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| 1 | The influence of temperature on rare earth flotation with naphthyl hydroxamic acid显示文摘The influence of temperature on the complex process of Bayan Obo rare earth(RE) ore flotation with a collector of naphthyl hydroxamic acid(LF8#) was investigated. Industrial test data shows that the grade and recovery of RE increase with the temperature. However, the proportion of bastnaesite in the bulk concentrate increases as the RE grade improves. Adsorption mechanism of LF8# on the surfaces of bastnaesite and monazite were confirmed via zeta potential, UV/Vis Spectrophotometer(UV/Vis), Fourier transform infrared(FTIR), and X-ray photoelectron spectroscopy analyses(XPS). Although the results indicate that the total amount of the LF8# adsorption on the surface of bastnaesite and monazite decreases with increasing the temperature, the amount of stable adsorbed predominance of characteristic bonds(-C(=O)N-) from LF8# uptake on bastnaesite surfaces increases significantly at high temperatures. This conclusion indicates that the adsorption stability increases with increasing the temperature.For monazite, the amount of characteristic elements C and N in LF8# does not increase as the temperature increases on the mineral surface, but the proportion of characteristic bonds increases, which shows that the adsorption stability of LF8# on the surface of monazite also increases, but it is not as significant as bastnaesite, which may be one of the reasons that the floatability of bastnaesite is better than those of monazite. Pulp dispersion results show that the temperature improve the dispersions of both the gangue and RE minerals. This improved the flotation selectivity so that it favored RE minerals. The calculated bubble size distribution confirms that higher temperatures generate smaller bubbles, thereby increasing the bubble-particle collision probability and the recovery of RE minerals. | Mei Li Kai Gao Dongliang Zhang Haijun Duan Linlin Ma Lan Huang | 2018 | Journal of Rare Earths2018，36，1： | 13 |
| 2 | Controllable synthesis of highly crystallized mesoporous TiO2/WO3 heterojunctions for acetone gas sensing显示文摘Mesoporous semiconducting metal oxides(SMOs)heterojunctions are appealing sensors for gas detecting.However,due to the different hydrolysis and condensation mechanism of every metal precursor and the contradiction between high crystallinity and high surface area,the synthesis of mesoporous SMOs heterojunctions with highly o rdered mesostructures,highly crystallized frameworks,and high surface area remains a huge challenge.In this work,we develop a novel'acid-base pair'adjusted solvent evaporation induced self-assembly(EISA)strategy to prepare highly crystallized ordered mesoporous TiO2/WO3(OM-TiO2/WO3)heterojunctions.The WCl6 and titanium isopropoxide(TIPO)are used as the precursors,respectively,which function as the'acid-base pair',enabling the coassembly with the structure directing agent(PEO-b-PS)into highly ordered meso structures.In addition,PEO-b-PS can be converted to rigid carbon which can protect the meso structures from collapse during the crystallization process.The resultant OM-TiO2/WO3 heterojunctions possess primitive cubic mesostructures,large pore size(~21.1 nm),highly crystalline frameworks and surface area(~98 m2/g).As a sensor for acetone,the obtained OM-TiO2/WO3 show excellent re sponse/recovery perfo rmance(3 s/5 s),good linear dependence,repeatability,selectivity,and long-term stability(35 days). | Changyao Wang Yuhui Li Pengpeng Qiu Linlin Duan Wei Bi Yan Chen Dingyi Guo Yupu Liu Wei Luo Yonghui Deng | 2020 | Chinese Chemical Letters2020，31，5： | 4 |
| 3 | Mechanism of phthalic acid collector in flotation separation of fluorite and rare earth显示文摘The mechanism of phthalic acid,a dicarboxylic acid collector,in flotation separation of fluorite and rare earth(RE)was studied in this paper.The experimental data of flotation show that phthalic acid,as the collector,can realize highly efficient separation of fluorite and rare earth under weakly acidic conditions.The adsorption mechanism of phthalic acid on the surface of fluorite and bastnaesite was analyzed in this paper by means of the zeta potential measurement,the Fourier transform infrared(FT-IR),the X-ray photoelectron spectroscopy(XPS)and the stability constant measurement of