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Journal of Mountain Science 2017年第7期14卷 1405-1418页

作者： chen bi-xia QIU Zhen-mian Faculty of Agriculture University of the RyukyusNishihara Town School of Economics Fujian Normal University Kanazawa University

Using social exchange theory, this study investigated residents＇ attitudes toward the preliminary stage of tourism development in nature reserves in Wuyishan National Nature Reserve of China, and the socio-economic and negative effects of residents＇ attitude toward the tourist industry. Results of the questionnaire survey indicated that local people perceived they could benefit from the economic activities related to tourism, and were supportive of the conservation of natural resources and local culture, sustainable community development, and community participation in ecotourism planning and management. This study also revealed that the variables of age, gender, education level, household income, family size, non-farm work arrangements, and the distance to tourism attractions, have significant association with respondents＇ attitudes toward ecotourism development, or negative impacts of the tourist industry. Respondents who are male, or have a higher household income, are more supportive of tourism development inside the reserve. Younger and more highly educated community members are more likely to support learning more about natural and cultural resources and landscapes. Respondents who have a hieher household income, or live far fromthe village center, are more concerned about the negative environmental impacts of tourism development.

关键词： Economic benefits Environmentalconservation Nature reserve Residents' attitude Tourism development Wuyishan National NatureReserve

基于PI3K/AKT通路探讨何氏补肾厚膜方改善大鼠薄型子宫内膜的作用机制

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浙江中西医结合杂志 2024年第3期34卷 214-218页

作者：徐新亚陈碧霞吴晓婷浙江中医药大学附属杭州市中医院中医妇科杭州310007

目的基于磷脂酰肌醇激酶(PI3K)/蛋白激酶B(AKT)通路探讨何氏补肾厚膜方(HBHP)改善大鼠薄型子宫内膜(TE)的作用机制。方法 48只SD雌性大鼠,按体质量随机分为对照组、模型组、阳性组和HBHP组,每组12只。除对照组外,其余各组在发情期对大... 详细信息

目的基于磷脂酰肌醇激酶(PI3K)/蛋白激酶B(AKT)通路探讨何氏补肾厚膜方(HBHP)改善大鼠薄型子宫内膜(TE)的作用机制。方法 48只SD雌性大鼠,按体质量随机分为对照组、模型组、阳性组和HBHP组,每组12只。除对照组外,其余各组在发情期对大鼠右侧子宫注入95%乙醇建立TE模型。HBHP组在模型建立后灌胃给药HBHP 10 g/(kg·d),按1 mL/100 g灌胃。阳性组给予小剂量阿司匹林肠溶片0.5 mg/(kg·d),按1 mL/100 g灌胃;对照组及模型组每日灌服生理盐水1 mL/100 g。各组大鼠连续灌胃15 d后,剖腹取子宫。苏木精-伊红(HE)染色观察子宫内膜厚度的变化。免疫组织化学染色和逆转录-定量实时聚合酶链反应(RT-qPCR)检测子宫内膜组织中PI3K、AKT蛋白和mRNA的表达。结果与对照组比较,模型组大鼠的子宫内膜厚度[(357.34±14.35)μm比(526.08±23.21)μm]、腺体数量[(8.09±1.57)比(19.08±1.31)]、子宫湿重[(0.42±0.05)g比(0.80±0.06)g]和子宫脏器指数[(0.16±0.02)%比(0.30±0.03)%]显著降低(P<0.05)。与模型组比较,HBHP组、阳性组子宫内膜厚度[(476.74±21.42)μm、(438.18±22.39)μm比(357.34±14.35)μm]、腺体数量[(16.09±1.34)、(13.91±1.45)比(8.09±1.57)]、子宫湿重[(0.75±0.06)g、(0.68±0.08)g比(0.42±0.05)g]和子宫脏器指数[(0.26±0.02)%、(0.24±0.03)%比(0.16±0.02)%]显著增加(P<0.05)。与对照组比较,模型组子宫内膜组织中PI3K、AKT及p-AKT蛋白表达[PI3K:(0.15±0.01)比(0.42±0.02);AKT:(0.21±0.01)比(0.71±0.11);p-AKT:(0.37±0.02)比(0.88±0.06)]和AKT、PI3K mRNA相对表达量[AKT:(0.42±0.20)比(1.02±0.23);PI3K:(0.58±0.22)比(1.06±0.35)]显著下调(P<0.05)。与模型组比较,HBHP组、阳性组子宫内膜组织中PI3K、AKT及p-AKT蛋白表达[PI3K:(0.33±0.03)、(0.28±0.02)比(0.15±0.01);AKT:(0.57±0.03)、(0.43±0.05)比(0.21±0.01);p-AKT:(0.71±0.04)、(0.54±0.03)比(0.37±0.02)]和AKT、PI3K mRNA相对表达量[AKT:(0.97±0.33)、(0.86±0.30)比(0.42±0.20);PI3K:(0.98±0.55)、(0.87±0.33)比(0.58±0.22)]显著上调(P<0.05)。结论 HBHP可通过增强PI3K/AKT通路来改善TE模型大鼠的子宫内膜厚度。

