Chemical modification of wood by non-formaldehyde cross-linking reagents

1994 ◽  
Vol 28 (2) ◽  
Author(s):  
Rie Yasuda ◽  
Kazuya Minato
Keyword(s):  
Chemical Modification ◽  
Cross Linking

scholarly journals Double-Cross-Linked Networks Based on Methacryloyl Mucin

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1706
Author(s):  
Elena Olăreț ◽  
Brîndușa Bălănucă ◽  
Andra Mihaela Onaș ◽  
Jana Ghițman ◽  
Horia Iovu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Aqueous Solution ◽  
Chemical Modification ◽  
Structural Modification ◽  
Aqueous Media ◽  
Cross Linking ◽  
Ph Values ◽  
Acid Aqueous Solution ◽  
Reaction Media ◽  
Double Cross

Mucin is a glycoprotein with proven potential in the biomaterials field, but its use is still underexploited for such applications. The present work aims to produce a synthesis of methacryloyl mucin single-network (SN) hydrogels and their double-cross-linked-network (DCN) counterparts. Following the synthesis of the mucin methacryloyl derivative, various SN hydrogels are prepared through the photopolymerization of methacrylate bonds, using reaction media with different pH values. The SN hydrogels are converted into DCN systems via supplementary cross-linking in tannic acid aqueous solution. The chemical modification of mucin is described, and the obtained product is characterized; the structural modification of mucin is assessed through FTIR spectroscopy, and the circular dichroism and the isoelectric point of methacryloyl mucin is evaluated. The affinity for aqueous media of both SN and DCN hydrogels is estimated, and the mechanical properties of the systems are assessed, both at macroscale through uniaxial compression and rheology tests and also at microscale through nanoindentation tests.

Role of Oxygen in Cross-Linking and Chemical Modification of Collagen by Glucose

Diabetes ◽  
1992 ◽  
Vol 41 (Supplement_2) ◽  
pp. 42-48 ◽  
Author(s):  
M.-X. Fu ◽  
K. J. Knecht ◽  
S. R. Thorpe ◽  
J. W. Baynes
Keyword(s):  
Chemical Modification ◽  
Cross Linking

Aromatic polyesters containing pendant azido groups: Synthesis, characterization, chemical modification and thermal cross-linking

2019 ◽  
Vol 116 ◽  
pp. 180-189 ◽  
Author(s):  
Samadhan S. Nagane ◽  
Savita Verma ◽  
Bhausaheb V. Tawade ◽  
Prakash S. Sane ◽  
Sushilkumar A. Dhanmane ◽  
...  
Keyword(s):  
Chemical Modification ◽  
Cross Linking ◽  
Aromatic Polyesters

scholarly journals Thermodynamic and structural characterization of 2′-nitrogen-modified RNA duplexes

2004 ◽  
Vol 32 (11) ◽  
pp. 3446-3455 ◽  
Author(s):  
John W. Pham ◽  
Ishwar Radhakrishnan ◽  
Erik J. Sontheimer
Keyword(s):  
Molecular Modeling ◽  
Nmr Spectroscopy ◽  
Nucleic Acids ◽  
Chemical Modification ◽  
Structural Characterization ◽  
Cross Linking ◽  
Base Pairing ◽  
Alkyl Groups ◽  
Rna Duplexes

Abstract 2′-aminonucleosides are commonly used as sites of post-synthetic chemical modification within nucleic acids. As part of a larger cross-linking strategy, we appended alkyl groups onto the N2′ position of 2′-amino-modified RNAs via 2′-ureido and 2′-amido linkages. We have characterized the thermodynamics of 2′-amino, 2′-alkylamido and 2′-alkylureido-modified RNA duplexes and show that 2′-ureido-modified RNAs are significantly more stable than analogous 2′-amido-modified RNAs. Using NMR spectroscopy and NMR-based molecular modeling of 2′-modified RNA duplexes, we examined the effects that 2′-nitrogen modifications have on RNA helices. Our data suggest that the 2′-ureido group forms a specific intra-nucleoside interaction that cannot occur within 2′-amido-modified helices. These results indicate that 2′-ureido modifications are superior to analogous 2′-amido ones for applications that require stable base pairing.

Chemical modification and cross-linking of neurophysin tyrosine-49

Biochemistry ◽  
1987 ◽  
Vol 26 (4) ◽  
pp. 995-1003 ◽  
Author(s):  
Vinod Sardana ◽  
Jeffrey D. Carlson ◽  
Esther Breslow ◽  
David Peyton
Keyword(s):  
Chemical Modification ◽  
Cross Linking

Acrylate Hydrogel Modification Using a Cross-Linking Agent for Increasing Multilayer Glazing Flame Resistance

2015 ◽  
Vol 1085 ◽  
pp. 265-269 ◽  
Author(s):  
Daria Litovchenko ◽  
Igor Burmistrov ◽  
Lydia Panova ◽  
Anna Yu. Godymchuk ◽  
Natalia Kosova
Keyword(s):  
Chemical Modification ◽  
Fire Resistance ◽  
Window Glass ◽  
Coke Residue ◽  
Cross Linking ◽  
Flame Resistance ◽  
Kinetics Of ◽  
Thick Glass

The design of layers for multilayer flame-resistant glass is a vital task in terms of upgrading fire resistance of window glass units. This paper describes chemical modification of flame-proof acrylate hydrogel layers and shows experimentally how a cross-linking agent — hexamethoxymethylmelamine ether – influences the kinetics of hydrogel polymerization and the enhancement of carbonated structures yield. It has been determined that adding HMMM to the hydrogel composition raises the coke residue yield from 10 % to 35 % and increases the 19 mm thick glass flame resistance class from EI30 to EI50.

Sign in / Sign up

Export Citation Format

Share Document