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环境工程技术学报 2017年第1期7卷 1-6页

作者：崔晓宇单永平曾萍何绪文中国矿业大学(北京)化学与环境工程学院北京100083 中国环境科学研究院城市水环境科技创新基地北京100012 德国亥姆霍兹环境研究中心环境微生物学院莱比锡04318

通过多批次的小试试验考察了结晶沉淀-树脂吸附组合工艺对黄连素含铜废水的处理效果,并对产生的碱式氯化铜(TBCC)结晶沉淀进行X射线衍射(XRD)成分分析。结果表明:反应pH为7.0~9.0时,废水中超过99.9%的Cu^(2+)以碱式氯化铜结晶沉淀的形... 详细信息

通过多批次的小试试验考察了结晶沉淀-树脂吸附组合工艺对黄连素含铜废水的处理效果,并对产生的碱式氯化铜(TBCC)结晶沉淀进行X射线衍射(XRD)成分分析。结果表明:反应pH为7.0~9.0时,废水中超过99.9%的Cu^(2+)以碱式氯化铜结晶沉淀的形式得以回收,反应生成的碱式氯化铜沉淀通过水洗后,其成分符合GB/T 21696—2008《饲料添加剂碱式氯化铜》质量标准。剩余的废水再经过树脂吸附工艺处理后,出水Cu^(2+)浓度小于1.0 mg/L。在小试试验的基础上,开展了中试试验研究,其结果进一步验证了小试试验的运行效果及该工艺的可行性。通过该处理工艺既可综合利用废水中的铜资源,又可将废水的pH由小于1调至大于7,有利于实现制药废水综合处理和达标排放。

关键词：碱式氯化铜沉淀树脂吸附铜回收中试

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重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用对深Ⅱ度烧伤的影响

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中国美容整形外科杂志 2022年第7期33卷 413-416,434页

作者：李亮王旭文何丽彩李双蔺利剑赵龙刚李雯河北中石油中心医院整形手外烧伤科河北廊坊065000 廊坊永清康定精神病医院河北廊坊065600

目的观察重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用对深Ⅱ度烧伤患者的影响。方法选取2019年6月至2020年5月河北中石油中心医院整形手外烧伤科治疗的120例深Ⅱ度烧伤患者为研究对象,采用随机数字表法对患者分组:对照组1... 详细信息

目的观察重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用对深Ⅱ度烧伤患者的影响。方法选取2019年6月至2020年5月河北中石油中心医院整形手外烧伤科治疗的120例深Ⅱ度烧伤患者为研究对象,采用随机数字表法对患者分组:对照组1、对照组2、观察组,每组40例患者。对照组1采用削痂术联合重组人酸性成纤维细胞生长因子治疗,对照组2采用削痂术联合夫西地酸乳膏治疗,观察组采用削痂术联合重组人酸性成纤维细胞生长因子和夫西地酸乳膏治疗,3组患者均连续治疗至创面愈合。治疗前、治疗第20天测量白细胞介素-2(interleukin-2, IL-2)、肿瘤坏死因子-α(tumor necrosis factor-α, TNF-α)、白细胞介素-10(Interleukin-10, IL-10)、白细胞介素-6(interleukin-6, IL-6)、血管内皮生长因子(vascular endothelial growth factor, VEGF)、表皮细胞生长因子(epidermal cell growth factor, EGF)、金属蛋白酶组织抑制因子1(tissue inhibitor of metalloproteinase 1, TIMP-1)、转化生长因子β1(transforming growth factor β1, TGF-β1)水平,观察患者创面愈合时间,采用温哥华瘢痕量表(vancouver scar scale, VSS)评价3组患者瘢痕增生程度,记录患者不良反应情况。结果观察组TNF-α、IL-6水平低于对照组1和对照组2(P<0.05),观察组IL-2、IL-10水平高于对照组1和对照组2(P<0.05),观察组VEGF、EGF、TIMP-1、TGF-β1水平高于对照组1和对照组2(P<0.05),治疗第10、15、20天,3组创面愈合率升高(P<0.05),观察组创面愈合率高于对照组1和对照组2(P<0.05),观察组创面愈合平均时间低于对照组1和对照组2(P<0.05),观察组瘢痕血管分布、颜色、厚度和柔软度评分低于对照组1和对照组2(P<0.05),3组均无明显不良反应发生。结论重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用治疗深Ⅱ度烧伤患者,可降低促炎因子TNF-α、IL-6水平,提升抑炎因子IL-2、IL-10水平,抑制炎症,提升VEGF、EGF、TIMP-1、TGF-β1水平,提升创面愈合率,降低瘢痕增生,安全性较高。

