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Chinese Journal of Aeronautics 2024年第3期37卷 34-48页

作者： Fanzhi ZENG Tianxin ZHANG Denggao TANG jinping li Chao YAN School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China School of Aeronautical Engineering Air Force Engineering UniversityXi’an 710038China

Accurate prediction of Shock-Wave/Boundary Layer Interaction(SWBli)flows has been a persistent challenge for linear eddy viscosity models.A major limitation lies in the isotropic representation of the Reynolds stress,as assumed under the Boussinesq *** studies have shown promise in improving the prediction capability for incompressible separation flows by perturbing the Reynolds-stress anisotropy ***,it remains uncertain whether this approach is effective for SWBli flows,which involve compressibility and *** address this issue,this study systematically quantifies the structural uncertainty of the anisotropy for oblique SWBli *** eigenspace perturbation method is applied to perturb the anisotropy tensor predicted by the Menter Shear–Stress Transport(SST)model and reveal the impacts of anisotropy on the prediction of quantities of interest,such as separation and reattachment positions,wall static pressure,skin friction,and heat *** results demonstrate the potential and reveal the challenges of eigenspace perturbation in improving the SST ***,a detailed analysis of turbulent characteristics is performed to identify the source of *** findings indicate that eigenspace perturbation primarily affects turbulent shear stress,while the prediction error of the SST model is more related to turbulent kinetic energy.

关键词： Shock-wave/boundary layer interaction(SWBli) Turbulence models Uncertainty analysis Eigenspace perturbation Anisotropy

Electron engineering of nickel phosphide for Ni^(δ+) in electrochemical nitrate reduction to ammonia

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Nano Research 2024年第6期17卷 4864-4871页

作者： Jie Hu Hao Huang Miao Yu Shuang Wang jinping li College of Environmental Science and Engineering Taiyuan University of TechnologyJinzhong 030600China School of Sustainable Energy Materials and Science Jinhua Advanced Research InstituteJinhua 321000China Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization Taiyuan University of TechnologyTaiyuan 030024China

The electrochemical reduction of nitrate to ammonia(ENRA)provides an efficient approach to remove nitrate pollution and achieve ammonia production ***,inspired by bio-enzyme in denitrifying bacteria,a carbon-coated nickel phosphide(NiPC)nanosheet derived from metal-organic frameworks(MOFs)is proposed as an efficient catalyst for *** electron engineering,controllable Ni^(δ+)in nickel phosphide is achieved by regulating the degree of phosphating,which enhances its activity for the hydrogenation of *** the result,Niδ+becomes one of dominating factors determining the efficiency of the ENRA reaction in nickel *** optimal NiPC catalyst exhibits impressive property toward ENRA:NH_(4)^(+)Faraday efficiency of 96.68%,NH4+selectivity of 99.04%,and nitrate conversion rate of 90.43%under low nitrate concentration(200 mg·L^(−1)).This work opens a new avenue for the design of next-generation catalysts through electron engineering for ENRA.

关键词： electron engineering transition metal phosphide nitrate reduction ammonia production metal-organic frameworks

Methyl functionalization of trimesic acid in copper-based metal-organic framework for ammonia colorimetric sensing at high relative humidity

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Chinese Chemical Letters 2024年第6期35卷 211-215页

作者： Yuxin Wang Zhengxuan Song Yutao liu Yang Chen jinping li libo li Jia Yao College of Chemical Engineering and Technology Shanxi Key Laboratory of Gas Energy Efficient and Clean UtilizationTaiyuan University of TechnologyTaiyuan 030024China Department of Gastroenterology Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalThird Hospital of Shanxi Medical UniversityTaiyuan 030024China

Exhaled ammonia(NH_(3))can be used as a crucial biomarker of kidney and liver ***,the high humidity in the detection conditions remains a challenge for accurate detection by gas ***,a copper-based metal-organic framework(CH_(3)-Cu-BTC)with methyl(CH_(3)^(-))functionalization of trimesic acid was synthesized for NH_(3) colorimetric *** CH_(3)-Cu-BTC exhibited a strong response for 5 ppm NH_(3) with high selectivity under high relative humidity(75%RH).Density functional theory(DFT)simulations indicated that the NH_(3) molecules interacted more strongly with CH_(3)-Cu-BTC than H_(2)O molecules did,and the corresponding color switching was attributed to the lone-pair electron in NH_(3) changing the coordination environment of Cu^(2+)ions,leading to an obviously visible color switching response from ruby green to *** on the tailor-made pore chemistry,the precise detection of trace amounts of NH_(3) in exhaled air was realized through functionalized MOF *** strategy used in this study not only offers a new pathway for the rapid detection of low concentration NH_(3) under humid conditions,but also shows a method for early respiration diagnosis of kidney and liver diseases.

