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50篇 您的检索式:作者名="Lichun LIU"
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1Effect of subsoil tillage depth on nutrient accumulation, root distribution, and grain yield in spring maize显示文摘A four-year field experiment was conducted to investigate the effect of subsoiling depth on root morphology, nitrogen(N), phosphorus(P), and potassium(K) uptake, and grain yield of spring maize. The results indicated that subsoil tillage promoted root development,increased nutrient accumulation, and increased yield. Compared with conventional soil management(CK), root length, root surface area, and root dry weight at 0–80 cm soil depth under subsoil tillage to 30 cm(T1) and subsoil tillage to 50 cm(T2) were significantly increased, especially the proportions of roots in deeper soil. Root length, surface area, and dry weight differed significantly among three treatments in the order of T2 > T1 > CK at the12-leaf and early filling stages. The range of variation of root diameter in different soil layers in T2 treatment was the smallest, suggesting that roots were more likely to grow downwards with deeper subsoil tillage in soil. The accumulation of N, P, and K in subsoil tillage treatment was significantly increased, but the proportions of kernel and straw were different. In a comparison of T1 with T2, the grain accumulated more N and P, while K accumulation in kernel and straw varied in different years. Grain yield and biomass were increased by 12.8% and 14.6% on average in subsoil tillage treatments compared to conventional soil treatment. Although no significant differences between different subsoil tillage depths were observed for nutrient accumulation and grain yield, lodging resistance of plants was significantly improved in subsoil tillage to 50 cm, a characteristic that favors a high and stable yield under extreme environments.Hongguang Cai Wei Ma Xiuzhi Zhang Jieqing Ping Xiaogong Yan Jianzhao Liu Jingchao Yuan Lichun Wang Jun Ren 2014The Crop Journal2014,2,5:42
2High precision landing site mapping and rover localization for Chang'e-3 mission显示文摘This paper presents the comprehensive results of landing site topographic mapping and rover localization in Chang’e-3 mission.High-precision topographic products of the landing site with extremely high resolutions(up to 0.05 m)were generated from descent images and registered to CE-2 DOM.Local DEM and DOM with 0.02 m resolution were produced routinely at each waypoint along the rover traverse.The lander location was determined to be(19.51256°W,44.11884°N,-2615.451 m)using a method of DOM matching.In order to reduce error accumulation caused by wheel slippage and IMU drift in dead reckoning,cross-site visual localization and DOM matching localization methods were developed to localize the rover at waypoints;the overall traveled distance from the lander is 114.8 m from cross-site visual localization and 111.2 m from DOM matching localization.The latter is of highest accuracy and has been verified using a LRO NAC image where the rover trajeactory is directly identifiable.During CE-3 mission operations,landing site mapping and rover localization products including DEMs and DOMs,traverse maps,vertical traverse profiles were generated timely to support teleoperation tasks such as obstacle avoidance and rover path planning.LIU ZhaoQin DI KaiChang PENG Man WAN WenHui LIU Bin LI LiChun YU TianYi WANG BaoFeng ZHOU JianLiang CHEN HongMin 2015Science China(Physics,Mechanics & Astronomy)2015,58,1:15
3The maximum coseismic vertical surface displacement and surface deformation pattern accompanying the Ms 8.0 Wenchuan earthquake显示文摘The amount of coseismic deformation and its distribution of the Wenchuan earthquake provide important scientific bases for revealing the mechanisms of earthquake preparation and characterizing the rupture propagation of the Wenchuan earthquake. The previous studies have indicated that the earthquake ruptured the middle-to-north segment of the Longmenshan central fault and the middle segment of the Longmenshan range-front fault, which are characterized by two surface rupture zones of 240 km and 90 km in length, respectively. Based on the pre-earthquake information and photos of landforms and buildings obtained through ge-ologic and geomorphic survey of the area around Shaba Village of Beichuan County, Sichuan Province and the extensive interview with local villagers, we measured the displacements of the major terrain features and the dislocated buildings by