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Liquid-metals-induced formation of MXene/polyacrylamide composite organohydrogels for wearable flexible electronics

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Nano Research 2024年第3期17卷 1913-1922页

作者： Minying wu Bin Chen Xueliang Fan Tong Ye Yuanyuan Fang Qian Zhang Fangzhou Zhou yajun Wang Yi Tang Department of Chemistry Fudan UniversityShanghai 200433China College of Chemistry&Materials Engineering Wenzhou UniversityWenzhou 325027China

Organohydrogels have demonstrated superior environmental adaptability and frost resistance compared to conventional hydrogels,thereby prompting considerable interests in the development and design of innovative ***,we report an effective one-pot method for fabricating MXene/polyacrylamide(MXene/PAM)composite organohydrogel(MAOH)by employing Ga liquid metals(Ga LMs)as a highly reactive component in the induced free radical polymerization reaction,without the need for additional heating or cross-linking *** synthetic protocol addresses the time-consuming and organic solvent waste concerns associated with traditional solvent displacement methods for organohydrogel *** incorporation of MXene not only highly enhances the conductivity but also confers improved mechanical properties of *** MAOH exhibits excellent environmental adaptability(>7 d),sustained moisture retention,remarkable self-healing capabilities,and outstanding mechanical properties under low temperatures(-20℃).It demonstrates exceptional performance in micro-motion monitoring,rapid response time(125 ms),superior stretchability,and a broad range of strains(0.3%–600%).Therefore,the designed MAOH has great potential for applications in diverse fields such as prosthetics,electronic skin,human–machine interaction,and smart terminals.

关键词： organohydrogels MXene conductivity mechanical properties environmental adaptability

Top-Down技术控制图法评定X射线荧光光谱法测定铁矿中SiO_(2)的不确定度

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云南化工 2024年第6期51卷 96-99页

作者：冯丽丽丁仕兵徐小茗管嵩吴雅俊宋飞青岛海关技术中心山东青岛266500

依据标准GB/6730.62—2005《铁矿石钙、硅、镁、钛、磷、锰、铝和钡含量的测定波长色散X射线荧光光谱法》测定铁矿石中SiO_(2)含量。将SiO_(2)质量分数为8.78%的含砷铁矿标准样品YSBC 14721—98作为质控样品,不同人员不同时间对铁矿质... 详细信息

依据标准GB/6730.62—2005《铁矿石钙、硅、镁、钛、磷、锰、铝和钡含量的测定波长色散X射线荧光光谱法》测定铁矿石中SiO_(2)含量。将SiO_(2)质量分数为8.78%的含砷铁矿标准样品YSBC 14721—98作为质控样品,不同人员不同时间对铁矿质控样品进行测量得到20个数据,离群值检验后,依据国标GB/T 27407—2010和GB/T 27411—2012中评定过程进行Top-Down技术控制图法不确定度评定。期间精密度在重复性和再现性标准偏差之间,评价合理;平均偏倚和“0”没有显著性差异,无需校正。检测某铁矿样品,SiO_(2)质量分数5.24%,由期间精密度带来的不确定度为0.0256%,由偏倚带来的不确定度为0.0313%。由这两项合成的标准不确定度u为0.0404%,取包含概率p=95%,包含因子k=2,扩展不确定度U为0.08%。评定方法既得到了不确定度,又和日常质控结合起来,保证了检测质量,值得实验室推广使用。

关键词： Top-Down技术控制图法不确定度铁矿 SiO_(2)含量

SEGMENTATION AND 3D RECONSTRUCTION OF ANIMAL LIVER VESSELS BASED ON MR IMAGING

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SEGMENTATION AND 3D RECONSTRUCTION OF ANIMAL LIVER VESSELS B...

Highly dispersed Ru nanospecies on N-doped carbon/MXene composite for highly efficient alkaline hydrogen evolution

第十一届北京分析测试学术报告会暨展览会(BCEIA 2005)

作者： yajun wu Anpei YE Xiaoying WANG School of EE & CS Peking University Department of Radiology Peking University First Hospital

There are more than 5000 children dead from crocking up of liver function because of abnormality of *** only way to treat the diseases related to the liver function is the liver *** now people can only perform the spl...

