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Distribution and bioavailability of mercury in size-fractioned atmospheric particles around an ultra-low emission power plant in Southwest China

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Journal of Environmental Sciences 2024年第4期138卷 141-152页

作者： Wei Zhang Jinjuan Li Hao Qiu Xingqiang guo Zhijun Fei Yi Xing deliang Yin College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China College of Resources and Environmental Engineering Guizhou Institute of TechnologyGuiyang 550003China Key Laboratory of Karst Georesources and Environment(Guizhou University) Ministry of EducationGuiyang 550025China School of Energy and Environmental Engineering University of Science&Technology BeijingBeijing 100083China

Ultra-low emission(ULE)technology retrofits significantly impact the particulate-bound mercury(Hg)emissions from coal-fired power plants(CFPPs);however,the distribution and bioavailability of Hg in size-fractioned particulate matter(PM)around the ULE-retrofitted CF-PPs are less ***,total Hg and its chemical speciation in TSP(total suspended particles),PM_(10)(aerodynamic particle diameter≤10μm)and PM_(2.5)(aerodynamic particle diameter≤2.5μm)around a ULE-retrofitted CFPP in Guizhou Province were *** PM_(2.5)concentration was higher around this ULE-retrofitted CFPP than that in the intra-regional urban cities,and it had higher mass Hg concentration than other sizefractioned *** Hg concentrations in PM had multifarious sources including CFPP,vehicle exhaust and biomass combustion,while they were significantly higher in autumn and winter than those in other seasons(P40%).Mass concentrations of exchangeable,HCl-soluble,elemental,and residual Hg in PM_(2.5)were higher than those in other size-fractioned PM,and were markedly elevated in autumn and winter(P<0.05).In PM_(2.5),HCl-soluble Hg presented a significantly positive relationship with elemental Hg(P<0.05),while residual Hg showed the significantly positive relationships with HCl-soluble Hg and elemental Hg(P<0.01).Overall,these results suggested that atmospheric PM-bound Hg around the ULE-retrofitted CFPP tends to accumulate in finer PM,and has higher bioavailable fractions,while has potential transformation between chemical speciation.

关键词： Size-fractioned particles Mercury Chemical speciation Coal-fired power plant Ultra-low emission

A novel microRNA miR-MTCO3P38 inhibits malignant progression via STAT3/PTTG1/MYC in hepatocellular carcinoma

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Genes & Diseases 2022年第4期9卷 845-848页

作者： deliang guo Yang Gu Dong Ma Pengpeng Liu Baiyang Chen Zhisu Liu Ping Wu Quanyan Liu Department of Hepatobiliary and Pancreatic Surgery Zhongnan Hospital of Wuhan UniversityWuhanHubei 430071PR China Department of Hepatobiliary and Pancreatic Surgery The First People's Hospital of JingmenJingmenHubei 448000PR China Guangzhou Women and Children's Medical Center Guangzhou Medical UniversityGuangzhouGuangdong 510120PR China Department of Hepatobiliary Surgery Tianjin Medical University General HospitalTianjin 300052PR China

To the Editor,Hepatocellular carcinoma(HCC)is a malignant tumor with the fourth highest incidence and the third highest mortality among all tumor sites in China.1 Finding new diagnostic markers and therapeutic molecul... 详细信息

关键词： malignant STAT3 mortality

Lipid metabolism reprogramming and its potential targets in cancer

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Cancer Communications 2018年第1期38卷 291-304页

作者： Chunming Cheng Feng Geng Xiang Cheng deliang guo Department of Radiation Oncology The Ohio State University James Comprehensive Cancer Center and College of MedicineColumbusOH 43210USA

Reprogramming of lipid metabolism is a newly recognized hallmark of *** lipid uptake,storage and lipogenesis occur in a variety of cancers and contribute to rapid tumor *** constitute the basic struc-ture of membranes and also function as signaling molecules and energy *** regulatory element-binding proteins(SREBPs),a family of membrane-bound transcription factors in the endoplasmic reticulum,play a central role in the regulation of lipid *** studies have revealed that SREBPs are highly up-regulated in various cancers and promote tumor *** cleavage-activating protein is a key transporter in the trafficking and activation of SREBPs as well as a critical glucose sensor,thus linking glucose metabolism and de novo lipid *** altered lipid metabolic pathways has become a promising anti-cancer *** review summarizes recent progress in our understanding of lipid metabolism regulation in malignancy,and highlights potential molecu-lar targets and their inhibitors for cancer treatment.

