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山西安泽青翘中总蛋白质氨基酸和微量元素分析

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中国药物与临床 2013年第3期13卷 291-293页

作者：岳晓华高丽李敏薛慧清山西中医学院实验管理中心太原030024

目的测定山西安泽青翘的总蛋白质、氨基酸、微量元素含量,对其营养价值进行评价,为综合开发利用青翘资源提供依据。方法采用凯氏定氮法测定总蛋白质,氨基酸自动分析仪测定氨基酸组分,原子吸收法测定钙(Ca),铁(Fe),锌(Zn),铜(Cu),铅(Pb)... 详细信息

目的测定山西安泽青翘的总蛋白质、氨基酸、微量元素含量,对其营养价值进行评价,为综合开发利用青翘资源提供依据。方法采用凯氏定氮法测定总蛋白质,氨基酸自动分析仪测定氨基酸组分,原子吸收法测定钙(Ca),铁(Fe),锌(Zn),铜(Cu),铅(Pb)。结果测得青翘总蛋白含量为6.87%,青翘含有17种氨基酸,氨基酸总量为6.54%,其中人体必需氨基酸总量为2.57%,占总氨基酸的39.20%。青翘含有Ca,Fe,Zn,Cu微量元素,其中Ca为2380μg/g,Fe为188μg/g,Pb未检出。结论山西安泽青翘含有较丰富的蛋白质、多种氨基酸和微量元素,为具有营养价值的保健及药用原料,具有良好的开发利用前景。

关键词：连翘氨基酸类微量元素总蛋白质

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正北芪中一种免疫活性蛋白质提取工艺的优选

中国实验方剂学杂志 2016年第5期22卷 13-17页

作者：陈秀红任晋宏魏砚明薛慧清武福云李敏梁锐山西中医学院实验管理中心山西晋中030619

目的:优选正北芪中一种免疫活性蛋白Am PR10-16(16.0 k Da)的提取工艺。方法:以正北芪中Am PR10-16的可溶性蛋白二级结构的圆二色性考察提取温度,在单因素试验基础上,以Am PR10-16在SDS-PAGE胶图中的蛋白条带吸光度(峰面积)为指标,采用L... 详细信息

目的:优选正北芪中一种免疫活性蛋白Am PR10-16(16.0 k Da)的提取工艺。方法:以正北芪中Am PR10-16的可溶性蛋白二级结构的圆二色性考察提取温度,在单因素试验基础上,以Am PR10-16在SDS-PAGE胶图中的蛋白条带吸光度(峰面积)为指标,采用L_9(3~4)正交试验考察提取温度、料液比、提取时间、提取溶剂、粒度、提取次数对Am PR10-16提取工艺的影响,辅以BCA法测定可溶性蛋白含量作为佐证。结果:Am PR10-16最佳提取工艺为药材粉末过4号筛,加16倍量p H 8.0的三羟甲基氨基甲烷盐酸盐(Tris-HCl)于40℃常压水浴提取60 min,每10 min搅拌1次。Am PR10-16提取率0.063 g·g^(-1)。结论:优化的提取工艺能正确反映Am PR10-16提取率的最高相对量,为Am PR10-16的进一步研究提供了稳定、合理、可行的提取工艺。

关键词：正北芪蛋白质蛋白质二级结构十二烷基硫酸钠-聚丙烯酰胺凝胶电泳二喹啉甲酸法

Polymorphism of CYPIAl and GSTMl genes associated with susceptibility of gastric cancer in Shandong Province of China

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World Journal of Gastroenterology 2005年第37期11卷 5757-5762页

作者： Hao Li xue-Liang Chen hui-qing Li the Center of Tumour Treatment Qilu Hospital of Shandong University Jinan 250012 Shandong Province China the Institute of Basic Medicine Shandong Academy of Medical Sciences Jinan 250062 Shandong Province China

AIM： To explore whether polymorphisms of the CYPIA1 and GSTM1 genes are associated with susceptibility of stomach cancer. METHODS： A total of 102 stomach cancer cases and 62 healthy persons were diagnosed by pathology in 1998- 2000 in the Qilu Hospital of Shandong University. Gene polymorphisms were detected by the PCR using sequencespecific primers. Data analysis of the case-control study was carried out using the unconditional logistic method. RESULTS： After adjustment for age, sex, educational levels, and occupation, the risk factors for stomach cancer were shown to be smoking, Helicobacter pylori （H pylon）, and presence of the CYPIM G/G and GSTM1O/O genotypes. Interaction was observed between the combined genotypes of either CYPIA1 G/G and GSTM1O/O or Hpyloriinfection, or GSTM1O/O and Hpyloriinfection or smoking. CONCLUSION： Polymorphisms of the CYPIA1 and GSTM1 genes, Hpyloriinfection and smoking are related to susceptibility to stomach cancer.

