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Synthesis of A New Group of Flavones Containing Crown Ether Moiety

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Chemical research in Chinese Universities 1995年第2期11卷 170-173页

作者： LI Ting-sheng,ZHU Chuan-fang and LI Zhong-hua Wept,of Chem.,Central china normal university,Wuhan,430070)WEI xu-dong and HU Hong-wen (department oj Chemistry,nanjing university,nanjing.210093) CENT china normal UNIV DEPT CHEMWUHAN 430070PEOPLES R CHINA nanjing UNIV DEPT CHEMNANJING 210093PEOPLES R CHINA

Flavones are main components of natural occurring flavonoils. It is well documented in the literatures that flavones are known to exhibit a wide variety of biological and pharmaceutical activities. Many of them have been used therapentically for the treatments of symptoms of chronic venous insufficiency, of varicose veins, of conditions and of diabetic retinopathy, etc.. Some flavones have

关键词： Flavone Crown ether Synthesis

THE MINIMAL CLOSED NON-TrIVIAL IDEALS OF TOEpLITZ ALGEBrAS ON DISCrETE GrOUpS

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Chinese Annals of mathematics,Series B 2000年第3期21卷 367-374页

作者： xu QINGXIANG(department of mathematics, Shanghai normal university, Shanghai 200234, china.) E-mail:qxxu@*** department of mathematics Shanghai Normal University Shanghai 200234 China

Let G be a discrete group and (G, G+) an ordered group. Let (G, GF) be the minimal quasiordered group containing (G, G+). Let G+ (G) and (G) be the corresponding Toeplitz algebras, and γGF,G+ the natural C*-algebra morphism from G+ (G) to GF(G). This paper studies the connection between Ker GF,G+ and the minimal closed ideal ofTG+ (G). It is proved that if G is amenable and GF≠G+, then Ker γGF,G+ is exactly the minimal closed non-trivial ideal of G+ (G). As an application, in the last part of this paper, a character of K-groups of Toeplitz algebras on ordered groups is clarified.

关键词： Discrete group Toeplitz algebra Minimal ideal

Smoothness for the collision local times of bifractional Brownian motions

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Science china mathematics 2011年第9期54卷 1859-1873页

作者： SHEN GuangJun 1,2,& yan LiTan 3 1 department of mathematics,East china university of Science and Technology,Shanghai 200237,china 2 department of mathematics,Anhui normal university,Wuhu 241000,china 3 department of mathematics,Donghua university,Shanghai 201620,china department of mathematics East China University of Science and Technology Shanghai China department of mathematics Anhui Normal University Wuhu China department of mathematics Donghua University Shanghai China

Let B^Hi,Ki ={ Bt^Hi,Ki, t ≥ 0}, i= 1, 2 be two independent bifractional Brownian motions with respective indices Hi ∈ （0, 1） and K∈ E （0, 1]. One of the main motivations of this paper is to investigate f0^Tδ（Bs^H1 ,K1 - the smoothness of the collision local time, introduced by Jiang and Wang in 2009, IT = f0^T δ（Bs^H1,K1）ds, T 〉 0, where 6 denotes the Dirac delta function. By an elementary method, we show that iT is smooth in the sense of the Meyer-Watanabe if and only if min{H-1K1, H2K2} 〈-1/3.

关键词： bifractional Brownian motion collision local time intersection local time chaos expansion

The principle and amelioration of lithium plating in fast-charging lithium-ion batteries

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Journal of Energy Chemistry 2024年第10期97卷 453-459,I0009页

作者： Yi yang Xia-Lin Zhong Lei xu Zhuo-Lin yang Chong yan Jia-Qi Huang School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Advanced research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Green Chemical reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China yangtze river Delta Graduate School of Beijing Institute of Technology Jiaxing 314003ZhejiangChina

Fast charging is restricted primarily by the risk of lithium(Li)plating,a side reaction that can lead to the rapid capacity decay and dendrite-induced thermal runaway of lithium-ion batteries(LIBs).Investigation on the intrinsic mechanism and the position of Li plating is crucial to improving the fast rechargeability and safety of ***,we investigate the Li plating behavior in porous electrodes under the restricted transport of Li^(+).Based on the theoretical model,it can be concluded that the Li plating on the anodeseparator interface(ASI)is thermodynamically feasible and kinetically ***,the prior deposition of metal Li on the ASI rather than the anode-current collector interface(ACI)is verified *** order to facilitate the transfer of Li^(+)among the electrode and improve the utilization of active materials without Li plating,a bilayer asymmetric anode composed of graphite and hard carbon(GH)is *** and simulation results suggest that the GH hybrid electrode homogenizes the lithiated-rate throughout the electrode and outperforms the pure graphite electrode in terms of the rate performance and inhibition of Li *** work provides new insights into the behavior of Li plating and the rational design of electrode structure.

