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Micro-segregation and Precipitation of Alloy 690 during Isothermal Solidification:the Role of Nitrogen Content

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Journal of Materials Science & Technology 2012年第5期28卷 446-452页

作者： Rong Jiang Bo Chen Xianchao hao Yingche Ma shuo Li Kui Liu Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

The segregation and precipitation behavior of Alloy 690 containing 0.001-0.11 wt% nitrogen during isothermal solidification at 1370 and 1355 ℃ have been investigated using optical microscopy （OM）,electron probe microanalysis （EPMA） and transmission electron microscopy （TEM）.The results indicate that the volume fraction of TiN-type nitride formed during isothermal solidification increases with the nitrogen content of Alloy *** of Ti and Cr exists in samples solidified at 1370 and 1355℃.The Ti content in the residual liquid markedly decreases and the concentration of Cr increases when the nitrogen content of Alloy 690 ***,N and S also show segregation to some extent in the residual liquids at 1355℃.Accompanying by the segregation of Cr,Ti,C,N and S,sulfides and chromium nitrides *** a low nitrogen content Alloy 690,sulfur segregates and precipitates in the form of Ti 4 C 2 S 2 and （Cr,Ti）S,but in the form of （Cr,Ti）S or CrS in a high nitrogen content Alloy 690.（Cr,Ti）N-type nitrides with an fcc crystal structure have been identified in a sample with 0.11 wt% nitrogen.

关键词： Alloy 690 Nitrogen content Solidification Micro-segregation Precipitate

Nomogram predicting the cardiovascular disease mortality for older patients with colorectal cancer:A real-world population-based study

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World Journal of Cardiology 2024年第8期16卷 458-468页

作者： Jia-Yu Tan shuo-hao Shen Department of Medical Ultrasound The First Affiliated Hospital of Shandong First Medical University&Shandong Provincial Qianfoshan HospitalJinan 250000Shandong ProvinceChina Department of General Surgery Qilu Hospital of Shandong UniversityJinan 250000Shandong ProvinceChina

BACKGROUND Cardio-oncology has received increasing attention especially among older patients with colorectal cancer(CRC).Cardiovascular disease(CVD)-specific mortality is the second-most frequent cause of *** risk factors for CVDspecific mortality among older patients with CRC are still poorly *** To identify the prognostic factors and construct a nomogram-based model to predict the CVD-specific mortality among older patients with *** The data on older patients diagnosed with CRC were retrieved from The Surveillance,Epidemiology,and End Results database from 2004 to *** prognostic factors and a nomogram-based model predicting the CVD-specific mortality were assessed using least absolute shrinkage and selection operator and Cox *** A total of 141251 eligible patients with CRC were enrolled,of which 41459 patients died of CRC and 12651 patients died of *** age at diagnosis,sex,marital status,year of diagnosis,surgery,and chemotherapy were independent prognostic factors associated with CVD-specific mortality among older patients with *** used these variables to develop a model to predict CVD-specific *** calibration curves for CVD-specific mortality probabilities showed that the model was in good agreement with actual *** C-index value of the model in the training cohort and testing cohort for predicting CVD-specific mortality was 0.728 and 0.734,*** The proposed nomogram-based model for CVD-specific mortality can be used for accurate prognostic prediction among older patients with *** model is a potentially useful tool for clinicians to identify high-risk patients and develop personalized treatment plans.

关键词： Older patients Colorectal cancer Cardio-oncology Nomogram Outcome

Holocene thermal maximum mode versus the continuous warming mode:Problems of data-model comparisons and future research prospects

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Science China Earth Sciences 2023年第8期66卷 1683-1701页

作者： Fahu CHEN Yanwu DUAN shuo hao Jie CHEN Xiaoping FENG Juzhi HOU Xianyong CAO Xu ZHANG Tianjun ZHOU Group of Alpine Paleoecology and Human Adaptation(ALPHA) Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Tibetan Plateau Earth System Resources and Environment(TPESRE)Institute of Tibetan Plateau ResearchChinese Academy of SciencesBeijing 100101China College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100049China College of Atmospheric Sciences Lanzhou UniversityLanzhou 730000China Institute of Atmospheric Physics Chinese Academy of SciencesBeijing 100029China

