Extractant mediated nano-aggregate formation in Triton X-114 aided cloud formation: structural insights from TEM and SANS studies

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 95613-95617 ◽  
Author(s):  
N. Kumari ◽  
P. K. Verma ◽  
P. N. Pathak ◽  
A. Gupta ◽  
A. Ballal ◽  
...  
Keyword(s):  
Self Assembly ◽  
Tributyl Phosphate ◽  
Cloud Formation ◽  
Aggregate Formation ◽  
Triton X ◽  
Structural Insights

Nanoaggregate formation by self assembly was noticed during the cloud formation of Triton X-114 in the presence of dibenzoylmethane (DBM), thenoyltrifluoroacetone (HTTA) and 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and tributyl phosphate (TBP).

Synthesis and photoswitchable amphiphilicity and self-assembly properties of photochromic spiropyran derivatives

2020 ◽  
Vol 8 (39) ◽  
pp. 13676-13685
Author(s):  
Yiwei Zhang ◽  
Maggie Ng ◽  
Eugene Yau-Hin Hong ◽  
Alan Kwun-Wa Chan ◽  
Nathan Man-Wai Wu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Aggregate Formation

H-Aggregate formation of photochromic spiropyran derivatives via photoswitchable amphiphilicity.

scholarly journals Quantification of amyloid fibril polymorphism by nano-morphometry reveals the individuality of filament assembly

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Liam D. Aubrey ◽  
Ben J. F. Blakeman ◽  
Liisa Lutter ◽  
Christopher J. Serpell ◽  
Mick F. Tuite ◽  
...  
Keyword(s):  
Self Assembly ◽  
Amyloid Fibrils ◽  
Amyloid Fibril ◽  
Biological Function ◽  
Structural Basis ◽  
Distance Curve ◽  
Filament Assembly ◽  
Sample Heterogeneity ◽  
Structural Insights ◽  
Polymorphic Nature

Abstract Amyloid fibrils are highly polymorphic structures formed by many different proteins. They provide biological function but also abnormally accumulate in numerous human diseases. The physicochemical principles of amyloid polymorphism are not understood due to lack of structural insights at the single-fibril level. To identify and classify different fibril polymorphs and to quantify the level of heterogeneity is essential to decipher the precise links between amyloid structures and their functional and disease associated properties such as toxicity, strains, propagation and spreading. Employing gentle, force-distance curve-based AFM, we produce detailed images, from which the 3D reconstruction of individual filaments in heterogeneous amyloid samples is achieved. Distinctive fibril polymorphs are then classified by hierarchical clustering, and sample heterogeneity is objectively quantified. These data demonstrate the polymorphic nature of fibril populations, provide important information regarding the energy landscape of amyloid self-assembly, and offer quantitative insights into the structural basis of polymorphism in amyloid populations.

Aggregation behavior of tetraphenylporphyrin in aqueous surfactant solutions: Chiral premicellar J-aggregate formation

2015 ◽  
Vol 19 (07) ◽  
pp. 845-851 ◽  
Author(s):  
Margaret A. Gradova ◽  
Vladimir V. Artemov ◽  
Anton V. Lobanov
Keyword(s):  
Anionic Surfactant ◽  
Self Assembly ◽  
Photophysical Properties ◽  
Direct Synthesis ◽  
Aggregate Formation ◽  
Experimental Conditions ◽  
Aggregation State ◽  
Supramolecular Chirality ◽  
Surfactant Solutions ◽  
Surfactant Interactions

Porphyrin-surfactant interactions in aqueous solutions are known to result in the selfassembly of various supramolecular structures, including pigment-surfactant complexes, J- and H-aggregates, and solubilized dye species. Detailed studies on the mechanisms of the intermolecular interactions governing the above self-assembly processes allow to predict the aggregation state and hence, the photophysical properties of the dye-surfactant assemblies in order to perform a direct synthesis of the desired porphyrin-based nanostructures at the appropriate experimental conditions. This paper describes a novel example of the surfactant-induced J-aggregate formation from the diprotonated hydrophobic tetraphenylporphyrin species in submicellar aqueous anionic surfactant solutions. The above assemblies are characterized by a rod-like morphology and possess supramolecular chirality according to the CD measurements.

scholarly journals α-Helical Structures Drive Early Stages of Self-Assembly of Amyloidogenic Amyloid Polypeptide Aggregate Formation in Membranes

2013 ◽  
Vol 3 (1) ◽  
Author(s):  
Martina Pannuzzo ◽  
Antonio Raudino ◽  
Danilo Milardi ◽  
Carmelo La Rosa ◽  
Mikko Karttunen
Keyword(s):  
Self Assembly ◽  
Aggregate Formation ◽  
Helical Structures ◽  
Early Stages

scholarly journals Aggregate-based sub-CMC solubilization of hexadecane by surfactants

RSC Advances ◽  
2015 ◽  
Vol 5 (95) ◽  
pp. 78142-78149 ◽  
Author(s):  
Hua Zhong ◽  
Lei Yang ◽  
Guangming Zeng ◽  
Mark L. Brusseau ◽  
Yake Wang ◽  
...  
Keyword(s):  
Formation Mechanism ◽  
Aggregate Size ◽  
Aggregate Formation ◽  
Surface Excess ◽  
Triton X

SDBS or Triton X-100 at sub-CMC concentrations enhances hexadecane solubilization due to the aggregate formation mechanism. The sub-CMC aggregate size decreases with increasing surface excess of the surfactant.

scholarly journals Structural insights into peptide self‐assembly using photo‐induced crosslinking experiments and discontinuous molecular dynamics

AIChE Journal ◽  
2020 ◽  
Author(s):  
Samuel J. Bunce ◽  
Yiming Wang ◽  
Sheena E. Radford ◽  
Andrew J. Wilson ◽  
Carol K. Hall
Keyword(s):  
Molecular Dynamics ◽  
Self Assembly ◽  
Structural Insights

scholarly journals Structural Insights into the Intrinsic Self-Assembly of Par-3 N-Terminal Domain

Structure ◽  
2013 ◽  
Vol 21 (6) ◽  
pp. 997-1006 ◽  
Author(s):  
Yan Zhang ◽  
Wenjuan Wang ◽  
Jia Chen ◽  
Kai Zhang ◽  
Feng Gao ◽  
...  
Keyword(s):  
Self Assembly ◽  
Terminal Domain ◽  
Structural Insights

scholarly journals Atomistic simulation studies of ionic cyanine dyes: self-assembly and aggregate formation in aqueous solution

2021 ◽  
Author(s):  
Gary Yu ◽  
Martin Walker ◽  
Mark Richard Wilson
Keyword(s):  
Molecular Dynamics ◽  
Aqueous Solution ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Atomistic Simulation ◽  
Large Scale ◽  
Cyanine Dyes ◽  
Simulation Studies ◽  
Aggregate Formation ◽  
Dynamics Simulations

Cyanine dyes are known to form large-scale aggregates of various morphologies via spontaneous self-assembly in aqueous solution, akin to chromonic liquid crystals. Atomistic molecular dynamics simulations have been performed on...

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