[en] Production of type I collagen declines is a main characteristic during photoaging, but the mechanism is still not fully understood. Circular RNAs (circRNAs) are a class of newly identified non-coding RNAs with regulatory potency by sequestering miRNAs like a sponge. It's more stable than linear RNAs, and would be a useful tool for regulation of gene expression. However, the role of circRNAs in collagen expression during photoaging is still unclear. Here we performed deep sequencing of RNA generated from UVA irradiated and no irradiated human dermal fibroblasts (HDFs) and identified 29 significantly differentially expressed circRNAs (fold change ≥ 1.5, P < 0.05), 12 circRNAs were up-regulated and 17 circRNAs were down-regulated.3 most differentially expressed circRNAs were verified by qRT-PCR and the down-regulated circCOL3A1-859267 exhibited the most significantly altered in photoaged HDFs. Overexpression of circCOL3A1-859267 inhibited UVA-induced decrease of type I collagen expression and silencing of it reduced type I collagen intensity. Via a bioinformatic method, 44 miRNAs were predicted to binding with circCOL3A1-859267, 5 of them have been confirmed or predicted to interact with type I collagen. This study show that circCOL3A1-859267 regulate type I collagen expression in photoaged HDFs, suggesting it may be a novel target for interfering photoaging.

[en] A new bismuth-based polymer, [Hbpe][Bi(Hpydc)₂(pydc)]·H₂O (H₂pydc=pyridine-2,5-dicarboxylic acid, bpe=trans-bis(4-pyridyl) ethylene) has been hydrothermally synthesized. Transient photocurrent response and electrochemical impedance spectroscopy studies indicate that the synthesized polymer with efficient charge separation and transportation can be used as a potential photocatalyst. So we use it for the degradation of rhodamine B (RhB) dye wastewater under visible light. The comparative study on commercial Bi₂O₃ shows [Hbpe][Bi(Hpydc)₂(pydc)]·H₂O has the higher photocatalytic performance, with the degradation rate of 97% and 2% within 100 min for [Hbpe][Bi(Hpydc)₂(pydc)]·H₂O and commercial Bi₂O₃ respectively. Additionally, the five cycle reproducibility results of [Hbpe][Bi(Hpydc)₂(pydc)]·H₂O implies that it can be used as a stable photocatalyst. - Graphical abstract: We report a new 1D coordination polymer [Hbpe][Bi(Hpydc)₂(pydc)]·H₂O by a facile hydrothermal method. The Bi-CP shows good photoelectric property and photocatalytic activity for RhB degradation under visible white LED lamp irradiation. And the stability of the visible-light-responsive bismuth-based coordination polymer has also been examined. - Highlights: • A new Bi(III) coordination polymer is hydrothermally synthesized. • The Bi-CP shows good photoelectric and photocatalytic properties. • Bi-CP shows higher activity than the commercial Bi₂O₃ for RhB degradation.

[en] Two 2-(1-imidazole)-1-hydroxyl-1,1'-ethylidenediphosphonato and oxalic acid bridged coordination polymers (H_2en)[Co_3(H_2zdn)_2(ox)(H_2O)_2] (1) and Cd_2(H_2zdn)(ox)_0_._5(H_2O) (2) (2-(1-imidazole)-1-hydroxyl-1,1'-ethylidenediphosphonic acid=H_5zdn; oxalic acid=H_2ox) were synthesized under hydrothermal conditions and characterized by the infrared (IR), thermogravimetric analyses (TGA), elemental analyses (EA) and X-ray diffraction (XRD). Compound 1 is bridged by phosphonate anions to 1D chain, and further linked by oxalate anions to 2D layer. Compound 2 is bridged by O–P–O units of H_5zdn to the layer, and then pillared by oxalate anions to generate 3D frameworks. Compound 1 shows anti-ferromagnetic behaviors analyzed with the temperature-dependent zero-field ac magnetic susceptibilities, while compound 2 exhibits an influence on the luminescent property. - Graphical abstract: Linked by oxalate, two zoledronate-based metal–organic frameworks are synthesized, which exhibits the different frameworks. Magnetism and luminescent properties have been studied. The weak antiferromagnetic coupling is conducted in 1. - Highlights: • Compound 1 and 2 are first linked by oxalate anion based on zoledronic acid. • Compound 1 generates a classic “dia Diamond” (6"6) topology. • Compound 2 exhibits a (4"4·6"2)(4"4·6"6) topology. • Magnetism and luminescent properties of 1 and 2 have been studied, respectively

[en] A new Bi(III) coordination polymer Bi_2(Hpdc)_2(pdc)_2·2H_2O (H_2pdc=pyridine-2,6-dicarboxylic acid) was synthesized by hydrothermal method. Solid state thermal decomposition of this complex under 500 °C for 1 h led to the foliated Bi_2O_3 nanoparticles, which were then characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Comparative study on their photocatalytic activity toward the degradation of rhodamine B (RhB), methylene blue (MB) and methyl orange (MO) in polluted water was explored, and the mechanism of these photocatalytic degradation was discussed. These results provided some interesting insights into their photocatalytic applications. - Graphical abstract: We regard Bi_2(Hpdc)_2(pdc)_2·2H_2O with 1D chain structures as the precursor, then calcinate the complex to prepare nano-powder α-Bi_2O_3. The photochemical experiment indicates that Bi_2(Hpdc)_2(pdc)_2·2H_2O can be used as an efficient photocatalyst for the degradation of RhB and MB. Interestingly, nano α-Bi_2O_3 shows higher activity than the commercial Bi_2O_3 for the degradation of RhB, MB or MO. Display Omitted - Highlights: • A novel dinuclear Bi(III) coordination polymer is hydrothermally synthesized. • Calcinating the precursor Bi-CP will result in the nano Bi_2O_3 with foliated morphology. • Nano Bi_2O_3 shows higher activity than the commercial Bi_2O_3 for the degradation of dyes.

