Alkali cation transport by proton-ionizable macrocycles in a H2O–CH2Cl2–H2O bulk liquid membrane system

1985 ◽  
pp. 1676-1677 ◽  
Author(s):  
Reed M. Izatt ◽  
Gypzy C. Lindh ◽  
Glen A. Clark ◽  
Jerald S. Bradshaw ◽  
Yohji Nakatsuji ◽  
...  
Keyword(s):  
Liquid Membrane ◽  
Membrane System ◽  
Cation Transport ◽  
Alkali Cation ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane

New bulk liquid membrane oscillator composed of two coupled oscillators with diffusion-mediated physical coupling

2015 ◽  
Vol 69 (9) ◽  
Author(s):  
Maria Szpakowska ◽  
Elżbieta Płocharska-Jankowska ◽  
Ottó B. Nagy
Keyword(s):  
Mass Transfer ◽  
Intercellular Communication ◽  
Coupled Oscillators ◽  
Liquid Membrane ◽  
Membrane System ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
New Type ◽  
Membrane Oscillator ◽  
Acceptor Phase

AbstractA new type of bulk liquid membrane system, which represents the first example of a bulk liquid membrane oscillator characterised by the presence of two coupled oscillators, is described. When the benzyldimethyltetradecylammonium chloride surfactant undergoes an oscillatory mass transfer through a nitromethane liquid membrane, a new liquid layer (phase X) appears between the membrane and the acceptor phase. Kinetic analysis provides evidence that the whole system is composed of two coupled oscillators with diffusion-mediated physical coupling. The first component oscillator (based on nitromethane) of lower frequency delivers the driving material to the second one (phase X-based oscillator) leading to additional higher frequency oscillations. A new molecular mechanism is proposed for interpreting the experimental observations. The results might enhance understanding of intercellular communication in biology, where periodic signalling is more efficient than any other type of signalling mode.

scholarly journals Extraction and Transport of Amino Acids Using Kryptofix 5 as Carrier through Liquid Membrane

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Pankaj Raizada ◽  
Uma Sharma
Keyword(s):  
Amino Acids ◽  
Liquid Membrane ◽  
High Surface ◽  
High Surface Area ◽  
Membrane System ◽  
Extraction Process ◽  
Bulk Liquid ◽  
Bulk Liquid Membrane ◽  
Aromatic Donor ◽  
Egg Shell

The present work explores membrane-mediated extraction and transport studies of amino acids through artificial bulk liquid membrane system with kryptofix 5 as a carrier. The various reaction parameters such as amino acid concentration, carrier concentration, time, pH, and stirring effect were studied to optimize reaction conditions. The stirring of source and receiving phases increased the efficiency of extraction process. Noncyclic receptor kryptofix 5 with five oxyethylene units and terminal aromatic donor end groups governs its transport and extraction efficiency. The extraction and transport efficiency followed the following trend: valine > alanine > glycine > threonine. Supported liquid membrane (SLM) studies were performed using cellulose nitrate, PTFE, eggshell, and onion membranes. The egg shell membrane support proved to be most efficient due to intricate network of water insoluble proteins fibers with very high surface area and homogeneity.

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