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25篇 您的检索式:作者名="LIU QINGXI"
    题名 作者 年代 出处 被引量
1The WRKY Gene Family in Rice (Oryza sativa)显示文摘WRKY 基因编码涉及各种各样的生物学过程的规定的抄写因素。这些锌手指蛋白质,特别调停的那些成员强调回答,特别地在植物被扩展。便于进化历史的学习和这个超级基因家庭的功能,我们用 HMMER 和明确地为米饭被训练的一个隐藏的 Markov 模型为 WRKY 基因执行了彻底的搜索。这个工作在 Oryza sativa L 导致了 WRKY 基因模型的一张全面的表。ssp。indica 和 L。ssp。装饰用的梨树。这些基因印射,导致 98 的鉴定单个染色体便于消除在装饰用的梨树的冗余的 WRKY 基因并且 102 在 indica 米饭。这些基因进一步根据他们的锌手指领域的数字和结构被分类。在相应 indica 和装饰用的梨树染色体上基于保存 WRKY 领域的一棵系统树和 WRKY loci 的图形的显示,我们识别了可能的 WRKY 在内的基因复制,和在二密切相关的米饭亚种之间的损失。另外考察了在到水杨酸和 jasmonic 酸,种子发展和萌芽的抗病性和回答的 WRKYgenes 的角色被赤霉素,包括老朽的另外的发展过程,和对不能生活的压力和 abscisic 酸的回答在大米和另外的工厂调停。发信号小径调停 WRKY 基因表示也被讨论……Christian A. Ross Yue Liu Qingxi J. Shen 2007Journal of Integrative Plant Biology2007,49,6:97
2A novel design of 3D carbon host for stable lithium metal anode显示文摘Rational design of porous conductive hosts with high electrical conductivity,large surface area,and adequate interior space is desirable to suppressing dendritic lithium growth and accommodating large volume change of lithium metal anode during the Li plating/stripping process.However,due to the conductive nature of the conductive hosts,Li is easily deposited directly on the top of the hosts,which hinders it from fully functioning.To circumvent the issue,in this study,we designed a novel porous carbon host with a gradient-pore-size structure based on one-dimensional(1D)carbon with different diameters.With this kind of host,stable cycling with high and stable Coulombic efficiency of~98%is achieved at 0.5 mA cm^(−2) with an areal capacity of 1 mAh cm^(−2) over 320 cycles.In contrast,the normal three-dimensional(3D)carbon nanotube host presents a moss-like Li morphology with wildly fluctuating Coulombic efficiency after 100 cycles.The results reveal that the unique gradient-pore-size structure of the 3D conductive host greatly improves the performance of lithium metal batteries.Hang Liu Jie Di Ping Wang Rui Gao Han Tian Pengfei Ren Qingxi Yuan Wanxia Huang Ruiping Liu Qiang Liu Ming Feng 2022Carbon Energy2022,4,4:5
3Effects of L-3-n-butylphthalide on caspase-3 and nuclear factor kappa-B expression in primary basal forebrain and hippocampal cultures after beta-amyloid peptide 1-42 treatment显示文摘BACKGROUND:L-3-n-butylphthalide(L-NBP) can inhibit phosphorylation of tau protein and reduce the neurotoxicity of beta-amyloid peptide 1-42(Aβ_(1-42)). OBJECTIVE:To observe the neuroprotective effects of L-NBP on caspase-3 and nuclear factor kappa-B(NF-κB) expression in a rat model of Alzheimer's disease. DESIGN,TIME AND SETTING:A cell experiment was performed at the Central Laboratory of Provincial Hospital affiliated to Shandong University between January 2008 and August 2008. MATERIALS:L-NBP(purity>98%) was provided by Shijiazhuang Pharma Group NBP Pharmaceutical Company Limited.Aβ_(1-42),3-[4,5-dimethylthiazolo-2]-2,5 iphenyltetrazolium bromide(MTT),and rabbit anti-Caspase-3 polyclonal antibody were provided by Cell Signaling, USA;goat anti-choactase and rabbit anti-NF-κB antibodies were provided by Santa Cruz,USA. METHODS:Primary cultures were generated from rat basal forebrain and hippocampal neurons at 17 or 19 days of gestation.The cells were assigned into five groups:the control group,the Aβ_(1-42) group(2μmol/ L),the Aβ_(1-42) + 0.1μmol/L L-NBP group,the Aβ_(1-42)+ 1μmol/L L-NBP group,and the Aβ_(1-42)+ 10μmol/L L-NBP group.The neurons were treated with Aβ_(1-42)(2μmol/L) alone or in combination with L-NBP(0.1,1,10μmol/L) for 48 hours.Cells in the control group were incubated in PBS. MAIN OUTCOME MEASURES:Morphologic changes were evaluated using inverted microscopy, viability using the MTT method,and the changes in caspase-3 and NF-κB expression using Western blot. RESULTS:Induction with Aβ_(1-42) for 48 hours caused cell death and soma atrophy,and increased caspase-3 and NF-κB expression(P<0.05).L-NBP blocked these changes in cell morphology, decreased caspase-3 and NF-κB expression(P<0.05),and improved cell viability,especially at the high dose(P<0.05). CONCLUSION:Aβ_(1-42) is toxic to basal forebrain and hippocampal primary neurons;L-NBP protects against this toxicity and inhibits the induction of caspase-3 and NF-κB expression.Ruixia Wang Yong Zhang Liangliang Jiang Guozhao Ma Qingxi Fu Jialong Li Peng Yan Lunqian Shen Yabo Feng Chunxia Li Zaiying Pang Yuanxiao Cui Chunfu Chen Yifeng Du Zhaokong Liu 2009Neural Regeneration Research2009,4,4:3