关键词： Metal-organic framework Ammonia sensing Naked-eye color switching High humidity Respiration diagnosis

Ethanol extract of Cyathulae Radix inhibits osteoclast differentiation and bone loss

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Chinese Journal of Natural Medicines 2024年第3期22卷 212-223页

作者： SHI liying REN liuyi li jinping liU Xin LU Jingjing JIA Lujuan XIE Baoping TANG Siyuan liU Wei ZHANG Jie Department of Pharmachemistry Xiangya School of Pharmaceutical SciencesCentral South UniversityChangsha 410013China Hunan Key laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases Central South UniversityChangsha 410013China Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases Ministry of EducationGannan Medical UniversityGanzhou 341000China Xiangya Nursing School Central South UniversityChangsha 410013China The Third Xiangya Hospital Central South UniversityChangsha 410013China

Cyathulae Radix,a traditional Chinese medicine and a common vegetable,boasts a history spanning *** enhances bone density,boosts metabolism,and effectively alleviates osteoporosis-induced *** its historical use,the molecular mechanisms behind Cyathulae Radix’s impact on osteoporosis remain *** this study,we investigated the effects and mechanisms of Cyathulae Radix ethanol extract(CEE)in inhibiting osteoporosis and ***-week-old female mice underwent ovariectomy and were treated with CEE for eight ***-computed tomography(micro-CT)assessed histomorphometric parameters,bone tissue staining observed distal femur histomorphology,and three-point bending tests evaluated tibia mechanical ***-linked immunosorbent assay(EliSA)measured serum estradiol(E2),receptor activator for nuclear factor B ligand(RANKL),and osteoprotegerin(OPG)***-related markers were analyzed via Western blotting(WB)and quantitative real-time polymerase chain reaction(qRT-PCR).Additionally,CEE effects on RANKL-induced osteoclast formation and bone resorption were investigated in vitro using tartrate-resistant acid phosphatase(TRAP)staining,qRT-PCR,and WB *** with the ovariectomy(OVX)group,CEE treatment enhanced trabecular bone density,maximal load-bearing capacity,and various histomorphometric *** E2 and OPG levels significantly increased,while Receptor activator of nuclear factor-κB(RANK)decreased in the CEE *** downregulated matrix metallopeptidase 9(MMP-9),Cathepsin K(CTSK),and TRAP gene and protein *** bone marrow macrophages(BMMs),CEE reduced mature osteoclasts,bone resorption pit areas,and MMP-9,CTSK,and TRAP expression during osteoclast *** with DMSO treatment,CEE markedly inhibited RANK,TNF receptor associated factor 6(TRAF6),Proto-oncogene c-Fos(c-Fos),Nuclear factor of activated T-cells cytoplasmic 1(NFATc1)expressions,and Extracellular regula

关键词： Osteoporosis Osteoclast BMMs Cyathulae Radix RANKL ER/RANK/NFATc1 signaling pathway

Porous framework materials for energy&environment relevant applications:A systematic review

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Green Energy & Environment 2024年第2期9卷 217-310页

作者： Yutao liu liyu Chen lifeng Yang Tianhao Lan Hui Wang Chenghong Hu Xue Han Qixing liu Jianfa Chen Zeming Feng Xili Cui Qianrong Fang Hailong Wang libo li Yingwei li Huabin Xing Sihai Yang Dan Zhao jinping li College of Chemical Engineering and Technology Shanxi Key Laboratory of Gas Energy Efficient and Clean UtilizationTaiyuan University of TechnologyTaiyuan030024China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou510640China Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China Department of Chemistry The University of ManchesterManchesterM139PLUK Department of Chemical and Biomolecular Engineering National University of SingaporeSingapore 117585Singapore ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou311215China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry Jilin UniversityChangchun130012China Beijing Key Laboratory for Science and Application of Functional Molecular and Crystalline Materials Department of ChemistryUniversity of Science and Technology BeijingBeijing100083China

