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Starting Soft-start method

As a further soft ionisation method plasma desorption (PD) has been developed [25]. The nucleic decay of Cf results in two 100 MeV products that desorb the analyte molecules from a nitrocellulose-coated film and also give the starting signal for the pulsed time-of-flight detection. [Pg.332]

In this chapter, we address and discuss the application of XPS to the chemical investigation of simple (MOx), doped (M M Ox) and multicomponent oxides (MOx M Oy). Although the presented systems are very different, from the chemical and functional point of view, the common features they present is they were all prepared by soft-chemistry methods starting from molecular precmsors. The preparation route is in many cases the sol-gel method, whereas in some of the presented cases studies, they were prepared by other wet-chemistry methods, as extensively described in the given references. [Pg.129]

SOLID-STATE MOTOR CONTROL FOR AC INDUCTION MOTORS Electromechanical versus Solid-State Soft Starting Selection of Solid-State Motor Controls Starting Methods for Solid-State Motor Controls Environmental Conditions for Solid-State Motor Controls Wiring Considerations for Solid-State Motor Controls Cost Considerations... [Pg.640]

Both methods, MALDI and ESI, started to become perhaps the most successful and fastest developing MS techniques, especially for the identification of biopolymers. The combination of these so-called soft ionization methods with TOF mass spectrometers enabled fast and accurate MS analysis. Soon after their invention, the first synthetic polymers were successfully investigated. Moreover, polymer speara impressively demonstrated the ability of these two new MS methods for macromolecular research. Aside from molecular masses, mass distributions, and end groups, the stmcture of repeating units (monomers) could be easily deteaed. [Pg.93]

Recent demands for polymeric materials request them to be multifunctional and high performance. Therefore, the research and development of composite materials have become more important because single-polymeric materials can never satisfy such requests. Especially, nanocomposite materials where nanoscale fillers are incorporated with polymeric materials draw much more attention, which accelerates the development of evaluation techniques that have nanometer-scale resolution." To date, transmission electron microscopy (TEM) has been widely used for this purpose, while the technique never catches mechanical information of such materials in general. The realization of much-higher-performance materials requires the evaluation technique that enables us to investigate morphological and mechanical properties at the same time. AFM must be an appropriate candidate because it has almost comparable resolution with TEM. Furthermore, mechanical properties can be readily obtained by AFM due to the fact that the sharp probe tip attached to soft cantilever directly touches the surface of materials in question. Therefore, many of polymer researchers have started to use this novel technique." In this section, we introduce the results using the method described in Section 21.3.3 on CB-reinforced NR. [Pg.597]

The first-zero method starts from the ideal lattice and Eq. (8.67). For the purpose of evaluation of scattering curves from polydisperse soft matter the ideal long period, L, is replaced by Lapp, i.e. the validity of j (v (1 -v )Lapp)= Ois assumed. Because of the fact that the zero of a function is determined, not even a normalization of yt (x) is required [162], Figure 8.22 displays the model data of Fig. 8.21 after the method-inherent renormalization x —> x/Lapp. Comparison with Fig. 8.21 shows that now... [Pg.162]

There are several methods of producing gas-phase inorganic ions, the starting materials in mass spectrometric studies. The properties of the source of the ions required for study are important in the choice of ionization method. The production of bare metal ions from an involatile nonmolecular source requires a large amount of energy deposited on the surface of the material. The processes that occur after the initial ionization process may also affect the ions finally observed (e.g., clustering). At the other end of the ionization energy spectrum, gas-phase ions of a complexity similar to those observed in the condensed phases require a soft ionization process. A brief description of some of the ionization methods follows. [Pg.352]

To our knowledge there have been no reported measurements of equilibrium defect concentrations in soft-sphere models. Similarly, relatively few measurements have been reported of defect free energies in models for real systems. Those that exist rely on integration methods to connect the defective solid to the perfect solid. In ab initio studies the computational cost of this procedure can be high, although results have recently started to appear, most notably for vacancies and interstitial defects in silicon. For a review see Ref. 109. [Pg.50]


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See also in sourсe #XX -- [ Pg.127 ]




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