Chemically Modified Polymers Containing Isocyanide Functional Groups as Supports for Enzyme Immobilization

1977 ◽  
pp. 153-167 ◽  
Author(s):  
L. Goldstein ◽  
A. Freeman ◽  
D. Blassberger ◽  
R. Granot ◽  
M. Sokolovsky
Keyword(s):  
Functional Groups ◽  
Enzyme Immobilization ◽  
Chemically Modified ◽  
Modified Polymers

Solvent Extraction of Some Metal Ions with Lipophilic Chitosan Chemically Modified with Functional Groups of Dithiocarbamate

2001 ◽  
Vol 30 (7) ◽  
pp. 698-699 ◽  
Author(s):  
Katsutoshi Inoue ◽  
Kazuharu Yoshizuka ◽  
Keisuke Ohto ◽  
Hirofumi Nakagawa
Keyword(s):  
Solvent Extraction ◽  
Metal Ions ◽  
Functional Groups ◽  
Chemically Modified

Adsorption Behavior of Waste Paper Gels Chemically Modified with Functional Groups of Primary Amine and Ethylenediamine for Some Metal Ions

2007 ◽  
Vol 25 (6) ◽  
pp. 845-855 ◽  
Author(s):  
Hidetaka Kawakita ◽  
Katsutoshi Inoue ◽  
Keisuke Ohto ◽  
Satomi Shimada ◽  
Kyoko Itayama
Keyword(s):  
Metal Ions ◽  
Functional Groups ◽  
Primary Amine ◽  
Adsorption Behavior ◽  
Waste Paper ◽  
Chemically Modified

Chemically modified surface functional groups of Alcaligenes sp. S-XJ-1 to enhance its demulsifying capability

2017 ◽  
Vol 101 (9) ◽  
pp. 3839-3848
Author(s):  
Yuyan Zhang ◽  
Jia Liu ◽  
Xiangfeng Huang ◽  
Lijun Lu ◽  
Kaiming Peng
Keyword(s):  
Functional Groups ◽  
Surface Functional Groups ◽  
Chemically Modified ◽  
Modified Surface

scholarly journals Mapping Organic Functional Groups at Nanosurfaces Using Colloidal Gold Conjugation

2021 ◽  
Author(s):  
Nicolas Debons ◽  
Dounia Dems ◽  
Thibaud Coradin ◽  
Carole Aimé
Keyword(s):  
Spatial Distribution ◽  
Functional Groups ◽  
Silica Particle ◽  
Chemical Nature ◽  
Particle Surface ◽  
Complete Understanding ◽  
Gold Colloids ◽  
Chemically Modified ◽  
Organic Functional Groups ◽  
Amine Groups

The functionalization of nanomaterials surface is key to improve their stability, reactivity and confer specific properties. However, mapping functional groups at the nanoscale remains difficult, <i>i.e.</i> identifying chemical nature but also spatial distribution. It is particularly challenging for organic groups and non-planar objects such as nanoparticles. Here we report a strategy for mapping amine groups on the surface of silica particles using chemically-modified gold colloids, which are used as tags to specifically and spatially identify these organic groups under electron microscopy. A complete understanding of the correlation between spatial distribution of gold colloids and chemical state of the silica particle surface (by XPS) is presented. The range of reliability of this strategy for mapping organic groups at nanointerfaces is assessed and its implications for biofunctional nanoobjects where interdistance of biomolecules are of paramount importance are discussed.

Spatiotemporal control of calcium carbonate nucleation using mechanical deformations of elastic surfaces

Soft Matter ◽  
2020 ◽  
Vol 16 (26) ◽  
pp. 6038-6043
Author(s):  
Jay M. Taylor ◽  
Abhiteja Konda ◽  
Stephen A. Morin
Keyword(s):  
Calcium Carbonate ◽  
Functional Groups ◽  
Interfacial Energy ◽  
Crystal Nucleation ◽  
Chemically Modified ◽  
Mechanical Deformations ◽  
Spatiotemporal Control ◽  
Elastic Surfaces

We demonstrate that chemically modified elastic surfaces can be used to control crystal nucleation. By stretching the elastomer, we redistribute functional groups to tune interfacial energy and accelerate crystal nucleation.

scholarly journals Chemical Functionalization of Carbon Nanotubes and its Effects on Electrical Conductivity

2014 ◽  
Vol 28 ◽  
pp. 51-61 ◽  
Author(s):  
José Encarnación Moreno Marcelino ◽  
Enrique Vigueras Santiago ◽  
Gustavo Lopez-Tellez ◽  
Susana Hernández López
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Electrical Conductivity ◽  
Functional Groups ◽  
Compression Technique ◽  
Chemical Functionalization ◽  
Mechanical Stirring ◽  
Chemically Modified ◽  
Functionalization Of Carbon Nanotubes ◽  
Microraman Spectroscopy

This work presents the study of the electrical conductivity in MWNT as a function of three different chemical functionalization conditions. Unmodified and chemically modified MWNT were characterized by microRaman spectroscopy, XPS and SEM whereas the electrical conductivity was determined by dust compression technique. MWNT were modified using three different oxidation conditions: (1) a mix of concentrated acids, H2SO4/HNO3 (3:1, v/v) sonicated for 2 h; (2) same mixture as (1) but using mechanical stirring for 6 h and (3) a reflux of an aqueous solution of HNO3 (20%, v/v) and mechanical stirring for 6 h. The characterization evidenced different functionalization degrees, based on the formation and detection of functional groups such as ether, carbonyl and carboxyl in different percentages. The unmodified CNT presented a conductivity of 510 S/m which decreased as the functionalization degree increased. For reactions (1) and (2) such conductivity was reduced by 8.8 and 15.5%, respectively, whereas for condition (3) it only decreased 0.98%.

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