|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Influence of phase and microstructure on the rate of hydrochloric acid leaching in pretreated Panzhihua ilmenite显示文摘The present study investigated the influence of high temperature oxidation and reduction pretreatments on the leaching rate of Panzhihua ilmenite.The as-pretreated ilmenite was leached with 20%HCl at 105℃.The leaching process was controlled by the phases and microstructures that evolved during the pretreatment processes.The leaching kinetics of pure hematite,ilmenite and pseudobrookite were characterized to clarify the phase effect on the iron-leaching rate;the rate of iron leaching occurs in the following order in the HCl solution:hematite(ferric iron) > ilmenite(ferrous iron)>>pseudobrookite(ferric iron).Therefore,the often-cited notion that ferrous iron dissolves faster in HCl solutions than ferric iron when explaining the pretreatment effects is inaccurate.Moreover,the oxidation pretreatment(at 600-1000℃ for 4 h)cannot destroy the dense structure of the Panzhihua ilmenite.Therefore,the influence exerted by the oxidation on the leaching process is primarily determined by the phase change;oxidation at 600 and 700℃slightly increased the rate of iron leaching because the ilmenite was transformed into hematite,while the oxidation at 900-1000℃ significantly reduced the rate of iron leaching because a pseudobrookite phase formed.The reduction effect was subsequently investigated;the as-oxidized ilmenite was reduced under H_2 at 750℃ for 30 min.The reduction significantly accelerated the rate of subsequent iron leaching such that nearly all of the iron had dissolved after leaching for 2h in 20%HCl at 105℃.This enhanced iron-leaching rate is mainly attributed to the cracks and holes that formed during the reduction process. | Qingshan Zhu Jianbo Zhang Hongzhong Li | 2014 | Particuology2014，12，3： | 11 |
| 2 | A new drag model for TFM simulation of gas-solid bubbling fluidized beds with Geldart-B particles显示文摘In this work,a new drag model for TFM simulation in gas-solid bubbling fluidized beds was proposed,and a set of equations was derived to determine the meso-scale structural parameters to calculate the drag characteristics of Geldart-B particles under low gas velocities.In the new model,the meso-scale structure was characterized while accounting for the bubble and meso-scale structure effects on the drag coefficient.The Fluent software,incorporating the new drag model,was used to simulate the fluidization behavior.Experiments were performed in a Plexiglas cylindrical fluidized bed consisting of quartz sand as the solid phase and ambient air as the gas phase.Comparisons based on the solids hold-up inside the fluidized bed at different superficial gas velocities,were made between the 2D Cartesian simulations,and the experimental data,showing that the results of the new drag model reached much better agreement with experimental data than those of the Gidaspow drag model did. | Yingce Wang Zheng Zou Hongzhong Li Qingshan Zhu | 2014 | Particuology2014，12，4： | 8 |
| 3 | Direct reduction of hematite powders in a fluidized bed reactor显示文摘Ultrafine hematite powder was reduced to produce ultrafine iron powder in a 50%Ar-50%H_2 atmosphere at 450-550℃ in a fluidized bed reactor.The ultrafine hematite powder shows the typical agglomerating fluidization behavior with large agglomerates fluidized at the bottom of the bed and small agglomerates fluidized at the upper part of the bed.It was found that defluidization occurred even at the low temperature of 450℃ with low metallization rate.Defluidization was attributed mainly to the sintering of the newly formed iron particles.Granuation was employed to improve the fluidization quality and to tackle the defluidization problem,where granules fluidized like a Geldart's group A powder.Granulation was found to effectively reduce defluidization during reduction,without however sacrificing reduction speed.The asreduced iron powders from both the ultrafine and the granulated hematite exhibited excellent sintering activity,that is,fast sintering at temperature of as low as^580σ_(RR)~2),which is much superior as compared to that of nano/ultrafine iron powders made by other processes. | Qingshan Zhu Rongfang Wua Hongzhong Li | 2013 | Particuology2013，11，3： | 8 |
