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43篇 您的检索式:作者名="Ruixia Yang"
    题名 作者 年代 出处 被引量
1Evolution of permafrost in China during the last 20 ka显示文摘The formation and evolution of permafrost in China during the last 20 ka were reconstructed on the basis of large amount of paleo-permafrost remains and paleo-periglacial evidence, as well as paleo-glacial landforms, paleo-flora and paleofauna records. The results indicate that, during the local Last Glacial Maximum(LLGM) or local Last Permafrost Maximum(LLPMax), the extent of permafrost of China reached 5.3×106-5.4×106 km2, or thrice that of today, but permafrost shrank to only0.80×106-0.85×106 km2, or 50% that of present, during the local Holocene Megathermal Period(LHMP), or the local Last Permafrost Minimum(LLPMin). On the basis of the dating of periglacial remains and their distributive features, the extent of permafrost in China was delineated for the two periods of LLGM(LLPMax) and LHMP(LLPMin), and the evolution of permafrost in China was divided into seven periods as follows:(1) LLGM in Late Pleistocene(ca. 20000 to 13000-10800 a BP)with extensive evidence for the presence of intensive ice-wedge expansion for outlining its LLPMax extent;(2) A period of dramatically changing climate during the early Holocene(10800 to 8500-7000 a BP) when permafrost remained relatively stable but with a general trend of shrinking areal extent;(3) The LHMP in the Mid-Holocene(8500-7000 to 4000-3000 a BP)when permafrost degraded intensively and extensively, and shrank to the LLPMin;(4) Neoglaciation during the late Holocene(4000-3000 to 1000 a BP, when permafrost again expanded;(5) Medieval Warming Period(MWP) in the late Holocene(1000-500 a BP) when permafrost was in a relative decline;(6) Little Ice Age(LIA) in the late Holocene(500-100 a BP), when permafrost relatively expanded, and;(7) Recent warming(during the 20 th century), when permafrost continuously degraded and still is degrading. The paleo-climate, geography and paleopermafrost extents and other features were reconstructed for each of these seven periods.Huijun JIN Xiaoying JIN Ruixia HE Dongliang LUO Xiaoli CHANG Shaoling WANG Sergey S MARCHENKO Sizhong YANG Chaolu YI Shijie LI Stuart A HARRIS 2019Science China Earth Sciences2019,62,8:6
2Flavone Content and Bioactivity of Aqueous-Ethanolic Extracts of Phellinus Fruit Bodies显示文摘The flavone content of aqueous ethanolic extracts of Phellinus fruit bodies obtained from seven different locations was determined.Anti-tumor and antioxidant activities associated with the extracts were investigated in vitro using the Alamar Blue assay and a chemiluminecence-based method,respectively.Extracts of the seven Phellinus samples generated very similar HPLC profiles in qualitative terms although the areas of several peaks varied according to the sample type indicating quantitative differences in the case of some components.All the extracts,especially those of artificially cultivated Phellinus baumii fruit bodies,inhibited L1210 tumor cell proliferation and exhibited superoxide radical scavenging activity although there was no obvious correlation with flavone content.HAO Ruixia ZHOU Shuai YANG Yan XI Junzhe LI Weiyao TANG Qingjiu WANG Chenguang 2008食用菌学报2008,15,2:6
3High-performance asymmetric electrodes photodiode based on Sb/WSe2 heterostructure显示文摘Two-dimensional (2D) van der Waals (vdWs) metal-semiconductor heterostructures with atomically sharp interface and matched work functions have recently attracted great attention due to their unique electronic and optoelectronic properties. Here we report the vapor phase epitaxial growth of large-scale vertical Sb/WSe2 metal-semiconductor vdWs heterostructures with uniform stacking orientation. Compared with the growth on S1O2/S1 substrate, the thick ness of Sb nan osheet on WSe2 can be reduced effectively to mono layer. We con struct Sb-WSe2-Au asymmetric electrodes photodiode based