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Friction reactions induced by selective hydrogenation of textured surface under lubricant conditions

Friction 2024年第1期12卷 174-184页

作者： Naizhou DU Xubing wei Xiaowei lI Zan CheN Shiqi lu jiaqing diNG Cunao feng Kai CheN jianghao QIAO Dekun ZHANG Kwang-Ryeol lEE Tiancai ZHANG School of Materials Science and Physics China University of Mining and TechnologyXuzhou 221116China Key laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials and Protective TechnologiesNingbo Institute of Materials Technology&EngineeringChinese Academy of SciencesNingbo 315201China Computational Science Center Korea Institute of Science and TechnologySeoul 136-791Republic of Korea Technology Development department Shipbuilding Technology Research InstituteShanghai 200032China

The passivation of hydrogen atoms and the conformation of textured surfaces under oil-lubricated conditions are effective strategies to obtain amorphous carbon(a-C)films with extremely low *** is critical to understanding the influence mechanism of selective surface hydrogenation on the tribological behaviors of textured a-C film under oil-lubricated *** particular,the interactions of hydrogen atoms and lubricants are confusing,which is enslaved to the in situ characterization *** reactive molecular dynamics(RMD)simulations were conducted to analyze the friction response of textured a-C films with selective hydrogenation surfaces under oil-lubricated *** results indicate that the existence of hydrogen atoms on specific bump sites significantly decreases the friction coefficient(μ)of textured a-C film,which is highly dependent on the surface hydrogen *** repulsion between hydrogen atoms and lubricant molecules prompts the formation of a dense lubricant film on the surface of the mating ***,with the enhancement of the surface hydrogen content,the passivation of the friction interface and the repulsion between hydrogen atoms and lubricants play dominant roles in reducing the friction coefficient instead of hydrodynamic lubrication.

关键词： textured amorphous carbon(a-C) selective hydrogenation oil lubrication friction mechanism reactive molecular dynamics(RMD)

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Influence of dietary conjugated linoleic acid on growth, fatty acid composition and hepatic lipogenesis in large yellow croaker (Pseudosciaena crocea R.)

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Journal of zhejiang university-Science B(Biomedicine & Biotechnology) 2008年第9期9卷 691-700页

作者： Zhan-yu ZHAO1,2, Tian-xing WU1, Hong-gang TANG1, ji-ze ZHANG3 (1department of Chemistry, zhejiang university, hangzhou 31002., china) (2Key laboratory for Molecular Design and Nutrition Engineering, Ningbo Institute of Technology, zhejiang university, Ningbo 315100, china) (3School of Animal Sciences, zhejiang university, hangzhou 31002., china) department of Chemistry Zhejiang University Hangzhou 310027 China Key laboratory for Molecular Design and Nutrition Engineering Ningbo Institute of Technology Zhejiang University Ningbo 315100 China zhanyuzhao@***.

We examined the effects of conjugated linoleic acid (ClA) on growth, fatty acid composition and enzyme activity of fatty acid oxidation in the liver of large yellow croaker. We divided 1600 fish (average initial weight 150 g) into 4 groups and reared them in 8 cages. Four dietary treatments were formulated to contain 0%, 1%, 2% and 4% (w/w) ClA, respectively. The fish were fed for 10 weeks ad libitum twice daily. We found that the dietary ClA had no effect on growth, biometric parameters and whole body proximate (P>0.05), but showed some significant effects on the fatty acid composition in both muscle and the liver. The activities of lipogenic enzymes were slightly depressed in fish fed with increasing levels of ClA when compared with control (P>0.05). dietary ClA supplementation had no effects on liver lipid content, but significantly increased the contents of saturated fatty acids (SFA) and polyunsaturated fatty acids (PUFA) (Ple and the liver. dietary ClA inclusion resulted in significant increases of the biologically active cis-9, trans-11 and trans-10, cis-12 isomers in both tissues (Phe total accumulation of ClA was higher in the liver (3.83%, w/w) than in muscle (3.77%, w/w) when fed with 4% (w/w) ClA. This study demonstrates that large yellow croakers are capable of absorbing and depositing ClA and long-chain n-3 PUFA in the liver and muscle, showing that this species fed with ClA could be an important human food source for these healthful fatty acids.

