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Highly elastic cobweb-like SiO/CNF composites with reconstructed heterostructure for high-efficient lithium storage

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Chinese Chemical Letters 2021年第9期32卷 2914-2918页

作者： Jie liu miao Ben Andeng liu Jianwen liu Shiquan Wang Jiujun Zhang Hubei Collaborative Innovation Center for Advanced Organic Chemical materials&ministry of Educational Key Laboratory for the Synthesis and Application of Organic Functional molecules&College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062China Institute for Sustainable Energy College of ScienceShanghai UniversityShanghai 200444China

The silicon-based materials are promising candidates for lithium-ion batteries owing to their high energy ***,achieving long lifespan under realistic conditions remains a challenge because of the volume expansion and low *** this work,the highly elastic cobweb-like composite materials consisted by SiO and nanofibers are designed and fabricated for high-efficient lithium storage by ballmilling&electrostatic spinning *** reconstructed heterostructure and highly elastic nanofibers can simultaneously increase the conductivity and inhibit the"expansion effect"of silicon-based *** constructed electrode of n-SiO/CNF delivers an initial capacity of 1700 m Ah/g,and maintains the capacities over 1000 m Ah/g after 100 cycles at the current density of 500 m A/***,this electrode can give an initial coulombic efficiency over 85%and maintains at 98%in the following charge/discharge ***,it exhibits efficient long-term electrochemical performance,maintaining the capacity at about 1000 m Ah/g at a high current density of 1000 m A/g after 1000 *** work could provide a promising strategy for enhancing the performance of siliconbased composite materials for practical application in lithium-ion batteries.

关键词： Lithium ion batteries Silicon-based materials SiO/CNF composites Highly elastic composites Reconstructed heterostructure

Antidepressant effects of Yuanzhi (Polygalae Radix) extract on chronic unpredictable mild stress-induced depression in rats: modulation of the NLRP3 inflammasome and NF-κB pathway

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Digital Chinese medicine 2024年第2期7卷 184-194页

作者： CHEN Yuzhen ZHAO Yongzhi ZHANG Yiwen CHEN Fang Iqbal Choudhary muhammad liu Xinmin JIANG Ning Institute of medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100193China Hunan Engineering and Technology Research Center of medicinal and Edible Homologous Functional Food Hunan University of Chinese MedicineChangshaHunan 410208China Pharmay School of Shihezi University/Key Laboratory of Xinjiang Phytomedicine Resource and Utilization Ministry of EducationShiheziXinjiang 832003China International Center for Chemical and Biological Sciences University of KarachiKarachiSandh 75270Pakistan Institute of Drug Discovery Technology Ningbo UniversityNingboZhejiang 315211China

Objective To investigate the antidepressant effects of Yuanzhi(Polygalae Radix;PR)aqueous extract on chronic unpredictable mild stress(CUmS)-induced depression rat models and the underlying *** A total of 40 male Sprague Dawley(SD)rats were randomly divided into control;model;low dose of PR(PR-L;0.5 g/kg);high dose of PR(PR-H;1 g/kg);and fluoxetine(10 mg/kg)groups;with 8 rats in each *** for the rats in control group;those in the other four groups underwent CUmS-induced depression *** and fluoxetine were administered intragastrically once daily;30 min prior to the CUmS procedure;for 14 consecu-tive days until the behavioral tests were *** CUmS modeling;the sucrose prefer-ence test(SPT);open field test(OFT);novelty-suppressed feeding test(NSFT);forced swim test(FST);and tail suspension test(TST)were employed to assess the pharmacological ef-fects of PR on the mitigation of depressive-like behaviors in rat ***;the en-zyme-linked immunosorbent assay(ELISA)was utilized to quantify the serum levels of tumor necrosis factor(TNF)-α;interleukin(IL)-6;and IL-1βin the *** blot analysis was al-so conducted to evaluate the protein expression levels of nuclear factor kappa-B(NF-κB);in-ducible nitric oxide synthase(iNOS);cyclooxygenase-2(COX-2);nucleotide-binding oligomerization domain(NOD)-like receptor family pyrin domain containing 3(NLRP3);apoptosis-associated speck-like protein containing caspase recruitment domain(ASC);and caspase-1 in the hippocampal tissues of the *** staining was per-formed to observe the morphological changes in ionized calcium-binding adapter molecule 1 positive(Iba-1+)cells in the dentate gyrus(DG)of rats with CUmS-induced ***(i)Treatment with PR-H and fluoxetine resulted in significant enhancements in both the total distance and time the rats moved during tests(Pministration of PR-H and fluoxetine also led to s

关键词： Depression Yuanzhi(Polygalae Radix) Chronic unpredictable mild stress(CUmS) Proinflammatory cytokine Neuroinflammatory

