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Nano Research 2024年第4期17卷 3398-3406页

作者： Yucheng Song Huanhuan Tan shiliang qin Zhong Liu Chuntai Liu Changyu Shen Peipei Yang Songwei Li National Engineering Research Center for Advanced Polymer Processing Technology Key Laboratory of Materials Processing and Mold(Ministry of Education)Zhengzhou UniversityZhengzhou 450002China Key Laboratory of Comprehensive and Highly Efficient Utilization of Salt Lake Resources Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt LakesQinghai Institute of Salt LakesChinese Academy of SciencesXining 810008China

Efficient and selective extraction of uranium(U(VI))from seawater is essential for sustainable nuclear power *** study reports a novel adsorbent zeolitic imidazolate framework(ZIF)-67@SiO_(2)-A/polyacrylamide(PAM)which was synthesized by grafting the core–shell metal–organic frameworks(MOFs)-based nanostructures coated with the 3-aminopropyl triethoxysilane(APTES)functionalized SiO_(2)(SiO_(2)-A)onto PAM *** SiO_(2) shell was grown on the surface of MOF,which improved the acid-base resistance of *** introduction of ZIF-67@SiO_(2)-A enhances the specific surface area and adsorption efficiency of the *** ZIF-67@SiO_(2)-A/PAM shows remarkable adsorption capacity,fast adsorption kinetics,and good reusability for *** has excellent adsorption property(6.33 mg·g^(-1),30 d)in natural *** X-ray photoelectron spectroscopy(XPS),Fourier transform infrared(FTIR),energy dispersive spectroscopy(EDS)mappings,and density functional theory reveal that the coordination by N and O in ZIF-67@SiO_(2)-A/PAM with uranium is the main mechanism of uranium ***,ZIF-67@SiO_(2)-A/PAM has great potential to capture uranium from natural seawater.

关键词： hydrogel metal–organic frameworks core–shelled nanostructures uranium extraction from seawater

Utilization of recycled solid waste as ecological reclamation materials based on plant growth experiments and soil quality analysis

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Journal of Mountain Science 2024年第3期21卷 820-834页

作者： qin Xiaochun NI Anchen YANG Dongxiao XING Wenhu LIU shiliang College of Civil Engineering Beijing Jiaotong UniversityBeijing 100044China Shanxi Road&Bridge Construction Group Co. LtdShanxi 030006China School of Environment Beijing Normal UniversityBeijing 111875China

During the highway construction,a large number of spoil areas will be generated while a large amount of waste slag and soil could not be rationally ***,the vegetation recovery is slow in the spoil areas due to the soil *** at recycling the solid waste,the sieved engineering waste slag with local red clay and corn straw biochar was supplied to solve the problem of insufficient nutrients in engineering waste slag and *** addition,planting experiments of alfalfa(Medicago sativa L.)and Amorpha fruticosa *** with physical and chemical experiments were carried out to prove the feasibility of the novel improved substrate for the reclamation of spoil *** results show that the substrate's improvement effect is mainly affected by the soil to slag ratio and the biochar *** improvement effect of soil matrix in highway spoil area decreases with the increase of the waste slag content,especially when the soil-slag ratio is less than 3,and the promotion of plants is *** the contrary,the improvement effect is proportional to the biochar content(3%-8%).But it is noted that the Cu and Pb in the soil will exceed the clean limit corresponding to the Nemero soil pollution index level when the biochar content is 8%.Therefore,it is recommended that the soil-slag ratio should be≥3,and the biochar content should reach 3%-5%.This research provides experimental basis and technical support for utilizing solid waste resources in the reclamation of highway spoil areas.

关键词： Highway Spoil area Waste slag Modified soil Ecological reclamation

MICROSTRUCTURE AND MORPHOLOGY OF HIGH MANGANESE NON-MAGNETIC STEEL

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Acta Metallurgica Sinica(English Letters) 1990年第3期3卷 158-163页

作者： YANG Yanqing MA shiliang qin Xiongpu KANG Mokuang Northwestern Polytechnical University,Xi’an,China YANG Yanqing,Graduate student,Dept.of Materials Science and Engineering,Northwestern Polytechnical University,Xi’an 710072,China

Two types of lath structures and kinked ε martensite were observed in the high manganese non-magnetic *** the short non-continuous lath formed by quenching and the long thin straight lath induced by plastic deformation are composed of ε martensite and fcc twin. The transformation mechanism was *** crystallographic analysis indicates that the e martensite at both sides of the fcc twin boundary is of kinked morphology owing to the orientation of their matrices differing from each *** kinked region is hcp twin.