active metal ion and phthalic acid coo rdination complex.According to the zeta potential testing results,the surfaces of fluorite adsorb the collector phthalate ion with negative charge under weakly acidic conditions which,in turn,increases its electronegativity and results in the motion of its potential.After the reaction between phthalic acid and fluorite ores under weakly acidic conditions,the peak of the fluorite ores is found to have significant changes in the FT-IR results,indicating strong chemical adsorption on the surfaces of phthalic acid and fluorite ores.According to the XPS analysis,the peak of benzene ring of phthalic acid is as high as 2%on the surface of fluorite,while no obvious characteristic peak of benzene ring is found on the surface of bastnaesite.According to the pH potentiometric titration results,the stability constant Ktotal of calcium phthalate complex within the acid range is higher than the stability constant K’total of cerium phthalate complex,indicating that the complex generated between phthalic acid and Ca^(2+)is more stable than the complex generated between phthalic acid and Ce^(3+).The possible reason is that Ca^(2+),with the highest reticular density,plays a prevailing role in the octahedron structure of fluorite amidst the acidic media.As the active point of flotation,Ca^(2+)works with the carboxyl groups of the collector phthalic acid(-C=O-)to form polycyclic calcium phthalate complex. | Sheng Chang Mei Li Kai Gao Dongliang Zhang Haijun Duan Linlin Ma Zheng Ruan | 2022 | Journal of Rare Earths2022，40，1： | 4 |
| 4 | Simulation and optimization of micro power generation process by utilizing urban natural gas pipeline pressure energy显示文摘 | Xiaxi Li Hui Zhang Wendong Xu Linlin Xing Wei Duan | 2015 | Advances in engineering research2015，17，： | 1 |
| 5 | Treatment with carnosine reduces hypoxia-ischemia brain damage in a neonatal rat model显示文摘 | Huizhen Zhang Shang Guo Linlin Zhang Liting Jia Zhan Zhang Hongbao Duan Jingbin Zhang Jingyan Liu Weidong Zhang | 2014 | European Journal of Pharmacology2014，，： | 1 |
| 6 | Starch digestibility and the estimated glycemic score of different types of rice differing in amylose contents显示文摘 | Peisong Hu Haijun Zhao Zhiying Duan Zhang Linlin Dianxing Wu | 2004 | Journal of Cereal Science2004，，3： | 1 |
| 7 | Simulation and optimization of micro power generation process by utilizing urban natural gas pipeline pressure energy显示文摘 | Xiaxi Li Hui Zhang Wendong Xu Linlin Xing Wei Duan | 2015 | Advances in engineering research2015，17，： | 1 |
| 8 | The self-assembly and structural regulation of a hydrogen-bonded dimeric building block formed by two N-H…O hydrogen bonds on HOPG显示文摘The self-assembled behavior of an unsymmetric molecule(BCDTDA)with one imidazole group as center and benzoic acid group as functional group is studied,and the regulatory behaviors of coronene(COR)and three bipyridine derivatives(named BP,PEBP-C4 and PEBP-C8)on BCDTDA self-assembly structures are also investigated.Based on highly oriented pyrolytic graphite(HOPG)substrate,scanning tunneling microscopy(STM)is used to observe the variation of assembled behaviors at the solid-liquid interface.Because of the concentration effect,BCDTDA molecules can assemble into grids and Kagomés structures in the form of N–H…O hydrogen bonded dimers.BCDTDA molecules still maintain dimeric structures in the regulation of COR and BP molecules to BCDTDA self-assembly.However,PEBP-C4 and PEBP-C8 destroy the structure of the dimers,and form a variety of co-assembled structures with BCDTDA.Different guest molecules coordinate the host molecules differently,which makes the experiment more meaningful.Combined with density functional theory(DFT)calculation,the discovery of molecular interactions provides a promising strategy for the construction of functional nanostructures and devices. | Peng Lei Lin Ma Siqi Zhang Jianqiao Li Linlin Gan Ke Deng Wubiao Duan Wei Li Qingdao Zeng | 2023 | Chinese Chemical Letters2023，34，8： | 1 |
| 9 | Study onphase inversion characteristics of heavy oil emulsions显示文摘 | Duan Linlin Jing Jiaqiang Wang Jinzhu | 2010 | The International Society of Offshore and Polar En-gineers2010，6，： | 1 |
| 10 | Evaluation of fungal spore characteristics in Beijing, China, based on molecular tracer measurements显示文摘 | Linlin Liang Guenter Engling Kebin He Zhenyu Du Yuan Cheng Fengkui Duan | 2013 | Environmental Research Letters2013，，1： | 1 |
