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Manganese porphyrin complexes catalyze the hydroxylation of saturated hydrocarbons by potassium hydrogen persulfate (or Oxone) at room temperature. High conversions of hydrocarbons are obtained. 相似文献
95.
W. S. Lyon E. Ricci L. C. Bate F. F. Dyer 《Journal of Radioanalytical and Nuclear Chemistry》1973,15(1):399-404
The forensic activation analyst must often evaluate his own results as they relate to certain legal or moral situations, since
investigative officers, and courts of law are not usually competent to make judgements of the validity or meaning of scientific
data. In providing scientific evidence in court, two criteria for criminal identification must be met: (1) suspect's sample
should be similar to sample found at the scene of the crime, (2) samples relared to other people in the same statistical population
should not generally match that found at the crime site. When two or more specimens are submitted for comparison by NAA they
will usually fall into one of three classes: (a) materials about which we have partial or inconclusive data, (c) materials
with an excellent analytical data background. Ideally all cases would fall in category c; in practice, very few. Some examples
of cases and/or situations that fall into these three categories in both individual and corporate investigations are given.
Research sponsored by U.S. Atomic Energy Commission under contract with Union Carbide Corporation. 相似文献
96.
Summary Detailed comparisons between Montecarlo and Boltzmann calculations of electron energy distributions in gases acted upon by
RF fields are presented. Attention is turned to model gases of special theoretical interest but various calculations have
also been made for real gases such as pure CO and He−CO mixtures. The analysis has shown that large discrepancies exist between
energy distributions obtained with the two mentioned techniques under conditions of particular physical interest. The discrepancies
are found to be the consequence of the two-term approximation and are expected to disappear if an appropriate multiterm solution
of the Boltzmann equation is adopted. 相似文献
97.
E. Majorana P. Puppo P. Rapagnani F. Ricci 《Applied physics. B, Lasers and optics》1997,64(2):145-151
The Back Action Evading technique is a particular kind of quantum non demolition measurement, first proposed by Caves et al.
in 1980 [3]. We present an experimental study to implement the Back Action Evading measurement scheme in monitoring the amplitude
of an harmonic oscillator excited by a classical force. Results showing the agreement of our theoretical model with the experimental
behaviour of our apparatus in the classical regime are presented. We discuss also the optimization of the performance of our
set-up, which should allow to monitor our oscillator in quantum regime even below the standard quantum limit level.
Received: 22 March 1996 相似文献
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