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501.
In this paper we obtain topological static solutions of some kind of pure F(R) gravity. The present solutions are two kind: first type is uncharged solution which corresponds with the topological (a)dS
Schwarzschild solution and second type has electric charge and is equivalent to the Einstein-Λ-conformally invariant Maxwell
solution. In other word, starting from pure gravity leads to (charged) Einstein-Λ solutions which we interpreted them as (charged)
(a)dS black hole solutions of pure F(R) gravity. Calculating the Ricci and Kreschmann scalars show that there is a curvature singularity at r = 0. We should note that the Kreschmann scalar of charged solutions goes to infinity as r → 0, but with a rate slower than that of uncharged solutions. 相似文献
502.
Mojtaba Shamsipur Abdollah Salimi Seyed Mehdi Golabi Hashem Sharghi Mir Fazlollah Mousavi 《Journal of Solid State Electrochemistry》2001,5(1):68-73
The preparation and aqueous electrochemistry of carbon paste electrodes modified by some amino-substituted 9,10-anthraquinones
are reported. In all cases, the reduction processes studied by cyclic voltammetry reveal a quasi-reversible behavior. The
half-wave potentials were calculated as a function of the solution pH and from the resulting potential-pH plots the formal
potentials and pK
a
′ values of different redox and acid-base couples involved at various pH ranges were evaluated. The diffusion coefficients
of different anthraquinone derivatives used in paraffin oil were calculated by chronoamperometry.
Received: 3 May 1999 / Accepted: 15 November 1999 相似文献
503.
Moghadam Atefeh Mousavi Haghighi Behzad 《Journal of Solid State Electrochemistry》2023,27(9):2375-2385
Journal of Solid State Electrochemistry - In the present work, a glassy carbon electrode was modified with carboxyl functionalized multi-walled carbon nanotubes (f-MWCNTs) to investigate the... 相似文献