维普中文期刊产品整合服务
429篇 您的检索式:作者名="Yiqun"
    题名 作者 年代 出处 被引量
1Primary dolostone formation related to mantle-originated exhalative hydrothermal activities,Permian Yuejingou section,Santanghu area, Xinjiang,NW China显示文摘The Permian Lucaogou Formation is an important hydrocarbon source rock in the Junggar, Turpan, and Santanghu basins in Xinjiang, NW China. For the first time, dolostones associated with mantle-originated exhalative hydrothermal fluid flows are discovered in Yuejingou section in the Santanghu Basin area. They include dolomicrite, doloarenite, and a small amount of dolorudite, and are finely (0.05-0.15 cm thick) interlaminated with lime micrite and dolomicritic analcime laminites. Alkali feldspar and analcime grains are common in doloarenite and are interpreted as having been derived from analcime phonolites and peralkaline magmatic rocks. These magmatic fragments were brought up from subsurface by hydrothermal fluid flow and had experienced exhalative brecciation, transport, and deposition on the lake floor. The matrix consists dominantly of dolomite and ankerite smaller than 0.01 mm. The dolostones can be subdivided into four types on the basis of mineral composition and content. The detrital analcime and alkaline feldspar grains and tuff lithics are interpreted as intraclasts, which were deposited in an under-filled starved lake basin. The δ18OPDB values of dolostones are -5‰ to -21.1‰, and -11.9‰ on average; the 87Sr/86Sr ratios of dolostones are 0.70457 to 0.706194, and 0.705005 on average. These values, in combination with evidence of multi-episodes of peralkaline extrusion, suggest a mantle origin of the hydrothermal fluids, which may have promoted primary dolomite formation. The fluid from the upper mantle caused serpentinization of ultramafic rocks that intruded into the lower crust to obtain Mg2+ and Fe2+, and injected the ions into the lake water as the Mg and Fe sources for dolomite and ankerite. Hydro- thermal fluids associated with peralkaline magmatic rocks also provided Ca2+, Mg2+, Fe2+, and CO32-. Explosive breccias formed and dolostones were convoluted near the vent of hydrothermal fluid exhalation, whereas laminated dolostones formed farther away from the vent. The dolostones are primary dolomite deposition in an intracontinental rift basin and associated with mantle-originated hydrothermal fluids. They provide an insight into the origin of dolomite formation in the geologic history and clues to understand the sedimentary environments and tectonic conditions in northern Xinjiang during the late Paleozoic.LIU YiQun JIAO Xin LI Hong YUAN MingSheng YANG Wan ZHOU XiaoHu LIANG Hao ZHOU DingWu ZHENG ChaoYang SUN Qin WANG ShuangShuang 2012Science China Earth Sciences2012,55,2:17
2OsVPS9A Functions Cooperatively with OsRAB5A to Regulate Post-Golgi Dense Vesicle-Mediated Storage Protein Trafficking to the Protein Storage Vacuole in Rice Endosperm Cells显示文摘在米饭内乳房间, glutelins 作为 proglutelins 在不平的 endoplasmic 蜂窝胃上被综合并且被排序到称为蛋白质身体 II (PBII ) 的 theprotein 存储液泡(PSV ) ,在他们被变换成成熟形式的地方。稠密的泡(DV ) 调停了在大米种子的 proglutelins 的 trafficking 被建议了,但是这个过程的 post-Golgi 控制是 largelyunknown。DV 是否能与 PSV 直接熔化,是争论的另一件事。在这研究,我们建议规章的 mechanismunderlying 调停 DV, post-Golgi proglutelin trafficking 到 PBII (PSV ) 。gpa2, OsVPS9A 的 loss-of-function 异种,编码 OsRAB5A 的 GEF,积累了 uncleaved proglutelins。Proglutelins 对到沿着在 DV 形式的房间墙的 apoplast 的 paramural bodiesand 指向 mis,它在 PBII 尺寸导致了伴随物减小。Previouslyreported gpa1,在 OsRab5a 变异,有类似的显型,当时两倍异种加重了的 gpa1gpa2 条件。另外, OsVPS9A 在 vitro 并且在 vivo 与 OsRAB5A 交往了。我们断定 OsVPS9A 和 OsRAB5A 可以一起工作并且在调停 DV 的 post-Golgi proglutelintrafficking 起一个规章的作用到 PBII (PSV ) 。DV 可能直接熔化到 PBII (PSV ) 交付货物的证据也是 presented.Key 词:Feng Liu Yulong Ren Yihua Wang Cheng Peng Kunneng Zhou Jia Lv Xiuping Guo Xin Zhang Jianmin wan Yiqun Bao 2013Molecular Plant2013,6,6:16
