Photophysical and photochemical properties of the pharmaceutical compound salbutamol in aqueous solutions

Chemosphere ◽  
2011 ◽  
Vol 83 (11) ◽  
pp. 1513-1523 ◽  
Author(s):  
Leah G. Dodson ◽  
R. Aaron Vogt ◽  
Joyann Marks ◽  
Christian Reichardt ◽  
Carlos E. Crespo-Hernández
Keyword(s):  
Aqueous Solutions ◽  
Pharmaceutical Compound ◽  
Photochemical Properties

scholarly journals Chemical and photochemical properties of chloroharmine derivatives in aqueous solutions

2016 ◽  
Vol 18 (2) ◽  
pp. 886-900 ◽  
Author(s):  
Federico A. O. Rasse-Suriani ◽  
M. Paula Denofrio ◽  
Juan G. Yañuk ◽  
M. Micaela Gonzalez ◽  
Ezequiel Wolcan ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Reaction Pathways ◽  
Photochemical Properties

In water, chloroharmines follow very distinctive thermal and photochemical pH- and O2-dependent-reaction pathways.

Determination of photoredox properties of individual kinetically labile complexes in equilibrium systems

2011 ◽  
Vol 65 (5) ◽  
Author(s):  
František Šimo ◽  
Jozef Šima
Keyword(s):  
Quantum Yield ◽  
Aqueous Solutions ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Individual Species ◽  
Yield Values ◽  
Photochemical Properties ◽  
Species Being

AbstractThe paper evaluates the possibilities and limitations in characterising photochemical properties of individual kinetically labile species being in mutual equilibrium. A model of calculating quantum yield values is elaborated and applied to azidokojic iron(III) complexes in aqueous solutions. Based on the known speciation of the complexes as a function of pH, Fe(III) and azidokojic acid concentrations, electronic absorption spectra of individual species, and the determined overall quantum yield of Fe(II) photoformation at irradiation with monochromatised radiation at 366 nm, the quantum yield of Fe(III) to Fe(II) photoreduction was obtained for each of the complexes present in the investigated systems.

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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