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Science China(Technological Sciences) 2019年第3期62卷 464-471页

作者： YU PengCheng yuan yanchao School of Chemistry and Chemical Engineering South China University of Technology School of Materials Science and Engineering South China University of Technology

A novel three-dimensional(3D) carbon nanotube foams(CNTF) with ultrahigh specific surface area have been fabricated through a unique but facile one-step synthesis by using CO_2 as both carbon source and activating agent. The activation temperature and time have been adjusted, and the best sample demonstrates a specific surface area of 1959.8 m^2 g^(–1) and a total pore volume of 3.23 cm^3 g^(–1). A reversible capacity of about 870 mAhg^(–1) is maintained at 50 mAg^(–1) when the CNTF used as cathode materials. Meanwhile, the capacity is as large as 320 mAhg^(–1) at the current density of 2 A g^(–1) and the capacity retention is nearly 100% after 500 cycles. These excellent and highly stable battery performances should be attributed to the structural advantages of as-synthesized CNTFs generated by using a facile CO_2-assisted strategy, which may potentially be applied in large scale production of porous 3D carbon materials in the fields of energy storage and conversion.

关键词： carbon nanotube foam CO2-assisted activation ultrahigh surface area lithium ion battery

A novel online analyzer for accurate and rapid measurement of volatile fatty acids in anaerobic wastewater treatment

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Journal of Environmental Sciences 2022年第12期34卷 72-82页

作者： Qingshan Lin yanchao yuan Feixiang Zan Hui Lu Zongping Wang Gang Guo School of Environmental Science and Engineering Huazhong University of Science and Technology(HUST)Key Laboratory of Water and Wastewater TreatmentMOHURDWuhan 430074China Department of Environmental Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou 510275China

Volatile fatty acids(VFAs), which are largely generated during the anaerobic acidification process, are considered to be reliable indicators of the stable process operation. However,the common methods for monitoring VFAs are offline, and they are typically manual requiring time-consuming, costly and complex instruments. This study aims to develop a novel online analyzer for automatic measuring VFAs, which was based on the 5-p H point titration, embedded with a proportional-integral-derivative(PID) feedback control system. The results show that it can achieve accurate and rapid monitoring of VFAs ranging between 0-400 mg/L(<9 min/sample) but simultaneously faces the problems of overtitration and interference of complex characteristics of wastewater. In order to improve its accuracy and stability, the effects of three general coefficients(K_(I),K_(P), and K_(D)) of PID on the titration were investigated, and the optimal values of K_(I), K_(P), and K_(D)were found to be 1.5, 1.0, and-1.0~0.5,respectively. Besides, the initial titration speed was set at 0.06 m L/min, equal to the minimum speed of the peristaltic pump, and the dichotomy approach was integrated into the PID feedback controller. Owing to the above improvements, the relative mean deviation and standard deviation of measuring VFAs in both synthetic and real wastewaters were mostly lower than 5.0% and 5.0 mg/L, proving the online analyzer is rapid, accurate and reliable.

关键词： Volatile fatty acids Online analyzer 5-pH point titration PID feedback control Anaerobic process

Comprehensive analyses of the proteome and ubiquitome revealed mechanism of high temperature accelerating petal abscission in tree peony

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Horticultural Plant Journal 2024年第1期10卷 205-222页

作者： Chunying Liu Ziqi Liu yanchao yuan Yuxi Zhang Yifu Fang Junqiang Chen Shupeng Gai Key Laboratory of Plant Biotechnology in Shandong Province College of Life SciencesQingdao Agricultural UniversityQingdaoShandong 266109China Shandong Academy of Forestry JinanShandong 250014China

