Library Catalogue

Library Catalogue

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    Union Catalogue of Agricultural Libraries in the Netherlands

    The WUR Library Catalogue contains bibliographic data on books and periodicals held by the libraries of Wageningen University and Research Centre and some 15 associated libraries. Holding data are added to each record.

    Subjects covered include Agrotechnology, Food and Food Production, Plant and Animal Sciences, Soil Science, Geo-information, Landscape and Spatial Planning, Water and Climate, Ecosystem Studies, Economics and Society.

    The joint collections of the participating libraries cover a substantial part of the internationally available scientific literature in these disciplines.

    As far as Dutch scientific literature in these fields is concerned, coverage can be considered near 100%, including much of the so-called "grey literature".

    All titles are entered in their original language. Keywords are added to facilitate subject searching.

    The database is updated every day and now contains over 830.000 records.

Record number 104250
Title Het cyanophore karakter van witte klaver (Trifolium repens L.)
show extra info.
door D. de Waal
Author(s) Waal, D. de
Publisher Wageningen : Veenman
Publication year 1942
Description VI, 135 p
Notes Proefschrift Wageningen
Tutors Mayer Gmelin, Prof. Ir. H.K.H.A. ; Tendeloo, Prof. Dr. H.J.C.
Graduation date 1942-07-06
Dissertation no. 122
Author abstract show abstract
The positive correlation found in New Zealand between quality of white clover and its hydrocyanic acid content, could not be confirmed for Dutch white clover in the Netherlands. HCN occurred bound to an incompletely identified glucoside. As Weevers and Treub et al. found the glucoside and HCN contents varying in other plants during the day, the author tried to find out whether similar variations occur in the 1ICN content of white clover. The bromometric method of Schulek was modified so that 1ICN was titrable at a definitely alkaline pH (instead of acid or neutral). The experimental plants were grown under close control: constant illumination, and, within limits, usually constant temperature and air humidity.

HCN in Dutch and New Zealand white clover increased rather sharply after sunrise, reaching a maximum rather soon (e.g. after 4 h), then decreasing. This variation only occurred if the weather conditions of the successive days were much alike. Otherwise it was disturbed, often with a second maximum after noon. A maximum must be assumed for the night also. At least 50 leaves must be analysed.

These and other results seemed sufficient to start breeding research on HCN content in the Netherlands.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,122
Keyword(s) (cab) trifolium repens / botany
Categories Grassland Improvement / Forage Legumes
Publication type PhD thesis
Language Dutch; Flemish
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