on the Sb/WSe2 heterostructures. Electrical transport measurements indicate that the photodiode show obvious rectifying effect. Optoelectronic characterizations show prominent photoresponse with a high photoresposivity of 364 mA/W, a fast response time of less than 8 ms, a large open-circuit voltage of 0.27 V and a maximum electrical power output of 0.11 nW. The direct growth of high-quality metal-semiconductor vdWs heterostructures may open up new realms in 2D functional electronics and optoelectronics.Xiao Liu Guangzhuang Sun Peng Chen Junchi Liu Zhengwei Zhang Jia Li Huifang Ma Bei Zhao Ruixia Wu Weiqi Dang Xiangdong Yang Chen Dai Xuwan Tang Zhuojun Chen Lili Miao Xingqiang Liu Bo Li Yuan Liu Xidong Duan 2019Nano Research2019,12,2:5
4Mineral photoelectrons and their implications for the origin and early evolution of life on Earth显示文摘Energy is the key issue of all life activities.The energy source and energy yielding pathway are the key scientific issues of the origin and early evolution of life on Earth.Current researches indicate that the utilization of solar energy in large scale by life was an important breaking point of the early evolution of life on Earth and afterwards life gradually developed and flourished.However,in the widespread biochemical electron transfer of life activities,it is still not clear whether the electron source is sun or how electrons originated from sun.For billions of years,the ubiquitous semiconducting minerals in epigeosphere absorb solar energy,forming photoelectrons and photoholes.In reductive and weak acidic environment of early Earth,when photoholes were easily scavenged by reducing matters,photoelectrons were separated.Photoelectrons could effectively reduce carbon dioxide to organic matters,possibly providing organic matter foundation for the origin of life.Photoelectrons participated in photoelectron transfer chains driven by potential difference and transfer into primitive cells to maintain metabolisms.Semiconducting minerals,by absorbing ultraviolet,also protected primitive cells from being damaged by ultraviolet in the origin of life.Due to the continuous photoelectrons generation in semiconducting minerals and utilization by primitive cells,photoelectrons from semiconducting minerals’photocatalysis played multiple roles in the origin of life on early Earth,such as organic synthesis,cell protection,and energy supply.This mechanism still plays important roles in modern Earth surface systems.LU AnHuai WANG Xin LI Yan DING HongRui WANG ChangQiu ZENG CuiPing HAO RuiXia YANG XiaoXue 2014Science China Earth Sciences2014,57,5:5
5Telmisartan promotes proliferation and differentiation of endothelial progenitor cells via activation of Akt显示文摘Cao Zheng Yang Yong Hua Xianping Wu Ruixia Wang Junfeng Zhou Ming Zhan Zhongqun Chen Pingying 2014Chinese Medical Journal2014,,1:5
6The study of size-grade of prehistoric settlements in the Circum-Songshan area based on SOFM network显示文摘选择地点区域,文化层厚度,重要遗物和重要遗体为变量,分别地,我们把簇分析用于四个文化时期的古老的解决它是 Peiligang, Yangshao, Longshan 和 Xiashang 在 90003000 一 BP,在 Songshan 附近山。通过 SOFM (自我组织的特征地图) 的申请联网,古老的解决的每种类型被分类进不同尺寸等级。由这个工具, Peiligang 解决被划分成二个等级, Yangshao 和 Longshan 分别地,解决被划分成三个等级, Xiashang 解决被划分成四个等级。结果建议古老的解决的尺寸等级差异不在在这个区域的 Peiligang 时期期间是重要的。在中间迟了的 Yangshao 时期(5000 一 BP ) 附近,古老的解决的尺寸等级差异开始出现了,在 Longshan 时期期间并且最后继续的一个过程在 Xiashang 时期成熟。而且,结果在一个特别时期在文化特征反映了地区性的差别,它主要被代表因为有三个 Peiligang 文化系统,在不同区域散布。如此的差别也在在夏和商文化之间的空间分发的特征存在。在 Circum-Songshan 区域基于古老的解决的尺寸等级学习,从那时起, SOFM 网络方法用这个方法对古老的解决的尺寸等级分类很合适,这被发现,邻近的房间将竞争并且向对方学习,由地点面积的不确在分类上减少了效果的一个好处。LU Peng TIAN Yan YANG Ruixia 2013Journal of Geographical Sciences2013,23,3:4
