scholarly journals Polymeric Composites with Embedded Nanocrystalline Cellulose for the Removal of Iron(II) from Contaminated Water

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1377 ◽  
Author(s):  
Anayet Kabir ◽  
Matthew Dunlop ◽  
Bishnu Acharya ◽  
Rabin Bissessur ◽  
Marya Ahmed
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Polymeric Composites ◽  
Industrial Applications ◽  
Nanocrystalline Cellulose ◽  
Soluble Form ◽  
Contaminated Water ◽  
One Pot ◽  
Treated Water

The exponential increase in heavy metal usage for industrial applications has led to the limited supply of clean water for human needs. Iron is one of the examples of heavy metals, which is responsible for an unpleasant taste of water and its discoloration, and is also associated with elevated health risks if it persists in drinking water for a prolonged period of time. The adsorption of a soluble form of iron (Fe2+) from water resources is generally accomplished in the presence of natural or synthetic polymers or nanoparticles, followed by their filtration from treated water. The self-assembly of these colloidal carriers into macroarchitectures can help in achieving the facile removal of metal-chelated materials from treated water and hence can reduce the cost and improve the efficiency of the water purification process. In this study, we aim to develop a facile one-pot strategy for the synthesis of polymeric composites with embedded nanocrystalline cellulose (NCC) for the chelation of iron(II) from contaminated water. The synthesis of the polymeric composites with embedded nanoparticles was achieved by the facile coating of ionic monomers on the surface of NCC, followed by their polymerization, crosslinking, and self-assembly in the form of three-dimensional architectures at room temperature. The composites prepared were analyzed for their physiochemical properties, antifouling properties, and for their iron(II)-chelation efficacies in vitro. The results indicate that the embedded-NCC polymeric composites have antifouling properties and exhibit superior iron(II)-chelation properties at both acidic and basic conditions.

In vitro and in vivo polysaccharides assembly: ultrastructural and cytochemical study of growing plant cell wall components.

1978 ◽  
Vol 36 (2) ◽  
pp. 434-435
Author(s):  
D. Reis ◽  
B. Vian ◽  
J. C. Roland
Keyword(s):  
Cell Wall ◽  
Self Assembly ◽  
Plant Cell Wall ◽  
Higher Plants ◽  
Three Dimensional ◽  
Cytochemical Study ◽  
Wall Components

Wall morphogenesis in higher plants is a problem still open to controversy. Until now the possibility of a transmembrane control and the involvement of microtubules were mostly envisaged. Self-assembly processes have been observed in the case of walls of Chlamydomonas and bacteria. Spontaneous gelling interactions between xanthan and galactomannan from Ceratonia have been analyzed very recently. The present work provides indications that some processes of spontaneous aggregation could occur in higher plants during the formation and expansion of cell wall.Observations were performed on hypocotyl of mung bean (Phaseolus aureus) for which growth characteristics and wall composition have been previously defined.In situ, the walls of actively growing cells (primary walls) show an ordered three-dimensional organization (fig. 1). The wall is typically polylamellate with multifibrillar layers alternately transverse and longitudinal. Between these layers intermediate strata exist in which the orientation of microfibrils progressively rotates. Thus a progressive change in the morphogenetic activity occurs.

scholarly journals Synthesis of ZnO/Polypyrrole Nanoring Composite as High-Performance Anode Materials for Lithium Ion Batteries

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Haipeng Li ◽  
Shuang Yang ◽  
Yan Zhao ◽  
Taizhe Tan ◽  
Xin Wang ◽  
...  
Keyword(s):  
Electrode Material ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Industrial Applications ◽  
Solution Chemistry ◽  
Raw Material ◽  
Ammonium Bromide ◽  
One Pot

ZnO has attracted considerable attention as electrode material in lithium-ion battery (LIB) due to its theoretically high capacity. However, poor electronic conductivity and huge volumetric changes during cycling limit its industrial applications. In this work, polypyrrole nanorings (PNRs) were successfully prepared via the solution chemistry method using pyrrole (Py) as raw material, ammonium persulfate (APS) as oxidant, and cetyltrimethyl ammonium bromide (CTAB) as surfactant. The ZnO/PNR composite was synthesized with zinc oxide nanoparticles absorbed on the surface of PPy nanorings through the one-pot in situ sol-gel method. The composite shows a three-dimensional intertwined network structure where the size of polypyrrole nanorings ranges from 80 nm to 100 nm in diameter and the average size of uniformly distributed ZnO nanocrystals is 10.49 nm. The unique three-dimensional conductive framework can provide good electronic contact between the ZnO particles and buffer the volume variation during the lithiation/delithiation processes. As an electrode material for LIBs, the ZnO/PNR composite delivers a first cycle discharge capacity of 1658 mAh g-1 and a capacity retention of 50.7% over 150 cycles at 200 mA g-1, indicating high specific capacity and outstanding cycle stability.

