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HTG-四链体对甲基氮杂杯[6]吡啶的构象调控

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化学通报 2018年第9期81卷 828-833页

作者：李敬晨管爱娇向俊锋张恩选李骞齐伟孙红霞唐亚林曲阜师范大学化学与化工学院曲阜273100 中国科学院化学研究所分子动态与稳态结构国家重点实验室北京100190 中国科学院大学北京100049 凯莱英医药集团天津市药物绿色合成技术企业重点实验室天津300457

甲基氮杂杯[n]吡啶(MACPn)是一类柔性、多构象的新型杂杯杂芳烃化合物,溶液状态中对其构象的调控与分离一直是此类化合物研究的难点之一。我们将DNA G-四链体作为功能分子,调控甲基氮杂杯[6]吡啶(MACP6)在溶液态的构象,结果表明,HT序列... 详细信息

甲基氮杂杯[n]吡啶(MACPn)是一类柔性、多构象的新型杂杯杂芳烃化合物,溶液状态中对其构象的调控与分离一直是此类化合物研究的难点之一。我们将DNA G-四链体作为功能分子,调控甲基氮杂杯[6]吡啶(MACP6)在溶液态的构象,结果表明,HT序列在K^+条件下所形成的混合结构的G-四链体可以诱导MACP6的手性构象,而在Na^+条件下所形成的反平行结构不具备此功能。一维核磁共振氢谱、分子对接与碱基突变进一步揭示了HT G-四链体与MACP6以边沿loop为位点的构型匹配作用模式,loop区增长,有利于HT G-四链体对MACP6的调控作用。本研究再次拓展了G-四链体作为氮杂杯吡啶构象调控功能分子的应用。

关键词：甲基氮杂杯[n]吡啶 G-四链体手性诱导构象调控

妊娠期糖尿病孕妇社会支持网络现状及影响因素分析

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中华护理杂志 2024年第6期59卷 685-691页

作者：唐雅琳魏丽丽李倩倩匡国芳岳崇玉张新伟张艳谷如婷吕伯瀚赵雅菲青岛大学护理学院青岛市266000 青岛大学附属医院院长办公室青岛大学附属医院眼科青岛大学附属医院产科青岛大学附属医院心血管内科青岛大学附属医院胸外科青岛大学附属医院重症医学科

目的调查妊娠期糖尿病(gestational diabetes mellitus,GDM)孕妇的社会支持网络现状,并分析其影响因素,为改善GDM孕妇的健康状况提供参考。方法采用便利抽样法,于2022年6月—10月选取青岛市4所三级甲等医院的315例GDM孕妇作为调查对象... 详细信息

目的调查妊娠期糖尿病(gestational diabetes mellitus,GDM)孕妇的社会支持网络现状,并分析其影响因素,为改善GDM孕妇的健康状况提供参考。方法采用便利抽样法,于2022年6月—10月选取青岛市4所三级甲等医院的315例GDM孕妇作为调查对象。采用一般情况调查问卷、姓名生成器问卷、GDM患者自我管理能力问卷进行调查,采用单因素分析及多元线性回归分析探讨GDM孕妇社会支持网络的影响因素。结果回收有效问卷306份。GDM孕妇社会支持网络的结构网络规模为(8.24±1.81)人次,功能网络规模为(11.90±2.39)人次。多元线性回归分析结果显示,自我管理能力、年龄、受教育水平、经济活动参与度是GDM孕妇结构网络的影响因素(P<0.05);居住地、年龄、公益活动参与度是其功能网络的影响因素(P<0.05)。结论GDM孕妇的整体社会支持网络水平处于中等水平,临床护理工作中应重点关注年轻、低学历、居住在农村地区、自我管理水平不足且社会活动参与度低的GDM孕妇的血糖管理情况,同时帮助其提升获取、利用社会支持的能力。

关键词：妊娠期糖尿病孕妇社会网络社会支持影响因素分析产科护理

静电纺PAN/TiO2耐高温纳米材料的制备与性能研究

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国际纺织导报 2020年第10期48卷 32-34,36页

作者：唐亚林姜亚飞周凡倪荣礼张键盐城工学院纺织服装学院中国江苏悦达纺织集团有限公司中国

以钛酸四丁酯和聚丙烯腈(PAN)为原料,采用静电纺丝技术制备纳米纤维膜,经不同的PAN预氧化温度煅烧获得PAN/TiO2复合纳米纤维膜。通过形貌观察,厚度与透气性测试,以及X射线衍射(XRD)与傅里叶变换红外光谱(FT-IR)分析,考察煅烧温度对纤维... 详细信息

