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Further study of sources of the imported cobalt-blue pigment used on Jingdezhen porcelain from late 13 to early 15 centuries

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science china(Technological sciences) 2008年第3期51卷 249-259页

作者： du feng1 & su baoru2 1 institute of chemistry & molecular engineering, qingdao university of science & technology, qingdao 266000, china 2 College of Information science technology, qingdao university of science & technology, qingdao 266000, china institute of chemistry & molecular engineering Qingdao University of Science & Technology Qingdao 266000 China College of Information science technology Qingdao University of Science & Technology Qingdao 266000 China

Based on the conclusion of modern scientific analysis: the cobalt-blue pigment applied on Jingdezhen official porcelain during Yuan Dynasty and prior to Xuande reign of Ming Dynasty (1271―1425) contains high iron and low manganese con- tents, and the cobalt during Xuande and after Xuande periods (after 1426) of Ming Dynasty contains high manganese and low iron contents, in combination with the traditional archaeological method, the related historical textual records were in- vestigated and analyzed, the imported cobalt employed on Jingdezhen official porcelain was studied comprehensively, systematically and logically. In fact, 'su Ma Li Qing' (Samarra-blue) and 'su Bo Ni Qing' (sumatra-blue) are definitely different cobalt ores originated in different places, because of their very similar translitera- tions in Chinese, the confusion has appeared in ancient books for more than 400 years, which considered 'su Ma Li Qing' and 'su Bo Ni Qing' as the same co- balt-blue pigment. In this article the mistake was corrected, the possible producing places and the approximate eras of the two pigments imported to china and used at Jingdezhen were also suggested.

关键词： imported cobalt-blue pigments employed on official blue-and-white porcelain Yuan Dynasty early Ming Dy- nasty Mn/Fe content ratio su Ma Li Qing (Samarra-blue) su Bo Ni Qing (sumatra-blue) scientific archae- ological research transliteration

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Investigation of 'chazi'(damaged-enamels)on Chenghua doucai Porcelains

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science china(Technological sciences) 2009年第6期52卷 1722-1729页

作者： du feng1 & su baoru2 1 institute of chemistry & molecular engineering,qingdao university of science & technology,qingdao,china 2 College of Information science & technology,qingdao university of science & technology,qingdao,china institute of chemistry & molecular engineering Qingdao University of Science & Technology Qingdao China College of Information science & technology Qingdao University of Science & Technology Qingdao China

At the end of the 1950s,sun Yingzhou considered that the 'chazi'(damaged colour)on Chenghua doucai imperial porcelain as a defect was originally produced in firing process during Chenghua period(1465―1487).Researchers in china have accepted his *** any fragment with the 'chazi' has never been found in several tons of Chenghua imperial sherds excavated from Ming imperial kiln site in *** china,few scholars have questioned the formation of 'chazi',and further investigated *** researchers at the Research Laboratory in the British Museum,employing unde-structive EDXRF,have analyzed the chemical composition of the 'chazi'(damaged colour)on a Chen-ghua doucai stem cup in the museum,and they have confirmed that the 'chazi'(damaged colour)was caused by the fire of the Jianfu palace in the Forbidden City in *** on their research,the authors studied the colour chemical principle of the 'chazi's' formation *** to the ceramic technology principle,scientific reasoning for the 'chazi' was carried *** the help of the history of Qing court,the brainteaser of the 'chazi' was totally uncovered,the misunderstanding for the 'chazi' has also been *** research also suggests that employing modern science and technology is a direction to study Chinese ancient ceramic further.

关键词： Chenghua doucai porcelains court eunuchs the set on fire at the Jianfu palace ’chazi’(damaged-enamels) the British Museum colour chemical principle archaeology using science and technology

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Expressed sequence tag analysis and cloning of trehalose-6-phosphate synthase gene from marine alga Laminaria japonica(Phaeophyta)

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Acta Oceanologica Sinica 2012年第6期31卷 139-148页

作者： XUAN Jinsong 1,4,feng Yanbin 1,WENG Manli 1,ZHAO Ge 1,SHI Jinfeng 1,YAO Jianting 2,WANG Xiuliang 2,GUO Baotai 3,QIAO Lixian 3,duAN Delin 2,WANG Bin 1 1 The State Key Laboratory of Plant Genomics,institute of Genetics and Developmental Biology,Chinese Academy of sciences,Beijing 100101,china 2 The State Key Laboratory of Marine Biology,institute of Oceanology,Chinese Academy of sciences,qingdao 266071,china 3 College of Life sciences,qingdao Agricultural university,qingdao 266109,china 4 Department of Biological science and engineering,School of Chemical and Biological engineering,university of science and technology Beijing,Beijing 100083,china 1. The State Key Laboratory of Plant Genomics Institute of Genetics and Developmental Biology Chinese Academy of Sciences Beijing 100101 China 4. Department of Biological science and engineering School of Chemical and Biological Engineering University of Science and Technology Beijing Beijing 100083 China 2. The State Key Laboratory of Marine Biology Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China 3. College of Life sciences Qingdao Agricultural University Qingdao 266109 China