3Prototype for 5G New Air Interface Technology SCMA and Performance Evaluation显示文摘Sparse code multiple access(SCMA) is a novel non-orthogonal multiple access scheme proposed to meet the challenging demand of the future 5G communications, especially in support of the massive connections. The coded bits from each data stream will be directly mapped as multi-dimensional SCMA codeword in complex domain and then spread onto the physical resource elements in a sparse manner. The number of codewords that can be nonorthogonally multiplexed in one SCMA block can be made much larger than the number of orthogonal resource elements therein, resulting in an overloaded system. The sparsity in the spreading pattern and the design in the multidimensional modulator jointly ensure the SCMA codewords can be robustly decoded with low complexity. In this paper, we focus on the low complexity receiver design and verified the superior of an SCMA system via simulations and real-time prototyping. Lab tests and field tests all show that SCMA is a promising candidate for 5G non-orthogonal multiple access which can provide up to 300% overloading that triples the whole system throughput while still enjoying the link performance close to orthogonal transmissions.LU Lei CHEN Yan GUO Wenting YANG Huilian WU Yiqun XING Shuangshuang 2015China Communications2015,12,S1:15
4Application of Smith Predictor Based on Single Neural Network in Cold Rolling Shape Control显示文摘Flatness is one of the most important criterion factors to evaluate the quality of the steel strip. To improve the strip’s flatness quality, the most frequently used methodology is to employ the closed-loop automatic shape control system. However, in the shape control system, the shape-meter is always installed at the down way of the exit of the cold rolling mill and can not sense the changes of the strip flatness in the rolling gap directly. This kind of installation results in the delay of the feedback in the control system. Therefore, the stability and response performance of the system are strongly affected by the delay. At present, there is still no mature way to design controllers for systems with time delay. Although the conventional PID controller used in most practical applications has the capability to compensate the delay, the effect of the compensation is limited, especially for the systems with long time delay. Smith predictor, as a compensator for solving this problem, is now widely used in industry systems. However, the request of highly precise model of the system and the poor adaptive performance to the changes of related parameters limit the application of the Smith predictor in practice. In order to overcome the drawbacks of the Smith predictor, a new Smith predictor based on single neural network PID (SNN-PID) is proposed. Because the single neural network is employed into the Smith predictor to improve the controller’s self-adaptability, the adaptive capability to the varying parameters of the system is improved. Meanwhile, for the purpose of solving the problems such as time-consuming and complicated calculation of the neural networks in real time, the learning coefficient of neural network is divided into several stages as usually done in expert control system. Therefore, the control system can obtain fast response due to the improved calculation speed of the neural networks. In order to validate the performance of the proposed controller, the experiment is conducted on the shape control system in a 300 mm four-high reversing cold rolling mill. The experimental results show that the SNN-PID with Smith predictor controller can effectively compensate the delay effects and achieve better control performance than the conventional PID controller.WANG Yiqun SUN FD LIU Jian SUN Menghui XIE Yihan 2009Chinese Journal of Mechanical Engineering2009,22,2:14