广东省东莞市国土空间生态安全格局构建与分析

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自然资源遥感 2024年第2期36卷 126-134页

作者：刘永林高益忠陈明辉邱玲东莞市地理信息与规划编制研究中心东莞523129

构建国土空间生态安全格局可以约束和引导城市空间发展,实现城市发展与区域环境协调可持续发展。本研究通过遥感生态指数、最小累计阻力模型等方法,识别广东省东莞市生态安全格局的生态源地、生态廊道、生态夹点及生态障碍点等要素,提... 详细信息

构建国土空间生态安全格局可以约束和引导城市空间发展,实现城市发展与区域环境协调可持续发展。本研究通过遥感生态指数、最小累计阻力模型等方法,识别广东省东莞市生态安全格局的生态源地、生态廊道、生态夹点及生态障碍点等要素,提出相关优化建议。结果表明:①全市生态基底好,生态空间连片,生态廊道分布均匀且能够有效串联生态源地;②滨水空间保护提升和道路绿化建设为生态要素流动提供有效路径;③农业生产、交通运输对生态网络影响最强烈,其次是工业生产和居民生活;④应将生态源地、12 m宽生态廊道和生态夹点划为生态保护重点区,将200 m宽生态廊道和生态障碍点划为生态修复重点区。本研究可为东莞市构建国土空间生态安全格局提供科学依据。

关键词：生态源地生态廊道生态安全格局国土空间规划东莞市

河北典型入海河口丰水期微塑料赋存特征及来源分析

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海洋环境科学 2024年第4期43卷 612-618页

作者：刘有才张蒨李林强曹为河北省水文工程地质勘查院(河北省遥感中心) 河北石家庄050021 自然资源部第一海洋研究所山东青岛266061

为探究入海河口表层海水的微塑料赋存及来源,掌握微塑料分布基线,服务海洋生态环境保护及预警监测工作,本研究选取河北省大蒲河口、大清河口、南排河口3个典型河口进行微塑料污染调查。通过采样、预处理和鉴定研究发现,河北近岸海域表... 详细信息

为探究入海河口表层海水的微塑料赋存及来源,掌握微塑料分布基线,服务海洋生态环境保护及预警监测工作,本研究选取河北省大蒲河口、大清河口、南排河口3个典型河口进行微塑料污染调查。通过采样、预处理和鉴定研究发现,河北近岸海域表层海水微塑料丰度为(0.14±0.11)n/m^(3),粒径范围主要集中在0.5~2.0 mm,聚合物类型主要为人造丝(Rayon),其次为聚对苯二甲酸乙二醇酯(PET)。多样性指数分析显示,经济结构、人类活动及河道汇水面积等因素对河口微塑料浓度产生影响,不同河口微塑料污染程度和来源存在差异,河北海域的表层海水微塑料丰度总体处于较低水平。

关键词：微塑料入海河口表层海水赋存特征来源分析

THE CHEmICAL STRUCTURE OF CELASTRINE FROm CELASTRUS FLAGELLARIS

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Chinese Chemical Letters 1995年第8期6卷 679-680页

作者： Wang, mA Wang, m liu, J Chen, FH Hong, SL ma, LB Beijing Agr Univ Dept Appl Chem Beijing 100094 Peoples R China Beijing Inst microchem Beijing 100091 Peoples R China

A now sesquiterpenoid named as celastrine was isolated from the seed oil of Celastrus flagellaris Rupr. Its structure was determined as 1 alpha ,6 beta ,8 alpha ,13-tetraacetoxy-9 alpha -benzoyloxy-beta -dihydroagarofuran by UV, IR, mS and NmR(H-1 NmR, C-13 NmR, H-1-H-1 COSY, H-1-C-13 COSY, NOESY and HmBC) spectra.

关键词：

康力欣胶囊联合TX方案治疗晚期三阴性乳腺癌的临床研究

维普期刊数据库评论

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现代药物与临床 2024年第9期39卷 2365-2370页

作者：刘沙王明坤潘涛张爽杨屏海南医学院第一附属医院放疗科海南海口570000

目的探讨康力欣胶囊联合TX方案治疗晚期三阴性乳腺癌的临床疗效。方法选取2020年1月—2024年1月海南医学院第一附属医院收治的116例晚期三阴性乳腺癌患者,按随机数字表法将患者分为对照组和治疗组,每组各58例。对照组接受TX方案治疗,... 详细信息

