scholarly journals Methoxylation of α-pinene over poly(vinyl alcohol) containing sulfonic acid groups

2009 ◽  
Vol 147 (2-3) ◽  
pp. 302-306 ◽  
Author(s):  
D.S. Pito ◽  
I.M. Fonseca ◽  
A.M. Ramos ◽  
J. Vital ◽  
J.E. Castanheiro
Keyword(s):  
Vinyl Alcohol ◽  
Sulfonic Acid ◽  
Poly Vinyl Alcohol ◽  
Sulfonic Acid Groups

scholarly journals 8-Hydroxyquinoline-5-Sulfonic Acid-Containing Poly(Vinyl Alcohol)/Chitosan Electrospun Materials and Their Cu2+ and Fe3+ Complexes: Preparation, Antibacterial, Antifungal and Antitumor Activities

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2690
Author(s):  
Milena Ignatova ◽  
Nevena Manolova ◽  
Iliya Rashkov ◽  
Nadya Markova ◽  
Rositsa Kukeva ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Sulfonic Acid ◽  
Electron Paramagnetic Resonance Spectroscopy ◽  
Local Treatment ◽  
Poly Vinyl Alcohol ◽  
Resonance Spectroscopy ◽  
Fibrous Materials ◽  
Antitumor Activities ◽  
Antibacterial And Antifungal Activities

Novel poly(vinyl alcohol) (PVA)/chitosan (Ch)-based fibrous materials containing an ionizable model drug, 8-hydroxyquinoline-5-sulfonic acid (SQ), were successfully fabricated by electrospinning. Complexes between the components of the crosslinked PVA/Ch/SQ mats and Cu2+ and Fe3+ ions were formed. The coordination of these ions in the mats was examined by electron paramagnetic resonance spectroscopy (EPR). The microbiological screening against S. aureus and C. albicans revealed that both the incorporation of SQ in the mats and the complexation with Cu2+ and Fe3+ imparted to these materials antibacterial and antifungal activities. Moreover, the SQ-containing mats and their complexes displayed good cytotoxicity against human cervical HeLa tumor cells. The most prominent was the cytotoxicity of the Cu2+ complex of the mats. The combined antibacterial, antifungal and in vitro antitumor activities render these novel materials promising candidates for wound dressing applications and for application in the local treatment of cervical tumors.

Composite proton conducting membranes from chitosan, poly(vinyl alcohol) and sulfonic acid-functionalized silica nanoparticles

2021 ◽  
Vol 46 (2) ◽  
pp. 2479-2490
Author(s):  
Trin Kamjornsupamitr ◽  
Thanakorn Sangthumchai ◽  
Pranorm Saejueng ◽  
Jitapa Sumranjit ◽  
Andrew J. Hunt ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Vinyl Alcohol ◽  
Sulfonic Acid ◽  
Poly Vinyl Alcohol ◽  
Functionalized Silica ◽  
Proton Conducting ◽  
Conducting Membranes ◽  
Functionalized Silica Nanoparticles
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