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Ce-and La-doped polymetallic layered double hydroxides for enhanced oxygen evolution reaction performance at high current density

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Science China Chemistry 2024年第8期67卷 2586-2598页

作者： Rinel R.Kimaka P. ping Wang miao He Senyao Meng Jiasai Yao Huawei li Cheng Yang Zhenxing li State Key Laboratory of Heavy Oil Processing College of New Energy and MaterialsChina University of Petroleum(Beijing)Beijing 102249China

Polymetallic layered double hydroxides are promising cost-effective catalysts for the oxygen evolution reaction(OER) due to their versatile anionic and cationic tunability. Nevertheless, several challenges persist, notably, issues related to low electrical conductivity, poor catalytic activity, and stability, especially at high current density. Herein, we report the design of Ce-and Ladoped Co Ni Fe-layered double hydroxide(Ce La Co Ni Fe-LDH) nanosheets through a facile and scalable in situ self-assembly strategy that displays enhanced OER activity. Experimental and theoretical investigations provide insights into the impact of Ceand La-doping by comparing Ce Co Ni Fe-LDH, La Co Ni Fe-LDH, and pristine Co Ni Fe-LDH, all synthesized using the same methodology. These results reveal that doping Ce^(3+)and La^(3+)into Co Ni Fe-LDH substantially improves its electronic structure,resulting in enhanced conductivity, more oxygen vacancies(Vo), electron interaction, and active site formation. Consequently,significantly reduced overpotentials of 175, 314, and 424 m V at 10, 100, and 500 m A cm^(-2), respectively, and a highly stable current density of 120 h in 1 M KOH were achieved. Notably, these performance metrics surpass those of unmodified LDHs and are competitive with many lanthanide-doped transition metal-based LDH electrocatalysts, as well as noble metal catalysts like ruthenium catalysts. This work represents a pioneering effort in doping Ce^(3+)and La^(3+)ions into a functional Co Ni Fe-based electrocatalyst, offering inspiring OER performance and scalability potential.

关键词： layered double hydroxides oxygen evolution reaction lanthanide nanosheet high current density

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热应激条件下黄羽肉鸡饮用发酵菌液对其生长性能的影响

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粮食与饲料工业 2024年第3期 44-46页

作者：刘松柏张晗玥覃健萍谭会泽张齐杜云平邹轶杨露苗丽萍陈将张祥斌温氏食品集团股份有限公司广东云浮527400 农业农村部动物营养与健康养殖重点实验室广东云浮527400 华南农业大学动物科学学院广东广州510642

试验旨在研究热应激条件下黄羽肉鸡饮用发酵菌液对其生产性能的影响。选取65日龄、体重接近的黄羽肉鸡1 088只,随机分成2组,每组有8个重复,每个重复68只鸡。在热应激的条件下,对照组肉鸡饮用正常自来水,试验组饮用发酵菌液,试验期10 d... 详细信息

试验旨在研究热应激条件下黄羽肉鸡饮用发酵菌液对其生产性能的影响。选取65日龄、体重接近的黄羽肉鸡1 088只,随机分成2组,每组有8个重复,每个重复68只鸡。在热应激的条件下,对照组肉鸡饮用正常自来水,试验组饮用发酵菌液,试验期10 d。研究结果表明,在热应激条件下黄羽肉鸡饮用发酵菌液能显著改善肉鸡日均采食量、日均增重及耗料增重比(P0.05)。综上所述,在热应激条件下,黄羽肉鸡饮用发酵菌液能有效改善其生长性能。

关键词：热应激黄羽肉鸡发酵菌液

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Advancements in precision nanomedicine design targeting the anoikis-platelet interface of circulating tumor cells

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3457-3475页

作者： Manqing Tang Zhijie Zhang ping Wang Feng Zhao lin miao Yuming Wang Yingpeng li Yunfei li Zhonggao Gao College of Chinese Materia Medica Tianjin University of Traditional Chinese MedicineTianjin 301617China State Key Laboratory of Component-Based Chinese Medicine Tianjin University of Traditional Chinese MedicineTianjin 301617China State Key Laboratory of Bioactive Substance and Function of Natural Medicines Institute of Materia MedicaChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050China

