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Boosting Circularly Polarized Luminescence of Organic Conjugated Systems via Twisted Intramolecular Charge Transfer

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Research 2020年第1期2020卷 593-602页

作者： Junfeng Li Chenxi Hou Chao Huang Shanqi Xu Xuelei Peng qi qi Wen-Yong lai Wei Huang Key Laboratory for Organic Electronics and Information Displays Institute of Advanced Materials(IAM)Nanjing University of Posts and Telecommunications9 Wenyuan RoadNanjing 210023China School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China Shaanxi Institute of Flexible Electronics(SIFE) Northwestern Polytechnical University(NPU)127 West Youyi RoadXi’an710072 ShaanxiChina

Realizing a high luminescence dissymmetry factor(g_(lum))is a paramount yet challenging issue in the research field of circularly polarized luminescence(CPL).Here,we reported a novel set of organic conjugated systems with twisted intramolecular charge transfer(TICT)characteristics based on conjugated o-carborane-binaphthyl dyads composing of binaphthyl units as chiral electron donors and o-carborane units as achiral electron acceptors,demonstrating intense CPL with large g_(lum) ***,single-crystalline o-1 exhibited a high-level brightness and a large g_(lum) factor as high as+0.13,whereas singlecrystalline o-2 processed a relatively low brightness with a decreased g_(lum) value *** significant diversity of CPL-active properties was triggered by the selective introduction of o-carborane units onto the binaphthyl *** from the large magnetic dipole transition moments in TICT states,the CPL activity of TICT o-carborane-based materials exhibited amplified circular *** study provides an efficient molecular engineering strategy for the rational design and development of highly efficient CPL-active materials.

关键词： materials circular conjugated

轻木人工林生长及各器官碳、氮、磷化学计量对氮添加的响应

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植物营养与肥料学报 2025年第1期31卷 188-200页

作者：文程敬吴俊文赵志娟陈刚李志琪段贵河杜官本梁文西南林业大学林学院云南昆明650224 西南林业大学材料与化工学院云南昆明650224 景洪市景洪农场有限责任公司云南西双版纳666303

【目的】研究轻木(Ochroma lagopus)人工林生长及各器官碳(C)、氮(N)、磷(P)化学计量特征对氮添加的响应,为轻木人工林的栽培提供理论依据。【方法】以两年生轻木为材料,在云南省勐腊县勐醒农场轻木人工林地进行田间试验,采用随机区组设... 详细信息

【目的】研究轻木(Ochroma lagopus)人工林生长及各器官碳(C)、氮(N)、磷(P)化学计量特征对氮添加的响应,为轻木人工林的栽培提供理论依据。【方法】以两年生轻木为材料,在云南省勐腊县勐醒农场轻木人工林地进行田间试验,采用随机区组设计,设置不施氮对照(CK)和施尿素、缓释肥300 g/株(N1、H1)、450g/株(N2、H2)、600 g/株(N3、H3) 7个处理,施肥时间为2023年6月,2023年10月取样,测定轻木树高、胸径,分析叶、枝、根中的C、N、P含量,并计算各器官化学计量特征值。【结果】与CK相比,低施氮量(N1、H1)处理的轻木胸径增加不显著,N1处理的树高增加也不显著,中、高施氮量处理(N2、N3、H2、H3)的胸径、树高均显著高于CK,但这4个处理间差异不显著。施氮对轻木枝和根中C含量无显著影响,但N3和H3降低了叶片中C含量;施氮显著提高枝、叶和根中N含量,且增幅随施氮量的增加而显著提高。施氮显著降低了叶片中P含量,降幅随施氮量的增加而显著升高,但H1处理的叶片P含量显著低于N1,而H2与N2,以及H3与N3处理之间无显著差异;N3、H3处理降低了树枝中P含量;施氮增加了根中P含量,且增幅随施氮量的增加而提高,N3处理的根中P含量显著高于N1处理,而3个硫包衣缓释肥处理间的根中P含量无显著差异。CK处理叶片N:P16,轻木生长由受N元素限制转变为受P元素限制,且H2、H3处理的叶片N:P显著高于N2、N3处理,即施用硫包衣缓释肥带来的磷限制大于尿素。相关性分析表明,轻木生长与各器官的养分含量及化学计量特征显著相关,且轻木生长受各器官的氮含量影响显著。表型可塑性与主成分分析结果显示,氮添加下轻木生长、各器官C、N、P含量及化学计量比特征的表型可塑性指数为0.05~0.52,主成分1和主成分2的累计方差贡献率为63.2%;轻木在氮添加处理下,主要通过调节各器官的N、P含量来适应外界变化,进而促进轻木的生长。【结论】氮添加对轻木人工林生长及各器官C、N、P化学计量特征有显著的影响,施用中、高量氮肥对提高轻木生长的效果优于低量氮肥,而且缓解了氮元素对轻木生长的限制,但影响了C、N、P在各器官中的分布,还引起了磷元素的限制,施用硫包衣缓释肥引起的磷元素限制更加严重。因此,在轻木人工林生产管理中,应注意氮肥的施用量,在施用硫包衣缓释肥时,尤其要注意补充磷肥。