关键词：薄型子宫内膜大鼠磷脂酰肌醇激酶蛋白激酶B 何氏补肾厚膜方

Perfluorooctane sulfonate promotes the migration of colorectal cancer cells by inducing epithelial-mesenchymal transition

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Journal of Environmental Sciences 2024年第11期145卷 1-12页

作者： Fangfang Li Lu chen bi-xia Peng Yuyang Lei Minjie Li Liang-Hong Guo Institute of Environmental and Health Sciences China Jiliang UniversityHangzhou 310018China Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province Hangzhou 310015China College of Quality and Safety Engineering China Jiliang UniversityHangzhou 310018China College of Life Sciences China Jiliang UniversityHangzhou 310018China

The potential association between colorectal cancer(CRC)and environmental pollutants is *** studies have found that some perfluoroalkyl acids,including perfluorooctane sulfonate(PFOS),induced colorectal tumors in experimental animals and promoted the migration of and invasion by CRC cells in vitro,but the underlying mechanism is ***,we investigated the effects of PFOS on the proliferation and migration of CRC cells and the potentialmechanisms involving activating the PI3K/Akt-NF-κB signal pathway and epithelial-mesenchymal transition(EMT).It was found that PFOS promoted the growth andmigration of HCT116 cells at non-cytotoxic concentrations and increased the mRNA expression of the migration-related angiogenic cytokines vascular endothelial growth factor(VEGF)and interleukin-8(IL-8).In a mechanistic investigation,the up-stream signal pathway PI3K/Akt-NF-κB was activated by PFOS,and the process was suppressed by LY294002(PI3K/Akt inhibitor)and BAY11-7082(NF-κB inhibitor)respectively,leading to less proliferation of HCT116 ***,matrix metalloproteinases(MMP)and EMT-related markers were up-regulated after PFOS exposure,and were also suppressed respectively by LY294002 and ***,the up-regulation of EMT markers was suppressed by a MMP inhibitor *** together,our results indicated that PFOS promotes colorectal cancer cell migration and proliferation by activating the PI3K/Akt-NF-κB signal pathway and epithelial-mesenchymal *** could be a potential toxicological mechanism of PFOS-induced malignant development of colorectal cancer.

关键词： Perfluorooctane sulfonate Colorectal cancer Cell migration PI3K/Akt-NF-κB Epithelial-mesenchymal transition

Targeting RAF dimers in RAS mutant tumors:From biology to clinic

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Acta Pharmaceutica Sinica B 2024年第5期14卷 1895-1923页

作者： Huanhuan Yin Qiulin Tang Hongwei xia Feng bi Division of Abdominal Cancer Department of Medical OncologyCancer Center and Laboratory of Molecular Targeted Therapy in OncologyWest China HospitalSichuan UniversityChengdu 610041China

RAS mutations occur in approximately 30%of tumors worldwide and have a poor prognosis due to limited *** targeting of KRAS G12C has achieved significant success in recent years,but there is still a lack of efficient therapeutic approaches for tumors with non-G12C KRAS mutations.A highly promising approach is to target the MAPK pathway downstream of RAS,with a particular focus on RAF ***-generation RAF inhibitors have been authorized to treat BRAF mutant tumors for over a ***,their use in RAS-mutated tumors is not recommended due to the paradoxical ERK activation mainly caused by RAF *** address the issue of RAF dimerization,type II RAF inhibitors have emerged as leading *** clinical studies have shown the initial effectiveness of these agents against RAS mutant ***,type II RAF inhibitors in combination with MEK or ERK inhibitors have demonstrated impressive efficacy in RAS mutant *** review aims to clarify the importance of RAF dimerization in cellular signaling and resistance to treatment in tumors with RAS mutations,as well as recent progress in therapeutic approaches to address the problem of RAF dimerization in RAS mutant tumors.

