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Measurement of the Mie-Grüneisen equation of state for polyimide

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Chinese Science Bulletin 2013年第6期58卷 585-588页

作者： chen hua TANG WenHui RAN XianWen ZHANG MingJian XU ZhiHong Institute of Engineering Physics College of ScienceNational University of Defense Technology School of Physics and Science Technology Southwest Jiaotong University

An equation of state(EOS) is a thermodynamic equation describing the state of matter under a given set of physical conditions,and the Mie-Grüneisen EOS is a widely used EOS for solid *** is a typical complex high-molecular polymer of imide monomers which is widely used in the manufacture of parts for aerospace technology and for fabricating the inertial fusion energy shells(IFE).When a spacecraft collides with a meteoroids(or orbital debris) or the IFE shells are radiated by high power laser,the polyimide used in the equipment is in high pressure *** order to study the safety of the spacecraft and IFE shells,the EOS of polyimide should be *** our research,the three key parameters of the Mie-Grüneisen EOS based on the shock adiabat for polyimide have been determined with two-stage light-gas gun experiments,*** bulk speed of sound of polyimide is determined as 2.62±0.22 km/s,the linear Hugoniot slope coefficient is determined as 1.25±0.063,and the Grüneisen parameter at initial state is determined as 1.53±*** Mie-Grüneisen EOS for polyimide is finally obtained,and the parameter values are proved reliable via the comparison of Grüneisen parameter value calculated from two different theoretical models using the experimental data.

关键词：聚酰亚胺状态方程测量航空航天技术 EOS 冲击绝热线二级轻气炮物理条件

Hydroxyapatite nanoparticles drive the potency of Toll-like receptor 9 agonist for amplified innate and adaptive immune response

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Nano Research 2022年第10期15卷 9286-9297页

作者： Qin Zeng Ruiqi Wang Yuchen hua Hongfeng Wu Xuening chen You-cai Xiao Qiang Ao Xiangdong Zhu Xingdong Zhang National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610064China NMPA Key Laboratory for Quality Research and Control of Tissue Regenerative Biomaterials&Institute of Regulatory Science for Medical Devices&NMPA Research Base of Regulatory Science for Medical Devices Sichuan UniversityChengdu 610064China College of Biomedical Engineering Sichuan UniversityChengdu 610064China Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province Sichuan UniversityChengdu 610041China

The potency of Toll-like receptor 9(TLR9)agonist to drive innate immune response was limited due to immune suppression or tolerance during TLR9 signaling activation in immune *** we addressed this problem by introducing hydroxyapatite nanoparticles(HANPs)to CpG ODN(CpG),a TLR9 *** study revealed that HANPs concentration and durationdependently reprogramed the immune response by enhancing the secretion of immunostimulatory cytokines(tumor necrosis factorα(TNFα)or IL-6)while reducing the production of immunosuppressive cytokine(IL-10)in macrophages in response to ***,the enhanced immune response benefited from increased intracellular Ca2+in macrophage by the addition of ***,we found exposure to HANPs impacted the mitochondrial function of macrophages in support of the synthesis of adenosine triphosphate(ATP),the production of nicotinamide adenine dinucleotide(NAD),and reactive oxygen species(ROS)in the presence or absence of *** vaccinated mice model,only one vaccination with a mixture of CpG,HANPs,and OVA,a model antigen,allowed the development of a long-lasting balanced humoral immunity in mice without any histopathological change in the local injection ***,this study revealed that HANPs could modulate the intracellular calcium level,mitochondrial function,and immune response in immune cells,and suggested a potential combination adjuvant of HANPs and TLR9 agonist for vaccine development.

关键词： hydroxyapatite nanoparticles Toll-like receptor 9 intracellular calcium mitochondrial function adaptive immune response

Functional catalysts for polysulfide conversion in Li-S batteries:from micro/nanoscale to single atom

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Rare Metals 2022年第4期41卷 1080-1100页

作者： Wei-Ming Zhao Jia-Dong Shen Xi-Jun Xu Wei-Xin He Li Liu Zhong-hua chen Jun Liu School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials South China University of TechnologyGuangzhou 510641China Shenzhen FBTech Electronics Ltd Shenzhen 518116China

Lithium-sulfur(Li-S) batteries have the advantages of low-cost and ultra-high energy density(2600 Wh·kg;),which have attracted considerable ***,the practical application of Li-S batteries still suffers various intractable problems,such as low electrical conductivity,significant volume expansion,and the shuttle effect of sulfur *** to now,many tremendous efforts and significant progress have been devoted to settle these *** of the most effective strategies is that introducing metal-based compounds(e.g.,metal oxides,-sulfides,-nitrides,carbides,-phosphate,single-metal compounds) to enhance the electrochemical performance of S cathode benefiting from superior adsorption/catalytic ability toward Li;S;(n=1,2,4,8).In this review,we summarized the recent advances in the application of micro/nanoscale catalysts in Li-S system and highlighted the catalytic effect of single-atom ***,the challenges and the future research prospects of single-atom catalysts were discussed.

