549 research outputs found

    A note on Maxwell's equal area law for black hole phase transition

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    The state equation of the charged AdS black hole is reviewed in the TrT-r plane. Thinking of the phase transition, the TST-S, PVP-V, PνP-\nu graphs are plotted and then the equal area law is used in the three cases to get the phase transition point (P,T). The analytical phase transition point relations for P-T of charged AdS black hole has been obtained successfully. By comparing the three results, we find that the equal area law possibly cannot be used directly for PνP-\nu plane. According to the TST-S, PVP-V results, we plot the PTQP-T-Q graph and find that for a highly charged black hole a very low temperature condition is required for the phase transition

    N-(2-Chloro­benzo­yl)-N′-(3-pyrid­yl)thio­urea

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    In the mol­ecule of the title compound, C13H10ClN3OS, the dihedral angles between the plane through the thio­urea group and the pyridine and benzene rings are 53.08 (3) and 87.12 (3)°, respectively. The mol­ecules are linked by inter­molecular N—H⋯N hydrogen-bonding inter­actions to form a supra­molecular chain structure along the a axis. An intra­mol­ecular N—H⋯O hydrogen bond is also present

    Diaqua­bis­(4-carb­oxy-2-propyl-1H-imidazole-5-carboxyl­ato-κ2 N 3,O 4)copper(II) N,N-dimethyl­formamide disolvate

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    In the title complex, [Cu(C8H9N2O4)2(H2O)2]·2C3H7NO, the CuII ion, lying on an inversion center, is six-coordinated in a slightly distorted octa­hedral geometry. Two N atoms and two O atoms from two H2pimda (H3pimda is 2-propyl-1H-4,5-dicarb­oxy­lic acid) ligands are in the equatorial plane. The axial positions are occupied by two O atoms from two water mol­ecules. A two-dimensional supra­molecular network parallel to (001) is constructed by N—H⋯O and O—H⋯O hydrogen bonds. An intra­molecular O—H⋯O hydrogen bond is also observed

    SUPRASPECIFIC TAXA OF THE BIVALVIA FIRST NAMED, DESCRIBED, AND PUBLISHED IN CHINA (1927–2007)

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    A total of 209 bivalve generic (subgeneric) and 19 familial (subfamilial) names first proposed by Chinese palaeontologists and published in China are treated herein as an annotated database. The present paper is designed especially for the Treatise on Invertebrate Paleontology Bivalvia revision project, because access to bivalve taxa published by Chinese authors in China has been difficult for non-Chinese researchers. The original diagnoses of these taxa, including the original descriptions and explanation of figures of all the type species, have been translated from Chinese into English, so that non-Chinese colleagues can more easily have access to them
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