关键词： RAS mutations RAF dimerization RAF inhibitors Cancer therapy Drug resistance

Two-stage Planning Method for Energy Router Considering Its Optimal Operation in Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 605-616页

作者： Meifu chen Mingchao xia Qifang chen School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China

An energy router can effectively optimize the network loss and power quality of distribution networks. The optimal configuration of the energy router is relatively complex because issues dynamically influence each other, such as the location of the energy router, optimal number and capacity of its ports, and building new distribution lines for the ports. Presently, there has been very few research studies on the practical problems for the energy router. In this paper, a planning model of an energy router combined with the distribution network is established, which fully exploits the active and reactive power control abilities of the energy router to optimize the operation of the grid. The configuration problem is decoupled into two stages. The upper layer determines the location of the energy router and the parameters of the candidate new distribution lines for the ports. The lower layer calculates the optimal configuration of the energy router by minimizing the total annual cost. Because of the same rated bus voltage in the distribution network, the existing structure of the energy router is changed to be more applicable for the distribution network, and then the power flow model of the energy router is also modified. Due to the nonlinearity of the model, the planning model is converted into a mixed-integer second-order cone model to solve efficiently. In addition, some core factors influencing the optimal scheme of the energy router are also analyzed in this paper. Simulation results show that the optimal scheme of the energy router can significantly improve the economic deployment of the energy router, and optimize the network loss and power quality of the distribution network.

关键词： Capacity allocation distribution network energy router optimal operation

Minimum mass-entransy dissipation profile for one-way isothermal diffusive mass-transfer process with mass-resistance and massleakage

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Science China(Technological Sciences) 2024年第8期67卷 2427-2435页

作者： chen LinGen xia ShaoJun Institute of Thermal Science and Power Engineering Wuhan Institute of TechnologyWuhan 430205China School of Mechanical Electrical EngineeringWuhan Institute of TechnologyWuhan 430205China School of Power Engineering Naval University of EngineeringWuhan 430033China

As a new concept,mass-entransy is one of the twins in the core of entransy *** can describe mass-transfer ability for masstransfer processes(MTPes),just as thermal-entransy for describing heat-transfer ***,mass-entransy dissipation can be utilized to evaluate the loss of mass-transfer *** mass-entransy dissipation(MMED) is utilized to optimize one-way isothermal diffusive MTPes with mass-leakage and mass-transfer law(g ∝ Δ(c),where c means concentration).For a given net amount of mass-transferred key components at the low-concentration side,optimality-condition for the MMED of isothermal diffusive MTPes is obtained by using the *** of the amount of mass-transferred and mass-leakage on optimal results are analyzed,and the obtained optimization profiles are compared with those for MTP profiles of constant-concentration-difference(c_1-c_2=const) and constant-concentration-ratio(c_1/c_2=const).The product of square of key-component-concentration(KCC) difference between high-and low-concentration sides and inert component concentration at high-concentration side for the MMED of the MTP with no mass-leakage is a constant,and the optimal relationship of the KCCs between high-and low-concentration sides with mass-leakage is significantly different from the *** mass-leakage is relatively small,the MTP with c_1-c_2=const strategy is superior to that with c_1/c_2=const strategy,and the latter is superior to the former with an increase in mass-leakage.A combination of mass-entransy concept,finite-time thermodynamics,and averaged-optimization-method is a meaningful tool for optimizing MTPes.

关键词： diffusive mass-transfer-law mass-leakage one-way isothermal mass-transfer minimum mass-entransy dissipation finite-time thermodynamics averaged-optimization-method

Planning Model for Energy Routers Considering Peer-to-Peer Energy Transactions Among Multiple Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第3期10卷 1026-1043页

作者： Meifu chen Mingchao xia Qifang chen School of Electrical Engineering Beijing Jiaotong UniversityBeijing 100044China IEEE

A high proportion of renewable energy affects the power quality of distribution networks,and surplus energy will be sold to the upstream grid at a low *** this paper,considering peer-to-peer energy transactions,the energy router-based multiple distribution networks are analyzed to solve the above problems and realize collaborative consumption of renewable ***,the investing cost of an energy router is high,and research on the economic operation of energy routers in distribution networks is ***,this paper establishes a planning model for energy routers considering peer-to-peer energy transactions among distribution networks,and explores the benefits of peer-to-peer energy transactions through energy router based multiple distribution networks.A structure of an energy router suitable for peer-to-peer energy transactions is selected,and a power flow calculation model based on a multilayer structure is *** energy router’s scheduling model is established,and unique functions of the energy router and revenue of each distribution network are considered.A power flow calculation model based on peer-to-peer interconnection of multiple distribution networks through energy routers is also ***,simulation results verify the effectiveness of the proposed planning *** show that peer-topeer energy transaction among distribution networks through energy routers can effectively reduce the comprehensive cost of distribution networks,significantly improve the power quality of the distribution networks,and reduce the impact of power fluctuation on the upstream grid incurred by the distribution network.

