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Chinese Chemical Letters 2023年第6期34卷 426-431页

作者： Aiping Chen Yue Zhong Yunxiao Liu zhancheng xie Hanyu Wu Wei Shi Wenlong Huang Renxiang Tan Hai Qian College of Pharmacy Nanjing University of Chinese MedicineNanjing 210023China Center of Drug Discovery State Key Laboratory of Natural MedicinesChina Pharmaceutical UniversityNanjing 210009China Jiangsu Key Laboratory of Drug Discovery for Metabolic Disease China Pharmaceutical UniversityNanjing 210009China

The abnormal activation of BRD4 accelerates the progression of acute myeloid leukemia(AML),developing more precise therapeutics to intervene BRD4 promise to be an excellent opportunity to avoid current limitations of chemotherapy in ***,a range of small-molecule PROTACs with the privileged 8-methyl-pyrrolo[1,2-a]pyrazin-1(2H)-one scaffold were rationally designed,which harbored different carbon or ethylenedioxy chains to degrade BRD4 mediated by the E3 ubiquitin ligase *** them,the most potential B24 exhibited remarkable BRD4 degradation and excellent anti-proliferative activities in MV4-11 cells,with values of DC_(50)and IC_(50)for 0.75 nmol/L and 0.4 nmol/L,respectively,which were better than the BRD4 inhibitor(+)-***,this compound could time-dependently degrade the target protein in the BRD4-,CRBN-,and proteasome-dependent ***,B24 dramatically decreased the level of proto-oncogene c-Myc,and induced cell apoptosis by arresting the cell cycle in G0/G1 phase,down-regulating Bcl-2 and up-regulating Bax to amplify apoptotic *** proof-of-concept study also highlighted the feasibility of BRD4-based PROTACs as a more powerful strategy against AML.

关键词： Acute myeloid leukemia BRD4 PROTACs Protein degradation Apoptosis

骨碎补总黄酮联合全身振动对绝经后骨质疏松性椎体压缩性骨折术后的影响

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中国骨质疏松杂志 2017年第9期23卷 1199-1203页

作者：谢占成青海省海西州人民医院骨科青海海西州817000

目的评价骨碎补总黄酮联合全身振动(whole-body vibration,WBV)对绝经后骨质疏松性椎体压缩性骨折PVP术后的影响。方法 129例的绝经后骨质疏松性椎体压缩性骨折纳入本研究,随机分为骨碎补总黄酮组、全身振动组及联合治疗组,所有患者均... 详细信息

目的评价骨碎补总黄酮联合全身振动(whole-body vibration,WBV)对绝经后骨质疏松性椎体压缩性骨折PVP术后的影响。方法 129例的绝经后骨质疏松性椎体压缩性骨折纳入本研究,随机分为骨碎补总黄酮组、全身振动组及联合治疗组,所有患者均接受经皮椎体成形术(PVP)治疗;骨碎补总黄酮组术后给予骨碎补总黄酮治疗,全身振动组术后给予全身振动治疗;联合治疗组术后给予骨碎补总黄酮联合全身振动治疗,治疗为期6个月。对3组患者治疗前后的疼痛VAS评分、腰椎及髋部骨密度、血清总碱性磷酸酶(alkaline phosphatase,ALP)、血清Ⅰ型胶原羧基端肽交联(carboxy-telopeptide of type I collagen,β-CTX)及血钙(Ca)、磷(P)变化情况进行对比,同时对患者服药后的不良反应发生率进行比较。结果治疗6个月后3组患者VAS评分均较治疗前有明显改善(P0.05)。结论骨碎补总黄酮联合全身振动降低绝经后骨质疏松椎体压缩性骨折PVP术后VAS评分,且能改善髋部腰椎骨密度,安全性较高,值得在临床中推广应用。

关键词：骨碎补总黄酮全身振动骨质疏松性椎体压缩性骨折临床疗效经皮椎体成形术

Mass extinctions, their causes and consequences: an interview with Douglas *** and Shuzhong Shen

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National Science Review 2024年第1期11卷 66-70页

作者： Shucheng xie State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences at Wuhan

‘Mass extinctions’ have been a hot topic for several decades. What triggers a mass extinction? How does a mass extinction impact the evolution of life? How does our ecosystem recover after a mass extinction? These questions attracted the interest of both scientists and the public *** spoke to two renowned researchers in the field of mass extinctions: Prof. Douglas H. Erwin from the National Museum of Natural History of the USA, and Prof. Shuzhong Shen from Nanjing University, China.