Tumor metastasis,the apex of cancer progression,poses a formidable challenge in therapeutic *** tumor cells(CTCs),resilient entities originating from primary tumors or their metastases,significantly contribute to this process by demonstrating remarkable *** survive shear stress,resist anoikis,evade immune surveillance,and thwart *** comprehensive review aims to elucidate the intricate landscape of CTC formation,metastatic mechanisms,and the myriad factors influencing their *** signaling pathways,such as integrin-related signaling,cellular autophagy,epithelial-mesenchymal transition,and interactions with platelets,are examined in ***,we explore the realm of precision nanomedicine design,with a specific emphasis on the anoikis‒platelet *** innovative approach strategically targets CTC survival mechanisms,offering promising avenues for combatting metastatic cancer with unprecedented precision and *** review underscores the indispensable role of the rational design of platelet-based nanomedicine in the pursuit of restraining CTC-driven metastasis.

关键词： CTCs Anoikis Platelet Cancer stem cell Metastasis Platelet‒CTC interaction Platelet targeting Nanomedicines

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植酸酶高剂量添加条件下日粮不同微量元素含量对笼养肉鸡生长与屠宰性能的影响

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粮食与饲料工业 2024年第2期 56-59页

作者：刘松柏张祥斌张齐邹轶杨露苗丽萍黎鸿彬陈将谭会泽温氏食品集团股份有限公司/农业农村部动物营养与健康养殖重点实验室广东云浮527400

试验旨在研究日粮高剂量添加植酸酶情况下不同微量元素含量对笼养肉杂鸡生长性能与屠宰性能的影响。将864只1日龄公鸡随机分为2个组(对照组日粮添加铜10 mg/kg,铁60 mg/kg,锰60 mg/kg,锌80 mg/kg,碘0.8 mg/kg,硒0.30 mg/kg;试验组微量... 详细信息

试验旨在研究日粮高剂量添加植酸酶情况下不同微量元素含量对笼养肉杂鸡生长性能与屠宰性能的影响。将864只1日龄公鸡随机分为2个组(对照组日粮添加铜10 mg/kg,铁60 mg/kg,锰60 mg/kg,锌80 mg/kg,碘0.8 mg/kg,硒0.30 mg/kg;试验组微量元素添加量减半),每组8个重复,每个重复54只鸡。试验周期50 d。研究结果表明:日粮添加2000 IU/kg植酸酶,试验组日粮微量元素减量添加后能显著(P0.05)。日粮中不同的微量元素添加量对肉杂鸡的屠宰率、全净膛率、胸肌率、腹脂率均无显著(P>0.05)影响。总之,在植酸酶高剂量添加的情况下降低日粮微量元素添加量对笼养肉杂鸡生长性能无负面影响,对日均增重和耗料增重比有明显的改善作用。

关键词：肉杂鸡微量元素植酸酶生长性能屠宰性能

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Efficacy of Raw Corn Starch in Insulinoma-Related Hypoglycemia:A Promising Supportive Therapy

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Chinese Medical Sciences Journal 2024年第2期39卷 102-110页

作者： Rong-Rong li Wei Chen Xin-Hua Xiao miao Yu Fan ping lian Duan Department of Clinical Nutrition Beijing Key Laboratory of the Innovative Development of Functional Staple and the Nutritional Intervention for Chronic DiseaseChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Department of Endocrinology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China