total station instruments and differential GPS and obtained the maximum vertical displacement of 9±0.5 m and right-lateral displacement of 2±0.5 m around the Zou’s house in Shaba Village. Though the near-surface deformation exhibits a normal faulting around Shaba Village, the dynamic environment has not changed on the whole. The NW wall of the fault uplifted but without gravity gliding as normally occurring on the hanging wall of a normal fault, which proves that the 9±0.5 m displacement should be the maximum coseismic vertical displacement of the May 12, 2008 Ms 8.0 Wenchuan earthquake.Ran YongKang Shi Xiang Wang Hu Chen LiChun Chen Jie Liu RuiChun Gong Huiling 2010Chinese Science Bulletin2010,55,9:9
4Contemplation on China’s Energy-Development Strategies and Initiatives in the Context of Its Carbon Neutrality Goal显示文摘1.Introduction Climate change has become a global nontraditional security challenge,and achieving carbon neutrality is the global trend of the era that will determine the future of humanity[1-5].So far,more than 137 countries have set goals or pledged to achieve carbon neutrality.In September 2020,China committed itself to peak carbon emissions by 2030 and to achieve carbon neutrality by 2060,in what are known as China’s“dual carbon goals”[6].Houliang Dai Yinao Su Lichun Kuang Jizhen Liu Dazhao Gu Caineng Zou 2021Engineering2021,7,12:6
5A microRNA encoded by HSV-1 inhibits a cellular transcriptional repressor of viral immediate early and early genes显示文摘Viral microRNAs are one component of the RNA interference phenomenon generated during viral infection. They were first identified in the Herpesviridae family, where they were found to regulate viral mRNA translation. In addition, prior work has suggested that Kaposi's sarcoma-associated herpesvirus (KSHV) is capable of regulating cellular gene transcription by miRNA. We demonstrate that a miRNA, hsv1-mir-H27, encoded within the genome of herpes simplex virus 1 (HSV-1), targets the mRNA of the cellular transcriptional repressor Kelch-like 24 (KLHL24) that inhibits transcriptional efficiency of viral immediate-early and early genes. The viral miRNA is able to block the expression of KLHL24 in cells infected by HSV-1. Our discovery reveals an effective viral strategy for evading host cell defenses and supporting the efficient replication and proliferation of HSV-1.WU WenJuan GUO ZhongPing ZHANG XueMei GUO Lei LIU LongDing LIAO Yun WANG JingJing WANG LiChun LI QiHan 2013Science China(Life Sciences)2013,56,4:6
6A comparative study of the characteristics of two Coxsackie A virus type 16 strains (genotype B)显示文摘Coxsackie A virus is one of the major pathogens associated with hand, foot and mouth disease (HFMD). The etiological characteristics of Coxsackie A virus type 16 (CA16) are thought to correlate with the pathological process of its infection. Two CA16 strains that were isolated from a severe HFMD patient presented with different plaque forms. This observation, along with biological analysis, indicated that the differences in the strains' biological characteristics, such as proliferation kinetics and immunogenicity, correlate with differences in their pathogenicity toward neonatal mice. Furthermore, these differences are thought to be associated with the sequence of the 5′ non-coding region of the viral genome and the VP1 structural region sequence. The results suggest that the biological and genetic characteristics of the CA16 viral strains are relevant to their pathogenicity.YANG ErXia ZHAO Heng ZHANG Ying LIU JianSheng LIAO Yun WANG LiChun CUI PingFang YANG LiXian LIU LongDing DONG ChengHong DONG ShaoZhong SHAO CongWen JIANG Li SUN Le LI QiHan 2012Science China(Life Sciences)2012,55,4:5
7Transcriptional regulation of the Herpes Simplex Virus 1α-gene by the viral immediate-early protein ICP22 in association with VP16显示文摘Herpes Simplex Virus 1 (HSV1) is capable of inducing two forms of infection in individuals, and the establishment of which type of infection occurs is linked to the transcriptional activation of viral α genes. One of the HSV1 α genes, ICP22, is known to have multiple functions during virus replication, but its distinct roles are still unclear. This study showed that ICP22 functions as a general repressor for certain viral and cellular promoters, and this transcriptional repression by ICP22 is independent of the specific upstream promoter element, as shown using the CAT enzyme assay system. Further work also found that VP16 interfered with ICP22 mediated transcriptional repression of the viral α4 gene, through interactions with specific elements upstream of the α4 gene promoter. These findings support the possibility that ICP22 and VP16 control transcription of HSV1α genes in a common pathway for the establishment of either viral lytic or latent infections.CUN Wei, GUO Lei, ZHANG Ying, LIU LongDing, WANG LiChun, LI JianFeng, DONG ChengHong, WANG JinJin & LI QiHan Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China 2009Science China(Life Sciences)2009,52,4:4
