Dynamic Evolving Two-Component Supramolecular Gels—Hierarchical Control over Component Selection in Complex Mixtures

2013 ◽  
Vol 135 (15) ◽  
pp. 5911-5920 ◽  
Author(s):  
William Edwards ◽  
David K. Smith
Keyword(s):  
Hierarchical Control ◽  
Complex Mixtures ◽  
Component Selection ◽  
Two Component ◽  
Supramolecular Gels

scholarly journals Annealing multicomponent supramolecular gels

Nanoscale ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 3275-3280 ◽  
Author(s):  
Ana M. Fuentes-Caparrós ◽  
Francisco de Paula Gómez-Franco ◽  
Bart Dietrich ◽  
Claire Wilson ◽  
Christopher Brasnett ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Supramolecular Gel ◽  
Two Component ◽  
Supramolecular Gels

Annealing in a two-component supramolecular gel leads to a self-sorted network, which has significantly different mechanical properties to the as-prepared gels.

Two-Component Supramolecular Gels Derived from Amphiphilic Shape-Persistent Cyclo[6]aramides for Specific Recognition of Native Arginine

2014 ◽  
Vol 53 (44) ◽  
pp. 11834-11839 ◽  
Author(s):  
Youzhou He ◽  
Min Xu ◽  
Rongzhao Gao ◽  
Xiaowei Li ◽  
Fengxue Li ◽  
...  
Keyword(s):  
Specific Recognition ◽  
Two Component ◽  
Supramolecular Gels

Selective shrinkage and separation of isomeric naphthoic acids via supramolecular gelation

2016 ◽  
Vol 52 (75) ◽  
pp. 11277-11280 ◽  
Author(s):  
Jie Chen ◽  
Tianyu Wang ◽  
Minghua Liu
Keyword(s):  
Room Temperature ◽  
Naphthoic Acid ◽  
Two Component ◽  
Supramolecular Gels

The isomeric non-gelator molecules 1- or 2-naphthoic acid (NA1, or NA2) were found to form two-component supramolecular gels with an amphiphilic gelator LHC18, and the NA2/LHC18 gel underwent shrinking at room temperature.

Self-Assembly of Two-Component Gels: Stoichiometric Control and Component Selection

2008 ◽  
Vol 15 (2) ◽  
pp. 372-379 ◽  
Author(s):  
Andrew R. Hirst ◽  
Juan F. Miravet ◽  
Beatriu Escuder ◽  
Laurence Noirez ◽  
Valeria Castelletto ◽  
...  
Keyword(s):  
Self Assembly ◽  
Component Selection ◽  
Two Component

scholarly journals Hierarchical Control of Anaerobic Gene Expression in Escherichia coli K-12: the Nitrate-Responsive NarX-NarL Regulatory System Represses Synthesis of the Fumarate-Responsive DcuS-DcuR Regulatory System

2005 ◽  
Vol 187 (14) ◽  
pp. 4890-4899 ◽  
Author(s):  
Ee-Been Goh ◽  
Peggy J. Bledsoe ◽  
Li-Ling Chen ◽  
Prasad Gyaneshwar ◽  
Valley Stewart ◽  
...  
Keyword(s):  
Promoter Activity ◽  
Hierarchical Control ◽  
Regulatory System ◽  
Nitrate Respiration ◽  
Two Component System ◽  
Respiratory Enzymes ◽  
Component System ◽  
Standard Redox Potential ◽  
Two Component ◽  
K 12

ABSTRACT Hierarchical control ensures that facultative bacteria preferentially use the available respiratory electron acceptor with the most positive standard redox potential. Thus, nitrate is used before other electron acceptors such as fumarate for anaerobic respiration. Nitrate regulation is mediated by the NarX-NarL two-component system, which activates the transcription of operons encoding nitrate respiration enzymes and represses the transcription of operons for other anaerobic respiratory enzymes, including enzymes involved in fumarate respiration. These are fumarate reductase (encoded by the frdABCD operon), fumarase B, which generates fumarate from malate, and the DcuB permease for fumarate, malate, and aspartate. The transcription of the corresponding structural genes is activated by the DcuS-DcuR two-component system in response to fumarate or its dicarboxylate precursors. We report results from preliminary transcription microarray experiments that revealed two previously unknown members of the NarL regulon: the aspA gene encoding aspartate-ammonia lyase, which generates fumarate; and the dcuSR operon encoding the dicarboxylate-responsive regulatory system. We measured beta-galactosidase expression from monocopy aspA-lacZ, frdA-lacZ, and dcuS-lacZ operon fusions in response to added nitrate and fumarate and with respect to the dcuR and narL genotypes. Nitrate, acting through the NarX-NarL regulatory system, repressed the transcription of all three operons. Only frdA-lacZ expression, however, was responsive to added fumarate or a dcuR + genotype. Phospho-NarL protein protected operator sites in the aspA and dcuS promoter regions from DNase I cleavage in vitro. The overall results are consistent with the hypothesis that nitrate represses frdA operon transcription not only directly, by repressing frdA promoter activity, but also indirectly, by repressing dcuS promoter activity.

Preparation and Absorption Capacities of Two-Component Supramolecular Gels

2017 ◽  
Vol 13 (5) ◽  
Author(s):  
Shengwei Huo ◽  
Yuting Meng ◽  
Tifeng Jiao ◽  
Kai Ma ◽  
Yamei Liu ◽  
...  
Keyword(s):  
Two Component ◽  
Supramolecular Gels

Two-component organogelators: combination of Nε-alkanoyl-L-lysine with various N-alkanoyl-L-amino acids: additional level of hierarchical control

2018 ◽  
Vol 16 (4) ◽  
pp. 289-302
Author(s):  
Mehmet Çolak ◽  
Deniz Barış ◽  
Murat Evcil ◽  
Nadir Demirel ◽  
Halil Hoşgören
Keyword(s):  
Amino Acids ◽  
Hierarchical Control ◽  
Two Component ◽  
Additional Level

Two-Component Supramolecular Gels Derived from Amphiphilic Shape-Persistent Cyclo[6]aramides for Specific Recognition of Native Arginine

2014 ◽  
Vol 126 (44) ◽  
pp. 12028-12033 ◽  
Author(s):  
Youzhou He ◽  
Min Xu ◽  
Rongzhao Gao ◽  
Xiaowei Li ◽  
Fengxue Li ◽  
...  
Keyword(s):  
Specific Recognition ◽  
Two Component ◽  
Supramolecular Gels
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