| 11 | Characteristics of 2-methyltetrols in ambient aerosol in Beijing, China显示文摘 | Linlin Liang Guenter Engling Fengkui Duan Yuan Cheng Kebin He | 2012 | Atmospheric Environment2012，，： | 1 |
| 12 | Effects of hot air drying temperature and tempering time on the properties of maize starch显示文摘Yellow maize as raw materials,hot air drying was used to reduce moisture content,and the tempering was implemented after drying.This study aimed to investigate the effects of hot air drying temperature and tempering time on the properties of maize starch.The wet milling was used to extract maize starch.Starch yield,protein content,amylose and amylopectin content,transparency and coagulation,solubility index and swelling power,color,pasting properties,and gelatinization properties were researched.The results showed that when the hot air temperature increased,the properties such as starch yield,amylopectin content,transparency,solubility,swelling power,whiteness decreased,and properties such as protein content and amylose content,coagulation,gelatinization temperature increased.Compared to drying temperature,tempering time has a less remarkable effect on the maize starch properties.The maize starch with better whiteness,solubility,swelling power could be obtained by adjusting tempering time. | Guangyue Ren Ledao Zhang Fanlian Zeng Yebei Li Linlin Li Xu Duan | 2020 | International Journal of Agricultural and Biological Engineering2020，13，6： | 0 |
| 13 | A comparative study on the genomes,transcriptomes,and metabolic properties of Escherichia coli strains Nissle 1917,BL21(DE3),and MG1655显示文摘Escherichia coli is the most well-studied model prokaryote and has become an indispensable host for the biotech-nological production of proteins and biochemicals.In particular,the probiotic status of one E.coli strain,E.coli Nissle 1917(EcN)has helped it become a new favorite amongst synthetic biologists.To broaden its potential applications,here we assemble a comparative study on the genomes,transcriptomes,and metabolic properties of E.coli strains EcN,BL21(DE3),and MG1655.Comparative genomics data suggests that EcN possesses 1404 unique CDSs.In particular,EcN has additional iron transport systems which endow EcN with a higher tolerance to iron scarcity when compared to two other E.coli strains.EcN transcriptome data demonstrates that E.coli strains EcN,BL21(DE3),and MG1655 all have comparable activities of the central metabolic pathway,however only EcN inherits the arginine deiminase pathway.Additionally,we found that EcN displayed a lower expres-sion of ribosomal proteins compared to BL21(DE3)and MG1655.This comparative study on E.coli strains EcN,BL21(DE3),and MG1655 aims to provide a reference for further engineering EcN as a biotechnological tool. | Linlin Zhao Guobin Yin Yonglin Zhang Chaofan Duan Yang Wang Zhen Kang | 2022 | Engineering Microbiology2022，2，1： | 0 |
| 14 | In vitro characterization of a nitro-forming oxygenase involved in 3-(trans-2’-aminocyclopropyl)alanine biosynthesis显示文摘In vitro characterization experiments revealed the formations of 3-(trans-2’-aminocyclopropyl)alanine((3-Acp)Ala)and 3-(trans-2’-nitrocyclopropyl)alanine((3-Ncp)Ala)are originated via two homologous proteins,BelK and HrmI,which regioselectively catalyze the N��-oxygenation of l-lysine.The two enzymes belong to the emerg-ing heme-oxygenase-like diiron oxidase and oxygenase(HDO)superfamily and the catalytic center of BelK is validated by homology modeling and site-directed mutations.Based on the in vitro characterization,the biosyn-thetic pathways of(3-Acp)Ala and(3-Ncp)Ala are proposed. | Linlin Pang Weijing Niu Yuwei Duan Liujie Huo Aiying Li Jiequn Wu Youming Zhang Xiaoying Bian Guannan Zhong | 2022 | Engineering Microbiology2022，2，1： | 0 |
