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 104660
Title Physiologische symptomen van lage-temperatuur-bederf
show extra info.
door O. Banga
Author(s) Banga, O.
Publisher Gorinchem : Noorduyn
Publication year 1936
Description 152 p ill
Notes Proefschrift Wageningen
Tutors Sprenger, Prof. Ir. A.M.
Graduation date 1936-03-23
Dissertation no. 93
Author abstract show abstract
At a safe temperature (over 13_C) in a green fruit of tomato the acid content increases and the respiration quotient CO 2 /O 2 < 1. When the fruit colour changes from green to yellow and red, the acid content decreases suddenly and the respiration quotient quickly increases to CO 2 /O 2 >1.

At a harmful temperature (well below +12_C) acid content and respiration quotient of a green fruit behave normally during the first few days, but then the increase in acid stops and CO 2 /O 2 becomes one. In green tomatoes with low temperature breakdown acid very slowly decreases after return to a safe temperature instead of increasing, and CO 2 /O 2 is about 1 instead of < 1; with the (imperfect) colour change the sudden drop in acid is absent and CO 2 /O 2 is 1.

No indications for an abnormal sugar respiration were found.

From these results and from data in the literature a working hypothesis was made that low non-freezing temperature causes an irreversible physical change in the protoplasm of the tomato fruit, so that normal protein hydrolysis does not take place, and no amino acids become available to form organic acids by deamination.

Online full textINTERNET
On paper FORUM ; STACKS ; NN00319,24
FORUM ; STACKS ; NN08202,93
Keyword(s) (cab) storage disorders / cold injury / tomatoes / bananas / musa paradisiaca / solanum lycopersicum
Categories Plant Disorders and Nutrient Deficiencies
Publication type PhD thesis
Language Dutch; Flemish
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