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Microwave-assisted controllable synthesis of 2-acylbenzothiazoles and bibenzo[b][1,4]thiazines from aryl methyl ketones and disulfanediyldianilines

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Chinese Chemical Letters 2021年第11期32卷 3544-3547页

作者： Yuquan Qi xiaoyu gu Xianqiang Huang guodong Shen Bingchuan Yang Qjngpeng He Zechun Xue Mengcheng Du Lilong Shi Bing Yu Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry&Chemical EngineeringLiaocheng UniversityLiaocheng 252059China Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001 China National Rubber Additive Engineering Technology Center Liaocheng 252059China

A condition-controlled strategy for selectively synthesis of 2-acylbenzothiazoles and bibenzo[b][1,4]thiazines from aryl methyl ketones and disulfanediyldianilines was realized using I_(2)/DMSO or I_(2)/MeCN systems,*** desired products were synthesized in only 15 min with moderate to excellent yields(50%-90%)under microwave-assisted,metal-free *** strategy provides a great advantage for selective synthetic applications in the efficient synthesis of benzothiazoles and bibenzothiazines heterocycle compounds.

关键词： Selective synthesis Metal-free Microwave-assisted Condition-controlled Heterocycle compounds

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阻燃剂对喷涂聚脲弹性体阻燃性能的影响

聚氨酯工业 2024年第1期39卷 26-29页

作者：刘晓文岳长山谷晓昱张沪伟薛鑫王宝柱青岛市聚脲弹性体重点实验室青岛爱尔家佳新材料股份有限公司山东青岛266100 北京化工大学北京市水性聚合物合成与应用工程技术中心北京100029

选用阻燃剂次磷酸铝(AHP)、石墨(EG)、含磷多元醇按不同用量添加到喷涂聚脲弹性体(PUA)中,采用喷涂制样的方式制备阻燃聚脲,并探究了阻燃剂的种类及用量对聚脲热稳定性能和阻燃性能的影响。结果发现:AHP和EG的引入均能提高PUA的初始热... 详细信息

选用阻燃剂次磷酸铝(AHP)、石墨(EG)、含磷多元醇按不同用量添加到喷涂聚脲弹性体(PUA)中,采用喷涂制样的方式制备阻燃聚脲,并探究了阻燃剂的种类及用量对聚脲热稳定性能和阻燃性能的影响。结果发现:AHP和EG的引入均能提高PUA的初始热分解温度和成炭性,含磷多元醇的引入会降低初始分解温度,对成炭性影响不大;通过石墨与含磷多元醇质量比1∶1复配会降低热释放速率和总释热量,改善成炭性和抑烟效果,LOI值可提高至29.2%,可达到UL94 V-0等级,阻燃性能优异。

关键词：喷涂聚脲次磷酸铝石墨含磷多元醇阻燃性能

A large-scale proteogenomic atlas of pear

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Molecular Plant 2023年第3期16卷 599-615页

作者： Peng Wang Xiao Wu Zebin Shi Shutian Tao Zhe Liu Kaijie Qi Zhihua Xie Xin Qiao Chao gu Hao Yin Mengyu Cheng xiaoyu gu Xueying Liu Chao Tang Peng Cao Shaohang Xu Baojin Zhou Tingting gui Yangyang Bian Juyou Wu Shaoling Zhang Sanya Institute of Nanjing Agricultural University National Key Laboratory of Crop Genetics&Germplasm Enhancement and UtilizationNanjing Agricultural UniversityNanjing 210095China institute of Horticulture Zhejiang Academy of Agricutural SciencesHangzhou 310021China Deepxomics Co. LtdShenzhen 518000China College of Life Sciences Northwest UniversityXi'an 710127China

Pear is an important fruit tree that is widely distributed around the *** first pear genome map was reported from our laboratory approximately 10 years *** further study global protein expression patterns in pear,we generated pear proteome data based on 24 major *** tissue-resolved profiles provided evidence of the expression of 17953 *** identified 4294 new coding events and improved the pear genome annotation via the proteogenomic strategy based on 18090 peptide spectra with peptide spectrum matches>*** the eight randomly selected new short coding open reading frames that were expressed in the style,four promoted and one inhibited the growth of pear pollen *** on gene coexpression module analysis,we explored the key genes associated with important agronomic traits,such as stone cell formation in *** network regulating the synthesis of lignin,a major component of stone cells,was reconstructed,and receptor-like kinases were implicated as core factors in this regulatory ***,we constructed the online database PearEXP(http://***)to enable access to the pear proteogenomic *** study provides a paradigm for in-depth proteogenomic studies of woody plants.

