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Graphene-encapsulated blackberry-like porous silicon nanospheres prepared by modest magnesiothermic reduction for high-performance lithium-ion battery anode

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Rare Metals 2021年第2期40卷 383-392页

作者： Ben Xiang Wei-Li An Ji-Jiang Fu Shi-Xiong Mei si-Guang Guo Xu-Ming Zhang Biao Gao Paul K.chu The State Key Laboratory of Refractories and Metallurgy Institute of Advanced Materials and NanotechnologyWuhan University of Science and TechnologyWuhan430081China BTR New Material Group Co. Ltd.Shenzhen518106China Department of Physics City University of Hong KongTat Chee AvenueKowloon999077Hong KongChina Department of Materials Science and Engineering City University of Hong KongTat Chee AvenueKowloon999077Hong KongChina Department of Biomedical Engineering City University of Hong KongTat Chee AvenueKowloon999077Hong KongChina

Porous silicon(si)nanostructures have aroused much interest as lithium-ion battery anodes because of the large space to accommodate the volume change in lithiation and delithiation and shorter ion transfer ***,fabrication of porous structures tends to be difficult to control and complex,so,the final electrochemical performance can be ***,a modest magnesiothermic reduction(MMR)reaction is demonstrated to produce blackberry-like porous si nanospheres(PSSs)controllably using magnesium silicide(Mg_(2)si)as Mg source and siO_(2)nanospheres as the *** improved MR method provides good control of the kinetics and heat release compared to the traditional MR(TMR)method using Mg powder as the *** PSSs obtained by MMR reaction has higher structural integrity than that fabricated by *** encapsulation with reduced graphene oxide,the si/C composite exhibits superior cycling stability and rates such as a high reversible capacity of 1034 mAh·g^(-1)at0.5 C(4200 mAh·g^(-1)at 1.0 C)after 1000 cycles,capacity retention of 79.5%,and high rate capacity of 497 mAh·g^(-1)at 2.0 *** strategy offers a new route to fabricate highperformance porous si anodes and can be extended to other materials such as germanium.

关键词： Porous silicon Graphene Anode Magnesiothermic reduction Lithium-ion battery

Positron emission tomography imaging for the assessment of mild traumatic brain injury and chronic traumatic encephalopathy:recent advances in radiotracers

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Neural Regeneration Research 2022年第1期17卷 74-81页

作者： chu-Xin Huang Yan-Hui Li Wei Lu si-Hong Huang Meng-Jun Li Li-Zhi Xiao Jun Liu Department of Radiology the Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina Department of Neurology the Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina PET-CT Center the Second Xiangya Hospital of Central South UniversityChangshaHunan ProvinceChina

A chronic phase following repetitive mild traumatic brain injury can present as chronic traumatic encephalopathy in some cases,which requires a neuropathological examination to make a definitive *** emission tomography(PET)is a molecular imaging modality that has high sensitivity for detecting even very small molecular changes,and can be used to quantitatively measure a range of molecular biological processes in the brain using different radioactive *** changes have also been reported in patients with different forms of traumatic brain injury,especially mild traumatic brain injury and subsequent chronic traumatic ***,PET provides a novel approach for the further evaluation of mild traumatic brain injury at molecular *** this review,we discuss the recent advances in PET imaging with different radiotracers,including radioligands for PET imaging of glucose metabolism,tau,amyloid-beta,γ-aminobutyric acid type A receptors,and neuroinflammation,in the identification of altered neurological *** novel radiolabeled ligands are likely to have widespread clinical application,and may be helpful for the treatment of mild traumatic brain ***,PET functional imaging with different ligands can be used in the future to perform largescale and sequential studies exploring the time-dependent changes that occur in mild traumatic brain injury.

关键词： amyloid-β chronic traumatic encephalopathy flumazenil fluorodeoxyglucose mild traumatic brain injury positron emission tomography tau protein traumatic brain injury

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自救式加压发热止血带的研制

医疗卫生装备 2024年第3期45卷 111-114页

作者：肖楚兰李富强卢思萍李峻辉联勤保障部队第920医院中医科昆明650100

目的:设计一款适用于高原寒区肢体创伤后大出血的自救式加压发热止血带,以降低高原寒区肢体创伤后大出血伤员的致死率和致残率。方法:止血带整体结构为长条形,由产气发热装置、可充气袖带、减压装置、微型计时器4个部分组成。产气发热... 详细信息

