OLS : Record


Main Title A Flow-through testing procedure with duckweed (Lemna minor L.) /
Author Walbridge, Charles T.
CORP Author Environmental Research Lab.-Duluth, Minn.
Publisher Environmental Research Laboratory--Duluth,
Place Published Duluth, Minn.
Year Published 1977
Report Number EPA; EPA 600/3-77-108
Stock Number PB-272 586
OCLC Number 28372599
Subjects Aquatic weeds; Water pollution; Water quality; Indicator species; Bioassay; Toxicity; Nutrition; Growth; Plant physiology; Mortality; Ecology; Aquatic plants; Lemna minor; Duckweed; Bioindicators; Laboratory experiments
Subject Added Ent Duckweeds.; Lemnaceae
Internet Access
Description Access URL
Library   Call Number Additional Info Location Date Modified
EJAD EPA 600/3-77-108 Region 3 Library/Philadelphia, PA 10/25/1996
EJBD ARCHIVE EPA 600-3-77-108 Headquarters Library/Washington,DC 09/12/2011
EJBD EPA 600-3-77-108 c.1 Headquarters Library/Washington,DC 01/29/2014
EKAM EPA 600/3-77-108 Region 4 Library/Atlanta,GA 05/13/1994
ELDD EPA-600/3-77-108 3 copies NHEERL/MED Library/Duluth,MN 10/25/2002
ESAD EPA 600-3-77-108 Region 10 Library/Seattle,WA 03/23/2010
NTIS PB-272 586 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation vi, 20 pages : illustrations ; 28 cm
Abstract Lemna minor is one of the smallest flowering plants. Because of its floating habit, ease of culture, and small size it is well adapted for laboratory investigations. Procedures for flow-through tests were developed. Testing procedures were developed with this apparatus. By using the techniques described here, the effects of nutrients or toxicants, singly or in combination, can be determined in several concentrations with several replicates of each. Responses which can be measured include changes in growth rate, changes in death rate, changes in timing of division of colonies, color changes, changes in variability, and modification of the flowering response. Emphasis here is on changes in growth rate determined either by daily frond counts or by final frond numbers.
Notes "EPA-600/3-77-108." "September 1977." Includes bibliographical references (pages 17-19).
Title Ser Add Ent United States. Environmental Protection Agency ; EPA-600/3-77-108.
PUB Date Free Form 1977
NTIS Prices PC A03/MF A01
BIB Level m
Medium unmediated
OCLC Time Stamp 20141030095225
Cataloging Source OCLC/T
Language eng
SUDOCS Number EP 1.23:600/3-77-108
Origin OCLC
OCLC Rec Leader 01061cam 2200301Ia 45020