关键词： Graphite Hard carbon Fast charging Lithium plating Lithium-ion batteries

On semisymmetric cubic graphs of order 6p^(2)

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Science china mathematics 2004年第1期47卷 1-17页

作者： LU Zaiping, WANG Changqun & xu MingyaoLMAM, School of Mathematical Sciences, peking university, Beijing 100871, china department of mathematics, Zhengzhou university, Zhengzhou 450052, chinapresent address: department of mathematics, Qufu normal university, Qufu 273165, china. LMAM School of Mathematical Sciences Peking University Beijing China department of mathematics Zhengzhou University Zhengzhou China

A graph Γ is said to be G-semisymmetric if it is regular and there exists a subgroup G of A := Aut(Γ) acting transitively on its edge set but not on its vertex set. In the case of G = A, we call Γ a semisymmetric graph. The aim of this paper is to investigate (G-)semisymmetric graphs of prime degree. We give a group-theoretical construction of such graphs, and give a classification of semisymmetric cubic graphs of order 6p2 for an odd prime p.

关键词： (G-)semisymmetric graph, symmetric graph, bi-Cayley graph, regular covering, group action.

Constructing multifunctional deep-blue emitters with weak charge transfer excited state for high-performance non-doped blue OLEDs and single-emissive-layer hybrid white OLEDs

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Chinese Chemical Letters 2024年第10期35卷 175-179页

作者： Hui Liu Xiangyang Tang Zhuang Cheng Yin Hu yan yan yangze xu Zihan Su Futong Liu ping Lu State Key Laboratory of Supramolecular Structure and Materials department of Chemistry Jilin UniversityChangchun 130012China Sichuan province Key Laboratory of Information Materials and Devices Application College of Optoelectronic EngineeringChengdu University of Information TechnologyChengdu 610225China

Deep-blue emitter with high photoluminescence efficiency(pLQY)is highly desirable in ultra-high definition displays and white solid-state *** this work,two deep-blue phenanthro[9,10]imidazole derivatives,ppIS and pppIS,with hot exciton property are successfully *** to ppIS,the embedded phenyl bridge in pppIS is able to effectively increase the overlap of frontier molecular *** consequence,pppIS shows higher oscillator strength and significantly enhanced *** also achieves better electroluminescence performance in non-doped device,showing deep-blue emission with Commission International de l’Eclairage(CIE)coordinates of(0.153,0.087)and the maximum external quantum efficiency(EQEmax)of 8.5%with minuscule efficiency ***,when pppIS serves as the host for phosphor pO-01,high-efficiency orange phosphorescent device is obtained with high EQEmax of 29.8%and negligible efficiency roll-off at 1000 cd/m^(2).Further,efficient single-emissive-layer white device is assembled via utilizing pppIS as a blue emitter as well as the host for pO-01 simultaneously,providing warm-white emission with CIE coordinates of(0.429,0.433)at 1000 cd/m^(2),the forward-viewing EQEmaxof 27.2%and maximum power efficiency(pEmax)of 80.1 lm/W,*** studies can establish a viable design strategy for deep-blue emitters in high-performance non-doped blue OLEDs and hybrid WOLEDs.

关键词： Deep-blue emitters phenanthroimidazole Hot exciton Host Single-emissive-layer white device

Epigenetic modifications of placenta in women with gestational diabetes mellitus and their offspring

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World Journal of Diabetes 2024年第3期15卷 378-391页

作者： yan Yi Tao Wang Wei xu San-Hong Zhang department of Ultrasonography The First Affiliated Hospital of Yangtze UniversityJingzhou 434000Hubei ProvinceChina Clinical Molecular Immunology Center Yangtze UniversityJingzhou 434023Hubei ProvinceChina department of pediatric Xiantao First People’s HospitalXiantao 433000Hubei ProvinceChina

