Temat: acoustical activity - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Acoustic Hysteresis in Flows with Different Kinds of Relaxation and Attenuation
Autorzy:: Perelomowa, Anna
Powiązania:: https://bibliotekanauki.pl/articles/31339946.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: relaxation
acoustic hysteresis
acoustical activity
Opis:: Graphs in the thermodynamic plane acoustic pressure versus excess acoustic density representing acoustic hysteresis, are considered as indicators of relaxation processes, equilibrium parameters of a flow, and kinds of wave exciters. Some flows with deviation from adiabaticity are examined: the Newtonian flow of a thermoconducting gas, the flow of a gas with vibrational relaxation, the flow of liquid electrolyte with a chemical reaction, and the Bingham plastic flow. The total range of characteristic frequencies of a harmonic exciter is taken into account. The impulsive sound is considered as well. The peculiarities of hysteretic behaviour are discussed in dependence with the kind and degree of deviation form adiabaticity. Examples of acoustically active flows are discussed.
Źródło:: Archives of Acoustics; 2022, 47, 4; 519-527
0137-5075
Pojawia się w:: Archives of Acoustics
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Ultrasonic Assisted Synthesis, Acoustical Property and Antibacterial Activity of Some Schiff Bases
Autorzy:: Premalatha, R.
Santhi, N.
Powiązania:: https://bibliotekanauki.pl/articles/412100.pdf
Data publikacji:: 2014
Wydawca:: Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:: substituted anilines
3-bromo-4-fluorobenzaldehyde
Schiff bases
ultrasonication
acoustical parameters and antimicrobial activity
Opis:: An efficient, simple clean synthesis of Schiff bases of some 4-nitroaniline/ 2,4-dinitroaniline/ 3,4-dichloroaniline / 4-methoxy-3-nitro aniline with 3-bromo-4-fluorobenzaldehyde were done by an ultrasound irradiation method. The major advantages of ultra-sonication are short reaction time, operational simplicity, high yield, easy workup and environment friendly procedure. The isolated compounds obtained by ultrasound irradiation method were characterized by UV, IR and NMR spectral data. These acoustical parameters were determined. Furthermore their antibacterial activities are screened against certain strains of bacteria and showed significant anti-microbial activity.
Źródło:: International Letters of Chemistry, Physics and Astronomy; 2014, 14, 1; 53-64
2299-3843
Pojawia się w:: International Letters of Chemistry, Physics and Astronomy
Dostawca treści:: Biblioteka Nauki

Artykuł

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