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Light(Science & Applications) 2020年第1期9卷 521-529页

作者： Liding wang zifeng Zhao Ge Zhan Huayi Fang Hannan Yang Tianyu Huang Yuewei Zhang Nan Jiang Lian Duan Zhiwei Liu Zuqiang Bian Zhenghong Lu Chunhui Huang Beijing National Laboratory for Molecular Sciences(BNLMS) State Key Laboratory of Rare Earth Materials Chemistry and ApplicationsBeijing Engineering Technology Research Centre of Active DisplayCollege of Chemistry and Molecular EngineeringPeking University100871 BeijingChina Tianjin Key Lab for Rare Earth Materials and Applications School of Materials Science and EngineeringNankai University300350 TianjinChina Department of Physics Yunnan University2 Cuihu Bei Lu650091 KunmingChina Key Lab of Organic Optoelectronics and Molecular Engineering of Ministry of Education Department of ChemistryTsinghua University100084 BeijingChina

Compared to red and green organic light-emitting diodes(OLEDs),blue OLEDs are still the bottleneck due to the lack of efficient emitters with simultaneous high exciton utilization efficiency(EUE)and short excited-state *** from the fluorescence,phosphorescence,thermally activated delayed fluorescence(TADF),and organic radical materials traditionally used in OLEDs,we demonstrate herein a new type of emitter,cerium(Ⅲ)complex Ce-1 with spin-allowed and parity-allowed d-f transition of the centre Ce^(3+) *** compound exhibits a high EUE up to 100% in OLEDs and a short excited-state lifetime of 42 ns,which is considerably faster than that achieved in efficient phosphorescence and TADF *** optimized OLEDs show an average maximum external quantum efficiency(EQE)of 12.4% and Commission Internationale de L’Eclairage(CIE)coordinates of(0.146,0.078).

关键词： diodes emitter transition

A NIR fluorescent probe for imaging thiophenol in the living system and revealing thiophenol-induced oxidative stress

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中国化学快报:英文版 2023年第8期34卷 497-501页

作者： Zesi wang Jiao Li Jiao Chen zifeng Cao Hui Li Yaopeng Cao Quanquan Li Mengyao She Ping Liu Shengyong Zhang Jianli Li Key Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education College of Chemistry&Materials ScienceNorthwest UniversityXi’an 710127China Key Laboratory of Resource Biology and Biotechnology in Western China Ministry of EducationBiomedicine Key Laboratory of Shaanxi ProvinceLab of Tissue EngineeringCollege of Life SciencesNorthwest UniversityXi’an 710127China Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity College of Urban and Environmental SciencesNorthwest UniversityXi’an 710127China

Thiophenol(PhSH)is an important raw material for organic synthesis,while its high toxicity to organisms makes it an environmental ***,it is crucial to accurately detect PhSH and explore its metabolic process in the living ***,a near-infrared(NIR)fluorescent probe TEM-FB was developed for sensing PhSH with a turn-on fluorescent signal at 719nm and a large Stokes shift(198 nm)based on generating the intramolecular charge transfer(ICT)***-FB shows high specificity and significant sensitivity towards PhSH(detection limit:10 nmol/L)via the aromatic nucleophilic substitution ***,it was successfully applied to image PhSH in multiple cell lines and in ***,we revealed the oxidative stress process caused by PhSH and demonstrated that the hydrogen peroxide(H_(2)O_(2))in cells would alleviate the poisonousness from exogenous PhSH for the first *** work provides a promising bioimaging tool for monitoring PhSH in living systems and visualizing the process of oxidative stress induced by PhSH.

