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Coordinated Shoot and Root Responses to Light Signaling in Arabidopsis

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Plant Communications 2020年第2期1卷 18-24页

作者： Yu Yang Hongtao LIU National Key Laboratory of Plant Molecular Genetics(NKLPMG) CAS Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and Ecology(SIPPE)Chinese Academy of Sciences200032 ShanghaiP.R.China University of Chinese Academy of Sciences Shanghai 200032P.R.China

Light is one of the most important environmental signals and regulates many biological processes in plants.Studies on light-regulated development have mainly focused on aspects of shoot growth,such as deetiolation,cotyledon opening,inhibition of hypocotyl elongation,flowering,and anthocyanin accumulation.However,recent studies have demonstrated that light is also involved in regulating root growth and development in Arabidopsis.In this review,we summarize the progress in understanding how shoots and roots coordinate their responses to light through different light-signaling components and pathways,including the COP1(CONSTITUTIVELY PHOTOMORPHOGENIC 1),HY5(ELONGATED HYPOCOTYL 5),and MYB73/MYB77(MYB DOMAIN PROTEIN 73/77)pathways.

关键词： light signal transduction root growth and development Arabidopsis

A New Elastoplastic 3D Sand Production Model for Fractured Gas Fields

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Fluid Dynamics & Materials Processing 2023年第7期19卷 1851-1862页

作者： Hongtao LIU hongtao Jing Zhixiong Tu Shiyong Qin Junhui Wei Xiaotong Yu Tarim Oilfield Oil and Gas Engineering Research Institute Korla841000China

Reservoirs characterized by high temperature,high-pressure,medium high cementation strength,low porosity,and low permeability,in general,are not affected by sand production issues.Since 2009,however,it is known that cases exists where sand is present and may represent a significant technical problem(e.g.,the the Dina II condensate gas field).In the present study,the main factors affecting sand production in this type of reservoir are considered(mechanical properties,stress fields,production system,completion method and gas flow pattern changes during the production process).On this basis,a new liquid-solid coupled porous elasto-plastic 3D sand production model is introduced and validated through comparison with effective sand production data.The related prediction errors are found to be within 15%,which represents the necessary prerequisite for the utilization of such a model for the elaboration of sand prevention measures.

关键词： Medium-high strength sand production mechanism fluid-solid coupling sand production prediction dynamic sand production pattern

Moving research direction in the field of metallic bioresorbable stents-A mini-review

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Bioactive Materials 2023年第6期24卷 20-25页

作者： Xiehui Chen Rong Chang Hongtao LIU Le Zhang Yufeng Zheng Shenzhen Longhua District Central Hospital&The Affiliated Central Hospital of Shenzhen Longhua District Guangdong Medical UniversityShenzhen518110China School of Materials Science and Engineering Peking UniversityBeijing100871China International Research Organization for Advanced Science and Technology Kumamoto University2-39-2Kumamoto860-8555Japan

In contrast to polymer bioresorbable stents(BRS)that exhibited suboptimal performance in clinical trials due to their deficient mechanical properties,metallic BRS with improved mechanical strength have made their way into the clinic and have demonstrated more promising results.In the roadmap of research and development of metallic BRS,magnesium and iron based biodegradable metal stents had been clinically used,and the zinc based biodegradable metal stents had been trailed in Mini-Pigs.In this mini-review paper,we demonstrate the current technology levels and point out the future R&D direction of metallic BRS.Magnesium based BRS should target for decreasing struct thickness meanwhile balancing with enough supporting strength.Iron based BRS should move towards high efficient absorption,conversion,metabolism,elimination of its degradation products.Zn based BRS should strive to improve mechanical stability,creep resistance and biocompatibility.Future R&D directions of metallic BRS should move towards new materials such as Molybdenum,intelligent stent integrated with degradable biosensors,and new stent with multiple biofunctions,such as NO release.