7Evolution of permafrost in Northeast Chinasince the Late Pleistocene显示文摘In Northeast China, permafrost advanced and retreated several times under the influences of fluctuating paleo-climates and paleo-environments since the Late Pleistocene. During the last 60 years, many new data were obtained and studies were conducted on the evolution of permafrost in Northeast China, but so far no systematic summary and review have been made. Based on sedimentary sequences, remains of past permafrost, paleo-flora and-fauna records, and dating data, permafrost evolution since the Late Pleistocene has been analyzed and reconstructed in this paper. Paleo-temperatures reconstructed from the remains of past permafrost and those from paleo-flora and-fauna are compared, and thus the southern limit of permafrost(SLP) in each climate period is inferred by the relationship of the permafrost distribution and the mean annual air/ground temperatures(MAAT/MAGT). Thus, the evolutionary history of permafrost is here divided into five stages:(1) the Late Pleistocene(Last Glaciation, or LG)(65 to 10–8.5 ka), the Last Glaciation Maximum(LGM, 21–13 ka) in particular, the coldest period in the latest history with a cooling of about 6~10 ?C, characterized by extensive occurrences of glaciation, flourishing Mammathas-Coelodonta Faunal Complex(MCFC), widespread aeolian deposits, and significant sea level lowering, and permafrost greatly expanded southwards almost to the coastal plains(37?N–41?N);(2) the Holocene Megathermal Period(HMP, 8.5–7.0 to 4.0–3.0 ka), 3~5 ?C warmer than today, permafrost retreated to about 52°N;(3) the Late Holocene Cold Period(Neoglaciation)(4.0–3.0 to 1.0–0.5 ka), a cooling of 1~3 ?C, some earlier thawed permafrost was refrozen or attached, and the SLP invaded southwards to 46?N;(4) the Little Ice Age(LIA, 500 to 100–150 a), the latest cold period with significant permafrost expansion; and(5) climate warming since the last century, during which Northeast China has undergone extensive permafrost degradation. The frequent and substantial expansions and retreats of permafrost have greatly impacted cold-region environments in Northeast China. North of the SLP during the HMP, or in the present continuous permafrost zone, the existing permafrost was largely formed during the LG and was later overlapped by the permafrost formed in the Neoglaciation. To the south, it was formed in the Neoglaciation. However, many aspects of permafrost evolution still await further investigations, such as data integration, numerical reconstruction, and merging of Chinese permafrost history with those of bordering regions as well as collaboration with related disciplines. Of these, studieson the evolution and degradation of permafrost during the past 150 years and its hydrological, ecological, and environmental impacts should be prioritized.HuiJun Jin XiaoLi Chang DongLiang Luo RuiXia He LanZhi Lu SiZhong Yang DongXin Guo XueMei Chen Stuart A.Harris 2016Research in Cold and Arid Regions2016,8,4:3
8Image fusion based on a new contourlet packet显示文摘Shuyuan Yang Min Wang Licheng Jiao Ruixia Wu Zhaoxia Wang 2009Information Fusion2009,,2:2
9Direct van der Waals epitaxial growth of 1D/2D Sb2Se3/WS2 mixed-dimensional p-n heterojunctions显示文摘The mixed-dimensional integration of two-dimensional (2D) materials with non-2D materials can give rise to prominent advances in performance or function.To date,the mixed-dimensional one-dimensional (1D)/2D heterostructures have been fabricated using various physical assembly approaches.However,direct epitaxial growth method which has notable advantages in preparing large-scale products and obtaining perfect interfaces is rarely investigated.Herein,we demonstrate for the first time the direct synthesis of the 1D/2D mixed-dimensional heterostructures by sequential vapor-phase growth of Sb2Se3 nanowires on WS2 monolayers.X-ray diffraction (XRD) pattern and Raman spectrum confirm the composition of the Sb2Se3/NS2 heterostructures.Transmission electron microscope (TEM) measurement demonstrates high quality of the heterostructures.Electrical transport characterization reveals that Sb2Se3 nanowire exhibits p-type characteristic and that WS2 monolayer exhibits n-type behavior,and that