نتایج جستجو برای: ion species
تعداد نتایج: 741671 فیلتر نتایج به سال:
The competit ion graph of a digraph was first defined in 1968 by Cohen in the study of ecosystems. The competition graph essentially relates any two species which have a common prey. In this paper, a compet i t ion-common enemy graph of a digraph is defined and studied. As the term suggests, it relates any two species which have a common prey and a common enemy. Results analogous to those found...
Recent developments in quantum information processing may be applicable to future atomic clocks. In this paper we discuss two potential applications to trappedion frequency standards. In the first, quantum-mechanical entanglement can provide a resource for increased measurement precision in spectroscopy. In the second, we indicate how a simultaneously trapped auxiliary ion species can be used t...
A nanosecond time-resolved resonance Raman (ns-TR3) spectroscopic study of the reactions of the 2-fluorenylnitrenium ion with several C8-substituted guanosine derivatives is reported. The TR3 spectra show that the 2-fluorenylnitrenium ion reacts with the C8-substituted guanosine derivatives (C8-methylguanosine and C8-bromoguanosine) to produce C8 intermediates with the methyl and bromine moieti...
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