关键词： pear Pyrus proteome transcriptome proteogenomics genome annotation database

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气悬浮技术在无接触输运领域的研究进展

机械工程学报 2018年第20期54卷 40-51页

作者：钟伟顾小玉黎鑫江苏科技大学机械工程学院江苏科技大学江苏省船海机械先进制造及工艺重点实验室浙江大学流体动力与机电系统国家重点实验室

在半导体、食品和医药等行业的生产制造过程中需要输运清洁和易损的产品。传统的接触式输运方式容易造成产品表面出现刮痕、裂纹,同时还存在静电和金属污染等诸多问题,已无法适应技术发展的需求。无摩擦非接触的方式在满足精度、洁净度... 详细信息

在半导体、食品和医药等行业的生产制造过程中需要输运清洁和易损的产品。传统的接触式输运方式容易造成产品表面出现刮痕、裂纹,同时还存在静电和金属污染等诸多问题,已无法适应技术发展的需求。无摩擦非接触的方式在满足精度、洁净度和可靠性等要求方面具有极大优势。综述了国内外无接触悬浮技术的研究现状,概括对比了不同技术的特点、应用对象和场合、环境限制及复杂性。气悬浮具有清洁无污染、不发热、不生磁且构建简单等优势,是当前无接触输运领域的主流技术。气悬浮从实现方式上可分为负压吸浮和正压悬浮,着重阐述了两种方式的实现原理、研究现状及应用进展。在此基础上,深入分析了完全无接触气浮输运的实现方式、研究现状及存在的问题,并进一步指出无接触气浮输运技术的发展趋势,以期推动我国在相关领域的产业升级。

关键词：无接触气悬浮气膜输运黏性牵引

高压下Py-FeO_(2)、Py-FeOOH和ε-FeOOH晶体结构与弹性特征的第一性原理研究

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高压物理学报 2022年第1期36卷 66-76页

作者：顾小雨刘雷中国地震局地震预测研究所高压物理与地震科技联合实验室北京100089

Py-FeO_(2)、Py-FeOOH和ε-FeOOH是地幔及核幔边界的重要成分,其在高温高压下的物性演化特征对了解地幔物质组成和结构及动力学过程有重要意义,为此利用第一性原理方法计算了0~350 GPa条件下Py-FeO_(2)和Py-FeOOH以及0~170 GPa条件下ε-... 详细信息

Py-FeO_(2)、Py-FeOOH和ε-FeOOH是地幔及核幔边界的重要成分,其在高温高压下的物性演化特征对了解地幔物质组成和结构及动力学过程有重要意义,为此利用第一性原理方法计算了0~350 GPa条件下Py-FeO_(2)和Py-FeOOH以及0~170 GPa条件下ε-FeOOH的晶体结构与弹性性质。Py-FeO_(2)和Py-FeOOH的晶格常数随压强的增加呈逐渐减小趋势,而ε-FeOOH的晶格常数随压强增加而减小,其中c轴更容易被压缩。Py-FeO_(2)、Py-FeOOH和ε-FeOOH的晶胞密度随压强增加而增大,按照密度由大到小依次为Py-FeO_(2)、Py-FeOOH、ε-FeOOH。3相的体积模量随压强的增加线性增加,Py-FeO_(2)和Py-FeOOH的剪切模量随压强的增加线性增加。对比体积模量可知,Py-FeO_(2)的体积模量最高,Py-FeOOH和ε-FeOOH的体积模量在高压下几乎一致;而Py-FeO_(2)的剪切模量最大,ε-FeOOH的剪切模量最小。Py-FeO_(2)、Py-FeOOH和ε-FeOOH的压缩波速随压强的增加而增加,Py-FeO_(2)的剪切波速随压强的增加而增加。Py-FeOOH的剪切波速在0~2000 km深度范围内随深度增加而减小,在2000~6000 km深度范围内变化较小(在5.8~6.0 km/s之间);ε-FeOOH的剪切波速在33 GPa(约900 km深度)发生突变。3相中ε-FeOOH的波速最低,而Py-FeO_(2)的波速最高。综合计算结果表明,Py-FeO_(2)和Py-FeOOH具有高密度、低波速的特点,与地幔超低速区的性质一致。Py-FeO_(2)和Py-FeOOH在形成之后可能富集下沉到核幔边界,成为超低速区的来源。ε-FeOOH在超过33 GPa压强条件下发生的氢键对称化给ε-FeOOH的结构带来显著变化,同时氢键对称化会影响原子间相互作用,进而影响ε-FeOOH的弹性性质以及地震波速。

关键词： ε-FeOOH Py-FeOOH Py-FeO_(2) 晶格结构弹性特征第一性原理计算

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A high-order target phase approach for the station-keeping of periodic orbits

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Astrodynamics 2024年第1期8卷 61-75页

作者： xiaoyu Fu Nicola Baresi Roberto Armellin Surrey Space Centre University of SurreyGuildfordGU27XHUK Te PūnahaĀtea-Auckland Space Institute University of AucklandAuckland1010New Zealand