关键词： Li–S batteries High energy density Micro/nanoscale catalysts Single-atom catalysts

One-dimensional perovskite-based Li-ion battery anodes with high capacity and cycling stability

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Journal of Energy Chemistry 2022年第9期31卷 73-80,I0003页

作者： hua Kong Jiafeng Wu Ying Han Yu Zhang Ning Zhou Qi chen Wentao Sun huanping Zhou Lian-Mao Peng Key Laboratory for the Physics and Chemistry of Nanodevices School of ElectronicsPeking UniversityBeijing 100871China School of Materials Science and Engineering Peking UniversityBeijing 100871China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Perovskite,widely used in solar cells,has also been proven to be potential candidate for effective energy storage *** progress indicates the promise of perovskite for battery applications,however,the specific capacity of the resulting lithium-ion batteries must be further ***,by adjusting the dimensionality of perovskite,we fabricated high-performing one-dimensional hybrid perovskite C_(4)H_(20)N_(4)PbBr_(6) based lithium-ion batteries,with the first specific capacity as high as 1632.8 mAh g^(-1)and a stable specific capacity of 598.0 mAh g^(-1)after 50 cycles under the condition of the constant current density of 150 mA g^(-1).The stable specific capacity is 2.36 times higher than that of the three-dimensional perovskite CH_(3)NH_(3)PbBr_(3)(253.2 mAh g^(-1)),and 1.6 times higher than that of the commercialized graphite electrode(372 mAh g^(-1)).The structure difference and the associated ion diffusivity are revealed to substantially affect the specific capacity of the perovskite-based lithium-ion *** study opens up new directions for the applications of hybrid perovskites in energy storage devices.

关键词： Li-ion battery One-dimensional perovskite materials

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产前诊断18p四体综合征一例

海南医学 2024年第14期35卷 2086-2088页

作者：贾若李静李妍柳爱华李晨阳沈阳市妇幼保健院遗传科辽宁沈阳110014

18p四体综合征(tetrasomy 18 syndrome)是一种罕见的染色体疾病,大约每18万活产婴儿中有1例出现。本病例经扩展性NIPT检测提示18号染色体非整倍体高风险(Z=4.75),经羊水细胞染色体核型分析和全基因组拷贝数变异(CNVs)分析后诊断为18p四... 详细信息

18p四体综合征(tetrasomy 18 syndrome)是一种罕见的染色体疾病,大约每18万活产婴儿中有1例出现。本病例经扩展性NIPT检测提示18号染色体非整倍体高风险(Z=4.75),经羊水细胞染色体核型分析和全基因组拷贝数变异(CNVs)分析后诊断为18p四体综合征。

关键词： 18p四体综合征全基因组拷贝数变异扩展性无创产前检测病例报告

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超声波裁切参数对胎面裁切质量影响的研究

橡胶科技 2024年第8期22卷 456-459页

作者：张华陈军丽于卫远李少武夏晓楠三角轮胎股份有限公司山东威海264200

研究超声波裁刀振幅、低速裁切速度和低速裁切宽度等对不同胶料、不同厚度胎面裁切质量的影响。结果表明:裁刀振幅和低速裁切速度对不同胶料胎面裁切表面平整度影响不同;裁刀振幅过大,胶料生热高,导致气泡增多;低速裁切速度过快易导致... 详细信息

研究超声波裁刀振幅、低速裁切速度和低速裁切宽度等对不同胶料、不同厚度胎面裁切质量的影响。结果表明:裁刀振幅和低速裁切速度对不同胶料胎面裁切表面平整度影响不同;裁刀振幅过大,胶料生热高,导致气泡增多;低速裁切速度过快易导致侧翼卷边,低速裁切速度过慢易导致热量聚集产生气泡与胶末;低速裁切宽度越大,裁刀与胶料接触时间越长,胶料生热高,导致气泡增多。

关键词：轮胎胎面超声波裁刀裁切质量

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Controllable construction of yolk–shell Sn–Co@void@C and its advantages in Na-ion storage

