acid hydrolysis reaction of polyacrylamide and its

Acid hydrolysis reaction of polyacrylamide and its

Acidic hydrolysis of polyacrylamide: partial acidic conditions under the hydrolysis of PAM, the hydrolysis rate with temperature increased and pH decreased and accelerate (Note: acid can strengthen the PAM hydrolysis, but under acidic conditions of hydrolysis of PAM rate is alkaline hydrolysis much slower, so often need to under high temperature.

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hydrolysis of polyacrylamide and acrylic acid-acrylamide

Hydrolysis of polyacrylamide and acrylic acid-acrylamide

The hydrolysis of acrylamide-acrylic acid copolymers has been studied as a function of pH and of the initial composition of the samples. Our experimental results confirm the intramolecular catalysis by neighbouring undissociated carboxylate groups for 3 < pH < 5, as already demonstrated by Smets et al., and the catalysis of OH − ions with autoretarded kinetics for pH > 11.

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polyacrylamide degradation and its implications

Polyacrylamide degradation and its implications

High molecular weight (106–3 × 107 Da) polyacrylamide (PAM) is commonly used as a flocculant in water and wastewater treatment, as a soil conditioner, and as a viscosity modifier and friction

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hydrolysis of cationic polyacrylamide and its effect

Hydrolysis of cationic polyacrylamide and its effect

Hydrolysis of Cationic Polyacrylamide and its Effect on Flocculation of Ground Calcium Carbonate. Dongil Seo, Kyudeok Oh, Wanhee Im, and Hak Lae Lee * Cationic polyacrylamides (C-PAMs) have been widely used as flocculating agents to aggregate particles carrying negatively charged surfaces.

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transfer and degradation of polyacrylamide based

Transfer and degradation of polyacrylamide based

1 Title: Transfer and degradation of polyacrylamide based flocculants in hydrosystems: a review 2 3 Authors: A. G. Guezennec1, C. Michel1, K.Bru1, S. Touze1, N. Desroche2, I. Mnif3, M. Motelica-Heino4 4 1 BRGM 5 2 Nexidia SAS, 15 Rue de Mayence 21000 DIJON France 36 Université de Nice 7 4 ISTO, UMR 7327 CNRS-Université d’Orléans, 1A rue de la Férollerie, 45071 Orléans cedex 2

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polyacrylamide and its derivatives for oil recovery

Polyacrylamide and its derivatives for oil recovery

POLYACRYLAMIDE AND ITS DERIVATIVES FOR OIL RECOVERY By Zun Chen A DISSERTATION Presented to the Faculty of the Graduate School of the MISSOURI UNIVERSITY OF SCIENCE AND TECHNOLOGY In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY In CHEMISTRY 2016 Approved by Dr. Thomas P. Schuman, Advisor Dr. Baojun Bai, Co-advisor

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impact of anionic polyacrylamide on stability and surface

Impact of anionic polyacrylamide on stability and surface

The stability mechanism and thermal properties of the system alumina–anionic polyacrylamide (PAM) was studied. The polymer’s adsorption properties in dependence on the following parameters solution pH (in the range 3–9), temperature (in the range 15–35 °C), and carboxyl groups’ content in the PAM chains (in the range 5–30 %) were examined.

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synthesis and characterization of acrylamide-based anionic

Synthesis and Characterization of Acrylamide-Based Anionic

The copolymer of acrylamide (AM) and 2-acrylamido-2-methyl-1-propane sulfonic acid (AMPS) was synthesized through radical solution polymerization by potassium persulfate as initiator. By changing the AMPS feed ratio from 10 to 70%, and keeping other reaction conditions constant, different copolymers were synthesized. The techniques of Fourier transform infrared (FTIR) and nuclear magnetic

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impact of anionic polyacrylamide on stability and surface

Impact of anionic polyacrylamide on stability and surface

The stability mechanism and thermal properties of the system alumina–anionic polyacrylamide (PAM) was studied. The polymer’s adsorption properties in dependence on the following parameters solution pH (in the range 3–9), temperature (in the range 15–35 °C), and carboxyl groups’ content in the PAM chains (in the range 5–30 %) were examined.

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contribution to the adsorption mechanism of acetamide and

CONTRIBUTION TO THE ADSORPTION MECHANISM OF ACETAMIDE AND

OF ACETAMIDE AND POLYACRYLAMIDE ON TO CLAYS TT~. STUTZMANN and B. SIFFERT Centre de Recherches sur la Physico-Chimie des Surfaces Solides, 24, Avenue du President Kennedy, 68200 Mulhouse, France (Received 26 January 1977; and in final form 15 May 1977)

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acrylamide | c3h5no - pubchem

Acrylamide | C3H5NO - PubChem

Acrylamide is a colorless, odorless, crystalline amide that polymerizes rapidly and can form as a byproduct during the heating of starch-rich foods to high temperatures.Acrylamide is used in the production of polymers mainly in the water treatment industry, pulp and paper industry and textile treatment industry and is used as a laboratory reagent. . The polymer is nontoxic, but exposure to the

