scholarly journals Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems

2018 ◽  
Vol 51 (18) ◽  
pp. 7134-7144 ◽  
Author(s):  
Lambert Baij ◽  
Joen J. Hermans ◽  
Katrien Keune ◽  
Piet D. Iedema
Keyword(s):  
Spectroscopic Studies ◽  
Model Systems ◽  
Time Dependent ◽  
Solvent Diffusion

scholarly journals Correction to Time-Dependent ATR-FTIR Spectroscopic Studies on Solvent Diffusion and Film Swelling in Oil Paint Model Systems

2018 ◽  
Vol 51 (18) ◽  
pp. 7419-7419
Author(s):  
Lambert Baij ◽  
Joen J. Hermans ◽  
Katrien Keune ◽  
Piet D. Iedema
Keyword(s):  
Spectroscopic Studies ◽  
Model Systems ◽  
Time Dependent ◽  
Solvent Diffusion

scholarly journals Time-Dependent ATR-FTIR Spectroscopic Studies on Fatty Acid Diffusion and the Formation of Metal Soaps in Oil Paint Model Systems

2018 ◽  
Vol 130 (25) ◽  
pp. 7473-7476 ◽  
Author(s):  
Lambert Baij ◽  
Joen J. Hermans ◽  
Katrien Keune ◽  
Piet Iedema
Keyword(s):  
Fatty Acid ◽  
Spectroscopic Studies ◽  
Model Systems ◽  
Time Dependent ◽  
Acid Diffusion ◽  
Metal Soaps

Growth of fluctuations in quenched time-dependent Ginzburg-Landau model systems

1978 ◽  
Vol 17 (1) ◽  
pp. 455-470 ◽  
Author(s):  
Kyozi Kawasaki ◽  
Mehmet C. Yalabik ◽  
J. D. Gunton
Keyword(s):  
Model Systems ◽  
Time Dependent ◽  
Ginzburg Landau ◽  
Landau Model

Synthesis, Characterization, Cytotoxicity, and Time-Dependent NMR Spectroscopic Studies of (SP -4-3)-Oxalato[(1R ,2R ,4R /1S ,2S ,4S )-(4-trifluoromethyl-cyclohexane-1,2-diamine)]platinum(II)

2019 ◽  
Vol 2019 (6) ◽  
pp. 856-864 ◽  
Author(s):  
Selin Hizal ◽  
Michaela Hejl ◽  
Christoph Jungmann ◽  
Michael A. Jakupec ◽  
Markus Galanski ◽  
...  
Keyword(s):  
Spectroscopic Studies ◽  
Time Dependent

scholarly journals Pulsations in O Stars

1999 ◽  
Vol 169 ◽  
pp. 305-311
Author(s):  
Hubertus F. Henrichs
Keyword(s):  
Line Profile ◽  
Spectroscopic Studies ◽  
Spectral Lines ◽  
Time Dependent ◽  
Current Status ◽  
Radial Pulsation ◽  
Major Difficulty ◽  
Critical Attitude ◽  
Quantitative Results

AbstractO stars are located in a domain of the HRD where nonradial pulsations are expected. Photometric surveys did not reveal pulsating O stars, showing that the amplitudes must be very small. Intensive spectroscopic studies yielded pulsation modes for very few O stars only, although many are line-profile variables. Wind contamination of many spectral lines is a major difficulty. Future concentrated spectroscopic efforts will undoubtedly increase the number of pulsating O stars.The current status of our knowledge of pulsations in these stars is reviewed. From one specific example a critical attitude emerges towards the quantitative results reached so far. We also address the question whether non-radial pulsation can be the cause of the non-spherical time-dependent winds of these stars.

scholarly journals Insight into dual fluorescence effects induced by molecular aggregation occurring in membrane model systems containing 1,3,4-thiadiazole derivatives

2021 ◽  
Author(s):  
Melinda David ◽  
Iwona Budziak-Wieczorek ◽  
Dariusz Karcz ◽  
Monica Florescu ◽  
Arkadiusz Matwijczuk
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Electrochemical Impedance ◽  
Spectroscopic Studies ◽  
Intramolecular Proton Transfer ◽  
Model Systems ◽  
Molecular Forms ◽  
Dual Fluorescence ◽  
Thiadiazole Derivatives ◽  
Lipid Environment

AbstractThis work reports on biophysical insights into the excited state intramolecular proton transfer (ESIPT) processes taking place in three 1,3,4-thiadiazole derivatives that served as model compounds, on which electronic absorption, fluorescence, Fourier-transform infrared spectroscopy (FTIR), surface plasmon resonance (SPR) and electrochemical impedance spectroscopy (EIS) studies were performed. The fluorescence spectra recorded in various solvents revealed an interesting dual fluorescence effect. In molecules in their monomeric form, the effect is associated with the ESIPT phenomenon, and may be further enhanced by aggregation-related effects, such as aggregation-induced emissions. Other spectroscopic studies on the selected molecules in a liposomal medium as a model revealed that, in a biomimetic environment, they can exist in both monomeric and aggregated forms. In both cases, however, the effects observed are closely related to the lipid’s main phase transition temperature and the structure of the molecule. Introduction of specific substituents to the phenyl moiety either allows or prevents proton transfer from occurring in the excited state. The hydrophobicity changes in a lipid environment may result in an emergence of specific molecular forms and therefore either facilitate or hinder ESIPT processes. SPR and EIS confirmed the significant hydrophobicity changes in the model lipid systems, while FTIR measurements revealed a notable influence of 1,3,4-thiadiazoles on the fluidity of liposomal membranes. The results obtained clearly show that the thiadiazole derivatives are very good model molecules for studying hydrophobic-hydrophilic environments, and particularly with polymers or liposomes used as drug delivery systems.

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