Linked Life Data

20044126

Source:http://linkedlifedata.com/resource/pubmed/id/20044126

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
8
pubmed:dateCreated
2010-2-9
pubmed:abstractText
Humic acid-like substance (HA-like substance) extracted from maize plant residue at an yield of 81.1+/-4.9gkg(-1) of dry matter (dm) was tested for surfactant properties and ability to solubilise tetrachloroethene (PCE). Critical micelle concentration (CMC) of HA-like substance was detected to be 1986mgL(-1). Both, HA-like substance composition and average molecular weight [MW] affected CMC and a multiple linear regression model was proposed: CMC=12246-56.19 alkyl-C - 0.532MW (R(2)=0.90; P<0.01, n=7) where CMC was given in mgL(-1), alkyl-C was the percentage of total C, and MW was given in Da. Maize-HA-like substance solubilised PCE at the rate of 0.05g of PCE for each gram of maize-HA-like substance, which was 3.6-9.6 times lower than the data obtained in our earlier work using HA extracted from organic wastes, but was higher than that obtained with commercial HA from leonardite. Taking into consideration the two-site model of solubilisation of PCE in surfactant (i.e., solute partitioning into the micellar hydrophobic core and dissolution and/or binding into the hydrophilic non-ionic shell) and macromolecular composition of HA-like substance, the non-ionic hydrophile-alkyl lipophile balance was expected to control PCE solubilisation as the good multiple linear regression indicated: logK(dom)=-1.37+0.062 alkyl-C +0.055 O-alkyl-C (R(2)=0.93, P<0.05, n=6), where logK(dom) represents the micelle-water partitioning of PCE (mLg(-1)) and alkyl-C and O-alkyl-C represent the content of these two kinds of C detected by CP MAS (13)C NMR (as % of the total C).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1879-1298
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
78
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1017-22
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Surfactant properties and tetrachloroethene (PCE) solubilisation ability of humic acid-like substances extracted from maize plant and from organic wastes: a comparative study.
pubmed:affiliation
Gruppo RICICLA, Dipartimento di Produzione Vegetale, Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy. fabrizio.adani@unimi.it <fabrizio.adani@unimi.it>
pubmed:publicationType
Journal Article, Comparative Study