scholarly journals Molecular Rotation Spectrum of Tetracyclic Quinolizidines: Observation of trans-Matrine and the Elusive cis-Matrine

2021 ◽  
Author(s):  
Marcos Juanes ◽  
Rizalina Tama Saragi ◽  
Lourdes Enríquez ◽  
Martín Jaraíz ◽  
Alberto Lesarri
Keyword(s):  
Molecular Rotation ◽  
Rotation Spectrum

Switching Aromatic Character by Complexation: π to π* Change Seen in Molecular Rotation Spectra

2021 ◽  
pp. 5150-5155
Author(s):  
Hao Wang ◽  
Junhua Chen ◽  
Chunguo Duan ◽  
Xuefang Xu ◽  
Yang Zheng ◽  
...  
Keyword(s):  
Molecular Rotation ◽  
Aromatic Character

scholarly journals Real-time observation of ultrafast molecular rotation in weakly bound dimers

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Jiaqi Zhou ◽  
Chaoxiong He ◽  
Ming-Ming Liu ◽  
Enliang Wang ◽  
Shaokui Jia ◽  
...  
Keyword(s):  
Real Time ◽  
Molecular Rotation ◽  
Weakly Bound ◽  
Time Observation ◽  
Real Time Observation

Tunneling-rotation spectrum of the hydrogen fluoride dimer

1990 ◽  
Vol 141 (2) ◽  
pp. 204-222 ◽  
Author(s):  
S.P. Belov ◽  
E.N. Karyakin ◽  
I.N. Kozin ◽  
A.F. Krupnov ◽  
O.L. Polyansky ◽  
...  
Keyword(s):  
Hydrogen Fluoride ◽  
Rotation Spectrum

Spectral ratio comparison between translation and rotational records from induced seismic events.

2021 ◽  
Author(s):  
Dariusz Nawrocki ◽  
Maciej Mendecki ◽  
Lesław Teper
Keyword(s):  
Seismic Data ◽  
Seismic Station ◽  
Spectral Ratio ◽  
Numerical Differentiation ◽  
Vertical Axis ◽  
Frequency Range ◽  
Signal Ratio ◽  
Seismic Waveforms ◽  
Seismic Tests ◽  
Rotation Spectrum

<p>The seismic observations of the rotational signals are a field of seismology that is constantly developed. The recent research concerns sensors technology and its potential application in seismic tests. This study presents the results of a comparative analysis of rotational and translational seismic records using the horizontal-to-vertical spectral ratio (HVSR) method. In terms of transitional signal ratio, we have used the name of HVSR, but in terms of rotational component spectra, we have introduced a torsion-to-rocking spectral ratio (TRSR) which corresponds to horizontal rotation spectrum to vertical rotation spectrum. It has to be noticed that rotation in the horizontal axes has a vertical character and rotation in the vertical axis has a horizontal character.</p><p>The comparison was carried out between velocity signals of translational and rotational records, as well as, between acceleration signals respectively. All seismic data were recorded by two independent sensors: the rotational seismometer and translational accelerometer at the Imielin station, located in the Upper Silesia Coal Basin (USCB), Poland. The seismic data composed of three-component seismic waveforms related to 56 recorded tremors which were located up to 1,5 km from the seismic station and they resulted from the coal extractions carried out in the neighboring coal mines. The rotational acceleration was obtained by numerical differentiation and the translational velocity was produced by numerical integration.</p><p>The conducted spectral analyses allowed to estimate the range of frequency in which the rotational HVSR and the corresponded translational HVSR are comparable. The analysis of HVSR/TRSR curves (in the selected frequency range of 1Hz to 10Hz) showed a strong correlation between the spectral ratios for the velocity signals (translational and rotational) in the frequency range of 1Hz to 2Hz. Respectively, the comparison of the accelerometer signals indicated the correlation between HVSR/TRSR curves in the frequency range of 1Hz to 3Hz. Moreover, both of the TRSR (for velocity and acceleration) showed additional maxima in the same frequency range of 3Hz to 5Hz. These relatively high-frequency maxima did not correspond to translational spectra.  </p>

Acetonen-radical cation internal rotation spectrum: The torsional potential surface

2000 ◽  
Vol 112 (6) ◽  
pp. 2762-2768 ◽  
Author(s):  
Dana A. Shea ◽  
Lionel Goodman ◽  
Michael G. White
Keyword(s):  
Internal Rotation ◽  
Radical Cation ◽  
Potential Surface ◽  
Torsional Potential ◽  
Rotation Spectrum
Sign in / Sign up

Export Citation Format

Share Document