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 104424
Title Factoren die de variatie van het vitamine C in de plant bepalen
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door H.J. Mathot
Author(s) Mathot, H.J.
Publisher Wageningen : Veenman
Publication year 1945
Description VIII, 176 p
Series title Mededeelingen / Instituut voor Onderzoek op het Gebied van Verwerking van Fruit en Groenten. Reeks 1 (15)
Notes Proefschrift Wageningen
Tutors Sprenger, Prof. Ir. A.M.
Graduation date 1945-12-21
Dissertation no. 133
Author abstract show abstract
An attempt was made to explain the great variation in vitamin C content in garden crops, so that vitamin C content may be increased by altering the influencing factors. Ascorbic acid content (AA-ct) was estimated by titration with 2,6-dichlorophenolindophenol. Differences in AA-ct between plant varieties were attributed to polyfactorial genetic differences. Between the AA-ct's of (sub-units of) different genera no correlation with taxonomic order could be found.

AA-ct of rose hips was correlated to the ratio K: Ca: Mg in ash. At the green stage AA-ct was highest when none of the cationic ratios deviated from the average. The same held for the coloured hips, but with other averages (higher K%) and higher AA-ct's. The ideal curve of AA-ct during fruit development may be modified by the weather. A maximum usually occurred in ripe fruit. In leaves it varied with incident solar energy; dehydroascorbic acid showed the opposite course.

Growth substances strongly influenced both ascorbic acid and total vitamin C in the bark of cuttings and in germinating peas. After its formation from sugars, AA acts, particularly on chloroplast surfaces, as a transporter of H from chlorophyll. There it acts as a hydrogen donor and buffer.

Online full textINTERNET
On paper FORUM ; STACKS ; NN03726,1,15
FORUM ; STACKS ; NN08202,133
Keyword(s) (cab) plant composition / ascorbic acid / food / foods / vitamins / spices / stimulants
Categories Plant Composition
Publication type PhD thesis
Language Dutch; Flemish
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