| 15 | Centennial-scale monsoon collapses during Marine Isotope Stage(MIS)7e detected in a northern Chinese stalagmite record显示文摘Occurrence or absence of centennial-scale climatic variability during Marine Isotope Stage(MIS)7e,the first peak interval of the Penultimate Interglacial,remains ambiguous due to the limited available high-resolved records.Here,we present a decadal-resolved stalagmiteδ^(18)O record from northern China spanning from 242.3 to 236.8 ka BP,covering MIS7e.The composite KLSδ^(18)O record,integrating this study with the previous record in the same cave,shows a descending trend from TerminationⅢto MIS7e,which follows the increasing Northern Hemisphere summer insolation(NHSI).This observation further emphasizes the important influence of NHSI on the glacial/interglacial transition.There are more large-amplitude,millennial-to centennial-scale variability occurring during TerminationⅢcompared with MIS7e,implying that ice-sheet decay potentially plays an important role in climatic excursions.Four centennial-scale summer monsoon collapses,peaking at~242.1,~240.8,~239.3 and~238.2 ka BP,are detected in our new record,indicating the pervasiveness of the intra-interglacial climatic instability.Given the lack of solar activity and freshwater outbursts data during MIS7e,it is not possible to conclude about the drivers of the identified abrupt climatic anomalous.Following the dynamic mechanisms of sub-millennial climatic anomalous during early Holocene,we tentatively propose that slowdown of the meridional overturning circulation caused by freshwater fluxes into North Atlantic and/or attenuated solar irradiance is the potential forcing for the abrupt climate events within MIS7e.Additionally,attenuated solar irradiance could also result in climatic anomalies through low-latitude processes. | Wuhui DUAN Ming TAN Lisheng WANG Xuefeng WANG Zhibang MA Linlin CUI Zhengyi XIAO | 2023 | Science China Earth Sciences2023，66，12： | 0 |
| 16 | Re-Os isotopic dating and geological significance of molybdenite from Xintian Cu-Mo polymetallic deposit in Yanbian,Jilin显示文摘Xintian polymetallic deposit is a hydrothermal vein type Cu-Mo deposit. Analysis on Re-Os isotopic dating for the molybdenite from this deposit is undertaken to determine metallogenic epoch and dynamics setting of the deposit. Re-Os isotopic dating for the molybdenite yields model ages ranging from 123. 9 ± 1. 9 Ma to 124. 7 ± 1. 8 Ma,with a weighted mean age of 123. 4 ± 0. 81 Ma,and an isochron age of 127 ± 16 Ma,MSWD= 0. 25,indicating that the metallization was at late Yanshanian. The content of Re in molybdenite is( 330. 1± 4. 0--367. 9 ± 3. 1) × 10^(-6),which demonstrates mantle derived metallogenic sources. Integrating the regional tectonic evolution and the metallogenic characteristics of other contemporaneous Cu-Mo deposits in the region,it is suggested that the Cu-Mo mineralization of this deposit occurred in an active epicontinental environment under lithospheric extension resulted from the subduction of the Izanagi plate to the Paleo-Asia continental margin at late Yanshanian. The Mantle wedge was partially melted with large amount of metallogenic elements dissolved in it. Under the favorable conditions of crust-mantle interaction,large-scale magmatic activity turns out to be the important mechanism of the mineralization of many Cu-Mo deposits in the Xiaoxingan Range--Zhangguangcai Mountain metallogenic belt,including the Xintian Cu-Mo polymetallic deposit. | YIN Yue CUI Bo WANG Li WANG Linlin HUO Liang LI Liang DUAN Hongchang | 2018 | Global Geology2018，21，3： | 0 |
| 17 | Nanomaterials for lubricating oil application:A review显示文摘Friction and wear are ubiquitous,from nano-electro-mechanical systems in biomedicine to large-scale integrated electric propulsion in aircraft carriers.Applications of nanomaterials as lubricating oil additives have achieved great advances,which are of great significance to control friction and wear.This review focuses on the applications of nanomaterials in lubricating oil and comprehensively compares their tribological characteristics as lubricating oil additives.Statistical analysis of tribology data is provided and discussed accordingly;moreover,the interaction between nanomaterials and sliding surface,lubricating oil,other additives,and synergistic lubrication in nanocomposites are systematically elaborated.Finally,suggestions for future research on nanomaterials as lubricating oil additives are proposed.Hence,this review will promote a better fundamental understanding of nanomaterials for lubricating oil application and help to achieve the superior design of nanoadditives with outstanding tribological performances. | Linlin DUAN Jian LI Haitao DUAN | 2023 | Friction2023，11，5： | 0 |