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the activity and characterization of acid phosphatases in

THE ACTIVITY AND CHARACTERIZATION OF ACID PHOSPHATASES IN

cultures but its activity was highest in the endophyte of E. hispidula. The wall- and membrane-bound acid phosphatase was the dominant fraction in the European endophytes. The extracellular acid phosphatase of high P-fed (323 mM P) mycelia of the endophyte of E. hispidula had the

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n-aminoethyl polyacrylamide as support for solid-phase

N-AMINOETHYL POLYACRYLAMIDE AS SUPPORT FOR SOLID-PHASE

N-AMINOETHYL POLYACRYLAMIDE AS SUPPORT FOR SOLID-PHASE France Received 1 April 1976 Original figures received 10 May 1976 1. Introduction The automatic sequencing of proteins starting from N-terminus by solid-phase technique should be performed following the same principles as for pep- mined by amino analysis after acid hydrolysis.

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aryl acylamidase activity of human serum albumin with o

Aryl acylamidase activity of human serum albumin with o

determining step of hydrolysis of this substrate is acylation. Materials and methods Chemicals Essentially fatty acid-free human serum albumin (FAF-HSA) . 96% pure and ,0.005% fatty acid, was from Sigma Chemical Co (Saint Quentin Fallavier, France). No further purification of FAF-HSA was carried out. o-NTFNAC was synthesized by

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frontiers | technological aspects of the production

Frontiers | Technological Aspects of the Production

Fructo- and galacto-oligosaccharides (FOS and GOS) are non-digestible oligosaccharides with prebiotic properties that can be incorporated into a wide number of products. This review details the general outlines for the production of FOS and GOS, both by enzymatic synthesis using disaccharides or other substrates, and by hydrolysis of polysaccharides. Special emphasis is laid on technological

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isolation and enzymic properties of secreted acetobacter

Isolation and enzymic properties of secreted Acetobacter

Its activity is optimal at pH5.0. It catalyses transfructosylation from sucrose to a variety of acceptors in-cluding water (sucrose hydrolysis), glucose (exchange reaction), fructan (polymerase reaction) and sucrose (oligofructoside synthesis). In vivo thepolymeraseactivity leads to synthesis ofa high-molecular-mass fructanofthelevantype. A

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acrylamide | c3h5no - pubchem

Acrylamide | C3H5NO - PubChem

Acrylamide is a colorless, odorless, crystalline amide that polymerizes rapidly and can form as a byproduct during the heating of starch-rich foods to high temperatures.Acrylamide is used in the production of polymers mainly in the water treatment industry, pulp and paper industry and textile treatment industry and is used as a laboratory reagent. . The polymer is nontoxic, but exposure to the

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the activity and characterization of acid phosphatases in

THE ACTIVITY AND CHARACTERIZATION OF ACID PHOSPHATASES IN

cultures but its activity was highest in the endophyte of E. hispidula. The wall- and membrane-bound acid phosphatase was the dominant fraction in the European endophytes. The extracellular acid phosphatase of high P-fed (323 mM P) mycelia of the endophyte of E. hispidula had the

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cloning and biochemical characterization of the fucanase

Cloning and biochemical characterization of the fucanase

The increased efficiency of FcnA on FC H+ indicates that the mild acid hydrolysis has likely removed some specific substituents, unmasking the sulfated fucan core structure and increasing the accessibility of fucanase to its substrate. For instance, mild acid hydrolysis has been reported to remove 2-sulfate esters at specific sites in the

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acyl transfer activity of an amidase from rhodococcussp

Acyl Transfer Activity of an Amidase from Rhodococcussp

The enantioselective amidase from Rhodococcus sp. strain R312 was produced in Escherichia coli and was purified in one chromatographic step. This enzyme was shown to catalyze the acyl transfer reaction to hydroxylamine from a wide range of amides. The optimum working pH values were 7 with neutral amides and 8 with α-aminoamides. The reaction occurred according to a Ping Pong Bi Bi mechanism.

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hydrolysis related publications

Hydrolysis Related Publications

Authors: A. G. Silva Sobrinho, G. M. Manzi, N. L. L. Lima, F. A. Almeida, V. Endo, N. M. B. L. Zeola, L. G. A. Cirne Abstract: We used 24 Ile de France lambs, weighing between 15 and 32 kg (BW). Treatments were supplemented with concentrate: “in nature” sugarcane (IN), sugarcane hydrolyzed using 0.6% calcium oxide (CaO) under aerobic condition (AER), and sugarcane hydrolyzed using 0.6% CaO

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n-aminoethyl polyacrylamide as support for solid-phase

N-AMINOETHYL POLYACRYLAMIDE AS SUPPORT FOR SOLID-PHASE

N-AMINOETHYL POLYACRYLAMIDE AS SUPPORT FOR SOLID-PHASE of reaction or the use of other chlorinating reagents do not improve the reaction yield. The aminated resin (300-500 mg) was added to the reaction mixture and the suspension maintained mined by amino analysis after acid hydrolysis.

