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| 1 | High-resolution characterization of hexagonal boron nitride coatings exposed to aqueous and air oxidative environments显示文摘六角形的硼氮化物(h-BN ) 被相信由于它的绝缘的性质比 graphene 把更好的钝化提供给金属性的表面,它便于堵住电子的流动,从而阻止流电的反应的出现。不过,当 h-BN-protected 材料暴露于水的环境时,这不能是盒子。在这个工作,我们分析了暴露于 H 2 O 2 和大气的条件。当暴露了到 H 2 O 2 。多层的 h-BN 提供了保护的好度。单层 h-BN 被发现也在空气气氛无效。甚至 10-15 层厚的 h-BN 栈不能完全在考虑下面保护金属的表面。由联合钻电子光谱学和第二等的离子团 spectrometry 技术,我们观察到氧能通过 h-BN 栈的谷物边界扩散到达金属性的底层。因为这个过程的散开的性质,一旦一个浸透的状态被到达,幸好,氧化区域没与时间增加。这成为多层(不单层) h-BN 一个合适的长期的氧化障碍。氧渗入不能被 X 光检查光电子光谱学观察。这种技术不能估计材料的更深的层的化学作文。因此,以前的报告,依靠了 XPS 分析 h-BN 和 graphene 的使钝化的性质,可能忽略了一些重要表面下的现象。在这研究获得的结果在水的媒介和暴露于空气环境的 h-BN-coated 金属的降级动力学提供新卓见进单音、多层的 h-BN 的使钝化的性质。 | Lanlan Jiang Na Xiao Bingru Wang Enric Grustan-Gutierrez Xu Jing Petr Babor Miroslav Kogbal Guangyuan Lu Tianru Wu Haomin Wang Fei Hui Yuanyuan Shi Bo Song Xiaoming Xie Mario Lanza | 2017 | Nano Research2017，10，6： | 2 |
| 2 | Investigation on a Supercritical Water Gasification System with CO_(2)as Transporting Medium显示文摘As a benign energy vector,hydrogen has been discussed for a long time.Supercritical water gasification was one of good ways to produce hydrogen.However,supercritical water gasification system with H_(2)O transporting was energy consuming in the process of heating due to the high specific heat of H_(2)O.A new supercritical water gasification system was established in this paper with supercritical CO_(2)as medium instead.Phenolic plastics were used as the sample transported by CO_(2).Production yields,energy flow and exergy flow of the system were collected and the influence of temperature,pressure,gasification concentration and transporting concentration was investigated.Mass flow of H_(2)O input into the reactor was 1000 kg/h.The typical condition was as follow:temperature 923.15 K,pressure 23 MPa,and the mass ratio of water,sample and transporting medium was 100:9:9.Yield of H_(2),CH4,CO and CO_(2)at this condition was 8.1 kg/h,39.6 kg/h,6.6 kg/h and 137.5 kg/h,respectively.Similar system with H_(2)O transporting was used to compare with the supercritical CO_(2)transporting system and proved that system with CO_(2)transporting could reduce the loss of both energy and exergy while the reduce of each gas production yield was less than 0.1 mol/mol. | WANG Weizuo LU Bingru SHI Jinwen ZHAO Qiuyang JIN Hui | 2023 | Journal of Thermal Science2023，32，4： | 0 |
| 3 | A SLC31A1-MEK-DNMT1-miR-124 feedback loop contributes to pancreatic cancer progression显示文摘Although the role of copper (Cu) in promoting KRas- or BRaf-mutation driven cancers via activating MEK1/2 kinases is known, the mechanism by which the copper transporter SLC31A1 (CTR1) is upregulated in pancreatic cancer (PDAC, KRas mutation) is not defined. In this study, we provide evidence that MEK signal maintains a high level of SLC31A1 through silencing the expression of miR-124-3P (miR-124) via a novel MEK-DNMT1-miR-124 feedback loop in PDAC cells. Further, we reveal that miR-124 directly targets suppression of SLC31A1, and miR-124 introduction together with tetrathiomolybdate (TM) treatment hampered pancreatic cancer growth in vitro and in vivo. Our results demonstrate that a SLC31A1-MEK-DNMT1-miR-124 feedback loop is an important pathway to maintain copper absorption and promote pancreatic cancer progression, and we hope to provide a Cu-chelation as an adjuvant treatment strategy, to block the progression in Kras mutant PDAC patients. | Jing Jin Mingjun Ma Bingru Yan Botao Qiu Shounan Lu Lin Yang Yuzhe Nie Sheng Tai Ze Yu Chun-Bo Teng | 2023 | Genes & Diseases2023，10，3： | 0 |
| 4 | Base-or acid-assisted polystyrene plastic degradation in supercritical CO_(2)显示文摘Plastic has caused serious'white pollution'to the environment,and the highly inert characteristics of plastic bring a major challenge for degradation.Supercritical fluids have unique physical properties and have been widely used in various fields.In this work,supercritical CO_(2)(Sc-CO_(2))with mild conditions was selected and assisted by NaOH/HCl solution to degrade polystyrene(PS)plastic,and the reaction model was designed using response surface methodology(RSM).It was found that,regardless of the types of assistance solutions,the factors affecting PS degradation efficiencies were reaction temperature,reaction time,and NaOH/HCl concentration.At the temperature of 400℃,time of 120 min,and base/acid concentration of 5%(in weight),0.15 g PS produced 126.88/116.99±5 mL of gases with 74.18/62.78±5 mL of H2,and consumed 81.2/71.5±5 mL of CO_(2).Sc-CO_(2)created a homogeneous environment,which made PS highly dispersed and uniformly heated,thus promoting the degradation of PS.Moreover,Sc-CO_(2)also reacted with the degradation products to produce new CO and more CH_(4)and C_(2)H_(x)(x=4,6).Adding NaOH/HCl solution not only improved the solubility of PS in Sc-CO_(2),but also provided a base/acid environment that reduced the activation energy of the reaction,and effectively improved the degradation efficiencies of PS.In short,degrading PS in Sc-CO_(2)is feasible,and better results are obtained with the assistance of base/acid solution,which can provide a reference for the disposal of waste plastics in the future. | Yanbing Liu Jinwen Shi Liuhao Mao Bingru Lu Xing Kang Hui Jin | 2023 | Waste Disposal and Sustainable Energy2023，5，2： | 0 |
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