Gestational diabetes mellitus(GDM)is a pregnancy-related complication characterized by abnormal glucose metabolism in pregnant women and has an important impact on fetal *** a bridge between the mother and the fetus,the placenta has nutrient transport functions,endocrine functions,etc.,and can regulate placental nutrient transport and fetal growth and development according to maternal metabolic *** by means of placental transmission can changes in maternal hyperglycemia affect the *** are many reports on the placental pathophysiological changes associated with GDM,the impacts of GDM on the growth and development of offspring,and the prevalence of GDM in offspring after *** epigenetic changes in GDM are involved in the programming of fetal development and are involved in the pathogenesis of later chronic *** paper summarizes the effects of changes in placental nutrient transport function and hormone secretion levels due to maternal hyperglycemia and hyperinsulinemia on the development of offspring as well as the participation of changes in placental epigenetic modifications due to maternal hyperglycemia in intrauterine fetal programming to promote a comprehensive understanding of the impacts of placental epigenetic modifications on the development of offspring from patients with GDM.

关键词： Gestational diabetes mellitus placental functions Epigenetics Offspring development

The Changes of Histone Methylation Induced by Adolescent Social Stress regulate the resting-State Activity in mpFC

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research 2024年第3期2023卷 273-283页

作者： Jiesi Wang Wei Zhang Hang xu Bart Ellenbroek Jiajie Dai Li Wang Chaogan yan Weiwen Wang CAS Key Laboratory of Mental Health Institute of PsychologyChinese Academy of SciencesBeijing.China department of psychology University of Chinese Academy of SciencesBeijingChina School of psychology Victoria University of WellingtonKelburnWellington 6012New Zealand CAS Key Laboratory of Behavioral Science Institute of PsychologyChinese Academy of SciencesBeijingChina.

Early-life stress can lead to sustained alterations in regional resting-state brain functions, but the underlying molecular mechanism remains unclear. Stress can also induce sustained changes in epigenetic modifications across brain regions, which are not limited to a few genes;rather, they often tend to produce global levels of change. The functional implication of these changes also remains to be elucidated. We hypothesize that global epigenetic changes may partly modulate the resting-state functions of brain regions to influence behavior. To test this hypothesis, we used an adolescent social stress (ASS) model in mice and examined the relationship between epigenetic modifications and regional resting-state brain activity using resting-state functional magnetic resonance imaging (rs-fMrI). The results showed that, compared to the control mice, the stressed mice showed increased anxiety and social avoidance behaviors and greater levels of dimethylation of histone H3 at lysine 9 (H3K9me2) in the medial prefrontal cortex (mpFC). In addition, the resting-state activity represented by the amplitude of low-frequency fluctuation (ALFF) was significantly lower in the mpFC of stressed mice. To verify the relationship of H3K9me2 and ALFF, the specific inhibition of H3Kme2 was performed by using the drug UNC0642, which reversed the anxiety behavior induced by ASS and significantly increase the ALFF value of mpFC in both normal and ASS animals. Our study is the first to report an association between histone modifications and rs-fMrI findings, providing a new perspective for understanding of the significance of regional brain epigenetic changes and a possible molecular explanation for rs-fMrI findings.

关键词： sustained mpFC alterations

The Caching and pricing Strategy for Information-Centric Networking with Advertisers’participation

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china Communications 2024年第3期21卷 283-295页

作者： Zheng Quan yan Wenliang Wu rong Tan Xiaobin yang Jian Yuan Liu xu Zhenghuan Laboratory for Future Networks Department of AutomationUniversity of Science and Technology of ChinaHefei 230026China Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefei 230088China Institute of Advanced Technology University of Science and Technology of ChinaHefei 230088China Suzhou Nuclear power research Institute Suzhou 215004China National Engineering Laboratory for public Safety risk perception and Control by Big Data(NEL-pSrpC) China Academy of Electronics and Information Technology of CETCBeijing 100041China

As users’access to the network has evolved into the acquisition of mass contents instead of Ip addresses,the Ip network architecture based on end-to-end communication cannot meet users’***,the Information-Centric Networking(ICN)came into *** a technical point of view,ICN is a promising future network *** and customizing a reasonable pricing mechanism plays a positive role in promoting the deployment of *** current research on ICN pricing mechanism is focused on paid ***,we study an ICN pricing model for free content,which uses game theory based on Nash equilibrium to *** this work,advertisers are considered,and an advertiser model is established to describe the economic interaction between advertisers and ICN *** solution can formulate the best pricing strategy for all ICN entities and maximize the benefits of each *** extensive analysis and numerical results show that the proposed pricing framework is significantly better than existing solutions when it comes to free content.

关键词： advertisers cache free content Information-Centric Networking pricing strategy