4Mild hypothermia effects on matrix metalloproteinase-9 expression in the perihematomal region of rats following experimental intracerebral hemorrhage显示文摘BACKGROUND: Matrix metalloproteinase-9 (MMP-9) expression increases with intracerebral hemorrhage, and participates in the pathophysiological processes of secondary brain injury after intracerebral hemorrhage. OBJECTIVE: To investigate the effects of mild hypothermia on MMP-9 expression and brain edema in the perihematomal region of experimental intracerebral hemorrhage rats. DESIGN, TIME AND SETTING: The randomized, controlled experiment was performed at the Central Laboratory of Shandong Provincial Hospital between May and September 2007. MATERIALS: Seventy-two, Wistar, male rats, 12-weeks old, were used for this study. Rabbit anti-MMP-9 primary antibody was purchased from Boster, China. METHODS: Wistar rats were equally and randomly divided into normothermia and mild hypothermia groups. The two groups each comprised control, 6-hour intracerebral hemorrhage, 24-hour intracerebral hemorrhage, 48-hour intracerebral hemorrhage, 72-hour intracerebral hemorrhage, and 1-week intracerebral hemorrhage subgroups, with six rats in each subgroup. Rat models of intracerebral hemorrhage were established by injecting 100 μL of autologous blood into the rat caudate nucleus. Rats in the mild hypothermia group received four hours of local mild hypothermia immediately following the injection. Intracerebral temperature was maintained at (33 ± 0.5) ℃. Subsequently, intracerebral temperature was spontaneously recovered at 25 ℃. Rats in the control subgroup were not injected with autologous blood and received only with intracerebral hemorrhage. MAIN OUTCOME MEASURES: Brain water content and MMP-9 expression surrounding the hematoma region. RESULTS: MMP-9 expression increased at 6 hours, and brain edema reached a peak at 48 hours after intracerebral hemorrhage. MMP-9 expression was significantly decreased in the mild hypothermia group compared with the normothermia group at each time point (P < 0.05). CONCLUSION: Mild hypothermia can significantly inhibit MMP-9 overexpression and relieve brain edema following intracerebral hemorrhage.Minzhong Wang Xiaoyan Lin Xueping Liu Qingxi Fu Suming Zhang 2008Neural Regeneration Research2008,3,7:2
5Effects of Mg-based Alkaline Peroxide Bleaching on Physical Properties of Poplar Bleached Chemi-thermomechanical Pulp and Its Influence Mechanism显示文摘In this study,Mg O was partially used as an alkali source in the peroxide bleaching process of bleached chemi-thermomechanical pulp(BCTMP).The effects of substitution percentage of Mg O for Na OH on the bulk,optical,and physical properties of bleached pulp,and the main effluent characteristics were analyzed.In addition,the influencing mechanism of Mgbased alkali on the strength properties of the BCTMP was further investigated.Strength properties of the BCTMPs were investigated as a function of charge characteristics,fiber morphology,surface lignin content,relative bonding area,and hydrogen bonds of the BCTMP.The results showed that cationic demand(CD) and chemical oxygen demand(COD_(Cr)) of the bleaching effluent decreased as the substitution percentage of Mg O for Na OH increased; meanwhile,the bulk and optical properties of the BCTMP increased.Nevertheless,the strength properties(tensile,tear,and burst indices) of the bleached pulp decreased as the substitution percentage of Mg O for Na OH increased.The decrease in the fiber charge density and increase in the surface lignin content affected the fiber swelling,resulting in a decline in pulp interfibers bonding strength and further loss of the tensile and burst indices.Wei Liu Song Han LiGuo Zhang QingXi Hou 2018Paper And Biomaterials2018,3,3:2