5Research on power electronic transformer applied in AC/DC hybrid distribution networks显示文摘The AC/DC hybrid distribution network is one of the trends in distribution network development, which poses great challenges to the traditional distribution transformer. In this paper, a new topology suitable for AC/DC hybrid distribution network is put forward according to the demands of power grid, with advantages of accepting DG and DC loads, while clearing DC fault by blocking the clamping double sub-module(CDSM) of input stage. Then, this paper shows the typical structure of AC/DC distribution network that is hand in hand. Based on the new topology, this paper designs the control and modulation strategies of each stage, where the outer loop controller of input stage is emphasized for its twocontrol mode. At last, the rationality of new topology and the validity of control strategies are verified by the steady and dynamic state simulation. At the same time, the simulation results highlight the role of PET in energy regulation.Yiqun Miao Jieying Song Haijun Liu Zhengang Lu Shufan Chen Chun Ding Tianzhi Cao Linhai Cai Yuzhong Gong 2018Global Energy Interconnection2018,1,3:14
6黄瓜黑色果刺基因染色体定位及候选基因分析显示文摘【目的】黄瓜作为重要的果菜类蔬菜,果实品质一直是黄瓜育种研究的重点。果实品质包括内在品质和外观品质,其中外观品质对黄瓜的商品性具有重要影响。果刺颜色作为黄瓜重要的品质性状之一,对其进行遗传分析和基因定位将有助于了解果刺颜色遗传的分子机理,为黄瓜果实性状改良提供理论依据和技术支撑,同时也可为刺色基因的精细定位及克隆奠定基础。【方法】研究利用黄瓜白色果刺自交系GY14(P1)和黑色果刺自交系NC76(P2)为亲本构建遗传群体,进行黄瓜果刺颜色的遗传分析。以F2分离群体为试材,应用分离群体分组分析法(BSA)和2 112对SSR引物进行SSR分析,结合9 930黄瓜全基因组序列信息和100份核心种质重测序结果开发新标记,对初定位区域进行标记加密。采用JoinMap 4.0作图软件和MapInspect软件构建连锁群并完成连锁群与染色体的对应,实现黄瓜黑色果刺性状的基因定位。运用生物信息学,在定位区域进行候选基因分析。利用包含156个株系的重组自交系(RILs)群体,对黑色果刺基因紧密连锁的两侧翼分子标记进行验证,确定标记用于分子标记辅助选择(MAS)育种的准确性。【结果】研究表明,黄瓜自交系NC76的黑色果刺符合质量性状遗传特点,由显性单基因B控制,黑色对白色为显性。初步定位筛选获得了与B基因连锁的8对SSR引物,将B定位于黄瓜4号染色体(Chr.4)上,最近的连锁标记为SSR22231,遗传距离为10.8 cM;根据初定位区域的序列信息,设计合成了新的SSR引物212对和Indel引物25对,利用这些引物对双亲和F2群体DNA进行分析,最终构建了一个包含14个SSR标记和1个InDel标记的分子标记连锁群,获得与B连锁的两侧翼标记SSRB-181和SSRB-130,遗传距离分别为2.0 cM和1.6 cM,该区段物理距离为422.1 kb,有60个预测候选基因,推测Csa4G003095和Csa4G001690是与黑色果刺形成相关性较大的候选基因。与B紧密连锁的两侧翼标记用于MAS育种的准确率分别为96.8%和96.2%,其中SSRB-181对黑色果刺植株鉴定的准确率达到100%,将在MAS育种发挥重要作用。【结论】黄瓜自交系NC76的黑色果刺性状由显性单基因控制,该基因位于Chr.4上422.1 kb范围内,两侧翼标记为SSRB-181和SSRB-130,遗传距离为3.6 cM。本研究结果为黑色果刺基因的精细定位和克隆及MAS育种奠定了良好基础。刘书林 顾兴芳 苗晗 王烨 Yiqun Weng Todd C Wehner 张圣平 2014中国农业科学2014,47,1:11
7Spatiotemporal Dynamics of the BRI1 Receptor and its Regulation by Membrane Microdomains in Living Arabidopsis Cells显示文摘Arabidopsis BRASSINOSTEROID INSENSITIVE1 (BRI1 ) 的主要 brassinosteroid (BR ) 受体在 BR 发信号,而是在 BRI1 成为主观和集会状态遗体上位于 BR 的效果下面的分子的机制起基本作用不清楚。这里,我们使用了可变角度总数内部思考荧光显微镜学和荧光分析动力学的跨关联的光谱学标注 ofGFP 的 BRI1。我们发现了那,响应 BR,有 AtFlot1-mCherry 的 BRI1-GFP 的合作本地化的度增加了,并且特别 BR 刺激了膜 BRI1 成为主观的联系 microdomain 的小径。我们也在 endocytosis 有缺点的 chc2-1 异种和 AtFlot1 amiRNA 15-5 线验证了这些观察。而且, bri1-EMS-suppressor 的 phosphorylation 地位的检查 BR 应答的基因表示的第 1a 测量表明膜 microdomains 影响 BR 发信号。这些结果 suggestthat BR 支持划分 BRI1 成功能的膜 microdomains 激活 BR 发信号。Li Wang Hong Li Xueqin Lv Tong Chen Ruili Li Yiqun xuei Jianjun Jiang Biao Jin Frantisek Baluska Jozef Samaj Xuelu Wang Jinxing Lin 2015Molecular Plant2015,8,9:11
8Comprehensive analysis of NAC transcription factors and their expression during fruit spine development in cucumber (Cucumis sativus L.)显示文摘The cucumber(Cucumis sativus L.)is an important vegetable crop worldwide,and fruit trichomes or spines are an important trait for external fruit quality.The mechanisms underlying spine formation are not well understood,but the plant-specific NAC family of transcription factors may play important roles in fruit spine initiation and development.In this study,we conducted a genome-wide survey and identified 91 NAC gene homologs in the cucumber genome.Clustering analysis classified these genes into six subfamilies;each contained a varying number of NAC family members with a similar intron–exon structure and conserved motifs.Quantitative real-time PCR analysis revealed tissue-specific expression patterns of these genes,including 10 and 12 that exhibited preferential expression in the stem and