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三酰甘油-葡萄糖指数与2型糖尿病动脉粥样硬化的相关性

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中国临床研究 2024年第3期37卷 397-400页

作者：徐海波宰国田朱昱霖王翠王坤林南通大学杏林学院附属南京江北医院内分泌科江苏南京210048 江苏省省级机关医院内分泌科江苏南京210024

目的探讨三酰甘油-葡萄糖(TyG)指数在临床中的应用及其与2型糖尿病(T2DM)动脉粥样硬化的相关性。方法从2020年1月至2022年12月南京江北医院住院及体检人群中筛选出T2DM患者499例,将所有研究对象按照有无合并动脉粥样硬化斑块进行分组... 详细信息

目的探讨三酰甘油-葡萄糖(TyG)指数在临床中的应用及其与2型糖尿病(T2DM)动脉粥样硬化的相关性。方法从2020年1月至2022年12月南京江北医院住院及体检人群中筛选出T2DM患者499例,将所有研究对象按照有无合并动脉粥样硬化斑块进行分组,其中T2DM合并斑块组共249例,T2DM无斑块组共250例。对入选人员进行病史采集、体格检查、血清生化指标等检查,计算TyG,并对TyG指数与常见T2DM动脉粥样硬化因素的相关性进行分析。结果 T2DM无斑块组年龄、收缩压(SBP)、三酰甘油(TG)、总胆固醇(TC)、空腹血糖(FBG)、糖化血红蛋白(HbA1c)、载脂蛋白A均低于T2DM合并斑块组,舒张压(DBP)高于T2DM合并斑块组(P<0.05)。T2DM合并斑块组TyG指数高于T2DM无斑块组,差异有统计学意义(11.52±0.37 vs 9.34±0.48,t=56.803,P<0.01)。TyG指数与年龄、DBP、TG、TC、低密度脂蛋白胆固醇(LDL-C)、尿酸(UA)和HbA1c呈正相关,与高密度脂蛋白胆固醇(HDL-C)、空腹C肽呈负相关(P<0.05)。TyG指数预测T2DM发生动脉粥样硬化的ROC曲线下面积为0.611,最佳临界值为10.21,对应的敏感度为84.8%,特异度为62.2%。结论 TyG指数与T2DM动脉粥样硬化的多种危险因素密切相关,TyG指数结合动脉粥样硬化危险因素能更全面评估T2DM患者动脉粥样硬化发生的风险。

关键词：三酰甘油-葡萄糖指数 2型糖尿病动脉粥样硬化葡萄糖钳夹技术

Magnetic transitions in graphene derivatives

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Nano Research 2014年第10期7卷 1507-1518页

作者： Pengzhan Sun kunlin wang Jinquan Wei Minlin Zhong Dehai Wu Hongwei Zhu School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Materials Processing Technology of MOE Tsinghua University Beijing 100084 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China

The magnetic transitions in graphene oxide （GO） have been investigated experimentally. Micron-sized GO flakes exhibit dominant diamagnetism accompanied by weak ferromagnetism at room temperature. However, when the lateral dimensions of GO flakes are reduced from micron-size to nano-size, a clear transition from dominant diamagnetism to ferromagnetism is observed. After reducing the GO chemically or thermally, the dominant magnetic properties are not altered markedly except for the gradual enhancement of ferromagnetic components. In contrast, at 2 K, significant paramagnetism is present in both the micron-sized and nano-sized GO sheets. The effects of different functional groups on magnetic transitions in graphene derivatives have been further investigated using on hydroxyl-, carboxyl-, amino- and thiol- functionalized graphene. The results reveal that significant diamagnetism with weak ferromagnetism is present at room temperature in all of these functionalized graphene derivatives and the ability of different functional groups to introduce magnetic moments follows the order -SH 〉 --OH 〉 -COOH, -NH2. Notably, at 5 K, diamagnetism, paramagnetism and ferromagnetism coexist in thiol-, hydroxyl- and carboxyl-functionalized graphene, while amino-graphene exhibits dominant paramagnetism, analogous to the low-temperature magnetism in GO. These results indicate that diamagnetism, paramagnetism and ferromagnetism can coexist in graphene derivatives and magnetic transitions among the three states can be achieved which depend on edge states, vacancies, chemical doping and the attached functional groups. The results obtained may help settle the current controversy about the magnetism of graphene-related materials.

