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.
Experiments with a pilot spray drier showed that vacuoles in spray-powder particles originate from air bubbles. These are dispersed in the liquid during spraying, before actual atomization. During drying, the air bubbles expand as a result of gradual solidification of the droplet surface ('case hardening') before drying is complete. The vacuole volume is governed by the degree of air incorporation (related to type and design of atomizer and properties of the feed liquid) and the bubble expansion (related, for instance, to inlet air temperature).Vacuoles do not develop as a result of spontaneous boiling phenomena. Vacuole-free powders can be produced by replacing the air in the atomizer by steam.
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