关键词： Fluorescent probe Near-infrared Oxidative stress Thiophenol Large Stokes shift Dicyanoisophorone

Factors affecting genomic selection revealed by empirical evidence in maize

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The Crop Journal 2018年第4期6卷 341-352页

作者： Xiaogang Liu Hongwu wang Hui wang zifeng Guo Xiaojie Xu Jiacheng Liu Shanhong wang Wen-Xue Li Cheng Zou Boddupalli M.Prasanna Michael S.Olsen Changling Huang Yunbi Xu Institute of Crop Science National Key Facility of Crop Gene Resources and Genetic Improvement Chinese Academy of Agricultural Sciences International Maize and Wheat Improvement Center (CIMMYT) ICRAF campus International Maize and Wheat Improvement Center (CIMMYT)

Genomic selection(GS) as a promising molecular breeding strategy has been widely implemented and evaluated for plant breeding, because it has remarkable superiority in enhancing genetic gain, reducing breeding time and expenditure, and accelerating the breeding process. In this study the factors affecting prediction accuracy(rMG) in GS were evaluated systematically, using six agronomic traits(plant height, ear height, ear length, ear diameter,grain yield per plant and hundred-kernel weight) evaluated in one natural and two biparental populations. The factors examined included marker density, population size, heritability,statistical model, population relationships and the ratio of population size between the training and testing sets, the last being revealed by resampling individuals in different proportions from a population. Prediction accuracy continuously increased as marker density and population size increased and was positively correlated with heritability; rMGshowed a slight gain when the training set increased to three times as large as the testing set. Low predictive performance between unrelated populations could be attributed to different allele frequencies, and predictive ability and prediction accuracy could be improved by including more related lines in the training population. Among the seven statistical models examined, including ridge regression best linear unbiased prediction(RR-BLUP), genomic BLUP(GBLUP), Bayes A, Bayes B, Bayes C, Bayesian least absolute shrinkage and selection operator(Bayesian LASSO), and reproducing kernel Hilbert space(RKHS), the RKHS and additive-dominance model(Add + Dom model) showed credible ability for capturing non-additive effects, particularly for complex traits with low heritability. Empirical evidence generated in this study for GS-relevant factors will help plant breeders to develop GS-assisted breeding strategies for more efficient development of varieties.

关键词： Marker density Population size Population relationship Zea mays

Tenth National Council Meeting of CPAFFC Held in Beijing

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Voice of Friendship 2012年第3期 2-4页

作者： wang Jun Geng zifeng

The Meeting of the Tenth National Council of the CPAFFC was held in Beijing on May 15. More than 300 council members from the central and provincial (regional and municipal) organizations and all social circles attend... 详细信息

关键词： municipal provincial circles council attended dipl

基于逆向工程的骨盆复杂三维形态镜像对称性的数字解剖学研究

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中国骨与关节损伤杂志 2024年第2期39卷 113-118页

作者：郑秋宝陈梓锋邱健钊封挺邹贤典王永胜广州市番禺区中心医院创伤骨科广东511400

目的应用逆向工程技术验证双侧骨盆复杂三维形态镜像对称性,以探讨健侧骨盆是否可以作为患侧的参考模型。方法收集50名健康成人的骨盆CT图像数据并经Minics软件进行三维重建,将右侧半骨盆模型和依据左侧半骨盆镜像后的模型经Geomagic ... 详细信息

目的应用逆向工程技术验证双侧骨盆复杂三维形态镜像对称性,以探讨健侧骨盆是否可以作为患侧的参考模型。方法收集50名健康成人的骨盆CT图像数据并经Minics软件进行三维重建,将右侧半骨盆模型和依据左侧半骨盆镜像后的模型经Geomagic Qualify软件进行3D偏差分析,并对各模型的体积和表面积进行检测。同时对性别、年龄等因素进行研究,分析其对骨盆对称性的影响。结果双侧骨盆模型之间平均标准偏差为(1.11±0.13)mm,(91.96±3.13)%的数据在可允许的误差范围之内。双侧骨盆模型的体积和表面积比较结果显示,两者均无统计学意义(P>0.05)。性别和年龄分组在骨盆对称性上的差异同样无统计学意义(P>0.05)。3D色谱偏差图显示偏差最大的部位在韧带、肌肉附着处及骶髂关节面。结论双侧骨盆之间有高度的对称性,即健侧骨盆可以作为患侧骨盆的参考模型,这一研究结果为依据镜像对称性原理进行的研究提供了理论依据。

关键词：逆向工程骨盆对称性 3D偏差分析

Ag@Au core/shell triangular nanoplates with dual enzyme-like properties for the colorimetric sensing of glucose

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Chinese Chemical Letters 2020年第5期31卷 1133-1136页