fruit,respectively.Thirteen of the 91 NAC genes showed higher expression in the wild-type plant than in its near-isogenic trichome mutant,suggesting their important roles in fruit spine development.Exogenous application of four plant hormones promoted spine formation and increased spine density on the cucumber fruits;several NAC genes showed differential expression over time in response to phytohormone treatments on cucumber fruit,implying their essential roles in fruit-trichome development.Among the NAC genes identified,12 were found to be targets of 13 known cucumber micro-RNAs.Collectively,these findings provide a useful resource for further analysis of the interactions between NAC genes and genes underlying trichome organogenesis and development during fruit spine development in cucumber.Xingwang Liu Ting wang Ezra Bartholomew Kezia Black Mingming Dong Yaqi Zhang Sen Yang Yanling Cai Shudan Xue Yiqun Weng Huazhong Ren 2018Horticulture Research2018,5,1:10
9A quantification model of Traditional Chinese Medicine syndromes in children with idiopathic precocious puberty and early puberty显示文摘OBJECTIVE:To establish a quantification model of Traditional Chinese Medicine(TCM)syndromes by sampling patients undergoing idiopathic precocious puberty(IPP)and early puberty.METHODS:A questionnaire for classifying and quantifying TCM syndromes was designed and administered.All the results were analyzed;the relationship between 3 types of syndrome and 47symptoms were summated.Meanwhile,the frequency distribution of each symptom or sign was aggregated.Fuzzy mathematics was used to develop a quantification model ofTCM syndromes.RESULTS:We found that precocious puberty had 3types of syndrome,including hyperactivity of fire due to Yin deficiency(Syndrome I),depressed liver Qi transforming into fire(Syndrome II),and end retention of damp heat(Syndrome III).In the IPP group,Syndrome I was the most common principal syndrome(100%).Forty-six patients(43.81%)werediagnosed with Syndrome I accompanied by Syndrome II and 11(10.48%)were diagnosed with Syndrome I accompanied by Syndrome III.In the early puberty group,Syndrome I was also the main syndrome(98.39%).The degrees of most symptoms were mild to moderate.Reddened tongue was the most common tongue manifestation(62.86%prevalence)in the IPP group.The most common pulse manifestations were slippery pulse,thread pulse,and taut pulse.The Asymptotic Normalization Coefficient(ANC)method was used to quantify the TCM syndromes in 167 cases.Diagnostic accuracy rate reached 91%,comparable to expert diagnosis.CONCLUSION:We find that there are 3 types of syndrome in the IPP group and in the early puberty group.Syndrome I(hyperactivity of fire due to Yin deficiency)is the main syndrome in the two groups.ANC may be an appropriate for quantification model ofTCM syndromes.Yanyan Lin Yuanyuan Xue Jian Yu Yonghong Wang Wen Sun Yanyan Sun Yumin Shi Yiqun Zhang Hong Hu 2013Journal of Traditional Chinese Medicine2013,33,5:9
10Finite p-Groups all of Whose Subgroups of Index p^(3) are Abelian显示文摘Suppose that G is a finite p-group.If all subgroups of index p^(t)of G are abelian and at least one subgroup of index p^(t−1)of G is not abelian,then G is called an A_(t)-group.We useA0-group to denote an abelian group.From the definition,we know every finite non-abelian p-group can be regarded as an A_(t)-group for some positive integer t.A_(1)-groups and A_(2)-groups have been classified.Classifying A_(3)-groups is an old problem.In this paper,some general properties about A_(t)-groups are given.A_(3)-groups are completely classified up to isomorphism.Moreover,we determine the Frattini subgroup,the derived subgroup and the center of every A_(3)-group,and give the number of A_(1)-subgroups and the triple(μ_(0),μ_(1),μ_(2))of every A_(3)-group,whereμi denotes the number of A_(i)-subgroups of index p of A_(3)-groups.Qinhai Zhang Libo Zhao Miaomiao Li Yiqun Shen 2015Communications in Mathematics and Statistics2015,3,1:9
