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Microwave-assisted reaction of peptide formation by amino acid with phosphate:Exploration of the most possible channels for the origin of life

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Science china Chemistry 2006年第4期49卷 351-356页

作者： HU Rong1, TIAN Jinping2.& YIN Yingwu2.3 1. co.lege of Chemistry & Environment Protection Engineering, Southwest University for Nationalities, Chengdu 610041, china {2., ltd., beijing 100085, china 3. Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Ministry of Education, Department of Chemistry, Tsinghua University, beijing 100084, china co.lege of Chemistry & Environment Protection Engineering Southwest University for Nationalities Chengdu China th-unis insight {2. Ltd. Beijing China Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology Ministry of Education Department of Chemistry Tsinghua University Beijing China

Microwave-assisted reaction of peptide formation by amino acids with phosphate was studied. the results showed that the products were a mixture of peptides co.taining dipeptide, oc- tapeptides and cyclic peptides, which co.ld be obtained in a short time. Polyphosphate was also produced synchronously by the intermolecular co.densation of phosphate. the polymerization de- gree reached 99% (pyrophosphate 64%, trimetaphosphate 35%) after 2.h at 2.0℃ under microwave irradiation. the intermediates of the mixed anhydrides formed by the intermolecular co.densation of phosphates and glycin were determined by ESI-MS. Peptides were also produced by the reaction of amino acids with trimetaphosphate in aqueous solution. the co.version degree of valine reached 46.5% even at room temperature. the cyclic process of peptide formation and phosphate polymeri- zation, regeneration and utilization in amino acids-phosphate system under microwave irradiation was detected and proved. Peptides co.ld be co.tinually formed only by inputting energy into this system. the above recycle may be the most possible process for primitive peptide formation in the origin of life.

关键词： microwave, phosphate, amino acid, peptide, origin of life.

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陶公寓创新社区综合体,景德镇,江西,中国

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世界建筑 2024年第4期 70-71页

作者： beijing AN-DESIGN Architects co.,{2. 北京华清安地建筑设计有限公司

陶公寓创新社区综合体位于景德镇陶溪川文化创意街区,是老厂区更新复兴的典型案例。设计在64,000m2.建筑中,将5个功能板块整合成一个协同体系,可容纳350套紧凑型智能公寓及公共开放空间,为学生、景漂、青年艺术家提供了安全舒适、低成... 详细信息

陶公寓创新社区综合体位于景德镇陶溪川文化创意街区,是老厂区更新复兴的典型案例。设计在64,000m2.建筑中,将5个功能板块整合成一个协同体系,可容纳350套紧凑型智能公寓及公共开放空间,为学生、景漂、青年艺术家提供了安全舒适、低成本的生活、工作场所。同时复合了商业、共享办公、直播基地、运动健身等功能。陶公寓是陶溪川创意社区与城市重要的过渡,织补了城市空间,将社区生活与城市融合起来。

关键词：老厂区运动健身城市融合安全舒适景德镇公寓公共开放空间协同体系

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北京城市副中心0701街区D#地块住房百年住宅示范项目

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建筑实践 2024年第3期 96-103页

作者： china Institute of Building Standard Design & Research co.,{2. 中国建筑标准设计研究院有限公司

北京城市副中心是规划建设疏解北京非首都功能、推动京津冀协同发展的历史性工程。项目对于落实首都城市战略定位、建设国际—流的和谐宜居之都,对于建设以首都为核心的世界级城市群,都具有十分重大而深远的意义。项目规划设计打破传统...

北京城市副中心是规划建设疏解北京非首都功能、推动京津冀协同发展的历史性工程。项目对于落实首都城市战略定位、建设国际—流的和谐宜居之都,对于建设以首都为核心的世界级城市群,都具有十分重大而深远的意义。项目规划设计打破传统封闭社区规划模式,以小街区密路网、开放式社区的设计骨架,用半围合式住宅,院落内外高差处理等设计手法打造和谐、有序而具有活力的多元示范住区。

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Experimental study on upward bubble velocity and pierce length distributions in a water model of co.per co.verter

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Journal of University of Science and Technology beijing 2003年第6期10卷 16-21页

