A resin containing motifs of maleic acid and glycine: a super-adsorbent for adsorptive removal of basic dye pararosaniline hydrochloride and Cd(II) from water

Summary1. The presence of citrate in the normal fibrin enhanced the fibrinolytic activity of plasminogen activators, including trypsin. The effect of proteases (on normal or on heated fibrin, containing citrate) was not significantly influenced.2. The effect of plasminogen activators was also increased when excess of plasminogen was present in the normal fibrin plates.3. Fumaric acid and maleic acid belong to the polycarboxylic acids producing an enhancing effect.

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Environmentally Friendly Preparation of Magnetic Composites Featuring Proteolytic Properties

INEOS OPEN ◽

10.32931/io2019a ◽

2020 ◽

Author(s):

N. A. Samoilova ◽

Keyword(s):

Enzyme Immobilization ◽

Maleic Acid ◽

Environmentally Friendly ◽

Synthetic Polymer ◽

Magnetic Composites ◽

Interpolyelectrolyte Complex ◽

Hydrolysis Rates ◽

Poly Ethylene ◽

Noncovalent Binding

The enzyme-containing magnetic composites are presented. The magnetic matrix for enzyme immobilization is obtained by sequential application of an amine-containing polysaccharide—chitosan and a synthetic polymer—poly(ethylene-alt-maleic acid) to the magnetite microparticles to form the interpolyelectrolyte complex shell. Then, the enzyme (trypsin) is immobilized by covalent or noncovalent binding. Thus, the suggested composites can be readily obtained in the environmentally friendly manner. The enzyme capacity of the resulting composites reaches 28.0–32.6 mg/g. The maximum hydrolysis rates of the H-Val-Leu-Lys-pNA substrate provided by these composites range within 0.60·10–7–0.77·10–7 M/min.

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Thermal gravimetric analysis of in-situ crosslinked nanocellulose whiskers • poly(methyl vinyl ether-co-maleic acid) • polyethylene glycol

TAPPI Journal ◽

10.32964/tj10.4.29 ◽

2011 ◽

Vol 10 (4) ◽

pp. 29-33

Author(s):

LEE A. GOETZ ◽

AJI P. MATHEW ◽

KRISTIINA OKSMAN ◽

ARTHUR J. RAGAUSKAS

Keyword(s):

Thermal Stability ◽

Polyethylene Glycol ◽

Vinyl Ether ◽

Thermal Gravimetric Analysis ◽

Maleic Acid ◽

Gravimetric Analysis ◽

Thermal Gravimetric ◽

Methyl Vinyl ◽

Methyl Vinyl Ether

The thermal stability and decomposition of in-situ crosslinked nanocellulose whiskers – poly(methyl vinyl ether-co-maleic acid) – polyethylene glycol formulations (PMVEMA-PEG), (25%, 50%, and 75% whiskers) – were investigated using thermal gravimetric analysis (TGA) methods. The thermal degradation behavior of the films varied according to the percent cellulose whiskers in each formulation. The presence of cellulose whiskers increased the thermal stability of the PMVEMA-PEG matrix.

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