关键词： Conjugated linoleic acid (ClA) Fatty acids lipid lipogenic enzymes large yellow croaker

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Cytokines-activated nuclear IKKα-FAT10 pathway induces breast cancer tamoxifen-resistance

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Science china(life Sciences) 2024年第7期67卷 1413-1426页

作者： Xueyan Chen weilin Wu ji-Hak Jeong Matjaz Rokavec Rui wei Shaolong feng Werner Schroth Hiltrud Brauch Shangwei Zhong Jun-li luo department of Oncology Xiangya HospitalCentral South UniversityChangsha 410008China department of Molecular Medicine The Scripps Research InstituteJupiter 33458USA Dr.Margarete Fischer-Bosch-Institute of Clinical Pharmacology Stuttgart 70376Germany iFIT Cluster of Excellence University of TübingenTübingen 72074Germany The Cancer Research Institute and the Second Affiliated Hospital Henyang Medical SchoolUniversity of South ChinaHengyang 421001China National health Commission Key laboratory of Birth Defect Research and Prevention Hunan Provincial Maternal and Child Health Care HospitalChangsha 410008China

Endocrine therapy that blocks estrogen signaling is the most effective treatment for patients with estrogen receptor positive(ER+)breast ***,the efficacy of agents such as tamoxifen(Tam)is often compromised by the development of *** we report that cytokines-activated nuclear IKKαconfers Tam resistance to ER+breast cancer by inducing the expression of FAT10,and that the expression of FAT10 and nuclear IKKαin primary ER+human breast cancer was correlated with lymphotoxinβ(lTB)expression and significantly associated with relapse and metastasis in patients treated with adjuvant ***αactivation or enforced FAT10 expression promotes Tam-resistance while loss of IKKαor FAT10 augments Tam *** induction of FAT10 by IKKαis mediated by the transcription factor Pax5,and coordinated via an IKKα-p53-miR-23a circuit in which activation of IKKαattenuates p53-directed repression of ***,our findings establish IKKα-to-FAT10 pathway as a new therapeutic target for the treatment of Tam-resistant ER+breast cancer.

关键词： nuclear IKKα breast cancer Tam-resistance FAT10 Pax5 lymphotoxin nuclear IKKα-FAT0 pathway

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COMPUTING EIGENVECTORS OF NORMAl MATRICES WITH SIMPlE INVERSE ITERATION

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Journal of Computational mathematics 2003年第5期21卷 657-670页

作者： Zhen-yue Zhang Tiang-wei Ouyang (department of mathematics, zhejiang university, Yuquan Campus, hangzhou 31002., china) department of mathematics Zhejiang University Yuquan Campus Hangzhou 310027

It is well-known that if we have an approximate eigenvalue A of a normal matrix A of order n, a good approximation to the corresponding eigenvector u can be computed by one inverse iteration provided the position, say kmax, of the largest component of u is known. In this paper we give a detailed theoretical analysis to show relations between the eigenvector u and vector Xk, k = 1, … ,n, obtained by simple inverse iteration, i.e., the solution to the system (A - I)x = ek with ek the kth column of the identity matrix I. We prove that under some weak conditions, the index kmax is of some optimal properties related to the smallest residual and smallest approximation error to u in spectral norm and Probenius norm. We also prove that the normalized absolute vector v = |u|/||u|| of u can be approximated by the normalized vector of (||x1||2, … ||xn||2)T- We also give some upper bounds of |u(k)| for those 'optimal' indexes such as Fernando's heuristic for kmax without any assumptions. A stable double orthogonal factorization method and a simpler but may less stable approach are proposed for locating the largest component of u.

关键词： Eigenvector Inverse iteration Accuracy Error estimation.

