Full Record Display for the EPA National Library Catalog

RECORD NUMBER: 298 OF 1307

OLS Field Name OLS Field Data
Main Title Effects of Divalent Metal Chlorides on Respiration and Extractable Enzymatic Activities of Douglas-Fir Needle Litter.
Author Spalding, Brian P. ;
CORP Author National Heart, Lung, and Blood Inst., Bethesda, MD.
Year Published 1979
Report Number EPA-600/J-79-109;
Stock Number PB81-106064
Additional Subjects Carbon dioxide ; Metals ; Fir trees ; Pollution ; Mercury(Metal) ; Cadmium ; Lead(Metal) ; Nickel ; Zinc ; Copper ; Chlorides ; Respiration ; Enzymes ; Reprints ; Pseudotsuga menziesii ; Water pollution effects(Plants)
Holdings
Library Call Number Additional Info Location Last
Modified
Checkout
Status
NTIS  PB81-106064 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 8p
Abstract The rates of CO2 evolution from Douglas-fir (Pseudotsuga menziesii Franco) needle litter, following application of divalent metal (Hg, Cd, Pb, Ni, Zn, and Cu) chlorides at rates of 10, 100, and 1,000 microgram/g and Ca chloride at 7, 68, and 683 microgram/g were monitored at 2- to 3-day intervals for 4 weeks; extractable enzymatic activities, were also measured on additional samples 1 day, 2, and 4 weeks following treatment. All metals except Pb inhibited respiration when applied at the highest level. Cellulase activity was depressed by treatment of 1,000 microgram/g of either Hg or Cd after 4 weeks but was not affected initially (1 day after). After 4 weeks, xylanese activity was also depressed by the 1,000-microgram/g Hg treatment. Apparently these enzymatic activities declined due to decrease enzyme synthesis associated with inhibited microbial growth rather than by direct enzymatic inhibition.
Supplementary Notes Pub. in Jnl. of Environmental Quality, v8 n1 p105-109 1979.
NTIS Title Notes Journal article.
Title Annotations Reprint: Effects of Divalent Metal Chlorides on Respiration and Extractable Enzymatic Activities of Douglas-Fir Needle Litter.
PUB Date Free Form 1979
Category Codes 2F; 68D; 48D
NTIS Prices PC A02/MF A01
Primary Description 600/02
Document Type NT
Cataloging Source NTIS/MT
Control Number 323786435
Origin NTIS
Type CAT