关键词： Bioresorbable stents Magnesium Iron Zinc Molybdenum

从《独行月球》回溯:致力于开发好故事的开心麻花影业——对话刘洪涛

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当代电影 2022年第11期 43-53页

作者：李紫涵刘洪涛饶曙光不详开心麻花影业中国电影评论学会

时间:2022年9月20日地点:开心麻花影业一、个人成长之路:处处与电影结缘饶曙光(以下简称饶):洪涛先生好!谢谢你接受《当代电影》的提议,与我进行这次对谈。大家都知道,你毕业于北京大学中文系。北京大学的学习经历对你的世界观、人生观... 详细信息

时间:2022年9月20日地点:开心麻花影业一、个人成长之路:处处与电影结缘饶曙光(以下简称饶):洪涛先生好!谢谢你接受《当代电影》的提议,与我进行这次对谈。大家都知道,你毕业于北京大学中文系。北京大学的学习经历对你的世界观、人生观有什么样的影响?对你一生的职业规划、职业生涯有什么样的影响?

关键词：成长之路开心麻花北京大学刘洪涛职业规划职业生涯人生观世界观

Research on the influence of grouted sleeves and assembled seams on the deformation and bearing capacity of compression-flexure member

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Earthquake Research Advances 2022年第4期2卷 46-52页

作者： Hongtao LIU Pengchao Kong Zuohu Wang Weizhang Liao School of Civil and Transportation Engineering Beijing Univ.of Civil Engineering and ArchitectureBeijing100044China

Grouted sleeves can effectively connect precast elements,but the effect of grouted sleeves for increased stiffness and assembled seam for weakening stiffness on the precast column’s mechanical properties is unclear.Based on the full-scale test results of precast columns connected with grouted sleeves and the correctness of the numerical models,the influence analysis of the individual and coupling action of the grouted sleeves and assembled seam on the deformation and bearing capacity of the precast column is carried out.The research results show that grouted sleeves significantly affect the deformation and peak bearing capacity of precast columns;when precast columns are subjected to the action of high axial pressure,grouted sleeves significantly affect the bearing capacity.However,the influence of assembled seams on the peaking capacity of the precast column is more obvious when it was tested under low axial compression.It is recommended that the connection position should be 2 times the height of the grouted sleeve from the bottom of the foundation.

关键词： Precast column Grouted sleeves Assembled seam Deformation Strength Numerical analysis

Enhancing anoxic denitrification of low C/N ratio wastewater with novel ZVI composite carriers

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Journal of Environmental Sciences 2022年第2期34卷 180-191页

作者： Yanping Shi Tao liu hongtao Yu Xie Quan Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China

External organic carbon sources are needed to provide electron donors for the denitrification of wastewater with a low COD/NO_(3)^(-)-N(C/N)ratio,increasing the treatment cost.The economic strategy is to enhance the bioactivity and/or biodiversity of denitrifiers to efficiently utilize organic substances in wastewater.In this study,novel zero-valent iron(ZVI)composite carriers were prepared and implemented in a suspended carrier biofilm reactor to enhance the bioactivity and/or biodiversity of denitrifiers.At the influent C/N ratio of 4(COD was 179.5±5.0 mg/L and TN was 44.2±0.8 mg/L),COD and TN removal efficiencies were 85.1%and 66.4%,respectively,in the reactors filled with 3 wt%ZVI composite carriers.In contrast,COD and TN removal efficiencies were 70.4%and 55.3%,respectively,in the reactor filled with conventional high-density polyethylene(HDPE)biofilm carriers.The biofilm formation on the 3 wt%ZVI composite carriers was optimized due to its higher roughness(surface square roughness increased from 76.0 nm to 93.8 nm)and favorable hydrophilicity(water contact angle dropped to 72.5°±1.4°from 94.3°±3.2°)compared with the HDPE biofilm carriers.In addition,heterotrophic denitrifiers,Thauera and Dechloromonas,were enriched,whereas autotrophic denitrifiers,Raoultella and Thiobacillus,exhibited high relative abundance in the biofilm of ZVI composite carriers.The coexistence of heterotrophic denitrifiers and autotrophic denitrifiers on the surface of ZVI composite carriers provided mixotrophic metabolism of denitrification(including heterotrophic and iron-based autotrophic),thereby ensuring effective denitrification for wastewater with a low C/N ratio without external organic carbon source addition.

