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Wyszukujesz frazę "35.20.My" wg kryterium: Temat


Wyświetlanie 1-9 z 9
Tytuł:
Anisotropy of the Diamagnetic Susceptibility in 3,5-dibromo-p-amino and 3,5-dibromo-p-hydroxybenzoic Acids
Autorzy:
Abdel-Kader, M. M.
Powiązania:
https://bibliotekanauki.pl/articles/1920927.pdf
Data publikacji:
1992-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
Opis:
The mean molar susceptibility (χ$\text{}_{M}$) for the two compounds 3,5-dibromo-p-aminobenzoic acid, Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-NH$\text{}_{2}$)COOH, and 3,5-dibromo-p-hydroxybenzoic acid, Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-OH)COOH, has been determined. The principal molecular susceptibilities K$\text{}^{∥}$ and K$\text{}^{⊥}$ have been evaluated. The magnetic anisotropy of each of the two compounds was obtained. From the atonic coordinates, as given by the X-ray structure analysis of Br$\text{}_{2}$C$\text{}_{6}$H$\text{}_{2}$(p-NH$\text{}_{2}$)COOH, the crystal susceptibilities (χ$\text{}_{a}$, χ$\text{}_{b}$, and χ$\text{}_{c}$) have been calculated. The magnetic properties are interpreted in the light of the crystal structure.
Źródło:
Acta Physica Polonica A; 1992, 82, 3; 407-411
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Studies of Optical Birefringence in Molecular Liquids. I. Liquids with Linear Temperature Dependence
Autorzy:
Błaszczak, Z.
Doiari, A.
Powiązania:
https://bibliotekanauki.pl/articles/1920618.pdf
Data publikacji:
1992-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
42.60.He
78.20.Dj
Opis:
We report the first systematic study of the temperature dependence of optically induced birefringence in benzene, toluene, nitrobenzene, chlorobenzene, 2-bromoanisole, 2-methylbenzaldehyde, 3-methylbenzaldehyde, 3-chlorobenzaldehyde and cinnamaldehyde. The optical Kerr constants, relative to benzene, are measured in a broad temperature range. Refractive indices and densities of the liquids for the temperatures studied were also determined. For the above liquids the T$\text{}^{-1}$ temperature dependences of the optical Kerr constants have been found. From our measurements, the molar Kerr constants and the effective molecular anisotropies were calculated as functions of temperature. The mean values of the second-order optical hyperpolarizability have also been determined.
Źródło:
Acta Physica Polonica A; 1992, 81, 4-5; 475-484
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dielectric Study of Dipolar Association in Dihalogenobenzenes
Autorzy:
Dutkiewicz, M.
Powiązania:
https://bibliotekanauki.pl/articles/1920936.pdf
Data publikacji:
1992-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
61.25.Em
82.60.Hc
Opis:
The nonlinear dielectric effect (NDE) has been studied in o-bromochlorobenzene and m-bromochlorobenzene, and their solutions in benzene. On the basis of NDE results and the values of electric permittivity ε, density d, and refractive index n obtained in this work, the molar polarizabilities: linear ⟨μ$\text{}^{2}$⟩ and nonlinear ⟨μ$\text{}^{4}$⟩ were calculated. Assuming dipolar association of the investigated dihalogenobenzenes molecules to be restricted to dimerization, the Gibbs energy ΔG$\text{}^{0}$$\text{}_{dim}$ of the dimerization process as a function of the Onsager field factor f(ε) is determined, which allowed us to draw a conclusion on the structure of associates.
Źródło:
Acta Physica Polonica A; 1992, 82, 3; 443-449
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electro-Optical Kerr Effect Measurements in Conducting Systems
Autorzy:
Prezhdo, O. V.
Khaschina, M. V.
Novikov, Yu. P.
Prezhdo, V. V.
Powiązania:
https://bibliotekanauki.pl/articles/2011054.pdf
Data publikacji:
1999-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
31.70.Dk
Opis:
A new method of investigation of electro-optical properties of conducting media is proposed based on a contactless scheme for capacitance measurements. Using alternating electric current, the method is applied to study Kerr effect in a series of single and multi-component conducting liquid systems.
Źródło:
Acta Physica Polonica A; 1999, 96, 3-4; 341-352
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Polarization of Onsager Fluids. 1. Dipole Polarization. 2. Binary Solutions of Organic Compounds
Autorzy:
Prezhdo, V. V.
Tyurin, S. A.
Prezhdo, O. V.
Tarasova, G. V.
Akulova, O. N.
Kurskaya, T. N.