6Interannual Variability and Scenarios Projection of Sea Ice in Bohai Sea Part Ⅰ: Variation Characteristics and Interannual Hindcast显示文摘The Bohai Sea is one of the southernmost areas for sea ice formation in the northern hemisphere.Sea ice disasters in this body of water severely affect marine activities and the safety of coastal residents.In this study,we analyze the variation characteristics of the sea ice in the Bohai Sea and establish an annual regression model based on predictable mode analysis method.The results show the following:1)From 1970 to 2018,the average ice grade is(2.6±0.8),with a maximum of 4.5 and a minimum of 1.0.Liaodong Bay(LDB)has the heaviest ice conditions in the Bohai Sea,followed by Bohai Bay(BHB)and Laizhou Bay(LZB).Interannual variation is obvious in all three bays,but the linear decreasing trend is significant only in BHB.2)Three modes are obtained from empirical orthogonal function analysis,namely,single polarity mode with the same sign of anomaly in all of the three bays and strong interannual variability(82.0%),the north–south dipole mode with BHB and LZB showing an opposite sign of anomalies to that in LDB and strong decadal variations(14.5%),and a linear trend mode(3.5%).Critical factors are analyzed and regression equations are established for all the principal components,and then an annual hindcast model is established by synthesizing the results of the three modes.This model provides an annual spatial prediction of the sea ice in the Bohai Sea for the first time,and meets the demand of operational sea ice forecasting.JIAO Yan HUANG Fei LIU Qingrong LI Ge LI Yaru YU Qingxi ZHAO Yiding 2020Journal of Ocean University of China2020,19,2:2
7Rheological and mechanical properties of PVC/CaCO3 nanocomposites prepared by in situ polymerization 显示文摘XIE Xiaolin LIU Qingxi LI R K Y 2004Polymer2004,45,19:1
8Rheological and mechanical properties of PVC/CaCO3 nanocomposites prepared by in situ polymerization 显示文摘Xiaolin Xie Qingxi Liu RortKwok-Yiu Li 2004Polymer2004,,15:1
9Rheological and mechanical properties of PVC/CaCO3 nanocomposites prepared by in situ polymerization 显示文摘XIE Xiaolin LIU Qingxi LI R K 2004Polymer2004,45,19:1
10Characteristics of antimicrobial fibers prepared with wood periodate oxycellulose 显示文摘HOU Qingxi LIU Wei LIU Zehua 2008Carbohydrate Polymers2008,,74:1
11Rheological and mechanical properties of PVC/CaCO3 nanocomposites prepared by in-situ polymerization显示文摘XIE Xiaolin LIU Qingxi Robert Kwok-Yiu Li 2004Polymer2004,45,17:1
12Structure property relationships of in situ PMMA modified nano-sized antimony trioxide filled poly ( vinylchloride ) nanocomposites 显示文摘XIE Xiaolin LI R K Y LIU Qingxi 2004Polymer2004,45,8:1
13Structure-property relationships of in-situ PMMA modified nano-sized antimony trioxide filled poly(vinyl choloride) nanocomposites显示文摘XIE XIAOLIN LI ROBERT KWOKYIU LIU QINGXI 2004Polymer2004,45,:1
14Simulating net primary production and soil-surface CO2 flux of temperate forests in northeastern China显示文摘LIU Xi GUO Qingxi WANG Chuankuan 2011Scandinavian Journal of Forest Research2011,26,1:1
15Relating soil surface moisture to reflectance显示文摘Liu Weidong F. Baret Gu Xingfa Tong Qingxi Zheng Lanfen Zhang Bing 2002Remote Sensing of Environment2002,,2:1
16Rheological and mechanical properties of PVC/CaCO3 nanocomposites prepared by in situ polymerization显示文摘Xie Xiaolin Liu Qingxi Robert Kwok-Yiu Li 2004Polymer2004,45,19:1
17Seeding performance of air-assisted centralized seed-metering device for rapeseed显示文摘In order to analyze seed movement characteristics and improve seeding quality of air-assisted centralized metering device for rapeseed,the effects of the model-hole structure on seed feeding performance were investigated using EDEM simulation.Furthermore,the CFD-DEM coupling approach was applied to determine movement trajectories and airflow fields.The impacts of rapeseed varieties and rotational speed on seeding performance were investigated by bench tests.The results showed that the seed feeding quantity increased with the increase of model-hole’s length,depth and section size.Under the model-hole’s depth of 3.0 mm,the type II model-hole and model-hole’s length of 10 mm,both the variation coefficient of seed feeding quantity and hill diameter were lower which meet the seeding quantity requirement of 2 seeds in each hill.It was revealed that the seed population migrated in a large airflow velocity area and the distribution was uniform.The bench tests indicated that rapeseed varieties and rotational speed had a significant effect on the seed feeding quantity in each hill at rotational speed of 10-40 r/min.The variation coefficient of seed feeding quantity in each hill was less than 17.0%for each treatment.The hill diameter,which did not exceed 3.5 cm,tended to reduce with increasing rotational speed.The variation coefficient of seeding quantity in each row and seeding uniformity was less than 6.5%and 32.0%,respectively.Field experiments demonstrated that the seedling was 9-13 plants per meter each row for three rapeseed varieties.The variation coefficient of plants was less than 25.0%for six rows and their yields reached 2761 kg/hm2,which realized the mechanized planting requirements.The results can optimize structure of an air-assisted centralized metering system and improve seeding performance.Xiaolong Lei Hongji Hu Wenhao Yang Liyang Liu Qingxi Liao Wanjun Ren 2021International Journal of Agricultural and Biological Engineering2021,14,5:1