| 4 | IL-17 induces radiation resistance of B lymphoma cells by suppressing p53 expression and thereby inhibiting irradiation-triggered apoptosis显示文摘p53 是著名肿瘤 suppressor。然而,为在 B 淋巴瘤房间的 p53 表示的规章的机制,和在在肿瘤房间的辐射抵抗的开发的 p53 的可能的角色大部分是未知的。一根人的 B 淋巴瘤房间线, Karpas1106 (k1106 ) ,被用作辐射抵抗的一个模型。k1106 房间的 Apoptosis 用流动 cytometry 被决定。p53 的表示用实时 RT-PCR 并且西方的弄污被估计。结果证明在 8Gy 的那照耀在多达 40 % 导致了 apoptosis;k1106 房间。同时,照耀显著地增加了 k1106 房间的 IL-6 生产。当 k1106 房间是有规章的 T 房间(Tregs ) 的 cocultured 并且照耀时, apoptotic k1106 房间的率显著地被减少,显示到照耀的一个获得的电阻。从对待照耀的 k1106 房间导出的 IL-6 在 Tregs 导致了 IL-17 表示。IL-17 + Foxp3 + T 房间在 k1106 房间压制了 p53 表示。一起,照耀 k1106 房间在 Tregs 导致 IL-17 的表示,它在 k1106 房间防碍 p53 蛋白质的表示并且从而镇压在 k1106 房间的被触发照耀的 apoptosis。 | Qingshan Li Xin Xu Weijie Zhong Qinghua Du Bizhen Yu Huabao Xiong | 2015 | Cellular & Molecular Immunology2015，12，3： | 8 |
| 5 | Progress of the satellite laser ranging system TROS1000显示文摘The mobile satellite laser ranging system TROS1000, successfully developed in 2010, achieves a high repetition rate and enables daytime laser ranging. Its measurement range has reached up to 36000 km with an accuracy as precise as 1 cm. Using recent observations in Wuhan, Jiufeng, Xianning, and Rongcheng, Shandong, we introduce the progress made using this mobile observation system. | Guo Tangyong Wang Peiyuan Li Xin Zhu Wei Zou Tong Li Shipeng Luo Qingshan | 2015 | Geodesy and Geodynamics2015，6，1： | 7 |
| 6 | Study on nitrobenzene ratio in water-ice system under different conditions显示文摘A series of ice freezing-thawing experiments are performed under different nitro- benzene concentrations of 1.7, 8, 17, 170, and 1700 μg/L. A special flume, made of stainless steel and glass, is built to simulate the flowing water for the experiments. The ice frozen in cold room has similar crystal structure of natural ice, therefore the behaviors of nitrobenzene in the ice frozen in cold room is also believed to be similar to that in natural ice. The results of the experiments reveal that the freezing rate of ice decreases with the increase of nitrobenzene concentration in water, and that the nitrobenzene ratio in water-ice system becomes higher with the increase of freezing rate. In addition, the nitrobenzene in ice does not move and is only re- leased into water after melt. | LI ZhiJun WANG Xin LI QingShan XU ShiGuo XU XiangZhou BAI Yan | 2008 | Science China(Technological Sciences)2008，51，11： | 6 |
| 7 | Microstructure and mechanical behavior of the Mg-Mn-Ce magnesium alloy sheets显示文摘The microstructural evolution and mechanical behavior of Mg-Mn-Ce magnesium alloy were investigated in the present study.Mg alloy was prepared with metal model casting method and subsequently hot extruded at 703 K with the reduction ratio of 101:1.The grains were dynamically recrystallized after the extrusion process.Moreover,the(0002)pole figure of Mg-Mn-Ce alloy developed a splitting of pronounced basal texture.The mechanical properties were different due to different angles between c-axis and loading direction(0°,45°and 90°)in the tensile tests.This significantly induces an asymmetry in the yield behavior.The Mg-Mn-Ce alloy exhibits a classical dimple structure as a result of slip accumulation and ductile tear. | Qingshan Yang Bin Jiang Xin Li Hanwu Dong Wenjun Liu Fusheng Pan | 2014 | Journal of Magnesium and Alloys2014，2，1： | 6 |
| 8 | Parallel selection of distinct Tof5 alleles drove the adaptation of cultivated and wild soybean to high latitudes显示文摘Photoperiod responsiveness is a key factor limiting the geographic distribution of cultivated soybean and its wild ancestor.In particular,the genetic basis of the adaptation in wild soybean remains poorly understood.In this study,by combining whole-genome resequencing and genome-wide association studies we identified a novel locus,Time of Flowering 5(Tof5),which promotes flowering and enhances adaptation to high latitudes in both wild and cultivated soybean.By genomic,genetic and transgenic analyses we showed that Tof5 en-codes a homolog of Arabidopsis thaliana FRUITFULL(FUL).Importantly,further analyses suggested