The influence of pressure on electrolytic conduction in alkali silicate glasses

1965 ◽  
Vol 18 (1) ◽  
pp. 1 ◽  
Author(s):  
SD Hamann
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Potassium Silicate ◽  
Silicate Glasses ◽  
Alkali Metal Ions ◽  
Conduction Process ◽  
Alkali Silicate ◽  
Sodium And Potassium

This paper reports measurements of the electrical resistances of some lithium, sodium, and potassium silicate glasses between 1 and 2000 atm and from 15 to 35�C. The resistances of all the glasses increased with increasing pressure, and the change was greatest for the potassium glass. The apparent volumes of activation for the conduction process were found to be slightly greater than the volumes of the alkali metal ions that carried the current.

scholarly journals Low-generation dendrimers with a calixarene core and based on a chiral C 2-symmetric pyrrolidine as iminosugar mimics

2012 ◽  
Vol 8 ◽  
pp. 951-957 ◽  
Author(s):  
Marco Marradi ◽  
Stefano Cicchi ◽  
Francesco Sansone ◽  
Alessandro Casnati ◽  
Andrea Goti
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Alkali Metal Ions ◽  
Biologically Relevant ◽  
Reduced Volume ◽  
Sodium And Potassium ◽  
Rapid Incorporation

The preparation of low-generation dendrimers based on a simple calix[4]arene scaffold by insertion of the iminosugar-analogue C 2-symmetric 3,4-dihydroxypyrrolidine is described. This methodology allows a rapid incorporation of a considerable number of iminosugar-like moieties in a reduced volume and in a well-defined geometry. The inclusion of alkali-metal ions (sodium and potassium) in the polar cavity defined by the acetamide moieties at the lower rim of the calixarene was demonstrated, which allows also the rigidification of the dendrimer structure and the iminosugar presentation in the clusters. The combination of the supramolecular properties of calixarenes with the advantage of a dendrimeric presentation of repetitive units opens up the possibility of generating well-defined multivalent and multifaceted systems with more complex and/or biologically relevant iminosugars.

Ion–peptide interactions between alkali metal ions and a termini-protected dipeptide: modeling a portion of the selectivity filter in K+ channels

2019 ◽  
Vol 21 (2) ◽  
pp. 561-571 ◽  
Author(s):  
Shun-ichi Ishiuchi ◽  
Yuta Sasaki ◽  
James M. Lisy ◽  
Masaaki Fujii
Keyword(s):  
Alkali Metal ◽  
Metal Ions ◽  
Selectivity Filter ◽  
Alkali Metal Ions ◽  
K Channels ◽  
Peptide Interactions

Differentiating K+ and Na+ binding patterns in peptide sequences.

Sign in / Sign up

Export Citation Format

Share Document