منابع مشابه
Nanophase Iron Globules in Lunar Soil
Introduction: Micrometeoritic impacts on lunar soils produce melt and vapor [1]. A patina of condensed vapor is deposited on lunar grains [2], the melt forms agglutinitic glass [3]. In lunar soils, agglutinitic glass and rinds of grains host submicron-sized globules of pure Fe (Fe-rich globules larger than 1 micron usually contain other elements such as Ni, P, and S). Observation and measuremen...
متن کاملMolten globules
When were they discovered? As early as the 1960s, there was evidence that under certain conditions protein molecules might have properties intermediate between the rigid native and fully unfolded states. The concept of such a protein as an intermediate in protein folding was suggested by the late Oleg Ptitsyn in the 1970s. A compact, partly folded protein was first observed experimentally in th...
متن کاملA CRITICAL EXAMINIANTION OF RELATIVE CONCENTRATIONS OF VOLUME-CORRELATED AND SURFACE-CORRELATED SUBMICRON GLOBULES OF PURE Fe IN LUNAR SOILS
Introduction: Impacts on lunar soils produce melt and vapor in an approximate proportion of 7:1 [1]. The melt scavenges soil grains of diverse size, quenches and forms agglutinates, thereby converting surface correlated components of soil grains as volume correlated components; simultaneously, parts of the vapor may condense or escape. Cumulative small impacts increase the maturity of the soils...
متن کاملTopological repulsion between polymer globules
The work is motivated by the experimental observation of B. Chu et al. @Macromolecules 28, 180 ~1995!# which suggests that, while polymer globules in dilute solution in poor solvent are supposed to be very sticky, in actuality they collide many hundreds of times before merging and before aggregation starts. We argue that this slow-down is caused by an ‘‘entanglement force’’ which is operational...
متن کاملMolten globules move into action.
O ne of the important goals of protein engineering and design is to create proteins with novel binding specificities. In addition to the intrinsic interest in understanding how the affinity and specificity of protein–ligand interactions is modulated, one can imagine a variety of practical applications for such a technology. The most relevant natural proteins are antibodies, in which an incredib...
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ژورنال
عنوان ژورنال: Nature
سال: 1980
ISSN: 0028-0836,1476-4687
DOI: 10.1038/283108a0