11Health effects of fine particles(PM_(2.5)) in ambient air显示文摘Air pollutants have serious health effects on human beings.The 2010 Global Burden of Disease study reports that each year,ambient particulate matter(PM2.5,particles with aerodynamic diameter<2.5 micrometer)is causing 3.2 million premature deaths globally,and 1.2 million in China alone.Ambient PM pollution ranked fourth among all risk factors in China[1].HAN YiQun ZHU Tong 2015Science China(Life Sciences)2015,58,6:9
12Exosomes:key players in cancer and potential therapeutic strategy显示文摘Exosomes are extracellular vesicles secreted by most eukaryotic cells and participate in intercellular communication.The components of exosomes,including proteins,DNA,mRNA,microRNA,long noncoding RNA,circular RNA,etc.,which play a crucial role in regulating tumor growth,metastasis,and angiogenesis in the process of cancer development,and can be used as a prognostic marker and/or grading basis for tumor patients.Hereby,we mainly summarized as followed:the role of exosome contents in cancer,focusing on proteins and noncoding RNA;the interaction between exosomes and tumor microenvironment;the mechanisms that epithelial-mesenchymal transition,invasion and migration of tumor affected by exosomes;and tumor suppression strategies based on exosomes.Finally,the application potential of exosomes in clinical tumor diagnosis and therapy is prospected,which providing theoretical supports for using exosomes to serve precise tumor treatment in the clinic.Jie Dai Yangzhou Su Suye Zhong Li Cong Bang Liu Junjun Yang Yongguang Tao Zuping He Chao Chen Yiqun Jiang 2020Signal Transduction and Targeted Therapy2020,5,1:8
13Regulatory effects of stage-treatment with established Chinese herbal formulas on inflammatory mediators in pediatric asthma显示文摘OBJECTIVE: To explore the regulatory effects of established Chinese herbal formulas on inflammatory mediators released during asthma attacks, and to elucidate the molecular mechanism of Traditional Chinese Medicine in the treatment of asthma. METHODS: Seventy-five asthmatic children were randomly divided into a Chinese medication group(45 cases) and a Western medication control group(30 cases). Patients in the Chinese medication group were treated with a series of established Chinese herbal formulas, whereas the Western medication control group received a leukotriene receptor antagonist and a bronchial relaxant. Real-time PCR was used to determine the mRNA expression levels of interleukin(IL)-4, cysteinyl leukotriene receptor 1(CysLTR1), and interferon(IFN)-γ in peripheral blood mononuclear cells before and after treatment. Enzyme-linked immunosorbent assay was used to measure the peripheral blood levels of IL-4, leukotriene(LTE)-4, and INF-γ before and after treatment. RESULTS: After treatment, the mRNA expression levels of IL-4 and CysLTR1 were down-regulated(P< 0.01) and the mRNA expression levels of IFN-γ were up-regulated(P<0.05) in the Chinese medication and Western medication groups; no significant difference was found between the two groups. In the Chinese medication group, IL-4 blood level was decreased and it was significantly different from that in the Western medication group(P<0.05); there was also a significant increase in IFN-γ blood levels after treatment with Chinese medication(P<0.05). There were no significant differences in LTE-4 blood levels between the two groups before and after treatment(P>0.05). CONCLUSION: Chinese medication has a regulatory effect on leukotriene receptor gene expression and the imbalance of Th1/Th2 immune cells during asthma attacks in pediatric patients.Suhuan Li Yonghong Wang Yumin Shi JianYu Wen Sun Hong Hu Yiqun Zhang 2013Journal of Traditional Chinese Medicine2013,33,6:8