作者： Ao Liu Mengmeng Li Jingxiang wang Fan Feng Yu Zhang Zhiwei Qiu Yuzhu Chen Benjamin Edem Meteku Congying Wen zifeng Yan Jingbin Zeng College of Science China University of Petroleum(East China)Qingdao 266580China Integrated Traditional Chinese and Western Medicine Hospital of Shandong Qingdao 266002China State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082China

Due to the serious harm of diabetes to human health,development of sensitive assays for glucose level is of high significance for early prevention and treatment of ***,most conventional enzyme-based glucose sensors suffer from high cost and low stability due to the inherent defects of natural ***,we develop a pure nanozyme-based glucose detection method using Ag@Au core/shell triangular nanoplates(TNPs),which combines glucose oxidase(GOD)-and horseradish peroxidase(HRP)-like activities of the Au shell and inherent plasmonic properties of Ag *** sensing mechanism is based on the fact that the Au shell possessed GOD-like activity,enabling the oxidation of glucose to produce H2O2,which can further etch the silver core,leading to the decrease of absorbance at 800 nm and the color change from blue to *** with the previous nanozymes-based glucose sensors,our method avoids the use of enzymes and organic chromogenic ***,the stability of the Ag@Au core/shell TNPs is much better than that of Ag TNPs due to the protection by the coating of the Au *** method was successfully applied to the detection of urine samples from patients with diabetes,indicating its practical applicability for real sample analysis.

关键词： Nanozyme Ag@Au core/shell Nanoplates Etching glucose Colorimetric sensing

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胺基磷酸钠在卡林型金矿高效分选中的应用

有色金属工程 2024年第6期14卷 90-98页

作者：赵海平刘敬智胡学平段文权高立强于梓丰王辉谭巧义刘志伟阮仁满中关村科技园区西城园管理委员会博士后科研工作站北方矿业有限责任公司分站北京100053 北方矿业有限责任公司北京100053 中国科学院过程工程研究所绿色过程与工程重点实验室北京100190 中国科学院战略金属资源绿色循环利用国家工程研究中心北京100190

卡林型金矿的高效分选是金矿回收面临的重要挑战。卡林型金矿中的金以微细粒的形式赋存于黄铁矿中,降低了晶体的有序性。早期的研究证明:氧化后的黄铁矿和白云石间会发生同质化效应,导致颗粒间的异相团聚,从而恶化卡林型金矿的分选效果... 详细信息

卡林型金矿的高效分选是金矿回收面临的重要挑战。卡林型金矿中的金以微细粒的形式赋存于黄铁矿中,降低了晶体的有序性。早期的研究证明:氧化后的黄铁矿和白云石间会发生同质化效应,导致颗粒间的异相团聚,从而恶化卡林型金矿的分选效果。基于黄铁矿和白云石间的相互作用机理,提出了“强化分散”的原型技术,并筛选出胺基磷酸钠来实现原型技术的应用,在实验室实验中取得了良好的效果。通过浊度试验对药剂强化分散作用进行了验证,利用人工混合矿和高低品位卡林型金矿实际矿石的浮选来验证药剂在矿物分选过程中的作用。结果显示:胺基磷酸钠的加入可实现提高精矿中Fe、Au回收率,降低MgO上浮比例的预期目标,同时将Au的富集比提高到3.5左右。结果证明:胺基磷酸钠可通过强化氧化黄铁矿和白云石颗粒的分散来提高黄铁矿和白云石间的分选效率,从而优化卡林型金矿的浮选指标,该原型技术为含黄铁矿和白云石类矿物间高效分选技术的开发提供了相应的借鉴,具有推广应用的潜力。

关键词：卡林型金矿胺基磷酸钠分选黄铁矿白云石

Fine Mapping of QTLs for Stigma Exsertion Rate from Oryza glaberrima by Chromosome Segment Substitution

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Rice science 2022年第1期29卷 55-66,I0024页

作者： TAN Quanya ZHU Haitao LIU Hui NI Yuerong WU Shengze LUAN Xin LIU Junwei YANG Weifeng YANG zifeng ZENG Ruizhen LIU Guifu wang Shaokui ZHANG Guiquan Guangdong Provincial Key Laboratory of Plant Molecular Breeding/State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources South China Agricultural UniversityGuangzhou 510642China