关键词： Stomach cancer CYPIA1 GSTM1 Polymorphism

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蛹虫草功能饮料稳定性的研究

食品安全质量检测学报 2016年第7期7卷 2914-2919页

作者：朱振元刘雪蕊孙会轻郭蓉张军天津科技大学食品工程与生物技术学院天津300457

目的研究一种可有效保持蛹虫草功能饮料稳定性的复合稳定剂配方。方法首先考察卡拉胶、琼脂、黄原胶、CMC、瓜尔豆胶和海藻酸钠6种单一稳定剂的效果,再对单一稳定剂进行复配筛选出稳定性效果好的复合稳定剂。将饮料置于37℃恒温箱进行2... 详细信息

目的研究一种可有效保持蛹虫草功能饮料稳定性的复合稳定剂配方。方法首先考察卡拉胶、琼脂、黄原胶、CMC、瓜尔豆胶和海藻酸钠6种单一稳定剂的效果,再对单一稳定剂进行复配筛选出稳定性效果好的复合稳定剂。将饮料置于37℃恒温箱进行2周的贮藏试验,确定最佳的复合稳定剂,并观察饮料贮藏期间稳定系数、贮存稳定效果和饮料粘度的变化。结果保持蛹虫草饮料稳定性的最佳复合稳定剂配方是:黄原胶与CMC按3:2比例复配,添加量为0.1%,稳定系数可达到0.981。此条件下贮藏3个月,蛹虫草功能饮料中虫草多糖、虫草酸、虫草素含量稳定。结论采用本复合稳定剂配方可用于改善蛹虫草功能饮料的稳定性。

关键词：蛹虫草功能饮料单一稳定剂复合稳定剂稳定性

Source-Free Unsupervised Domain Adaptation with Sample Transport Learning

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Journal of Computer Science & Technology 2021年第3期36卷 606-616页

作者： qing Tian Chuang Ma Feng-Yuan Zhang Shun Peng hui xue School of Computer and Software Nanjing University of Information Science and TechnologyNanjing 210044China Engineering Research Center of Digital Forensics Ministry of EducationNanjing University of Information Science and TechnologyNanjing 210044China School of Computer Science and Engineering Southeast UniversityNanjing 211189China

Unsupervised domain adaptation(UDA)has achieved great success in handling cross-domain machine learning *** typically benefits the model training of unlabeled target domain by leveraging knowledge from labeled source *** this purpose,the minimization of the marginal distribution divergence and conditional distribution divergence between the source and the target domain is widely adopted in existing ***,for the sake of privacy preservation,the source domain is usually not provided with training data but trained predictor(e.g.,classifier).This incurs the above studies infeasible because the marginal and conditional distributions of the source domain are *** this end,this article proposes a source-free UDA which jointly models domain adaptation and sample transport learning,namely Sample Transport Domain Adaptation(STDA).Specifically,STDA constructs the pseudo source domain according to the aggregated decision boundaries of multiple source classifiers made on the target ***,it refines the pseudo source domain by augmenting it through transporting those target samples with high confidence,and consequently generates labels for the target *** train the STDA model by performing domain adaptation with sample transport between the above steps in alternating manner,and eventually achieve knowledge adaptation to the target domain and attain confident labels for ***,evaluation results have validated effectiveness and superiority of the proposed method.

关键词： unsupervised domain adaptation domain shift sample transport pseudo source domain

Production of low-silicon molten iron from high-silica hematite using biochar

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Journal of Iron and Steel Research International 2017年第1期24卷 27-33页

作者： hui-qing Tang Xiu-feng Fu Yan-qi Qin Shi-yu Zhao qing-guo xue State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

A new method of utilizing high-silica hematite to produce low-silicon molten iron was *** this method,FASTMELT,which comprised direct reduction and melt separation processes,was applied,with highly reactive biochar as the reductant in the direct reduction *** proposed method was experimentally investigated and the results show that the method is *** the direct reduction stage,ore-char briquette could achieve a metallization rate of 84%-88% and residual carbon of 0.27-0.89mass% at temperature of 1373 K,biochar mixing ratio of 0.8-0.9,and reduction time of 15 *** silica particles remained embedded in the iron phase after the *** the melting separation stage,molten iron with a carbon content of 0.02-0.03mass% and silicon content of 0.02-0.18mass%could be obtained from the metallic briquettes under the above-mentioned conditions;the iron recovery rate was83%-91% and impurities in the obtained metal were negligible.