关键词： graphene derivatives defects functionalization magnetic transition

Interconnected graphene/polymer micro-tube piping composites for liquid sensing

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Nano Research 2014年第6期7卷 869-876页

作者： Tingting Yang Hongze Zhang Yan wang Xiao Li kunlin wang Jinquan Wei Dehai Wu Zhihong Li Hongwei Zhu School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory of Materials Processing Technology of MOE Tsinghua University 8eijing 100084 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of Microelectronics Peking University Beijing 100871 China Department of Physics and Nanoscience and Nanotechnology Laboratory Institute for Advanced Study Nanchang University Nanchang 330031 China Department of Mechanical Engineering Tsinghua University Beijing 100084 China

Detection and analysis of volatile organic compounds （VOCs） as pollutants in the atmosphere and liquids are of great significance because of the detrimental effects of VOCs. A polymer-coated graphene micro-tube piping （GMP） structure with a cross-linked and interconnected channel network was synthesized for liquid sensing. By virtue of their unique cross-linked and interconnected channel network configuration, polycrystalline conformation, and the support of a polymer layer, the resistivity of the 3D hollow micro-tubing GMPs was sensitive to strain, ensuring high sensitivity of the liquid sensor （R/Ro of -4 × 10^3% for pure acetone and R/Ro of -105% for 0.01 wt.% acetone solution）. Due to the capillary force, the interfaces of the 3D structures can speed up the penetration of solvents into the polymer, thus promote distinct selectivity within seconds and significantly decrease the response time. Owing to their good selectivity, high sensitivity, rapid response and flexibility, and the ease of use of the sensors and the simplicity of the fabrication processes, the GMP/polymer composites should be a good candidate for liquid sensing.

关键词： liquid sensing graphene micro-tube piping flexible devices high sensitivity

内脏脂肪面积与2型糖尿病患者颈动脉粥样硬化斑块的相关性

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中国临床研究 2024年第7期37卷 1070-1074页

作者：徐海波宰国田唐伟王坤林南通大学杏林学院附属南京江北医院内分泌科江苏南京210048 南京医科大学附属老年医院内分泌科江苏南京210024

目的探讨内脏脂肪面积(VFA)对2型糖尿病(T2DM)患者合并颈动脉粥样硬化斑块的影响。方法筛选2018年8月至2023年8月期间南京医科大学附属老年医院内分泌科纳入国家标准化代谢性疾病管理中心数据库的T2DM者683例,对研究对象进行病史、体格... 详细信息

目的探讨内脏脂肪面积(VFA)对2型糖尿病(T2DM)患者合并颈动脉粥样硬化斑块的影响。方法筛选2018年8月至2023年8月期间南京医科大学附属老年医院内分泌科纳入国家标准化代谢性疾病管理中心数据库的T2DM者683例,对研究对象进行病史、体格检查、血清生化指标以及VFA等资料的收集,按照有无合并颈动脉粥样硬化斑块分为T2DM合并斑块组(n=342)及T2DM无斑块组(n=341),并进行相关统计学分析。结果年龄、身体质量指数(BMI)、腰围、舒张压(DBP)、总胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、腹部皮下脂肪面积(SFA)及VFA等水平在两组间比较差异均有统计学意义(P<0.05)。Logistic多元逐步回归分析结果显示,年龄大(OR=1.070,95%CI:1.050~1.091)、VFA水平高(OR=1.020,95%CI:1.012~1.028)是T2DM患者颈动脉粥样斑块形成的危险因素(P<0.01)。VFA及BMI、腰围、腹部SFA对T2DM动脉粥样硬化预测的曲线下面积(AUC)分别为0.673、0.590、0.621和0.601,以VFA最高。当VFA临界值为85 cm^(2)时,其敏感度及特异度分别为95.3%、61.6%。结论年龄和VFA是T2DM患者动脉粥样硬化斑块形成的独立影响因素,VFA作为新型的肥胖评估指标能够更好的预测并评估T2DM患者动脉粥样硬化斑块发生的风险。

关键词： 2型糖尿病动脉粥样硬化肥胖内脏脂肪面积腹部皮下脂肪面积身体质量指数腰围

Microwave absorbing properties and magnetic properties of different carbon nanotubes

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Science China(Technological Sciences) 2009年第1期52卷 227-231页

作者： XuChun Gui kunlin wang JinQuan Wei RuiTao Lü QinKe Shu Yi Jia Chen wang HongWei Zhu DeHai Wu Key Laboratory for Advanced Manufacturing by Materials Processing Technology Department of Mechanical Engineering Tsinghua University Beijing 100084 China Department of Materials Science and Engineering Tsinghua University Beijing 100084 China

The microwave absorbing properties and magnetic properties of as-grown Fe-filled carbon nanotubes (CNTs), annealed Fe-filled CNTs, and multi-walled CNTs were studied. Vibrating sample magnetometer results showed that the annealed Fe-filled CNTs have the weakest coercivity and strongest saturation magnetization among the three types CNTs, due to the presence of more ferromagnetic α-Fe nanowires. After annealing, the values increased to 291.0 Oe and 28.0 emu/g and the samples showed excellent microwave absorbing properties. The reflection loss was over 5 dB between 11.6 GHz and 18 GHz with a maximum value of 10.8 dB for annealed Fe-filled CNTs (1.1 wt%)/epoxy composite.

