Relaxation processes in 2-Butoxyethanol aqueous solutions near the critical region

1992 ◽  
Author(s):  
G. D’Arrigo ◽  
A. Paparelli
Keyword(s):  
Aqueous Solutions ◽  
Critical Region ◽  
Relaxation Processes

Ion Pairing and Solvent Relaxation Processes in Aqueous Solutions of Sodium Malonate and Sodium Succinate

2004 ◽  
Vol 108 (36) ◽  
pp. 13789-13795 ◽  
Author(s):  
Andrew Tromans ◽  
Peter M. May ◽  
Glenn Hefter ◽  
Takaaki Sato ◽  
Richard Buchner
Keyword(s):  
Aqueous Solutions ◽  
Sodium Succinate ◽  
Ion Pairing ◽  
Relaxation Processes ◽  
Solvent Relaxation ◽  
Sodium Malonate

Light Scattering Spectra of Water in Trehalose Aqueous Solutions: Evidence for Two Different Solvent Relaxation Processes

2009 ◽  
Vol 113 (22) ◽  
pp. 7874-7878 ◽  
Author(s):  
M. Paolantoni ◽  
L. Comez ◽  
M. E. Gallina ◽  
P. Sassi ◽  
F. Scarponi ◽  
...  
Keyword(s):  
Light Scattering ◽  
Aqueous Solutions ◽  
Relaxation Processes ◽  
Solvent Relaxation ◽  
Scattering Spectra

scholarly journals Time-resolved photoelectron spectroscopy of organic molecules in aqueous solutions

2019 ◽  
Vol 205 ◽  
pp. 09027
Author(s):  
Johan Hummert ◽  
Geert Reitsma ◽  
Nicola Mayer ◽  
Evgenii Ikonnikov ◽  
Martin Eckstein ◽  
...  
Keyword(s):  
Excited State ◽  
Proton Transfer ◽  
Aqueous Solutions ◽  
Photoelectron Spectroscopy ◽  
Organic Molecules ◽  
Electronic Excitation ◽  
Intramolecular Proton Transfer ◽  
Relaxation Processes ◽  
Femtosecond Pulses ◽  
Time Resolved

We use time-resolved photoelectron spectroscopy with wavelength-selected XUV femtosecond pulses to study photoinduced dynamics of organic molecules in solutions at millimolar concentrations. Upon electronic excitation we observe relaxation processes, such as excited state intramolecular proton transfer and trans-cis isomerization.

Ultrathin frozen sections of yeast without aldehyde prefixation

1978 ◽  
Vol 36 (2) ◽  
pp. 58-59
Author(s):  
K. J. Böhm ◽  
a. E. Unger
Keyword(s):  
Aqueous Solutions ◽  
Biological Material ◽  
Yeast Cells ◽  
Frozen Sections ◽  
Good Preservation ◽  
Ultrathin Frozen Sections

During the last years it was shown that also by means of cryo-ultra-microtomy a good preservation of substructural details of biological material was possible. However the specimen generally was prefixed in these cases with aldehydes.Preparing ultrathin frozen sections of chemically non-prefixed material commonly was linked up to considerable technical and manual expense and the results were not always satisfying. Furthermore, it seems to be impossible to carry out cytochemical investigations by means of treating sections of unfixed biological material with aqueous solutions.We therefore tried to overcome these difficulties by preparing yeast cells (S. cerevisiae) in the following manner:

Imaging polymers, proteins and dna in aqueous solutions with the atomic force microscope

1989 ◽  
Vol 47 ◽  
pp. 32-33
Author(s):  
S.A.C. Gould ◽  
B. Drake ◽  
C.B. Prater ◽  
A.L. Weisenhorn ◽  
S.M. Lindsay ◽  
...  
Keyword(s):  
Amino Acids ◽  
Dna Sequencing ◽  
Aqueous Solutions ◽  
Atomic Force Microscope ◽  
Piezoelectric Crystal ◽  
Atomic Force ◽  
Structure Of Molecules ◽  
Optical Lever

The atomic force microscope (AFM) is an instrument that can be used to image many samples of interest in biology and medicine. Images of polymerized amino acids, polyalanine and polyphenylalanine demonstrate the potential of the AFM for revealing the structure of molecules. Images of the protein fibrinogen which agree with TEM images demonstrate that the AFM can provide topographical data on larger molecules. Finally, images of DNA suggest the AFM may soon provide an easier and faster technique for DNA sequencing.The AFM consists of a microfabricated SiO2 triangular shaped cantilever with a diamond tip affixed at the elbow to act as a probe. The sample is mounted on a electronically driven piezoelectric crystal. It is then placed in contact with the tip and scanned. The topography of the surface causes minute deflections in the 100 μm long cantilever which are detected using an optical lever.

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