Carbon peaking and carbon neutralization trigger a technical revolution in energy&environment related *** of new technologies for green energy production and storage,industrial energy saving and efficiency reinforcement,carbon capture,and pollutant gas treatment is in highly imperious *** emerging porous framework materials such as metal–organic frameworks(MOFs),covalent organic frameworks(COFs)and hydrogen-bonded organic frameworks(HOFs),owing to the permanent porosity,tremendous specific surface area,designable structure and customizable functionality,have shown great potential in major energy-consuming industrial processes,including sustainable energy gas catalytic conversion,energy-efficient industrial gas separation and ***,this manuscript presents a systematic review of porous framework materials for global and comprehensive energy&environment related applications,from a macroscopic and application perspective.

关键词： Porous framework materials Catalysis Separation Gas storage Carbon neutrality

Ethanol extract of Cyathulae Radix inhibits osteoclast differentiation and bone loss

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Chinese Journal of Natural Medicines 2024年第03期 212-223页

作者： SHI liying REN liuyi li jinping liU Xin LU Jingjing JIA Lujuan XIE Baoping TANG Siyuan liU Wei ZHANG Jie Department of Pharmachemistry Xiangya School of Pharmaceutical Sciences Central South University Hunan Key laboratory of Diagnostic and Therapeutic Drug Research for Chronic Diseases Central South University Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases Ministry of Education Gannan Medical University Xiangya Nursing School Central South University The Third Xiangya Hospital Central South University

Cyathulae Radix, a traditional Chinese medicine and a common vegetable, boasts a history spanning millennia. It enhances bone density, boosts metabolism, and effectively alleviates osteoporosis-induced pain. Despite its historical use, the molecular mechanisms behind Cyathulae Radix's impact on osteoporosis remain unexplored. In this study, we investigated the effects and mechanisms of Cyathulae Radix ethanol extract（CEE） in inhibiting osteoporosis and osteoclastogenesis. Eight-week-old female mice underwent ovariectomy and were treated with CEE for eight weeks. Micro-computed tomography（micro-CT） assessed histomorphometric parameters, bone tissue staining observed distal femur histomorphology, and three-point bending tests evaluated tibia mechanical properties. Enzyme-linked immunosorbent assay（EliSA） measured serum estradiol（E2）, receptor activator for nuclear factor B ligand（RANKL）, and osteoprotegerin（OPG） levels. Osteoclastogenesis-related markers were analyzed via Western blotting（WB） and quantitative real-time polymerase chain reaction（qRT-PCR）. Additionally, CEE effects on RANKL-induced osteoclast formation and bone resorption were investigated in vitro using tartrate-resistant acid phosphatase（TRAP） staining, qRT-PCR, and WB assay. Compared with the ovariectomy（OVX） group, CEE treatment enhanced trabecular bone density, maximal load-bearing capacity, and various histomorphometric parameters. Serum E2 and OPG levels significantly increased, while Receptor activator of nuclear factor-κB（RANK） decreased in the CEE group. CEE downregulated matrix metallopeptidase 9（MMP-9）, Cathepsin K（CTSK）, and TRAP gene and protein expression. In bone marrow macrophages（BMMs）, CEE reduced mature osteoclasts, bone resorption pit areas, and MMP-9, CTSK, and TRAP expression during osteoclast differentiation. Compared with DMSO treatment, CEE markedly inhibited RANK,TNF receptor associated factor 6（TRAF6）, Proto-oncogene c-Fos（c-Fos）, Nuclear factor of activated T-cells cytoplasm

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代谢健康型超重/肥胖与新发糖尿病的相关性研究

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中华内分泌代谢杂志 2024年第6期40卷 470-474页

作者：刘婧李金平宁夏医科大学总医院日间病房银川750003 宁夏医科大学总医院肿瘤外一科银川750003

目的探讨中国成年人代谢健康型超重/肥胖(metabolically healthy overweight/obesity,MHO)与新发糖尿病的相关性。方法本研究是对一项回顾性队列研究的二次分析,选取2010年至2016年于中国瑞慈集团相关医疗机构进行健康体检的117056名中... 详细信息

