منابع مشابه
Not so simple after all
Biologists have long thought that the internal workings of prokary otes—the smallest and simplest organisms, including bacteria—are well understood, and have accordingly consid ered eukaryotic organisms and their cells to be more fascinating objects for study. During the past decade, however, the focus of some research has begun to turn back to prokaryotes—particularly because genomic analyse...
متن کاملNot so simple after all
Biologists have long thought that the internal workings of prokary otes—the smallest and simplest organisms, including bacteria—are well understood, and have accordingly consid ered eukaryotic organisms and their cells to be more fascinating objects for study. During the past decade, however, the focus of some research has begun to turn back to prokaryotes—particularly because genomic analyse...
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Half a century ago, an immunologist named N. Avrion Mitchison showed that lymphocytes--then thought to be useless--triggered tumor rejection in mice.
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1208 The Ninetyeast (or East Indian) Ridge is one of the longest aseismic volcanic ridges in the World Ocean and one of the longest linear structures of the Earth. It is 200 km wide on average, and it extends in the merid ional direction via the entire eastern part of the Indian Ocean for almost 5000 km (Fig. 1). The ridge is dis tinctly expressed in the bottom topography from its intersection ...
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The construction of S-wave velocity models of marine sediments down to hundreds of meters below the seafloor is important in a number of disciplines. One of the most significant trends in marine geophysics is to use interface waves to estimate shallow shear velocities which play an important role in determining the shallow crustal structure. In marine settings, the waves trapped near the fluid–...
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ژورنال
عنوان ژورنال: Nature
سال: 1978
ISSN: 0028-0836,1476-4687
DOI: 10.1038/274533a0