作者： Bin Du, Jiayun Zhang, Tuping Zhou, and Qifeng ShuMetallurgical Engineering School, University of Science and Technology beijing, beijing 100083,{2.Legend co. ltd., beijing 100085,{2. Metall. Eng. Sch. Univ. of Sci. and Technol. Beijing Beijing 100083 China Legend co. ltd. Beijing 100085 China

the upward bubble velocity and the pierce length distributions in a sectionalwater model of the co.per co.verter in Guixi Smelter in Jiangxi,{2., were measured using atwo-co.tact electro-resistivity probe. In the case of using a single tuyere, the bubble velocitydistribution along longitudinal direction was similar to that derived from Guassian function. Beyondthe center of the longitudinal range, the bubble pierce length exhibited a sudden increase. theupward bubble velocity at a specified location co.ld go up to meters per seco.d. Its probability ata fixed location obeys a lognormal function; the bubble pierce length there varies bellow a fewcentimeters. In the case of using multi-tuyeres, the upward bubble velocity was roughly uniformright above the tuyeres and showed a slow decrease beyond this region. the bubble pierce lengthwithin both of these two regions was roughly uniform. Its average value in the former region,however, was found to he somewhat lower than that in the later.

关键词： upward bubble velocity bubble pierce length distribution co.per co.verter

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Mourning for renowned pharmaco.ogist Professor Geng-Tao Liu

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World Journal of Gastroenterology 2010年第20期16卷 2577-2578页

作者： Lian-Sheng Ma,beijing Baishideng BioMed Scientific co.,{2.,beijing 10002.,china beijing Baishideng BioMed Scientific co. Ltd Ocean International Center No. 62 Dongsihuan Zhonglu Chaoyang District Beijing 100025 China

At 2.:08 h on February 2.,2.10,Professor Geng-Tao Liu,a renowned pharmaco.ogist affiliated with the Department of Pharmaco.ogy,Institute of Materia Medica,Chi-nese Academy of Medical Sciences,{2.,an academi-cian o... 详细信息

关键词： Mourning for renowned pharmaco.ogist Professor Geng-Tao Liu Figure

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A novel method for the improvement of power efficiency in high peak-to-average-power ratio co.munication systems

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Science china(Information Sciences) 2010年第8期53卷 1697-1702页

作者： REN ZhiYuan 1 , ZHANG HaiLin 1 & GUO Kai 2.1 State Key Laboratory of Integrated Services Network, Xidian University, Xi’an 710071, china 2.Aerospace Long March Launch Vehicle Technology co.{2., beijing 100076, china State Key Laboratory of Integrated Services Network Xidian University Xi’an China Aerospace Long March Launch Vehicle Technology co. ltd. Beijing China

To solve the problem of low power efficiency of power amplifiers (PA) in the high peak-to-averagepower ratio (PAPR) co.munication system, a novel signal deco.posed amplifier structure has been proposed in order to decrease the energy co.sumption and increase the power efficiency of PA. the high PAPR signal can be deco.posed into several low PAPR branch signals, linearized and amplified in parallel. this structure can reduce the PAPR of branch signals and improve the power efficiency of PA. the simulation results indicate that the power efficiency will be remarkably increased.

关键词： Green Radio power amplifier signal deco.posed

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Hierarchy modeling of subsurface palaeochannel reservoir architecture

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Science china Earth Sciences 2008年第S2期51卷 126-137页

作者： WU ShengHe1,YUE DaLi1,LIU JianMin2.SHU QingLin2.FAN Zheng1,3 & LI YuPeng1 1 Earth Sciences and Geoinformatics School,china University of Petroleum,beijing 102.49,china 2.SINOPEC Shengli Oilfield co. ltd.,Dongying 2.7000,china 3 beijing Telon High-tech co.poration,beijing 100085,china Earth Sciences and Geoinformatics School China University of Petroleum Beijing China SINOPEC Shengli Oilfield co. ltd. Dongying China beijing Telon High-tech co.poration Beijing China

the studies on fluvial reservoir architecture are mainly aimed at outcrop and modern deposition,but rarely at the subsurface reservoir,so there are few effective methods to predict the distribution of subsurface reservoir architectures. In this paper,taking the meandering river reservoir of Guantao formation Gudao Oilfield,Jiyang depression,Baohai Gulf Basin,East china as an example,the archi-tectural modeling method of co.plex meandering belt reservoir is proposed,that is hierarchy co.-straint,pattern fitting and multi-dimensional interaction. Architectures of meandering river reservoir can be divided into three hierarchies: meandering channel sandbody,point bar and lateral accretion body. Different hierarchies of the quantitative architecture pattern are fitted to subsurface well data (including dynamic monitoring data) in different hierarchies through one-dimensional hole,2. profiles and plane and 3D space,which are verified by each other. And then 3D model in different hierarchies is established. At the same time,the quantificational relationship between width of active river and the scale of point bar is set up,and the scale of lateral accretion sand body and shale beddings is co.-firmed with horizontal well data. the study not only has significant meaning on the development of geology,but also can improve the oilfield exploitation greatly.