关键词： Stratigraphy

海水泵轴失效分析与Incoloy 925合金在船用柴油机上的应用

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热加工工艺 2019年第8期48卷 212-213,218页

作者：高博谢占成申世坤中国人民解放军海军驻兴平军代表室陕西兴平713105 陕西柴油机重工有限公司陕西兴平713105

某型船用大功率柴油机机带海水冷却泵轴,最初选用材料为1Cr17Ni2钢,该钢经调质处理后,抗拉强度≥860 MPa,但在服役期间,该轴多次发生了断裂失效事故。经材料分析对比后选用了Incoloy925高温镍基合金制作柴油机机带海水冷却泵轴。结果表... 详细信息

某型船用大功率柴油机机带海水冷却泵轴,最初选用材料为1Cr17Ni2钢,该钢经调质处理后,抗拉强度≥860 MPa,但在服役期间,该轴多次发生了断裂失效事故。经材料分析对比后选用了Incoloy925高温镍基合金制作柴油机机带海水冷却泵轴。结果表明,经固溶+两次时效处理后,Incoloy925合金抗拉强度≥965 MPa,经装船1000 h试验后,Incoloy925合金海水冷却泵轴各项性能指标均满足设计要求,再未发生断裂失效问题。

关键词：海水冷却泵轴 Incoloy 925 高温镍基合金固溶+两次时效

Turbulence Statistics of Thermo-Buoyancy Supercritical Fuel Flow in a Regenerative Cooling Channel

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Journal of Thermal Science 2024年第1期33卷 126-137页

作者： SUN Feng xie Gongnan School of Marine Science and Technology Northwestern Polytechnical UniversityXi'an 710072China Department of Thermal Engineering Tsinghua UniversityBeijing 100084China

Active regenerative cooling with supercritical hydrocarbon fuel is considered as the most promising thermal protection *** existence of buoyancy force would lead to strongly anisotropic flow and thermal transport *** is closely related to the cooling performance of the *** elucidate the mechanisms of turbulent transport,the large eddy simulation(LES) was performed to assess turbulence statistics within different turbulence *** results indicated that the buoyancy and inertial force together dominated the change of turbulent ***,the spatial thermal buoyancy effect significantly suppressed the vertical velocity *** is due to the laminar motion caused by the buoyancy force,thereby weakening the thermal *** the statistics of velocity fluctuation,it was found that the buoyancy force and inertial force greatly weaken the vertical and streamwise velocity fluctuation,*** the statistics of thermal transport,the results pointed out that the near-wall heat transport characteristics need to be paid more *** thickness of the temperature mixing boundary layer led to the attenuation of vertical heat flux,which inhibited vertical temperature diffusion and predisposed to extreme conditions of heat transfer *** results can enhance the academic understanding of the heat transfer mechanism of supercritical fluids,and give guidance for further applications of thermal protection.

关键词： active regenerative cooling large eddy simulation(LES) buoyancy force turbulence statistics

Output feedback stabilization of stochastic high-order planar nonlinear systems with stochastic inverse dynamics and output-constraint

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Science China(Information Sciences) 2024年第3期67卷 182-196页

作者： Ruiming xie Shengyuan XU Nanjing University of Science and Technology School of Automation

In this paper, we solve the output feedback control problem of stochastic high-order planar nonlinear systems with output constraint and stochastic integral input-to-state stability(SiISS) inverse dynamics. By employing a key coordinate transformation, a stochastic nonlinear system with output constraint and SiISS inverse dynamics is converted into an unconstrained system. By skillfully constructing an observer and adopting SiISS small-gain conditions, we develop a new output feedback control design and analysis method, and prove that all the closed-system signals are bounded almost surely, the output constraint is not violated almost surely, and the equilibrium point of the closed-loop system is stochastically asymptotically stable.

关键词： stochastic high-order planar nonlinear system outputconstraint stochastic inverse dynamics output feedbackstabilization stochastic integral input-to-state stability(SiISS)

Fixed-time stabilization of output-constrained stochastic high-order nonlinear systems

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Science China(Information Sciences) 2024年第4期67卷 5-20页

作者： Ruiming xie Shengyuan XU Nanjing University of Science and Technology School of Automation

In this study, the fixed-time stabilization problem of stochastic high-order nonlinear systems with output constraint and high-order and low-order nonlinearities is addressed. A new coordinate transformation is employed to directly convert output-constrained stochastic systems into an equivalent unconstrained *** fully extracting the characteristics of system nonlinearities and using the stochastic fixed-time stability theorem, a new design and analysis method is constructed to guarantee that the trivial solution of the closed-loop system is stochastically fixed-time stable while fulfilling the output constraint.