关键词： εmartensite fcc twin lath structure kink

云南会泽地区中二叠世叶状藻礁的发现及其古环境意义

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地质论评 2018年第3期64卷 701-710页

作者：高永娟林仕良秦雅东娄雄英程锦翔中国地质调查局成都地质调查中心成都610081

1∶50000区域地质调查发现云南会泽地区中二叠世阳新组中发育叶状藻礁。本文以碳酸盐岩微相分析为主要手段,对落水洞剖面阳新组进行了微相特征和沉积相研究。识别出7个沉积微相类型:含核形石有孔虫藻屑颗粒灰岩、有孔虫藻屑颗粒灰岩、... 详细信息

1∶50000区域地质调查发现云南会泽地区中二叠世阳新组中发育叶状藻礁。本文以碳酸盐岩微相分析为主要手段,对落水洞剖面阳新组进行了微相特征和沉积相研究。识别出7个沉积微相类型:含核形石有孔虫藻屑颗粒灰岩、有孔虫藻屑颗粒灰岩、叶状藻礁灰岩、腕足棘皮泥粒灰岩、棘皮藻屑泥粒灰岩、介形类棘皮粒泥灰岩和藻屑粒泥灰岩,和4种沉积亚相类型:较深水的滩间亚相、台内低能生屑滩亚相、台内叶状藻礁亚相和台内高能生屑滩亚相。叶状藻礁形成于相对海平面上升过程中,位于台内高能生屑滩下部。落水洞剖面整体发育于暖水的开阔碳酸盐台地,指示滇东北地区中二叠世位于温暖的古气候环境。

关键词：中二叠统阳新组叶状藻礁沉积微相古环境

Exploration on learning molecular docking with deep learning models

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Quantitative Biology 2023年第3期11卷 320-331页

作者： qin Xie Wei Ma Jianhang Zhang shiliang Li Xiaobing Deng Youjun Xu Weilin Zhang Infinite Intelligence Pharma Beijing 100083China Shanghai Key Laboratory of New Drug Design State Key Laboratory of Bioreactor EngineeringSchool of PharmacyEast China University of Science and TechnologyShanghai 200237China College of Chemistry and Molecular Engineering Peking UniversityBeijing 100871China

Background:Molecular docking-based virtual screening(VS)aims to choose ligands with potential pharmacological activities from millions or even billions of *** process could significantly cut down the number of compounds that need to be experimentally ***,during the docking calculation,many molecules have low affinity for a particular protein target,which waste a lot of computational ***:We implemented a fast and practical molecular screening approach called DL-DockVS(deep learning dock virtual screening)by using deep learning models(regression and classification models)to learn the outcomes of pipelined docking programs ***:In this study,we showed that this approach could successfully weed out compounds with poor docking scores while keeping compounds with potentially high docking scores against 10 DUD-E protein targets.A self-built dataset of about 1.9 million molecules was used to further verify DL-DockVS,yielding good results in terms of recall rate,active compounds enrichment factor and runtime ***:We comprehensively evaluate the practicality and effectiveness of DL-DockVS against 10 protein *** to the improvements of runtime and maintained success rate,it would be a useful and promising approach to screen ultra-large compound libraries in the age of big *** is also very convenient for researchers to make a well-trained model of one specific target for predicting other chemical libraries and high docking-score molecules without docking computation again.

关键词： molecular docking ultra-large virtual screening deep learning

文昌鱼核糖核蛋白体结构与功能的研究——Ⅰ. 文昌鱼tRNA和5SRNA的制备

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Zoological Research 1982年第3期3卷 317-321页

作者：商金宝刘望夷秦士良蔡菊娥中国科学院上海生物化学研究所北京师范大学生物系生化教研室

本文报导了从厦门白氏文昌鱼(Branchiostoma belcheri Gray)中制备tRNA和5S RNA的方法。将文昌鱼洗净,用搅碎机破碎,然后用苯酚法提取小分子RNA。RNA粗制品经DEAE—纤维素DE22、DEAE—Sephadcx A—50和Sephadex G—100柱层析分离纯化,... 详细信息

本文报导了从厦门白氏文昌鱼(Branchiostoma belcheri Gray)中制备tRNA和5S RNA的方法。将文昌鱼洗净,用搅碎机破碎,然后用苯酚法提取小分子RNA。RNA粗制品经DEAE—纤维素DE22、DEAE—Sephadcx A—50和Sephadex G—100柱层析分离纯化,分别得到tRNA和5S RMA。再用12%聚丙烯酰胺疑胶电泳进一步纯化。测定了tRNA接受甘氨酸、丙氨酸和酪氨酸的活力分别为6.3%、5.2%和21%—25%。 tRNA的主要生物功能是携带与转移氨基酸参与蛋白质生物合成,并对基因表达进行调节控制。5S RNA是核糖核蛋白体的一个组分,在蛋白质生物合成中具有重要的功能,也是研究生物进化比较理想的一种生物大分子。自Hoagland等(1957)发现tRNA及Tissieres等(1959)发现核糖核蛋白体RNA后,科学工作者便广泛地开展了对tRNA和5SRNA结构与功能的研究。文昌鱼是一种处于脊椎动物与无脊椎动物之间过渡类型的脊索动物,属脊索动物门的头索亚门,最接近脊椎动物亚门。因此对它进行深入的生化研究,在探索生物进化方面有较大的学术意义。本文报告从文昌鱼中制备tRNA和5SRNA以及tRNA接受氨基酸活力的初步结果。