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Chinese Chemical Letters 2024年第4期35卷 153-159页

作者： Minying wu Xueliang Fan Wenbiao Zhang Bin Chen Tong Ye Qian Zhang Yuanyuan Fang yajun Wang Yi Tang Department of Chemistry Shanghai Key Laboratory of Molecular Catalysis and Innovative Materialsand Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China College of Chemistry&Materials Engineering Wenzhou UniversityWenzhou 325027China

Hydrogen has emerged as a promising environmentally friendly energy source. The development of lowcost, highly active, stable, and easily synthesized catalysts for hydrogen evolution reactions(HER) remains a significant challenge. This study explored the synthesis of nitrogen-doped MXene-based composite catalysts for enhanced HER performance. By thermally decomposing RuCl_(3) coordinated with melamine and formaldehyde resin, we successfully introduced nitrogen-doped carbon(N–C) with highly dispersed ruthenium(Ru) onto the MXene surface. The calcination temperature played a crucial role in controlling the size of Ru nanoparticles(Ru NPs) and the proportion of Ru single-atom(Ru SA), thereby facilitating the synergistic enhancement of HER performance by Ru NPs and Ru SA. The resulting catalyst prepared with a calcination temperature of 600℃, Ti_(3)C_(2)T_x-N/C-Ru-600(TNCR-600), exhibited exceptional HER activity(η10= 17 m V) and stability(160 h) under alkaline conditions. This work presented a simple and effective strategy for synthesizing composite catalysts, offering new insights into the design and regulation of high-performance Ru-based catalysts for hydrogen production.

关键词： HER activity Highly dispersed Ru-based catalysts MXene Alkaline condition

基于理论发展的管理研究范式选择与中国管理学者定位

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管理学报 2015年第5期12卷 625-637页

作者：武亚军北京大学光华管理学院

在"中西理(论)实(践)"交叉的十字路口,中国管理学者面临着路线选择的挑战。从理论发展的目的出发,在明确理论的内涵和管理理论的衡量标准,梳理西方管理研究的多元范式、不同方法论特点及理论生产类型之后,以波特等西方著名学者的实践为... 详细信息

在"中西理(论)实(践)"交叉的十字路口,中国管理学者面临着路线选择的挑战。从理论发展的目的出发,在明确理论的内涵和管理理论的衡量标准,梳理西方管理研究的多元范式、不同方法论特点及理论生产类型之后,以波特等西方著名学者的实践为例,对管理学者的差异定位进行了说明。研究认为,中国的管理学者应该根据自身的特点,批判性吸收西方管理学研究的多元范式和方法论,从有利于开展自己感兴趣的研究问题出发,确定学者个人的主导研究范式和理论类型定位;有志于管理理论发展的本土学者,应在研究范式和方法论提升的基础上,发展有世界水平的"中国学问";中国管理学术共同体的健康发展依赖于不同学者的合理定位和学术共同体内部的多样化发展。

关键词：研究范式理论构建方法论中国学者定位

中国本土新兴企业的战略双重性:基于华为、联想和海尔实践的理论探索

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管理世界 2009年第12期25卷 120-136页

作者：武亚军北京大学光华管理学院

从企业与环境的动态匹配观点出发,以战略的产业组织、资源基础观和制度基础理论为依据,本文探讨了中国转型发展时期的制度与产业的复杂动态特征及传统文化特质的战略影响,提出了本土新兴成长型企业需具备战略复杂—简练双重性的理论观... 详细信息

从企业与环境的动态匹配观点出发,以战略的产业组织、资源基础观和制度基础理论为依据,本文探讨了中国转型发展时期的制度与产业的复杂动态特征及传统文化特质的战略影响,提出了本土新兴成长型企业需具备战略复杂—简练双重性的理论观点。在此基础上,分析和归纳了本土新兴企业的战略复杂性的5个基本维度和战略简练性的两类元规则及其作用,并以华为、联想和海尔案例加以论证和阐释,分析了其面临的战略挑战。文章倡导迈向一个解释中国本土新兴成长型企业战略行为的整合框架,并对其管理认知基础和应用含义进行了探讨。最后,论文对进一步的研究和本土化战略理论发展进行了展望。

关键词：转型发展战略复杂性战略简练性双重性本土新兴企业

Camellia sinensis CsMYB4a participates in regulation of stamen growth by interaction with auxin signaling transduction repressor CsAUX/IAA4

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The Crop Journal 2024年第1期12卷 188-201页

作者： Guoliang Ma Mingzhuo Li Yingling wu Changjuan Jiang Yifan Chen Dawei Xing Yue Zhao yajun Liu Xiaolan Jiang Tao Xia Liping Gao School of Life Science Anhui Agricultural UniversityHefei 230036AnhuiChina Plant for Human Health Institute Department of Plant and Microbial BiologyNorth Carolina State UniversityKannapolisNC 28081USA State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Tea Processing of Ministry of Agriculture/Anhui Provincial Laboratory of Tea Plant Biology and Utilization Anhui Agricultural UniversityHefei 230036AnhuiChina