关键词：轻木人工林氮添加化学计量特征相关性表型可塑性主要成分

Discussion of Environmental Problem and Study of Environmental Impact on Steel Industry in China

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Journal of Iron and Steel Research International 2002年第2期9卷 24-27页

作者： ZHOU He-min LI gui-qi NIE Zuo-ren ZUO Tie-yong Central Iron&Steel Research Institute Beijing Polytechnic University Central-South University

The environmental conditions in steel industry were discussed in *** was also pointed out that it was necessary to reduce the quantity of waste generated and discharged by improving the raw material,energy structure and consumption rate,and reinforcing the waste control and *** the same time,the relevant mathematical models of environmental impact were set up on the basis of raw material consumption,energy consumption and waste generation and discharge in different technical routes of *** result showed that the production route of DR-iron clearly has more environmental advantages over that of BF-hot metal.

关键词： iron steel production route environmental impact mathematical model

天山中段城市化水平与生态环境质量时空耦合研究

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生态与农村环境学报 2025年第2期41卷 172-182页

作者：马小淞闫庆武移明昊李珂颀李桂娥吴子豪江苏国土资源智库中国矿业大学研究基地江苏徐州221116 中国矿业大学环境与测绘学院江苏徐州221116 中国矿业大学公共管理学院江苏徐州221116

为深入探究天山中段城市化水平与生态环境质量的时空耦合关系,从人口城市化、经济城市化、空间城市化以及交通城市化4个维度构建综合指标代表城市化水平,从绿度(NDVI)、湿度(WET)、热度(LST)、干度(NDBSI)和盐度(SI-T)5个方面构建遥感... 详细信息

为深入探究天山中段城市化水平与生态环境质量的时空耦合关系,从人口城市化、经济城市化、空间城市化以及交通城市化4个维度构建综合指标代表城市化水平,从绿度(NDVI)、湿度(WET)、热度(LST)、干度(NDBSI)和盐度(SI-T)5个方面构建遥感生态指数代表生态环境质量,借助耦合协调度模型探究两者的时空耦合关系,并分析2014—2022年城市化水平与生态环境质量耦合协调系统和2个子系统间不同模式的变化。结果表明:(1)天山中段整体综合城市化水平较低,发展速度较快,高城市化区域主要位于天山北坡城市群。(2)生态环境质量整体相对较差,历年质量等级在“中”及以上地区仅约占30%,研究区中部地区及西北地区生态环境较好,绝大部分地区呈现出稳定或者缓慢提升的趋势。(3)天山中段耦合协调度整体较低,呈缓慢上升趋势,平均水平均处于严重失调状态;研究期间有7.96%的区域耦合协调等级提升,其中城市化发展牺牲了生态环境的区域占比为43.33%,城市发展受到生态环境制约的区域占比为1.75%;0.86%的区域耦合协调等级降低,其中严重的制约关系致使系统整体发展失调的区域占比为43.34%,城市化水平与生态环境质量均有较大幅度降低的区域占比为56.58%。

关键词：城市化生态环境质量耦合协调度时空变化天山中段

Aquathermolysis of heavy crude oil with ferric oleate catalyst

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Petroleum Science 2018年第3期15卷 613-624页

