Linked Life Data

18761150

Source:http://linkedlifedata.com/resource/pubmed/id/18761150

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2008-9-1
pubmed:abstractText
This study investigated lipid-protein LB film formation with Brewster angle microscopy. Our experimental results show that hemoglobin (Hb) molecules can enter the lipid layer and remain for an extended time. We investigated the KCl effect on the LB monolayer of lipid-protein. The lipid-Hb monolayer was transferred from the air-water interface to a QCM gold electrode. UV-vis spectra showed that Hb retained its natural structure in the lipid layer. Cyclic voltammetric (CV) and amperometric systems were applied in this study in order to confirm the remaining bioactivity and sensitivity of Hb to hydrogen peroxide (H(2)O(2)). Lipid-Hb-modified electrodes showed well-defined redox peaks, indicating that the direct electron transfer between Hb and the electrode was enhanced by Hb incorporated in lipid layer. Based on this phenomenon, a novel biosensor for H(2)O(2) was designed. Experimental conditions influencing the biosensor performance such as pH, and potential were optimized and assessed. The levels of the R.S.D.'s (<5%) for the entire analyses reflected the highly reproducible sensor performance. Using optimized conditions the linear range for the detection of H(2)O(2) was observed from 1 x 10(-6) to 1.00 x 10(-4) molL(-1) with a detection limit of 4.00 x 10(-7) molL(-1) (based on the S/N=3).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1873-3573
pubmed:author
pubmed:issnType
Electronic
pubmed:day
15
pubmed:volume
76
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1029-34
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Brewster angle microscopic study of mixed lipid-protein monolayer at the air-water interface and its application in biosensing.
pubmed:affiliation
Department of Electrical Engineering & NTRC, Dong-A University, 840 Hadan-2dong, Saha-gu, Busan 604-714, Republic of Korea.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't