{5,10,15,20-Tetra­kis[4-(hex­yloxy)phen­yl]porphyrinato}nickel(II)

The mol­ecule of the title compound, [Ni(C68H76N4O4)], is located on a crystallographic inversion center. The Ni—N distances within the square-shaped coordination environment are 1.951 (2) and 1.954 (2) Å. Three terminal C atoms in one of the hexyl groups are disordered over two sets of sites, with site-occupancy factors of 0.615 (13) and 0.385 (13)

[meso-Tetra­kis(4-heptyl­oxyphen­yl)porphyrinato]nickel(II)

In the title compound, [Ni(C72H84N4O4)], the four-coordinate NiII ion in the middle of the planar 24-membered porphyrin ring is located on a crystallograpic inversion center, with Ni—N distances of 1.946 (2)–1.951 (2) Å. The 4-heptyl­oxyphenyl groups are twisted with respect to the porphyrin mean plane, the dihedral angles being 88.5 (3) and 79.1 (2)°

[(1,3-Benzothia­zol-2-yl)amino­carbon­yl]meth­yl piperidine-1-carbodithio­ate monohydrate

In the title compound, C15H17N3OS3·H2O, the piperidine ring has a chair conformation. The crystal structure is stabilized by weak inter­molecular N—H⋯O, O—H⋯N and O—H⋯O hydrogen-bonding inter­actions

Report of KiTS19 competition

As an important organ of the urinary system, the kidney focuses on generating urine, purifying the blood, and also maintaining water, electrolytes and acid-base balance. Kidney tumors, as one of the most common tumors, are extremely harmful. Once they are found, surgery is the widespread treatment. Therefore, accurate segmentation of renal tumors is of great significance to surgeons performing renal tumor resection. To this end, this paper proposes an effective method for segmentation of the kidney and its tumor for the KiTS19 competition. Specifically, our method first designs a 3D ResUNet framework to segment the whole kidney, and then develops a 2.5D segmentation network to segment the tumors based on the result of kidney segmentation. After validation, the performance of our method reaches a good level under the given metric

A Close-in Substellar Object Orbiting the sdOB-type Eclipsing-Binary System NSVS14256825

NSVS 14256825 is the second sdOB + dM eclipsing binary systems with anorbital period of 2.65 hours. The special binary was reported to contain circumbinary planets or brown dwarfs by using the timing method. However, different results were derived by different authors because of the insufficient coverage of eclipse timings. Since 2008, we have monitored this binary for about 10 years by using several telescopes and 84 new times of light minimum in high precision were obtained. It is found that the O-C curve is increasing recently and it shows a cyclic variation with a period of 8.83 years and amplitude of 46.31 seconds. The cyclic change cannot be explained by magnetic activity cycles of the red-dwarf component because the required energy is much larger than that radiated by this component in one whole period. This cyclic change detected in NSVS1425 could be explained by the light-travel time effect via the presence of a third body. The lowest mass of the third body is determined as 14.15 Mjup that is in the transition between planets and brown dwarfs. The substellar object is orbiting around this evolved binary at an orbital separation around 3 AU with an eccentricity of 0.12. These results indicate that NSVS 14256825 is the first sdOB-type eclipsing binary consisting of a hierarchical substellar object. The detection of a close-in substellar companion to NSVS 14256825 will provide some insights on the formation and evolution of sdOB-type binaries and their companions.Fil: Zhu, Li-Ying. Yunnan Observatories, Chinese Academy Of Sciences; ChinaFil: Qian, Sheng Bang. Yunnan Observatories, Chinese Academy Of Sciences; ChinaFil: Fernandez Lajus, Eduardo Eusebio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Astrofísica La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Instituto de Astrofísica La Plata; ArgentinaFil: Wang, Zhi Hua. Yunnan Observatories, Chinese Academy Of Sciences; ChinaFil: Li, Lin Jia. Yunnan Observatories, Chinese Academy Of Sciences; Chin

{5,10,15,20-Tetra­kis[4-(oct­yloxy)phen­yl]porphyrinato}copper(II)

In the title compound, [Cu(C76H92N4O4)], the central Cu(II) ion is situated on an inversion centre. The porphyrinate core exhibits a nearly planar conformation [maximum deviation = 0.027 (3) Å], with Cu—N distances of 1.997 (2) and 2.001 (2) Å. The benzene rings of the 4-octyloxyphenyl groups are rotated at angles of 84.02 (8) and 77.02 (6)° with respect to the mean plane of the porphyrin fragment. The two terminal C atoms in the octyl group are disordered over two positions of equal occupancy

{meso-Tetra­kis[p-(hept­yloxy)phen­yl]­porphyrinato}silver(II)

The title compound, [Ag(C72H84N4O4)], crystallizes with the AgII cation on a centre of symmetry. The macrocyclic 24-membered ring core is planar with a mean deviation of 0.0311 (15) Å and the four-coordinate AgII cation fits into its center, at 2.0814 (19) and 2.0872 (19) Å, from the surrounding pyrrole-N atoms, in agreement with what is found in related compounds. The p-heptyl­oxyphenyl groups are rotated 75.51 (5) and 84.45 (8)° with respect to the porphyrin mean plane, due to steric hindrance with the pyrrole-H atoms of the macrocycle

Experimental study of THGEM detector with mini-rim

The gas gain and energy resolution of single and double THGEM detectors (5{\times}5cm2 effective area) with mini-rims (rim is less than 10{\mu}m) were studied. The maximum gain can reach 5{\times}103 and 2{\times}105 for single and double THGEM respectively, while the energy resolution of 5.9 keV X-ray varied from 18% to 28% for both single and double THGEM detectors of different hole sizes and thicknesses.All the experiments were investigated in mixture of noble gases(argon,neon) and small content of other gases(iso-butane,methane) at atmospheric pressure.Comment: 4pages,6figures, it has been submitted to Chinese Physics