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Polygonatum sibiricum polysaccharides attenuated colitis via regulating gut microbiota mediated colonic NlRP3/ASC/Caspase-1/GSDMD signaling pathway

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Food Science and Human Wellness 2024年

作者： Zhong-Yu Yuan Xin-Yu Wang Jun Wang Yuan Xu jing Chen Shu-Qi Yu Zhi-ming Chen Pei-lu Chen ji-Xiao Zhu wei-feng Huang Guang-Hui Xu li-Tao Yi department of Chemical and Pharmaceutical Engineering， College of Chemical Engineering， Huaqiao university Xiamen Medicine Research Institute Research Center of Traditional Chinese Medicine Resources and Ethnic Medicine， jiangxi university of Chinese Medicine department of Gastroenterology and hepatology， The First Affiliated Hospital of Xiamen university， Xiamen university Institute of Pharmaceutical Engineering， Huaqiao university Fujian Provincial Key laboratory of Biochemical Technology， Huaqiao university

Polygonatum sibiricum has long been a popular functional food in Asia， known for its anti-inflammatory properties. However， its efficacy in alleviating colitis has yet to be investigated. This study aimed to explore the therapeutic potential of Polygonatum sibiricum polysaccharides (PSP) in dextran sulfate sodium (DSS)-induced colitis， focusing on the related pyroptosis mechanisms. Scanning electron microscopy (SEM) analysis showed that PSP possesses a smooth surface with no pore structure and a dense， lamellar structure adorned with numerous spherical entities. PSP treatment significantly reduced colitis symptoms and decreased pro-inflammatory cytokines， likely through suppression of the TlR4/NF-κB signaling pathway. Additionally， PSP attenuated NlRP3/ASC/Caspase-1/GSDMD-mediated pyroptosis and mitochondria damage in the colon， while enhanced the expression of tight junction and adherens junction proteins. Microbiota sequencing showed that PSP increased the abundance of phylum Bacteroidota and genus such as Muribaculaceae， lactobacillus， Clostridia， and lachnospiraceae， while decreased the phylum Proteobacteria and the genus Enterobacter， Escherichia-Shigella， and Blautia. In conclusion， this study demonstrates that PSP exerts the potential therapeutic role against colitis， which was mediated by the regulation of gut microbiota and the inhibition of colonic NlRP3/ASC/Caspase-1/GSDMD signaling pathway.

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Insights into photocatalytic mechanism over a novel Cu_(2)WS_(4)/MoS_(2) S-scheme heterojunction

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Rare Metals 2024年第7期43卷 3118-3133页

作者： wei Zhao ji-Hui Cao Jun-jie liao Yun liu Xiao-Jun Zeng Jun-Yu Shen Xue-Kun Hong Yang Guo he-Hua Zeng Ya-Zi liu School of Materials Engineering Jiangsu Key Laboratory of Advanced Functional MaterialsSchool of Electronic and Information EngineeringChangshu Institute of TechnologyChangshu215500China School of Chemistry and Chemical Engineering Changji UniversityChangji 831100China State Environmental Protection Key laboratory of Soil Environmental Management and Pollution Control Ministry of Ecology and EnvironmentNanjing Institute of Environmental SciencesNanjing 210023China School of Environment Jiangsu Engineering Lab of Water and Soil Eco-RemediationNanjing Normal UniversityNanjing 210023China department of Chemical Engineering Curtin UniversityPerthWA6845Australia