目的探讨康力欣胶囊联合TX方案治疗晚期三阴性乳腺癌的临床疗效。方法选取2020年1月—2024年1月海南医学院第一附属医院收治的116例晚期三阴性乳腺癌患者,按随机数字表法将患者分为对照组和治疗组,每组各58例。对照组接受TX方案治疗,第1天静脉滴注多西他赛注射液,75 mg/m2;第1~14天餐后30 min温水吞服卡培他滨片,1 250mg/m2,2次/d。治疗组在对照组治疗基础上餐后30 min温水口服康力欣胶囊,3粒/次,3次/d。两组均以21 d为1个周期,连续治疗4个周期。观察两组的临床疗效,比较两组治疗前后病灶最大径、简式抑郁-焦虑-压力量表(DASS-21)评分、癌症治疗性功能评价量表-乳腺癌(FACT-B)评分及血清肿瘤标志物、白细胞介素-6(IL-6)、CC趋化因子配体20(CCL20)和外周血T淋巴细胞亚群水平变化。统计两组药物不良反应情况。结果治疗后,治疗组客观缓解率(ORR)、疾病控制率(DCR)分别是50.00%、86.21%,显著高于对照组的31.03%、70.69%(P<0.05)。治疗后,两组病灶最大径显著减小,DASS-21评分均明显降低(P<0.05);治疗后,治疗组病灶最大径和DASS-21评分改善均显著优于对照组(P<0.05)。治疗后,两组FACT-B各维度评分和总评分均较治疗前显著升高(P<0.05);治疗后,治疗组FACT-B评分高于对照组(P<0.05)。治疗后,两组血清癌胚抗原(CEA)、糖类抗原15-3(CA15-3)、IL-6、CCL20水平均显著降低,治疗组CD4+和CD4+/CD8+显著升高(P<0.05);治疗后,治疗组血清肿瘤标志物、IL-6、CCL20和外周血T淋巴细胞亚群水平改善优于对照组。治疗过程中,治疗组血小板降低、白细胞降低、胃肠道反应发生率分别是10.34%、13.79%、15.52%,均显著低于对照组的(24.14%、31.03%、34.48%)(P<0.05)。结论康力欣胶囊联合TX方案能提高晚期三阴性乳腺癌患者的近期疗效,可有效减轻肿瘤负荷,改善肿瘤微环境,提高机体抗肿瘤免疫效应,改善患者不良情绪和生活质量。

关键词：康力欣胶囊多西他赛注射液卡培他滨片晚期三阴性乳腺癌简式抑郁-焦虑-压力量表评分癌症治疗性功能评价量表-乳腺癌评分白细胞介素-6 CC趋化因子配体20

Surface characteristics analysis of fractures induced by supercritical CO_(2)and water through three-dimensional scanning and scanning electron micrography

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Journal of Rock mechanics and Geotechnical Engineering 2021年第5期13卷 1047-1058页

作者： Hao Chen Yi Hu Jiawei liu Feng liu Zheng liu Yong Kang Xiaochuan Wang Hubei Key Laboratory of Waterjet Theory and New Technology Wuhan UniversityWuhan430072China School of Power and mechanical Engineering Wuhan UniversityWuhan430072China

morphology of hydraulic fracture surface has significant effects on oil and gas flow,proppant migration and fracture closure,which plays an important role in oil and gas fracturing *** this paper,we analyzed the fracture surface characteristics induced by supercritical carbon dioxide(SC-CO_(2))and water in open-hole and perforation completion conditions under triaxial stresses.A simple calculation method was proposed to quantitatively analyze the fracture surface area and roughness in macro-level based on three-dimensional(3D)scanning *** micro-level,scanning electron micrograph(SEm)was used to analyze the features of fracture *** results showed that the surface area of the induced fracture increases with perforation angle for both SC-CO_(2)and water fracturing,and the surface area of SC-CO_(2)-induced fracture is 6.49%e58.57%larger than that of water-induced *** fractal dimension and surface roughness of water-induced fractures increase with the increase in perforation angle,while those of SC-CO_(2)-induced fractures decrease with the increasing perforation angle.A considerable number of microcracks and particle peeling pits can be observed on SC-CO_(2)-induced fracture surface while there are more flat particle surfaces in water-induced fracture surface through SEm images,indicating that fractures tend to propagate along the boundary of the particle for SC-CO_(2)fracturing while water-induced fractures prefer to cut through *** findings are of great significance for analyzing fracture mechanism and evaluating fracturing stimulation performance.