Tree peony(Paeonia suffruticosa Andrews)is a well-known ornamental plant with high economic value,but the short fluorescence is a key obstacle to its ornamental value and industry *** temperature accelerates flower senescence and abscission,but the associated mechanisms are poorly *** this study,the tandem mass tag(TMT)proteome and label-free quantitative ubiquitome from tree peony cut flowers treated with 20℃for 0 h(RT0),20℃or 28℃for 60 h(RT60 or HT60)were examined based on morphological observation,***,6970 proteins and 1545 lysine ubiquitinated(Kub)sites in 844 proteins were *** residues(such as glutamate and aspartate)neighboring the Kub sites were in preference,and 36.01%of the Kub sites were located on the protein *** differentially expressed proteins(DEPs)and Kub-DEPs in HT60 vs RT60 were mainly enriched in ribosomal protein,protein biosynthesis,secondary metabolites biosynthesis,flavonoid metabolism,carbohydrate catabolism,and auxin biosynthesis and signaling revealed by GO and KEGG analysis,accompanying the increase of endogenous abscisic acid(ABA)accumulation and decrease of endogenous indoleacetic acid(IAA)***,the expression patterns of six enzymes(SAMS,ACO,YUC,CHS,ANS and PFK)putatively with Kub modifications were analyzed by proteome and real-time quantitative *** cell-free degradation assays showed PsSAMS and PsACO proteins could be degraded via the 26 S proteasome system in tree peony ***,a working model was proposed for the acceleration of flower senescence and abscission by high *** summary,all results contributed to understanding the mechanism of flower senescence induced by high temperature and prolonging fluorescence in tree peony.

关键词： Tree peony Proteome Ubiquitome High temperature Flower senescence

PsRGL1 negatively regulates chilling- and gibberellin-induced dormancy release by PsF-box1-mediated targeting for proteolytic degradation in tree peony

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Horticulture Research 2023年第5期10卷 49-60页

作者： Linqiang Gao Demei Niu Tianyu Chi yanchao yuan Chunying Liu Shupeng Gai Yuxi Zhang College of Life Sciences Qingdao Agricultural UniversityQingdao 266109China University Key Laboratory of Plant Biotechnology in Shandong Province Qingdao 266109China

Tree peony bud endodormancy is a common survival strategy similar to many perennial woody plants in winter,and the activation of the GA signaling pathway is the key to breaking *** signal transduction is involved in many physiological *** the GA-GID1-DELLA regulatory module is conserved in many plants,it has a set of specific components that add complexity to the GA response *** proteins are key switches in GA ***,there is an urgent need to identify the key DELLA proteins involved in tree peony bud dormancy *** this study,the prolonged chilling increased the content of endogenously active ***1 among three DELLA proteins was significantly downregulated during chilling-and exogenous GA3-induced bud dormancy release by cell-free degradation assay,and a high level of polyubiquitination was *** PsRGL1 accelerated bud dormancy release by increasing the expression of the genes associated with dormancy release,including PsCYCD,PsEBB1,PsEBB3,PsBG6,and *** F-box protein family members responded to chilling and GA3 treatments,resulting in PsF-box1 *** two-hybrid and BiFC assays indicated that only PsF-box1 could bind to PsRGL1,and the binding site was in the C-terminal ***-box1 overexpression promoted dormancy release and upregulated the expression of the dormancy-related *** addition,yeast two-hybrid and pull-down assays showed that PsF-box1 also interacted with PsSKP1 to form an E3 ubiquitin *** findings enriched the molecular mechanism of the GA signaling pathway during dormancy release,and enhanced the understanding of tree peony bud endodormancy.

关键词： release tree breaking

Dual functions of PsmiR172b-PsTOE3 module in dormancy release and flowering in tree peony (Paeonia suffruticosa)

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Horticulture Research 2023年第4期10卷 174-186页

作者： Yuxi Zhang Linqiang Gao Yanyan Wang Demei Niu yanchao yuan Chunying Liu Xinmei Zhan Shupeng Gai College of Life Sciences Qingdao Agricultural UniversityQingdao266109China University Key Laboratory of Plant Biotechnology in Shandong Province Qingdao266109China