关键词： ZVI Biofilm carrier Low C/N ratio Integrated floating fixed-film and activated sludge(IFFAS) Denitrification

Photobiology:Light signal transduction and photomorphogenesis^FA

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Journal of Integrative Plant Biology 2020年第9期62卷 1267-1269页

作者： Hongtao LIU Rongcheng Lin Xing Wang Deng National Key Laboratory of Plant Molecular Genetics(NKLPMG) CAS Center for Excellence in Molecular Plant Sciencesthe Chinese Academy of SciencesShanghai 200032China Key Laboratory of Photobiology Institute of Botanythe Chinese Academy of SciencesBeijing 100093China School of Advanced Agricultural Sciences Peking UniversityBeijing 100871China

Light is crucial for plants, not only because of photosynthesis, but also because of photomorphogenesis.As one of the most important environmental cues, light influences multiple responses in plants, including seed germination, seedling de-etiolation,shade avoidance, phototropism, stomata and chloroplast movement, circadian rhythms, and flowering time.

关键词： morphogenesis cues seedling

Flowering responses to light and temperature

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Science China(Life Sciences) 2016年第4期59卷 403-408页

作者： Li Li Xu Li Yawen liu Hongtao LIU National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and Ecology Shanghai Institutes for Biological SciencesChinese Academy of Sciences

Light and temperature signals are the most important environmental cues regulating plant growth and development. Plants have evolved various strategies to prepare for, and adapt to environmental changes. Plants integrate environmental cues with endogenous signals to regulate various physiological processes, including flowering time. There are at least five distinct pathways controlling flowering in the model plant Arabidopsis thaliana: the photoperiod pathway, the vernalization/thermosensory pathway, the autonomous floral initiation, the gibberellins pathway, and the age pathway. The photoperiod and temperature/vernalization pathways mainly perceive external signals from the environment, while the autonomous and age pathways transmit endogenous cues within plants. In many plant species, floral transition is precisely controlled by light signals(photoperiod) and temperature to optimize seed production in specific environments. The molecular mechanisms by which light and temperature control flowering responses have been revealed using forward and reverse genetic approaches. Here we focus on the recent advances in research on flowering responses to light and temperature.

关键词：温度信号开花时间反应植物生长发育温度控制环境因素光周期适应环境

Nonlinear empirical failure criterion for rocks under triaxial compression

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International Journal of Mining Science and Technology 2024年第3期34卷 351-369页

作者： Hongtao LIU Zhou Han Zijun Han Zihan Chen Qinyu liu Hongkai Zhang Rongguang Zhang Linfeng Guo School of Energy&Mining Engineering China University of Mining and Technology-BeijingBeijing 100083China China National Coal Association Beijing 100010China

Based on existing triaxial compression experimental data,a new empirical failure criterion with wide applicability was proposed considering hydrostatic pressure,second stress invariance,and maximum shear stress.Four fitting evaluation indicators were used to verify the consistency of the new failure criterion,and the differences with the other 6 failure criteria were discussed.The characteristics of the new failure criteria in the principal stress space were finally analyzed.The results indicate that(1)the new failure criterion exhibits strong predictive ability for triaxial experiments and has good applicability for both intact and jointed rocks;(2)the influence of hydrostatic pressure on the failure surface exhibits a non-linear trend,and different hydrostatic pressure also exhibits different distribution patterns on the deviatoric stress plane,with a distribution characteristic pattern of hexagonal snowflake-regular hexagon.The maximum shear stress has a torsional effect on the new criterion,in the three-dimensional failure surface.The parameters a and b of the rock have an impact on the failure surface morphology of the new criterion function on the offset surface.

关键词： surface. criterion hydrostatic