A high quality cDNA library was constructed from the brown alga Laminaria japonica,with the titer of 1.2×10 5 pfu/*** average insert size of the cDNA library is about 1.6 *** the cDNA library,591 cDNA clones were randomly selected and *** a result,574 EST(expressed sequence tag) sequences were *** of the 574 ESTs were submitted to the dbEST database section of GenBank with the accession numbers from CX942625 to *** cDNA library was screened with a α-32 p labeled 453 bp T P S gene probe,which is a partial sequence yielded from Porphyra *** positive cDNA clones were screened and the sequencing data showed that these four cDNA clones covered majority of *** TPS cDNA *** PCR amplification,sequencing and assembling,the entire ORF(open reading frame) sequence of the T P S gene was obtained,which was named *** encodes a protein containing 908 amino acids with a calculated molecular mass of 101 674 *** LjTPS gene was successfully expressed in *** and *** LjTPS gene has potential application both in plant breeding to stress tolerance and in deciphering the T P S gene function and mechanism to stress tolerance.

关键词： cDNA library comparative study expressed sequence tag(EST) analysis Laminaria japonica trehalose-6-phosphate synthase(TPS) T P S gene

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A stepwise approach to enhancing flotation of low-grade zinnwaldite through the cationic/DL-2-octanol/anionic reagent combinations: Behavior and mechanism analysis

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International Journal of Mining science and technology 2024年第6期34卷 881-891页

作者： Zhonghua Xue Yali feng Haoran Li Jinrong Ju Xingquan du School of Civil and Resource engineering University of Science and Technology BeijingBeijing 100083China Key Laboratory of Biochemical engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China university of Chinese Academy of sciences Beijing 100049China

In order to alleviate the pressure on the supply of lithium resources, this research proposes the use of binary/ternary collectors with high selectivity and collecting ability to enhance the flotation purification of low-grade zinnwaldite ore. The binary collector is a mixture of dodecylamine polyoxyethylene ether and DL-2-octanol. A binary collector is added first, followed by sodium oleate, known as a ternary collector. Under acidic conditions, the recovery of Li2O in the concentrate was increased by 8.26% with the binary collector and 13.70% with the ternary collector, compared to the dodecylamine polyoxyethylene ether. The binary collector enhanced the dispersibility of the single collector, while co-adsorption strengthened the hydrophobic nature of the zinnwaldite surface. Consequently, zinnwaldite particles,after the application of binary collector, displayed inter-particle flocculation and attachment to bubbles within 60×10^(-9)m compared to other particles. Ternary collector exhibited the capacity to lower critical micelle concentration and surface tension, subsequently inducing a denser and thicker hydrophobic layer through electrostatic forces, hydrophobic interactions, and chemical reactions. The objective of this research is to facilitate the recovery of lithium resources from low-grade ores in order to meet the needs of sustainable development.

关键词： Zinnwaldite molecular dynamics simulation Flotation Ternary collector Extended DLVO theory

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molecular Dynamics Simulation Studies on the Micromorphology and Proton Transport of Nafion/Ti_(3)C_(2)T_(x) Composite Membrane

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Chinese Journal of Polymer science 2024年第3期42卷 373-387,I0009页

作者： Zhi-Yue Han su-Peng Pei Chun-Yang Yu Yong-feng Zhou School of Chemical and Environmental engineering Shanghai Institute of TechnologyShanghai 201418China School of chemistry&Chemical engineering Frontiers Science Center for Transformative MoleculesShanghai Key Laboratory of Electrical Insulation and Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Green and High-end Utilization of Salt Lake Resources Chinese Academy of SciencesXining 810008China

