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Polyacrylamide (abbreviated as PAM or pAAM) is a polymer with the formula (-CH 2 CHCONH 2-). It has a linear-chain structure. PAM is highly water-absorbent, forming a soft gel when hydrated. In 2008, an estimated 750,000,000 kg were produced, mainly for water treatment and the paper and mineral industries. [1]
Synthetic polymers began replacing other chemical binders for soil stabilization in agriculture in the late 20th century. [1] Compared to traditional chemical binders, polymer soil additives can achieve the same amount of strengthening at much lower concentrations – for example, mixtures of 0.5-1% of various biopolymers have strength levels that match or exceed those of 10% cement mixtures ...
Pamela Price, a civil rights lawyer elected in 2022 on promises to reduce incarceration, expand restorative justice programs and prosecute police officers for misconduct. Read more: Endorsement ...
anionic polymerization: An ionic polymerization in which the kinetic-chain carriers are anions. [ 1 ] In polymer chemistry , anionic addition polymerization is a form of chain-growth polymerization or addition polymerization that involves the polymerization of monomers initiated with anions .
ASA emulsions are prepared like AKD dispersions with polycations as protective colloids and retention aids (especially with cationic starch [18] or cationic polyacrylamides (C-PAM) in the ratio ASA to cation of about 2: 1) and with about 1% anionic or nonionic surfactants.
Superabsorbent polymer powder. A superabsorbent polymer (SAP) (also called slush powder) is a water-absorbing hydrophilic homopolymers or copolymers [1] that can absorb and retain extremely large amounts of a liquid relative to its own mass.
Picture of an SDS-PAGE. The molecular markers (ladder) are in the left lane. Polyacrylamide gel electrophoresis (PAGE) is a technique widely used in biochemistry, forensic chemistry, genetics, molecular biology and biotechnology to separate biological macromolecules, usually proteins or nucleic acids, according to their electrophoretic mobility.
The synthesis of poly(N-isopropylacrylamide) began with the synthesis of the acrylamide monomer by Sprecht in 1956. [13]In 1957, Shearer patented the first application for what would be later identified as PNIPA for the use as a rodent repellent. [14]