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Memorial University - Electronic Theses and Dissertations 1
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Document Description
TitleProduction of extracellular carbohydrates by the diatom, Cylindrotheca Fusiformis Reimann and Lewin var. Fusiformis
AuthorYoung, Kwan-shong
DescriptionThesis (M.Sc.) -- Memorial University of Newfoundland, 1968. Biology
Paginationiv, 79 leaves : ill.
SubjectDistomaceae; Diatoms; Carbohydrates
Degree GrantorMemorial University of Newfoundland. Dept. of Biology
NotesBibliography : leaves 68-74
AbstractThe production of extracellular carbohydrate has been studied in the diatom, Cylindrotheca fusiformis Reimann & Lewin var. fusiformis, in bacteria-free culture. The concentration of extracellular carbohydrates was found to increase as the light intensity was decreased. An increase was also observed in connection with nitrogen-deficient cultures. Experiments indicated that extracellular carbohydrate production did not parallel the growth of the diatom. Higher levels of carbohydrate production were found during the early stages of growth and during the post-exponential phases. Carbohydrate production drop to a low level during the exponential phase of growth. The carbohydrates identified by thin layer chromatography were found to be the low molecular weight compounds: glucose, galactose, arabinose, xylose and galacturonic acid. It is suggested that the production of most of the extracellular carbohydrate may possibly be due to diffusion and to passive release from dead cells.
Resource TypeElectronic resource or dissertation
FormatImage/jpg; Application/pdf
SourcePaper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier76006422
RightsThe author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
CollectionElectronic Theses and Dissertations
Scanning StatusCompleted
PDF File(23.02 MB) --
CONTENTdm file name252329.cpd