14Resorbable polymer electrospun nanofibers:History,shapes and application for tissue engineering显示文摘Resorbable polymer electrospun nanofiber-based materials/devices have high surface-to-volume ratio and often have a porous structure with excellent pore interconnectivity,which are suitable for growth and development of different types of cells.Due to the huge advantages of both resorbable polymers and electrospun nano fibers,re sorbable polymer electrospun nanofibers(RPENs)have been widely applied in the field of tissue engineering.In this paper,we will mainly introduce RPENs for tissue engineering.Firstly,the electrospinning technique and electrospun nanofiber architectures are briefly introduced.Secondly,the application of RPENs in the field of tissue engineering is mainly reviewed.Finally,the advantages and disadvantages of RPENs for tissue engineering are discussed.This review will provide a comprehensive guide to apply resorbable polymer electrospun nanofibers for tissue engineering.Tingting Wu Mengzhen Ding Cuiping Shi Yiqun Qiao Panpan Wang Ruirui Qiao Xichang Wang Jian Zhong 2020Chinese Chemical Letters2020,31,3:8
15The geochemical characteristics,geochronology and tectonic significance of the Carboniferous volcanic rocks of the Santanghu area in northeastern Xinjiang,China显示文摘The Santanghu area is located on the northeastern margin of the Junggar Basin,northern Xinjiang,Northwest China.The Carboniferous volcanic rocks in this area are widely distributed in Kaokesaiergaishan,Santanghu,Daheishan and Naomaohu districts,which are located to the north of the Kalameili Fault.These rocks,sourced from a cognate magma,consist of basic,intermediate,and acidic lavas,and pyroclastic rock.The basic volcanic rocks are enriched with large-ion lithophile elements(LILE),but are relatively depleted in high field strength elements(HFSE),and have an obvious negative Nb-Ta-Ti anomaly.They were most probably derived from a depleted mantle source,and during their ascent,these magmas were not contaminated by the crustal material as they underwent magma crystallization differentiation.Based on the Carboniferous volcanic assemblage and geochemical data,it is apparent that the early Carboniferous volcanism occurred in a subduction-related tectonic setting.New LA-ICP-MS zircon U-Pb analyses constrain the age of the andesite within the volcanic rocks as the early Carboniferous(328.9-331.3 Ma).Combined with the regional geological record,comprehensive analysis of the isotope geochronological data indicates that the subduction of the Junggar Ocean predates the early Carboniferous,and that the Santanghu island arc magmatism was induced by the subduction of the Junggar Ocean in the Carboniferous.LI Wei LIU YiQun DONG YunPeng ZHOU XiaoHu LIU XiaoMing LI Hong FAN TingTing ZHOU DingWu XU XueYi CHEN JunLu 2013Science China Earth Sciences2013,56,8:8
16Advanced Ni-Nx-C single-site catalysts for CO2 electroreduction to CO based on hierarchical carbon nanocages and S-doping显示文摘Metal-nitrogen-carbon materials are promising catalysts for CO2 electroreduction to CO. Herein, by taking the unique hierarchical carbon nanocages as the support, an advanced nickel-nitrogen-carbon single-site catalyst is conveniently prepared by pyrolyzing the mixture of NiCl2 and phenanthroline, which exhibits a Faradaic efficiency plateau of > 87% in a wide potential window of −0.6 – −1.0 V. Further S-doping by adding KSCN into the precursor much enhances the CO specific current density by 68%, up to 37.5 A·g−1 at −0.8 V, along with an improved CO Faradaic efficiency plateau of > 90%. Such an enhancement can be ascribed to the facilitated CO pathway and suppressed hydrogen evolution from thermodynamic viewpoint as well as the increased electroactive surface area and improved charge transfer fromkinetic viewpoint due to the S-doping. This study demonstrates a simple and effective approach to advanced electrocatalysts by synergetic modification of the porous carbon-based support and electronic structure of the active sites.Yiqun Chen Yuejian Yao Yujian Xia Kun Mao Gongao Tang Qiang Wu Lijun Yang Xizhang Wang Xuhui Sun Zheng Hu 2020Nano Research2020,13,10:8
