Robust and nanostructured chitosan–silica hybrids for bone repair application

2020 ◽  
Vol 8 (23) ◽  
pp. 5042-5051 ◽  
Author(s):  
Jin-Ning Liang ◽  
Le-Ping Yan ◽  
Yi-Fan Dong ◽  
Xiao Liu ◽  
Gang Wu ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Steric Hindrance ◽  
Bone Repair ◽  
Silica Particles ◽  
Acidic Condition ◽  
Homogeneous Distribution ◽  
Ionic Interaction ◽  
Silica Hybrids ◽  
Nanosized Silica ◽  
Weak Acidic Condition

Acetic acid contributes to the strong ionic interaction between Si ions and chitosan by providing a weak acidic condition, and its steric hindrance effect leads to the formation of nanosized silica particles and their homogeneous distribution.

Bisphenol A oxidative removal by ferrate (Fe(VI)) under a weak acidic condition

2012 ◽  
Vol 84 ◽  
pp. 46-51 ◽  
Author(s):  
Panyue Zhang ◽  
Guangming Zhang ◽  
Jinhua Dong ◽  
Maohong Fan ◽  
Guangming Zeng
Keyword(s):  
Bisphenol A ◽  
Acidic Condition ◽  
Oxidative Removal ◽  
Weak Acidic Condition

scholarly journals Development of 3D Bioactive Scaffolds through 3D Printing Using Wollastonite–Gelatin Inks

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2420 ◽  
Author(s):  
Filis Curti ◽  
Izabela-Cristina Stancu ◽  
Georgeta Voicu ◽  
Horia Iovu ◽  
Cristina-Ioana Dobrita ◽  
...  
Keyword(s):  
3D Printing ◽  
Bone Repair ◽  
Homogeneous Distribution ◽  
Orthopedic Trauma ◽  
Fish Gelatin ◽  
Mass Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bioactive Scaffolds ◽  
Microscopy Images

The bioactivity of scaffolds represents a key property to facilitate the bone repair after orthopedic trauma. This study reports the development of biomimetic paste-type inks based on wollastonite (CS) and fish gelatin (FG) in a mass ratio similar to natural bone, as an appealing strategy to promote the mineralization during scaffold incubation in simulated body fluid (SBF). High-resolution 3D scaffolds were fabricated through 3D printing, and the homogeneous distribution of CS in the protein matrix was revealed by scanning electron microscopy/energy-dispersive X-ray diffraction analysis (SEM/EDX) micrographs. The bioactivity of the scaffold was suggested by an outstanding mineralization capacity revealed by the apatite layers deposited on the scaffold surface after immersion in SBF. The biocompatibility was demonstrated by cell proliferation established by MTT assay and fluorescence microscopy images and confirmed by SEM micrographs illustrating cell spreading. This work highlights the potential of the bicomponent inks to fabricate 3D bioactive scaffolds and predicts the osteogenic properties for bone regeneration applications.

Dispersibility in organic solvents of nanosized silica particles used in semiconductor package substrates

2009 ◽  
Vol 155 (1-2) ◽  
pp. 493-498 ◽  
Author(s):  
Yoshihiro Nakamura ◽  
Rieko Kobayashi ◽  
Masayoshi Matsui ◽  
Jun-ichi Ozaki
Keyword(s):  
Organic Solvents ◽  
Silica Particles ◽  
Nanosized Silica

scholarly journals Practical method to obtain α-acetoxyketones promoted by (diacetoxyiodo)benzene and acetic acid

2019 ◽  
Author(s):  
Osvaldo J Quintana-Romero ◽  
Jorge Camacho-Ruiz ◽  
Armando Ariza-Castolo
Keyword(s):  
Acetic Acid ◽  
Steric Hindrance ◽  
Oxidation Reaction ◽  
Simple Procedure ◽  
Practical Method ◽  
Double Bonds

By means of a simple procedure, we prepared α-acetoxyketones from a variety of enolizable ketones with PhI(OAc)2 in the presence of acetic acid. The selectivity of the reactions depended on steric hindrance, and some other reactions were observed, such as the formation of N=N or C=C double bonds through an oxidation reaction.

scholarly journals Copper-Containing Rod-Shaped Nanosized Silica Particles for Microwave-Assisted Synthesis of Triazoles in Aqueous Solution

2015 ◽  
Vol 3 (10) ◽  
pp. 2516-2525 ◽  
Author(s):  
Najib Mnasri ◽  
Jeff L. Nyalosaso ◽  
Evelina Colacino ◽  
Gaelle Derrien ◽  
Frédéric Lamaty ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Silica Particles ◽  
Microwave Assisted Synthesis ◽  
Microwave Assisted ◽  
Nanosized Silica

Automated Oligonucleotide Solid-Phase Synthesis on Nanosized Silica Particles Using Nano-on-Micro Assembled Particle Supports

Langmuir ◽  
2010 ◽  
Vol 26 (7) ◽  
pp. 4941-4950 ◽  
Author(s):  
Carole Farre ◽  
Muriel Lansalot ◽  
Rana Bazzi ◽  
Stéphane Roux ◽  
Christophe A. Marquette ◽  
...  
Keyword(s):  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Silica Particles ◽  
Phase Synthesis ◽  
Nanosized Silica

Excess volumes and excess enthalpies of acetic and its methyl-substituted acids + acetonitrile

1985 ◽  
Vol 63 (11) ◽  
pp. 3269-3275 ◽  
Author(s):  
B. S. Lark ◽  
T. S. Banipal
Keyword(s):  
Acetic Acid ◽  
Propionic Acid ◽  
Concentration Dependence ◽  
Steric Hindrance ◽  
Isobutyric Acid ◽  
Excess Volumes ◽  
Excess Enthalpies ◽  
Dilatometric Method ◽  
Dipole Interactions

Excess volumes of the systems acetonitrile (ACN) + acetic acid (AA), + propionic acid (PA) and + isobutyric acid (IBA) at 298.15 and 308.15 K and + trimethylacetic acid (TMA) at 313.15 K have been measured using dilatometric method. The observed values are found to be negative for the first three systems while the last system has sigmoid concentration dependence. Excess enthalpies for the first three systems at 308.15 K and for the last system at 313.15 K have also been determined and found to be positive. The results have been explained in terms of depolymerization of the acids, dipole–dipole interactions between heteromolecules and the steric hindrance caused by the increasing methylation.

Formation and Drying of Colloidal Crystals Using Nanosized Silica Particles

Langmuir ◽  
2006 ◽  
Vol 22 (5) ◽  
pp. 2249-2257 ◽  
Author(s):  
Frédéric Juillerat ◽  
Paul Bowen ◽  
Heinrich Hofmann
Keyword(s):  
Colloidal Crystals ◽  
Silica Particles ◽  
Nanosized Silica
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