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Rare Metals 2021年第9期40卷 2568-2578页

作者： zi-min Zhou Hui Peng Lei Zheng Hong-Bo Guo Sheng-Kai Gong School of Materials Science and Engineering Beihang UniversityBeijing 100191China Beijing Key Laboratory for Advanced Functional Material and Thin Film Technology Beihang UniversityBeijing 100191China Key Laboratory of Aerospace Materials and Performance(ministry of Education) Beihang UniversityBeijing 100191China

Thermal barrier coatings(TBCs) consisting ofLa_(2)Ce_(2)O_(7)(LCO) and Y_(2)O_(3)-stabilized-ZrO_(2)(YSZ) doubleceramic layer and Dy/Pt co-doped NiAl bond coat were produced by electron beam physical vapor deposition(EBPVD). Thermal cyclic performance of the TBCs was evaluated by flame shock testing at 1300 ℃. For comparison, the TBCs with a undoped NiAl bond coat were also studied. The microstructural evolution and failure mechanisms of the above TBCs during thermal cycling were investigated. Spallation failure of the TBCs with the undoped bond coat occurs after around 500 cycles by cracking at the interface between YSZ ceramic layer and thermally grown oxides(TGO) layer. The TBCs with Pt/Dy modified bond coat reveal improved interface bonding even after 1200 thermal cycles, whereas some delamination cracks are presented in the LCO layer. On the other hand,the Pt/Dy modified bond coat effectively suppresses the formation of the needle-like topologically closed packed phases(TCP) in the single crystal superalloy.

关键词： Thermal barrier coatings NiAl bond coat Pt/Dy co-doping Electron beam physical vapor deposition Thermal cycling Interdiffusion

混凝土裂缝修复用纳米改性环氧压注胶的制备与性能

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热固性树脂 2024年第4期39卷 7-12页

作者：凌枫冉志红林帆陈自敏云南大学建筑与规划学院云南昆明650091

在环氧树脂中添加纳米材料进行改性,以期得到强度更高、延性更好的混凝土裂缝修复材料。通过粘度和力学性能测试研究了固化剂与纳米TiO_(2)的用量和超声分散处理对纳米改性环氧树脂性能的影响。结果表明,固化剂593的最佳用量为环氧树脂E... 详细信息

在环氧树脂中添加纳米材料进行改性,以期得到强度更高、延性更好的混凝土裂缝修复材料。通过粘度和力学性能测试研究了固化剂与纳米TiO_(2)的用量和超声分散处理对纳米改性环氧树脂性能的影响。结果表明,固化剂593的最佳用量为环氧树脂E-51质量的28%,加入环氧树脂质量1%的纳米TiO_(2)后,复合材料的断裂伸长率、弯曲强度、冲击韧性和正拉粘接强度分别较纯环氧树脂提升了58.1%、15.4%、67.1%、80.4%。经60min超声分散处理后,1%纳米TiO_(2)/EP压注胶的弯曲强度、冲击韧性和正拉粘接强度分别较超声分散前提升了11.1%、6.9%、9.5%。通过扫描电子显微镜(SEM)观察冲击试样断面形貌发现,纳米改性复合材料的韧性较纯环氧树脂有明显提升。

关键词：环氧树脂纳米TiO_(2) 混凝土裂缝修复压注胶超声分散

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粉煤灰改良粉砂土动静力学特性研究

科学技术与工程 2024年第4期24卷 1619-1626页

作者：周桓锐崔高航程卓李琦张永珍闵子桐东北林业大学土木工程学院哈尔滨430070 河北工业大学土木与交通学院天津300401

为探究不同粉煤灰掺量粉砂土的动力特性和粉煤灰改良粉砂土的改性机理,以绥化—大庆高速公路路基填土为研究对象,开展无侧限压缩试验和动三轴试验,分析粉煤灰掺量对粉砂土静力学特征影响情况,以及围压、动荷载加载次数和粉煤灰掺量对改... 详细信息

