Effects of water dispersions and water-soluble fractions of two crude and two processed oils on three marine algal species.

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dc.acquisition-srcen_US
dc.call-noQK934.M5en_US
dc.contract-noen_US
dc.contributor.authorMills, E.R., Jr.en_US
dc.contributor.otheren_US
dc.date.accessioned2010-02-15T17:20:00Z
dc.date.available2010-02-15T17:20:00Z
dc.date.issued1974en_US
dc.degreeen_US
dc.description95 p., Dissertationen_US
dc.description-otheren_US
dc.description.abstractThree marine algal species, Isochrysis galbana Parke (haptophyte), Glenodinium halli Freudenthal and Lee (dinoflagellate) and Cyclotella nana Hustedt (diatom) were exposed to the water-soluble fractions (WSF) and oil-in-water dispersions (OWD) of four American Petroleum Institute reference petroleums; a Kuwait crude, a South Louisiana crude, a #2 fuel oil and a Bunker C fuel oil. Tests were conducted in 72-hour static cultures and effects were noted by measuring changes in population growth rates and chlorophyll a levels. Infrared measurements were made to determine the actual dissolved petroleum levels in the WSF and values found were: Kuwait crude, 20 ppm; Lousiana crude, 15 ppm; #2 fuel oil, 10 ppm; and Bunker C, 10 ppm. The concentrations of the test materials (OWD and WSF) required to reduce growth rates and chlorophyll a levels to 50% of the same parameters in the untreated controls (EC50 level) indicated that the two refined products (#2 fuel oil and Bunker C oil) were more toxic then the two crude oils. Moreover, Kuwait crude appeared less toxic than Louisiana crude. The responses of the three test organisms were very similar to the four petroleum products. Subcultures of organisms from treated cultures showing marked reductions in growth rates after incubation in fresh medium for 6 to 7 days. The relative toxicity of the petroleum WSF was not apparently related to the dissolved hydrocarbon concentrations but rather to the enrichment of the aqueous phase with aromatic compounds, specifically the naphthalenes.en_US
dc.description.urihttp://gbic.tamug.edu/request.htmen_US
dc.geo-codeNorthwestern Gulf of Mexicoen_US
dc.historyen_US
dc.identifier.urihttp://hdl.handle.net/1969.3/23857
dc.latitudeen_US
dc.locationTAMUG circulating collection; GBIC Collection file roomen_US
dc.longitudeen_US
dc.notesen_US
dc.placeCollege Station, Texasen_US
dc.publisherTexas A&M University.en_US
dc.relation.ispartofseries519.00en_US
dc.relation.urien_US
dc.scaleen_US
dc.seriesen_US
dc.subjectalgaeen_US
dc.subjectaquatic plantsen_US
dc.subjectIsochrysis galbanaen_US
dc.subjectGlenodinium hallien_US
dc.subjectCyclotella nanaen_US
dc.subjectpollution effectsen_US
dc.subjectoil pollutionen_US
dc.subjectdiatomsen_US
dc.subjectdinoflagellatesen_US
dc.subjecttoxicityen_US
dc.subjectpetroleum hydrocarbonsen_US
dc.titleEffects of water dispersions and water-soluble fractions of two crude and two processed oils on three marine algal species.en_US
dc.typeBooken_US
dc.universityen_US
dc.vol-issueen_US

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