Dielectric study on chain dynamics of poly(glutamic acid) in aqueous solution using the frequency range 107-1010 Hz

1989 ◽  
Vol 22 (3) ◽  
pp. 1285-1288 ◽  
Author(s):  
Satoru Mashimo ◽  
Tsuneo Ota ◽  
Naoki Shinyashiki ◽  
Shinichi Tanaka ◽  
Shin Yagihara
1993 ◽  
Vol 26 (25) ◽  
pp. 6859-6863 ◽  
Author(s):  
Satoru Mashimo ◽  
Nobuhiro Miura ◽  
Naoki Shinyashiki ◽  
Tsuneo Ota

InterConf ◽  
2021 ◽  
pp. 970-978
Author(s):  
Z. Nizomov ◽  
M. Asozoda ◽  
A. Olimi ◽  
A. Karimzoda

The absorption of ultrasonic waves in the frequency range from 6 to 146 MHz in aqueous solutions of sodium acetate, sodium chloride and calcium has been studied. It was found that only in solutions of calcium cations and acetate anion present simultaneously, relaxation absorption of ultrasonic waves is observed. The experimental data obtained indicate that the observed relaxation absorption of ultrasound in the studied frequency range by an aqueous solution of calcium acetate is associated with the interaction of the acetate anion with the calcium cation in the solution.


2008 ◽  
Vol 116 (1-3) ◽  
pp. 445-451 ◽  
Author(s):  
María D. Gutiérrez-Valero ◽  
Paloma Arranz-Mascarós ◽  
M. Luz Godino-Salido ◽  
María D. López-León ◽  
Rafael López-Garzón ◽  
...  

2014 ◽  
Vol 13 (1) ◽  
Author(s):  
Romualda Bregier-Jarzebowska

AbstractThe interactions between L-glutamic acid (Glu) and 1,7-diamino-4-azaheptan (3,3-tri) and 1,8-diamino-4-azaoktan (Spd) in metal-free systems and in the appropriate Cu(II) ions complexes were studied by potentiometric and spectral methods. The composition and overall stability constants of complexes forming in the systems studied were determined and the reactions centres were identified. In the complex formation conditions, the ligands have positive and negative reaction centres, which are also the potential sites of metal coordination. Below pH 7 in metal-free systems, the terminal amine groups from both triamines and the oxygen atoms from –C


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