为探究不同粉煤灰掺量粉砂土的动力特性和粉煤灰改良粉砂土的改性机理,以绥化—大庆高速公路路基填土为研究对象,开展无侧限压缩试验和动三轴试验,分析粉煤灰掺量对粉砂土静力学特征影响情况,以及围压、动荷载加载次数和粉煤灰掺量对改良粉砂土动强度的影响规律。结果表明:围压相同的情况下,土体的无侧限压缩强度和动强度,均随粉煤灰掺量增加先升高后降低;加载次数相同时,围压越大,土体动强度越大;选取加载次数为100次动强度进行拟合分析,得出粉煤灰掺入量与动剪切强度对应关系的经验公式。为改善路基强度,加快粉煤灰综合利用进程,结合试验结果与数据分析,建议在粉砂土路基掺加质量比15%粉煤灰进行路基施工。15%粉煤灰掺入量的改良粉砂土对比素土,存在颗粒紧凑,孔隙更小,结构相对致密,骨架更强等优点,可为东北地区粉砂土改良等工程建设提供参考。

关键词：粉煤灰改良粉砂土动静荷载综合作用动强度道路路基土定性分析

How to rectify the misuse of scientific names in bioscience?

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Chinese Science Bulletin 2014年第13期59卷 1479-1481页

作者： zi-min Hu Lopez-Bautista Juan De-Lin Duan Institute of Oceanology Chinese Academy of Sciences Department of Biological Sciences The University of Alabama

The misuse of scientific names for species of organisms is a widespread and long-standing academic phenomenon;however,its negative impacts to scientific community and the public have been largely overlooked all *** we exemplified two research cases in seaweeds to highlight the extent and dimension of misused scientific names of species in bioscience,and present a few feasible measurements to rectify such a *** ultimate goal is to create a discussion platform and to draw deserved attention of scientific name to taxonomy-related scientists.

关键词：生物科学名称误用纠正生物物种科学家分类学海藻

盾粉/橡胶增容复合材料性能与机理的光谱学分析

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光谱学与光谱分析 2024年第4期44卷 1177-1182页

作者：于先坤徐维成张浩吴玉喜李海丽龙红明程峥明刘自民容北国张贵文冶金减排与资源综合利用教育部重点实验室(安徽工业大学) 安徽马鞍山243002 安徽工业大学冶金工程学院安徽马鞍山243032 安徽工业大学建筑工程学院安徽马鞍山243032 中钢集团马鞍山矿山研究院股份有限公司安徽马鞍山243000 首钢京唐钢铁联合有限责任公司河北唐山063200 马鞍山钢铁股份有限公司安徽马鞍山243003 桂林鸿程矿山设备制造有限责任公司广西桂林541002 江苏华安橡胶科技有限公司江苏宿迁223600

碳酸钙是橡胶生产中重要的无机填充剂,具有增容、补强等功能。随着中国橡胶需求量的不断增长,碳酸钙用量不断扩大,其生产成本与能源消耗等问题日益突出。钢渣是炼钢过程中产生的副产品,存在着利用率低、堆积量大等问题。钢渣的主要成分... 详细信息

碳酸钙是橡胶生产中重要的无机填充剂,具有增容、补强等功能。随着中国橡胶需求量的不断增长,碳酸钙用量不断扩大,其生产成本与能源消耗等问题日益突出。钢渣是炼钢过程中产生的副产品,存在着利用率低、堆积量大等问题。钢渣的主要成分为CaO、SiO_(2)、Fe_(x)O_(y)、Al_(2)O_(3)等物质,物化性能与传统填料相近,且钢渣的耐磨性与多孔性优异,因此利用钢渣替代部分碳酸钙作为橡胶填充材料不仅具有重要研究意义而且可以缓解能源消耗、环境污染等问题。基于此,利用自制功能复合剂和超细立磨的方法对钢渣进行联合处理得到粒径800目的样品盾粉,制备活性碳酸钙与盾粉用量比不同的盾粉/橡胶增容复合材料。利用智能型硫化仪、电子拉力机、橡胶硬度计、微型量热仪(MCC)对制备的盾粉/橡胶增容复合材料进行性能测试,热重分析-傅里叶变换红外光谱仪(TG-FTIR)、拉曼光谱仪(Ram)对盾粉/橡胶增容复合材料进行表征分析。结果表明:盾粉替代部分活性碳酸钙对橡胶体系硫化性能有一定的促进作用,可以提高盾粉/橡胶增容复合材料的硫化速度;盾粉的加入可以提高复合橡胶体系的力学性能与阻燃性能;通过微型量热仪(MCC)和拉曼光谱仪(Ram)对盾粉/橡胶增容复合材料分析发现,盾粉替代部分活性碳酸钙后的橡胶体系热释放能力和总热释放量降低、炭渣石墨化程度提升,进一步说明了盾粉替代部分活性碳酸钙在保证盾粉/橡胶增容复合材料物理学性能的前提下也具有一定的阻燃性能。热重-红外分析表明盾粉/橡胶增容复合材料在裂解过程中产生的气体主要为碳氢化合物;自制功能复合剂的加入可以缓解钢渣界面与橡胶界面不相容的问题,优化橡胶复合材料。以上研究为制备性能更优的盾粉/橡胶增容复合材料提供数据理论支持。

