Unification of Botanical Science
نویسندگان
چکیده
منابع مشابه
History of botanical science
penetrate. I looked for the usual introduction on "How to use this book", and did not find it, until page 39. Equally, it takes a little searching to find out why a large section of the listed material is not actually reproduced in the book, but is on the microfiche. Finally, the coverage of countries is heavily towards Britain and North America, although this is only explained in one of the es...
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چکیده ندارد.
15 صفحه اولBotanical ratchets.
Ratcheting surfaces are a common motif in nature and appear in plant awns and grasses. They are known to proffer selective advantages for seed dispersion and burial. In two simple model experiments, we show that these anisotropically toothed surfaces naturally serve as motion rectifiers and generically move in a unidirectional manner, when subjected to temporally and spatially symmetric excitat...
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ژورنال
عنوان ژورنال: Nature
سال: 1944
ISSN: 0028-0836,1476-4687
DOI: 10.1038/153125a0