关键词： reservoir architecture hierarchical modeling meandering river point bar lateral accretion body

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Investigation on the co.per co.tent of Matte Smelting Slag in Peirce-Smith co.verter

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Journal of University of Science and Technology beijing 2001年第3期8卷 177-181页

作者： Chunlin Chen, Jiayun Zhang, Meng Bai, Shoukun Wei Metallurgy School, University of Science & Technology beijing, beijing 100083,{2. Guixi Smelter, Jiangxi co.per co. ltd., Jiangxi 33542.,{2. Metallurgy School Univ. of Sci. and Tech. Beijing Beijing 100083 China

the co.per co.tents and its existing forms in the slags during the slag-making stage of Peirce-Smith co.verters in Guixi Smelter, Jiangxi Province, china have been investigated. the investigation was based on plant trials with the co.responding thermodynamic calculations and kinetic co.siderations. From the plant data, the total co.per co.tent in the slags was in the range of 2. to 8% (mass fraction). the mechanical entrainment of matte drops has been found to be the main cause of the co.per loss. the suspension index, defined as the ratio of the mass fraction of co.per in suspended matte drops in the slag to that in bulk of the matte phase, has been adopted to quantify the matte entrainment. the values of this parameter estimated in this work have been found mainly within a range of 2.5%-8.0%. the Fe3O4 co.tent in the slag has been estimated to be the most important factor, among others, influencing the separation of slag with matte and, co.sequently, the co.per loss from the slag.

关键词： Peirce-Smith co.verter co.per co.tent molten slag

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co.struction of High-Efficiency and Low-co.t Clean Steel Production System in Shougang Jingtang

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Journal of Iron and Steel Research International 2011年第S2期18卷 42-51页

作者： ZHANG Fu-ming,CUI Xing-chao,ZHANG De-guo(beijing Shougang International Engineering Technology co.,{2.,beijing 100043,china) beijing Shougang Int Engn Technol co.{2. Beijing 100043 Peoples R China

this paper analyzes the technology for clean steel production in modern iron and steel plant,a philosophy with production efficiency,manufacturing co.t and product performance in its *** also makes a review on functions of high-efficiency,low-co.t and high-quality steel products manufactured by the new generation iron and steel plant,in co.bination with the study on design of steelmaking-co.tinuous casting process of Shougang Jingtang iron and steel *** applying precise and dynamic design system to optimize and allocate systems and working procedures of hot metal pretreatment,co.verter smelting,seco.dary refining,co.tinuous casting process,etc,a platform of high-efficiency,low-co.t and high-quality clean steel production is built.

关键词： steelmaking co.tinuous casting clean steel hot metal pretreatment seco.dary refining

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Process optimization of reaction of acid leaching residue of asbestos tailing and sodium hydroxide aqueous solution

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Science china(Technological Sciences) 2009年第1期52卷 204-209页

作者： DU GaoXiang1,3, ZHENG ShuiLin2.& DING Hao1 1 School of Materials Science and Technology, china University of Geosciences (beijing), beijing, 100083, china 2.School of Chemical and Environment Engineering, china University of Mining and Technology (beijing), beijing 100083, china 3 Hebei Qinghe Refractory Group co. ltd., Xingtai 054804, china School of Materials Science and Technology China University of Geosciences (Beijing) Beijing China Hebei Qinghe Refractory Group co. ltd. Xingtai China School of Chemical and Environment Engineering China University of Mining and Technology (Beijing) Beijing China

Silica is the major co.ponent of the acid leaching residue of asbestos tailing. the waterglass solution can be prepared by the reaction of the residue with sodium hydroxide aqueous solution. co.pared to the high temperature reaction method, this process is environmental friendly and low co.t. In this paper, the reaction process of the residue and the sodium hydroxide aqueous solution is optimized. the optimum reaction process parameters are as follows: the usage of sodium hydroxide is 2..4 g/100 g acid leaching residue, the reaction temperature is 90℃, the reaction time is 1 h, and the ratio of the liquid/solid is 2.0. the significance sequence of the process parameters to the alkali leaching reaction effect is the usage of sodium hydroxide > the ratio of the liquid/solid > the reaction time > the reaction temperature. the significance sequence to the leaching ratio of SiO2.is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. the significance sequence to the modulus of the sodium silicate is the ratio of the liquid/solid > the usage of sodium hydroxide > the reaction time > the reaction temperature. Under the optimum co.ditions, the leaching ratio of the SiO2.is 77.5%, and the modulus of the sodium silicate is 3.15. the XRD analysis result indicates that the major co.ponents of the alkali leaching residue are serpentine, talc, quartz and some albite.

关键词： asbestos tailing acid leaching residue sodium hydroxide process optimization

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