MicroRNAs(miRNAs)are non-coding RNAs that interact with target genes and are involved in many physiological processes in ***172-AP2 mainly plays a role in the regulation of f lowering time and floral organ *** dormancy release is necessary for forcing culture of tree peony in winter,but the mechanism of dormancy regulation is *** this study,we found that a miR172 family member,PsmiR172b,was downregulated during chilling-induced bud dormancy release in tree peony,exhibiting a trend opposite to that of *** ligase-mediated(RLM)5-RACE(rapid amplification of cDNA ends)confirmed that miR172b targeted PsTOE3,and the cleavage site was between bases 12(T)and 13(C)within the complementary site to *** functions of miR172b and PsTOE3 were detected by virus-induced gene silencing(VIGS)and their overexpression in tree peony ***172b negatively regulated bud dormancy release,but PsTOE3 promoted bud dormancy release,and the genes associated with bud dormancy release,including PsEBB1,PsEBB3,PsCYCD,and PsBG6,were *** analysis indicated that PsTOE3 directly regulated PsEBB1 by binding to its promoter,and the specific binding site was a C-repeat(ACCGAC).Ectopic expression in Arabidopsis revealed that the PsmiR172b-PsTOE3 module displayed conservative function in regulating f *** conclusion,our results provided a novel insight into the functions of PsmiR172-PsTOE3 and possible molecular mechanism underlying bud dormancy release in tree peony.

关键词： release functions bases

三聚氰胺-甲醛树脂包裹环氧树脂微胶囊的制备及表征

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高分子学报 2008年第5期18卷 472-480页

作者：袁彦超容敏智章明秋聚合物复合材料及功能材料教育部重点实验室中山大学材料科学研究所广州510275

针对环氧树脂基材料的自修复,选取四氢邻苯二甲酸二缩水甘油酯作为芯材,采用三聚氰胺-甲醛树脂为壁材,对其进行微胶囊化包裹.结果表明,制得的具有单囊结构的环氧树脂微胶囊,胶囊粒径较小(约6.7μm)、囊壁较薄(约0.2μm)、芯含量较高(83.... 详细信息

针对环氧树脂基材料的自修复,选取四氢邻苯二甲酸二缩水甘油酯作为芯材,采用三聚氰胺-甲醛树脂为壁材,对其进行微胶囊化包裹.结果表明,制得的具有单囊结构的环氧树脂微胶囊,胶囊粒径较小(约6.7μm)、囊壁较薄(约0.2μm)、芯含量较高(83.2 wt%),囊壁内、外表面光滑致密,胶囊具有良好的密闭性和耐热性;在微胶囊化过程中,三聚氰胺-甲醛树脂的缩聚反应动力学起关键作用,芯材没有参与囊壁形成的交联反应;包裹后的芯材活性保持不变,胶囊被复合到材料过程中囊芯活性也保持不变;胶囊的强度较高,能承受与基体材料复合过程中的外力作用,且与基体材料间粘结良好,在裂纹形成过程中能够随基体同时开裂.

关键词：自修复环氧树脂三聚氰胺-甲醛微胶囊

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交联壳聚糖树脂与Zn2+的配位作用

离子交换与吸附 2007年第6期23卷 469-474页

作者：朱再盛袁彦超陈炳稔广东药学院药科学院中山大学材料科学研究所 3. 华南师范大学化学与环境学院

研究了甲醛、环氧氯丙烷交联壳聚糖树脂(Chitosan crosslinked by aldehyde and epichlorohydrin,AECTS)吸附Zn2+后对树脂结构及性能所产生的影响。用FTIR、XRD、TG、DSC和SEM对吸附产物进行了结构表征,并深入分析了AECTS与Zn2+之间的... 详细信息

研究了甲醛、环氧氯丙烷交联壳聚糖树脂(Chitosan crosslinked by aldehyde and epichlorohydrin,AECTS)吸附Zn2+后对树脂结构及性能所产生的影响。用FTIR、XRD、TG、DSC和SEM对吸附产物进行了结构表征,并深入分析了AECTS与Zn2+之间的作用机理。结果表明,Zn2+与AECTS中的氨基发生配位而被吸附;AECTS吸附Zn2+后,结晶度下降、总体上热稳定性变差;Zn2+对AECTS的主链分解具有明显的催化功能;Zn2+的配位使得AECTS的表面形态发生了改变。