The Holocene,the most recent interglacial,provides an important time window for evaluating current global warming and predicting future temperature *** the development of new temperature proxies and improvements in climate models,significant progress has been made in understanding Holocene temperature ***,a major debate persists about whether global temperatures during the Holocene followed a pattern of gradual warming from the end of the Last Glacial Maximum,which culminated in a temperature maximum in the early to middle Holocene,followed by gradual cooling in the late Holocene(the thermal maximum mode);or whether there was a continuous warming trend that continued to the present day(the continuous warming mode).Significant discrepancies exist between different proxy records as well as between proxy records and models,which have resulted in the “Holocene temperature conundrum” that has challenged paleoclimatologists for the past ***,we summarize the progress made to date in the study of Holocene temperature change via proxy reconstructions,climate model simulations,and paleoclimate data *** emphasize that the current research has limitations in terms of the multiplicity and seasonality of proxy records,the spatial heterogeneity of temperature records,and the incorporation of feedback processes(e.g.,vegetation,cloudradiation feedback) in climate *** limitations have hindered a comprehensive understanding of the processes and mechanisms of Holocene temperature *** solve the “Holocene temperature conundrum”,it is necessary to strengthen theoretical research on climate proxies from the perspective of the underlying processes and mechanisms,elucidate the seasonal response of various temperature proxies,emphasize regional differences in temperature changes,and expand quantitative temperature reconstructions to areas with limited ***,it is also necessary to improve the simulation performance of complex

关键词： Holocene temperature change Thermal maximum mode Continuous warming mode Seasonality of proxies Climate simulations

Degradation Behavior of Ti-6Al-4V Alloys for Dental Applications in Acidic Artificial Saliva Containing Fluoride Ion

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Journal of Wuhan University of Technology(Materials Science) 2017年第4期32卷 926-934页

作者：杨丽霞 hao shuo ZHU Qiliang XIA Dahai WANG Junxia ZHANG Junfeng MA Jingzhi WEI wei School of Material and Chemistry China University of Geosciences Tianjin Key Laboratory of Composite and Functional Materials School of Materials Science and Engineering Tianjin University Department of Stomatology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology

The aim of this work was to study the degradation behavior of Ti-6Al-4V alloys for dental applications in acidic artificial saliva with fluoride ion using electrochemical techniques, optical microscopy, scanning electron microscopy（SEM）, and energy dispersive spectrometry（EDS）. The experimental results showed that fluoride ion had significant influence on the degradation of Ti-6Al-4V alloys, and there was an obvious critical concentration of fluoride ion（about 0.1wt%）. With increasing fluoride ion concentration, the corrosion potential（Ecorr） of alloys moved toward negative and the impedance of alloys decreased, meanwhile, noticeable transformation from minimum corrosion to severe pitting corrosion was observed on alloys surface following the dissolution of TiO2 passive films, leading to the decrease of the corrosion resistance of alloys. The electrochemical dissolution of TiO2 passive films involved a nucleophilic attack of fluoride atom to the titanium atom of TiO2. In addition, Ca^（2＋）and Na~＋ in acidic saliva may involve the surface reactions and make the reactions more complex.

关键词： alloy corrosion scanning electron microscopy(SEM) passive films

Purification and Characterization of a Proteolytic Enzyme from Fig Latex

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Chemical Research in Chinese Universities 2008年第3期24卷 348-352页

作者： HUANG Lu QU He-zhi ZHANG Lei DU Shan-shan YANG shuo hao Dong-yun WANG Xiao-ping Key Laboratory of Molecular Enzymology ＆ Engineering of Ministry of Educational Jilin University Changehun 130021 P. R. China

Ficin is an important component of plants in Ficus family such as fig latex. It is of special significance in medicine and industry because it exhibits activity throughout a wide range of temperature and pH values. In this work, we purified a component of ficin from the latex homogeneity of Shandong fig trees, and the properties of the purified ficin were studied. The current findings revealed that heavy metal ions were able to inhibit ficin, while DTT, L-cysteine, and β-ME were found to promote ficin activity. It was also observed that the half life of ficin at 65 °C was longer than 1 h and the Michaelis constant（Km） for casein hydrolyzation was determined to be 1.56 mg/mL. Our study shows that this purified ficin is a cysteine protease.

