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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 104228
Title Polyphosphate formation in Chlorella in relation to photosynthesis
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door Josephus Franciscus Gerardus Maria Wintermans
Author(s) Wintermans, J.F.G.M.
Publisher Wageningen : Veenman
Publication year 1955
Description VIII, 58 p
Notes Proefschrift Wageningen  show all notes
Ook verschenen als: Mededelingen van de Landbouwhogeschool te Wageningen, 55(2)
Ook verschenen als handelsuitgave
Tutors Wassink, Prof. Dr. E.C.
Graduation date 1955-06-17
Dissertation no. 196
Author abstract show abstract
Suspensions of Chlorella converted orthophosphate into cellular phosphate in the light, especially in the absence of C0 2 , when orthophosphate was largely transformed into polyphosphate. Polyphosphate formation continued for several hours, slowly decreasing, and was saturated at much lower light intensities than photosynthesis with 5 % C0 2 . It was maximum at about pH 4, decreasing to zero at pH 7-8. It was not affected by anaerobic conditions and nitrate, but decreased with glucose.

Phenylurethane inhibited polyphosphate formation less than photosynthesis, and in the light-limiting range only. Light saturation was reached at higher intensities.

DNP inhibited photosynthesis and polyphosphate formation to the same extent at all light intensities, and most strongly at low intensities. Sodium azide and NaF inhibited both processes about equally.

Probably high-energy phosphate was formed in light, and transferred to polyphosphate when photosynthesis was curtailed by lack of C0 2 . Glucose may also compete for this high-energy phosphate.

With C0 2 phosphate fixation yielded more stable products, and showed different sensitivity to inhibitors.

Dark fixation required oxygen and was especially sensitive to DNP but less so to glucose and other inhibitors.

Slow decomposition of polyphosphate and release of orthophosphate occurred in darkness under nitrogen.

Online full textINTERNET
On paper FORUM ; STACKS ; NN08202,196
Keyword(s) (cab) photosynthesis
Categories Photosynthesis
Publication type PhD thesis
Language English
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