关键词：交联壳聚糖 Zn2+ 配位吸附机理

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交联壳聚糖树脂吸附Co2+的机理研究

离子交换与吸附 2005年第5期21卷 452-460页

作者：袁彦超朱再盛章明秋广州510224 中山大学材料科学研究所广东药学院药学系中山大学材料科学研究所广州510275

研究了甲醛、环氧氯丙烷交联壳聚糖(AECTS)对Co2+的吸附热力学行为,用FTIR、WXRD对吸附产物进行了结构表征,并研究了溶液中介质种类的不同对Co2+吸附量的影响。结果表明:AECTS主要以配位吸附和物理吸附形式吸附Co2+;树脂与Co2+配位后,... 详细信息

研究了甲醛、环氧氯丙烷交联壳聚糖(AECTS)对Co2+的吸附热力学行为,用FTIR、WXRD对吸附产物进行了结构表征,并研究了溶液中介质种类的不同对Co2+吸附量的影响。结果表明:AECTS主要以配位吸附和物理吸附形式吸附Co2+;树脂与Co2+配位后,结晶度下降;AECTS对Co2+的吸附行为同时符合Freundlich模型和Langmuir模型;吸附为自发的、放热的熵减小过程;不同介质对树脂吸附Co2+的影响大小顺序为HCl>CdCl2>MgCl2>NaCl,前两者使吸附量减小,后两者使吸附量增加,作用机理相差较大。

关键词：交联壳聚糖 Co2+ 吸附机理介质

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基于双忆阻混沌电路的分析及应用

山东科技大学学报（自然科学版） 2021年第6期40卷 85-97页

作者：袁延超袁方李玉霞山东科技大学电气与自动化工程学院山东青岛266590

设计了一个磁控忆阻器仿真器和一个有源荷控忆阻器仿真器,并基于这两种忆阻器设计了一个新的五维混沌电路系统。对系统进行动力学特性分析,包括平衡点集的求解、稳定性、分岔图、Lyapunov指数谱、共存分岔及多稳定性。结果表明,当参数... 详细信息

设计了一个磁控忆阻器仿真器和一个有源荷控忆阻器仿真器,并基于这两种忆阻器设计了一个新的五维混沌电路系统。对系统进行动力学特性分析,包括平衡点集的求解、稳定性、分岔图、Lyapunov指数谱、共存分岔及多稳定性。结果表明,当参数变化时,系统存在单周期、倍周期及混沌态。特别地,当取不同的初值时,系统出现共存混沌吸引子、共存倍周期和共存单周期的现象。通过分析随初值变化的Lyapunov指数谱与分岔图,表明系统具有多稳定性。对混沌电路进行Multisim电路仿真,仿真结果与Matlab数值仿真一致。此外,用实际器件搭建了硬件电路,该电路结构简单、易于制作,实验结果验证了数值仿真与电路仿真的正确性。最后,基于双忆阻混沌硬件电路实现,设计了一个随机信号发生器。该系统具有良好的初值灵敏性,可以与加密算法相结合,应用在信息加密和保密通信领域。

关键词：磁控忆阻器荷控忆阻器 Multisim电路仿真硬件电路随机信号发生器

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王千一钢琴曲《托卡塔》演奏技术分析

普洱学院学报 2023年第1期39卷 98-100页

作者：袁艳超沈阳音乐学院音乐教育学院辽宁沈阳110818

托卡塔是西方较为古老的音乐创作题材,拥有炫技性和节奏快的特征。王千一所创作的《托卡塔》,是其最杰出的代表作之一,能够将托卡塔最为鲜明的特征诠释出来,为听众带来全新的视听觉体验。结合《托卡塔》的曲式结构和创作手法,从《托卡... 详细信息

托卡塔是西方较为古老的音乐创作题材,拥有炫技性和节奏快的特征。王千一所创作的《托卡塔》,是其最杰出的代表作之一,能够将托卡塔最为鲜明的特征诠释出来,为听众带来全新的视听觉体验。结合《托卡塔》的曲式结构和创作手法,从《托卡塔》声部层次与节奏、力度与速度及踏板等演奏技巧出发,明确了作品的特色。

关键词：王千一《托卡塔》演奏技术