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Mechanisms of interfacial reactions between 316L stainless steel and MnO-SiO_(2) oxide during isothermal heating

Journal of Iron and Steel Research International 2023年第8期30卷 1511-1523页

作者： cheng-song Liu Fu-kang Li Hua zhang Jie Li Yong Wang Yuan-yuan Lu Li Xiong Hong-wei Ni The State Key Laboratory of Refractories and Metallurgy.Wuhan University of Science and Technology Wuhan 430081HubeiChina Hubei Provincial Key Laboratory for New Processes of Ironmaking and Steelmaking Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hubei Guoan Special Steel Inspection Co. Ltd.Huangshi 435000HubeiChina

Diffusion couple experiments were performed to study the thermodynamic and kinetic mechanisms of interfacial reactions between the 316L stainless steel and the composite MnO-SiO_(2) oxide during isothermal heating at 1473 K(1200℃)for 1,3,5,and 10 h and at 1173,1273,1373,1473,and 1573 K(900,1000,1100,1200,and 1300℃)for 3 *** variations in the 316L stainless steel and the composite MnO-SiO_(2) oxide in the vicinity of the steel-oxide interface in each diffusion couple specimen were *** and after isothermal heating,thermodynamic equilibria between the oxide and steel at the interface were estimated in accordance with the calculation of the Gibbs free energy change in the interfacial steel-oxide *** diffusion coefficients of Mn,Cr,and Si in 316L stainless steel under different experimental conditions were quantitatively *** results showed that solid-state interfacial reactions occurred between the Cr in the 316L stainless steel and composite MnO-SiO_(2) oxide during isothermal heating,which resulted in the depletion of Cr and accumulation of Si and Mn in the steel in the vicinity of the steel-oxide *** widths of the Crdepleted zone,Mn-accumulated zone and Si-accumulated zone all showed increasing trends with increasing isothermal heating temperature and *** average values of the diffusion coefficients of Mn,Cr,and Si in the steel at 1473 K(1200℃)were 1.21×10^(^(-14))±2.96×10^(-15),1.69×10^(-14)±2.54×10^(-15),and 1.00×10^(-14)±1.96×10^(-15) m^(2)s^(-1),respectively,and they continued to increase with increasing isothermal heating temperature.

关键词： 316L stainless steel Diffusion couple Isothermal heating Diffusion coefficient Interfacial reaction

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Paclitaxel-induced stress granules increase LINE-1 mRNA stability to promote drug resistance in breast cancer cells

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The Journal of Biomedical Research 2021年第6期35卷 411-424页

作者： Xiao Shi Xinxin Si Ershao zhang Ruochen Zang Nan Yang He cheng Zhihong zhang Beijing Pan Yujie Sun Key Laboratory of Human Functional Genomics of Jiangsu Province Nanjing Medical UniversityNanjingJiangsu 211166China Department of Cell Biology School of Basic Medical SciencesNanjing Medical UniversityNanjingJiangsu 211166China Collaborative Innovation Center for Cancer Personalized Medicine Nanjing Medical UniversityNanjingJiangsu 211166China Department of Pathology the First Affiliated Hospital of Nanjing Medical UniversityNanjingJiangsu 210036China.

Abnormal expression of long interspersed element-1(LINE-1)has been implicated in drug resistance,while our previous study showed that chemotherapy drug paclitaxel(PTX)increased LINE-1 level with unknown *** analysis suggested the regulation of LINE-1 mRNA by drug-induced stress granules(SGs).This study aimed to explore whether and how SGs are involved in drug-induced LINE-1 increase and thereby promotes drug resistance of triple negative breast cancer(TNBC)*** demonstrated that SGs increased LINE-1 expression by recruiting and stabilizing LINE-1 mRNA under drug stress,thereby adapting TNBC cells to chemotherapy ***,LINE-1 inhibitor efavirenz(EFV)could inhibit drug-induced SG to destabilize *** study provides the first evidence of the regulation of LINE-1 by SGs that could be an important survival mechanism for cancer cells exposed to chemotherapy *** findings provide a useful clue for developing new chemotherapeutic strategies against TNBCs.

