- About
-
The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 381 to 390 of 4763 (0.099 seconds)| 381 |
Biodegradability and oxygen uptake studies on resuspended estuarine bottom sedimentsTouhey, Robert James 24 October 1972 (has links)
A study was conducted to determine the oxygen uptake rate of
resuspended estuarine bottom sediments and the biodegradability of
the organic matter released during resuspension.
Oxygen uptake was measured on a Gilson Differential Respirometer
and the percent biodegradability was calculated by determining
the soluble organic carbon on a Beckman Carbonaceous Analyzer.
A preliminary study was conducted to determine if estuarine
sediments contained sufficient bacteria to exert a measurable oxygen
uptake or if additional bacterial seed was required. The oxygen uptake
rates of unseeded and seeded sediments were compared and the
results indicated that additional seeding was not necessary.
Another preliminary study was conducted to evaluate the effect
of storage time at 4°C on the oxygen uptake rate of resuspended
estuarine bottom sediments. The oxygen uptake rate of an homogenized sample was measared up to eight days after collection.
Results indicated that the oxygen uptake rate was not seriously
effected by storage at 4°C within the time interval tested.
Oxygen uptake rates and percent biodegradability of four
estuarine sediment samples were measured. The oxygen uptake
rates varied from 2 to 360 μl O₂/gram/hr. Percent biodegradability
was calculated from soluble organic carbon measurements and varied
from 10.4% to 81.0%. The volatile solids content of the sediment
and the soluble ferrous iron, free sulfide and sulfate concentrations
in the interstitial water were also measured. The data were statistically
analyzed for correlation between these parameters and the
oxygen uptake rate and percent biodegradability.
Experimental results indicated that the oxygen uptake rate was
directly related to both the volatile solids content of the sediment
and the soluble organic carbon released during resuspension. The
percent biodegradability of the carbonaceous material released during
resuspension of the sediments was found to be related to the soluble
organic carbon and the free sulfide concentration in the interstitial
water. / Graduation date: 1973
|
| 382 |
Rossby adjustment over a slopeAllen, Susan Elizaeth January 1988 (has links)
No description available.
|
| 383 |
The response of the ocean to a moving hurricaneGreatbatch, R. J. January 1981 (has links)
No description available.
|
| 384 |
The structure of the Rockall continental marginBarton, Abigail Jane January 1995 (has links)
No description available.
|
| 385 |
Hydrothermal plumes at the Mid-Atlantic RidgeRudnicki, Mark David January 1990 (has links)
No description available.
|
| 386 |
Oceanographic studies of the interaction between ice shelves and the seaPotter, J. R. January 1985 (has links)
No description available.
|
| 387 |
Velocities close to a bed of sand in oscillatory flowDu Toit, C. G. D. K. January 1980 (has links)
No description available.
|
| 388 |
Loquency waves in equatorial oceansKing, B. A. January 1985 (has links)
No description available.
|
| 389 |
Statolith growth lines and statocyst function in the cephalopodaMorris, Claude Conrad January 1988 (has links)
No description available.
|
| 390 |
Flandrian vegetational history and sea-level change of the Waveney ValleyAlderton, A. M. January 1983 (has links)
No description available.
|
Page generated in 0.1032 seconds