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Geochemical characteristics of illite clay rocks from the Shihezi Formation in the Hanxing mining area and its sedimentary environment

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Mining Science and Technology 2011年第4期21卷 495-500页

作者： xu bohui Ding Shuli Wang Yu Liu Qinfu Key laboratory of Resource Survey and Research of Hebei Province Hebei University of Engineering Handan 056038 China School of Geological Sciences China University of Mining ＆ Technology Beijing 100083 China

We studied the geochemical characteristics of illite clay rocks and their importance from the 5hihezi Formation of Late Permian in the Hanxing mining area by means of ICP-M5 and sequential X-ray fluorescence spectrometry. The results show that the amount of SiO2 is between 53.37% and 61.58% （by weight） and that of Al2O3 22.40% and 31.31% （by weight）. The ratio of SiO2/Al2O3 lies between 1.71 and 2.75. The amount of K2O ranges from 1.11% to 2.56% （by weight）. The amounts of Fe and Ti are higher than the theoretical values in illite clay rock would indicate. The amounts of some trace elements, such as Ga, As, Ba, Cu, Th and U are higher than their Clark values, while that of another 23 trace elements are found to be dose to their Clark values. The amounts of REE range from 22.59 to 570.54 μg/g, with an average of 163.23μg/g. The ratios of LREE/HREE range from 5.41 to 21.82, with an average of 8.87. These characteristics show that LREE are much richer in content than HREE. The REE distribution patterns of our samples were characterized by clearly negative Ce and Eu anomalies. We analyzed the sedimentary environment of the Hanxing mining area in Late Permian by the characteristic element ratio method. The ratios of Mn/Fe range from 0 to 0.0168, which are lower than those in a marine sedimentary environment. The ratios of Sr/Ba （0.20-0.41） are less than 1. These are all indications that the sediments of the Hanxing mining area in Late Permian form largely a continental sedimentary environment. The sedimentary water is freshwater, a conclusion reached on the basis of the ratios of Th/U （2.66-6.62） and of Ca/（Ca ＋ Fe）（0.01-0.059）; the average ratio of Fe2＋/Fe3＋ is 4.8. The sedimentary water condition is weakly acidic and weakly oxidative-weakly reductive, a conclusion reached on the basis of ratios of Fe2＋/Fe3＋（4.8） and of Ceanom （-0.08）.

关键词： Hanxing mining arealllite Trace elements Geochemical Sedimentary environment

Numerical simulation of hydrodynamic characteristics during the diversion closure in a horizontal tunnel

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International Journal of Mining Science and Technology 2013年第3期23卷 363-367页

作者： Wang Yu Du Wentang xu bohui Zhang Haiyang Yang Cuina Key Laboratory of Resource Survey and Research of Hebei Province Hebei University of Engineering School of Resource and Safety Engineering China University of Mining & Technology Department of Civil Engineering Xinxiang University

Based on water inrush accident of 1841 working face of Desheng Coal Mine in Wu'an, Hebei province, China, an evaluation model of hydrodynamic characteristics of the project is set up and simulated using Matlab. It is assumed that the pipe flow would transform into seepage flow when the aggregates are plugged into the water inrush channel and the seepage flow would disappear along with grouting process. The simulation results show that the flow velocity will increase with an increase in height of aggregates accumulation body during the aggregates filling process; the maximum seepage velocity occurs on the top of plugging zone; and the water flow decreases with increasing plugging height of water inrush channel. Finally, the field construction results show that the water inrush channel can be plugged effectively by the compacted body prepared with aggregate and cement slurry.

关键词： Hydrodynamic characteristics Numerical simulation Boundary condition Horizontal tunnel Diversion closure

The Factors on Removal of Zinc Cation from Aqueous Solution by Bentonite

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Natural Resources 2011年第2期2卷 107-113页

作者： Shuli Ding Juanjuan Shen bohui xu Qinfu Liu Yuzhuang Sun 不详

The removing zinc cation from aqueous solution by Ca-bentonite and Na-exchanged bentonite was studied. The factors such as the initial concentration of Zn2+, the liquid-to-solid ratio, pH, adsorption time, stirring speed, coexisting ions, temperature and bentonite particle size were investigated. The results show that the adsorption process of bentonite accorded with the Freundlich isotherm model, the removal of Zn2+ by Ca-bentonite and Na-exchanged bentonite reached equilibrium in 2 h, and adsorption of Na- bentonite was superior to Ca-bentonite. The adsorption rate of zinc increased with increasing pH, temperature, stirring speed, time span and with decreasing bentonite particle, the initial concentration of Zn2+ and the liquid-to-solid ratio. In mixed solution which contains Pb2+and Cr6+, Pb2+ has no influ- ence on the removal of Zn2+ by both the bentonites while Cr6+can decease it.