[en] An uranium coordination polymer, namely [(UO_2(pydc)(H_2O)]·H_2O (1) (H_2pydc=2,5-pyridinedicarboxylic acid), has been obtained by hydrothermal method and characterized by X-ray single crystal structure determination. Structural analysis reveals that complex 1 exhibits 1D chain coordination polymer, in which UO_2"2"+ ions are bridged by 2,5-pyridinedicarboxylate ligands and the chains are connected into a 3D supramolecular network by O–H···O hydrogen bond interactions and π–π stacking interactions. The photocatalytic properties of 1 for degradation of methylene blue (MB), Rhodamine B (RhB) and methyl orange (MO) under Hg-lamp irradiation have been performed, and the amount of the catalyst as well as Hg-lamp irradiation with different power on the photodegradation efficiency of MB have been investigated. Elemental analyses, infrared spectroscopy, TG-DTA analyses and luminescence properties were also discussed. - Graphical abstract: Complex 1 exhibits 1D chain coordination polymer in which UO_2"2"+ ions are bridged by 2,5-pyridinedicarboxylate ligand. Photoluminescence studies reveal that complex 1 exhibits characteristic emissions of uranyl centers. The compound is selective to degraded dye and displays good photocatalytic activities for the degradation of MB under Hg-lamp. Display Omitted - Highlights: • Complex 1 exhibits 1D chain coordination polymer. • Complex 1 could degrade methylene blue and Rhodamine B under Hg-lamp irradiation. • Luminescent property of 1 has been studied.

[en] Objective: To evaluate MR urography (MRU) in displaying the obstruction site, diagnosis and differential diagnosis of the obstructive lesions of the ureter. Methods: Preoperative MRU was studied retrospectively in 51 cases proved by clinical practice, surgery and pathology. Results: The rate of accurate localization reached 100%, and the rate accurate differentiating the benign and malignant lesions was 91%. Conclusion: MRU is valuable in the diagnosis and differential diagnosis of the obstructive lesions of ureter

[en] We study theoretically the superconductivity in doped quantum anomalous Hall insulators based on the Bogoliubov-de Gennes equations. The topological invariant is defined through which the phase diagram is obtained self-consistently. The energy spectrum and the excitations of the possible Majorana Fermions in each phase are discussed. The local density of states is studied. We propose that the zero energy peaks in the local density of states is not sufficient to identify the Majorana Fermions.

[en] Objective: To understand the various MRI manifestations of renal involvement of non Hodgkin's lymphoma (NHL) in children. Methods: MRI findings and characteristics in 11 cases confirmed by pathology with NHL renal involvement were retrospectively analyzed and the differential diagnosis was discussed. the positive rates of renal involvement in all lymphomas in children were also investigated. Results: In 11 cases NHL, 1 case had single mass in one kidney; 8 cases showed multiple nodules in both kidneys; 1 case which the two kidneys were widespread gradually had only single mass in one kidney; 1 case which the kidneys' cortex penetrated incrassation had no typical mass. All cases had encroached on abdominal viscera in various degrees. All focuses showed low or gently high signal on T₁WI and low signal on T₂WI, which had no putrescence in the center section. Conclusion: The MRI signs of renal involvement of NHL in children have certain characteristics. It is accurate to display the renal involvement of NHL by MRI scan. MRI is very valuable for the clinical staging and for the evaluation of therapeutic effects in NHL

[en] Given the recent discovery of ferroelectricity in highly doped AlN films and their widespread use in bulk acoustic wave (BAW) filters, the ferroelectric and acoustic performance of AlScN-based devices at two distinct polarization states, i.e., nitrogen (N)-polar and metal-polar states, is investigated. Unreleased metal-ferroelectric-metal (MFM) capacitors, as well as suspended MFM structures in the form of thin-film bulk acoustic resonators (FBARs), are fabricated based on Mo/AlScN/Mo-sputtered films with ≈30% Sc concentration. The hysteresis polarization-electric field (P-E) loops and internal resistance of the MFM capacitors are characterized. The FBAR devices are characterized at the two polarization states, where the polarization inversion is accompanied by the modulation of thin-film stress and resistance. Furthermore, the as-fabricated N-polar FBAR shows a fundamental thickness-mode resonance frequency of 3.17 GHz, with a quality factor (Q${}_{Bode}$) of 572 and a high effective electromechanical coupling coefficient (k${}_t^2$) of 11.4%. The FBAR frequency response changes when the polarization is switched from N-polar to metal-polar. Herein, the first investigations of electric and acoustic properties of N-polar and metal-polar AlScN-based devices are demonstrated, paving the way for the realization of high-k${}_t^2$-reconfigurable acoustic filters for next-generation communication systems operating at the super-high-frequency (SHF) range. (© 2021 Wiley-VCH GmbH)

[en] HTGR fuel production line built in Baotou Inner Mongolia, China North Nuclear Fuel Co,. Ltd., on March 16, 2013. The project is expected in Nov. 2015 to product. The technology based on Tsinghua University's technology for spherical fuel elements manufacturing with independent intellectual property rights, the manufacturing line include chemical conversion, UO₂ kernel preparation, coated particles preparation, fuel sphere preparation, graphite matrix preparation, waste processing, solid waste recycling and so on. To satisfy the production capacity and automatism requirement of demonstration project, perform magnifying research of process equipment, and optimize process design. Through perform technology research, accumulating experience that manufacture mega-quantity sphere fuel element which supply commercial modular HTGR in future. Achieve objective that advance level of national nuclear power. (authors)