that different alleles of Tof5 have undergone parallel selection.The Tof5H1 allele was strongly selected by humans after the early domestication of cultivated soybean,while Tof5H2 allele was naturally selected in wild soybean,and in each case facilitating adaptation to high latitudes.Moreover,we found that the key flowering repressor E1 suppresses the transcription of Tof5 by binding to its promoter.In turn,Tof5 physically associates with the promoters of two important FLOWERING LOCUS T(FT),FT2a and FT5a,to upregulate their transcription and promote flowering under long photoperiods.Collectively,ourfindings provide insights into how wild soybean adapted to high latitudes through natural selection and indicate that cultivated soybean underwent changes in the same gene but evolved a distinct allele that was artificially selected after domestication. | Lidong Dong Qun Cheng Chao Fang Lingping Kong Hui Yang Zhihong Hou Yongli Li Haiyang Nan Yuhang Zhang Qingshan Chen Chunbao Zhang Kun Kou Tong Su Lingshuang Wang Shichen Li Haiyang Li Xiaoya Lin Yang Tang Xiaohui Zhao Sijia Lu Baohui Liu Fanjiang Kong | 2022 | Molecular Plant2022，15，2： | 5 |
| 9 | Synthesis, bioactivity, action mode and 3D-QSAR of novel anthranilic diamide derivatives显示文摘To study the pesticide effect, action mode, structure-activity relationships (SARs) of anthranilic diamide insecticide and screen highly active pesticides, novel anthranilic diamide derivatives were synthesized.Bioassays indicated that all of the title compounds displayed 100% mortality against diamondback moth and oriental armyworm at 100 mg/L, among which 12 v and 12 w showed 100% insecticidal acitvity at 5 mg/L. Surprisingly compound 12 w exhibited better insecticidal acitvity than commercialized chlorantraniliprole against Pyrausta nubilalis (0.1 mg/L) and Cnaphalocrocis Medinalis (2 mg/L). 3 D-QSAR and SARs statistical analysis revealed that title compounds with R^2 fixed as methoxy had the highest probability possessing high activity. The calcium fluorescence measurements on neurons revealed that E series compounds containing pyrazinyl may have a molecular target different from caffeine on ryanodine receptors rather than the voltage-gated calcium channel present on cytomembran. | Weijie Liu Jiao Li Kai He Fangfang Huang Yi Ma Yuxin Li Qingshan Li Fengbo Xu | 2019 | Chinese Chemical Letters2019，30，2： | 4 |
| 10 | Preparation of nano-sized tungsten carbide via fluidized bed显示文摘Ultrafine or nano-sized of tungsten carbide(WC)is the key material to prepare ultrafine grained cemented carbides.In this paper,nano-sized WC powders were directly prepared by using industrial nano-needle violet tungsten oxide(WO2.72)as the raw material,a fluidized bed as the reactor,and CO as the carbonization gas.The relationship between particle sizes and reaction temperatures,residence times,atmospheres has been investigated systematically.In addition,the physical–chemical indexes(such as residual oxygen,total carbon and free carbon)of the products were measured.The results indicated that the particle size of WC increased with the increase of temperature from 800 to 950°C.As the residence time increased,the particle size decreased gradually,and then increased due to slight sintering.The introduction of hydrogen reduced the carbonization rate,and is not beneficial to obtaining nano-sized WC.Products that satisfy the standard were obtained when WO2.72 reacted with CO at 850°C,900°C and 950°C for 3.0 h,2.5 h and 2.0 h,respectively.The particle sizes of the three samples calculated from the specific surface area were 46.4 nm,53.2 nm and 52.1 nm,respectively. | Feng Pan Zhan Du Shaofu Li Jun Li Meiju Zhang Maoqiao Xiang Qingshan Zhu | 2020 | Chinese Journal of Chemical Engineering2020，28，3： | 4 |
