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PolySeSouvient was founded by survivors of the Ecole Polytechnique massacre. [4]In 2019, the group called for a ban on semi automatic rifles, a ban on handgun imports to Canada, and a ban on handgun manufacturing in Canada. [5]
Polystyrene sulfonic acid, the acid whose salts are the polystyrene sulfonates, has the idealized formula (CH 2 CHC 6 H 4 SO 3 H) n. The material is prepared by sulfonation of polystyrene: (CH 2 CHC 6 H 5) n + n SO 3 → (CH 2 CHC 6 H 4 SO 3 H) n. Several methods exist for this conversion, which can lead to varying degree of sulfonation.
Caprolactam molecule used to synthesize Nylon 6 by ring opening polymerization. Nylon 6 or polycaprolactam is a polymer, in particular semicrystalline polyamide.Unlike most other nylons, nylon 6 is not a condensation polymer, but instead is formed by ring-opening polymerization; this makes it a special case in the comparison between condensation and addition polymers.
Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...
The outcome of this process was the adoption of Adam Langley's proposal for a variant of the original ChaCha20 algorithm (using 32-bit counter and 96-bit nonce) and a variant of the original Poly1305 (authenticating 2 strings) being combined in an IETF draft [5] [6] to be used in TLS and DTLS, [7] and chosen, for security and performance ...
Many different oxidants are used. Because of the redox reaction, the conductive form of polythiophene is a salt. An idealized stoichiometry is shown using the oxidant [A]PF 6: (C 4 H 2 S) n + 1/5n [A]PF 6 → (C 4 H 2 S) n (PF 6) 0.2n + 1/5 nA. In principle, PT can be n-doped using reducing agents, but this approach is rarely practiced. [8]
This quintet inspired Schubert to write his own string quintet in the same key (his scoring involves two cellos rather than two violas as in Mozart's quintet). The opening theme of Schubert's work retained many of the characteristics of Mozart's opening theme, such as decorative turns, irregular phrase lengths, and rising staccato arpeggios (the latter appear only in Schubert's recapitulation).
As a result of many years of favourable experience with this type of vehicle (the Prussian state railways had placed accumulator railcars in service as early as 1907 – these would later become Deutsche Reichsbahn's Class ETA 178) and an evaluation of the results obtained from the use of Class ETA 176 prototypes, DB placed 232 Class ETA 150 power cars and 216 of their associated Class ESA 150 ...