关键词： LINE-1 stress granules RNA stability neoplasm drug resistance triple negative breast cancer

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Fe-doped SnO_(2) nanosheet for ambient electrocatalytic nitrogen reduction reaction

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Nano Research 2022年第7期15卷 6026-6035页

作者： Yaxi Li Yixian Liu Xiang Liu Yunliang Liu Yuanyuan cheng Peng zhang Peiji Deng Jiujun Deng Zhenhui Kang Haitao Li Institute for Energy Research School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Institute of Medicine&Chemical Engineering Zhenjiang CollegeZhenjiang 212000China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of EducationInstitute of Environmental Research at Greater BayGuangzhou UniversityGuangzhou 510006China School of Physics The University of SydneySydneyNew South Wales 2006Australia Institute of Functional Nano and Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-based Functional Materials and DevicesSoochow UniversitySuzhou 215123China

Ammonia plays a vital role in the development of modern agriculture and *** to the conventional Haber–Bosch ammonia synthesis in industry,electrocatalytic nitrogen reduction reaction(NRR)is considered as a promising and environmental friendly strategy to synthesize ***,inspired by biological nitrogenase,we designed iron doped tin oxide(Fe-doped SnO_(2))for nitrogen *** this work,iron can optimize the interface electron transfer and improve the poor conductivity of the pure SnO_(2),meanwhile,the synergistic effect between iron and Sn ions improves the catalyst *** the electrocatalytic NRR test,Fe-doped SnO_(2) exhibits a NH_(3) yield of 28.45μg·h^(−1)·mgcat^(−1),which is 2.1 times that of pure SnO_(2),and Faradaic efficiency of 6.54%at−0.8 V *** in 0.1 M Na_(2)SO_(4).It also shows good stability during a 12-h long-term stability *** functional theory calculations show that doped Fe atoms in SnO_(2) enhance catalysis performance of some Sn sites by strengthening N–Sn interaction and lowering the energy barrier of the rate-limiting step of *** transient photovoltage test reveals that electrons in the low-frequency region are the key to determining the electron transfer ability of Fe-doped SnO_(2).

关键词： electrocatalyst nitrogen reduction reaction Fe-doped SnO_(2)

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Observation of oxygen evolution over a {Ni12}-cluster-based metal-organic framework

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Science China Chemistry 2022年第6期65卷 1088-1093页

作者： Zongsu Han Zheng Yan Kunyu Wang Xinchen Kang Kai Lv Xiaoping zhang Zhen Zhou Sihai Yang Wei Shi Peng cheng Department of Chemistry Key Laboratory of Advanced Energy Materials Chemistry(MOE)Renewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin300071China College of Biological Chemical Sciences and EngineeringJiaxing UniversityJiaxing314001China Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing100190China Department of Chemistry University of ManchesterManchesterM139PLUK School of Materials Science and Engineering Institute of New Energy Material ChemistryNankai UniversityTianjin300350China

The development of efficient electrocatalysts based on non-noble metals for oxygen evolution reaction(OER) remains an important and challenging task. Multinuclear transition-metal clusters with high structural stability are promising OER catalysts but their catalytic role is poorly understood. Here we report the crystallographic observation of OER activity over robust {Ni12}-clusters immobilised in a porous metal-organic framework, NKU-100, by single-crystal X-ray diffraction as a function of external applied potential. We observed the aggregation of confined oxygen species around the {Ni12}-cluster as a function of applied potential during the electrocatalytic process. The refined occupancy of these oxygen species shows a strong correlation with the variation of current density. This study demonstrates that the enrichment of oxygen species in the secondary coordination sphere of multinuclear transition-metal clusters can promote the OER activity.

关键词： metal-organic framework oxygen evolution reaction secondary coordination sphere X-ray diffraction binding site

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Gelation of Hole Transport Layer to Improve the Stability of Perovskite Solar Cells

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Nano-Micro Letters 2023年第10期15卷 305-316页

作者： Ying zhang Chenxiao Zhou Lizhi Lin Fengtao Pei Mengqi Xiao Xiaoyan Yang Guizhou Yuan cheng Zhu Yu Chen Qi Chen Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory for Low‑Dimensional Quantum Structure and DevicesExperimental Center of Advanced MaterialsSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China

To achieve high power conversion efficiency(PCE) and long-term stability of perovskite solar cells(PSCs), a hole transport layer(HTL) with persistently high conductivity, good moisture/oxygen barrier ability, and adequate passivation capability is important. To achieve enough conductivity and effective hole extraction, spiro-OMe TAD, one of the most frequently used HTL in optoelectronic devices, often needs chemical doping with a lithium compound(LiTFSI). However, the lithium salt dopant induces crystallization and has a negative impact on the performance and lifetime of the device due to its hygroscopic nature. Here, we provide an easy method for creating a gel by mixing a natural small molecule additive(thioctic acid, TA) with spiro-OMe TAD. We discover that gelation effectively improves the compactness of resultant HTL and prevents moisture and oxygen infiltration. Moreover, the gelation of HTL improves not only the conductivity of spiro-OMe TAD, but also the operational robustness of the devices in the atmospheric environment. In addition, TA passivates the perovskite defects and facilitates the charge transfer from the perovskite layer to HTL. As a consequence, the optimized PSCs based on the gelated HTL exhibit an improved PCE(22.52%) with excellent device stability.