| 11 | Carbon deposition and catalytic deactivation during CO_2 reforming of CH_4 over Co/MgO catalyst显示文摘The deactivation mechanism of Co/MgO catalyst for the reforming of methane with carbon dioxide was investigated. The conversion of CH4 displayed a significant decrease in the initial stage caused by carbon deposition.There were two types of cokes, carbon nanotubes(CNTs) and carbon nano-onions(CNOs). The number of the CNO layers that coated on the surface of Co nanoparticles(NPs) increased rapidly in the initial reforming time,which was responsible for the deactivation of the Co/MgO catalyst. The deposition of CNOs was attributed to the oxidation of Co NPs. Therefore, the deactivation of the Co/MgO catalyst was originated from the first oxidization of the Co NPs into Co3 O4 by O species(OH intermediate, CO_2, H2 O) during the reforming reaction,which accelerates the formation of coke that blocked the active metal, thus led to catalyst deactivation. | Jianwei Li Jun Li Qingshan Zhu | 2018 | Chinese Journal of Chemical Engineering2018，26，11： | 4 |
| 12 | Simultaneous Extraction of Carboxylated Celulose Nanocrystals and Nanofibrils via Citric Acid Hydrolysis--A Sustainable Route显示文摘In this study, cellulose nanocrystals(CNC) with surface carboxylic groups were prepared from bleached softwood pulp by hydrolysis with concentrated citric acid at concentrations of 60 wt%~80 wt%. The solid residues from acid hydrolysis were collected for producing cellulose nanofibrils(CNF) via post high-pressure homogenization. Citric acid could be easily recovered after hydrolysis reactions through crystallization due to its low water solubility or through precipitation as a calcium salt followed by acidification. Several important properties of CNC and CNF, such as dimension, crystallinity, surface chemistry, thermal stability, were evaluated. Results showed that the obtained CNC and CNF surfaces contained carboxylic acid groups that facilitated functionalization and dispersion in aqueous processing. The recyclability of citric acid and the carboxylated CNC/CNF give the renewable cellulose nanomaterial huge potential for a wide range of industrial applications. Furthermore, the resultant CNC and CNF were used as reinforcing agents to make sodium carboxymethyl cellulose(CMC) films. Both CNC and CNF showed reinforcing effects in CMC composite films. The tensile strength of CMC films increased by 54.3% and 85.7% with 10 wt% inclusion of CNC and CNF, respectively. This study provides detailed information on carboxylated nanocellulose prepared by critic acid hydrolysis; a sustainable approach for the preparation of CNC/CNF is of significant importance for their various uses. | Chao Liu HaiShun Du Guang Yu YueDong Zhang QingShan Kong Bin Li XinDong Mu | 2017 | Paper And Biomaterials2017，2，4： | 4 |
| 13 | Rituximab or irradiation promotes IL-17 secretion and thereby induces resistance to rituximab or irradiation显示文摘Lymphoma is a hematological malignancy that involves T or B cells.Diffuse large B-cell lymphoma(DLBCL)accounts for~40%of cases of non-Hodgkin’s lymphoma(NHL)and is a highly aggressive and heterogeneous subtype of NHL.1 The pathogenesis of DLBCL remains unclear.DLBCL is also closely related to inflammatory factors and immune cells in the tumor microenvironment(TME),and alterations of the cytokine network in the TME may activate oncogenes or inactivate tumor suppressor genes.2–4 In the TME,a variety of immune cells and cytokines have crucial roles in the pathogenesis of tumors. | Weijie Zhong Qingshan Li | 2017 | Cellular & Molecular Immunology2017，14，12： | 4 |
| 14 | A two-stage reduction process for the production of high-purity ultrafine Ni particles in a micro-fluidized bed reactor显示文摘A novel two-stage reduction process for synthesis of ultrafine nickel powder with a high purity and low density in a fluidized bed reactor has been developed in this work.The raw ultrafine NiO particles are first pre-reduced using hydrogen at lower temperatures(340-400 ℃),followed by further reduction at higher temperatures(500-600 ℃).The self-agglomeration of Ni particles formed during low-temperature reduction decreases the sintering activity of the newly formed ultrafine Ni particles,leading to good fluidization quality,even for the subsequent high-temperature reduction process.The agglomerated Ni particles have a high Ni content(above 99wt%),a low density(0.78 g/cm^3) and a uniform particle size(approximately 100μm).A concept design for a novel two-stage fluidized bed reactor process used to produce high-purity Ni powder was also proposed.This approach may be extended to the synthesis of other ultrafine/nanosized metals or metal oxides through a fluidization method. | Jun Li Xinwei Liu Li Zhou Qingshan Zhu Hongzhong Li | 2015 | Particuology2015，13，2： | 4 |