目的:设计一款适用于高原寒区肢体创伤后大出血的自救式加压发热止血带,以降低高原寒区肢体创伤后大出血伤员的致死率和致残率。方法:止血带整体结构为长条形,由产气发热装置、可充气袖带、减压装置、微型计时器4个部分组成。产气发热装置主要由内缸和外缸组成,二者采用螺钉固定;可充气式袖带包括上肢款和下肢款2种,外侧为固定用布料,内侧设置气囊;减压装置主体为加压阀;微型计时器使用电子计时器,通过一个插入式卡扣与产气发热装置上的卡槽进行固定。结果:采用该止血带可使高原寒区肢体创伤后大出血伤员在1~2 s完成止血自救操作,且能有效防止伤员患肢失温。结论:该止血带具有操作简便、止血保温效果较好的特点,且可视情况调节压力,对于提高高原寒区肢体创伤后大出血伤员的自救能力具有重要意义。

关键词：高原寒区止血带肢体创伤大出血

Liquid biopsy:Precise diagnosis and therapy for cholangiocarcinoma

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World Journal of Gastrointestinal Oncology 2022年第1期14卷 362-365页

作者： si-Qin Wang chu-Xing Chai Bi-Rong Wang Feng Zhu Dan Shang Min Li Department of Vascular Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022Hubei ProvinceChina Department of Hepatobiliary Surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022Hubei ProvinceChina Department of Breast and Thyroid Surgery Wuhan Fourth HospitalPuai HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina

The following letter to the editor highlights the review titled“Liquid biopsy in cholangiocarcinoma:Current status and future perspective”in World J Gastrointest Oncol 2021;13:*** is necessary to realize individuali... 详细信息

关键词： Liquid biopsy Cholangiocarcinoma Diagnosis Therapy Precision medicine

Inhibitory effect of schisandrin B on free fatty acid-induced steatosis in L-02 cells

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World Journal of Gastroenterology 2011年第19期17卷 2379-2388页

作者： Jian-Hong chu Hui wang yan ye Ping-Kei Chan si-Yuan Pan Wang-Fun Fong Zhi-Ling Yu Center for Cancer and Inflammation Research School of Chinese Medicine Hong Kong Baptist Uni- versity Kowloon Tong Hong Kong China Department of Pharmacology Beijing University of Chinese Medicine Beijing 100015 China

AIM:To investigate the effects of schisandrin B (Sch B) on free fatty acid (FFA)-induced steatosis in L-02 ***:Cellular steatosis was induced by incubating L-02 cells with a FFA mixture (oleate and palmitate at the ratio of 2:1) for 24 *** and apoptosis were evaluated by 3-(4,5-dmethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay and Annexin V/propidium iodide staining,*** total lipid was determined using a photocolorimetric method after Nile red staining,and triglyceride content was measured using an enzymatic *** study the effects of Sch B on steatosis,L-02 cells were treated with Sch B (1-100 μmol/L) in the absence or presence of 1 mmol/L FFA for 24 h,and cellular total lipid and triglyceride levels were *** explore the mechanisms of action of Sch B in the steatotic L-02 cells,mRNA levels of several regulators of hepatic lipid metabolism including adipose differentiation related protein (ADRP),sterol regulatory element binding protein 1 (SREBP-1),peroxisome proliferator-activated receptor (PPAR)-α and PPAR-γ were measured by quantitative real-time polymerase chain reaction (PCR),and protein levels of ADRP and SREBP-1 were measured by ***:Treatment with 1 mmol/L FFA for 24 h induced intracellular lipid accumulation in L-02 cells comparable to that in human steatotic livers without causing apparent apoptosis and *** B mitigated cellular total lipid and triglyceride accumulations in the steatotic L-02 cells in a dose-dependent *** real-time PCR and Western blot analyses revealed that treatment of L-02 cells with 100 μmol/L Sch B reverted the FFA-stimulated up-regulation of ADRP and ***:Sch B inhibits FFA-induced steatosis in L-02 cells by,at least in part,reversing the up-regulation of ADRP and SREBP-1.

关键词： Free fatty acid Hepatic lipid metabolism Hepatocellular steatosis L-02 cells Schisandrin B

(Gd_(1/7)Dy_(1/7)Ho_(1/7)Er_(1/7)Tm_(1/7)Yb_(1/7)Lu_(1/7))_(2)si_(2)O_(7)高熵稀土双硅酸盐:一种极具应用潜力的环境障涂层材料

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Science China Materials 2024年第8期67卷 2694-2699页

作者：刘洋庄磊谢平波俞呼雷褚衍辉 School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China

作为一种潜在的环境障涂层材料,高熵稀土双硅酸盐的热物理化学性质至关重要.本文报道了一种新型(Gd_(1/7)Dy_(1/7)Ho_(1/7)Er_(1/7)Tm_(1/7)Yb_(1/7)Lu_(1/7))_(2)si_(2)O_(7)高熵稀土双硅酸盐(7HERED),它兼具与siC_(f)/siC复合材料良好的热膨胀系数匹配性、超低的热导率(1273K时为1.5Wm^(-1)K^(-1))、高达1973K的高温稳定性以及在1673K下优异的耐水氧腐蚀性等优异的综合性能.这种优异的综合性能可归因于7HERED的高熵效应和晶格畸变效应.本文所开发的7HERED有望作为下一代环境障涂层材料.

