Wilfried Thien

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Mustard (Sinapis alba L.) seedlings were grown in the presence of herbicides (Difunon, Norflurazon) which inhibit carotenoid synthesis without affecting development, in darkness or in continuous far-red light. In strong white light (12,000 lx) the cotyledons of the herbicide-treated seedlings did not contain normal chloroplasts, but only small(More)
In 2002, the third Public Health Status and Forecasts report was published, containing up-to-date information about Dutch public health and health care. A striking finding was that although life expectancy (LE) in The Netherlands increased between 1980 and 2000, the LE of men is rising less rapidly than the European Union (EU) average. The LE of Dutch women(More)
Light stimulates the accumulation of cytoplasmic and plastid rRNA in the cotyledons of mustard (Sinapis alba L.) seedlings. This effect is mediated by phytochrome. Continuous far red irradiation and brief red light pulses (the effect of which is reversible by brief far red light pulses) increase the amount of 1.3 x 10(6) + 0.7 x 10(6) and 1.1 x 10(6) + 0.56(More)
The influence of phytochrome (high irradiance reaction; operationally, continuous far red light) on the incorporation of [(3)H]uridine into the cytoplasmic 2.5 megadalton precursor rRNA in the cotyledons of mustard (Sinapis alba L.) seedlings has been investigated. After irradiating 36-hour-old etiolated seedlings with 12 hours of far red light, the rate of(More)
Cotyledons of mustard (Sinapis alba L.) seedlings irradiated with far-red light were shown to synthesize high molecular weight precursor rRNA (2.4×106–2.9×106 dalton) at a considerably enhanced rate compared to dark-grown cotyledons. This result was obtained by pulse-labelling cotyledons isolated from 48 h old seedlings (which were either irradiated for 12(More)
In the course of a thesis submitted for a diploma degree within the Fachhochschule Oldenburg the Serengeti Safaripark was surveyed in autumn and winter 1996/97 laying in the planning foundations for the application for licences from the controlling authorities. Taking into consideration the special way of keeping animals in the Serengeti Safaripark (game(More)
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