| 15 | Enhanced production of seed oil with improved fatty acid composition by overexpressing NAD^(+)-dependent glycerol-3-phosphate dehydrogenase in soybean显示文摘There is growing interest in expanding the production of soybean oils(mainly triacylglycerol, or TAG) to meet rising feed demand and address global energy concerns. We report that a plastidlocalized glycerol-3-phosphate dehydrogenase(GPDH), encoded by GmGPDHp1 gene, catalyzes the formation of glycerol-3-phosphate(G3 P), an obligate substrate required for TAG biosynthesis.Overexpression of GmGPDHp1 increases soybean seed oil content with high levels of unsaturated fatty acids(FAs), especially oleic acid(C18:1), without detectably affecting growth or seed protein content or seed weight. Based on the lipidomic analyses, we found that the increase in G3 P content led to an elevated diacylglycerol(DAG) pool, in which the Kennedy pathwayderived DAG was mostly increased, followed by PC-derived DAG, thereby promoting the synthesis of TAG containing relatively high proportion of C18:1. The increased G3 P levels induced several transcriptional alterations of genes involved in the glycerolipid pathways. In particular, genes encoding the enzymes responsible for de novo glycerolipid synthesis were largely upregulated in the transgenic lines, in-line with the identified biochemical phenotype. These results reveal a key role for GmGPDHp1-mediated G3 P metabolism in enhancing TAG synthesis and demonstrate a strategy to modify the FA compositions of soybean oils for improved nutrition and biofuel. | Ying Zhao Pan Cao Yifan Cui Dongxu Liu Jiapeng Li Yabin Zhao Siqi Yang Bo Zhang Runnan Zhou Minghao Sun Xuetian Guo Mingliang Yang Dawei Xin Zhanguo Zhang Xin Li Chen Lv Chunyan Liu Zhaoming Qi Jingyu Xu Xiaoxia Wu Qingshan Chen | 2021 | Journal of Integrative Plant Biology2021，63，6： | 4 |
| 16 | Hydrodynamic behavior of magnetized fluidized beds with admixtures of Geldart-B magnetizable and nonmagnetizable particles显示文摘 | Quanhong Zhu Hongzhong Li Qingshan Zhu Jun Li Zheng Zou | 2016 | Particuology2016，14，6： | 4 |
| 17 | GmCRY1s modulate gibberellin metabolism to regulate soybean shade avoidance in response to reduced blue light显示文摘Soybean is an important legume crop that displays the classic shade avoidance syndrome(SAS),including exaggerated stem elongation,which leads to lodging and yield reduction under density farming conditions.Here,we compared the effects of two shade signals,low red light to far-red light ratio(R:FR)and low blue light(LBL),on soybean status and revealed that LBL predominantly induces excessive stem elongation.We used CRISPR-Cas9-engineered Gmcry mutants to investigate the functions of seven cryptochromes(GmCRYs)in soybean and found that the four GmCRY1s overlap in mediating LBL-induced SAS.Lightactivated GmCRY1s increase the abundance of the bZlP transcription factors STF1 and STF2,which directly upregulate the expression of genes encoding GA2 oxidases to deactivate GA1 and repress stem elongation.Notably,GmCRY1b overexpression lines displayed multiple agronomic advantages over the wild-type control under both dense planting and intercropping conditions.Our study demonstrates the integration of GmCRY1-mediated signals with the GA metabolic pathway in the regulation of LBL-induced SAS in soybean.It also provides a promising option for breeding lodging-resistant,high-yield soybean cultivars in the future. | Xiangguang Lyu Qican Cheng Chao Qin Yinghui Li Xinying Xu Ronghuan Ji Ruolan Mu Hongyu Li Tao Zhao Jun Liu Yonggang Zhou Haiyan Li Guodong Yang Qingshan Chen Bin Liu | 2021 | Molecular Plant2021，14，2： | 4 |
