A General DNA-Gated Hydrogel Strategy for Selective Transport of Chemical and Biological Cargos

Abstract High levels of urea and creatinine in the blood are a sign of decreased kidney function. To remove these substances from the blood, hemodialysis which utilizes membranes could be used. In this study, a molecularly imprinted membrane (MIM) was synthesized for the selective transport of urea. The synthesis is initiated with the polymerization of eugenol into polyeugenol and then into polyeugenoxy acetate (PA). The PA is then contacted with urea and then used as the functional polymer in the synthesis of MIM with polysulfone as the membrane base, and polyethylene glycol as the cross-linking agent. The result was later analyzed with FTIR and SEM-EDX. The membrane is then used in the transport of urea, creatinine, and vitamin B12 and then compared with the non-imprinted membrane (NIM) performance. By using UV-Vis spectrophotometry, the results showed that the membrane with 10 h heating variation is able to transport more urea and is more selective than NIM; this proves that the urea template on the MIM enables it to recognize urea molecules better than creatinine and vitamin B12. The order of transport from the best results is urea > creatinine > vitamin B12.

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An Ion Transport Switch Based on Light-Responsive Conformation-Dependent G-Quadruplex Transmembrane Channels

Chemical Communications ◽

10.1039/d1cc03273a ◽

2021 ◽

Author(s):

Chunying Li ◽

Hui Chen ◽

Xiaohai Yang ◽

Kemin Wang ◽

Jianbo Liu

Keyword(s):

Ion Transport ◽

Selective Transport ◽

G Quadruplex ◽

Transmembrane Channels

A light-responsive ion transport switch has been developed based on conformation-dependent azobenzene-incorporated lipophilic G-quadruplex channels, which provides a new smart approach for the selective transport of K+ ions across the...

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Selective Transport of Airborne Microparticles Through Micro-channels Under Microgravity

Microgravity Science and Technology ◽

10.1007/s12217-020-09855-3 ◽

2021 ◽

Vol 33 (1) ◽

Author(s):

Monia Makhoul ◽

Philippe Beltrame

Keyword(s):

Numerical Simulation ◽

Fluid Flow ◽

Bifurcation Analysis ◽

Metal Particles ◽

Microgravity Environment ◽

Ratchet Effect ◽

Selective Transport ◽

Microgravity Experiments ◽

Particle Drift ◽

Micro Channels

AbstractThis paper analyzes the possibility of obtaining the selective transport of microparticles suspended in air in a microgravity environment through modulated channels without net displacement of air. Using numerical simulation and bifurcation analysis tools, we show the existence of intermittent particle drift under the Stokes assumption of the fluid flow. The particle transport can be selective and the direction of transport is controlled only by the kind of pumping used. The selective transport is interpreted as a deterministic ratchet effect due to spatial variations in the flow and the particle drag. This ratchet phenomenon could be applied to the selective transport of metal particles during the short duration of microgravity experiments.

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(Invited) New Functionalized Imidazolium-Based Room-Temperature Ionic Liquids and Composite Materials for Gas Separation and Selective Transport Applications

ECS Transactions ◽

10.1149/1.3484758 ◽

2019 ◽

Vol 33 (7) ◽

pp. 21-34 ◽

Cited By ~ 2

Author(s):

Douglas Gin ◽

Richard Noble ◽

Trevor Carlisle ◽

Bret Voss ◽

Jason Bara ◽

...

Keyword(s):

Ionic Liquids ◽

Composite Materials ◽

Gas Separation ◽

Room Temperature ◽

Room Temperature Ionic Liquids ◽

Selective Transport

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Characterization of the porous nature of a phthalocyanine derivative with axial ligation designed to prevent aggregation

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424610002173 ◽

2010 ◽

Vol 14 (05) ◽

pp. 389-396

Author(s):

Carl A. Barker ◽

Alan Massey ◽

Aidan Rhodes ◽

Martin R. Bryce ◽

Ritu Kataky

Keyword(s):

Force Microscopy ◽

Selective Transport ◽

Electrode Surfaces ◽

Axial Ligation ◽

Nanoporous Films ◽

Atom Force Microscopy ◽

Solvent Cast ◽

Complementary Techniques

Judiciously designed phthalocyanines (Pcs), such as silicon-Pc bis(3,5-diphenyl)benzoate (1c), with axial substituents which prevent aggregation, can self-assemble to form ordered nanoporous films on electrode surfaces. In this paper, complementary techniques such as Scanning Kelvin Nanoprobe (SKN) microscopy, Atom Force Microscopy (AFM) and electrochemical measurements are used to demonstrate that films formed by silicon-Pc bis(3,5-diphenyl)benzoate allow size- and charge- selective transport of probe molecules through well-defined intermolecular cavities. In contrast, the analogs silicon-Pc bis(4-tert-butylbenzoate) (1a) and silicon-Pc bis(3-thienyl)acetate (1b) have different film morphologies when solvent-cast in the same manner and block the electrode surface. The role of the different axial substituents in orienting the molecules on the substrate is discussed.

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