目的探讨中国成年人代谢健康型超重/肥胖(metabolically healthy overweight/obesity,MHO)与新发糖尿病的相关性。方法本研究是对一项回顾性队列研究的二次分析,选取2010年至2016年于中国瑞慈集团相关医疗机构进行健康体检的117056名中国成年人作为研究对象,根据基线体重指数和代谢状态分为代谢健康型非肥胖(metabolically healthy non-obesity,MHNO)组、MHO组、代谢不健康型非肥胖(metabolically unhealthy non-obesity,MUNO)组和代谢不健康型超重/肥胖(metabolically unhealthy overweight/obesity,MUO)组。采用Kaplan-Meier法(log-rank检验)估计各组的糖尿病累积发病率,采用Cox比例风险模型估计不同肥胖代谢表型组别的糖尿病发病风险HR(95%CI),并进行亚组分析。结果纳入的117056名中国成年人中,MHO占总人群的24.3%。经过平均(3.1±1.0)年的随访,共有2685例糖尿病新发病例,累积发病率为2.3%。MHNO、MHO、MUNO和MUO组的累积发病率分别为0.5%、1.6%、4.8%和7.9%,组间比较差异有统计学意义(χ2=1224.164,P<0.001)。Cox比例风险模型分析显示,在校正性别、年龄、空腹血糖、吸烟、饮酒及糖尿病家族史之后,MHO组人群新发糖尿病风险是MHNO组的2.19倍(95%CI 1.89~2.55),而MUNO和MUO组人群发生糖尿病事件的HR值分别为2.25(95%CI 1.93~2.64)和3.00(95%CI 2.61~3.45)。结论中国成年人中,MHO与新发糖尿病风险升高有显著相关性。

关键词：成年人代谢健康型超重/肥胖糖尿病

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中国多元林草原料生物质资源分布及醇类利用指标分析

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农业工程学报 2024年第6期40卷 298-308页

作者：王浩王昱李金平雷廷宙田苗李能安兰州理工大学能源与动力工程学院兰州730000 中国科学院西北生态环境资源研究院内陆河流域生态水文重点实验室兰州730000 甘肃省生物质能与太阳能互补供能系统重点实验室兰州730050 常州大学城乡矿山研究院常州213164

中国林草原料资源丰富,对其分布的整理不仅有助于推动林草原料的综合利用,也有助于解决林草废弃物带来的环境问题。因此,该研究根据中国大陆地区的地理经纬度,对全国范围内的代表性林草原料进行了分区梳理,并筛选出了各地区的优势林草... 详细信息

中国林草原料资源丰富,对其分布的整理不仅有助于推动林草原料的综合利用,也有助于解决林草废弃物带来的环境问题。因此,该研究根据中国大陆地区的地理经纬度,对全国范围内的代表性林草原料进行了分区梳理,并筛选出了各地区的优势林草作物。对多元林草原料的分布与组成特性,水分、挥发分、纤维素含量、半纤维素含量、C元素含量、O元素含量、热值等进行了共性和个性指标的整理,确定了多元林草原料组成与结构分析的数据库检索字段。华东地区甜菜并不适宜作为生物质醇类利用中林草原料,氧元素含量较其他林草原料高出46%,玉米秸秆和水稻秸秆中O元素含量较低,适宜作为生物质醇类利用中林草原料;大豆中纤维素含量明显较低,比其他林草原料低40%,西南地区玉米秸秆高于其他林草原料;西北地区黑麦草和华东地区华南地区甘蔗的比热容值较高,在3.2~4.8 J/(kg·K),其他能源草比热容值多处于0.8~2.4 J/(kg·K)。深入分析各地区代表性林草原料作为醇类利用的指标,探讨多元林草原料的物理性质、化学组成、工业组成、元素组成以及醇类利用潜力的差异性、变异性和相关性。该研究为中国多元林草醇类利用提供了重要的基础支撑和数据参考。

关键词：醇类利用多元林草数据库理化特性

美国成年女性血清25-羟维生素D水平与全因死亡风险的相关性

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中华健康管理学杂志 2024年第6期18卷 421-427页

作者：刘婧李金平田田马芳宁夏医科大学总医院日间病房银川750004 宁夏医科大学总医院肿瘤外一科银川750004 银川市妇幼保健院检验科银川750001 石嘴山市第一人民医院肾脏血液科石嘴山753200