作者： Yun-Rui Li qiu-Ye Li Xiao-Dong Wang lai-gui Yu Jian-Jun Yang Engineering Research Center for Nanomaterials Henan University

Oil-soluble catalysts could be of special significance for reducing the viscosity of heavy crude oil, because of their good dispersion in crude oil and high catalytic efficiency toward aquathermolysis. Ferric oleate was synthesized and applied as catalyst in the aquathermolysis reaction of Shengli heavy oil. It was found that ferric oleate was more efficient for heavy oil cracking than Co and Ni oleates. Besides, it was superior to oleic acid and inorganic ferric nitrate and achieved the highest viscosity reduction rate of up to 86.1%. In addition, the changes in the components of Shengli heavy oil before and after aquathermolysis were investigated by elemental analysis, Fourier transform infrared spectrometry, and ^1H nuclear magnetic resonance spectroscopy. Results indicated that ferric oleate contributed to a significant increase in the content of light components and decrease in the content of resin, N and S. The as-prepared ferric oleate showed good activity for reducing the viscosity and improving the quality of the heavy crude oil, showing promising application potential in aquathermolysis of heavy crude oil.

关键词： Heavy oil Viscosity reduction Aquathermolysis Ferric oleate Catalyst

Endopeptidase Isoenzyme Characteristics in Cucumis sativus Leaves During Dark-induced Senescence

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Journal of Integrative Plant Biology 2007年第4期49卷 507-514页

作者： Peng Zhang Fei Wang Lie-Feng Zhang qi Rui Lang-lai Xu College of Life Sciences Nanjing Agricultural University Nanjing 210095 China

The changes and characteristics of endopeptidase （EP） isoenzymes in cucumber （Cucumis sativus L.） leaves during dark-induced senescence were investigated by activity staining after gradient-polyacrylamide gel electrophoresis （G-PAGE） containing co-polymerized gelatin as substrate. The results showed that both the chlorophyll and the protein contents of leaves were decreased, and the protein degradation was correlated with the increase of proteolytic activity during the course of leaf senescence. Meanwhile, nine cucumber endopeptidases isoenzymes （CEP） with 140, 120, 106, 94, 76, 55, 46, 39 and 35 kDa molecular weights were detected. Four of these, CEP2, 3, 4 and CEP9 appeared all the time, but the changes of the activity were different during incubation. Another four CEPs （CEP5, 6, 7 and CEP8） whose activities increased with dark-induced time were only detected in senescent leaves. Furthermore, the biochemical properties of these nine CEP were also characterized. All the CEPs had high activities from 35 ℃ to 45 ℃, and the optimum temperature was found to be 40 ℃. However, the activities of CEPs were not detected below 25 ℃ or over 60 ℃. The activity bands appeared at a wide range of pH from 5.0 to 9.0, but the optimum pH was found at 7.0. No CEPs were detected at pH 4 or pH 10. By inhibition analysis we concluded that CEP2, 3, 4 and CEP9 were serine endopeptidases and CEP6 was a kind of cysteine protease. It is suggested that serine endopeptidases might play a major role in cucumber leaf senescence, and for the first time, six senescencerelated endopeptidases （CEP1, 5, 6, 7, 8 and 9） were found in cucumber leaves.

关键词： Cucumis sativus cucumber endopeptidase leaf senescence.

Additive manufacturing of metallic glasses and high-entropy alloys:Significance,unsettled issues,and future directions

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Journal of Materials Science & Technology 2023年第9期140卷 79-120页

作者： Haishun Liu Dengfeng Yang qi Jiang Yangyang Jiang Weiming Yang Lin Liu lai-Chang Zhang School of Materials Sciences and Physics China University of Mining and TechnologyXuzhou 221116China State Key Laboratory for Geomechanics and Deep Underground Engineering School of Mechanics and Civil EngineeringChina University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Material Processing and Die&Mould Technology and School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Engineering Edith Cowan University270 Joondalup DriveJoondalupPerthWA 6027Australia