关键词： High-silica hematite Low-silicon molten iron Biochar Direct reduction Melt separation

Application of Wood Char in Processing Oolitic High-phosphorus Hematite for Phosphorus Removal

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Journal of Iron and Steel Research International 2016年第2期23卷 109-115页

作者： hui-qing TANG Yan-qi QIN Teng-fei QI Zhi-lei DONG qing-guo xue State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing

Phosphorus removal from oolitic high-phosphorus hematite using direct reduction followed by melting sep aration was investigated. At the direct reduction stage, highly volatile wood char was prepared by carbonizing jujube wood at 673 K for 2 h and was used as reducing agent. The results of the direct reduction tests show that at a tem- perature of 1373 K, a char mixing ratio of 0.8, and a reduction time of 10-25 min, the briquettes reached a metal- lization degree of 80% -84% and a residual carbon content of 0.13 -1.98 mass%. Phosphorus remained in the gangue as calcium phosphate after reduction. The results of the melting separation tests show that residual carbon in reduced briquette negatively affects the phosphorus content （W[p]） in hot metal. When the reduced briquettes ob- tained under the aforementioned conditions were used for melting separation, hot metal suitable for basic oxygen steelmaking （w[p]〈0.4 mass%） could not be obtained from metallic briquettes with a residual carbon content more than 1.0 mass~. In contrast, it could be obtained from metallic briquettes with residual carbon content less than 0.35 mass% by mixing with 2%-4% Na2CO3.

关键词： high-phosphorus hematite wood char direct reduction melting separation phosphorus removal

国内单硝酸异山梨酯联合阿司匹林治疗心绞痛的Meta分析

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临床医药文献电子杂志 2017年第60期4卷 11734-11736+11738页

作者：孙成磊刘新灵程国良薛青慧国家手性制药工程技术研究中心陕西省武功县人民医院心内科

目的通过Meta分析方法探讨单硝酸异山梨酯联合阿司匹林在国内治疗心绞痛的有效性和安全性。方法在Pubmed数据库、循证医学图书馆(Cochrane Library)、中国生物医学文献数据库(CBM)、中国期刊全文数据库(CNKI)、维普数据库、万方数据库... 详细信息

目的通过Meta分析方法探讨单硝酸异山梨酯联合阿司匹林在国内治疗心绞痛的有效性和安全性。方法在Pubmed数据库、循证医学图书馆(Cochrane Library)、中国生物医学文献数据库(CBM)、中国期刊全文数据库(CNKI)、维普数据库、万方数据库检索国内研究单硝酸异山梨酯联合阿司匹林治疗心绞痛的文献,应用Stata 12.0软件对统计数据进行Meta分析。结果符合纳入和排除标准的文章共6篇,共410名患者。Meta分析结果显示,主要以显效率作为效果指标,单硝酸异山梨酯联合阿司匹林组显著优于对照组,OR值为2.79,95%CI:1.84-4.22,差异有统计学意义(P<0.05)。不良反应方面,单硝酸异山梨酯联合阿司匹林组较少。结论临床上应推荐将单硝酸异山梨酯联合阿司匹林作为心绞痛的优势治疗方案。

关键词：单硝酸异山梨酯阿司匹林心绞痛 Meta分析

Microstructure Evolution and Precipitation Behavior of 0Cr16Ni5Mo Martensitic Stainless Steel during Tempering Process

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Journal of Iron and Steel Research International 2016年第4期23卷 401-408页

作者： Wu-hua YUAN xue-hui GONG Yong-qing SUN Jian-xiong LIANG College of Materials Science and Engineering Hunan University Special Steel Institute Central Iron and Steel Research Institute

The microstructure, morphology of precipitates and retained austenite and the volume fraction of retained austenite in 0Crl6Ni5Mo stainless steel during the tempering process were analyzed using optical microscope （OM）, transmission electron microscope （TEM）, X-ray diffraction （XRD） and scanning transmission electron microscope （STEM）. The results show that the microstructure of the tempered steel is mainly composed of tempered martensite, retained austenite, and delta ferrite. In the case of samples tempered from 500 to 700℃, the precipitates are mainly M23C6, which precipitate along the lath martensite boundaries. The precipitate content increases with the tempering temperature. During the tempering process, the content of retained austenite initially increases and then decreases, the maximum content of retained austenite being 29 vol.% upon tempering at 600℃. TEM analysis of the tested steel reveals two morphology types of retained austenite. One is thin film-like retained austenite that exists along the martensite lath boundary. The other is blocky austenite located on packet at the boundary and the original austenite grain boundary. To further understand the stability of reversed austenite, the Ni content in reversed austenite was measured using STEM. Results show a significant difference in nickel concentrations between reversed austenite and martensite.

关键词： 0Cr16Ni5Mo stainless steel microstructure evolution precipitate reversed austenite thermal stability