关键词： Perovskite solar cell Hole transport layer Gelation Humidity stability Aggregation of LiTFSI

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Antitumor effect of immunization with fusion of dendritic cells and hepatocellular carcinoma cells in mice

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Hepatobiliary & Pancreatic Diseases International 2004年第2期3卷 235-240页

作者： Hao zhang Shu-sen Zheng Guo-Ping Jiang Li-Hua Wu Fen Zhu Zhen-Lin Yang Department of Hepatobiliary Surgery First Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310003 China. haozh@***

BACKGROUND: Important advances have made within the past few years in the treatment of hepatocellular carcinoma (HCC), however, the long-term prognosis after resection of HCC remains unsatisfactory as a result of a high incidence of recurrence. This study was to investigate immunization with fusions of DCs and HCC cells against HCC tumors transplanted to mice.METHODS: Fusion cells of dendritic cells (DCs) and H22 cells were prepared with polyethylene glycol. Expression of MHC and costimulatory molecules by dendritomas were determined by FACs. To study the antitumor immune preventitive and therapeutic effects, fusions were subcutaneously injected into naive or tumor-bearing mice; the CTL activity was assumed by the LDH method, and the expression of tumour necrosis factor-alpha (TNF-alpha) and interferon-gamma(IFN-gamma) in tumors were assayed by reverse transcription-polymerase chain reaction (RT-PCR).RESULTS: The hybridomas of DCs and H22 cells acquired both DCs and H22 cells phenotypes. Immunization of BALB/C mice with DC/H22 fusions induced protective immunity against a high dose of H22 tumor challenge. After treatment with hybridomas, the survival time of tumor-bearing mice was extended. The expression level of TNF-alpha and IFN-gamma mRNA was markedly increased.CONCLUSION: The hybridomas of DCs and H22 cells could induce effective antitumor immune responses and may be potentially used in prevention and management of recurrence and metastasis of HCC.

关键词： dendritic cells hepatocellular carcinoma cell fusion

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Enhancing betavoltaic nuclear battery performance with 3D P^(+)PNN^(+)multi-groove structure via carrier evolution

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Nuclear Science and Techniques 2023年第12期34卷 1-16页

作者： Hou‑Jun He Yun‑cheng Han Xiao‑Yu Wang Yu‑Min Liu Jia‑Chen zhang Lei Ren Ming‑Jie Zheng Hefei Institutes of Physical Science Chinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China School of Nuclear Science and Engineering East China University of TechnologyNanchang 330013China School of Nuclear Technology and Chemistry and Biology Hubei University of Science and TechnologyXianning 437100China

Betavoltaic nuclear batteries offer a promising alternative energy source that harnesses the power of beta particles emitted by *** satisfy the power demands of microelectromechanical systems(MEMS),3D structures have been proposed as a potential ***,this paper introduces a novel 3D^(63)Ni–SiC-based P^(+)PNN^(+)structure with a multi-groove design,avoiding the need for PN junctions on the inner surface,and thus reducing leakage current and power *** Carlo simulations were performed considering the fully coupled physical model to extend the electron–hole pair generation rate to a 3D structure,enabling the efficient design and development of betavoltaic batteries with complex 3D *** a result,the proposed model produces the significantly higher maximum output power density of 19.74μW/cm^(2) and corresponding short-circuit current,open-circuit voltage,and conversion efficiency of 8.57μA/cm^(2),2.45 V,and4.58%,respectively,compared with conventional planar *** analysis of the carrier transport and collection characteristics using the COMSOL Multiphysics code,we provide deep insights regarding power increase,and elucidate the discrepancies between the ideal and simulated performances of betavoltaic *** work offers a promising approach for the design and optimization of high-output betavoltaic nuclear batteries with a unique 3D design,and serves as a valuable reference for future device fabrication.

关键词： Betavoltaic nuclear battery High-output power density Three-dimensional structure Carrier drift–diffusion Carrier recombination Carrier collection efficiency

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Bionic microchannels for step lifting transpiration

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International Journal of Extreme Manufacturing 2023年第2期5卷 244-252页

作者： Zhaolong Wang Qiu Yin Ziheng Zhan Wenhao Li Mingzhu Xie Huigao Duan Ping cheng Ce zhang Yongping Chen Zhichao Dong Interdisciplinary Research Center of Low-carbon Technology and Equipment College of Mechanical and Vehicle EngineeringHunan UniversityChangsha 410082People’s Republic of China MOE Key Laboratory for Power Machinery and Engineering School of Mechanical EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Qian Xuesen Laboratory of Space Technology China Academy of Space Technology(CAST)Beijing 100094People’s Republic of China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Environmental Science and EngineeringSuzhou University of Science and TechnologySuzhouJiangsu 215009People’s Republic of China Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Chinese Academy of Sciences Key Laboratory of Bio-inspired Materials and Interface Sciences Technical Institute of Physics and ChemistryChinese Academy of Sciences100190 BeijingPeople’s Republic of China