The perfluorosulfonic acid(PFSA) membrane doped with two-dimensional conductive filler Ti_(3)C_(2)T_(x) is a fuel cell proton exchange membrane with high application potential. Experimental studies showed that the proton conductivity of Nafion/Ti_(3)C_(2)T_(x) composite membrane is improved significantly compared with that in pure Nafion. However, the microscopic mechanism of doping on the enhancement of membrane performance is remain unclear now. In this work, molecular dynamics simulation was used to investigate the microscopic morphology and proton transport behaviors of Nafion/Ti_(3)C_(2)T_(x) composite membrane at the molecular level. The results shown that there were significant differences about the diffusion kinetics of water molecules and hydroxium ions in Nafion/Ti_(3)C_(2)T_(x) at low and high hydration levels in the nanoscale *** the increase of water content, Ti_(3)C_(2)T_(x) in membrane was gradually surrounded by ambient water molecules to form a hydration layer, and forming a relatively continuous proton transport channel between Nafion polymer and Ti_(3)C_(2)T_(x) monomer. The continuous proton transport channel could increase the number of binding sites of proton and thus achieving high proton conductivity and high mobility of water molecules at higher hydration level. The current work can provide a theoretical guidance for designing new type of Nafion composite membranes.

关键词： Nafion/Ti_(3)C_(2)T_(x)composite membrane Proton transport molecular dynamics simulation

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Accurate studies on the full vibrational energy spectra and molecular dissociation energies for some electronic states of N_(2)molecule

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science china(Physics,Mechanics & Astronomy) 2005年第4期48卷 385-398页

作者： REN Weiyi1,2, suN Weiguo1, HOU Shilin3 & feng Hao4 1. institute of Physics, College of Chemical engineering, Sichuan university, Chengdu 610065, china 2. institute of Theoretical Physics, Xihua Normal university, Nanchong 637002, china 3. Department of Physics, china Oceanography university, qingdao 266003, china 4. College of Physics, Sichuan university, Chengdu 610065, china 1. institute of Physics College of Chemical Engineering Sichuan University 610065 Chengdu China 2. institute of Theoretical Physics Xihua Normal University 637002 Nanchong China 3. Department of Physics China Oceanography University 266003 Qingdao China 4. College of Physics Sichuan University 610065 Chengdu China

It is usually very difficult to directly obtain molecular dissociation energy De and all accurate high-lying vibrational energies for most diatomic electronic states using modern experimental techniques or quantum theories, and it is also very difficult to give accurate analytical expression for diatomic molecular dissociation energy. This study proposes a new analytical formula for obtaining accurate molecular dissociation energy based on the LeRoy and Bernstein’s energy expression in dissociation limit. A set of full vibrational energy spectra for some electronic states of N2 molecule are studied using the algebraic method (AM) suggested recently, and the corresponding accurate molecular dissociation energies are evaluated using the proposed new formula and high-lying AM vibrational energies. The results show that the AM spectra and the new theoretical dissociation energies agree excellently with experimental data, and thereby providing a new physical approach to generating accurate dissociation energies for electronic states of diatomic molecules.

关键词： vibrational energy, dissociation energy, nitrogen molecule, algebraic method.

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Function of the iron-binding chelator produced by Coriolus versicolor in lignin biodegradation

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science china(Life sciences) 2008年第3期51卷 214-221页

作者： WANG Lu1, YAN WenChao1, CHEN JiaChuan2, HUANG feng1,2 & GAO PeiJi1 1 State Key Laboratory of Microbial technology, Shandong university, Jinan 250100, china 2 Shandong Key Lab of Pulp and Paper engineering, Shandong institute of Light Industry, Jinan 250100, china State Key Laboratory of Microbial technology Shandong University Jinan 250100 China Shandong Key Lab of Pulp Paper engineering Shandong Institute of Light Industry Jinan 250100 China

An ultrafiltered low-molecular-weight preparation of chelating compounds was isolated from a wood-containing culture of the white-rot basidiomycete Coriolus versicolor. This preparation could chelate Fe3+ and reduce Fe3+ to Fe2+, demonstrating that the substance may serve as a ferric chelator, oxygen-reducing agent, and redox-cycling molecule, which would include functioning as the electron transport carrier in Fenton reaction. Lignin was treated with the iron-binding chelator and the changes in structure were investigated by 1H-NMR, 13C-NMR, difference spectrum caused by ionization under alkaline conditions and nitrobenzene oxidation. The results indicated that the iron-binding chelator could destroy the β-O-4 bonds in etherified lignin units and insert phenolic hydroxyl groups. The low-molecular-weight chelator secreted by C. versicolor resulted in new phenolic substructures in the lignin polymer, making it susceptible to attack by laccase or manganese peroxidase. Thus, the synergic action of the iron-binding chelator and the lignocellulolytic enzymes made the substrate more acces- sible to degradation.