关键词：核糖核蛋白体脊椎动物亚门生物进化脊索动物门蛋白质生物合成生物大分子 tRNA 生化研究

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机床导轨结合部优化设计方法与程序

陕西机械学院学报 1989年第2期5卷 125-129页

作者：黄玉美佟浚贤董献国秦世良陕西机械学院机械工程系

本文论述了机床导轨结合部优化设计方法及其程序概要。程序是在关于导轨结合部刚度特性、摩擦特性、阻尼特性及切削点相对位移等的研究的基础上逐步开发、扩展起来的,每一步开发都进行了实验验证。解析结果与实验结果的对比表明解析方... 详细信息

本文论述了机床导轨结合部优化设计方法及其程序概要。程序是在关于导轨结合部刚度特性、摩擦特性、阻尼特性及切削点相对位移等的研究的基础上逐步开发、扩展起来的,每一步开发都进行了实验验证。解析结果与实验结果的对比表明解析方法及程序正确、可靠。

关键词：机床导轨结合部优化设计程序

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内压式超滤工艺处理山区水库水的试验

净水技术 2018年第7期37卷 31-36页

作者：曹伟奎瞿芳术吕谋李圭白秦世亮梁恒青岛理工大学环境与市政工程学院山东青岛266033 哈尔滨工业大学城市水资源与水环境国家重点实验室黑龙江哈尔滨150090 北京工业大学建筑工程学院北京100022

针对我国农村饮用水处理技术落后、建设管理水平低的现状,构建了重力流超滤系统处理山区水库水,在验证内压膜除浊、除污和消毒功能的基础上,重点考察错流周期对内压膜的净水效能和膜污染的影响。结果表明:内压式超滤膜具有良好的除浊和... 详细信息

针对我国农村饮用水处理技术落后、建设管理水平低的现状,构建了重力流超滤系统处理山区水库水,在验证内压膜除浊、除污和消毒功能的基础上,重点考察错流周期对内压膜的净水效能和膜污染的影响。结果表明:内压式超滤膜具有良好的除浊和灭菌功能,滤后水浊度低于0.1 NTU;菌落总数的去除率大于99.9%,对水中的CODMn、UV254、氨氮的去除率为14%~29%、8%~27%、10%~24%。而在错流周期为1 h、错流流量为45 L/(m^2·h)的条件下,超滤膜的净水效能和使用周期最佳,对COD_(Mn)、UV_(254)和氨氮的平均去除率较滤膜本身提高了5.43%、6.13%、3.3%,净水效果稳定,膜通量下降缓慢,自用水与能耗方面也保持在较低水平。

关键词：饮用水重力流内压膜直接超滤错流条件膜污染水库水处理

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塑料导轨阻尼特性的研究

陕西机械学院学报 1989年第1期5卷 10-16页

作者：佟浚贤秦世良郭涛董献国黄玉美陕西机械学院机械工程系

本文研究了塑料导轨结合部的阻尼特性对加工精度的影响,可移动导轨结合面的阻尼主要是内摩擦引起的,而结合面摩擦可以等效为当量阻尼。通过解析计算获得以摩擦力为参量的系统稳定性判据,系统摩擦力可用计算方法得到。在已知外激力的条... 详细信息

本文研究了塑料导轨结合部的阻尼特性对加工精度的影响,可移动导轨结合面的阻尼主要是内摩擦引起的,而结合面摩擦可以等效为当量阻尼。通过解析计算获得以摩擦力为参量的系统稳定性判据,系统摩擦力可用计算方法得到。在已知外激力的条件下可以判别系统是否稳定,并以结合部的预变形作为调整环节来改善机床的动态特性。

关键词：塑料导轨阻尼摩擦结合部

从大肠杆菌B/r中同时制备ATP:RNA腺苷酰转移酶和多核苷酸磷酸化酶

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微生物学报 1983年第4期 327-332页

作者：秦士良兰永强蔡菊娥商金宝刘望夷北京师范大学生物系中国科学院上海生物化学研究所

本文报道了从大肠杆菌B/r中同时制备ATP∶RNA腺苷酰转移酶和PNPase的简便方法。菌体经压力破碎,聚乙二醇、葡聚糖分相抽提及磷酸纤维素柱层析得到ATP∶RNA腺苷酰转移酶。其滤液经DEAE纤维素柱层析和Sephadex G-200凝胶过滤得到PNPase。... 详细信息

本文报道了从大肠杆菌B/r中同时制备ATP∶RNA腺苷酰转移酶和PNPase的简便方法。菌体经压力破碎,聚乙二醇、葡聚糖分相抽提及磷酸纤维素柱层析得到ATP∶RNA腺苷酰转移酶。其滤液经DEAE纤维素柱层析和Sephadex G-200凝胶过滤得到PNPase。用Oligo dT纤维素和聚丙烯酰胺凝胶电泳对酶反应产物作了初步鉴定。

关键词： ATP 转移酶磷酸纤维素缓冲液 B/r 酶反应大肠杆菌大肠埃希氏菌埃希氏杆菌属柱层析 RNA