Ionic Mixed Interactions and Hofmeister Effects

Ciferri, A.

doi:10.1002/9781118165850.ch6

Cited by 8 publications

(12 citation statements)

References 120 publications

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“…Although it is generally known that ion exchange membrane is more robust and stable than RO membrane35, it is still challenging to minimize fouling/scaling on the membrane surface. Negatively charged organic foulants (especially natural organic matter with a larger molecular weight) in many effluent and seawater foul AEMs up more significantly than CEMs.…”

Section: Resultsmentioning

confidence: 99%

“…Negatively charged organic foulants (especially natural organic matter with a larger molecular weight) in many effluent and seawater foul AEMs up more significantly than CEMs. increasing the resistance of the membrane and inhibiting ion transport353637. Scale formation (calcium deposits) in electrodialysis is also another challenge, originating from the pH shift adjacent to the membrane35, caused by water splitting (producing H + and OH − ), and often exacerbated by high current density, ( i.e.…”

Section: Resultsmentioning

confidence: 99%

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Purification of High Salinity Brine by Multi-Stage Ion Concentration Polarization Desalination

Kim

Kwak

Kwon

et al. 2016

Sci Rep

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There is an increasing need for the desalination of high concentration brine (>TDS 35,000 ppm) efficiently and economically, either for the treatment of produced water from shale gas/oil development, or minimizing the environmental impact of brine from existing desalination plants. Yet, reverse osmosis (RO), which is the most widely used for desalination currently, is not practical for brine desalination. This paper demonstrates technical and economic feasibility of ICP (Ion Concentration Polarization) electrical desalination for the high saline water treatment, by adopting multi-stage operation with better energy efficiency. Optimized multi-staging configurations, dependent on the brine salinity values, can be designed based on experimental and numerical analysis. Such an optimization aims at achieving not just the energy efficiency but also (membrane) area efficiency, lowering the true cost of brine treatment. ICP electrical desalination is shown here to treat brine salinity up to 100,000 ppm of Total Dissolved Solids (TDS) with flexible salt rejection rate up to 70% which is promising in a various application treating brine waste. We also demonstrate that ICP desalination has advantage of removing both salts and diverse suspended solids simultaneously, and less susceptibility to membrane fouling/scaling, which is a significant challenge in the membrane processes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Purification of High Salinity Brine by Multi-Stage Ion Concentration Polarization Desalination

Kim

Kwak

Kwon

et al. 2016

Sci Rep

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“…(B) Ionic interactions. In addition to the conventional electrostatic interaction between fixed and mobile charges, "ion condensation" effects promote an attractive parallelization of rigid chains sharing bivalent counter-ions [13][14][15].…”

Section: Chemical Recognitionmentioning

confidence: 99%

Supramolecular and Liquid Crystalline Contributions to the Assembly of Myofibril

Ciferri

Crumbliss

2020

Molecules

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We compare steps observed during the fibrillogenesis of myofibrils with the sequence of steps predictable by a recent analysis of the structurization and functioning of striated muscles. The predicted assembly steps are based solely on fundamental equilibrium processes, particularly supramolecular interactions and liquid crystalline alignment of the rigid thick and thin filaments hosted within the sarcomer. Satisfactory agreement is obtained between several of the observed and the predicted fibrillogenesis steps. In several cases, however, the actual steps appear to be more complex than expected, evidencing the occurrence of transport and kinetic pathways that may assist the attainment of the equilibrium structure. The memory of the order of a precursor mesophase is imprinted during the remodeling of the surfaces at which the two sets of filaments are anchored. The relevance of the present analysis to the functioning of the myofibril is considered.

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“…A similar conclusion is obtained from the sequence studies for tropomiosin (Stone and Smillie, 1978 ) and troponin (Pearstone et al, 1976 ) (that bind to actin), and titin (Maruyama et al, 1981 ) (that binds to myosin). These studies reveal that the sarcomeric polymers are all weak polyanions, and therefore programmed to be mutually repulsive unless the fixed anionic charges are connected by the hypothetical “salt bridge,” as claimed by the sliding filament model, or screened by interaction with mobile ions (Manning, 1978 ; Yang and Janmey, 1996 ; Xian et al, 1999 ; Ciferri and Perico, 2010 ; Ciferri, 2012a ; Crumbliss and Parker Siburt, 2012 ; Maglio et al, 2012 ). The latter possibility has not been previously considered, but should not be neglected.…”

Section: Analysis Of Self-assembling Contributionsmentioning

confidence: 99%

“…The latter possibility has not been previously considered, but should not be neglected. In fact, even though the Debye screening length is rather small in a 10 −5 M solution of a conventional electrolyte, calcium ions have a specific binding power that greatly reinforces the simple Debye screening (Ciferri and Perico, 2010 ; Ciferri, 2012a ; Maglio et al, 2012 ). It should moreover be remarked that current polyelectrolyte theory predicts the occurrence of “condensed” bivalent cations that are free to diffuse along the chain axis but unable to diffuse away (Manning, 1978 ; Yang and Janmey, 1996 ; Xian et al, 1999 ).…”

Section: Analysis Of Self-assembling Contributionsmentioning

confidence: 99%

The Assembling and Contraction Mechanisms of Striated Muscles

Ciferri

Crumbliss

2018

Front. Chem.

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A novel approach to the description of the assembly mechanism of functional biological structures is presented. The approach is based on the identification of fundamental self-assembling processes to which an additional structurization “engineered” by Nature to optimize functions is superimposed. Application of the approach to the structure and contraction of the striated muscle evidences a key role of the residual liquid crystallinity of a constrained structure and the alteration of the compatibility between the thin and thick filaments driven by ionic interactions. ATP hydrolysis boosts the relaxation process. A strong protein scaffold, engineered during the evolutionary process and based on the selective anchoring of coordinated filaments, directs a demixing tendency of the two filaments toward a sliding motion along the fiber axis. The Huxley-Hanson sliding filament hypothesis aimed to explain the contraction-relaxation function of the striated muscle, but does not offer any clue on the overall assembling mechanism of the myofibril.

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Ionic Mixed Interactions and Hofmeister Effects

Cited by 8 publications

References 120 publications

Purification of High Salinity Brine by Multi-Stage Ion Concentration Polarization Desalination

Purification of High Salinity Brine by Multi-Stage Ion Concentration Polarization Desalination

Supramolecular and Liquid Crystalline Contributions to the Assembly of Myofibril

The Assembling and Contraction Mechanisms of Striated Muscles

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