Michel Grün

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Classical silica technology has reached its limit with respect to an ultimate minimum particle size of about 2 microm in diameter. Here, a novel process is presented which allows one to synthesize porous silica beads and control their particle diameter in situ, within the range of 0.2-2.0 microm. As a result, no sizing is required and losses of silica are(More)
Conversion of d-[5-(3)H,6-(14)C]glucose to l-ascorbic acid in detached apices of Pelargonium crispum (L.) L'Hér cv Prince Rupert (lemon geranium) was accompanied by complete loss of tritium in the product. Chemical degradation of d-glucose which was recovered from the labeled apices yielded d-glyceric acid (corresponding to carbons 4, 5, and 6 of glucose)(More)
Water relations in the leaves of beech trees on sandstone-derived soil are supported by the presence of white fir neighbors. Climate extremes such as heat waves and prolonged periods of drought not only affect water relations of trees, but can also accelerate nitrogen (N) limitation under low soil N. To counteract these effects of climate change, it has(More)
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