18A novel nanoporous Mg-Li material for efficient hydrogen generation显示文摘Hydrogen generation material is a new kind of energy material that can supply hydrogen by reacting with water and is drawing more and more attention with the development of hydrogen economy. In this study, a novel nanoporous magnesium-lithium material prepared by a physical vapor deposition method exhibits an excellent hydrogen generation property. It generates hydrogen efficiently and quickly with saltwater, reaching a hydrogen generation amount of 962 mL g^(-1) and hydrogen generation rates of 60 mL g^(-1)min^(-1), 109 mL g^(-1)min^(-1),256 mL g^(-1)min^(-1) and 367 mL g^(-1)min^(-1) at 0 ℃, 25 ℃, 35 ℃ and 50 ℃, respectively. The nanoporous magnesium-lithium material is composed of a solid solution phase with a magnesium-lithium atomic ratio of 17:3. By synchrotron radiation analysis, the sizes of the nanopores are in the range of 100 nm ~ 600 nm with an average size of 280 nm, and the porosity is calculated to be ~42.4%. The improved hydrogen generation property is attributed to the nanoporous structure with a high specific surface area, and the addition of lithium element which acts as active sites in hydrogen generation process.Jingru Liu Qingxi Yuan Wangxia Huang Xiping Song 2022Journal of Magnesium and Alloys2022,10,11:0
19Antiproliferative Triterpenoid Saponins from Leptaulus citroides Baill. from the Madagascar Rain Forest显示文摘Bioassay-guided fractionation of EtOH extracts obtained from the roots and wood of the Madagascan plant Leptaulus citroides Baill.(Cardiopteridaceae)led to the isolation of ethyl esters of three new triterpenoid saponins(1–3)and the known sesquiterpenoid cinnamosmolide(4).The structures of 1–3 were elucidated by extensive 1D and 2D NMR experiments and mass spectrometry.Compounds 1,2,and 4 showed moderate cytotoxicity against the A2780 human ovarian cancer cell line with IC50 values of 2.8,10.2 and 2.0 lM,respectively.Qingxi Su Peggy J.Brodie Yixi Liu James S.Miller Naina M.Andrianjafy Rabodo Antsiferana Vincent E.Rasamison David G.I.Kingston 2016Natural Products and Bioprospecting2016,6,1:0
20Immobilization and characterization of the Lactarius deliciosus mycelia-embedded polylysine-alginate beads and their decolorization performance显示文摘Liquid fermented fungal mycelia with decolorization capability have potential applications in scale-up. In this work, the Lactarius deliciosus mycelia were immobilized on ε-polylysine-alginate beads, and the decolorization effects of ε-polylysine-alginate beads were demonstrated along with Coomassie brilliant blue G-250 as a model dye. Morphology observation confirmed the beads had an exterior film and interior capsule with honeycomb microstructures suitable for mycelia growth. It was manifested that the maximum decolorization efficiency for mycelia was 98.5% at a removal rate of 0.68 mg·L^(-1)·h after 3 days. In comparison, the decolorization efficiency of the immobilized mycelia reached the maximum value of 97.3% at a removal rate of 6.1 mg·L^(-1)·h after 8 h. The enzyme activities of lignin peroxidase and laccase tested in the immobilized mycelia were significantly higher than in that of the free ones, such as the lignin peroxidase had the highest enzyme activity of 77.6 ± 7.4 U·L^(-1) in the former, while of 27.4 ± 8.7 U·L^(-1) in the latter. The immobilization of L. deliciosus mycelia could improve the decolorization of Coomassie brilliant blue G-250 efficiently. The prepared ε-polylysine-alginate beads embedded with L. deliciosus mycelia have very good reusability and a great potential in decolorizing analog dyes.Yiwen Jin Jie Yuan Caixia Liu Jiacheng Sun Youbin Liu Zhifeng Ding Qingxi Wu 2023Frontiers of Chemical Science and Engineering2023,17,12:0
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