ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
The sugars and acids of the spring sap from the Finnish birches Betula pendula Roth, B. pubescens Ehrh. and B. pendula var. carelica Mercklin were analyzed. The TMS-derivatives of the sugars and acids were analyzed by capillary GLC-MS. The qualitative compositions did not vary among species and varieties. In order of decreasing levels, the sugars (g · L−1) were glucose (2.5–4.7), fructose (2.3–4.5), sucrose (〈0.7), galactose (〈0.05) and the sugar alcohol myo-inositol (trace); acids were malic (0.1–0.7), succinic (〈0.1), citric (〈0.1), phosphoric (〈0.04), and fumaric (trace). The sugars indentified formed at least 99.5% of the total sugar content and the acids identified over 99% of the total acids. The citric, glycolic and fumaric acids as well as the sucrose were not always present in detectable amounts.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1985.tb13328.x
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