acontrary to expectation,scientists tell us that both the diamond and the "lead" from a pencil are composed of the same material-carbon atoms.The primary difference is the arrangement of these atoms. 相反到期望,科学家告诉我们金刚石和“主角”从铅笔由同样材料碳原子组成。第一差别是这些原子的安排...
A further complication is that for a carbon, which has four different groups attached to it in a tetrahedral arrangement, there are two optical isomers called laevo (l-) and dextro (d-) from their different abilities to rotate the plane ofpolarised light. They are structural mirror images whi...
The Fe3 triangle of 3 at 128 K is asymmetric with three inequivalent Fe ions; the triangle becomes more equilateral at the higher temperature. The solid-state packing arrangement of 2, 3, and presumably 4 consists of Fe3O units ... SM Oh,SR Wilson,DN Hendrickson,... - 《Journal of ...
A method and a measuring arrangement are disclosed for nondestructive analysis of an examination object. In at least one embodiment of the method, x-radiation having a specific energy spectrum is generated by an x-ray source, with the ai... J Baumann,M Engelhardt,Jrg Freudenberger,... - US...
This rigid arrangement of the putative DNA-binding domain imposed strong constraints on how TerSP76-26 can bind DNA. Finally, the TerSP76-26 structure lacked the conserved C-terminal β-barrel domain used by other TerS proteins for binding TerL. This suggests that a well-ordered C-terminal ...
Furthermore, due to the different sensitivities of the constitutive metaatoms to the variation of graphene chemical potential, the focusing dynamics are designable. By simply changing the arrangement of the metaatoms in a metalens, the focal length can be designed to vary in a large dynamic range...
The invention relates to a monophase hydraulic binder containing silicon, calcium, oxygen and hydrogen atoms in an arrangement comprising silicate building units having an average connectedness of no more than Qand silanol groups, with n... G Beuchle,P Stemmermann,U Schweike,... - US 被引量...
The optical arrangement shows some novelties: the plateau can be cooled either by water or liquid nitrogen and it holds the convex- concave machined Si(111) channel-cut for fixed exit performances. The shape of the machined surfaces of the crystal helps also on to spread the power density of...
Process for the masking of the targets fixed or mobile, in particular military purposes, to the action of a location by an electromagnetic radiation situated in the range of wavelengths of 1 mm to 1 m, emitted by a radar, for the production and the arrangement of a gas shield, in the ...
Practically speaking, this study develops and implements new arrangement of atoms able to improve wide-area stability monitoring and control using a dual-dictionary signal reconstruction approach. To this end, fixed and adaptive structures have been investigated based on DCT, DHT, and DWT dictionary ...