| 18 | Autophagy induced by human adenovirus B7 structural protein VI inhibits viral replication显示文摘Human adenovirus B7(HAdV-B7)causes severe acute lower respiratory tract infections in children.However,neither the child-specific antivirals or vaccines are available,nor the pathogenesis is clear.Autophagy,as part of innate immunity,plays an important role in resistance to viral infection by degrading the virus and promoting the development of innate and adaptive immunity.This study provided evidence that HAdV-B7 infection induced complete autophagic flux,and the pharmacological induction of autophagy decreased HAdV-B7 replication.In this process,the host protein Bcl2-associated athanogene 3(BAG3)mediated autophagy to inhibit the replication of HAdV-B7 by binding to the PPSY structural domain of viral protein pVI through its WW structural domain.These findings further our understanding of the host immune response during viral infection and will help to develop broad anti-HAdV therapies. | Linlin Zhang Yali Duan Wei Wang Qi Li Jiao Tian Yun Zhu Ran Wang Zhengde Xie | 2023 | Virologica Sinica2023，38，5： | 0 |
| 19 | Unleash electron transfer in C–H functionalization by mesoporous carbon-supported palladium interstitial catalysts显示文摘The functionalization of otherwise unreactive C–H bonds adds a new dimension to synthetic chemistry,yielding useful molecules for a range of applications.Arylation has emerged as an increasingly viable strategy for functionalization of heteroarenes which constitute an important class of structural moieties for organic materials.However,direct bisarylation of heteroarenes to enable aryl-heteroaryl-aryl bond formation remains a formidable challenge,due to the strong coordination between heteroatom of N or S and transitional metals.Here we report Pd interstitial nanocatalysts supported on ordered mesoporous carbon as catalysts for a direct and highly efficient bisarylation method for five-membered heteroarenes that allows for green and mild reaction conditions.Notably,in the absence of any base,ligands and phase transfer agents,high activity(turn-over frequency,TOF,up to 107 h-1)and selectivity(>99%)for the 2,5-bisarylation of five-membered heteroarenes are achieved in water.A combination of characterization reveals that the remarkable catalytic reactivity here is attributable to the parallel adsorption of heteroarene over Pd clusters,which breaks the barrier to electron transfer in traditional homogenous catalysis and creates dual electrophilic sites for aryl radicals and adsorbate at C2 and C5 positions.The d-band filling at Pd sites shows a linear relationship with activation entropy and catalytic activity.The ordered mesopores facilitate the absence of a mass transfer effect.These findings suggest alternative synthesis pathways for the design,synthesis and understanding of a large number of organic chemicals by ordered mesoporous carbon supported palladium catalysts. | Xiaorui Zhao Yueqiang Cao Linlin Duan Ruoou Yang Zheng Jiang Chao Tian Shangjun Chen Xuezhi Duan De Chen Ying Wan | 2021 | National Science Review2021，8，4： | 0 |
| 20 | Material dependence of cities and implications for regional sustainability显示文摘Cities rely on massive amounts of physical,chemical,and biological resources to support their growth and metabolism.These‘metabolic inputs’are accumulated in cities to form material stocks in buildings,infrastructures,transportation facilities,and household appliances.This study takes China’s urbanization as an example to illustrate the characteristics of material stock changes in developing countries and compare them with those in developed countries.Results show that(1)material stocks have been growing in China,but have saturated in developed countries,and(2)the major components of urban metabolism are construction and industrial materials(e.g.,steel)in developing countries but biomass(e.g.,food)in developed countries.The changes in the magnitude and types of material stocks can not only measure urban development but also directly link city and its residents,offering advantages in representing urbanization over the existing indices such as population,land use,or gross domestic product(GDP).Given the new insights provided by material stock,we recommend to embrace it as a critical index of urbanization for guiding urban planning and policy-making. | Yupeng Liu Jiajia Li Linlin Duan Min Dai Wei-qiang Chen | 2020 | Regional Sustainability2020，1，1： | 0 |
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