关键词： Coriolus versicolor lignin degradation iron binding chelator

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垃圾衍生燃料等温快速热解和燃烧反应特性

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燃料化学学报 2004年第4期32卷 440-445页

作者：王志奇陈勇青岛科技大学化学与分子工程学院山东青岛266042 中国科学院广州能源研究所广东广州510070

利用热天平和管式炉对RDF(RefuseDerivedFuel)等温快速热解和燃烧反应特性进行了研究。实验发现,在等温快速升温的条件下,RDF热解和燃烧的反应速率都非常快,从受热开始到反应结束需60s～80s;从开始失重到完成反应为20s。RDF热解和燃烧... 详细信息

利用热天平和管式炉对RDF(RefuseDerivedFuel)等温快速热解和燃烧反应特性进行了研究。实验发现,在等温快速升温的条件下,RDF热解和燃烧的反应速率都非常快,从受热开始到反应结束需60s～80s;从开始失重到完成反应为20s。RDF热解和燃烧热重反应曲线非常类似,都只有一个反应失重区;RDF组成对其燃烧和热解反应性有重要影响,含有橡胶的RDF的热解和燃烧反应速率较小。在650℃～800℃RDF快速热解产物中气、液产物的产率可达80%～90%,而固体产物的产率只有10%～20%,热解气体的热值为20kJ/m3,RDF较适合进行热解处理。

关键词：垃圾衍生燃料等温快速热解等温快速燃烧热解产物

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A first-principles investigation into the hydrogen bond interaction in β-HMX

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science china(Physics,Mechanics & Astronomy) 2010年第6期53卷 1080-1085页

作者： CHEN Fang 1 ,ZHANG Hong 1,2,ZHAO feng 3 ,MENG ChuanMin 3 & CHENG XinLu 1 1 institute of Atomic and molecular Physics,Sichuan university,Chengdu 610065,china 2 School of Physical science and technology,Sichuan university,Chengdu 610065,china 3 Laboratory for Shock Wave and Detonation Physics Research,Southwest institute of Fluid Physics,china Academy of engineering Physics,Mianyang 621900,china 1. institute of Atomic and molecular Physics Sichuan University Chengdu 610065 China2. School of Physical Science and Technology Sichuan University Chengdu 610065 China3. Laboratory for Shock Wave and Detonation Physics Research Southwest Institute of Fluid Physics China Academy of Engineering Physics Mianyang 621900 China

A theoretical study of structural and electronic properties of β-HMX crystal is performed using density-functional theory(DFT). The total density of states(TDOS) is presented. The atomic orbit projected density of state(PDOS) from the p-type orbit of C,N,O and the s-type orbit of H is discussed. The study by analyzing the PDOS shows that the structure of β-HMX crystal possesses C-H···O intra- and inter-molecular hydrogen-bonding. There exists a hydrogen bonding between H5 -1s and O12 -2p orbits,between H19 -1s and O28 -2p orbits of intra molecules,and between H19 -1s and O24 -2p orbits of inter molecules. The Mulliken population analysis is also made.

关键词： structural property hydrogen bond β-HMX population analysis

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Numerical simulation of profile control by clay particles after polymer flooding

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Petroleum science 2010年第4期7卷 509-514页

作者： feng Qihong Shi Shubin Wang Sen Zheng Lu School of Petroleum engineering China University of Petroleum Qingdao Shandong 266555 China School of Petroleum engineering China University of Petroleum Beijing 102249 China Shengli Oil Production Research institute SINOPEC Dongying Shandong 257000 China Bozhong Operation Company CNOOC Tianjin 300452 China

A three-dimensional,two-phase,five-component mathematical model has been developed to describe flow characteristics of clay particles and flocs in the profile control process,in which the clay particle suspension is injected into the formation to react with residual *** model considers the reaction of clay particles with residual polymer,apparent viscosity of the mixture,retention of clay particles and flocs,as well as the decline in porosity and permeability caused by the retention of clay particles and flocs.A finite difference method is used to discretize the equation for each component in the *** Runge-Kutta method is used to solve the polymer flow equation,and operator splitting algorithms are used to split the flow equation for clay particles into a hyperbolic equation for convection and a parabolic equation for diffusion,which effectively ensures excellent precision,high speed and good *** numerical simulation had been applied successfully in the 4-P1920 unit of the Lamadian Oilfield to forecast the blocking capacity of clay particle suspension and to optimize the injection parameters.

关键词： Clay particles flocs detention operator splitting algorithms numerical simulation

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