Fragmentations are controlled by

Stereoselective reactions of acyclic alkenes 865 Fragmentations are controlled by stereochemistry 962... 

Through chemical ionization usually a soft ionization is achieved providing information on the (quasi-) molecular weight of a substance. The selectivity of the reaction and extent of fragmentation are controlled by the choice of the reagent gas. 

These radical polymerizations may simply be considered as an insertion of monomer molecules into the R-R bond of the initiator leading to the polymer with two initiator fragments. Thus, the end groups of the polymer are controlled by the initiator used. Otsu proposed the name iniferter (im tiator-trans/er agent-terminator) for the initiators with such functions [64]. Many radical initiators, such as peroxides, azo compounds, tetraphenylethane derivatives, and organic sulfur compounds, may be expected to serve as an iniferter, if monomers and polymerization conditions are selected. Some peroxides show relatively high... 

Breeching is a local perforation of the concrete element by the extremely high blast pressures of a close explosion. High velocity concrete fragments can result. Breeching failures are controlled by providing adequate reinforcement, concrete thickness and standoff distance to the explosive. 

Thus, the observed trend in lifetimes — (C2H )2 C2H HCl <excited mode, the amount of linear and angular momentum which must be incorporated into fragment motion, and the overall number of product channels available. This inferred mechanism is subject to further tests. These include measurements of product velocity and rotational distributions. Real time measurements of either the population in the initially pumped level or the appearance of product fragments would be of great significance. 

The objective of this work is to analyse the conformity of the roughness parameters measured with an optoelectronic profilometer in order to make the measurement results equivalent with those obtained with traditional contact devices. The working parameters of the optoelectronic profilometer are controlled by software and based on filters which are modified depending on the measurement basis, chromatic fragmentation of the white light in this case. However, these parameters substantially differ from the usual contact profilometers (cut-off, evaluation length. 

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