Diffusion of Electrolytes and Non-electrolytes in Aqueous Solutions: A Useful Strategy for Structural Interpretation of Chemical Systems

2013 ◽  
pp. 53-66
Keyword(s):  
Aqueous Solutions ◽  
Structural Interpretation ◽  
Chemical Systems

scholarly journals Structural interpretation of the energetic performances of a pure silica LTA-type zeolite

2020 ◽  
Vol 22 (9) ◽  
pp. 5178-5187 ◽  
Author(s):  
Giorgia Confalonieri ◽  
Andrey Ryzhikov ◽  
Rossella Arletti ◽  
Simona Quartieri ◽  
Giovanna Vezzalini ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Aqueous Solutions ◽  
Extrusion Process ◽  
Structural Interpretation ◽  
Pure Silica ◽  
Lta Zeolite ◽  
Type Zeolite ◽  
Zeolite P

The intrusion–extrusion process of various electrolyte aqueous solutions in a hydrophobic pure-silica LTA zeolite was investigated for energetic purposes by means of in situ HP XRPD, porosimeter tests, thermogravimetric analysis and NMR spectroscopy.

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.

Thermodynamics of Chemical Systems

1990 ◽  
Author(s):  
Scott Emerson Wood ◽  
Rubin Battino
Keyword(s):  
Chemical Systems
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