نتایج جستجو برای: pi 262447 12
تعداد نتایج: 621674 فیلتر نتایج به سال:
In a recent paper [12] Gang Yu stated the following conjecture: Let {pi}i=1 be an arbitrary sequence of polynomials with increasing degrees and all coefficients in {0, 1}. If we denote by (#pi) the number of non-zero coefficients of pi, and let M(pi ) be the maximal coefficient of pi , then Q := lim inf i→∞ deg(pi) M(pi ) (#pi) ≥ 1, (∗) as long as (#pi) = o(deg pi), as i → ∞. We give an explici...
Using psi(2S)-->pi;{+}pi;{-}J/psi, J/psi-->gammaeta;{'} events acquired with the CLEO-c detector at the CESR e;{+}e;{-} collider, we make the first observations of the decays eta;{'}-->pi;{+}pi;{-}pi;{0} and eta;{'}-->pi;{+}pi;{-}e;{+}e;{-}, measuring absolute branching fractions (37_{-9};{+11}+/-4)x10;{-4} and (25_{-9};{+12}+/-5)x10;{-4}, respectively. For eta;{'}-->pi;{+}pi;{-}pi;{0}, this re...
in this paper, at first we introduce a new index with the name co-pi index and obtain someproperties related this new index. then we compute this new index for tuc4c8(r) nanotubes.
Abstract Using the 1.32 $$\hbox {pb}^{-1}$$ pb - 1 statistics collected at $$J/\psi $$ J / ψ peak with KEDR detector VEPP-4M $$e^{+}e^{-\, }$$ e +</...
The replication initiator protein pi of plasmid R6K binds seven 22 bp direct repeats (DR) in the gamma origin. The pi protein also binds to an inverted repeat (IR) in the operator of its own gene, pir, which lies outside the gamma origin sequences. A genetic system was devised to select for pi protein mutants which discriminate between IR and DR (York et al., Gene (Amst.) 116, 7-12, 1992; York ...
Na/Hg reduction of (silox)2Cl2Mo=NtBu (3) afforded C2h [(silox)2Mo=NtBu]2(mu-Hg) (12-Hg), which consists of two distorted trigonal monoprisms with Hg at the each apex (d(MoHg) = 2.6810(5) A). Calculations reveal 3c4e bonding in the linear MoHgMo linkage that renders 12-Hg susceptible to nucleophilic cleavage. Exposure to PMe3 and pyridine rapidly (<5 min) affords (silox)2(tBuN)MoLn (L = PMe3, n...
We investigate geometric configurations of $$\alpha $$ ( $$^4$$ He nucleus) clusters in the second $$J^\pi =2^+$$ state $$^{12}$$ C, which has been discussed as a rotational band member $$0^+$$ state, Hoyle state. The ground and excited $$2^+$$ states are described by three- cluster model. three-body Schrödinger equation with orthogonality conditions is accurately solved stochastic variational ...
Abstract Introduction: Mechanical plaque removal is the most reliable method of oral hygiene practice. However, to maximize its effect, it should be accompanied by the use of chemical agents such as toothpastes, mouth washes and fluoride gels. This study aimed to compare the effect of tooth brushing with an Iranian toothpaste compared to a commonly used foreign-made toothpaste on plaque in...
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