Powiązania:
https://bibliotekanauki.pl/articles/1930619.pdf
Data publikacji:
1994-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
31.70.Dk
Opis:
Set forth in the previous report [1], the continual theory of dipole polarization of molecular fluids, which suggests substitution of the rigid Onsager sphere for the polarizable body and takes into consideration electric induction of this body and its nearest surroundings, is extended in this paper to binary solutions with diverse polarities. Dipole moments of free molecules of dissolved substances were calculated from experimental data of dielectrometry of a large number of extremely diluted organic substances and are close to the corresponding gaseous phase values. On the ground of solution polarization measurements the criterion of physical consistency of various models of the condensed medium internal field is proposed.
Źródło:
Acta Physica Polonica A; 1994, 85, 3; 509-515
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Polarization of Onsager Fluids. I. Dipole Polarization. 1. Electric Moments of Free Molecules
Autorzy:
Prezhdo, V. V.
Tarasova, G. V.
Prezhdo, O. V.
Tyurin, S. A.
Akulova, O. N.
Kurskaya, T. N.
Powiązania:
https://bibliotekanauki.pl/articles/1929543.pdf
Data publikacji:
1993-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
31.70.Dk
Opis:
An attempt was made to modify the model Onsager theory. A polarizable molecular dipole enclosed in a spherical cavity is substituted for a rigid one submerged in the polarizable medium which fills the cavity. The local dielectric permittivity of the Heaviside type is replaced for the oscillating, rapidly damping function of the Fresnel integral. The analytical expressions deduced allow to estimate dipoles of free molecules, starting from the results of dielectrometry of polar fluids. The obtained values are as close as possible to the experimental data on a great variety of pure organic liquids.
Źródło:
Acta Physica Polonica A; 1993, 84, 2; 253-258
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Polarization of Onsager Fluids. I. Dipole Polarization. 3. The Role of Universal Pairwise Interactions
Autorzy:
Prezhdo, V. V.
Tarasova, G. V.
Prezhdo, O. V.
Τyurin, S. A.
Ivanov, N. I.
Kurskaya, T. N.
Powiązania:
https://bibliotekanauki.pl/articles/1933603.pdf
Data publikacji:
1995-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
31.70.Dk
Opis:
A comparative study of the methods of interpretation of solvent influences on electric properties of molecules was conducted based on experimental dielectric properties of dilute solutions of organic substances of various polarity. It was shown that the solvent effect estimated via London-Debye-Keesom pairwise interaction potentials is best accounted for by theories of polarization of condense media which develop the anzatzes of reactive field and local dielectric permittivity.
Źródło:
Acta Physica Polonica A; 1995, 88, 3; 419-434
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Studies of Binary Mesophase Mixtures Containing N-(p-Propoxy Benzylidene)-p-Pentylaniline
Autorzy:
Ranga Reddy, R. N. V.
Reddy, K. C.
Murthy, V. R.
Powiązania:
https://bibliotekanauki.pl/articles/1931627.pdf
Data publikacji:
1994-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
35.20.My
61.30.-v
Opis:
The applicability of the modified Lippincott δ-function model method is tested for binary mesophase mixtures. Using this method, the polarizabilities, polarizability anisotropies and order parameters of binary mesophase mixtures containing N-(p-propoxy-benzylidene)-p-pentylaniline are evaluated and compared with the reported values. A close agreement is observed between the estimated values and reported values.
Źródło:
Acta Physica Polonica A; 1994, 86, 3; 385-391
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Progress into Understanding of Alkali Metal Interaction with a Silicon Surface
Autorzy:
Soukiassian, P.
Powiązania:
https://bibliotekanauki.pl/articles/1892155.pdf
Data publikacji:
1992-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
68.35.-p
73.20.At
79.60.Eq
82.65.My
Opis:
The atomic and electronic structure and interface formation of alkali metal (Na, K, Rb, Cs) and Si(100)2 × 1 surfaces is investigated by photoemission - XPS, UPS - using synchrotron radiation, scanning tunneling microscopy (STM) and by photoemission extended X-ray absorption fine structure (PEXAFS) experiments. The XPS-UPS results indicate that the alkali metal-silicon bond is a weak and polarized covalent bonding even at low coverages with adsorbate metallization at the monolayer. In contrast to III-V semiconductor surfaces, alkali metals do not induce significant structural changes of the surface: STM images performed with atomic resolution for the representative K/Si(100)2×1 systems demonstrate that, at one mono-layer coverage, the K atoms form one-dimensional linear metallic chains parallel to the Si dimers rows ⟨110⟩ direction and distant by 7.68 Å with a single site of adsorption. Below half a monolayer, the K atoms occupy various coexisting sites with no long range order. An ordering transition occurs around half a monolayer in which the adsorbate-adsorbate interaction, which was so far neglected in theoretical calculations, appears to be the leading driving force. The proposed models and concepts are discussed and compared to the latest state-of-art theoretical calculations.
Źródło:
Acta Physica Polonica A; 1992, 81, 1; 19-32
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-9 z 9

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