17Sedimentary fill history of the Huicheng Basin in the West Qinling Mountains and associated constraints on Mesozoic intracontinental tectonic evolution显示文摘The Qinling Orogenic Belt is divided commonly by the Fengxian-Taibai strike-slip shear zone and the Huicheng Basin into the East and West Qinling mountains,which show significant geological differences after the Indosinian orogeny.The Fengxian-Taibai fault zone and the Meso-Cenozoic Huicheng Basin,situated at the boundary of the East and West Qinling,provide a natural laboratory for tectonic analysis and sedimentological study of intracontinental tectonic evolution of the Qinling Orogenic Belt.In order to explain the dynamic development of the Huicheng Basin and elucidate its post-orogenic tectonic evolution at the junction of the East and West Qinling,we studied the geometry and kinematics of fault zones between the blocks of West Qinling,as well as the sedimentary fill history of the Huicheng Basin.First,we found that after the collisional orogeny in the Late Triassic,post-orogenic extensional collapse occurred in the Early and Middle Jurassic within the Qinling Orogenic Belt,resulting in a series of rift basins.Second,in the Late Jurassic and Early Cretaceous,a NE-SW compressive stress field caused large-scale sinistral strike-slip faults in the Qinling Orogenic Belt,causing intracontinental escape tectonics at the junction of the East and West Qinling,including eastward finite escape of the East Qinling micro-plate and southwest lateral escape of the Bikou Terrane.Meanwhile,the strike-slip-related Early Cretaceous sedimentary basin was formed with a right-order echelon arrangement in sinistral shear zones along the southern margin of the Huicheng fault.Overall during the Mesozoic,the Huicheng Basin and surrounding areas experienced four tectonic evolutionary stages,including extensional rift basin development in the Early and Middle Jurassic,intense compressive uplift in the Late Jurassic,formation of a strike-slip extensional basin in the Early Cretaceous,and compressive uplift in the Late Cretaceous.LI Wei DONG YunPeng GUO AnLin LIU XiaoMing LIU YiQun ZHA XianFeng ZHANG KuaiLe 2013Science China Earth Sciences2013,56,10:7
18The USDA cucumber (Cucumis sativus L.) collection: genetic diversity, population structure, genome-wide association studies, and core collection development显示文摘Germplasm collections are a crucial resource to conserve natural genetic diversity and provide a source of novel traits essential for sustained crop improvement.Optimal collection,preservation and utilization of these materials depends upon knowledge of the genetic variation present within the collection.Here we use the high-throughput genotyping-by-sequencing(GBS)technology to characterize the United States National Plant Germplasm System(NPGS)collection of cucumber(Cucumis sativus L.).The GBS data,derived from 1234 cucumber accessions,provided more than 23 K high-quality single-nucleotide polymorphisms(SNPs)that are well distributed at high density in the genome(~1 SNP/10.6 kb).The SNP markers were used to characterize genetic diversity,population structure,phylogenetic relationships,linkage disequilibrium,and population differentiation of the NPGS cucumber collection.These results,providing detailed genetic analysis of the U.S.cucumber collection,complement NPGS descriptive information regarding geographic origin and phenotypic characterization.We also identified genome regions significantly associated with 13 horticulturally important traits through genome-wide association studies(GWAS).Finally,we developed a molecularly informed,publicly accessible core collection of 395 accessions that represents at least 96%of the genetic variation present in the NPGS.Collectively,the information obtained from the GBS data enabled deep insight into the diversity present and genetic relationships among accessions within the collection,and will provide a valuable resource for genetic analyses,gene discovery,crop improvement,and germplasm preservation.Xin Wang Kan Bao Umesh K.Reddy Yang Bai Sue A.Hammar Chen Jiao Todd C.Wehner Axel O.Ramírez-Madera Yiqun Weng Rebecca Grumet Zhangjun Fei 2018Horticulture Research2018,5,1:7
