Topic
Methacrylic acid
About: Methacrylic acid is a research topic. Over the lifetime, 13058 publications have been published within this topic receiving 173201 citations. The topic is also known as: α-Methacrylic acid & 2-Methylacrylic acid.
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TL;DR: In this paper, a solution polymerization of 2-(perfluoro-(1,1-bis-isopropyl)-2-propenyl)oxyethyl methacrylate (POMA) with butyl acrylate, MA, and methacrylic acid (MAA) initiated by AIBN in the co-solvents of ethyl acetate, butyl alcohol and toluene was successfully prepared.
63 citations
Patent•
30 Apr 2009TL;DR: In this paper, a non-naturally occurring microbial organism having a 2-hydroxisobutyric acid, 3-hydroxyisoburacy acid or methacrylic acid pathway was provided.
Abstract: The invention provides a non-naturally occurring microbial organism having a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid pathway. The microbial organism contains at least one exogenous nucleic acid encoding an enzyme in a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid pathway. The invention additionally provides a method for producing 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid. The method can include culturing a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid producing microbial organism expressing at least one exogenous nucleic acid encoding a 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid pathway enzyme in a sufficient amount and culturing under conditions and for a sufficient period of time to produce 2-hydroxyisobutyric acid, 3-hydroxyisobutyric acid or methacrylic acid.
63 citations
TL;DR: In this article, a molecularly imprinted polymer (MIP) was ground and packed into a micro-column for selective solid phase extraction (SPE) of 2-aminopyridine from 20μl of sample solution.
63 citations
TL;DR: In this paper, a quantitative model of the gel swelling kinetics, coupled with the release of water from the gel, has been developed, which is in very good agreement with the experimental data.
Abstract: Dynamic swelling curves of copolymer hydrogels based on N-isopropylacrylamide (N-iPAAm) and methacrylic acid (MAA) under acidic medium exhibit a remarkable overshoot. This effect may be interpreted as the consequence of a swelling−deswelling process. The fundamental origin of this process is attributed to a reorganization of their own gel structures due to the hydrogen bond formation among the amide groups of N-iPAAm and the carboxyl groups of MAA in a hydrophobic environment. This fact, which may be considered as a cooperative physical cross-linking, leads to water expelling during the dynamic swelling measurements. A quantitative model of the gel swelling kinetics, coupled with the release of water from the gel, has been developed, which is in very good agreement with the experimental data. Some other overshooting phenomena from the literature may be also explained on the basis of a cooperative physical cross-linking process due to intermolecular forces among functional group moieties, promoted by the s...
62 citations
TL;DR: The thermo‐sensitive immunomicrospheres were successfully used for the immunoaffinity purification of anti‐BSA antibodies from antiserum and showed similar dependencies of CFC on temperature to the bare latex particles.
Abstract: Ultrafine magnetite particles were prepared by a co-precipitation method. The poly-(styrene/N-isopropylacrylamide/methacrylic acid) latex particles containing ultrafine magnetite [magnetic P(St/NIPAM/MAA)] were prepared by two-step emulsifier-free emulsion polymerization. The minimum NaCl concentration for flocculation of these magnetic latex particles (critical flocculation concentration, CFC) decreased with increasing temperature. These temperature dependence of CFC, namely its thermo-sensitivity, originated from NIPAM. At a certain NaCl concentration, some of the magnetic latex particles showed reversible transition between flocculation and dispersion by controlling the temperature, and the thermo-flocculated magnetic latex particles were separated quickly in a magnetic field. Bovine serum albumin (BSA) was covalently immobilized onto the magnetic P(St/NIPAM/MAA) latex particles with high efficiency by the carbodiimide method. These thermo-sensitive magnetic immunomicrospheres were effective for the immunoaffinity purification of anti-BSA antibodies from antiserum.
62 citations