{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T18:47:02Z","timestamp":1783536422218,"version":"3.55.0"},"reference-count":41,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2024,5,7]],"date-time":"2024-05-07T00:00:00Z","timestamp":1715040000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100002241","name":"Japan Science and Technology Agency","doi-asserted-by":"publisher","award":["AS2915173U"],"award-info":[{"award-number":["AS2915173U"]}],"id":[{"id":"10.13039\/501100002241","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Gels"],"abstract":"<jats:p>Sacran is a supergiant cyanobacterial polysaccharide that forms mesogenic supercoil rods that exhibit liquid crystalline (LC) gels at deficient concentrations of around 0.5 wt%, and has several bioactive stimuli-responsive functions. Here, we attempted to form oriented microfibers of sacran by electrospinning, following structural analyses of the sacran rods. A heterogeneous acid-hydrolysis method using a protonated cation-exchange resin was adopted to examine the short-time exposition of concentrated acid to sacran rods. From the supernatant, the oligomeric fraction that was soluble in water and methanol was isolated. The oligomeric fraction had a main sugar ratio of \u03b1-Glc:\u03b2-Glc:\u03b1-Xyl:\u03b2-Xyl:\u03b1-Rha of 2:5:1.5:1.5:4 (Glc:Xyl:Rha = 7 (=4 + 3):3:4), and it was speculated that the sacran structure includes rhamnoglucan and xyloglucan (4:3), which are generally rigid enough to exhibit LC. To make oriented microfibers of LC sacran, solubility testing was performed on sacran to find good new solvents of polyhydroxy alcohols such as ethylene glycol, 1,2-propanediol, and glycerol. The oriented film was prepared from a sacran aqueous solution where calcium compound particles deposited on the film are different from polyhydroxy alcohol solutions. Although sacran could not form microfibers by itself, polymer composite microfibers of sacran with poly(vinyl alcohol) were prepared by electrospinning. Cross-polarizing microscopy revealed the molecular orientation of the microfibers.<\/jats:p>","DOI":"10.3390\/gels10050321","type":"journal-article","created":{"date-parts":[[2024,5,8]],"date-time":"2024-05-08T03:23:19Z","timestamp":1715138599000},"page":"321","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Structural Analyses of Polysaccharides Extracted from Cyanobacterial Extracellular Gels and Oriented Liquid Crystalline Microfiber Processing by Poly(vinyl alcohol)-Assisted Electrospinning"],"prefix":"10.3390","volume":"10","author":[{"given":"Chizu","family":"Mitani","sequence":"first","affiliation":[{"name":"Graduate School of Advanced Science and Technology, JAIST, Nomi 923-1292, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maiko","family":"Okajima","sequence":"additional","affiliation":[{"name":"Graduate School of Advanced Science and Technology, JAIST, Nomi 923-1292, Japan"},{"name":"Key Laboratory of Synthetic and Biological Colloids, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tomomi","family":"Ohashira","sequence":"additional","affiliation":[{"name":"Graduate School of Advanced Science and Technology, JAIST, Nomi 923-1292, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mohammad Asif","family":"Ali","sequence":"additional","affiliation":[{"name":"Graduate School of Advanced Science and Technology, JAIST, Nomi 923-1292, Japan"},{"name":"Key Laboratory of Synthetic and Biological Colloids, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Toshiaki","family":"Taniike","sequence":"additional","affiliation":[{"name":"Graduate School of Advanced Science and Technology, JAIST, Nomi 923-1292, Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9794-083X","authenticated-orcid":false,"given":"Tatsuo","family":"Kaneko","sequence":"additional","affiliation":[{"name":"Graduate School of Advanced Science and Technology, JAIST, Nomi 923-1292, Japan"},{"name":"Key Laboratory of Synthetic and Biological Colloids, School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,5,7]]},"reference":[{"key":"ref_1","first-page":"121","article-title":"Novel findings in carrageenans, agaroids and \u201chybrid\u201d red seaweed galactans","volume":"4","author":"Stortz","year":"2000","journal-title":"Curr. 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