As two kinds of well-known prominent high-performance alloys,metallic glasses(MGs)and high-entropy alloys(HEAs)have attracted increasing *** of them contain multiple alloying components,demonstrate intriguing microstructures,and exhibit excellent properties;however,their unique performances are closely dependent on the fabrication process,although they are limited due to the need for rapid solidification during *** the other hand,additive manufacturing(AM)can be used to fabricate complex parts via rapid solidification,thus saving *** advantages provide AM with a great possibility to produce MG and HEA materials with tunable microstructures therefore properties,and corresponding parts with complex geometries,large dimensions,and more *** paper provides a comprehensive and systematic overview of the manufacturing and properties of MGs and HEAs using AM *** correlation between MGs and HEAs with conventional manufacturing meth-ods and the difficulties encountered are retrospectively ***,this review specifically focuses on the recent research advances in MGs and HEAs fabricated using AM ***,various properties of the AM-fabricated MGs and HEAs are ***,the remaining issues and potential solutions,challenges,and future directions on the AM of MGs and HEAs are also presented.

关键词： Additive manufacturing Powder bed fusion Metallic glasses High-entropy alloys Research status

Anti-pseudo-allergic components in licorice extract inhibit mast cell degranulation and calcium influx

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Chinese Journal of Natural Medicines 2022年第6期20卷 421-431页

作者： WANG Lu HU gui-Zhou LU Yin JIANG Shu-Jun qi Jin SU Hua National Center of Colorectal Disease Nanjing Hospital of Chinese Medicine Affiliated to Nanjing University of Chinese MedicineNanjing 210022China Department of Pharmacy Jinling HospitalNanjing 210002China Jiangsu Key Laboratory of TCM Evaluation and Translation Research School of Traditional Chinese PharmacyChina Pharmaceutical UniversityNanjing 211198China

Pseudo-allergic reactions(PARs)widely occur upon application of drugs or functional ***-pseudo-allergic ingredients from natural products have attracted much *** study aimed to investigate anti-pseudo-allergic compounds in *** anti-pseudo-allergic effect of licorice extract was evaluated in rat basophilic leukemia 2H3(RBL-2H3)***-pseudo-allergic compounds were screened by using RBL-2H3 cell extraction and the effects of target components were verified further in RBL-2H3 cells,mouse peritoneal mast cells(MPMCs)and *** docking and human MRGPRX2-expressing HEK293T cells(MRGPRX2-HEK293T cells)extraction were performed to determine the potential ligands of MAS-related G protein-coupled receptor-X2(MRGPRX2),a pivotal target for *** acid(GA)and licorice chalcone A(LA)were screened and shown to inhibit Compound48/80-induced degranulation and calcium influx in RBL-2H3 *** and LA also inhibited degranulation in MPMCs and increase of histamine and TNF-a in *** could bind to MRGPRX2,as determined by molecular docking and MRGPRX2-HEK293T cell *** study provides a strong rationale for using GA and LA as novel treatment options for *** is a potential ligand of MRGPRX2.

关键词： Glycyrrhiza uralensis Anti-pseudo-allergy Glycyrrhizic acid Licorice chalcone A MAS-related G protein-coupled receptor-X2

Mass spectrum and strong decays of strangeonium in a constituent quark model

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Chinese Physics C 2021年第2期45卷 282-318页

作者： qi Li Long-Cheng gui Ming-Sheng Liu qi-Fang Lü Xian-Hui Zhong Department of Physics Hunan Normal UniversityChangsha 410081China Synergetic Innovation Center for Quantum Effects and Applications(SICQEA) Changsha 410081China Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha 410081China

In this work we calculate the mass spectrum of strangeonium up to the 3D multiplet within a nonrelativistic linear potential quark ***,using the obtained wave functions,we also evaluate the strong decays of the strangeonium states with the ^3P_0 *** on our successful explanations of the well established states φ(1020) , φ(1680) , h_1(1415) , f'_2(1525) ,and φ_3(1850) ,we further discuss the possible assignments of strangeonium-like states from experiments by combining our theoretical results with *** is found that some resonances,such as f_2(2010) and f_2(2150) ,listed by the Particle Data Group,and X(2062) and X(2500) ,newly observed by BESIII,may be interpreted as strangeonium *** possibility of φ(2170) as a candidate for φ(3S) or φ(2D) cannot be *** expect our results to provide useful references for looking for the missing s\bar{s} states in future experiments.

关键词： mass spectrum strangeonium strong decay