8Starch biosynthesis in cereal endosperms: An updated review over the last decade显示文摘Starch is a vital energy source for living organisms and is a key raw material and additive in the food and non-food industries.Starch has received continuous attention in multiple research fields.The endosperm of cereals(e.g.,rice,corn,wheat,and barley)is the most important site for the synthesis of storage starch.Around 2010,several excellent reviews summarized key progress in various fields of starch research,serving as important references for subsequent research.In the past 10 years,many achievements have been made in the study of starch synthesis and regulation in cereals.The present review provides an update on research progress in starch synthesis of cereal endosperms over the past decade,focusing on new enzymes and non-enzymatic proteins involved in starch synthesis,regulatory networks of starch synthesis,and the use of elite alleles of starch synthesis-related genes in cereal breeding programs.We also provide perspectives on future research directions that will further our understanding of cereal starch biosynthesis and regulation to support the rational design of ideal quality grain.Lichun Huang Hongyan Tan Changquan Zhang Qianfeng Li Qiaoquan Liu 2021Plant Communications2021,2,5:4
9HSV-1 stimulation-related protein HSRG1 inhibits viral gene transcriptional elongation by interacting with Cyclin T2显示文摘The protein encoded by HSRG1(HSV-1 stimulation-related gene 1) is a virally induced protein expressed in HSV-1-infected cells.We have already reported that HSRG1 is capable of interacting with transcriptional regulator proteins.To further analyze the effects of HSRG1 on the regulation of viral gene transcription,we expressed the HSRG1 protein in transfected cells and found that it postpones the proliferation of HSV-1.CAT(chloramphenicol acetyltransferase) assays also revealed that HSRG1 reduces transcription from HSV-1 promoters.Yeast two-hybrid and immunoprecipitation assays indicated that HSRG1 interacts with Cyclin T2,the regulatory subunit of P-TEFb,which is required for transcription elongation by RNA Pol II(RNAP II) ,and that amino acid residues 1-420 in Cyclin T2 are important for binding with HSRG1.Fluorescence assays suggested that the cellular localizations of those two proteins are influenced by their interaction.Further analyses with CAT assays revealed that HSRG1 inhibits the transcriptional activation by Cyclin T2 of viral promoters.Our results suggested that the inhibitory effects of HSRG1 on viral replication and proliferation are probably induced by its binding to Cyclin T2.Therefore,it is likely that HSRG1 inhibits viral gene transcriptional elongation by interacting with Cyclin T2.WU WenJuan YU Xian LI WeiZhong GUO Lei LIU LongDing WANG LiChun LI QiHan 2011Science China(Life Sciences)2011,54,4:3
10Fluorine-substituted O3-type NaNi_(0.4)Mn_(0.25)Ti_(0.3)Co_(0.05)O_(2-x)F_(x) cathode with improved rate capability and cyclic stability for sodium-ion storage at high voltage显示文摘O3-type Na NiO_(2)-based cathode materials undergo irreversible phase transition and serious capacity decay at high voltage above 4.0 V in sodium-ion batteries. To address these challenges, effects of Fsubstitution on the structure and electrochemical performance of Na Ni_(0.4)Mn_(0.25)Ti_(0.3)Co_(0.05)O_(2) are investigated in this article. The F-substitution leads to expanding of interlayer, which can enhance the mobility of Na+. NaNi_(0.4)Mn_(0.25)Ti_(0.3)Co_(0.05)O_(1.92)F_(0.08)(NMTC-F_(0.08)) with the optimal F-substitution degree exhibits much improved rate capability and cyclic stability. It delivers reversible capacities of 177 and 97 m Ah g^(-1) at 0.05 and 5 C within 2.0–4.4 V, respectively. Galvanostatic intermittent titration technique verifies faster kinetics of Na+diffusion in NMTC-F_(0.08). And in-situ XRD investigation reveals the phase evolution of NMTC-F_(0.08), indicating enhanced structural stability results from F-substitution. This study may shed light on the development of high performance cathode materials for sodium-ion storage at high voltage.Chaojin Zhou Lichun Yang Chaogang Zhou Jiangwen Liu Renzong Hu Jun Liu Min Zhu 2021Journal of Energy Chemistry2021,30,9:3
