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194篇 您的检索式:作者名="Zhen P"
    题名 作者 年代 出处 被引量
1Responses of Plant Community and Soil Properties to Inter-Annual Precipitation Variability and Grazing Durations in a Desert Steppe in Inner Mongolia显示文摘Grazing can dramatically affect arid grassland communities that are very vulnerable to environmental changes due to its relatively short and sparse ground coverage, low biomass, sandy soil and inter-annual precipitation found in the desert steppe. The study investigates the effects of different grazing durations on vegetation and soil properties of a desert steppe community. The experiment was conducted in Xisu Banner in Inner Mongolia with five treatments: CG(continuous grazing), 40UG(40 d ungrazed), 50UG(50 d ungrazed), 60UG(60 d ungrazed) and UG(ungrazed). The biomass of both shrub and annual-biennial plant communities were significantly decreased by CG. Continuous grazing and 40UG significantly reduced the ANPP(aboveground net primary productivity) by the end of the three year study. 60UG treatment increased soil organic carbon(OC), total nitrogen concentration(TN) and total phosphorus concentration(TP) concentrations and 50UG increased the TN and total phosphorus concentration(TK) concentrations, whereas CG, 40UG and 50UG decreased soil OC, TP and available phosphorus concentration(AP) concentrations. The perennial plant species of the desert steppe were generally tolerant for grazing. The annual-biennial plant species had large variability in ANPP because of the inter-annual precipitation. Our results highlight that inter-annual precipitation variations could strongly modify the community responses to grazing in arid ecosystems.WANG Zhen YUN Xiang-jun WEI Zhi-jun Michael P Schellenberg WANG Yun-feng YANG Xia HOU Xiang-yang 2014Journal of Integrative Agriculture2014,13,6:5
2Subepicardial endothelial cells invade the embryonic ventricle wall to form coronary arteries显示文摘冠的动脉把血流动带到心肌肉。理解冠的动脉的发展程序提供卓见进冠的动脉疾病的治疗。多重来源被描述了为包括 proepicardium,湾穴 venosus (SV ) ,和心内膜贡献冠的动脉。然而,冠的容器的发展起源仍然在强烈学习下面。我们为学习冠的开发生产了一个新基因工具,一只 AplnCreER 老鼠在开发冠的容器明确地衬里 recombinase,它表示可诱导的 Cre。冠的开发和 AplnCreER 命运跟踪的预定正式就职的定量分析证明 subepicardial endothelial 房间(EC ) 的子孙两个都入侵紧缩的心肌层形成冠的动脉并且在表面上留下生产静脉。我们发现这些 subepicardial EC 是 intramyocardial 的主要来源在发展中的心的冠的容器。在 vitro 将生物的活组织移植于培养基中培养,试金显示这些 subepicardial EC 的多数从 SV 和中庭的心内膜,然而并非从室的心内膜产生。Apln 积极的房间的同种细胞的分析显示单个 subepicardial EC 同等地作出贡献到冠的动脉和静脉。一起,这些数据建议 subepicardial EC 是 intramyocardial 的主要来源在室的冠的动脉墙,和那冠的动脉和静脉在发展中的心有普通起源。Xueying Tian Tianyuan Hu Hui Zhang Lingjuan He Xiuzhen Huang Qiaozhen Liu Wei Yu Liang He Zhongzhou Yang Zhen Zhang Tao P Zhong Xiao Yang Zhen Yang Yan Yan Antonio Baldini Yunfu Sun Jie Lu Robert J Schwartz Sylvia M Evans Adriana C Gittenberger-de Groot Kristy Red-Horse Bin Zhou 2013Cell Research2013,23,9:3
3Structural optical and electrical properties of ZnO and ZnO-Al2O3 films prepared by dc magnetron sputtering 显示文摘Meng X Q Zhen W Guo J P 2000Appl Phys A2000,70,:1
4Acidic residues necessary for pyrophosphate-energized pumping and inhibition of the vacuolar H+-pyrophosphatase by N,N'-dicyclohexylcarbodiimide显示文摘Zhen R G Kim E J Rea P A 1997Journal of Biological Chemistry1997,272,22:1
5Genetic diversity and relationships within sweet kernel apricot and related Armenioca species based on sequence-related amplified polymorphism markers显示文摘Ai P F Zhen Z J Jin Z Z 2011Biochemical Systematics and Ecology2011,39,46:1
6Recurrence of the world' s largest green-tide in 2009 in Yellow Sea, China: porphyra yezoensis aquaculture rafts confirmed as nusery for macoralgal blooms 显示文摘Liu D Y Keesign J K Dong Z J Zhen Y Di B P Shi Y J Fearns P Shi P 2011Marine Pollution Bulletin2011,60,9:1
7An opportunistic routing mech anism for real-time voice service in mobile ad hoc networks显示文摘Zhen Y Wu M Q Wu D P 2010International Journal of Communication Systems2010,22,11:1
8A comparative analysis of serpin genes in the silkworm genome显示文摘Zhen Z Zhao P C Hua W 2009Genomies2009,93,4:1
9Survivin promotes glioma angiogenesis through vascular endothelial growth factor and basic fibroblast growth factor in vitro and in vivo显示文摘Wang P Zhen H Zhang J 2012Mol Carcinog2012,51,7:1
10All-purpose and plug-in Power-Law detectors for transient signals显示文摘Zhen Wang Willett P K 2001IEEE Transactions on Signal Processing2001,49,11:1
11La(Ni,Fe)O3 as a cathode material with high tolerance to chromium poisoning for solid oxide fuel cells显示文摘Zhen Y D Tok A I Y Jiang S P 2007Journal of Power Sources2007,170,1:1
12Two steroidal alkaloid glu- cosides fromveratrum taliense显示文摘Mizuo Mizuno Tan R X Zhen P 1990Phytochemistry1990,29,1:1
13Two steroidal alkaloid gluco- sides from veratrum taliense 显示文摘Mizuo Mizuno Tan R X Zhen P 1990Phytochemistry1990,29,1:1
14Global finite-element model makes a small contribution to intraplate seismic hazard estimation显示文摘Bird P Zhen Liu 1999Bull Seis Soc Am1999,6,:1
15Therapeutic obser-vation of lower limbs elephantiasis using raw Morus alba tablets显示文摘 Li S P Zhen T M 1992J Tradit Chin Med1992,33,10:1
16Evaluation of TCP Vegas: Emulation and Experiment显示文摘Ahn J S Danzig P B Liu Zhen 1995Computer Communication Review1995,25,4:1
17Progress in the treatment of chronicosteomyelitis 显示文摘Fan XH Liu XY Zhen P 2002Zhongguo Gu Shang/China J Orthop Trauma2002,,:1
18Platelet-derived growth factor stimulates sodium-dependent pitransport in osteoblastic cel Is phosphor-1ipase Cgammaand phosphatidylinositol V -kinase显示文摘Zhen X Bonjour J P Caverzasio J 1997JBone Miner Res1997,12,1:1
19Therapeutic obser-vation of chyluria using Morus alba extract capsules显示文摘 Li S P Zhen T M 1995Chin J Parasit Prevent Cure1995,8,1:1
20Effects of soil and foliar application of boron on nutrient uptake, growth, and yields of red bayberry显示文摘Meng C Jiang P Zhen J 2014International Journal of Fruit Science2014,14,3:1
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