Objective To investigate the efficacy of raw corn starch(RCS)in clinical management of insulinoma-induced *** We retrospectively collected clinical data of insulinoma patients who received RCS-supplemented diet preoperatively,and analyzed the therapeutic effects of the RCS intervention on blood glucose control,weight change,and its adverse *** The study population consisted of 24 cases of insulinoma patients,7 males and 17 females,aged 46.08±14.15 *** RCS-supplemented diet,all patients had frequent hypoglycemic episodes(2.51±3.88 times/week),concurrent with neuroglycopenia(in 83.3% of patients)and autonomic manifestations(in 75.0% of patients),with the median fasting blood glucose(FBG)of 2.70(interquartile range[IQR]:2.50-2.90)mmol/*** patients'weight increased by 0.38(IQR:0.05-0.65)kg per month,with 8(33.3%)cases developing overweight and 7(29.2%)cases developing *** patients maintained the RCS-supplemented diet until they underwent tumor resection(23 cases)and transarterial chemoembolization for liver metastases(1 case).For 19 patients receiving RCS throughout the day,the median FBG within one week of nutritional management was 4.30(IQR:3.30-5.70)mmol/L,which was a significant increase compared to pre-nutritional level[2.25(IQR:1.60-2.90)mmol/L;Plieved by reduction of RCS ***

关键词： corn starch hypoglycemia insulinoma nutrition therapy

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Automatic pectoral muscle boundary detection in mammograms based on Markov chain and active contour model

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Journal of Zhejiang University-Science C(Computers and Electronics) 2010年第2期11卷 111-118页

作者： Lei WANG miao-liang ZHU li-ping DENG Xin YUAN School of Computer Science and Technology Zhejiang University Hangzhou 310027 China

Automatic pectoral muscle removal on medio-lateral oblique (MLO) view of mammogram is an essential step for many mammographic processing algorithms. However,it is still a very difficult task since the sizes,the shapes and the intensity contrasts of pectoral muscles change greatly from one MLO view to another. In this paper,we propose a novel method based on a discrete time Markov chain (DTMC) and an active contour model to automatically detect the pectoral muscle boundary. DTMC is used to model two important characteristics of the pectoral muscle edge,i.e.,continuity and uncertainty. After obtaining a rough boundary,an active contour model is applied to refine the detection results. The experimental results on images from the Digital Database for Screening Mammography (DDSM) showed that our method can overcome many limitations of existing algorithms. The false positive (FP) and false negative (FN) pixel percentages are less than 5% in 77.5% mammograms. The detection precision of 91% meets the clinical requirement.

关键词： X光检查胸肌诊断方法乳房

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Plastic deformation behavior of a Cu-10Ta alloy under strong impact loading

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Defence Technology（防务技术） 2024年第2期32卷 368-382页

作者： ping Song Jianghai liu Wenbin li Yiming li Research Institute of Chemical Defense Academy of Military ScienceBeijing102205China Ministerial Key Laboratory of ZNDY Nanjing University of Science and TechnologyNanjing210094China

In this work,a Cu-10Ta alloy with a copper to tantalum mass ratio of 9:1 is prepared using powder metallurgy *** properties of the alloy,including density,microstructure,melting point,and constant-volume specific heat,are *** the split Hopkinson pressure bar(SHPB)and flyerplate impact experiments,the relationship between equivalent stress and equivalent plastic strain of the material is studied at temperatures of 298-823 K and under strain rates of 1×10^(-3)-5.2×10^(3)s^(-1),and the Hugoniot relationship at impact pressures of 1.46-17.25 GPa and impact velocities of 108-942 m/s is *** of the Cu-10Ta microstructure that occurs during high-strain-rate impact is *** indicate that the Cu-10Ta alloy possesses good thermal stability,and at ambient temperatures of up to 50%its melting point,stress softening of less than 15%of the initial strength is observed.A modified J-C constitutive model is employed to accurately predict the variation of yield strength with strain *** strong impact,the copper phase is identified as the primary source of plastic deformation in the Cu-10Ta alloy,while significant deformation of the high-strength tantalum particles is less ***,the longitudinal wave speed D is found to correlate linearly with the particle velocity u upon strong *** reveals that the sound speed and spallation strength of the alloy increase with increasing impact pressure.