19Prescriptions from Traditional Chinese Medicine compared with salbutamol and montelukast for the treatment of pediatric asthma: a randomized controlled trial显示文摘OBJECTIVE: To compare the effects of a series of Traditional Chinese Medicine(TCM) empirical prescriptions with salbutamol and montelukast(SM) in children with asthma.METHODS: A total of 182 children with asthma were randomized into the TCM group(n = 97) or SM group(n = 85). Patients in the TCM group were treated with a series of TCM prescriptions, whereas those in the SM group received salbutamol and montelukast; both groups received their respective treatment for 12 weeks. Asthma control, changes in scores of TCM symptom patterns, and asthma symptom control(SC) scores after treatment were compared between the two groups.RESULTS: A higher percentage of patients in the TCM group had asthma control compared withthose in the SM group(91.67% and 76.83%, respectively, P = 0.006). Scores for abnormal feces(P <0.001), hyperhidrosis(P < 0.001), and tongue appearance(P = 0.001) in the TCM group were significantly better than those in the SM group. However,the total scores of TCM symptom patterns and SC scores did not differ significantly between the two groups(P > 0.05).CONCLUSION: Compared with salbutamol and montelukast, the TCM prescriptions tested were better for symptom control in children with asthma.Du Hui Wang Yonghong Yu Jian Shi Yumin Li Suhuan Sun Wen Zhang Yiqun Hu Hong 2017Journal of Traditional Chinese Medicine2017,37,4:7
20Geochemical characteristics and tectonic setting of the Middle Permian Tiaohu Formation mafic-ultramafic rocks of Santanghu area, Xinjiang, Northwest China显示文摘Santanghu area in northeastern Xinjiang region of Northwest China is an important component of the Central Asian Orogenic Belt(CAOB), in which the dynamic mechanism of Permian magmatism is controversial. In Santanghu area is exposed a thick succession of the Middle Permian basalts, including a small amount of picritic basalts and andesites, known as the Tiaohu Formation. The picritic basalts contain cumulate olivine, and have whole-rock Mg# up to 0.68–0.77; the basalts exhibit porphyritic or doleritic textures, and have relatively low Mg# of 0.41–0.54, typical of evolved magmas. The mafic-ultramafic rocks of the Tiaohu Formation are slightly enriched in Light Rare Earth Elements(LREEs), and exhibit negative Nb and Ti anomalies. They also have high Ti O2 content, and Nb/Y and Zr/Yb ratios greater than those of island arc volcanic rocks. Relatively low initial Sr isotopic ratios and high positive εNd(t) and εHf(t) values argue against contamination by ancient continental crust, and suggest formation of the Tiaohu Formation by partial melting of relatively refractory depleted lithospheric mantle that underwent metasomatism and extraction by fluid from the subducted slab. In addition, up to 38% olivine in picritic basalts indicates high-degree partial melting of lithospheric mantle, and the underlying Lucaogou Formation contains fragments of ultra-alkaline magmatic rocks that originated in the deep mantle. These observations imply wide-spread underplating in Santanghu area, which may have been associated with a mantle plume.WANG ShuangShuang LIU YiQun ZHANG HongFu ZHOU DingWu JIAO Xin NAN Yun 2015Science China Earth Sciences2015,58,11:7
返回顶部 每页显示:
共22页 首页 上一页 第1页 下一页 末页 /22 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费