关键词：钢渣橡胶表面改性固废利用

Gastrointestinal insights during the COVID-19 epidemic

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World Journal of Clinical Cases 2020年第18期8卷 3934-3941页

作者： Kai Nie Yuan-Yuan Yang min-zi Deng Xiao-Yan Wang Department of Gastroenterology The Third Xiangya Hospital of Central South UniversityChangsha 410000Hunan ProvinceChina

Coronavirus disease-2019(COVID-19)has so far caused hundreds of mortalities *** respiratory symptoms are the main complication in COVID-19 patients,the disease is also associated with gastrointestinal problems,with diarrhea,nausea,and vomiting being primary COVID-19 ***,cancer and inflammatory bowel disease(IBD)management,stool viral tests,and virus exposure are major concerns in the context of COVID-19 *** patients with colorectal cancer and IBD,the colonic mucosa exhibits elevated angiotensin-converting enzyme 2 receptor levels,enhancing COVID-19 *** some cases,positive viral stool tests may be the only indicator of infection at admission or after leaving *** supplemental stool tests,the risk of undetected COVID-19 transmission is ***,viral exposure during the regular or emergency endoscopic examination should be *** carefully discuss key gastrointestinal concerns with regard to COVID-19 and call for more attention to such problems.

关键词： COVID-19 SARS-CoV-2 Diarrhea Colorectal cancer Inflammatory bowel disease Stool tests

超声引导下SASD药物注射联合聚焦式体外冲击波治疗肩峰下撞击综合征的临床疗效

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中国疗养医学 2024年第10期33卷 89-93页

作者：乔源鑫杨阳宋子民张荣方南阳市中医院运动医学科河南南阳473000 南阳市中医院冲击波治疗室河南南阳473000

目的探讨超声引导下肩峰下-三角肌下滑囊(SASD)药物注射联合聚焦式体外冲击波治疗肩峰下撞击综合征(SIS)患者的临床疗效。方法选取南阳市中医院2020年1月至2023年12月收治的70例SIS患者,根据治疗方案不同分为冲击波组和SASD注射组,各35... 详细信息

目的探讨超声引导下肩峰下-三角肌下滑囊(SASD)药物注射联合聚焦式体外冲击波治疗肩峰下撞击综合征(SIS)患者的临床疗效。方法选取南阳市中医院2020年1月至2023年12月收治的70例SIS患者,根据治疗方案不同分为冲击波组和SASD注射组,各35例。冲击波组采用聚焦式体外冲击波治疗,SASD注射组在冲击波治疗基础上联合超声引导下SASD注射复方倍他米松和利多卡因治疗。比较两组临床总有效率、治疗前后肩关节功能评分[Constant-Murley功能评分(CMS)]、疼痛介质[5-羟色胺(5-HT)、前列腺素E2(PGE2)]水平及疼痛视觉模拟评分(VAS)、血清炎症因子[白细胞介素-1(IL-1)、白细胞介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)]及不良反应。结果治疗后,SASD注射组临床总有效率97.14%高于冲击波组77.14%(P0.05)。结论超声引导下SASD药物注射联合聚焦式体外冲击波治疗SIS患者临床疗效显著,可有效抑制炎症反应,缓解患者肩部疼痛程度,改善肩关节功能,有助于病情康复。

关键词：肩峰下撞击综合征肩峰下-三角肌下滑囊复方倍他米松聚焦式体外冲击波

High-speed countercurrent chromatography for purification of single-walled carbon nanotubes

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Chinese Chemical Letters 2008年第11期19卷 1345-1348页

作者： Ying Cai Zhi Hong Yan Ying Chun Lv min zi Li ming Yuan Department of Chemistry Yunnan Normal University Kunming 650092 China Key Laboratory of ministry of Education Jiangxi University of Chinese Traditional Medicine Nanchang 330004 China

A new chromatographic purification of single-walled carbon nanotubes using high-speed countercurrent chromatography is reported. The purification was accomplished on the basis of experiment that dispersed the single-walled carbon nanotubes with sodium dodecyl sulfate, and the result mixture was separated using the two phase system composed of n-butanol/water = 1/1 （v/v）. The sizes of SWNTs separated were observed by scanning electron microscopy. The results demonstrated that the high-speed countercurrent chromatography possessed a good efficency for purification of single-walled carbon nanotubes.