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isolation and enzymic properties of secreted acetobacter

Isolation and enzymic properties of secreted Acetobacter

Its activity is optimal at pH5.0. It catalyses transfructosylation from sucrose to a variety of acceptors in-cluding water (sucrose hydrolysis), glucose (exchange reaction), fructan (polymerase reaction) and sucrose (oligofructoside synthesis). In vivo thepolymeraseactivity leads to synthesis ofa high-molecular-mass fructanofthelevantype. A

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us20100196302a1 - keratin hydrolysates, process for their

US20100196302A1 - Keratin Hydrolysates, Process for Their

This present invention provides a process for keratin hydrolysis by means of microbiological and/or enzymatic processes. In particular, the keratin is derived from feathers of animals, such as chicken and are submitted to hydrolysis by a strain of Bacillus sp. The hydrolysates have molecular weight lower than 500 Da, which makes them ideal for cosmetic applications, particularly for

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the activity and characterization of acid phosphatases in

THE ACTIVITY AND CHARACTERIZATION OF ACID PHOSPHATASES IN

cultures but its activity was highest in the endophyte of E. hispidula. The wall- and membrane-bound acid phosphatase was the dominant fraction in the European endophytes. The extracellular acid phosphatase of high P-fed (323 mM P) mycelia of the endophyte of E. hispidula had the

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acyl transfer activity of an amidase from rhodococcussp

Acyl Transfer Activity of an Amidase from Rhodococcussp

The enantioselective amidase from Rhodococcus sp. strain R312 was produced in Escherichia coli and was purified in one chromatographic step. This enzyme was shown to catalyze the acyl transfer reaction to hydroxylamine from a wide range of amides. The optimum working pH values were 7 with neutral amides and 8 with α-aminoamides. The reaction occurred according to a Ping Pong Bi Bi mechanism.

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us5128420a - method of making hydroxamic acid polymers

US5128420A - Method of making hydroxamic acid polymers

A method for preparing hydroxamic acid polymers from primary amide polymers wherein polyvinyl monomers such as polyacrylamide are reacted with hydroxyl amine in aqueous solution at room temperature. The low reaction temperature is crucial to producing a high yield (70%) of polymer with hydroxamic acid groups and having a low carboxylic acid content (less than 15%, preferably less than 3%).

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a standardised semi-dynamic in vitro digestion method

A standardised semi-dynamic in vitro digestion method

A standardised semi-dynamic in vitro digestion method suitable for food – an international consensus†. Ana-Isabel Mulet-Cabero a, Lotti Egger b, Reto Portmann b, Olivia Ménard c, Sébastien Marze d, Mans Minekus e, Steven Le Feunteun c, Anwesha Sarkar f, Myriam M.-L. Grundy g, Frédéric Carrière h, Matt Golding i, Didier Dupont c, Isidra Recio j, André Brodkorb k and Alan Mackie * f a

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structure and anticoagulant activity of a fucosylated

Structure and Anticoagulant Activity of a Fucosylated

The reaction mixtures were as described in the legend of Fig. 12, except that various concentrations of fucosylated chondroitin sulfate (fucCS) (•), sulfated fucose released by partial acid hydrolysis (see Fig. 1) of the fucosylated chondroitin sulfate ( ), or fucosylated chondroitin sulfate plus a fixed concentration of sulfated fucose (100

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us20100196302a1 - keratin hydrolysates, process for their

US20100196302A1 - Keratin Hydrolysates, Process for Their

This present invention provides a process for keratin hydrolysis by means of microbiological and/or enzymatic processes. In particular, the keratin is derived from feathers of animals, such as chicken and are submitted to hydrolysis by a strain of Bacillus sp. The hydrolysates have molecular weight lower than 500 Da, which makes them ideal for cosmetic applications, particularly for

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lipid peroxidation in cotton: xanthomonas interactions

Lipid peroxidation in cotton: Xanthomonas interactions

The extract (0.5 ml) was incubated for 20 min at 25°C with 1 ml 250 m m sodium phosphate buffer (pH 7) and 5 µl of an ethanolic solution of linoleic acid (100 m m). The LOX reaction was stopped by addition of 70 µl HClO 4 (12 n), and hydroperoxy fatty acids were extracted in 2 ml hexane. After vigorous shaking, the absorbance at 234 nm of

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characterization of a new α-l-fucosidase isolated from the

Characterization of a new α-l-fucosidase isolated from the

Hydrolysis of fucose from fucoidan catalyzed by the α-l-fucosidase. A.nodosum fucoidan (60 mg) was incubated in 5 ml of 50 mM acetate buffer, pH 5, at 40°C with fucosidase alone (0.5 U) (diamonds) or with both fucosidase and sulfatase (0.5 U each) (squares). Controls corresponded to incubation of fucoidan alone (x’s) or in presence of

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