目的分析美国成年女性血清25-羟维生素D[25(OH)D]水平与全因死亡风险的相关性。方法本研究为回顾性队列研究,资料来源于美国国家健康与营养调查数据库2011—2016年数据,共纳入6452例资料完整的美国成年女性为研究对象,以发生全因死亡为... 详细信息

目的分析美国成年女性血清25-羟维生素D[25(OH)D]水平与全因死亡风险的相关性。方法本研究为回顾性队列研究,资料来源于美国国家健康与营养调查数据库2011—2016年数据,共纳入6452例资料完整的美国成年女性为研究对象,以发生全因死亡为终点事件。根据血清25(OH)D<25.0 nmol/L、25.0~49.9 nmol/L、50.0~74.9 nmol/L和≥75.0 nmol/L分为严重缺乏组(285例)、缺乏组(1695例)、不足组(2119例)和充足组(2353例)。将血清25(OH)D水平作为连续变量和分类变量分别纳入Cox比例风险模型,估计全因死亡风险。采用限制性立方样条拟合Cox回归模型观察血清25(OH)D连续变化与全因死亡风险的曲线关系,采用二分段线性回归模型分析饱和阈值效应,分析美国成年女性血清25(OH)D水平与全因死亡风险的相关性。结果6452例女性血清25(OH)D水平为(68.2±31.6)nmol/L,仅36.5%(2353/6452)的女性血清25(OH)D水平充足。随访时间(5.8±1.8)年,共有375例发生死亡,累积全因死亡率为5.8%。经多因素校正后,血清25(OH)D水平每增加10 nmol/L,全因死亡风险降低5%(HR=0.95,95%CI:0.91~0.98)(P<0.05)。血清25(OH)D充足组全因死亡风险较严重缺乏组低54%(HR=0.46,95%CI:0.29~0.75)(P<0.05,P趋势<0.001)。血清25(OH)D与全因死亡风险之间存在“L”形非线性关联(P=0.007),且存在拐点,当25(OH)D<128.5 nmol/L时,25(OH)D每增加10 nmol/L,全因死亡风险降低8%(HR=0.92,95%CI:0.88~0.96)(P<0.001)。结论美国成年女性高血清25(OH)D水平与低全因死亡风险呈非线性相关,维持足够的维生素D水平可能降低女性死亡风险。

关键词：女(雌)性成年人 25-羟维生素D 死亡率相关性

基于多氮唑配体制备金属有机框架用于乙炔吸附分离

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科学通报 2024年第16期69卷 2278-2287页

作者：王恺华陈杨王毅陈久弘李晋平李立博太原理工大学化学工程与技术学院太原030024 气体能源高效清洁利用山西省重点实验室太原030024

电石法制备的乙炔(C_(2)H_(2))中会混入氮气、氧气和二氧化碳等杂质组分,为获得高纯度乙炔,相应的纯化分离研究十分必要.金属有机框架(metal organic framework,MOF)材料是一种具有超高孔隙率和易于功能化的多孔材料.基于特殊的孔腔特点... 详细信息

电石法制备的乙炔(C_(2)H_(2))中会混入氮气、氧气和二氧化碳等杂质组分,为获得高纯度乙炔,相应的纯化分离研究十分必要.金属有机框架(metal organic framework,MOF)材料是一种具有超高孔隙率和易于功能化的多孔材料.基于特殊的孔腔特点,该类材料在气体吸附分离领域展现出优异的性能.本研究以一水合乙酸铜和5-(4-吡啶基)-1H-四唑为原料,制备了一种新的MOF材料——Cu(Hptz),命名为TYUT-15.该材料基于特殊的方形孔腔结构和多氮吸附位点触发了孔中乙炔分子间的偶极矩协同吸附,在主客体的共同作用下极大地提高了乙炔的吸附容量.采用单晶X射线衍射、同步热重分析、单组分气体吸附及混合气体穿透测试等对样品的结构及气体吸附分离性能进行了表征.分离实验表明,该材料可以从C_(2)H_(2)/CO_(2)/N_(2)/O_(2)四组分混合气体中直接捕集C_(2)H_(2).

关键词：乙炔二氧化碳金属有机框架混合气体分离