11Tracing of dye molecules in living plants through NaGdF_4:Yb^(3+),Er^(3+)fluorescent nanoprobes显示文摘In this paper, we demonstrated trace of dye molecules in living plants. The NaGdF4:Yb^(3+),Er^(3+) nanoparticles probe was used to detect the rhodamine B(RhB) in bean sprout. It is found that the fluorescencedye can be efficiently imbibed during the growing process and the absorbance presented a position dependence effect, which was supported by the upconversion spectra and the fluorescent image characterization. In addition, the concentration of the residual RhB in bean sprout can be efficiently traced by the synthesized probe based on the fluorescent resonant energy transfer. Finally, the relation between the excitation power, concentration and the ratio of yellow to green emission are discussed in detail. These results can be helpful in understanding the RhB dye molecules absorbance process in vegetable growth and provide an efficient way to trace the residual dyes in vivo plant.Xiaofeng Wu Ya'nan Zhang Shiping Zhan Jin Li Guozheng Nie Shigang Hu Cong Yan Shaobing Wu Shengbin Cheng Junshan Hu Lichun Shi Yunxin Liu 2019Journal of Rare Earths2019,37,3:3
12Landing site topographic mapping and rover localization for Chang’e-4 mission显示文摘This paper presents the techniques and results of landing-site topographic mapping and rover localization using orbital,descent and rover images in the Chang’e-4 mission.High-resolution maps of the landing site are generated from orbital and descent images.Local digital elevation models and digital orthophoto maps with 0.02 m resolution are generated at each waypoint.The location of the lander is determined as(177.588?E,45.457?S)using festure-matching techniques.The cross-site visual localization method is routinely used to localize the rover at each waypoint to reduce error accumulation from wheel slippage and IMU drift in dead reckoning.After the first five lunar days,the rover travels 186.66 m from the lander,according to the cross-site visual localization.The developed methods and results have been directly utilized to support the mission’s operations.The maps and localization information are also valuable for supporting multiple scientific explorations of the landing site.Zhaoqin LIU Kaichang DI Jian LI Jianfeng XIE Xiaofeng CUI Luhua XI Wenhui WAN Man PENG Bin LIU Yexin WANG Sheng GOU Zongyu YUE Tianyi YU Lichun LI Jia WANG Chuankai LIU Xin XIN Mengna JIA Zheng BO Jia LIU Runzhi WANG Shengli NIU Kuan ZHANG Yi YOU Bing LIU Jiangang LIU 2020Science China(Information Sciences)2020,63,4:3
13Analysis of HSV-I ICP22 effects on HCMV major immediate-early promoter structure显示文摘The human cytomegalovirus (HCMV) major immediate-early (MIE) promoter has strong transcriptional promoting capability. Its cis-acting regulatory elements form a special structure in this region that is repeated multiple times; the biological significance of these elements and their different compositions in the transcriptional promoting process remain unclear. Our results demonstrate that the HSV-I MIE protein ICP22 can generate strong repression of many viral and cellular promoters and enhancers. We further studied the transcriptional effects of ICP22 on structural elements and mutations in various HCMV MIE promoters by using a CAT assay. In spite of different transcriptional effects of all the ele- ments in the presence of ICP22, the transcriptional efficiencies exhibited by mutations generated by different compositions and an entire HCMV promoter, are not the simple sum of the functions of these elements. Furthermore, the transcriptional activities of specific sequences were not affected by the presence of ICP22. Therefore, it is assumed that the HCMV MIE promoter co-regulates expression of downstream genes by using viral and cellular specific factors via a specific pathway.LUO Jie, CUN Wei, CHE YanChun, WANG LiChun, LI WeiZhong, LIU LongDing & LI QiHan Institute of Medical Biology, Chinese Academy of Medical Sciences and Peking Union Medical College, Kunming 650118, China 2007Science China(Life Sciences)2007,50,3:2