关键词： Supercritical carbon dioxide(SC-CO_(2))fracturing Quantitative characterization of surface features Surface roughness and fractal dimension Three-dimensional(3D)scanning Scanning electron micrograph(SEm)

Effects of grain boundary diffusion process on magnetic properties enhancement and microstructure evolution of hot-deformed Nd-Fe-B magnets

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Journal of Rare Earths 2023年第5期41卷 698-704,I0003页

作者： Jiayi He Yukun liu Zhigao Yu Jiali Cao Hongya Yu Zhongwu liu School of materials Science and Engineering South China University of TechnologyGuangzhou 510640China

Grain boundary diffusion(GBD)process is an important approach for producing Nd-Fe-B magnets with high coercivity and high thermal *** GBD for hot-deformed Nd-Fe-B magnets with nanocrystalline micro structure is more complicated compared to sintered ***,we investigated the effects of different GBD methods,i.e.,intergranular addition(in-situ GBD 1#),in-situ GBD from magnet surface during hot pressing and hot deformation(in-situ GBD 2#),and conventional GBD,on the magnetic properties and microstructure of hot deformed *** the treatment by these three GBD approaches using 2 wt%Pr_(40)Tb_(30)Cu_(30)diffusion source,the coercivity of the hot-deformed magnet increases from 1281 to 1567,1412 and 2022 kA/m,*** coercivity enhancement is attributed to the formation of local(Nd,Tb)2Fe14B phase with stro ng magnetic *** grain orientation is found in both in-situ GBD 1#and conventional GBD treated samples mainly due to the local stress state variation and the rotation of platelet ***,the in-situ GBD 2#processed sample has a high orientation at diffusion surface,which may be caused by the modified surface state of the magnet by the diffusion *** with the in-situ GBD processes,the conventional GBD exhibits a higher utilization efficiency of *** the in-situ GBD is effective to treat thick hot-deformed magnets,further effort should be aimed at enhancing its diffusion efficiency.

关键词： Nd-Fe-B Grain boundary diffusion Coercivity hot deformation Crystal orientatio

河北省东部滨海盐碱地区饲用燕麦品种适应性评价研究

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黑龙江畜牧兽医 2024年第13期 78-84页

作者：刘青松徐玉鹏刘桂霞刘全超屈新月陈雅琦岳明强曹培霞阎旭东贾艳丽沧州市农林科学院河北沧州061001 河北大学生命科学学院河北保定071002 沧州市林业有害生物防治检疫站河北沧州061001 泊头市农业农村局河北泊头062150

为了研究不同燕麦品种在河北省东部滨海盐碱地不同含盐量土壤下的适应性,试验将8个燕麦品种分别种植于土壤含盐量为0.08%、0.24%和0.45%的3个土壤含盐量地块,每个品种3个重复,每个重复1个小区,小区面积为6 m^(2)(2 m×3 m),共72个试验... 详细信息

为了研究不同燕麦品种在河北省东部滨海盐碱地不同含盐量土壤下的适应性,试验将8个燕麦品种分别种植于土壤含盐量为0.08%、0.24%和0.45%的3个土壤含盐量地块,每个品种3个重复,每个重复1个小区,小区面积为6 m^(2)(2 m×3 m),共72个试验小区。燕麦种子于2022年3月3日播种,播种量为150 kg/hm^(2),行距为20 cm,播前施复合肥(N∶P2O5∶K2O质量比为17∶17∶17)600 kg/hm^(2),小区采取人工除草,整个生育期无灌溉。统计不同燕麦品种在不同含盐量土壤下的生育期、产草量;于乳熟期每个小区随机取燕麦鲜样500 g检测燕麦粗蛋白和碳水化合物含量;燕麦植株灰化后测定K+、Na+和Cl-含量。结果表明:随着土壤含盐量的升高,燕麦生育期延后。土壤含盐量为0.24%时,较土壤含盐量为0.08%时的燕麦鲜草产草量、干草产量降低,但差异不显著(P>0.05);但当土壤含盐量为0.45%时,较土壤含盐量为0.08%和0.24%时的燕麦鲜草产草量、干草产量显著降低(P<0.05);当土壤含盐量为0.08%和0.24%时,Ivo和Black Roque的鲜草产量、干草产量均显著高于其他品种(P<0.05)。在3个土壤含盐量水平下,随着盐分含量的升高,各燕麦品种(除Black Roque外)粗蛋白含量均表现为逐渐升高趋势,而碳水化合物则呈逐渐降低趋势;Ivo和Black Roque的粗蛋白含量、碳水化合物(除Forage plus外)含量显著高于其他品种(P<0.05),适应性最好。在3个土壤含盐量水平下,土壤含盐量为0.24%时燕麦K+、Na+和Cl-含量最高,对盐分离子吸收效果最好;Ivo和Black Roque的K+、Na+和Cl-含量显著高于其他品种(P<0.05)。说明Ivo和Black Roque在河北省东部滨海盐碱地区的适应性最好,适宜在河北省东部滨海轻度盐碱地(土壤含盐量低于0.3%)推广种植。

关键词：滨海盐碱地燕麦产量品质适应性