以钛酸四丁酯和聚丙烯腈(PAN)为原料,采用静电纺丝技术制备纳米纤维膜,经不同的PAN预氧化温度煅烧获得PAN/TiO2复合纳米纤维膜。通过形貌观察,厚度与透气性测试,以及X射线衍射(XRD)与傅里叶变换红外光谱(FT-IR)分析,考察煅烧温度对纤维膜结构与性能的影响。研究结果表明:在PAN预氧化温度范围内,PAN最终生成了较稳定的芳环结构;煅烧后纳米纤维膜中TiO2的晶相结构为纯的锐钛矿相;随着煅烧温度的升高,纳米纤维膜厚度增大,透气性下降。

关键词：聚丙烯腈(PAN) TiO2 预氧化耐高温滤料静电纺丝纳米纤维

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六盘水马铃薯脱毒种薯繁育现状及对策浅析

耕作与栽培 2021年第4期41卷 82-84页

作者：彭德勇周维群彭雁全刚唐亚林六盘水市农业农村局贵州六盘水553000 钟山区农业农村局贵州六盘水553000

马铃薯是贵州省六盘水市播种面积最大的粮食作物。受农业产业结构调整等政策因素影响,“十二五”时期已建成并初具规模的六盘水市马铃薯种薯繁育体系被严重削弱。在当前国家高度重视粮食安全的大好形势下,重建马铃薯种薯繁育体系工作又... 详细信息

马铃薯是贵州省六盘水市播种面积最大的粮食作物。受农业产业结构调整等政策因素影响,“十二五”时期已建成并初具规模的六盘水市马铃薯种薯繁育体系被严重削弱。在当前国家高度重视粮食安全的大好形势下,重建马铃薯种薯繁育体系工作又提上了六盘水市的重要日程。目前存在政策上、体制上的限制,种薯缺乏市场竞争力,扩繁设施设备陈旧,损坏严重等问题。建议政府高度重视马铃薯种薯繁育工作、统筹种薯繁育科研及生产资源、确保资金投入长期稳定,恢复重建扩繁设施设备和马铃薯种薯繁育体系,为六盘水市粮食安全做好基础性工作。

关键词：马铃薯种薯繁育工作设施设备粮食安全种薯繁育农业产业结构调整六盘水市播种面积

Ti_(3)C_(2)T_(x) MXene/carbon composites for advanced supercapacitors:Synthesis,progress,and perspectives

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Carbon Energy 2024年第2期6卷 113-142页

作者： Yanqing Cai Xinggang Chen Ying Xu yalin Zhang Huijun Liu Hongjuan Zhang Jing tang College of Materials Science and Engineering North China University of Science and TechnologyTangshanChina Hebei Iron and Steel Laboratory North China University of Science and TechnologyTangshanChina Songshan Lake Materials Laboratory DongguanChina Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghaiChina State Key Laboratory of Petroleum Molecular and Process Engineering(SKLPMPE) Sinopec Research Institute of Petroleum Processing Co.Ltd.BeijingChina Institute of Eco-Chongming ShanghaiChina

MXenes are a family of two-dimensional(2D)layered transition metal carbides/nitrides that show promising potential for energy storage applications due to their high-specific surface areas,excellent electron conductivity,good hydrophilicity,and tunable *** various types of MXenes,Ti_(3)C_(2)T_(x) is the most widely studied for use in capacitive energy storage applications,especially in supercapacitors(SCs).However,the stacking and oxidation of MXene sheets inevitably lead to a significant loss of electrochemically active *** overcome such challenges,carbon materials are frequently incorporated into MXenes to enhance their electrochemical *** review introduces the common strategies used for synthesizing Ti_(3)C_(2)T_(x),followed by a comprehensive overview of recent developments in Ti_(3)C_(2)T_(x)/carbon composites as electrode materials for ***_(3)C_(2)T_(x)/carbon composites are categorized based on the dimensions of carbons,including 0D carbon dots,1D carbon nanotubes and fibers,2D graphene,and 3D carbon materials(activated carbon,polymer-derived carbon,etc.).Finally,this review also provides a perspective on developing novel MXenes/carbon composites as electrodes for application in SCs.