| 18 | Coprinus comatus-derived nitrogen-containing biocarbon electrocatalyst with the addition of self-generating graphene-like support for superior oxygen reduction reaction显示文摘The development of nitrogen-rich biomassderived carbon catalysts provides an attractive perspective to substitute for Pt-based electrocatalysts for oxygen reduction reaction(ORR). We here report a facile strategy for synthesis of a nitrogen-doped biocarbon/graphene-like composite electrocatalyst by pyrolyzing a solid-state mixture of coprinus comatus biomass and melamine under nitrogen protection. The graphtic carbon nitride formed by polycondensation of melamine at 600 °C acts as a selfsacrificing template to generate the nitrogen-doped graphene-like sheet, which can function as an inserting agent and self-generating support. The composite catalyst exhibits the most promising catalytic activity towards the fourelectron ORR with a half-wave potential of around 0.83 V(vs. RHE), and more excellent stability and tolerance to methanol/ethanol compared to the commercial Pt/C catalyst. It is interestingly found that both a higher content of nitrogen and a larger ratio of graphitic-nitrogen species,which may derive from self-addition of graphene-like support into the catalyst, can effectively improve the electrocatalytic activity. The planar N group may be the nitrogen functionality that is most responsible for maintaining the ORR activity in alkaline medium. This study can largely encourage the exploration of high-performance carbon-based catalysts from economical and sustainable fungus biomass. | Chaozhong Guo Wenli Liao Zhongbin Li Lingtao Sun Haibo Ruan Qingshan Wu Qinghong Luo Jie Huang Changguo Chen | 2016 | Science Bulletin2016，61，12： | 4 |
| 19 | Statistical spectrum model of wind velocity at Beijing Meteorological Tower显示文摘The wind velocity spectra at Beijing Meteorological Tower are calculated using Hilbert-Huang transform and Fourier transform,respectively.A innovative model of wind velocity spectrum,which is accordant with the characteristics in both the inertial subrange and the large eddies range,is presented in this paper.The method of least squares is adopted to obtain the parameters in the model.Then the differences between the FFT spectrum and the HHT spectrum are compared.It is indicated that the values of the HHT spectrum in the energy containing range are slightly larger than those of the FFT spectrum while the values of the HHT spectrum in both inertial subrange and dissipation subrange are very close to that of Fourier spectrum.It is concluded that the HHT spectrum describes elaborately and accurately the spectrum values in the low frequencies and the fitted wind velocity model provides a reference for reconstructing the near-ground wind field of Beijing city in wind tunnel test and for numerical simulation. | TIAN YuJi YANG QingShan YANG Na LI Bo CHEN Bo | 2011 | Science China(Technological Sciences)2011，54，11： | 3 |
| 20 | The genetic architecture of growth traits in Salix matsudana under salt stress显示文摘Willow(Salix)is one of the most important ornamental tree species in landscape plants.One species,Salix matsudana,is widely used as a shade tree and border tree because of its soft branches and plump crown.Some varieties of S.matsudana were salt tolerant and could grow normally in coastal regions.However,the molecular mechanisms of salt tolerance for S.matsudana have been less clear.Here,we addressed this issue by performing a mapping experiment containing 195 intraspecific F1 progeny of S.matsudana,derived from salt-sensitive‘yanjiang’and salt-tolerant‘9901’,grown by cuttings in a 100 mM NaCl solution.Growth performance of these progeny under salt stress was investigated,displaying marked genotypic variability with the coefficients of variance of 28.64–86.11%in shoot and root growth traits.We further mapped specific QTLs contributing to these differences to the Salix genome.Of the 204 QTLs identified,a few were detected to explain a remarkably larger portion of the phenotypic variation than many others.Many detected QTLs were found to reside in the region of candidate genes of known biological function.The discovery of growth QTLs expressed under salt stress provides important information for marker-assisted breeding of salt tolerant Salix varieties and founds the basis for the application of S.matsudana in coastal afforestation. | Jian Zhang Huwei Yuan Qingshan Yang Min Li Ying Wang Yujuan Li Xiangjian Ma Feng Tan Rongling Wu | 2017 | Horticulture Research2017，4，1： | 3 |
您所在的机构暂未开通此部分的功能，请联系管理员