the p-n diode from 1D/2D mixed-dimensional Sb2Se3/WS2 heterostructure possesses obvious current rectification behavior.Optoelectronic measurements of the heterostructures show apparent photovoltaic response with an open-circuit voltage of 0.19 V,photoresponsivity of 1.51 A/W (Vds =5 V) and fast response time of less than 8 ms.The van der Waals epitaxial growth mode of Sb2Se3 nanowires on WS2 monolayers is verified by stripping the Sb2Se3 nanowire from the heterostructures using tape.Together,the direct van der Waals epitaxy opens a facile pathway to 1D/2D mixed-dimensional heterostructures for functional electronic and optoelectronic devices.Guangzhuang Sun Bo Li Jia Li Zhengwei Zhang Huifang Ma Peng Chen Bei Zhao Ruixia Wu Weiqi Dang Xiangdong Yang Xuwan Tang Chen Dai Ziwei Huang Yuan Liu Xidong Duan Xiangfeng Duan 2019Nano Research2019,12,5:2
10In-situ transformation of Co(OH)_(2) into NH_(4)CoPO_(4)·H_(2)O on Co foil: 3D self-supported electrocatalyst with asymmetric local atomic and electronic structure for enhanced oxygen evolution reaction显示文摘Development of high efficient and stable water oxidation catalysts is essential for the realization of industrial water-splitting systems. Herein, a novel approach involving an in-situ transformation of Co(OH)2 nanosheets into NH4 CoPO4·H2 O nanoplates on Co foil is reported. As a 3 D self-supported oxygen revolution reaction(OER) electrocatalyst, the as-prepared NH4 CoPO4·H2 O/Co exhibits remarkable catalytic activity and exceptional stability. Specifically, it can deliver a current density of 10 m A cm^(-2) at a quite low overpotential of 254 m V with a small Tafel slope of 64.4 m V dec-1 in alkaline electrolyte. Through experimental study and theoretical analysis, the excellent OER performance can be attributed to enriched exposed active sites, favorable electron/proton transfer and mass transport, and its unique asymmetric local atomic and electronic structure. Thus, this present research not only provides a practicable in-situ transformation strategy to design 3 D self-supported electrocatalysts, but also enlightens a new way of developing transition-metal phosphates for efficient and stable water oxidation at atomic level.Quande Che Xiaobin Xie Qian Ma Junpeng Wang Yuanna Zhu Ruixia Shi Ping Yang 2020Journal of Energy Chemistry2020,29,12:2
11Stability,acidity and interaction properties of [Bmim][SbF_6] coupled with concentrated sulfuric acid显示文摘Ionic liquid coupled with strong acid systems presents considerable promise in some catalytic fields.In the present work,the multiple complex systems composed by 98 wt%concentrated sulfuric acid and[Bmim][SbF_6]were investigated in the terms of stability,acidity and interaction properties.It was found that acidolysis of[Bmim][SbF_6]occurred in the 98 wt%concentrated sulfuric acid accompanied by HF releasing and SbF_6~ degrading to[SbF_(6-y)XHSO_4]_y]^-.The species after acidolysis in the multiple complex systems were checked and confirmed by electrospray ionization mass spectrometry(ESI-MS),Fourier transform infrared spectroscopy(FT-IR),~1H NMR and ^(19)F NMR.Acidity increased slightly with less than 1 wt%[Bmim][SbF_6]addition,while decreased with more proportion,which was determined based on the Hammett acidity functions H_0,using ^(13)C NMR.The strong hydrogen bond S-O-H…F of interaction among the multiple complex systems was confirmed by molecular dynamic simulation.Honghua Zhang Ruixia Liu Ruirui Zhang Feng Huo Zhiqiang Yang Bin He Suojiang Zhang Yanji Wang 2017Science China Chemistry2017,60,9:2