A novel efficient Cu_(2)WS_(4)/MoS_(2) step-scheme(S-scheme)heterojunction photocatalyst was constructed for the first time and applied in the removal of environmental *** the as-prepared photocatalysts,the Cu_(2)WS_(4)/MoS_(2)-8%heterojunc tion photoc atalyst demonstrates the optimal photocatalytic performance,with the catalytic oxidation efficiency of tetracycline(TC)and the catalytic reduction efficiency of Cr^(6+)reaching 93.3%and 82.1%,*** excellent catalytic properties of Cu_(2)WS_(4)/MoS_(2) heterojunction photocatalysts are attributed to the effective separation pathways of charges and the presence of S-scheme heterojunctions,together with stronger redox *** is speculated that the photogenerated carrier migration path of the Cu_(2)WS_(4)/MoS_(2) catalyst follows the typical S-scheme photocatalytic mechanism,which is verified by the in-depth experimental study and simulated calculations including the electron paramagnetic resonance(EPR)analysis,free radical quenching experiments,charge density distribution,and simulated built-in electric field formation at the interface,which acts as driving force to promote the separation of photoinduced electrons and ***,the photocatalytic mechanism of S-scheme photogenerated carrier migration for the Cu_(2)WS_(4)/MoS_(2) catalyst is revealed based on the systematic experimental techniques and simulated calculations,accounting for its superior photocatalytic oxidation and reduction *** study provides inspiring implications to develop high-efficient S-scheme photocatalytic systems for versatile applications in solarenergy conversion.

关键词： Cu_(2)WS_(4)/MoS_(2) S-scheme heterojunction Photocatalysis

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New interaction solutions of the(2+1)-dimensional Nizhnik–Novikov–Veselov-type system and fusion phenomena

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Communications in Theoretical Physics 2024年第10期76卷 9-13页

作者： Guo-Hua Wang ji lin Shou-feng Shen School of Information Engineering Taizhou Vocational College of Science & Technology department of Physics Zhejiang Normal University department of Applied mathematics Zhejiang University of Technology

By means of the multilinear variable separation（MlVS） approach, new interaction solutions with low-dimensional arbitrary functions of the（2+1）-dimensional Nizhnik–Novikov–Veselovtype system are constructed. Four-dromion structure, ring-parabolic soliton structure and corresponding fusion phenomena for the physical quantity U =λ（lnf）xyare revealed for the first time. This MlVS approach can also be used to deal with the（2+1）-dimensional Sasa–Satsuma system.

关键词： fusion interaction solution multilinear variable separation NNV-type system

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Chinese version of the Perth Alexithymia Questionnaire:psychometric properties and clinical applications

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General Psychiatry 2024年第2期37卷 274-283页

作者： Xin-lu Cai Qingying Ye Ke Ni lin Zhu Qian Zhang Minmin Yin Zhe Zhang wei wei David A.Preece Bao-ming li Institute of Brain Science and department of Physiology School of Basic Medical SciencesHangzhou Normal UniversityHangzhouZhejiangChina zhejiang Philosophy and Social Science laboratory for Research in Early Development and Childcare Hangzhou Normal UniversityHangzhouZhejiangChina Qiqihar Mental health Center QiqiharChina department of Special Education Faculty of EducationHangzhou Normal UniversityHangzhouZhejiangChina department of Neurobiology Affiliated Mental Health Center&Hangzhou Seventh People's Hospital Zhejiang University School of MedicineHangzhouZhejiangChina liangzhu laboratory MOE Frontier Science Center for Brain Science and Brain-machine IntegrationState Key Laboratory of Brain-machine IntelligenceZhejiang UniversityHangzhouZhejiangChina NHC and CAMS Key laboratory of Medical Neurobiology Zhejiang UniversityHangzhouChina School of Population health and Curtin enAble Institute Curtin UniversityPerthWestern AustraliaAustralia School of Psychological ScienceThe University of Western AustraliaPerthWestern AustraliaAustralia

Background The alexithymia trait is of high clinical *** Perth Alexithymia Questionnaire(PAQ)was recently developed to enable detailed facet-level and valence-specific assessments of *** In this paper,we introduce the first Chinese version of the PAQ and examine its psychometric properties and clinical *** In Study 1,the PAQ was administered to 990 Chinese *** examined its factor structure,internal consistency,test-retest reliability,as well as convergent,concurrent and discriminant *** Study 2,four groups,including a major depressive disorder(MDD)group(n=50),a matched healthy control group for MDD(n=50),a subclinical depression group(n=50)and a matched healthy control group for subclinical depression(n=50),were *** comparisons were conducted to assess the clinical relevance of the *** In Study 1,the intended five-factor structure of the PAQ was found to fit the data *** PAQ showed good internal consistency and test-retest reliability,as well as good convergent,concurrent and discriminant *** Study 2,the PAQ was able to successfully distinguish the MDD group and the subclinical depression group from their matched healthy *** The Chinese version of the PAQ is a valid and reliable instrument for comprehensively assessing alexithymia in the general population and adults with clinical/subclinical depression.