关键词：重组人酸性成纤维细胞生长因子夫西地酸乳膏深Ⅱ度烧伤创面愈合瘢痕增生

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Medium-temperature furnace baking of 1.3 GHz 9-cell superconducting cavities at IheP

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SUPERCONDUCTOR SCIENCE & TECHNOLOGY 2021年第9期34卷 095005-095005页

作者： he, Feisi Pan, Weimin Sha, Peng Zhai, Jiyuan Mi, Zhenghui Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui Du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Chinese Acad Sci Inst High Energy Phys Beijing 100049 Peoples R China Chinese Acad Sci Inst High Energy Phys Key Lab Particle Accelerat Phys & Technol Beijing 100049 Peoples R China Chinese Acad Sci Ctr Superconducting RF & Cryogen Inst High Energy Phys Beijing 100049 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Recently, heat treatment in the range of 250 degrees C-500 degrees C has been attempted with the aim of improving the quality factor (Q) of superconducting radio-frequency (SRF) cavities worldwide. herein, medium-temperature (mid-T) furnace baking experiments were conducted at the Institute of High Energy Physics to obtain higher Q values. First, 1.3 GHz 1-cell cavities received mid-T furnace baking at different temperatures, resulting in not only the improvement of Q but also an anti-Q-slope behavior. Furthermore, mid-T furnace baking was applied to six 1.3 GHz 9-cell cavities, all of which indicated higher Q and anti-Q-slope behavior. The average Q was 3.8 x 10(10) at 16 MV m(-1). The maximum gradients of the 9-cell cavities were 22.7-26.5 MV m(-1). Finally, the mid-T furnace baked 1.3 GHz 9-cell cavities were welded with helium vessel, with no degradation in the vertical tests. In addition, the mid-T furnace baking process was simplified in comparison with European X-ray Free Electron Laser and Linear Coherent Light Source because of the cancellation of light electro-polishing. This simplification is beneficial in the mass production of SRF cavities with high Q, which are widely adopted in free electron lasers and high-energy colliders.

关键词： superconducting cavity quality factor gradient medium-temperature furnace baking vertical test

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Stress and optical constants in thin films of BaF₂-PrF₃: A potential Th-free infrared low-index evaporation material

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OPTIK 2018年 173卷 174-179页

作者： Lva, xuwen Zheng, Weimin Xie, Ping Li, Bin he, Weixiang Jing, Chao Liu, Dingquan Shanghai Univ Dept Phys Shanghai 200444 Peoples R China Shandong Univ Sch Space Sci & Phys Weihai 264209 Peoples R China Chinese Acad Sci Shanghai Inst Tech Phys Shanghai 200083 Peoples R China Shanghai Tech Univ Sch Phys Sci & Technol Shanghai 200031 Peoples R China

Although PrF3 can be regarded as a potential infrared low-index evaporation material used in infrared antireflection to substitute for radioactive ThF4 because its thin films have a good transparency, the lower refractive index n and extinction coefficient k in the spectral range of thermal infrared, the greater tensile stress emerging in its layers will deteriorate the reliability and durability of antireflection coatings. In our investigation, BaF2-PrF3 thin films were deposited using electron beam evaporation from the sintered pellets of PrF3 admixed with BaF2. Stress in thin films was calculated from Stoney's equation on the basis of measuring the changes of radius of curvature of thin silicon strips. The stoichiometry of thin films was determined using the energy dispersive X-ray analysis (EDX). The optical constants of thin films were determined by fitting the measured spectral transmittance curves using Lorentz oscillators as a dispersion model. It can be observed that stress in BaF2-PrF3 thin films is obviously reduced with the increasing of the concentration of BaF2 in thin films and the sintered pellets. Moreover, it was also demonstrated that incorporation of BaF2 into PrF3 can reduce the refractive index of thin films, although BaF2-PrF3 thin films have a greater dispersion than that of PrF3 thin films. In addition, the lower value of extinction coefficient is also presented in thin films, like those of rare-earth fluorides.