Subgroup 4(Sg4)members of the R2R3-MYB are generally known as negative regulators of the phenylpropanoid pathway in *** previous research showed that a R2R3-MYB Sg4 member from Camellia sinensis(CsMYB4a)inhibits expression of some genes in the phenylpropanoid pathway,but its physiological function in the tea plant remained ***,CsMYB4a was found to be highly expressed in anther and filaments,and participated in regulating filament *** analysis and exogenous auxin treatment showed that the target of CsMYB4a might be the auxin signal ***/indole-3-acetic acid 4(AUX/IAA4),a repressor in auxin signal transduction,was detected from a yeast two-hybrid screen using CsMYB4a as *** silencing assays showed that both CsIAA4 and CsMYB4a regulate filament *** plants overexpressing CsIAA4 were insensitive to exogenous a-NAA,consistent with overexpression of ***-protein interaction experiments revealed that CsMYB4a interacts with N-terminal of CsIAA4 to prevent CsIAA4 *** out of the endogenous NtIAA4 gene,a CsIAA4 homolog,in tobacco alleviated filament growth inhibition and a-NAA insensitivity in plants overexpressing *** results strongly suggest that CsMYB4a works synergistically with CsIAA4 and participates in regulation of the auxin pathway in stamen.

关键词： AUX/IAA4 Auxin signaling CsMYB4a Subgroup 4 R2R3-MYB

Transcriptomic Analysis Reveals the Formation Mechanism of Anthocyanins Light-Independent Synthesis in Chrysanthemum

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Phyton-International Journal of Experimental Botany 2024年第7期93卷 1599-1621页

作者： Fangye Liu Jiaping Qu yajun Li Jiawei Fan Yumeng Cui Jingwen wu Xueqi Gu Xia Li He Huang Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing Key Laboratory of Ornamental Plants Germplasm Innovation&Molecular BreedingNational Engineering Research Center for FloricultureBeijing Laboratory of Urban and Rural Ecological EnvironmentKey Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Education MinistrySchool of Landscape ArchitectureBeijing Forestry UniversityBeijing100083China Urban Construction School Beijing City UniversityBeijing100083China

Chrysanthemum×morifolium is a horticultural crop which plays a vital role in theﬂower industry with signiﬁ-cant economic value and has a cultivation history of over three thousand years in *** accumulation of anthocyanins is always affected by ***,we revealed that anthocyanin accumulation is highly dependent on light in‘2021135’genotype chrysanthemum,while it is light-independent in‘2001402’genotype ***,no literature has been reported regarding the non-photosensitive chrysanthemum in anthocya-nins light-independent synthesis *** the phenotype analysis of 44 F1 generations,we found that light-independence is a dominant trait which can be stable inherited by *** transcriptome of the rayﬂorets of‘2021135’and‘2001402’under light and bagging treatment were sequenced and *** on weighted gene co-expression network analysis(WGCNA),K-means analysis,and Real-Time Quantitative Poly-merase Chain Reaction(RT-qPCR)analysis,16 genes were highly correlated with the anthocyanin *** anthocyanin content of rayﬂorets treated with different light-quality conditions indicated that blue light signiﬁ-cantly affected anthocyanin *** Yeast one-hybrid analysis,CmBIC1.1 and CmBIC1.2 can directly regulate the anthocyanin structural gene *** our study,we revealed the important characteristics of light-independent anthocyanin synthesis in chrysanthemums and screened regulatory factors in light-depen-dent and light-independent anthocyanin synthesis *** results laid the groundwork for subsequent ana-lysis of the molecular mechanism involved in the light-independent synthesis of anthocyanins in chrysanthemums.

关键词： Chrysanthemum non-photosensitive transcriptome anthocyanin biosynthesis

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盐芥ThHKT1基因的克隆

江苏农业科学 2006年第6期34卷 21-24页

作者：蔡小宁杨平贲爱玲续晨王敏 wu yajun 南京晓庄学院生命科学系安徽农业大学农学院 Utah State University Logan UT84322USA

以盐芥为材料,依据拟南芥AtHKT1基因的序列设计引物,扩增出盐芥中ThHKT1基因的部分序列。然后使用快速扩增(RACE)方法,从盐芥中克隆到ThHKT1基因cDNA序列。该序列全长1817bp,推测编码区长度为1503bp,编码500个氨基酸,等电点为8.82。其... 详细信息

以盐芥为材料,依据拟南芥AtHKT1基因的序列设计引物,扩增出盐芥中ThHKT1基因的部分序列。然后使用快速扩增(RACE)方法,从盐芥中克隆到ThHKT1基因cDNA序列。该序列全长1817bp,推测编码区长度为1503bp,编码500个氨基酸,等电点为8.82。其编码序列和氨基酸序列与拟南芥AtHKT1基因的相应序列同源性分别为82.8%和77.3%。

关键词：盐芥 ThHKT1基因克隆 cDNA RACE