关键词： Protease Fig-tree latex Ficin Purification Characterization

Acupuncture-based treatments on cervical spondylosis of vertebral artery type

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TMR Non-Drug Therapy 2021年第1期4卷 3-9页

作者： Juan-Juan Mao Bo-Yu Zhu hao-shuo Wang Tianjin University of Traditional Chinese Medicine Tianjin 301617China.

Cervical spondylosis of vertebral artery type is one of the chief patterns of cervical *** is often described as neck pain accompanied with radiating pain and neurologic symptoms,such as sudden dizziness,blurred vision,tinnitus,nausea,vomiting,memory loss,and sudden *** incidence of cervical spondylosis increases and patients with cervical spondylosis become progressively *** in the cervical spondylosis of vertebral artery type treatment has a local positive reaction“Liuhe point”,in order to dredge the local Qi and *** and more evidences into the effectiveness and safety of cervical spine acupuncture for cervical spondylosis,specific neck pain,cervical radiculopathy,*** article summarizes the recent literature on acupuncture and acupuncture combined with other therapies for cervical spondylosis of vertebral artery type treatment and provides a comprehensive review from the perspectives of acupuncture therapy,warm needle moxibustion therapy,electroacupuncture,and acupuncture combined with other therapies,in order to provide reference and reference for clinical treatment.

关键词： Cervical spondylosis Cervical spondylosis of vertebral artery type Traditional non-drug therapy Acupuncture Research progress

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稻秸增强酚醛泡沫保温材料的制备与性能

复合材料学报 2023年第10期40卷 5630-5640页

作者：郝硕谢浩李爽王伟宏东北林业大学生物质材料科学与技术教育部重点实验室哈尔滨150040

将水稻秸秆与酚醛树脂(PF)泡沫复合,改进PF泡沫本身脆性大、力学强度低的问题。探究稻秸长度(8 cm、12 cm和16 cm)、形态(横切秸秆段、斜切秸秆段、搓碾成丝)对复合材料物理性质、力学及燃烧性能的影响。结果表明,稻秸内外表面与PF泡沫... 详细信息

将水稻秸秆与酚醛树脂(PF)泡沫复合,改进PF泡沫本身脆性大、力学强度低的问题。探究稻秸长度(8 cm、12 cm和16 cm)、形态(横切秸秆段、斜切秸秆段、搓碾成丝)对复合材料物理性质、力学及燃烧性能的影响。结果表明,稻秸内外表面与PF泡沫基体产生明显机械啮合;稻秸/PF泡沫复合材料的弯曲强度、压缩强度与垂直于板面的抗拉强度均优于PF泡沫;16 cm斜切处理稻秸/PF泡沫复合材料弯曲强度达到1.18 MPa,较PF泡沫提高195.3%;16 cm搓碾处理稻秸/PF泡沫复合材料在应变为10%时的压缩应力和垂直于板面的抗拉强度分别为251.30 kPa与121.26 kPa,较PF分别提高了112.1%和20.7%。垂直燃烧与极限氧指数(LOI)测试结果表明,PF泡沫对稻秸表现出较好的包覆作用,复合材料整体热稳定性与PF泡沫几乎持平,LOI值几乎无变化,稻秸/PF泡沫复合材料和PF泡沫可燃性测试结果均达到B1级建筑材料要求,具有良好的阻燃性能。8 cm斜切处理稻秸增强PF泡沫复合材料综合力学性能最优。

关键词：酚醛泡沫水稻秸秆导热系数力学强度燃烧性能

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基于成本核算的废旧动力电池回收模式分析与趋势研究

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中国环境科学 2021年第10期41卷 4745-4755页