关键词： Antireflection coatings Infrared Praseodymium fluoride Barium fluoride Electron beam evaporation Stress Optical constant

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Parasitic modes suppression in CW cold tests of 1.3 GHz 9-cell high Q cavities at IheP

arXiv

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arXiv 2021年

作者： Mi, Zhenghui he, Feisi Pan, Weimin Sha, Peng Zhai, Jiyuan Dai, xuwen Jin, Song Zhang, Zhanjun Dong, Chao Liu, Baiqi Zhao, Hui Ge, Rui Zhao, Jianbing Mu, Zhihui Du, Lei Sun, Liangrui Zhang, Liang Yang, Conglai Zheng, Xiaobing Lin, Haiying Wang, Guangwei he, Xiangcong Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Key Laboratory of Particle Acceleration Physics & Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Center for Superconducting RF and Cryogenics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China University of Chinese Academy of Sciences Beijing100049 China

The CW RF test of 1.3 GHz 9-cell cavity in liquid helium bath at 2 K is a very important key point in the cavity procurement. Some problems can be found through the test, according which to optimized and improve the process of cavity. Recently, Medium temperature (mid-T) furnace bake of 1.3 GHz 9-cell cavities have been carried out at IheP. Through the proceed of mid-T bake, the quality factor of cavity has been greatly improved. While the excitation of the parasitic modes in the high Q cavities CW cold test has been encountered, which implies an error source for the cavity gradient and quality factor determination. In order to ensure the testing accuracy of superconducting cavity, we have improved the testing system. Finally, the parasitic mode is completely suppressed and the CW RF cold test of high Q cavity is guaranteed. © 2021, CC BY.

关键词： Superfluid helium

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Adsorption of PAHs on the Sediments from the Yellow River Delta as a Function of Particle Size and Salinity

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SOIL & SEDIMENT CONTAMINATION 2015年第2期24卷 103-115页

作者： Wang, Jianbing Wang, Can Huang, Qiuying Ding, Feng he, xuwen China Univ Min & Technol Sch Chem & Environm Engn Beijing 100083 Peoples R China Henan Polytech Inst Dept Chem Engn Nanyang Peoples R China Minist Environm Protect Appraisal Ctr Environm & Engn Beijing Peoples R China

In a seawater environment, the particle size of sediment and salinity play an important role in the adsorption behaviors of polycyclic aromatic hydrocarbons (PAHs) on sediment. In this study, batch adsorption experiments were carried out with the sediments from the Yellow River Delta (YRD) to explore the effect of particle size and salinity on the adsorption behaviors of phenanthrene (Phe), fluoranthene (Fla), and pyrene (Pyr). Adsorption isotherms of PAHs on different-sized sediments can be described by a Freundlich model with the correlation coefficients ranging from 0.96 to 0.99. The adsorption capacity of PAHs was in reverse proportion to the particle size of the sediments and in direct proportion to salinity. The sediments with smaller particle size possessed higher content of aromatic and fat components, which had strong adsorption capacity toward PAHs. Salinity influenced the adsorption behaviors of PAHs by changing the solubility of PAHs and the physicochemical properties of the sediments. The salting-out constants of Phe, Fla, and Pyr were in the range of 0.292 to 0.296, 0.230 to 0.289, and 0.293 to 0.307 l/mol, respectively. These research findings are of importance to an assessment of the fate and transport of PAHs in seawater-sediment systems.

关键词： fate and transport fluoranthene pyrene Phenanthrene

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基于SDN/NFV的星地融合网络切片

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移动通信 2020年第9期44卷 34-39页

作者：贺晓赫侯缋玲梁旭文上海科技大学上海201210 中国科学院大学北京100049 上海微小卫星工程中心上海201210

低轨卫星通信与地面5G的融合是大势所趋,网络切片技术针对星地融合网络中多种多样的应用服务可以端到端地分配不同的计算资源和带宽,提高网络灵活性和扩展性,应用前景广阔。针对融合网络切片面临的的主要问题进行探讨,包括卫星地面段虚... 详细信息

低轨卫星通信与地面5G的融合是大势所趋,网络切片技术针对星地融合网络中多种多样的应用服务可以端到端地分配不同的计算资源和带宽,提高网络灵活性和扩展性,应用前景广阔。针对融合网络切片面临的的主要问题进行探讨,包括卫星地面段虚拟化、虚拟网络嵌入、业务功能链和融合网络切片等,提出了一些解决方案,并对基于SDN/NFV的星地融合网络切片发展趋势和前景做出展望。

关键词： SDN NFV 星地融合网络切片

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StraPep: a structure database of bioactive peptides

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DATABASE-The JOURNAL OF BIOLOGICAL DATABASES AND CURATION 2018年第2018期2018卷 1-N.PAG页

作者： Wang, Jian Yin, Tailang Xiao, xuwen he, Dan Xue, Zhidong Jiang, Xinnong Wang, Yan Huazhong Univ Sci & Technol Coll Life Sci & Technol Key Lab Mol Biophys Minist Educ Wuhan 430074 Hubei Peoples R China Wuhan Univ Renmin Hosp Reprod Med Ctr Wuhan 430060 Hubei Peoples R China Huazhong Univ Sci & Technol Sch Software Engn Wuhan 430074 Hubei Peoples R China Sun Yat Sen Univ Affiliated Hosp 1 Dept Neurol Guangzhou 510080 Guangdong Peoples R China