Stigma exsertion is an important trait for outcrossing ability in *** exsertion rate(SER)of male sterile lines(MSLs)is a key factor affecting F1-seed production in hybrid *** this study,seven QTLs for SER were detected on five chromosomes using a set of single-segment substitution lines(SSSLs)derived from *** of the QTLs were mapped in the estimated intervals of 92.5–333.0 ***-5 was located in a substitution segment of 92.5 *** ER-1 b and qS ER-8 b were respectively limited to 333.0 kb and 107.5 kb by secondary substitution ***-1 b and qSER-3 had bigger additive effects of 11.5%and 11.9%,respectively,while the other five QTLs had smaller additive effects from 5.7%to 8.6%.Open reading frames were identified in the regions of qS ER-5 and qSER-8 b in *** and *** *** mapping of the QTLs laid a foundation for the cloning of genes,and QTLs for SER will be used to develop MSLs with strong ability of outcrossing.

关键词： stigma exsertion QTL single-segment substitution line substitution mapping Oryza glaberrima

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长距离输油管道水击过程的模拟研究

山东化工 2024年第11期53卷 189-194页

作者：赵登博王慧敏刘坤杨智杰赵玉浩刘子锋张欣山东石油化工学院石油工程学院山东东营257061

目前石油石化行业的高速发展离不开管道的支持和保障,管道自身优势明显,已成为主要的油气储运手段,管道的瞬态研究工作必不可少。本文结合我国长距离输油管道的特点,利用软件模拟对长距离输油管道的水击问题进行探讨。针对管道不同的水... 详细信息

目前石油石化行业的高速发展离不开管道的支持和保障,管道自身优势明显,已成为主要的油气储运手段,管道的瞬态研究工作必不可少。本文结合我国长距离输油管道的特点,利用软件模拟对长距离输油管道的水击问题进行探讨。针对管道不同的水击工况,编写水击保护程序,并提出水击保护措施。研究表明,水击保护措施可有效避免管道长时间位于超压状态。

关键词：长距离输油管道水击模拟

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Study of the Change in Wave Velocity Ratio before and after Two Strong Earthquakes Using Airgun Source Data

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Earthquake Research in China 2019年第2期33卷 305-319页

作者： LIU zifeng YE Beng CHEN Jia ZHOU Qingyun wang Guangming PENG Guanling LI Yongli Yunnan Earthquake Agency Kunming 650224China Office of the Western Yunnan Earthquake Prediction Study Area China Earthquake AdministrationDali 671000YunnanChina

Using the signals excited by the large-volume airgun source at the Binchuan transmitting seismic station from January to June,2016,arrival-time data was acquired at four stations near the epicenter of the Eryuan MS4.5 and MS4.0 earthquakes on February 8,2016,as well as the epicenter of the Yunlong MS5.0 and Eryuan MS4.6 earthquakes on May 18,2016 through the waveform cross-correlation *** wave velocity ratio of the four stations was calculated using the single-station *** the same time,the b-value and the focal mechanism consistency parameters of the study area were also *** results show that:(1)the wave velocity ratio of each station experienced a process of decline-recovery-fast rise before the two strong earthquakes,and a significant quasi-synchronous rapid rise occurred within 3-12 days before the earthquake;(2)the timing of the rapid rise of the wave velocity ratio of the four stations before the Yunlong MS5.0 and Eryuan MS4.6 earthquakes were related to the epicentral *** station which observed the earliest increase in rapid rise is the farthest one from the epicenter,and the station where the rapid rise appeared in the latest is closest to the epicenter;(3)the form of change of the wave velocity ratio before the earthquake was different between stations located at different directions in the epicenter area;(4)the b-value and the focal mechanism consistency parameter which is commonly used to characterize the stress level both showed a downward trend before the two strong earthquakes,and were consistent with the change in the wave velocity *** to the preliminary analysis,the wave velocity ratio obtained by using airgun source can better reflect the change in the stress state of the underground medium.

关键词： Airgun source Wave velocity ratio b-value Focal mechanism consistency