Following the discovery of electricity and the division of labor in the 1870s, machine structure and precision dramatically improved from the macro-to the micro size, enabling interchangeability and mass production. In the second half of the 20th century, the synergy of optics and light-induced ...
Atoms of an element are all the same in terms of shape and size and atoms of different elements differ in size and shape. Elements are characterised by mass of their atoms so all the atoms of an element have identical weight. Different elements have atoms of different atomic weight. Atoms ...
The mass of a plant that extracts 600 t/yr of water is estimated at about 86 t with a power requirement of about 1067 kWe. The mass estimates include a self-contained nuclear power supply (20t), radiation shielding, and habitat for crew (20t). From EXPLORATION STUDIES TECHNICAL REPORT ...
aRepresentative TEM images of Pd NSs.bHigh-resolution high-angle annular dark-field (HAADF) STEM image of PdCu@Cu2O (Cu/Pd=1).cSTEM-EDS elemental mapping of PdCu@Cu2O (Cu/Pd=1).dThe first derivatives of Cu K-edge XANES of PdCu@Cu2O with different Cu/Pd ratio and references.eCatalytic...
First of all, it appears that the actual locations of the interstitial Li are slightly different from that in the standard atomic model. The observed Li spots in Fig. 3b−d are in fact shifted slightly to the right with respect to the standard 3c interstitial location indicated in ...
(2001) The first lunar map of the average soil atomic mass (abstract). Lunar Planet. Sci. 32, #1963. Lunar and Planetary Institute, Houston, Texas, USA (CD-ROM).Gasnault O. , Feldman W. C. , Maurice S. , Genetay I. and D'uston C. ( 2001 ) The first lunar map of the ...
measures a force, the AFM can be used for various types of surfaces (unlike the STM), such as semiconductors, metals, and insulatingoxides. A landmark achievement of this technique was the first AFM image of the Si(111)-7×7 reconstruction. A comprehensive review of the evolution of AFM ...
The decay of Pm has been studied resulting in the first detailed information on the excited states of Sm. About 25 levels were found, of which two were γ-... M Hellstroem,B Fogelberg,L Spanier - 《Phys Rev C Nucl Phys》 被引量: 20发表: 1990年 NucleargFactors of the First Excited...
ALD has also been employed for mass production of one-dimensional (1D) nanostructures. They are primarily produced by using highly porous materials such as aerogel or anodized aluminum oxide (AAO). Materials with 1D characteristics can be obtained by ALD by completely filling the holes of such po...
25 nm diameter4,5. Facilitated transport rates can reach ~1000 translocation events or a mass flow of 100 MDa per NPC per second6, and NPC passage of a single molecule is usually completed within milliseconds to tens of milliseconds7,8,9, even for ribosomal subunits10. In fact, passage...