Linked Life Data

2610623

Source:http://linkedlifedata.com/resource/pubmed/id/2610623

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
1990-2-22
pubmed:abstractText
In order to characterize the functional cell surface, isoelectric points and elemental surface concentration, the ratios of nitrogen, oxygen and phosphorus to carbon of saliva-coated strains were determined by pH-dependent zeta potential measurements and X-ray photoelectron spectroscopy and compared with those of uncoated strains. The measurements of potential were carried out on completely hydrated cells, whereas the spectroscopy was on freeze-dried micro-organisms. The small increase in the nitrogen:carbon surface concentration ratio of saliva-coated streptococci in comparison to uncoated strains varied from 0.001 (Streptococcus mitis BA) to 0.029 (Streptococcus sanguis CH3) and was concurrent with an increase of the isoelectric point, ranging from 0.0 to 0.9. Increases in the oxygen:carbon ratio ranged from 0.006 (Strep. mitis BA) to 0.041 (Streptococcus mutans NS), whereas the phosphorus:carbon surface concentration ratio was unchanged after saliva treatment. Despite the fact that isoelectric and compositional measurements were made in different states of surface hydration, a decrease in the nitrogen:carbon ratio accompanied by an increase in oxygen:carbon ratio, was related to a decrease of the isoelectric point of the saliva-coated strains, and so analogous with previous observations for uncoated strains. Although there were changes in the physico-chemical properties of the strains upon saliva coating, all more or less kept their own surface identity despite adsorption of salivary constituents, possibly indicating some capacity to protect their own physico-chemical identity.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
D
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0003-9969
pubmed:author
pubmed:issnType
Print
pubmed:volume
34
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
889-94
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
A comparison between the elemental surface compositions and electrokinetic properties of oral streptococci with and without adsorbed salivary constituents.
pubmed:affiliation
Laboratory for Materia Technica, University of Groningen, The Netherlands.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't