One-pot self-assembly of three-dimensional graphene macroassemblies with porous core and layered shell

2011 ◽  
Vol 21 (33) ◽  
pp. 12352 ◽  
Author(s):  
Wei Lv ◽  
Ying Tao ◽  
Wang Ni ◽  
Zhi Zhou ◽  
Fang-Yuan Su ◽  
...  
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Layered Shell ◽  
One Pot ◽  
Porous Core

scholarly journals In vitro Self-Assembly of Human Pericyte-Supported Endothelial Microvessels in Three-Dimensional Coculture: A Simple Model for Interrogating Endothelial-Pericyte Interactions

2013 ◽  
Vol 50 (4) ◽  
pp. 324-331 ◽  
Author(s):  
J.P. Waters ◽  
M.S. Kluger ◽  
M. Graham ◽  
W.G. Chang ◽  
J.R. Bradley ◽  
...  
Keyword(s):  
Simple Model ◽  
Self Assembly ◽  
Three Dimensional

scholarly journals One-pot system for synthesis, assembly, and display of functional single-span membrane proteins on oil–water interfaces

2015 ◽  
Vol 113 (3) ◽  
pp. 608-613 ◽  
Author(s):  
Peter J. Yunker ◽  
Haruichi Asahara ◽  
Kuo-Chan Hung ◽  
Corey Landry ◽  
Laura R. Arriaga ◽  
...  
Keyword(s):  
Protein Synthesis ◽  
Membrane Proteins ◽  
Self Assembly ◽  
Hydrophobic Interactions ◽  
Cell Communication ◽  
Transmembrane Helices ◽  
One Pot ◽  
Surface Receptors ◽  
Coupling Protein

Single-span membrane proteins (ssMPs) represent approximately one-half of all membrane proteins and play important roles in cellular communications. However, like all membrane proteins, ssMPs are prone to misfolding and aggregation because of the hydrophobicity of transmembrane helices, making them difficult to study using common aqueous solution-based approaches. Detergents and membrane mimetics can solubilize membrane proteins but do not always result in proper folding and functionality. Here, we use cell-free protein synthesis in the presence of oil drops to create a one-pot system for the synthesis, assembly, and display of functional ssMPs. Our studies suggest that oil drops prevent aggregation of some in vitro-synthesized ssMPs by allowing these ssMPs to localize on oil surfaces. We speculate that oil drops may provide a hydrophobic interior for cotranslational insertion of the transmembrane helices and a fluidic surface for proper assembly and display of the ectodomains. These functionalized oil drop surfaces could mimic cell surfaces and allow ssMPs to interact with cell surface receptors under an environment closest to cell–cell communication. Using this approach, we showed that apoptosis-inducing human transmembrane proteins, FasL and TRAIL, synthesized and displayed on oil drops induce apoptosis of cultured tumor cells. In addition, we take advantage of hydrophobic interactions of transmembrane helices to manipulate the assembly of ssMPs and create artificial clusters on oil drop surfaces. Thus, by coupling protein synthesis with self-assembly at the water–oil interface, we create a platform that can use recombinant ssMPs to communicate with cells.

scholarly journals An Individual Patient's “Body” on Chips—How Organismoid Theory Can Translate Into Your Personal Precision Therapy Approach

2021 ◽  
Vol 8 ◽  
Author(s):  
Uwe Marx ◽  
Enrico Accastelli ◽  
Rhiannon David ◽  
Hendrik Erfurth ◽  
Leopold Koenig ◽  
...  
Keyword(s):  
Human Body ◽  
Self Assembly ◽  
Three Dimensional ◽  
Disease Process ◽  
Egg Cell ◽  
Human Stem Cells ◽  
Human Organ ◽  
Cell Therapies ◽  
Precision Therapy

The first concepts for reproducing human systemic organismal biology in vitro were developed over 12 years ago. Such concepts, then called human- or body-on-a-chip, claimed that microphysiological systems would become the relevant technology platform emulating the physiology and morphology of human organisms at the smallest biologically acceptable scale in vitro and, therefore, would enable the selection of personalized therapies for any patient at unprecedented precision. Meanwhile, the first human organoids—stem cell-derived complex three-dimensional organ models that expand and self-organize in vitro—have proven that in vitro self-assembly of minute premature human organ-like structures is feasible, once the respective stimuli of ontogenesis are provided to human stem cells. Such premature organoids can precisely reflect a number of distinct physiological and pathophysiological features of their respective counterparts in the human body. We now develop the human-on-a-chip concepts of the past into an organismoid theory. We describe the current concept and principles to create a series of organismoids—minute, mindless and emotion-free physiological in vitro equivalents of an individual's mature human body—by an artificially short process of morphogenetic self-assembly mimicking an individual's ontogenesis from egg cell to sexually mature organism. Subsequently, we provide the concept and principles to maintain such an individual's set of organismoids at a self-sustained functional healthy homeostasis over very long time frames in vitro. Principles how to perturb a subset of healthy organismoids by means of the natural or artificial induction of diseases are enrolled to emulate an individual's disease process. Finally, we discuss using such series of healthy and perturbed organismoids in predictively selecting, scheduling and dosing an individual patient's personalized therapy or medicine precisely. The potential impact of the organismoid theory on our healthcare system generally and the rapid adoption of disruptive personalized T-cell therapies particularly is highlighted.

