Effects of age on toxicity to freshwater algae of water soluble extracts of No. 2 fuel oil

Simple item page
dc.contributor.advisorWard, C. H.en_US
dc.contributor.committeeMemberFisher, Frank M.en_US
dc.contributor.committeeMemberTomson, Mason B.en_US
dc.creatorHsieh, Ying-Pingen_US
dc.date.accessioned2018-12-18T21:20:39Zen_US
dc.date.available2018-12-18T21:20:39Zen_US
dc.date.issued1979en_US
dc.description.abstractThe effects of fresh-prepared, 4-day-aged and 8-dayaged Ho. 2 fuel oil water soluble fractions on the growth of Selenastrum capricornutum were investigated. The freshprepared water soluble fraction inhibits both the growth rate and cell yield of S. capricornutum. Its toxicity decreases after four days but there is still residual toxicity. This residual toxicity decreases very slowly; the effects of the 8day-aged water soluble fraction on S. capricornutum are comparable with those of the 4-day-aged one. The components of the water soluble fractions were identified by a mass spectrometer interfaced to a gas chromatograph. The major components are aromatic compounds, of which, the benzene and indene derivatives volatilize '.very quickly. Naphthalene and methyl naphthalenes volatilize in four days. However, the di-aromatic and tri-aromatic compounds, having boiling points higher than naphthalene,are still in the medium after 8 days. Sixteen component compounds were chosen for chemical analysis and toxicity testing. The concentrations of these compounds in the fresh-prepared , 4-day-aged and 8-day-aged water soluble fractions were determined, and their toxicities were investigated by "algal lavra" technique. The concentration distribution test on the agarized medium shows that the concentrations of naphthalene and phenanthrene are comparable at a selected distance after diffusing in the medium for four days. The results indicate that methyl, dimethyl and trimethyl naphthalenes are more toxic than naphthalene. The most toxic compounds are dibenzofuran, fluorene, phenanthrene and dibenzothiophene, v/hich have high boiling points.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent56 ppen_US
dc.identifier.callnoThesis Biol. 1979 Hsiehen_US
dc.identifier.citationHsieh, Ying-Ping. "Effects of age on toxicity to freshwater algae of water soluble extracts of No. 2 fuel oil." (1979) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104303">https://hdl.handle.net/1911/104303</a>.en_US
dc.identifier.digitalRICE1935en_US
dc.identifier.urihttps://hdl.handle.net/1911/104303en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleEffects of age on toxicity to freshwater algae of water soluble extracts of No. 2 fuel oilen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentBiologyen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
RICE1935.pdf
Size:
2.28 MB
Format:
Adobe Portable Document Format
Download
Collections
Rice University Theses and Dissertations