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Rare Metals 2021年第9期40卷 2392-2401页

作者： Shuang Liu Xin-Ze Li Bin huang Jian-Wen Yang Quan-Qi chen Yan-Wei Li Shun-hua Xiao Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials College of Chemistry and BioengineeringGuilin University of TechnologyGuilin 541004China

In the family of anodes for sodium-ion batteries,alloy-type anodes possess higher theoretical specific capacity than carbon anodes. The theoretical specific capacity of metallic Sn is 847 mAh·g^(-1). However, the tinbased material undergoes a large volume expansion during the sodium-ion intercalation process, which leads to the crack and pulverization of the electrode, consequently resulting in a significant capacity loss. In this paper, a yolk–shell-structured Sn–Co@void@C composite composed of a Sn–Co alloy core, a carbon shell and void space between the core and shell is designed and *** with the carbon-encapsulated SnCo without void space(Sn–Co@C) and carbon-encapsulated pure Sn core shell with void space(Sn@void@C), this composite exhibits improved reversibility, cyclic performance and rate capability. This work highlights the important roles of Co in the alloy and the void space between the core and the shell. The former can not only buffer the volume expansion of Sn, but also act as an electrical conductor. The void space can further tolerate the volume expansion of the Sn–Co core. Owing to this unique microstructure, the Sn–Co@void@C composite shows an initial reversible capacity of 591.4 mAh·g^(-1), at a current density of50 mA·g^(-1). After 100 charge/discharge cycles at100 mA·g^(-1), the composite still delivers 330 mAh·g^(-1).

关键词： Nanocomposites Yolk-shell structure Tin-based alloys Anodes Sodium-ion batteries

正中弓状韧带压迫综合征伴中结肠动脉瘤破裂致腹膜后血肿1例

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中国医学影像技术 2024年第9期40卷 1455-1455页

作者：陈观木王贤明华先平郑国良中山市小榄人民医院超声影像科广东中山528415 佛山市第五人民医院功能检查科广东佛山528211 中山市小榄人民医院心血管内科广东中山528415 中山市小榄人民医院CT室广东中山528415

患者男,54岁,突发左中腹痛1天;间断腹痛10年,经多次胃镜及腹部超声、CT检查均未见明显异常;高血压史20年,无腹部手术、外伤史。查体:左中腹压痛(+),可疑移动性浊音。实验室检查:血红蛋白100 g/L。

关键词：正中弓状韧带压迫综合征动脉瘤破裂超声检查体层摄影术,X线计算机

复合益生菌对中华田园犬营养物质表观消化率、血清生化指标和粪便菌群的影响

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饲料工业 2024年第18期45卷 126-132页

作者：滑志民杨守凤陈斌姜博文段卫帅刘婷婷张洪才上海交通大学农业与生物学院上海200240 上海农林职业技术学院上海201699 上海海洋大学食品学院上海230306 深圳豆柴宠物用品有限公司广东深圳518000 奥特奇生物制品(中国)有限公司天津301599

试验旨在探究犬粮中添加复合益生菌对营养物质表观消化率、血清生化指标和粪便菌群的影响。试验选取18只中华田园犬,分为3组,每组6只,分别为:基础饲粮组,0.3%复合益生菌组(基础饲粮+0.3%复合益生菌),0.6%复合益生菌组(基础饲粮+0.6%复... 详细信息

试验旨在探究犬粮中添加复合益生菌对营养物质表观消化率、血清生化指标和粪便菌群的影响。试验选取18只中华田园犬,分为3组,每组6只,分别为:基础饲粮组,0.3%复合益生菌组(基础饲粮+0.3%复合益生菌),0.6%复合益生菌组(基础饲粮+0.6%复合益生菌)。饲喂63 d后,测定犬日采食量、营养物质消化率、血清生化指标和粪便菌群组成。结果表明:与基础饲粮组相比,0.3%和0.6%复合益生菌组显著提高了犬干物质和粗蛋白表观消化率(P<0.05),并且0.6%复合益生菌组最高。与基础饲粮组相比,0.3%和0.6%复合益生菌组在第63天犬血液中白细胞总数显著降低(P<0.05),且0.6%复合益生菌组降低更为明显;0.6%复合益生菌组犬粪便菌群丰度及多样性大于0.3%复合益生菌组和基础饲粮组。因此,在犬饲粮中添加0.6%的复合益生菌有利于调节犬肠道菌群平衡,减轻犬的炎症。

关键词：复合益生菌犬表观消化率血清生化指标粪便菌群