نتایج جستجو برای: preserving material
تعداد نتایج: 415130 فیلتر نتایج به سال:
In this paper, we present some general results determining minimax bounds on statistical risk for density estimation based on certain information-theoretic considerations. These bounds depend only on metric entropy conditions and are used to identify the minimax rates of convergence.
In this letter, we present the general form of equations that generate a volume-preserving flow on a symplectic manifold (M, ω). It is shown that every volume-preserving flow has some 2-forms acting the rôle of the Hamiltonian functions in the Hamiltonian mechanics and the ordinary Hamilton equations are included as a special case with a 2-form 1 n−1 H ω where H is the corresponding Hamiltonian...
• An optimized protocol for obtaining and preserving RNA from blood cells is provided. • The results serve as guideline for sensitive measurement of mRNA and microRNA expression in clinical material. Assessing messenger RNA (mRNA) and microRNA levels in peripheral blood cells may complement conventional parameters in clinical practice. Working with small, precious samples requires optimal RNA y...
BACKGROUND The conventional method for decalcification of bone specimens uses hydrochloric acid (HCl) and is notorious for damaging cellular RNA, DNA, and proteins, thus complicating molecular and immunohistochemical analyses. A method that can effectively decalcify while preserving genetic material is necessary. METHODS Pairs of bilateral bone marrow biopsies sampled from 53 patients were de...
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