关键词： clinical instrument matched

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NUMERICAl SIMUlATION OF CAVITATION FlOW UNDER HIGH PRESSURE AND TEMPERATURE

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Journal of Hydrodynamics 2011年第3期23卷 289-294页

作者： ZHAO wei-guo ZHANG ling-xin SHAO Xue-ming department of Mechanics Zhejiang University Hangzhou 310027 China State Key laboratory of Fluid Power Transmission and Control Zhejiang University Hangzhou 310027 China

The numerical simulation of cavitation flow on a 2D NACA0015 hydrofoil under high pressure and temperature is performed. The Singhal＇s cavitation model is adopted combined with an improved RNG k-ε turbulence model to study the cavitation flow. The thermal effect in the cavitation flow is taken into account by introducing the energy equation with a source term based on the latent heat transfer. The code is validated by a case of a hydrofoil under two different temperatures in a comparison between the simulation and the experiment. Computational results show that the latent heat of vaporization has a significant impact on the cavitation process in the high temperature state, and the cavity in the high temperature state is thinner and shorter than that in a normal state with the same cavitation number, due to the fact that the heat absorption in the cavitation area reduces the local temperature and the saturated vapor pressure. This numerical study provides some guidance for the design of machineries in the High Pressure and Temperature （HPT） state.

关键词： cavitation NACA0015 thermodynamic CFD high pressure and temperature

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Chiral quantum heating and cooling with an optically controlled ion

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light(Science & Applications) 2024年第7期13卷 1393-1400页

作者： jin-Tao Bu jian-Qi Zhang Ge-Yi ding jia-Chong li jia-wei Zhang Bin Wang Wen-Qiang ding Wen-Fei Yuan liang Chen Qi Zhong Ali Keçebaş Şahin KÖzdemir Fei Zhou Hui jing Mang feng State Key laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsInnovation Academy of Precision Measurement Science and TechnologyChinese Academy of Sciences430071 WuhanChina. university of the Chinese Academy of Sciences 100049 BeijingChina. Research Center for Quantum Precision Measurement Guangzhou Institute of Industry Technology511458 GuangzhouChina. department of Engineering Science and Mechanics and Materials Research InstitutePennsylvania State UniversityUniversity ParkState CollegePA 16802USA. Key laboratory of low-dimensional Quantum Structures and Quantum Control of Ministry of Education Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal University410081 ChangshaChina. department of Physics Zhejiang Normal University321004 JinhuaChina

Quantum heat engines and refrigerators are open quantum systems,whose dynamics can be well understood using a non-hermitian formalism.A prominent feature of non-hermiticity is the existence of exceptional points(EPs),which has no counterpart in closed quantum *** has been shown in classical systems that dynamical encirclement in the vicinity of an EP,whether the loop includes the EP or not,could lead to chiral mode ***,we show that this is valid also for quantum systems when dynamical encircling is performed in the vicinity of their liouvillian EPs(lEPs),which include the effects of quantum jumps and associated noise—an important quantum feature not present in previous *** demonstrate,using a Paul-trapped ultracold ion,the first chiral quantum heating and refrigeration by dynamically encircling a closed loop in the vicinity of an *** witness the cycling direction to be associated with the chirality and heat release(absorption)of the quantum heat engine(quantum refrigerator).Our experiments have revealed that not only the adiabaticity breakdown but also the landau–Zener–Stückelberg process play an essential role during dynamic encircling,resulting in chiral thermodynamic *** observations contribute to further understanding of chiral and topological features in non-hermitian systems and pave a way to exploring the relation between chirality and quantum thermodynamics.

关键词： quantum chiral dynamical

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