Bioactive peptides, with a variety of biological activities and wide distribution in nature, have attracted great research interest in biological and medical fields, especially in pharmaceutical industry. The structural information of bioactive peptide is important for the development of peptide-based drugs. Many databases have been developed cataloguing bioactive peptides. However, to our knowledge, database dedicated to collect all the bioactive peptides with known structure is not available yet. Thus, we developed StraPep, a structure database of bioactive peptides. StraPep holds 3791 bioactive peptide structures, which belong to 1312 unique bioactive peptide sequences. About 905 out of 1312 (68%) bioactive peptides in StraPep contain disulfide bonds, which is significantly higher than that (21%) of PDB. Interestingly, 150 out of 616 (24%) bioactive peptides with three or more disulfide bonds form a structural motif known as cystine knot, which confers considerable structural stability on proteins and is an attractive scaffold for drug design. Detailed information of each peptide, including the experimental structure, the location of disulfide bonds, secondary structure, classification, post-translational modification and so on, has been provided. A wide range of user-friendly tools, such as browsing, sequence and structure-based searching and so on, has been incorporated into StraPep. We hope that this database will be helpful for the research community.

关键词： MOLECULAR structure of peptides BIOLOGICAL databases PROTEIN stability

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Biological functional analysis of Chinese herbal medicines against wind-cold-dampness syndrome

Biological functional analysis of Chinese herbal medicines a...

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International Conference on Fuzzy Systems and Knowledge Discovery (FSKD)

作者： Guang Zheng Yanjing Zhang he Zhang Miaofeng Li xuwen he Yutao Qi Junping Zhan Hongtao Guo School of Information Science & Engineering Lanzhou University Lanzhou P.R. China The second affiliated hospital of Henan University of TCM Zhengzhou P.R. China The first affiliated hospital of Henan University of TCM Zhengzhou P.R. China

ISBN: (纸本)9781509040940

Syndrome wind-cold-dampness in traditional Chinese medicine (TCM) can be referred to diseases of osteoarthritis, rheumatoid arthritis, cervical spondylitis, and spondylitis and so on. Over thousand years TCM clinical explorations, this syndrome can be treated with a group of herbal medicines in TCM. However, their molecular level biological functions are still not clear. In this study, a set of algorithms e.g., hypergeometric distribution, Jaccard index, and recursive programming for hierarchy network were deployed in the context gene/protein functional similarity and enrichment analysis. The analysis was mainly focused on the associated herbal medicines, their chemical compounds, target proteins' similarity, and gene ontology terms' hierarchical network overrepresentation through the enrichment analysis of hypergeometric distribution with P-value set to 0.05. As a result, these associated herbs share low level (

关键词： Proteins Biological processes Medical diagnostic imaging Chemical compounds Chemicals Indexes

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Facile synthesis of 3D N-doped porous carbon nanosheets as highly active electrocatalysts toward the reduction of hydrogen peroxide

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NANOSCALE 2018年第31期10卷 14923-14930页

作者： Lu, Nannan Zhang, Tingting Yan, Xiaoyi Gu, Yue Liu, he Xu, Zhiqian Xu, Haixin Li, xuwen Zhang, Zhiquan Yang, Ming Jilin Univ Coll Chem Changchun 130012 Jilin Peoples R China Jilin Univ Hosp 1 Dept Breast Surg Changchun 130012 Jilin Peoples R China

Constructing three-dimensional (3D) conductive frameworks with high specific surface areas and porous structures is indispensable for their applications as electrocatalysts. In this work, we illustrate for the first time that 3D N-doped porous carbon nanosheets (3D-NS), which are synthesized via a facile one-pot pyrolysis reaction using glucose and melamine as raw materials, can serve as high performance and green electrocatalysts for the reduction of H2O2. Moreover, a series of 3D-NS samples with a controllable content of nitrogen were obtained by adjusting the calcination temperature. From our research, the 3D-NS obtained at 900 degrees C possessed high specific surface areas, porous structures, proper dosages of N atoms, suitable degrees of graphitization and defects. Furthermore, we also illustrate their application in H2O2 electrochemical sensing in physiological environments. Under optimum conditions, the 3D-NS-based sensor displays a wide linear scope in the range of 0.5-14 000 mu M and a low detection limit of 0.18 mu M (S/N = 3). Therefore, with desirable selectivity, stability and anti-interference performance, the proposed sensor can be feasibly applied to detect H2O2 in human serum samples.

关键词： Electrocatalysts

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