Those various cross-sectional vessels in trees transfer water to as high as 100 meters,but the traditional fabrication methods limit the manufacturing of those vessels,resulting in the non-availability of those bionic ***,we fabricate those bionic microchannels with various cross-sections by employing projection micro-stereolithography(PμSL)based 3D printing *** circumradius of bionic microchannels(pentagonal,square,triangle,and five-pointed star)can be as small as 100μm with precisely fabricated sharp ***'s more,those bionic microchannels demonstrate marvelous microfluidic performance with strong precursor effects enabled by their sharp *** significantly,those special properties of our bionic microchannels enable them outstanding step lifting performance to transport water to tens of millimeters,though the water can only be transported to at most 20 mm for a single bionic *** mimicked transpiration based on the step lifting of water from bionic microchannels is also *** precisely fabricated,low-cost,various cross-sectional bionic microchannels promise applications as microfluidic chips,long-distance unpowered water transportation,step lifting,mimicked transpiration,and so on.

关键词： bionic microchannel microfluidics water transportation step lifting 3D printing

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Management hepatolithiasis with operative choledochoscopic FREDDY laser lithotripsy combined with or without hepatectomy

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Hepatobiliary & Pancreatic Diseases International 2013年第2期12卷 160-164页

作者： Zhi-Jun Jiang Ying Chen Wei-Lin Wang Yan Shen Min zhang Hai-Yang Xie Lin Zhou Shu-sen Zheng Division of Hepatobiliary Pancreatic Surgery Department of Surgery First Affiliated Hospital Zhejiang University School of Medicine

BACKGROUND: Hepatolithiasis is very common in East Asia. It is benign in nature, but has a high recurrence rate. It is likely to lead to biliary cirrhosis and increase the risk of cholangiocarcinoma. Hence, the treatment of hepatolithiasis is difficult but vital. In this report, we present a novel approach to manage hepatolithiasis using the choledochoscopic Frequency-Doubled Double pulse Nd:YAG (FREDDY) laser lithotripsy combined with or without hepatectomy. METHODS: Between July 2009 and October 2012, 45 patients underwent choledochoscopic FREDDY laser lithotripsy combined with or without hepatectomy (laser lithotripsy group). Fortyeight patients underwent a traditional operation (traditional method group) from January 2009 to June 2009. Comparative analysis was made of demographic and clinical characteristics of the two groups. RESULTS: The final stone clearance rate of the laser lithotripsy group was 93.3%, whereas that of the traditional method group was 85.4% (P=0.22). In the laser lithotripsy group, 2 patients experienced hemobilia and 3 patients had acute cholangitis. In the traditional method group, 3 patients had intraoperative hemorrhage, 1 patient had bile leakage, 6 patients had acute cholangitis, and 1 patient died of liver failure. Moreover, the operative time in the traditional method group was significantly longer than that in the laser lithotripsy group (P=0.01). The mean hospital stay of the patients in the traditional method group was longer than that in the laser lithotripsy group (9.8 vs8.2 days, P=0.17). Recurrent intrahepatic bile duct stones were not found during the follow-up period in the two groups. CONCLUSION: Operative choledochoscopic FREDDY laser lithotripsy combined with or without hepatectomy may be an effective and safe treatment for hepatolithiasis.

关键词： hepatolithiasis lithotripsy frequency-doubled double pulse Nd:YAG laser hepatectomy choledochoscopy

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Structures and Electromagnetic Properties of Electroless Ni-Co-P Coatings Before and After Annealing

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Journal of Iron and Steel Research International 2012年第S2期19卷 809-812页

作者： zhang Han-zhuo LIU Lei XU cheng School of Mechatronic Engineering China University of Mining and Technology

Ni-Co-P coatings containing Ni 46.13 wt%,Co 45.05 wt%and P 8.82 wt%were electroless-plated on carbon steel substrates and annealed at a series of *** structure of as-plated coatings was amorphous,and crystallization took place around 623 *** annealing the coatings at 823 K for 60 min,stable face-centered cubic Ni(Co) and Ni_3P phase were *** resistivity decreased remarkably by increasing the annealing *** saturation magnetization and coercivity attained their highest values when the coatings were annealed at 723 ***,the Ni-Co-P coatings exhibited semi-hard magnetic characteristics and could be used as magnetic recording materials after annealing.

关键词： Ni-Co-P coatings electroless plating annealing electromagnetic properties

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