关键词： Bentonite Zn2+ Adsorption

The Characteristics of Mechanical Grinding on Kaolinite Structure and Thermal Behavior

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The Characteristics of Mechanical Grinding on Kaolinite Stru...

2012 International Conference on Future Energy,Environment,and Materials

作者： Shuli Ding Leilei Zhang Xiaohui Ren bohui xu Hong Zhang Fashao Ma Key Laboratory of Resources of Hebei Province Hebei University of Engineering

The relationship between kaolinite structure and the temperature of thermal transformation of phase was discussed in this paper through grinding and heating treatment. The results show that the structure of kaolinite is destroyed rapidly with increasing mechanical grinding time, and the kaolinite structure collapses completely after 1 h grinding. The temperature of thermal transformation of phase decreases with the destruction of kaolinite structure. This result has a great significance for the utilization of kaolinite associated with coal measures in China.

关键词： kaolinite mechanical grinding thermal behavior

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也谈医学生人文素质教育及其途径

锦州医学院学报（社会科学版） 2006年第4期4卷 30-32页

作者：徐伯慧辽宁医学院辽宁锦州121002

加强对医学生的人文素质教育,提高医学生的综合素质,是现代社会经济发展、医学科技进步和医学模式转变的客观要求,是高等医学教育面临的一项重要课题。医学生应具备的基本人文素质,对医学生进行人文素质教育的必要性,以及医学院校开展... 详细信息

加强对医学生的人文素质教育,提高医学生的综合素质,是现代社会经济发展、医学科技进步和医学模式转变的客观要求,是高等医学教育面临的一项重要课题。医学生应具备的基本人文素质,对医学生进行人文素质教育的必要性,以及医学院校开展人文素质教育的途径等问题,值得认真研究。

关键词：医学院校人文素质教育医学模式课程设置校园文化

紫杉醇温敏脂质体与siRNA金纳米星载药系统的构建与表征

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中国药科大学学报 2017年第4期48卷 445-452页

作者：程紫婷姚珂刘婉婉许伯慧朱红艳南通大学药学院南通226001

用种子生长法制备金纳米星(gold nanostar,GNS),构建聚乙二醇(polyethylene glycol,PEG)、氨基葡萄糖(2-amino-2-deoxy-D-glucose,DG)和九聚精氨酸(9-D-arginine,9R)修饰的载COX-2 siRNA(siCOX-2)的GNS复合纳米粒[siCOX-2(9R/DG-GNS)];以薄膜分散法制备载紫杉醇温敏脂质体(paclitaxel temperature sensitive liposome,PTX-TSL);最后将siCOX-2(9R/DG-GNS)与PTX-TSL体通过巯基配位得到PTX-TSL与siCOX-2(9R/DG-GNS)共载药系统PTX-TSL-[siCOX-2(9R/DG-GNS)]。采用核磁共振、聚丙烯酰胺凝胶电泳、紫外分光光度法、琼脂糖凝胶电泳法验证了siCOX-2(9R/DG-GNS)成功构建,马尔文电位粒度仪测得PTX-TSL-[siCOX-2(9R/DG-GNS)]粒径电位分别为(292±14)nm、-(2.59±0.12)m V,透射电子显微镜结果显示其结构呈包裹磷脂双分子层的星型,808 nm激光照射下表现出良好的光热转换效率。差示扫描量热法测试PTX-TSL相变温度约为42.6℃,透析法测得其载药量为7.5%,包封率为95.4%,具有良好的温敏释药性能。因此,本复合物纳米载药系统可作为PTX与siCOX-2的共载药体系,用以抗肿瘤耐药治疗。

关键词：紫杉醇温敏脂质体氨基葡萄糖金纳米星 siCOX-2

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温敏型黄体酮原位凝胶的制备及体外释药

中国药科大学学报 2014年第3期45卷 325-330页

作者：林佳源陈跃坚许伯慧钱伟刚李玉凤宗莉中国药科大学药剂学教研室南京210009 南京泽恒医药技术开发有限公司南京210009

以黄体酮为模型药物,泊洛沙姆407为温敏凝胶材料,制备温敏型黄体酮原位凝胶。通过单因素实验筛选保湿材料和生物黏附材料,考察处方因素对温敏凝胶胶凝温度的影响。采用自制体外释放装置,研究甘油、油酸聚乙二醇甘油酯、液体石蜡、泊洛沙... 详细信息