关键词： carbon nanotubes microwave absorbing properties magnetic properties

Ultra-sensitive graphene strain sensor for sound signal acquisition and recognition

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Nano Research 2015年第5期8卷 1627-1636页

作者： Yan wang Tingting Yang Junchao Lao Rujing Zhang Yangyang Zhang Miao Zhu Xiao Li Xiaobei Zang kunlin wang Wenjian YU Hu Jin Li wang Hongwei Zhu Department of Physics and Institute for Advanced Study Nanchang University Nanchang 330031 China Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine Processing Key Laboratory ot Materials Processing Technology of MOE Tsinghua University Beijing 100084 China Department of ComputerScience and Technology Tsinghua University Beijing 100084 China 2D Carbon Graphene Material Co. Ltd. Changzhou 213149 China

A wearable and high-precision sensor for sound signal acquisition and recognition was fabricated from thin films of specially designed graphene woven fabrics （GWFs）. Upon being stretched, a high density of random cracks appears in the network, which decreases the current pathways, thereby increasing the resistance. Therefore, the film could act as a strain sensor on the human throat in order to measure one＇s speech through muscle movement, regardless of whether or not a sound is produced. The ultra-high sensitivity allows for the realization of rapid and low-frequency speech sampling by extracting the signature characteristics of sound waves. In this study, representative signals of 26 English letters, typical Chinese characters and tones, and even phrases and sentences were tested, revealing obvious and characteristic changes in resistance. Furthermore, resistance changes of the graphene sensor responded perfectly with pre-recorded sounds. By combining artificial intelligence with digital signal processing, we expect that, in the future, this graphene sensor will be able to successfully negotiate complex acoustic systems and large quantities of audio data.

关键词： graphene strain sensors sound detectors high sensitivity

Spread of double-walled carbon nanotube membrane

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Chinese Science Bulletin 2007年第7期52卷 997-1000页

作者： JIA Yi WEI JinQuan SHU QinKe CHANG JianGuo wang kunlin wang ZhiCheng LUO JianBin LIU WenJin ZHENG MingXin WU DeHait Key Laboratory for Advanced Materials Processing Technology Ministry of Education of China Department of Mechanical Engineering Tsinghua University Beijing 100084 China

A single-layer double-walled carbon nanotube (DWNT) membrane, with 100 cm2 in area, 50 nm in thickness, was spread by adding a few drops of ethanol (or acetone) on the purified DWNTs. Compared with acetone, ethanol is more efficient in spreading DWNT films. The spreading rate of DWNT mem-brane increases with the ethanol concentration, and it also first increases with temperature (below 60℃), then decreases as the temperature rises to above 60℃.

关键词：双壁碳纳米管薄膜扩展方法乙醇浓度

Fabrication of large area hexagonal boron nitride thin films for bendable capacitors

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Nano Research 2013年第8期6卷 602-610页

作者： Ning Guo Jinquan Wei Yi Jia Huanhuan Sun Yuhang wang Kehan Zhao Xiaolan Shi Liuwan Zhang Xinming Li Anyuan Cao Hongwei Zhu kunlin wang Dehai Wu Key Lab for Advanced Materials Processing Technology of Education Ministry School of Materials Science and Engineering Tsinghua University Beijing 100084 China Department of Physics Tsinghua University Beijing 100084 China Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China

Highly reliable and bendable dielectrics are desired in flexible or bendable electronic devices for future applications. Hexagonal boron nitride （h-BN） can be used as bendable dielectric due to its wide band gap. Here, we fabricate high quality h-BN films with controllable thickness by a low pressure chemical vapor deposition method. We demonstrate a parallel-plate capacitor using h-BN film as the dielectric. The h-BN capacitors are reliable with a high breakdown field strength of -9.0 MV/cm. Tunneling current across the h-BN film is inversely exponential to the thickness of dielectric, which makes the capacitance drop significantly. The h-BN capacitor shows a best specific capacitance of 6.8 F/cm^2, which is one order of magnitude higher than the calculated value.

关键词： hexagonal boron nitride capacitor breakdown strength tunneling effect

Luminescence of carbon nanotube bulbs

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Chinese Science Bulletin 2007年第1期52卷 113-117页

作者： LI ChuanGang wang kunlin WEI JinQuan WEI BingQing ZHU HongWei wang ZhiCheng LUO JianBin LIU WenJin ZHENG MingXin WU DeHai Department of Mechanical Engineering Tsinghua University Beijing 100084 China Department of Electrical & Computer Engineering and Center for Computation & Technology Louisiana State University Baton Rouge LA 70803 USA

Carbon nanotube (CNT) bulbs made of decimeter-scale double-walled carbon nanotube (DWCNT) strands and films were fabricated and their luminescence properties, including the lighting efficiency, voltage-current relation and thermal stability were investigated. The results show that the DWCNT bulb has a comparable spectrum of visible light with tungsten bulb and its average efficiency is 40% higher than that of a tungsten filament at the same temperature (1400―2300 K). The nanotube filaments show both resistance and thermal stability over a large temperature region. No obvious damage was found for a nanotube bulb illuminating at 2300 K for more than 24 hours in vacuum.

关键词：碳纳米管灯管发光性电子产品