Controlled synthesis of V2O5/MWCNT core/shell hybrid aerogels through a mixed growth and self-assembly methodology for supercapacitors with high capacitance and ultralong cycle life

2015 ◽  
Vol 3 (30) ◽  
pp. 15692-15699 ◽  
Author(s):  
Yingjie Wu ◽  
Guohua Gao ◽  
Huiyu Yang ◽  
Wenchao Bi ◽  
Xing Liang ◽  
...  
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Three Dimensional ◽  
Cycle Life ◽  
Core Shell ◽  
Controlled Synthesis ◽  
One Pot ◽  
High Capacitance ◽  
Sol Gel Process ◽  
Hybrid Aerogels

Three-dimensional V2O5/MWCNT core/shell hybrid aerogels were controllably synthesized through a mixed growth and self-assembly methodology in a one-pot sol–gel process.

Soluble salt self-assembly-assisted synthesis of three-dimensional hierarchical porous carbon networks for supercapacitors

2015 ◽  
Vol 3 (44) ◽  
pp. 22266-22273 ◽  
Author(s):  
Shan Zhu ◽  
Jiajun Li ◽  
Chunnian He ◽  
Naiqin Zhao ◽  
Enzuo Liu ◽  
...  
Keyword(s):  
Self Assembly ◽  
Three Dimensional ◽  
Water Soluble ◽  
The Self ◽  
Soluble Salts ◽  
Hierarchical Porous Carbon ◽  
One Pot ◽  
Hierarchical Porous ◽  
Hierarchical Porous Carbons ◽  
Carbon Networks

Three-dimensional hierarchical porous carbons are synthesized via a simple one-pot method using the self-assembly of various water-soluble salts as structure-directing templates, which exhibit excellent capacitive performance.

scholarly journals Three-Dimensional (3D) Printed Silver Nanoparticles/Alginate/Nanocrystalline Cellulose Hydrogels: Study of the Antimicrobial and Cytotoxicity Efficacy

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 844 ◽  
Author(s):  
Carlo Bergonzi ◽  
Giulia Remaggi ◽  
Claudia Graiff ◽  
Laura Bergamonti ◽  
Marianna Potenza ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Molecular Mechanisms ◽  
Three Dimensional ◽  
Morphological Characterization ◽  
Nanocrystalline Cellulose ◽  
In Vitro Tests ◽  
Mechanical Resistance ◽  
Natural Polymers ◽  
Targeted Analysis

Here, a formulation of silver nanoparticles (AgNPs) and two natural polymers such as alginate (ALG) and nanocrystalline cellulose (CNC) was developed for the 3D printing of scaffolds with large surface area, improved mechanical resistance and sustained capabilities to promote antimicrobial and cytotoxic effects. Mechanical resistance, water content, morphological characterization and silver distribution of the scaffolds were provided. As for applications, a comparable antimicrobial potency against S. aureus and P. aeruginosa was demonstrated by in vitro tests as function of the AgNP concentration in the scaffold (Minimal Inhibitory Concentration value: 10 mg/mL). By reusing the 3D system the antimicrobial efficacy was demonstrated over at least three applications. The cytotoxicity effects caused by administration of AgNPs to hepatocellular carcinoma (HepG2) cell culture through ALG and ALG/CNC scaffold were discussed as a function of time and dose. Finally, the liquid chromatography-mass spectrometry (LC-MS) technique was used for targeted analysis of pro-apoptotic initiation and executioner caspases, anti-apoptotic and proliferative proteins and the hepatocyte growth factor, and provided insights about molecular mechanisms involved in cell death induction.

Coordination-driven self-assembly: construction of a Fe3O4–graphene hybrid 3D framework and its long cycle lifetime for lithium-ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40249-40257 ◽  
Author(s):  
Zhimin Ren ◽  
Siqi Yu ◽  
Xinxin Fu ◽  
Lin Shi ◽  
Chunxiao Sun ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Uniform Distribution ◽  
Self Assembly ◽  
Solvothermal Method ◽  
Three Dimensional ◽  
Lithium Ion ◽  
One Pot ◽  
Long Cycle ◽  
3D Framework

A three-dimensional graphene framework with uniform distribution of hierarchical Fe3O4 spheres was prepared via a one-pot solvothermal method.

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