以黄体酮为模型药物,泊洛沙姆407为温敏凝胶材料,制备温敏型黄体酮原位凝胶。通过单因素实验筛选保湿材料和生物黏附材料,考察处方因素对温敏凝胶胶凝温度的影响。采用自制体外释放装置,研究甘油、油酸聚乙二醇甘油酯、液体石蜡、泊洛沙姆407用量和药物粒径等处方因素对温敏原位凝胶体外释药的影响,分别以零级、一级和Higuchi方程对药物的体外释放数据进行了模型拟合。实验表明,甘油的保湿效果最佳,聚卡波非的生物黏附能力最强。确定最优处方中各成分的质量分数分别为:黄体酮4.0%,泊洛沙姆407 20%,甘油5.0%,液体石蜡5.0%,油酸聚乙二醇甘油酯2.0%,聚卡波非0.2%,山梨酸0.08%,分散介质为0.1 mol/L枸橼酸磷酸盐缓冲液(pH 4.0),其胶凝温度为33.8℃。体外释放研究表明,药物粒径对药物释放影响较大,而油酸聚乙二醇甘油酯、液体石蜡、甘油和泊洛沙姆407用量对药物释放无明显影响。与普通黄体酮凝胶相比,温敏凝胶中药物释放更快,且黄体酮在温敏原位凝胶中的释药符合一级动力学特征。

关键词：黄体酮泊洛沙姆407 温敏原位凝胶胶凝温度体外释放

数字经济发展对城市蔓延的影响:基于土地利用和劳动力就业双重视角

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学习与实践 2024年第1期 76-87页

作者：温博慧邢雨聪徐佳翔天津财经大学金融学院天津300222 天津市普通高等学校社会科学实验室金融科技与风险管理实验室

数字经济已成为改变城市发展方式的新动能。以数字经济推动城市高质量发展,是解决当前城市蔓延问题的有效途径。基于我国城市面板数据的实证研究表明,数字经济对城市蔓延具有缓释作用;在考虑内生性问题、替换核心变量以及剔除直辖市样本... 详细信息

数字经济已成为改变城市发展方式的新动能。以数字经济推动城市高质量发展,是解决当前城市蔓延问题的有效途径。基于我国城市面板数据的实证研究表明,数字经济对城市蔓延具有缓释作用;在考虑内生性问题、替换核心变量以及剔除直辖市样本后,结论依然稳健。数字经济能够提高城市土地利用强度和利用效率,改善就业结构并降低劳动力错配程度,进而协同实现对城市蔓延的缓释作用。在产业结构相对合理或地方政府干预相对有效的地区,数字经济对城市蔓延的缓释效果会更加明显。此外,数字经济对城市蔓延的缓释作用在规模较大、政策强度较高、东部地区以及属于城市群的城市中更为显著。基于此,积极推动城市数字经济发展及数字化转型,缩小城市间数字经济发展差距,推动数字经济助力高质量就业,并合理引导城市空间规划,实现存量空间资源提质增效,从而缓释城市蔓延、提升城市发展质量。

关键词：数字经济城市蔓延土地利用成效劳动力就业质量产业结构

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隐晶质石墨提纯技术研究现状与展望

河北工程大学学报（自然科学版） 2017年第2期34卷 86-90页

作者：徐博会丁述理侯丹丹河北工程大学地球科学与工程学院河北邯郸056038 中国矿业大学(北京)地球科学与测绘工程学院北京100083

阐述了影响隐晶质石墨纯度的主要因素,指出石英、高岭石、伊利石、红柱石、绢云母及少量黄铁矿、电气石、褐铁矿、方解石等杂质矿物是影响隐晶质石墨纯度的主要因素。介绍了物理提纯法及化学提纯法是隐晶质石墨提纯的常用方法,分析了各... 详细信息

阐述了影响隐晶质石墨纯度的主要因素,指出石英、高岭石、伊利石、红柱石、绢云母及少量黄铁矿、电气石、褐铁矿、方解石等杂质矿物是影响隐晶质石墨纯度的主要因素。介绍了物理提纯法及化学提纯法是隐晶质石墨提纯的常用方法,分析了各种提纯方法的原理、技术特点以及存在的问题。对未来隐晶质石墨提纯技术的发展前景进行了展望,指出隐晶质石墨提纯技术将向着节能化、环保化、综合化的方向发展。

关键词：隐晶质石墨提纯方法环保与节能