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Subject shape-changing

Shape Change of Structural Entities. In many cases the growing anisotropy is not only a phenomenon of rotating structural entities, but also goes along with a deformation of the structural entities themselves. This case will be studied here. Only affine deformations shall be discussed. In practice, such processes are observed while thermoplastic elastomers are subjected to mechanical load, but also while fibers are spun. [Pg.223]

Spectral line width varies inversely with the excited-state lifetime according to Heisenbergs principle, AT X A H = hi 2n, where AT is the lifetime of the excited spin state, h is Planck s constant, and AH is the effective width of the absorption signal. Excited-state lifetimes are subject to environmental (including chemical) influences. The resulting line-shape changes yield information about the chemical environment of the Mn atoms. Both spin-lattice and spin-spin relaxation mechanisms can contribute to the overall lifetime. [Pg.501]

A couple of points of passing interest. As to stability many of the free-base tryptamines are sensitive to air oxidation, some of them extremely so. This particular base, standing for a goodly number of years with no particular protection from air, has remained almost colorless, with no apparent signs of decomposition. And as to subjective effects there is almost a total lack of visual phenomena. There were no wave-forms, color distortion or object shape changes, and no eyes-closed imagery, unlike most N,N-disubstituted tryptamines. [Pg.192]

In the above, qualitative description of the expected trends of interrelations of changes in molecular shape and electronic state, an important element was missing a quantitative description of molecular shape and a numerical measure of shape changes. A precise, quantitative molecular shape description is also needed in the study of most other problems of chemistry, as well as in various related subjects, such as biochemistry, pharmacology, medicinal chemistry, and drug design. [Pg.19]

Single-walled carbon nanotubes (SWNT) were proposed as nanoscale electromechanical pressure sensors [6]. It was demonstrated by computation that a pressure induced a reversible shape transition in armchair SWNTs, which in turn induced a reversible electrical transition from metal to semiconductor. The potential long lifetime nature of this pressure sensor due to the excellent mechanical durability of the carbon nanotubes was pointed out as a superior aspect. SWNTs can also be used, besides as pressure sensors, as mass, strain, and temperature sensors by sensing the resonant frequency shift of a carbon nanotube resonator when it is subjected to changes in attached mass, external loading, or temperature [7, 8]. The feasibility of such a sensor was illustrated by means of computer... [Pg.2829]

Once the 3D data for an individital s extremity have been captured, it is not simply a process of inverting this shape to create the desired customised interface. It is likely that the scan (either direct or indirect) was taken while the subject was in a relaxed or passive position. When the hand is using equipment or the foot is placed within a boot, their external shape changes through both movement of the bones and deformation of the flesh. It is this active position that must be... [Pg.158]

The reactor barrel extracted from the mono-block after the spent fuel has been reloaded is subject to changes in shape depending upon resistance of the basket material to fast neutron fluence and the effects of thermal strength therefore, the possibility of a repeated use of the basket needs to be validated. [Pg.540]

The shape of the neutralization curve is a function of the reacting substances. If the ingredients of the influent are subject to change, the slope of the curve at a given pH may also change. This amounts to a second gain variation superimposed on the first. This is not a predictable characteristic. [Pg.53]


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See also in sourсe #XX -- [ Pg.31 , Pg.42 ]




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