منابع مشابه
Synthesis and Bioactivity of a Cyclopolypeptide from Caribbean Marine Sponge
Synthesis of a natural proline-rich cyclopolypeptide - rolloamide A [8] was carried out by coupling of tri- and tetrapeptide units Boc-Phe-Pro-Val-OMe and Boc-Pro-Leu-Pro-Ile-OMe after proper deprotection at carboxyl and amino terminals using carbodiimide chemistry in alkaline environment followed by cyclization of linear heptapeptide segment in the presence of base. The structure of synthesize...
متن کاملA sharper view of impact craters from clementine data.
The ultraviolet-visible camera on the Clementine spacecraft obtained high-spatial resolution images of the moon in five spectral channels. Impact craters mapped with these multispectral images show a scale of lithologic diversity that varies with crater size and target stratigraphy. Prominent lithologic variations (feldspathic versus basaltic) occur within the south wall of Copernicus (93 kilom...
متن کاملSpectral Mapping of Mare Mosciviense, Lunar Farside, from Clementine Uvvis
Background: The Clementine mission provided the first high resolution mul-tispectral image data set of the far side of the Moon. While near side surface morphological units have been studied extensively from earth based spectral measurements, this is the first opportunity to examine the compositional properties of far side areas. Moscoviense is one of the prominent large impact basins on the lu...
متن کاملMeasurement and Analysis of Lunar Basin Depths from Clementine Altimetry
Moon’s early evolution (Safronov 1972, Kaula 1979). The geometries and subsurface structures of large impact basins Altimetric profiles from the Clementine LIDAR are used to calculate the depths of 29 large craters and basins on the Moon. preserve a record of the mechanics of impact, the nature Plotting the depths of the best preserved structures together of basin modification, and the thermal ...
متن کاملSynthesis and Bioactivity of a Cyclopolypeptide from Caribbean Marine Sponge
Synthesis of a natural proline-rich cyclopolypeptide - rolloamide A [8] was carried out by coupling of tri- and tetrapeptide units Boc-Phe-Pro-Val-OMe and Boc-Pro-Leu-Pro-Ile-OMe after proper deprotection at carboxyl and amino terminals using carbodiimide chemistry in alkaline environment followed by cyclization of linear heptapeptide segment in the presence of base. The structure of synthesize...
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ژورنال
عنوان ژورنال: Nature
سال: 2000
ISSN: 0028-0836,1476-4687
DOI: 10.1038/35000671