作者：郝硕硕董庆银李金惠清华大学环境学院北京100084

概述了动力电池流向、回收管理体系和回收模式等管理现状,总结提出了以新能源汽车生产企业、动力电池生产企业、第三方综合利用企业和产业联盟为回收主体的四种动力电池回收模式;考虑建设成本、运行维护成本、收集成本、贮存成本、运输... 详细信息

概述了动力电池流向、回收管理体系和回收模式等管理现状,总结提出了以新能源汽车生产企业、动力电池生产企业、第三方综合利用企业和产业联盟为回收主体的四种动力电池回收模式;考虑建设成本、运行维护成本、收集成本、贮存成本、运输成本、人工成本、税收成本、管理成本等8个构成要素,构建了废旧动力电池回收成本模型;核算了四种回收模式的废旧动力电池回收成本和利润情况.核算数据显示,回收1万t/a的废旧动力电池项目,在年总收益均为8500万元的条件下,四种回收模式的利润区间为-461~401万元.结果与趋势分析表明,我国可优先推广新能源汽车生产企业为回收主体的回收模式,便于迅速布局;市场成熟后以动力电池生产企业和综合利用企业为回收主体的模式将进入市场,专业性和技术性将大幅提升;当市场更加成熟,以产业联盟为主体的回收模式将更具优势,回收成本降到最低.综上,建议从避免重复建设,缩短资金周转周期,探索创新模式,构建绿色供应链以及完善回收法律体系等方面入手,进一步完善我国废旧动力电池回收体系.

关键词：新能源汽车动力电池回收模式成本模型趋势

Impact of neoadjuvant chemoradiotherapy on the local recurrence and distant metastasis pattern of locally advanced rectal cancer: a propensity score-matched analysis

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Chinese Medical Journal 2021年第18期134卷 2196-2204页

作者： Liang Yu Tian-Lei Xu Lin Zhang shuo-hao Shen Yue-Lu Zhu Hui Fang Hai-Zeng Zhang Department of Colorectal Surgery National Cancer Centre/National Clinical Research Centre for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China State Key Lab of Molecular Oncology National Cancer Centre/National Clinical Research Centre for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Pathology National Cancer Centre/National Clinical Research Centre for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Department of Radiation Oncology National Cancer Centre/National Clinical Research Centre for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China

Background:Previous studies have demonstrated different predominant sites of distant metastasis between patients with and without neoadjuvant chemoradiotherapy(NCRT).This study aimed to explore whether NCRT could influence the metastasis pattern of rectal cancer through a propensity score-matched ***:In total,1296 patients with NCRT or post-operative chemoradiotherapy(PCRT)were enrolled in this study between January 2008 and December *** score matching was used to correct for differences in baseline characteristics between the two *** propensity score matching,the metastasis pattern,including metastasis sites and timing,was compared and ***:After propensity score matching,there were 408 patients in the PCRT group and 245 patients in the NCRT *** significantly reduced local recurrence(4.1%vs.10.3%,P=0.004),but not distant metastases(28.2%vs.27.9%,P=0.924)compared with *** both the NCRT and PCRT groups,the most common metastasis site was the lung,followed by the *** NCRT group developed local recurrence and distant metastases later than the PCRT group(median time:29.2[18.8,52.0]months vs.18.7[13.3,30.0]months,Z=–2.342,P=0.019;and 21.2[12.2,33.8]vs.16.4[9.3,27.9]months,Z=–1.765,P=0.035,respectively).The distant metastases occurred mainly in the 2nd year after surgery in both the PCRT group(39/114,34.2%)and NCRT group(21/69,30.4%).However,20.3%(14/69)of the distant metastases appeared in the 3rd year in the NCRT group,while this number was only 13.2%(15/114)in the PCRT ***:The predominant site of distant metastases was the lung,followed by the liver,for both the NCRT group and PCRT *** did not influence the predominant site of distant metastases,but the NCRT group developed local recurrence and distant metastases later than the PCRT *** follow-up strategy for patients with NCRT should be adjusted and a longer intensive follow-up is needed.

关键词： Locally advanced rectal cancer Metastases pattern Neoadjuvant chemoradiotherapy Propensity score matching