14Immediate-early gene product ICP22 inhibits the trans-transcription activating function of P53-mdm-2显示文摘As a product of HSVI immediate-early gene, ICP22 is capable of interacting with various cellular tran-scriptive and regulatory molecules during viral infection so as to impact the normal cellular molecular mechanism. ICP22 expressed in transfected cells can push the cells’ entering into S phase with binding to mdm-1 promoter region and impact its trans-transcription activating effect by P53. Consequently, the MDM-2 binds to P53, and the degradation effects by the ubiquitous pathway are decreased, improving indirectly the P53 levels in cells and making the cells progress into the S phase.GUO HongXiong, CUN Wei, LIU LongDing, WANG LiChun, ZHAO HongLing, DONG ChengHong & LI QiHan Department of Viral Immunology, Institute of Medical Biology, CAMS and PUMC, Kunming 650118, China These authors contributed equally to this work 2007Science China(Life Sciences)2007,50,4:2
15Sensitive and se- lective nonenzymatie glucose detection using functional NiO- Pt hybrid nanofibers显示文摘Ding Yu Liu Yixin Zhang Lichun 2011Eleetroehim Acta2011,58,:1
16Risk factors associ- ated with unplanned endotracheal self-extubation of hospitalized intubated patients: a 3-year retrospective case-control study 显示文摘Chang Lichun Liu Peifen Huang Yulu 2011ApplNursRes2011,24,3:1
17Interfacially reinforced methylphenylsilicone resin composites by chemically grafting multiwall carbon nanotubes onto carbon fibers显示文摘Guangshun Wu Lichun Ma Li Liu 2015Composites Part B2015,82,:1
18Tailoring biochar by PHP towards the oxygenated functional groups(OFGs)-rich surface to improve adsorption performance显示文摘In this work,a modification method of H_(3)PO_(4)plus H_(2)O_(2)(PHP)was introduced to targetedly form abundant oxygenated functional groups(OFGs)on biochar,and methylene blue(MB)was employed as a model pollutant for adsorption to reflect the modification performance.Results indicated that parent biochars,especially derived from lower temperatures,substantially underwent oxidative modification by PHP,and OFGs were targetedly produced.Correspondingly,approximately 21.5-fold MB adsorption capacity was achieved by PHP-modified biochar comparing with its parent biochar.To evaluate the compatibility of PHP-modification,coefficient of variation(CV)based on MB adsorption capacity by the biochar from various precursors was calculated,in which the CV of PHP-modified biochars was 0.0038 comparing to0.64 of the corresponding parent biochars.These results suggested that the PHP method displayed the excellent feedstock compatibility on biochar modification.The maximum MB adsorption capacity was454.1 mg/g when the H_(3)PO_(4)and H_(2)O_(2)fraction in PHP were 65.2%and 7.0%;the modification was further intensified by promoting temperature and duration.Besides,average 94.5%H_(3)PO_(4)was recovered after 10-batch modification,implying 1.0 kg H_(3)PO_(4)(85%)in PHP can maximally modify 2.37 kg biochar.Overall,this work offered a novel method to tailor biochar towards OFGs-rich surface for efficient adsorption.Xinyue Xiong Zhanglin Liu Li Zhao Mei Huang Lichun Dai Dong Tian Jianmei Zou Yongmei Zeng Jinguang Hu Fei Shen 2022Chinese Chemical Letters2022,33,6:1
19Body Size but Not Food Size Determined Head Sexual Dimorphism in Rana kukunoris from the Tibetan Plateau显示文摘Sexual dimorphism between males and females is a common pattern observed in the natural world and has become one of the main focuses of evolutionary biology.Amphibian head size and shape are important factors that may influence food acquisition,but knowledge about the sexual differences between amphibian head size and shape is relatively scant.Here,intersexual differences in the head size and shape of Rana kukunoris,which is a high-elevation frog from the Qinghai-Tibet Plateau,were investigated.Significant differences were found in the head shape but not the head size between sexes.A significant correlation was also observed between prey size and head size.However,these correlations disappeared when individual body size was controlled,suggesting that body size but not food size was the main factor resulting in intersexual differences in head size/shape.The results suggested that food competition between sexes did not result in sexual dimorphism of head shape among these frogs.Hongzhou CHEN Haifen QIN Zhenkun ZHAO Jiahong LIAO Yanfang WU Xueyan LIU Lichun JIANG Buddhi DAYANANDA Wei CHEN 2023Asian Herpetological Research2023,14,2:1
20Assessment of contrast-enhanced ultrasonography in diagnosis and preoperative localization of insulinoma显示文摘Lichun An Wenxiu Li Ke-chun Yao Rong Liu Faqin Lv Jie Tang Sunxin Zhang 2010European Journal of Radiology2010,,3:1
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