关键词： Capacity allocation energy router multiple distribution networks peer-to-peer energy transaction power flow optimization

“Buckets effect”in the kinetics of electrocatalytic reactions

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Journal of Energy Chemistry 2024年第2期89卷 388-396,I0010页

作者： Haowen Cui Yan-xia chen Hefei National Laboratory for Physical Sciences at Microscale Department of Chemical PhysicsUniversity of Science and Technology of ChinaHefei 230026AnhuiChina

In this study,we systematically investigated the effect of proton concentration on the kinetics of the oxygen reduction reaction(ORR)on Pt(111)in acidic *** results demonstrate a rectangular hyperbolic relationship,i.e.,the ORR current excluding the effect of other variables increases with proton concentration and then tends to a constant *** consider that this is caused by the limitation of ORR kinetics by the trace oxygen concentration in the solution,which determines the upper limit of ORR kinetics.A model of effective concentration is further proposed for rectangular hyperbolic relationships:when the reactant concentration is high enough to reach a critical saturation concentration,the effective reactant concentration will become a constant *** could be due to the limited concentration of a certain reactant for reactions involving more than one reactant or the limited number of active sites available on the *** study provides new insights into the kinetics of electrocatalytic reactions,and it is important for the proper evaluation of catalyst activity and the study of structureperformance relationships.

关键词： Oxygen reduction reaction Kinetics Zero order Rectangular hyperbolic relationship pH effect

Deciphering the linear relationship in the activity of the oxygen reduction reaction on Pt electrodes:A decisive role of adsorbates

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Journal of Energy Chemistry 2024年第7期94卷 70-77页

作者： Haowen Cui Yan-xia chen Hefei National Research Center for Physical Sciences at Microscale and Department of Chemical Physics University of Science and Technology of ChinaHefei 230026AnhuiChina

Despite substantial efforts in developing high-performance catalysts for the oxygen reduction reaction(ORR),the persistent challenge lies in the high onset overpotential of the ORR,and the effect of the elec-trolyte solution cannot be ***,we have systematically investigated the impact of adsorbate species and concentration,as well as solution pH,on the ORR activity on Pt(111)and Pt(poly)*** results all tend to establish a linear quantitative relationship between the onset potential for ORR and the adsorption equilibrium potential of the *** finding indicates the decisive role of adsorbates in the onset potential for ORR,suggesting that the adsorption potential of adsorbates can serve as an intuitive criterion for ORR *** support for this conclusion is derived from experimental results obtained from the oxygen evolution reaction on Pt(poly)with different adsorbate species and from the hydrogen evolution reaction on Pt(111)with iodine *** further propose both an empirical equation for the onset potential for ORR and the concept of a potential-regulated adsor-bate shielding effect to elucidate the influence of adsorbates on ORR *** study provides new insights into the high onset overpotential of the ORR and offers potential strategies for predicting and enhancingORRactivity inthefuture.

关键词： Oxygen reduction reaction Activity Adsorbate Equilibrium potential Pt(111)

Light-based 3D printing of stimulus-responsive hydrogels forminiature devices:recent progress and perspective

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bio-Design and Manufacturing 2024年第5期7卷 721-746页

作者： chen Xin Neng xia Li Zhang Department of Mechanical and Automation Engineering The Chinese University of Hong KongHong Kong 999077China Multi-Scale Medical Robotics Center Hong Kong Science ParkShatin NTHong Kong 999077China Chow Yuk Ho Technology Center for Innovative Medicine The Chinese University of Hong KongHong Kong 999077China Department of Surgery The Chinese University of Hong KongHong Kong 999077China CUHK T Stone Robotics Institute The Chinese University of Hong KongHong Kong 999077China

Miniature devices comprising stimulus-responsive hydrogels with high environmental adaptability are now considered competitive candidates in the fields of biomedicine,precise sensors,and tunable *** and advanced fabricationmethods are critical formaximizing the application capabilities ofminiature ***-based three-dimensional(3D)printing technology offers the advantages of a wide range of applicable materials,high processing accuracy,and strong 3D fabrication capability,which is suitable for the development of miniature devices with various *** paper summarizes and highlights the recent advances in light-based 3D-printed miniaturized devices,with a focus on the latest breakthroughs in lightbased fabrication technologies,smart stimulus-responsive hydrogels,and tunable miniature devices for the fields of miniature cargo manipulation,targeted drug and cell delivery,active scaffolds,environmental sensing,and optical ***,the challenges in the transition of tunable miniaturized devices from the laboratory to practical engineering applications are *** opportunities that will promote the development of tunable microdevices are elaborated,contributing to their improved understanding of these miniature devices and further realizing their practical applications in various fields.

关键词： 3D printing Stimulus-responsive hydrogels Miniature devices Shape-morphing