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The transition to the rigid strained objects is continuous and steeper for cycles. Circular macromolecules of contour length equal to \u22485 persistence lengths are characterized as rigid strained objects with a lowered spatial dimensionality. The coil regime is almost omitted in the static structure factor already for semiflexible chains of both architectures and the flattening of stiffer cycles is evidenced by oscillations superimposed on the rod\u2010like behavior of corresponding linear chains. The orientational correlation function shows qualitative difference in behavior of cyclic and linear chains.\n<jats:boxed-text content-type=\"graphic\" position=\"anchor\"><jats:graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mimetype=\"image\/jpeg\" position=\"anchor\" specific-use=\"enlarged-web-image\" xlink:href=\"graphic\/mgra001.jpg\"><jats:alt-text>magnified image<\/jats:alt-text><\/jats:graphic><\/jats:boxed-text><\/jats:p>","DOI":"10.1002\/mats.201000047","type":"journal-article","created":{"date-parts":[[2010,12,8]],"date-time":"2010-12-08T16:31:43Z","timestamp":1291825903000},"page":"65-74","source":"Crossref","is-referenced-by-count":9,"title":["Stiffening Transition in Semiflexible Cyclic 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