Formation, Absorption Spectrum, and Chemical Reactions of Nanosized Colloidal Cobalt in Aqueous Solution

2000 ◽  
Vol 104 (26) ◽  
pp. 6138-6142 ◽  
Author(s):  
B. G. Ershov ◽  
N. L. Sukhov ◽  
E. Janata
Keyword(s):  
Aqueous Solution ◽  
Absorption Spectrum ◽  
Chemical Reactions

Absorption Spectrum and Chemical Reactions of Colloidal Cadmium in Aqueous Solution

1992 ◽  
Vol 272 ◽  
Author(s):  
M. Gutiérrez ◽  
A. Henglein
Keyword(s):  
Aqueous Solution ◽  
Nitrous Oxide ◽  
Absorption Spectrum ◽  
Carbon Tetrachloride ◽  
Chemical Reactions ◽  
Redox Reactions ◽  
Methyl Viologen ◽  
Narrow Band ◽  
Optical Data

ABSTRACTA radiolysis method is described to prepare isolated cadmium particles in aqueous solution. The spectrum of these particles (narrow band at 260nm) agrees with the spectrum calculated from the optical data of cadmium. Clusters of particles absorb at longer wavelengths. Redox reactions of the particles with methyl viologen, nitrous oxide and carbon tetrachloride were also investigated. It is shown that the absorption spectrum of the particles changes during these reactions as de-clustering takes place.

Absorption spectrum and chemical reactions of colloidal cadmium in aqueous solution

1992 ◽  
Vol 96 (11) ◽  
pp. 4598-4602 ◽  
Author(s):  
A. Henglein ◽  
M. Gutierrez ◽  
E. Janata ◽  
B. G. Ershov
Keyword(s):  
Aqueous Solution ◽  
Absorption Spectrum ◽  
Chemical Reactions

A novel route for aspartame production by combining enzymatic and chemical reactions for industrial use

2020 ◽  
Vol 85 (2) ◽  
pp. 464-466
Author(s):  
Kenzo Yokozeki ◽  
Isao Abe
Keyword(s):  
Aqueous Solution ◽  
Amino Acid ◽  
Chemical Reactions ◽  
Acid Ester ◽  
Amino Acid Ester ◽  
Acyl Transferase ◽  
Enzymatic Production ◽  
Production Route ◽  
Industrial Use ◽  
Hcl Removal

ABSTRACT Here, we report a novel industrial aspartame production route, involving the enzymatic production of α-l-aspartyl-l-phenylalanine β-methylester from l-aspartic acid dimethylester and l-phenylalanine by α-amino acid ester acyl transferase. The route also involves the chemical transformation of α-l-aspartyl-l-phenylalanine β-methylester to α-l-aspartyl-l-phenylalanine methylester hydrochloride (aspartame hydrochloride) in an aqueous solution with methanol and HCl, followed by HCl removal to form aspartame.

scholarly journals Calculations of Physical and Chemical Reactions with DNA in Aqueous Solution from Auger Cascades

1990 ◽  
Vol 31 (1-4) ◽  
pp. 59-62 ◽  
Author(s):  
H.A. Wright ◽  
R.N. Hamm ◽  
J.E. Turner ◽  
R.W. Howell ◽  
D.V. Rao ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Chemical Reactions ◽  
Physical And Chemical

Atomic absorption background of Ba in EXAFS analysis of BaFe12O19nanoparticles

2011 ◽  
Vol 18 (4) ◽  
pp. 557-563 ◽  
Author(s):  
Jana Padežnik Gomilšek ◽  
Alojz Kodre ◽  
Iztok Arčon ◽  
Simone de Panfilis ◽  
Darko Makovec
Keyword(s):  
Aqueous Solution ◽  
Absorption Spectrum ◽  
Atomic Absorption ◽  
Energy Region ◽  
Structural Parameters ◽  
Simple Analytical Model ◽  
Absorption Signal ◽  
X Ray ◽  
Exafs Analysis ◽  
Atomic Absorption Spectra

The approximate barium X-ray atomic absorption in the energy region ofL-edges is reconstructed from the absorption spectrum of an aqueous solution of BaCl2. The result is corroborated by comparison with pure atomic absorption spectra of neighbour elements Xe and Cs. The application of the atomic absorption signal as a proper EXAFS background is demonstrated and discussed in the analysis of Ba hexaferrite nanoparticles with a very weak structural signal. The essential gain is found in the decrease of uncertainty intervals of structural parameters and their correlations. A simple analytical model of the absorption background for the practical EXAFS analysis is demonstrated.

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