Physics
Scientific paper
Mar 1965
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965gecoa..29..183r&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 29, Issue 3, pp.183-200
Physics
Scientific paper
Carbohydrate materials wore studied in aquatic plants, lake waters, and lake sediments of two eutrophic-alkalitrophic lakes of central Minnesota. Both free sedimentary sugars and sugars liberated on treatment with mineral acid were recovered. They were identified by specific reactions and by paper chromatography. Glucose, galactose, xylose and arabinose were the dominant sugars in order of decreasing abundance in aquatic plants of the two lakes. Maxima and minima in these sugars, as well as the content of cellulose and hemicellulose (determined by a colorimetric technique), show little relation to time of collection and appear to be a function of individual plant species. Evidence indicates that aquatic plants and algae are not the only important source of carbohydrates in lake sediments. Acid hydrolysis of near-surface lake bottom sediments gave rise to eight sugars, arabinose, xylose, galactose, glucuronic acid, glucose, rhamnose, mannose and ribose, in concentrations ranging from 19·1 to 0·1 mg/g of dry weight sediment. The variety and amount of these carbohydrate substances demonstrate the importance of microorganisms in altering the carbohydrate fraction prior to stabilization and preservation within the sediment. Acid hydrolysis of lake sediments from a deep core from Blue Lake, Minnesota, furnished in order of decreasing abundance the eight sugars, xylose, glucose, arabinose, galactose, mannose, rhamnose, ribose and glucuronic acid. Sucrose, glucose, mannose and xylose were recovered from Blue Lake waters as free sugars. Mannose and xylose have not previously been reported. Evidence was obtained for the presence of the free (sedimentary) sugars, maltose, sucrose, lactose, glucose, galactose, xylose and mannose in aqueous extracts of sediment. Mannose and lactose are previously unrecorded; however, this report of lactose needs to be confirmed by characterization. A natural stability series for carbohydrates in the lacustrine environment is: fairly stable: xylose, glucose, rhamnose, arabinose; moderately stable: ribose. mannose; fairly unstable: galactose; very unstable: glucuronic acid.
No associations
LandOfFree
Carbohydrates in aquatic plants and associated sediments from two Minnesota lakes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Carbohydrates in aquatic plants and associated sediments from two Minnesota lakes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carbohydrates in aquatic plants and associated sediments from two Minnesota lakes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-857302