关键词： High-speed countercurrent chromatography Purification Sodium dodecyl sulfate Single-walled carbon nanotubes

以假性Bartter综合征为主要表现的囊性纤维化患儿3例并文献复习

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中国当代儿科杂志 2024年第5期26卷 506-511页

作者：张继燕孙林军段效军张子敏肖政辉陈艳萍游洁玉湖南省儿童医院呼吸内科湖南长沙410001 湖南科技职业学院药学院湖南长沙410004 湖南省儿童医院儿研所湖南长沙410001 湖南省儿童医院急救中心湖南长沙410001 湖南省儿童医院消化内科湖南长沙410001

目的总结以假性Bartter综合征(pseudo-Bartter syndrome,PBS)为主要表现的囊性纤维化(cystic fibrosis,CF)(CF-PBS)患儿的临床特征和基因变异,以提高对CF-PBS的认识。方法回顾性分析2018年1月—2023年8月在湖南省儿童医院确诊的3例CF-PBS患儿的临床资料并文献复习。结果3例患儿均在婴儿期起病,入院后检验示低钠、低钾、低氯血症和代谢性碱中毒,基因检测示CFTR基因存在复合杂合变异,均诊断为CF。文献检索33例CF-PBS中国患儿,起病年龄和诊断年龄分别为1~36月龄、3~144月龄,伴有反复呼吸道感染或持续肺炎29例(88%)、营养不良26例(79%)、发育落后23例(70%)、胰腺炎或可疑胰腺外分泌功能不全18例(55%);c.2909G>A是CFTR基因最常见的变异位点,等位基因变异频率为23%(15/66)。结论CF早期无典型的呼吸道症状,对于反复出现的低钠、低钾、低氯血症和代谢性碱中毒的婴儿,特别是同时存在营养不良、发育落后,需警惕CF-PBS可能,应尽早进行CFTR基因检测协助诊断CF。

关键词：囊性纤维化假性Bartter综合征 CFTR基因儿童

Low genetic diversity in the endangered marine alga Silvetia siliquosa(Ochrophyta:Fucaceae)and the implication to conservation

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Journal of Oceanology and Limnology 2022年第1期40卷 216-225页

作者： Yanshuo LIANG Jie ZHANG Xiaohan SONG Han-Gil CHOI Xu GAO Delin DUAN zi-min HU CAS and Shandong Province Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China University of Chinese Academy Sciences Beijing 100049China Faculty of Biological Science and Institute for Environmental Science Wonkwang UniversityIksan 54538Korea Ocean School Yantai UniversityYantai 264005China

Although signifi cant research eff orts have been targeted toward conservation and management of endangered terrestrial fl ora and fauna,attempts have been limited to conserve threatened *** siliquosa is an ecologically and commercially vital brown alga that is uniquely distributed in the Yellow-Bohai Sea and along the southwest coast of Korea.A massive decline in its distribution range and biomass from the mid-1990s onward indicates that this species has become *** the present study,we used nuclear internal transcribed spacer and concatenated mitochondrial cytochrome oxidase I subunit+intergenic spacer to estimate the genetic diversity,population connectivity,and degree of genetic diff erentiation of *** in China and *** molecular results exhibited strikingly low levels of haplotype/ribotype and nucleotide diversity in *** populations,with only three mitochondrial haplotypes and nuclear ribotypes detected in 136 and 143 specimens,*** analysis of molecular variance revealed 85%-95%of genetic variance among *** diff erentiation coeffi cient(F_(ST))and gene fl ow(N_(m))suggested that two populations(JIN and GWA)along the southern coast of Korea are highly divergent from the others,with weak genetic *** signifi cant genetic diff erentiation was observed among populations either in China or along the geographically proximate west coast of ***,four independent management units were designated for sustainable management:the LII and RUS populations in China,the YEO and CHA populations along the west coast of Korea,and each of the GWA and JIN populations along the south coast of *** suggest that artifi cial cultivation and transplantation of *** are the eff ective approaches for restoration and conservation.

关键词： biodiversity conservation endangered seaweed genetic diversity habitat loss Silvetia siliquosa