Decoupling sample heating from

It is also usually possible to remove all the couplings from a particular isotope, e.g. H, provided that one only wishes to observe the spectrum from another isotope, e.g. Either the decoupling frequency is noise-modulated to cover the relevant range of chemical shifts, or else the same decoupling is achieved more efficiently, and with less heating of the sample, by using a carefiilly designed, continuous sequence of... 

Fig. 1.8 Confocal Raman spectrum obtained from a heat-sealed composite silkZParaloid 726/ silk crepeline sample. In art-conservation polymers, such as polyCbutyl methacrylate) are used to consolidate fragile antique textiles. Here the lateral resolution of the technique has been combined with the confocal optics to decouple the spectrum of the adhesive from those of the other components.

Directional wattmeters are not very expensive and can be used to monitor the state of the impedance match under actual operating conditions. Thus, they are extremely useful when the impedance match is susceptible to changes, as when a sample absorbs so much power from the decoupler coil that the coil becomes detuned from the heat. 

Abrams et al. introduced a novel method for efficiently sampling in X by heating the X degrees of freedom to increase motion, but adiabatically decoupling them from the rest of the system by greatly increasing the mass to avoid perturbing the... 

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