Aurothiomalate as Preventive and Chain-Breaking Antioxidant in Radical Degradation of High-Molar-Mass Hyaluronan

2011 ◽  
Vol 8 (7) ◽  
pp. 1274-1283 ◽  
Author(s):  
Katarína Valachová ◽  
Andrea Vargová ◽  
Peter Rapta ◽  
Eva Hrabárová ◽  
František Dráfi ◽  
...  
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Radical Degradation ◽  
Chain Breaking

scholarly journals Free-radical degradation of high-molar-mass hyaluronan induced by ascorbate plus cupric ions: Testing of stobadine and its two derivatives in function as antioxidants

2012 ◽  
Vol 31 (01) ◽  
pp. 57-64 ◽  
Author(s):  
Lubica Surovcikova-Machova ◽  
Katarina Valachova ◽  
Maria Banasova ◽  
Vladimir Snirc ◽  
Elena Priesolova ◽  
...  
Keyword(s):  
Free Radical ◽  
Molar Mass ◽  
High Molar Mass ◽  
Radical Degradation

ChemInform Abstract: Radical Degradation of High Molar Mass Hyaluronan Induced by Ascorbate Plus Cupric Ions Testing of Arbutin in the Function of Antioxidant

ChemInform ◽  
2013 ◽  
Vol 44 (51) ◽  
pp. no-no
Author(s):  
K. Valachova ◽  
P. Rapta ◽  
M. Slovakova ◽  
E. Priesolova ◽  
M. Nagy ◽  
...  
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Radical Degradation

scholarly journals Assessment of the Substance Antioxidative Profile by Hyaluronan, Cu(II) and Ascorbate

Pharmaceutics ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1815
Author(s):  
Katarína Valachová ◽  
Ladislav Šoltés
Keyword(s):  
Antioxidant Activity ◽  
Experimental Approach ◽  
Molar Mass ◽  
Oxidative Degradation ◽  
Inhibitory Effect ◽  
Water Soluble ◽  
High Molar Mass ◽  
Initiation And Propagation ◽  
Chain Breaking ◽  
Exogenous Substances

In the minireview presented here, the authors discuss the evaluation of inhibitory effect of substances in the phases of initiation and propagation of high-molar-mass hyaluronan oxidative degradation. The experimental approach should be considered as original since on using a simple experimental assay it is possible to prove both the so-called “preventive” and “chain-breaking” antioxidant activity of investigated water-soluble endo- or exogenous substances.

Paper Chemistry: Interactions of thermo mechanical pulp fractions with high molar mass cationic polyacrylamides: Part 2. Flocculation

2010 ◽  
Vol 25 (3) ◽  
pp. 310-318 ◽  
Author(s):  
Tero Taipale ◽  
Janne Laine ◽  
Susanna Holappa ◽  
Jonni Ahlgren ◽  
Juan Cecchini
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Mechanical Pulp ◽  
Paper Chemistry

scholarly journals Highly Efficient MOF Catalyst Systems for CO2 Conversion to Bis-Cyclic Carbonates as Building Blocks for NIPHUs (Non-Isocyanate Polyhydroxyurethanes) Synthesis

Catalysts ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 628
Author(s):  
Adolfo Benedito ◽  
Eider Acarreta ◽  
Enrique Giménez
Keyword(s):  
Molar Mass ◽  
Cycloaddition Reaction ◽  
Building Blocks ◽  
Catalyst System ◽  
Cyclic Carbonate ◽  
Ammonium Bromide ◽  
Cyclic Carbonates ◽  
High Molar Mass ◽  
Highly Efficient ◽  
Free Process

The present paper describes a greener sustainable route toward the synthesis of NIPHUs. We report a highly efficient solvent-free process to produce [4,4′-bi(1,3-dioxolane)]-2,2′-dione (BDC), involving CO2, as renewable feedstock, and bis-epoxide (1,3-butadiendiepoxide) using only metal–organic frameworks (MOFs) as catalysts and cetyltrimethyl-ammonium bromide (CTAB) as a co-catalyst. This synthetic procedure is evaluated in the context of reducing global emissions of waste CO2 and converting CO2 into useful chemical feedstocks. The reaction was carried out in a pressurized reactor at pressures of 30 bars and controlled temperatures of around 120–130 °C. This study examines how reaction parameters such as catalyst used, temperature, or reaction time can influence the molar mass, yield, or reactivity of BDC. High BDC reactivity is essential for producing high molar mass linear non-isocyanate polyhydroxyurethane (NIPHU) via melt-phase polyaddition with aliphatic diamines. The optimized Al-OH-fumarate catalyst system described in this paper exhibited a 78% GC-MS conversion for the desired cyclic carbonates, in the absence of a solvent and a 50 wt % chemically fixed CO2. The cycloaddition reaction could also be carried out in the absence of CTAB, although lower cyclic carbonate yields were observed.

scholarly journals High Molar Mass Polycarbonate via Dynamic Solution Transcarbonation Using Bis(methyl salicyl) Carbonate, an Activated Carbonate

2021 ◽  
pp. 2100186
Author(s):  
Annelore Aerts ◽  
Camiel Kroonen ◽  
Jan Henk Kamps ◽  
Rint P. Sijbesma ◽  
Johan P. A. Heuts
Keyword(s):  
Molar Mass ◽  
High Molar Mass ◽  
Dynamic Solution

Synthesis of high molar mass poly(12-hydroxydodecanoic acid) in brønsted acid ionic liquids

Polymer ◽  
2010 ◽  
Vol 51 (6) ◽  
pp. 1218-1221 ◽  
Author(s):  
Elise-Marie Dukuzeyezu ◽  
Hervé Lefebvre ◽  
Martine Tessier ◽  
Alain Fradet
Keyword(s):  
Ionic Liquids ◽  
Molar Mass ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
High Molar Mass ◽  
Brönsted Acid
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