关键词： Lipid metabolism Cancer SCAP SREBPs Fatty acids Cholesterol Lipid droplets

Dynamics Modeling and Parameter Identification for a Coupled-Drive Dual-Arm Nursing Robot

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Chinese Journal of Mechanical Engineering 2024年第4期 256-270页

作者： Hao Lu Zhiqiang Yang deliang Zhu Fei Deng Shijie guo College of Electronic Information and Automation Tianjin University of Science and Technology Academy for Engineering & Technology Fudan University Shanghai Engineering Research Center of AI & Robotics School of Mechanical Engineering Hebei University of Technology

A dual-arm nursing robot can gently lift patients and transfer them between a bed and a wheelchair. With its lightweight design, high load-bearing capacity, and smooth surface, the coupled-drive joint is particularly well suited for these robots. However, the coupled nature of the joint disrupts the direct linear relationship between the input and output torques, posing challenges for dynamic modeling and practical applications. This study investigated the transmission mechanism of this joint and employed the Lagrangian method to construct a dynamic model of its internal dynamics. Building on this foundation, the Newton-Euler method was used to develop a dynamic model for the entire robotic arm. A continuously differentiable friction model was incorporated to reduce the vibrations caused by speed transitions to zero. An experimental method was designed to compensate for gravity, inertia,and modeling errors to identify the parameters of the friction model. This method establishes a mapping relationship between the friction force and motor current. In addition, a Fourier series-based excitation trajectory was developed to facilitate the identification of the dynamic model parameters of the robotic arm. Trajectory tracking experiments were conducted during the experimental validation phase, demonstrating the high accuracy of the dynamic model and the parameter identification method for the robotic arm. This study presents a dynamic modeling and parameter identification method for coupled-drive joint robotic arms, thereby establishing a foundation for motion control in humanoid nursing robots.

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Multi-dimensionality in plant root traits:progress and challenges

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Journal of Plant Ecology 2024年第4期17卷 1-8页

作者： Jiabao Zhao Binglin guo Yueshuang Hou Qingpei Yang Zhipei Feng Yong Zhao Xitian Yang guoqiang Fan deliang Kong College of Forestry Henan Agricultural UniversityZhengzhouChina

Plant roots,the major agent for water and nutrient acquisition,are fundamental for plant growth,evolution and ecosystem services that human beings depend on(Bardgett et al.2014;Weigelt et al.2023).Nutrient acquisition can be depicted by a wealth of traits of absorptive roots,the few terminal root branch orders with primarily developed tissues(guo et al.2008;McCormack et al.2015).

关键词： traits plant roots

Increased dependence on nitrogen-fixation of a native legume in competition with an invasive plant

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Plant Diversity 2024年第4期46卷 510-518页

作者： Meixu Han Haiyang Zhang Mingchao Liu Jinqi Tang Xiaocheng guo Weizheng Ren Yong Zhao Qingpei Yang Binglin guo Qinwen Han Yulong Feng Zhipei Feng Honghui Wu Xitian Yang deliang Kong College of Forestry Henan Agricultural UniversityZhengzhou 450002China College of Life Science Hebei UniversityBaoding 071002China Liaoning Key Laboratory for Biological Invasions and Global Changes College of Bioscience and BiotechnologyShenyang Agricultural UniversityShenyangLiaoning 110866China College of Horticulture China Agricultural UniversityBeijing 100193China State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China Institute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Key Laboratory of Arable Land Quality Monitoring and Evaluation Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China

Suppression of roots and/or their symbiotic microorganisms,such as mycorrhizal fungi and rhizobia,is an effective way for alien plants to outcompete native ***,little is known about how invasive and native plants interact with the quantity and activity of nutrient-acquisition *** a pot experiment was conducted with monoculture and mixed plantings of an invasive plant,Xanthium strumarium,and a common native legume,Glycine *** measured traits related to root and nodule quantity and activity and mycorrhizal *** to the monoculture,fine root quantity(biomass,surface area)and activity(root nitrogen(N)concentration,acid phosphatase activity)of *** decreased in mixed plantings;nodule quantity(biomass)decreased by 45%,while nodule activity in Nfixing via rhizobium increased by 106%;mycorrhizal colonization was *** of N fixation to leaf N content in *** increased in the mixed plantings,and this increase was attributed to a decrease in the rhizosphere soil N of *** in the mixed *** root quantity and activity,along with a higher mycorrhizal association was observed in *** in the mixed compared to ***,the invasive plant did not directly scavenge N from nodule-fixed N,but rather depleted the rhizosphere soil N of the legume,thereby stimulating the activity of N-fixation and increasing the dependence of the native legume on this N *** quantity-activity framework holds promise for future studies on how native legumes respond to alien plant invasions.

