Linked Life Data

21504159

Source:http://linkedlifedata.com/resource/pubmed/id/21504159

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2011-6-13
pubmed:abstractText
It was more than 50 years ago that an appearance of birefringence in alginate gels prepared under cation flow was reported for the first time, however, the anisotropic structure of the alginate gel has not been studied in detail. In the present study, anisotropic Ca-alginate gels were prepared within dialysis tubing in a high Ca(2+)-concentration external bath, and optical and small-angle X-ray scattering (SAXS) measurements were performed to characterize the structure of the gel. The observations of the gel with crossed polarizers and with circular polarizers revealed the molecular orientation perpendicular to the direction of Ca(2+) flow. Analyses of the SAXS intensity profiles indicated the formation of rod-like fibrils consisting of a few tens of alginate molecules and that the anisotropy of the gel was caused by the circumferential orientation of the large fibrils. From the observed asymmetric SAXS pattern, it was found that the axis of rotational symmetry of the anisotropic structure was parallel to the direction of Ca(2+) flow. The alignment factor (A(f)) calculated from the SAXS intensity data confirmed that the orientation of the fibrils was perpendicular to the direction of Ca(2+) flow.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
1526-4602
pubmed:author
pubmed:issnType
Electronic
pubmed:day
13
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2145-52
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
Anisotropic structure of calcium-induced alginate gels by optical and small-angle X-ray scattering measurements.
pubmed:affiliation
Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University , Kiryu, Japan. maki@chem-bio.gunma-u.ac.jp
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't