关键词：晶格畸变热膨胀系数环境障涂层硅酸盐匹配性物理化学性质高熵高温稳定性

Isosteroidal Alkaloids from Fritillaria verticillata Willd. and Their NMR Spectroscopic Characteristics

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Chinese Journal of Chemistry 2022年第16期40卷 1945-1956页

作者： Nan Ma Ya-Jing Wang Gang Chen chu-Ren Meng chun-Lin Guo Yong-Fu Lu si-Yang Dai si-Xuan Liu Yong-Fu Li Chang Li Yue-Hu Pei Department of Medicinal Chemistry and Natural Medicine Chemistry College of PharmacyHarbin Medical UniversityHarbinHeilongjiang150081 China Shenyang Pharmaceutical University ShenyangLiaoning 110016China

Chemical investigation of Fritillaria verticillata *** to the isolation of eight novel isosteroidal alkaloids(1—4,6,9—11)and four known alkaloids(5,7—8,12),including three unprecedented cis-fused D/E(13α,17α)cevanine alkaloids(1—3),one rarely cis-fused E/F(22α)cevanine alkaloid(6),and one uncommon 5β-jervine-type isosteroidal alkaloid featuring a cis-fused A/B ring moiety(11).In order to establish the structures of 1,the calculated NMR with DP4+evaluation was applied from the plausible structure *** characteristic proton signals for distinguishing D/E conjunction of cevanine alkaloids were *** addition,some proton and carbon signalsαto nitrogen in 6 and 7 are unobservable due to the 14N nuclear quadrupolar relaxation,based on the NMR experiments in different solvents,calculated NMR method and X-ray technology,their structures were *** NMR characteristics of cevanine alkaloids to distinguish orientation of long-pair on nitrogen atom withβ-hydroxyl at C-20 were also *** anti-inflammatory effects of compounds 1 and 4 were evaluated in LPS-activated RAW 264.7 *** 4 decreased LPS-induced releases of IL-1βand IL-17αin RAW264.7 cells in a dose-dependent *** mechanistic study revealed that 4 suppressed the phosphorylation of IκBαand p65 subunit to regulate the NF-κB signaling pathway.

关键词： Alkaloids Fritllaria Structure elucidation Spectroscopic characteristics Inflammatory

Conceptual and theoretical dimensions of biodiversity research in China: examples from plants

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National Science Review 2021年第7期8卷 30-33页

作者： Chengjin chu Lei Chen Pengfei Fan Ziwen He Yuanzhi Li Jinbao Liao Xubing Liu Kechang Niu Xingfeng si Shaopeng Wang Xinqiang Xi State Key Laboratory of Biocontrol and School of Life Sciences Sun Yat-sen University Department of Ecology School of Life Sciences Nanjing University Zhejiang Tiantong Forest Ecosystem National Observation and Research Station School of Ecological and Environmental Sciences East China Normal University Institute of Ecology College of Urban and Environmental Sciences and Key Laboratory for Earth Surface Processes of the Ministry of Education Peking University

The search for the underlying mechanisms of species origin, maintenance and extinction is among the highest priorities in biodiversity science. In parallel with the rapid accumulation of empirical evidence for existin...

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硅微透镜阵列与红外焦平面阵列的集成器件的制备与性能(特邀)

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光子学报 2024年第7期53卷 42-48页

作者：侯治锦王旭东陈艳王建禄褚君浩复旦大学光电研究院光伏科学与技术全国重点实验室上海市智能光电与感知前沿科学研究基地上海200433 中国科学院上海技术物理研究所红外物理国家重点实验室上海200083

为了提高红外焦平面阵列性能,分别制备了硅衍射微透镜阵列和InSb红外焦平面阵列并将两者集成在一起。采用光学系统和焦平面测试系统进行了测试。结果显示双面镀制有增透膜的硅衍射微透镜阵列的衍射效率为83.6%;电压响应图显示器件没有裂... 详细信息

为了提高红外焦平面阵列性能,分别制备了硅衍射微透镜阵列和InSb红外焦平面阵列并将两者集成在一起。采用光学系统和焦平面测试系统进行了测试。结果显示双面镀制有增透膜的硅衍射微透镜阵列的衍射效率为83.6%;电压响应图显示器件没有裂纹;集成器件的工作波段为3.7~4.8μm,此时平均黑体响应率和探测率分别为4.85×10^(7)V/W和7.12×10^(9)cm·Hz^(1/2)·W^(1)。结果表明硅微透镜阵列不仅可以提高焦平面阵列占空因子,而且可以通过优化焦平面应力匹配来解决芯片裂纹问题,集成器件性能优于现有焦平面性能。

关键词：集成红外焦平面阵列硅微透镜阵列占空因子芯片裂纹