Spectroelectrochemical and AFM Studies of Doping−Undoping of Poly(3-hexylthiophene) Films in Propylene Carbonate and Aqueous Solutions of LiClO4

Langmuir ◽  
2003 ◽  
Vol 19 (6) ◽  
pp. 2318-2324 ◽  
Author(s):  
Magdalena Skompska ◽  
Artur Szkurlat ◽  
Andrzej Kowal ◽  
Marek Szklarczyk
Keyword(s):  
Aqueous Solutions ◽  
Propylene Carbonate

scholarly journals Capacitive deionization in organic solutions: case study using propylene carbonate

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5865-5870 ◽  
Author(s):  
S. Porada ◽  
G. Feng ◽  
M. E. Suss ◽  
V. Presser
Keyword(s):  
Organic Solvent ◽  
Aqueous Solutions ◽  
Propylene Carbonate ◽  
Capacitive Deionization ◽  
Organic Solutions

We present a study of the performance of capacitive deionization (CDI) when applied to electrosorption in an organic solvent, finding enhanced cell charging voltages and improved salt sorption over electrosoprtion in aqueous solutions.

The Dielectric Relaxation of Water on Addition of Ethylene Carbonate and some Related Substances

1989 ◽  
Vol 44 (1) ◽  
pp. 56-58
Author(s):  
M. Stockhausen ◽  
A. Lux
Keyword(s):  
Dielectric Properties ◽  
Aqueous Solutions ◽  
Dielectric Relaxation ◽  
Propylene Carbonate ◽  
Ethylene Carbonate ◽  
Related Substances ◽  
Hydration Model

Abstract The dynamic dielectric properties of diluted aqueous solutions of propylene carbonate, ethylene carbonate (EC). 4-butyrolactone and cyclohexanone (CH) have been measured at 20 °C. On assuming normal solute relaxation, the water relaxation can be described by two superimposed Debye type contributions, which may be interpreted in terms of a hydration model. Qualitatively, the influence on the water relaxation increases from EC to CH.

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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