A novel high-order target phase approach(TPhA)for the station-keeping of periodic orbits is proposed in this *** key elements of the TPhA method,the phase-angle Poincare map and high-order maneuver map,are constructed using differential algebra(DA)techniques to determine station-keeping epochs and calculate correction maneuvers.A stochastic optimization framework tailored for the TPhA-based station-keeping process is leveraged to search for fuel-optimal and error-robust TPhA ***-satellite orbits(QSOs)around Phobos are investigated to demonstrate the efficacy of TPhA in mutli-fidelity dynamical *** Carlo simulations demonstrated that the baseline QSO of JAXA’s Martian Moons eXploration(MMX)mission could be maintained with a monthly maneuver budget of approximately 1 m/s.

关键词： target phase approach(TPhA) station-keeping Poincarémap differential algebra(DA) quasi-satellite orbit(QSO)

Application Prospects of Shenhua Industrial Boilers

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Application Prospects of Shenhua Industrial Boilers

Nickel-iron in the second coordination shell boost single-atomicsite iridium catalysts for high-performance urea electrooxidation

中美工业锅炉先进技术研讨会

作者： Chen Huaizhen gu xiaoyu Cui Fenghai Shenhua Coal Trading Co.

The paper introduces both the application of industrial boilers and the relevant requirements to industrial boilers in China and sets forth the advantage of Shenhua coal in terms of resources, product

关键词： Shenhua Coal Industrial Boilers Application Prospects

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Nano Research 2024年第5期17卷 3919-3926页

作者： xiaoyu Chen Jiawei Wan Jing Chai Liang Zhang Fang Zhang Qinghua Zhang Lin gu Lirong Zheng Ranbo Yu Department of Physical Chemistry School of Metallurgical and Ecological EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key Laboratory of Biochemical Engineering Key Laboratory of Biopharmaceutical Preparation and DeliveryChinese Academy of SciencesInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Center for Combustion Energy School of Vehicle and MobilityState Key Laboratory of Intelligent Green Vehicle and MobilityTsinghua UniversityBeijing 100084China Analysis and Testing Center Beijing Institute of TechnologyBeijing 100081China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Beijing National Center for Electron Microscopy and Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Single-atom catalysts(SACs)with high catalytic activity as well as great stability are demonstrating great promotion in electrocatalytic energy conversion,which is also a big challenge to ***,we proposed a facile synthetic strategy to construct nickel-iron bimetallic hydroxide nanoribbon stabilized single-atom iridium catalysts(Ir-NiFe-OH),where the nickel-iron hydroxide nanoribbon not only can serve as good electronic conductor,but also can well stabilize and fully expose single-atom *** as catalyst for urea oxidation reaction(UOR),it exhibited excellent UOR performance that it only needed a low operated potential of 1.38 V to achieve the current density of 100 mA·cm^(-2).In-situ Fourier transform infrared spectroscopy,X-ray absorption spectrum,and density functional theory calculations proved that Ir species are active centers and the existence of both Ni and Fe in the local structure of Ir atom can optimize the d-band center of Ir species,promoting the adsorption of intermediates and desorption of products for *** hydrogen evolution reaction(HER)/UOR electrocatalytic cell demanded voltages of 1.46 and 1.50 V to achieve 50 and 100 mA·cm^(-2),respectively,which demonstrated a higher activity and better stability than those of conventional *** work opens a new avenue to develop catalysts for UORs with boosted activity and stability.

关键词： single-atom iridium coordinate structure nanoribbon urea electrooxidation

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两亲性双硒聚合物的制备及其聚集体形成

化学学报 2013年第8期71卷 1136-1140页

作者：顾晓瑜王朝阳童真华南理工大学材料科学研究所广州510640

由于Se—Se键相对活泼,对外部氧化和还原环境敏感,双硒聚合物在药物控释系统有广泛的应用.采用双硒二醇,异佛尔酮二异氰酸酯和低分子壳聚糖为原料制备出了两亲性的双硒聚合物.这种共聚物能够在水中发生自组装现象,形成稳定的以PU为核,... 详细信息

由于Se—Se键相对活泼,对外部氧化和还原环境敏感,双硒聚合物在药物控释系统有广泛的应用.采用双硒二醇,异佛尔酮二异氰酸酯和低分子壳聚糖为原料制备出了两亲性的双硒聚合物.这种共聚物能够在水中发生自组装现象,形成稳定的以PU为核,壳聚糖为壳的球形纳米聚集体,粒径约为130 nm.并探索了该聚集体在氧化还原条件下的响应性,发现不管在弱氧化还是弱还原环境下,这种双硒聚合物都能发生Se—Se键断裂,使得装载在聚集体中的正电荷药物盐酸阿霉素达到控制释放的效果.

关键词：双硒两亲性氧化还原盐酸阿霉素释放