Effect of Humic Substances on Americium (III) Retention onto Silica

1988 ◽  
Vol 127 ◽  
Author(s):  
Valerie Moulin ◽  
Denise Stammose
Keyword(s):  
Ionic Strength ◽  
Humic Substances ◽  
Safety Assessment ◽  
Natural Waters ◽  
Major Influence ◽  
Liquid Interfaces ◽  
Aquifer Systems ◽  
Humic Materials ◽  
Solid Liquid ◽  
Influence Of Ph

ABSTRACTThe migration/retention phenomena of radionuclides in geological systems are of great interest for the safety assessment of a nuclear disposal. Interactions at solid/liquid interfaces play a significant role in the speculation and transport of radionuclides in aquifer systems. Oxide surfaces and humic substances which occur in natural waters in large concentration ranges (from few mg/1 to several hundred mg/1) may have a major influence on radionuclides behaviour. For this purpose, studies have been carried out on a ternary system: oxide-humic substances-americium (III). The influence of pH, ionic strength and humic concentration on the adsorption of americium onto silica has been investigated. The ionic strength of the solution (0.1 and 0.01) has little effect on the americium adsorption. In the presence of humic materials, the fixation of americium is enhanced at low pH (pH<5) whereas, at higher pH (pH>5), the adsorption is lowered and dependent of humic concentration.

Influence of pH and ionic strength on the thermal gelation behaviour of pea protein

2021 ◽  
pp. 106903
Author(s):  
Caren Tanger ◽  
Michaela Müller ◽  
David Andlinger ◽  
Ulrich Kulozik
Keyword(s):  
Ionic Strength ◽  
Pea Protein ◽  
Thermal Gelation ◽  
Influence Of Ph

scholarly journals Constructing Large 2D Lattices Out of DNA-Tiles

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1502
Author(s):  
Johannes M. Parikka ◽  
Karolina Sokołowska ◽  
Nemanja Markešević ◽  
J. Jussi Toppari
Keyword(s):  
Self Assembly ◽  
Dna Nanotechnology ◽  
Building Blocks ◽  
High Yield ◽  
Dna Nanostructures ◽  
Liquid Interfaces ◽  
Basic Principles ◽  
Dna Tiles ◽  
One Step ◽  
Solid Liquid

The predictable nature of deoxyribonucleic acid (DNA) interactions enables assembly of DNA into almost any arbitrary shape with programmable features of nanometer precision. The recent progress of DNA nanotechnology has allowed production of an even wider gamut of possible shapes with high-yield and error-free assembly processes. Most of these structures are, however, limited in size to a nanometer scale. To overcome this limitation, a plethora of studies has been carried out to form larger structures using DNA assemblies as building blocks or tiles. Therefore, DNA tiles have become one of the most widely used building blocks for engineering large, intricate structures with nanometer precision. To create even larger assemblies with highly organized patterns, scientists have developed a variety of structural design principles and assembly methods. This review first summarizes currently available DNA tile toolboxes and the basic principles of lattice formation and hierarchical self-assembly using DNA tiles. Special emphasis is given to the forces involved in the assembly process in liquid-liquid and at solid-liquid interfaces, and how to master them to reach the optimum balance between the involved interactions for successful self-assembly. In addition, we focus on the recent approaches that have shown great potential for the controlled immobilization and positioning of DNA nanostructures on different surfaces. The ability to position DNA objects in a controllable manner on technologically relevant surfaces is one step forward towards the integration of DNA-based materials into nanoelectronic and sensor devices.

Swollen micelles and alcohol–surfactant co-adsorption: structures and mechanisms from liquid- and solid-state 1H–1H NMR spectroscopy

2017 ◽  
Vol 19 (11) ◽  
pp. 7708-7713 ◽  
Author(s):  
Christian Totland ◽  
Anne Marit Blokhus
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Co Adsorption ◽  
Phase Behaviour ◽  
Liquid Interfaces ◽  
Adsorption Behaviour ◽  
Mixtures Of Surfactants ◽  
Solid Liquid

Mixtures of surfactants and medium-chained alcohols display an anomalous phase behaviour, with the formation of swollen micelles in mid-range surfactant concentrations. Such alcohols also affect the aggregation and adsorption behaviour of surfactants at solid–liquid interfaces.

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