关键词： Cu-10Ta SHPB Plastic deformation Flyer impact Hugoniot relationship

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Understanding Human and Machine Interaction from Decision Perspective: An Empirical Study Based on the Game of Go

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Journal of Systems Science & Complexity 2024年第2期37卷 647-667页

作者： ZHAO ping li Xuerong WANG Shouyang Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190China School of Mathematical Sciences University of Chinese Academy of SciencesBeijing 100190China

The authors aim to interpret human and AI interactions from the decision *** authors decompose the interaction analysis into the following main components in the context of interactions:Individual behavior patterns,interaction relationships,and comprehensive *** authors interpret intertemporal decisions from a physical perspective and employ cross-discipline concepts and methodologies to extract the behavior characteristics of players in the empirical case *** the individual behavior patterns,the authors find that human players prefer short-term periods to AI in *** interaction relationship analysis reveals a dynamic relationship between possible short-term co-movement and nearly counter-movement in the long *** authors apply principal component analysis to descriptive indicators and discover a regular decision *** main behavior pattern of players in the game of Go is switching between careful and daring *** differences in the decision hierarchies imply a discrepancy of patience between humans and AI.

关键词： Coherence analysis decision hierarchy machine behaviour multitaper spectral analysis

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Unraveling the Rheology of Nanocellulose Aqueous Suspensions:A Comprehensive Study on Biomass-Derived Nanofibrillated Cellulose

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Journal of Renewable Materials 2024年第3期12卷 443-455页

作者： Mingyue miao Fei Wang Qing li Longchen Tao Chenchen Dai Yu liu Shujuan Han Wenshuai Chen ping Lu Key Laboratory of Bio-Based Material Science and Technology Ministry of EducationNortheast Forestry UniversityHarbin150040China Department of Chemistry and Biochemistry Rowan UniversityGlassboroNew Jersey08028USA

The rheological properties of nanocellulose aqueous suspensions play a critical role in the development of nanocellulose-based bulk ***-crystalline,high-aspect ratio,and slender nanofibrillated cellulose(NFC)were extracted from four biomass *** cellulose nanofibrils and nanofibril bundles formed inter-connected networks in the NFC aqueous *** storage moduli of the suspensions with different concentrations were higher than their corresponding loss *** the concentration increased,the storage and loss modulus of NFC dispersion *** the shear rate increased to a certain value,there were differences in the changing trend of the rheological behavior of NFC aqueous suspensions derived from different biomass resources and the suspensions with different solid *** dispersion’s storage and loss modulus increased when the temperature rose to nearly 80℃.We hope this study can deepen the understanding of the rheological properties of NFC colloids derived from different biomass resources.

关键词： Biomass resources nanofibrillated cellulose high-pressure homogenizer suspension rheology properties

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Rainbow Pancyclicity in a Collection of Graphs Under the Dirac-type Condition

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 269-274页

作者： Lu-yi li ping li Xue-liang li Center for Combinatorics and LPMC Nankai UniversityTianjin 300071China School of Mathematics and Statistics Shaanxi Normal UniversityXi’an 710062China

Let G={Gi:i∈[n]} be a collection of not necessarily distinct n-vertex graphs with the same vertex set V,where G can be seen as an edge-colored(multi)graph and each Gi is the set of edges with color i.A graph F on V is called rainbow if any two edges of F come from different Gis’.We say that G is rainbow pancyclic if there is a rainbow cycle Cℓof lengthℓin G for each integerℓ2[3,n].In 2020,Joos and Kim proved a rainbow version of Dirac’s theorem:Ifδ(Gi)≥2/n for each i∈[n],then there is a rainbow Hamiltonian cycle in *** this paper,under the same condition,we show that G is rainbow pancyclic except that n is even and G consists of n copies of Kn/2,n/*** result supports the famous meta-conjecture posed by Bondy.

关键词： rainbow Hamiltonian cycle rainbow pancyclic meta-conjecture

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