Water concentration dependent photochemistry of ketoprofen in aqueous solutions

2010 ◽  
Vol 12 (18) ◽  
pp. 4800 ◽  
Author(s):  
Ming-De Li ◽  
Yong Du ◽  
Yung Ping Chuang ◽  
Jiadan Xue ◽  
David Lee Phillips
Keyword(s):  
Aqueous Solutions ◽  
Water Concentration

Vapour pressures of aqueous solutions of (Ag, Tl, Cd)NO3 at 98.5 °C. I. Brunauer–Emmett–Teller isotherms

1978 ◽  
Vol 56 (3) ◽  
pp. 348-351 ◽  
Author(s):  
James Malcolm Sangster ◽  
Marie-Christine Abraham ◽  
Maurice Abraham
Keyword(s):  
Aqueous Solutions ◽  
Water Concentration ◽  
Raoult’S Law ◽  
Crossover Point ◽  
Additivity Rules ◽  
Static Technique ◽  
Bet Equation ◽  
Raoult's Law

Vapour pressures of aqueous solutions of the mixed melt AgNO3 + TlNO3 + Cd(NO3)2 have been measured at 98.5 °C by the static technique. The Ag/Tl mole ratio was fixed at 1.06, and the mole fractions Cd/(Ag + Tl + Cd) of Cd in the melt were 0, 0.05, 0.075, 0.10, and 0.125. Adapted BET isotherms and their constants were obtained for each of the five melt mixtures. It has been shown, in the present study, from the BET equation itself, and verified experimentally, that certain Systems can give rise to a 'crossover point', that is, a reversal of sign of the deviation from Raoult's law. The BET constants of the systems conform to simple additivity rules. The water concentration range over which the BET equation is valid is unexpectedly wide.

scholarly journals Water Concentration Dependent Photochemistry of Ketoprofen in Neutral Aqueous Solutions

2010 ◽  
Author(s):  
Ming-De Li ◽  
Yong Du ◽  
Jiadan Xue ◽  
David Lee Phillips ◽  
P. M. Champion ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Water Concentration

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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