关键词： electrochemical performance MXene/carbon composites supercapacitors

Geochemical Characteristics,Genesis of Concealed Cu-rich Ore Body in the Jinchuan Deposit,Northwestern China,and Its Prospecting

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Acta Geologica Sinica(English Edition) 2009年第6期83卷 1085-1100页

作者： GAO yalin tang Zhongli ZHANG Mingjie TIAN Yulong XIAO Lizhong College of Civil Engineering and Mechanies Sciences Lanzhou University Lanzhou 730000 China Jinchuan Nonferrous Metal Corporation Jinchang 737102 China

The Jinchuan deposit is hosted by the olivine-rich ultramafic rock body, which is the thirdlargest magmatic sulfide Ni-Cu deposit in the world currently being exploited. Seeking new relaying resources in the deep and the border of the deposit becomes more and more important. The ore body, ore and geochemistry characteristics of the concealed Cu-rich ore body are researched. Through spatial analysis and comparison with the neighboring II1 main ore body, the mineralization rule of the concealed Cu-rich ore body is summed up. It is also implied that Cu-rich magma may exist between Nirich magma and ore pulp during liquation differentiation in deep-stage chambers, which derives from deep-mantle Hi-MgO basalt magma. It is concluded that the type of ore body has features of both magmatic liquation and late reconstruction action. It has experienced three stages： deep liquation and pulsatory injection of the Cu- and PPGE-rich magma, concentration of tectonic activation, and the later magma hydrothermal superimposition. In addition, the Pb and S isotopes indicate the magma of I6 concealed Cu-rich ore body originates predominantly from mantle; however, it is interfused by minute crust material. Finally, it is inferred that the genesis of the Cu-Ni sulfide deposit is complex and diverse, and the prospect of seeking new deep ore bodies within similar deposits is promising, especially Cu-rich ore bodies.

关键词： Cu-Ni sulfide deposit Cu-rich magma Cu-rich ore body prospecting Jinchuan

A direct measurement method of quantum relaxation time

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National Science Review 2021年第4期8卷 91-99页

作者： Peng Zhang Haoqi tang Chuanchuan Gu Hong Wang Guangfu Luo yalin Lu X.-D.Xiang Department of Materials Science and Engineering & Department of Physics Southern University of Science and Technology Synergetic Innovation Center of Quantum Information and Quantum Physics & Hefei National Laboratory for Physical Sciences at Microscale University of Science and Technology of China Materials Genome Initiative Center and School of Materials Science and Engineering Shanghai Jiao Tong University State Key Laboratory of Green Building Materials China Building Materials Academy Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology

The quantum relaxation time of electrons in condensed matters is an important physical property, but its direct measurement has been elusive for a century. Here, we report a breakthrough that allows direct determination of quantum relaxation time at zero and non-zero frequencies using optical *** dielectric loss function, we connect bound electron effects to the physical parameters of plasma resonance and find an extra term of quantum relaxation time from inelastic scattering between bound electrons and conduction electrons at non-zero frequencies. We demonstrate here that the frequency-dependent inelastic polarization effect of bound electrons is the dominant contribution to quantum relaxation time of conduction electrons at optical frequencies, and the elastic polarization effect of bound electrons also dramatically changes the plasma resonance frequency through effective screening to charge carriers.

关键词： quantum relaxation time plasma resonance dielectric loss function

Generalization of Erdos-Kac theorem

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Frontiers of Mathematics in China 2019年第6期14卷 1303-1316页

作者： yalin SUN Lizhen WU School of Mathematical Sciences East China Normal UniversityShanghai 200241China School of Mathematical Sciences and Statistics Henan UniversityKaifeng 475004China

Let w(n)is the number of distinct prime factors of the natural number n,we consider two cases where l is even and odd natural numbers,and then we prove a more general form of the classical Erdos-Kac theorem.

关键词： Erdos-Kac theorem central limit theorem value distribution

低频振动对超疏水电热除冰方法的增益效果探究

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航空科学技术 2022年第11期33卷 70-75页

作者：魏卓姚井淳石小鑫陈增贵唐亚林吕湘连何洋西北工业大学空天微纳系统教育部重点实验室陕西西安710072

飞机结冰会给飞行安全带来严重损害。针对除冰问题,本文提出了一种超疏水电热低频振动复合式除冰方案。通过热压合工艺制备了电热薄膜,以喷涂方式在薄膜上制备了超疏水表面,并在超疏水电热薄膜的基础上复合低频振动器件,完成了超疏水电... 详细信息

飞机结冰会给飞行安全带来严重损害。针对除冰问题,本文提出了一种超疏水电热低频振动复合式除冰方案。通过热压合工艺制备了电热薄膜,以喷涂方式在薄膜上制备了超疏水表面,并在超疏水电热薄膜的基础上复合低频振动器件,完成了超疏水电热低频振动复合除冰装置的设计制备,同时进行了冰风洞验证试验。结果表明,超疏水电热低频振动复合方法能有效除冰。对试验结果进行了理论分析,认为微小功率的低频振动产生的机械剪切作用是促使冰脱落的主要原因。低频振动的添加对超疏水电热复合除冰方案有显著增益效果,在飞机除冰领域有一定的实际应用潜力。

关键词：飞机除冰超疏水电热低频振动冰风洞

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