关键词： stochastic high-order nonlinear system outputconstraint high-order and low-order nonlinearity fixed-timestabilization finite-time stabilization

Review of the research on the development and utilization of clay-type lithium resources

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Particuology 2024年第4期87卷 46-53页

作者： Ruiqi xie Zhihui Zhao Xiong Tong Xian xie Qiang Song Peiqiang Fan Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming650093China Yunnan Engineering Research Center for Metal Tailings Resource Utilization Kunming650093China

Since the demands for lithium have been in explosive growth recently and several great clay lithium resources were founded in China,the development and utilization of clay-type lithium resources become a hot *** order to provide a guidance for the concentration and extracting lithium of clay-type lithium resources,this review systematically summarized the main types and characteristics of clay-type lithium resources and the research status of lithium extraction from clay lithium ***,the flotation research status of the main mineral of clay lithium ore was also ***,we discussed the difficulties in the development and utilization of clay-type lithium ore and put forward the subsequent research *** paper can provide a guidance for the con-centration and extracting lithium of clay-type lithium resources in the future.

关键词： Clay lithium Clay mineral flotation Lithium extraction Leaching

Conductive and stable polyphenylene/CNT composite membrane for electrically enhanced membrane fouling mitigation

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Frontiers of Environmental Science & Engineering 2024年第1期18卷 35-47页

作者： Huijuan xie Haiguang Zhang Xu Wang Gaoliang Wei Shuo Chen xie Quan Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

Nanocarbon-based conductive membranes, especially carbon nanotube (CNT)-based membranes, have tremendous potential for wastewater treatment and water purification because of their excellent water permeability and selectivity, as well as their electrochemically enhanced performance (e.g., improved antifouling ability). However, it remains challenging to prepare CNT membranes with high structural stability and high electrical conductivity. In this study, a highly electroconductive and structurally stable polyphenylene/CNT (PP/CNT) composite membrane was prepared by electropolymerizing biphenyl on a CNT hollow fiber membrane. The PP/CNT membrane showed 3.4 and 5.0 times higher electrical conductivity than pure CNT and poly(vinyl alcohol)/CNT (PVA/CNT) membranes, respectively. The structural stability of the membrane was superior to that of the pure CNT membrane and comparable to that of the PVA/CNT membrane. The membrane fouling was significantly alleviated under an electrical assistance of −2.0 V, with a flux loss of only 11.7% after 5 h filtration of humic acid, which is significantly lower than those of PP/CNT membranes without electro-assistance (56.8%) and commercial polyvinylidene fluoride (PVDF) membranes (64.1%). Additionally, the rejection of negatively charged pollutants (humic acid and sodium alginate) was improved by the enhanced electrostatic repulsion. After four consecutive filtration-cleaning cycle tests, the flux recovery rate after backwashing reached 97.2%, which was much higher than those of electricity-free PP/CNT membranes (67.0%) and commercial PVDF membranes (61.1%). This study offers insights into the preparation of stable conductive membranes for membrane fouling control in potential water treatment applications.

关键词： Polyphenylene CNTs Membrane Electro-assistance Membrane fouling mitigation

Extract lithium from clay-type lithium ore by mixed acid and its mechanism Author links open overlay panel

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Particuology 2024年第8期91卷 323-332页

作者： Wuchang Zhou Ruiqi xie Xiong Tong Xian xie Yang Liu Zhihui Zhao Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming650093China Technology Innovation Center for Comprehensive Utilization of Strategic Mineral Resources Ministry of Natural ResourcesChengdu610041China National&Regional Engineering Research Center for Green comprehensive Utilization of Tailing Resources from Metal Minerals Kunming650093China

A roasting-leaching test was carried out for the efficient utilization of clay-type lithium ore in the central region of Yunnan *** test used the mixed acid of sulfuric acid and phosphoric acid as the leaching *** the conditions of roasting temperature of 600℃,roasting time of 1 h,liquid-solid ratio of 5:1,volume ratio of H_(2)SO_(4)solution to H_(3)PO_(4)solution of 45:5,leaching time of 2 h and leaching temperature of 80℃,the leaching rate of lithium was as high as 97.83%.The leaching mechanism was studied by SEM,pore property analysis,XRD and *** was found that the morphology of the ore changed obviously after roasting and leaching,and a certain degree of collapse and fragmentation occurred,which provided favorable spatial conditions for the leaching of *** porosity,total intrusion volume and total pore area also increased after roasting and leaching,thus promoting the leaching of Li^(+).The results showed that chemical reaction taken placed during the roasting and *** phase of the sample changed from chlorite,kaolinite and diaspore(boehmite)mainly to corundum,hematite,periclase and quartz after ***,after leaching,no new phase was produced in the ore sample,and no S and P elements were found on the surface of the ore sample,indicating that the leaching mechanism of lithium might be the ion exchange between H^(+)and Li^(+).

关键词： Clay-type lithium ore Lithium extraction Roasting Leaching