关键词： Mycorrhizal strategy Nitrogen depletion Plant invasion Root nutrient acquisition strategy Symbiotic nitrogen fixation

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脂质代谢重编程及其在癌症中潜在靶点的研究

癌症 2018年第11期37卷 473-493页

作者： Chunming Cheng Feng Geng Xiang Cheng deliang guo Department of Radiation Oncology The Ohio State University James Comprehensive Cancer Center and College of Medicine

脂质代谢的重编程是恶性肿瘤的一个新特征。在多种癌症中,脂肪摄取、储存和脂肪生成均被上调,这也促进了肿瘤的快速生长。脂质是构成膜的基本结构,并且具有信号分子和能量来源的功能。固醇调节元件结合蛋白(Sterol regulatory element-b... 详细信息

脂质代谢的重编程是恶性肿瘤的一个新特征。在多种癌症中,脂肪摄取、储存和脂肪生成均被上调,这也促进了肿瘤的快速生长。脂质是构成膜的基本结构,并且具有信号分子和能量来源的功能。固醇调节元件结合蛋白(Sterol regulatory element-binding proteins,SREBPs)是内质网中一类膜结合转录因子,在调节脂质代谢中起着核心作用。最近的研究表明,SREBPs在各种癌症中高度上调并促进肿瘤生长。SREBP切割激活蛋白(SREBP cleavage-activating protein,SCAP)是SREBPs转运和激活的关键转运蛋白,也是一种关键的葡萄糖传感器,因此它将葡萄糖代谢与脂类从头合成联系在一起。靶向变异的脂质代谢途径已成为一种很有前景的抗癌策略。本综述总结了近年来我们所知的对恶性肿瘤中脂质代谢调节的最新研究进展,并着重介绍了癌症治疗中潜在的分子靶点及其抑制剂。

关键词：脂质代谢癌症 SCAP SREBPs 脂肪酸胆固醇脂滴

真空热处理对APS-NiCoCrAlY+APS-YSZ热障涂层热循环寿命的影响

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金属热处理 2020年第12期45卷 47-52页

作者：薛文利陆涛黄佳华郭德亮中国航发上海商用航空发动机制造有限责任公司上海201306

通过大气等离子喷涂在HA188合金基材上制备NiCoCrAlY+YSZ热障涂层,然后分别对试样在高真空和低真空中进行1080℃的热处理。通过在1100℃对热处理前后的热障涂层进行热循环考核,并在具备EDS的扫描电镜下分析了热循环前后的显微组织和成... 详细信息

通过大气等离子喷涂在HA188合金基材上制备NiCoCrAlY+YSZ热障涂层,然后分别对试样在高真空和低真空中进行1080℃的热处理。通过在1100℃对热处理前后的热障涂层进行热循环考核,并在具备EDS的扫描电镜下分析了热循环前后的显微组织和成分。结果表明,真空热处理显著提高了APS-NiCoCrAlY+APS-YSZ热障涂层的热循环寿命,一方面是由于真空热处理后在APS-NiCoCrAlY/APS-YSZ界面上形成连续的TGO层受到了抑制,降低了由TGO产生的应力开裂,另一方面真空热处理后的涂层热循环时在APS-NiCoCrAlY的内部产生了更多的氧化物,在一定程度上降低了APS-NiCoCrAlY的热膨胀系数,减少了由APSNiCoCrAlY/APS-YSZ热膨胀系数不匹配造成的应力开裂。并且低真空热处理的涂层内部失效裂纹没有像高真空热处理的涂层那样均匀连续扩展。

关键词：真空热处理热障涂层热循环寿命

黑河中游绿洲不同景观单元表层土壤水分空间变异性

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中国水土保持科学 2013年第2期11卷 25-32页

作者：郭德亮胡伟樊军王力西北农林科技大学资源环境学院陕西杨凌712100 中国科学院地理科学与资源研究所北京100101 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨凌712100

了解黑河中游绿洲生态系统表层土壤水分空间分布规律可为绿洲生态系统水资源合理分配与利用提供参考。使用地统计学方法分析黑河中游绿洲8—10月戈壁、林地、农地3种典型景观单元表层土壤水分空间变异特征。结果表明:1)3种景观单元土壤... 详细信息

了解黑河中游绿洲生态系统表层土壤水分空间分布规律可为绿洲生态系统水资源合理分配与利用提供参考。使用地统计学方法分析黑河中游绿洲8—10月戈壁、林地、农地3种典型景观单元表层土壤水分空间变异特征。结果表明:1)3种景观单元土壤含水量从8—10月有下降趋势,呈中等变异特征且土壤水分相对变异(变异系数)一般在干燥时较大,绝对变异(标准差)在湿润时较大;2)表层土壤水分具有明显空间结构及季节变化特征,呈明显斑块状分布,最优拟合模型均为指数模型;土壤水分基台值和变程的变化大致与土壤平均含水量的变化呈相同趋势,具有中等和强烈的空间相关性,且10月份的土壤水分空间自相关性明显大于8和9月,相似性质斑块空间尺度有缩小趋势;3)在黑河中游绿洲区景观类型、土壤平均含水量、土壤、地貌、气候条件及人为管理等因素是造成黑河中游荒漠绿洲区表层土壤水分呈现时间和空间上明显差异的主导因素,其中平均含水量起的主导作用是持续存在的。

关键词：绿洲景观单元表层土壤水分空间变异性