| Main Title |
Structural Features Associated with Degradable and Persistent Chemicals. |
| Author |
Niemi, G. J. ;
Veith, G. D. ;
Regal, R. R. ;
Vaishnav, D. D. ;
|
| CORP Author |
Environmental Research Lab.-Duluth, MN. ;Minnesota Univ.-Duluth. ;Wisconsin Univ.-Superior. Center for Lake Superior Environmental Studies. |
| Year Published |
1987 |
| Report Number |
EPA/600/3-87/219; |
| Stock Number |
PB88-170634 |
| Additional Subjects |
Toxicology ;
Chemical compounds ;
Reprints ;
Biodegradeable ;
Residues ;
Biochemical oxygen demand ;
Multivariate statistical analysis
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB88-170634 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
15p |
| Abstract |
A multivariate statistical method and a heuristic method were employed to examine the structural features associated with the persistence of degradation of 287 chemicals tested with the standard biochemical oxygen demand(BOD) procedure. The data base consisted of 196 'degradable' chemicals with a half-life of less than 15 d (e.g., Theoretical BODs (ThOD) > 16%) and 91 'persistent' chemicals with a half-life of more than 15 d. The multivariate statistical analysis consisted of (1) calculating 54 molecular connectivity indices, five physicochemical properties and eight principal components from the molecular connectivity indices, (2) clustering the chemicals on the basis of the principal components and one of the physicochemical properties, K(ow) and (3) discriminating between persistent and degradable chemicals using the molecular connectivity indices and the physicochemical properties as discriminating variables within each cluster. The heuristic approach used the results of the multivariate analyses and the literature on biodegradation to identify a series of structural features associated with degradable and persistent chemicals. |
| Supplementary Notes |
Pub. in Environmental Toxicology and Chemistry, v6 p515-527 Jul 87. Prepared in cooperation with Minnesota Univ.-Duluth, and Wisconsin Univ.-Superior. Center for Lake Superior Environmental Studies. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Structural Features Associated with Degradable and Persistent Chemicals. |
| PUB Date Free Form |
c1987 |
| Category Codes |
57Y |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/03 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
812722498 |
| Origin |
NTIS |
| Type |
CAT |
