vacuum and in the presence of O2 increases with the distance from the melting point. The ortho-para constant rate λconv was estimated to be ~130 μs–1 at 300 K for three compounds investigated.
Źródło:
Nukleonika; 2015, 60, No. 4, part 1; 801-804
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and dynamics of water adsorbed on the lignite surface: Molecular dynamics simulation
Autorzy:
You, Xiaofang
He, Meng
Cao, Xiaoqiang
Lyu, Xianjun
Li, Lin
Powiązania:
https://bibliotekanauki.pl/articles/109688.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
low rank coal
water molecule
oxygen-containing functional groups
molecular dynamics
Opis:
The effects of oxygen-containing functional groups on the structure and dynamic properties of water molecules near a lignite surface were investigated through molecular dynamics (MD) simulations. Because of its complex composition and structure, a graphite surface containing hydroxyl, carboxyl, and carbonyl groups was used to represent the lignite surface model. According to X-ray photoelectron spectroscopic (XPS) results, the composing proportion of hydroxyl, carbonyl and carboxyl is 21:13:6. The density profiles of oxygen and hydrogen atoms indicate that the brown coal surface characteristics influence the structural and dynamic properties of water molecules. The interfacial water is much more ordered than bulk water. The results of the radial distribution functions, mean square displacements, and local self-diffusion coefficients for the water molecules in the vicinity of three oxygen-containing functional groups confirmed that carboxyl groups are the preferential adsorption sites.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 1; 10-20
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Współczesna rewolucja naukowa na pograniczu fizyki i biologii
The Present Scientific Revolution on the Borderline between Physics and Biology
Autorzy:
Ślósarek, Genowefa
Powiązania:
https://bibliotekanauki.pl/articles/690980.pdf
Data publikacji:
2012
Wydawca:
Copernicus Center Press
Tematy:
scientific revolution
molecular biology
biophysics
nanotechnology
single-molecule methods
system biology
Opis:
At the end of the 20th century, substantial changes in the paradigms of molecular physics and biology occurred. They have brought two new and entirely independent, fields of scientific research – nanotechnology and systems biology. Thanks to these disciplines, a new paradigm was born opening a new way of research in biology. It enables a holistic treatment of living organisms. As a consequence of these changes, an entirely new picture of the interface between physics and biology emerges.
Źródło:
Zagadnienia Filozoficzne w Nauce; 2012, 51; 96-115
0867-8286
2451-0602
Pojawia się w:
Zagadnienia Filozoficzne w Nauce
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A Tiny 2.4 GHz Monopole Water Antenna
Autorzy:
Chinen, Koyu
Kinjo, Ichiko
Powiązania:
https://bibliotekanauki.pl/articles/27311972.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
water antenna
polar molecule
S-parameter
monopole antenna
underwater wireless communication
Opis:
We designed, fabricated, and evaluated a monopole water antenna (WA) filled with pure water. A 2.4 GHz patch antenna (PA) was used for measurement comparison, and the current density distribution and 3D field strength radiation distribution and reflection coefficient of the PA had a fundamental mode and a higher-order mode at 3.5 GHz, whose polarization was 90 degrees different. The 2.4 GHz monopole WA could receive only the fundamental mode of the PA. The 3.5 GHz WA could receive the higher-order mode of the PA by rotating the WA by 90 degrees. The transmission coefficient of the 2.4 GHz WA decreased with the square of the spacing, similar to the spatial propagation characteristics of electromagnetic waves. Almost the same results could be expected if planar or three-dimensional antennas were used instead of monopole electrodes.
Źródło:
International Journal of Electronics and Telecommunications; 2023, 69, 3; 455--460
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The microRNA-guided regulation of tillering in barley
Autorzy:
Pacak, A.
Kruszka, K.
Swida-Barteczka, A.
Karlowski, W.
Jarmolowski, A.
Szweykowska-Kulinska, Z.
Powiązania:
https://bibliotekanauki.pl/articles/951225.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
microRNA
RNA molecule
gene expression
plant development
heat stress
transcription factor
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2015, 96, 1
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
How to study G-quadruplex structures
Autorzy:
Malgowska, M.
Gudanis, D.
Teubert, A.
Dominiak, G.
Gdaniec, Z.
Powiązania:
https://bibliotekanauki.pl/articles/80131.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
guanine
DNA molecule
RNA molecule
molecular structure
intramolecular structure
intermolecular structure
G-quadruplex structure
circular dichroism spectroscopy
ultraviolet spectroscopy
electrospray ionization mass spectrometry
nuclear magnetic resonance
Źródło:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2012, 93, 4
0860-7796
Pojawia się w:
BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 50

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