12Comparative catalytic study on butene/isobutane alkylation over LaX and CeX zeolites: The influence of calcination atmosphere显示文摘Lanthanum-containing(LaX)and cerium-containing X zeolites(CeX)were prepared by a doubleexchange,double-calcination method.By changing the calcination atmospheres between nitrogen and air,the Ce^(IV) contents in CeX zeolites were adjusted and their impacts on physicochemical properties and catalytic performance in isobutane alkylation were established.The crystallinity of CeX zeolite was found to be negatively correlated with the Ce^(IV) content.This i s believed to be due to the water formed during the oxidation of Ce^(III),which facilitates the framework dealumination.As a consequence,calcining in air resulted in a great elimination of strong Brønsted acid sites while under nitrogen protection,this phenomenon was mostly hindered and the sample’s acidity was preserved.When tested in a continuously flowed slurry reactor,the catalyst lifetime for isobutane alkylation was found to be linearly related to the strong Brønsted acid concentration.In addition,Ce^(3+)was found more benefit for the hydride transfer compared with La^(3+),which is ascribed to the stronger polarization effect on the CH bond of isobutane.Moreover,the decline of hydride transfer activity can be slowed down by the catalytic cracking of the bulky molecules.Based on the product distribution,a new catalytic cycle of dimethylhexanes(DMHs)involving a direct formation of isobutene rather than tert-butyl carbocation was proposed in isobutane alkylation.Zhiqiang Yang Ruirui Zhang Honghua Zhang Hongguo Tang Ruixia Liu Suojiang Zhang 2022Chinese Journal of Chemical Engineering2022,35,6:2
13Interaction of curcumin with intravenous immunoglobulin: A fluorescence quenching and Fourier transformation infrared spectroscopy study显示文摘Yongchun Liu Zhengyin Yang Juan Du Xiaojun Yao Ruixia Lei Xudong Zheng Jianning Liu Huaisheng Hu Hong Li 2008Immunobiology2008,,:1
14Probiotic properties of lactic acid bacteria isolated from stool samples of longevous people in regions of Hotan, Xinjiang and Bama, Guangxi, China显示文摘GU Ruixia YANG Zhenquan LI Zhenghua 2008Anaerobe2008,14,6:1
15Influence of heat treatment conditions on release of chlorine from Datong coal显示文摘Ruixia Guo Jianli Yang Zhenyu Liu 2003Journal of Analytical and Applied Pyrolysis2003,,1:1
16Vapor phase growth of two-dimensional PdSe2 nanosheets for high-photoresponsivity near-infrared photodetectors显示文摘Palladium diselenide(PdSe2),a stable layered material with pentagonal structure,has attracted extensive interest due to its excellent electrical and optoelectronic performance.Here,we report a reliable process to synthesize PdSe2 via chemical vapor deposition(CVD)method.Through systematic regulation of temperature in the growth process,we can tune the thickness,size,nucleation density and morphology of PdSe2 nanosheets.Field-effect transistors based on PdSe2 nanosheets exhibit n-type behavior and present a high electron mobility of 105 cm^2·V^−1·s^−1.The electrical property of the devices after 6 months keeping in the air show little change,implying outstanding air-stability of PdSe2.In addition,PdSe2 near-infrared photodetector shows a photoresponsivity of 660 A·W^−1 under 914 nm laser.These performances are better than those of most CVD-grown 2D materials,making ultrathin PdSe2 a highly qualified candidate material for next-generation optoelectronic applications.Weiting Xu Jiayang Jiang Huifang Ma Zhengwei Zhang Jia Li Bei Zhao Ruixia Wu Xiangdong Yang Hongmei Zhang Bailing Li Weining Shu Zucheng Zhang Bo Li Yuan Liu Lei Liao Xidong Duan 2020Nano Research2020,13,8:1
17Influence of Heat Treatment Conditions on Release of Chlorine from Datong Coal显示文摘Guo Ruixia Yang Jianli Liu Zhenyu 2004Journal of Analytical and Applied Pyrolysis2004,71,:1
18Behavior of trace elements during pyrolysis of coal in a simulated drop-tube reactor显示文摘Guo Ruixia Yang Jianli Liu Zhenyu 2004Fuel2004,83,6:1
19Transformation behavior of trace elements during coal pyrolysis显示文摘Guo Ruixia Yang Jianli Liu Dongyan 2002Fuel Processing Technology2002,7778,20:1
20Image fusion based on a new contourlet packet显示文摘Shuyuan Yang Min Wang Licheng Jian Ruixia Wu Zhaoxia Wang 2010Information Fusion2010,11,2:1
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