{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,11,12]],"date-time":"2023-11-12T05:25:08Z","timestamp":1699766708007},"reference-count":23,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2004,2,1]],"date-time":"2004-02-01T00:00:00Z","timestamp":1075593600000},"content-version":"vor","delay-in-days":10106,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Biopolymers"],"published-print":{"date-parts":[[1976,6]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The water\u2010soluble poly(1\u2010vinyl\u20102\u2010ethylimidazole) quaternized with ethyl bromide and lauryl bromide was prepared; lauryl group content, 8.8 mol% (L\u20109), 28.9 mol% (L\u201029), and 40.9 mol% (L\u201041). The \u03bb<jats:sub>max<\/jats:sub> value of methyl orange near 460 nm shifted to shorter wavelengths (417\u2013433 nm) in the aqueous solution of L\u201029 and L\u201041, and the intrinsic viscosity of L\u201029 was more than ten times smaller than that of L\u20109. The rate and equilibrium constants (<jats:italic>k<\/jats:italic><jats:sub>\u0192<\/jats:sub> and <jats:italic>K<\/jats:italic>) for addition of cyanide ion to the <jats:italic>N<\/jats:italic>\u2010substituted 3\u2010carboxamidopyridinium ions were studied at 30\u00b0C, where <jats:italic>N<\/jats:italic>\u2010substituents employed were <jats:italic>n<\/jats:italic>\u2010propyl, <jats:italic>n<\/jats:italic>\u2010hexyl, benzyl, 2,6\u2010dichlorobenzyl, and <jats:italic>n<\/jats:italic>\u2010lauryl. The kinetic parameters for <jats:italic>n<\/jats:italic>\u2010lauryl\u20103\u2010carboxamidopyridinium were markedly increased in the presence of L\u201029 and L\u201041 and with increasing polymer concentrations (84\u2010fold for <jats:italic>k<\/jats:italic><jats:sub>\u0192<\/jats:sub> and 7800\u2010fold for <jats:italic>K<\/jats:italic>), especially at low ionic strength, whereas L\u20109 decelerated the addition reaction. These distinct behaviors mean that L\u201029 and L\u201041 are classified as micellelike polymers and L\u20109 as a polyelectrolytelike polymer. However, L\u201029 depressed the rate of the forward reaction for benzyl\u20103\u2010carboxamidopyridinium, acting like a simple polyelectrolyte. Therefore, the polymer micelle can provide both the microenvironments characteristic of polyelectrolytes and micelles, depending on the hydrophobicity of substrates.<\/jats:p>","DOI":"10.1002\/bip.1976.360150609","type":"journal-article","created":{"date-parts":[[2004,12,31]],"date-time":"2004-12-31T04:51:43Z","timestamp":1104468703000},"page":"1129-1141","source":"Crossref","is-referenced-by-count":17,"title":["Coenzyme models. IV. Effect of polymer micelles on rate and equilibrium of addition of cyanide ion to <i>N<\/i>\u2010substituted 3\u2010carboxamidopyridinium ions"],"prefix":"10.1002","volume":"15","author":[{"given":"Seiji","family":"Shinkai","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Toyoki","family":"Kunitake","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2004,2]]},"reference":[{"key":"e_1_2_1_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0065-3160(08)60323-8"},{"key":"e_1_2_1_3_2","doi-asserted-by":"publisher","DOI":"10.1021\/ar50023a002"},{"key":"e_1_2_1_4_2","doi-asserted-by":"publisher","DOI":"10.1007\/978-94-010-2678-9_2"},{"key":"e_1_2_1_5_2","doi-asserted-by":"publisher","DOI":"10.1021\/j150519a013"},{"key":"e_1_2_1_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/j150539a016"},{"key":"e_1_2_1_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/j100826a027"},{"key":"e_1_2_1_8_2","doi-asserted-by":"publisher","DOI":"10.1007\/BF01500020"},{"key":"e_1_2_1_9_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo00929a034"},{"key":"e_1_2_1_10_2","doi-asserted-by":"publisher","DOI":"10.1021\/jo00958a011"},{"key":"e_1_2_1_11_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00778a037"},{"key":"e_1_2_1_12_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja00793a033"},{"key":"e_1_2_1_13_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja01494a026"},{"key":"e_1_2_1_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/bi00846a041"},{"key":"e_1_2_1_15_2","doi-asserted-by":"publisher","DOI":"10.1246\/bcsj.48.1914"},{"key":"e_1_2_1_16_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja01007a029"},{"key":"e_1_2_1_17_2","doi-asserted-by":"publisher","DOI":"10.1016\/0005-2787(65)90017-1"},{"key":"e_1_2_1_18_2","first-page":"558","volume-title":"Catalysis in Chemistry and Enzymology","author":"Jencks W. 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