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| 1 | Biological soil crust distribution in Artemisia ordosica communities along a grazing pressure gradient in Mu Us Sandy Land, Northern China显示文摘This study investigated the distribution pattern of biological soil crust (BSC) in Artemisia ordosica communities in Mu Us Sandy Land. Three experimental sites were selected according to grazing pressure gradient. In each experimental site, the total vegetation cover, A. ordosica cover, BSC cover, litter-fall cover, BSC degree of fragmentation, BSC thickness and soil properties were investigated in both fixed and semi-fixed sand dunes and simultaneously analyzed in the laboratory. The results showed that at the same grazing pressure, BSC cover and composition were significantly affected by the fixation degree of sand dunes. In addition, BSC cover in the fixed sand dunes was 83.74% on average, whereas it is proportionally dominated by 28% mosses, 21% lichens, and 51% algae. Meanwhile, BSC cover in the semi-fixed sand dunes was 23.54% on average, which is proportionally dominated by 6.3% mosses, 2.5% lichens, and 91.2% algae. Fine sand, organic matter, and total nitrogen (N) contents in the fixed sand dunes were all significantly higher than those in the semi-fixed sand dunes. Litter-fall cover decreased along the grazing pressure gradient, whereas BSC fragmentation degree increased. Fine sand content decreased along with the increase of grazing pressure, whereas medium sand content increased in both fixed and semi-fixed dunes. The organic matter and total N contents in the no grazing site were significantly higher than those in light and normal grazing sites. However, there were no significant differences between the light and normal grazing sites. In addition, there were also no significant differences in BSC thickness between the light and normal grazing sites in the fixed sand dunes. However, a significant decrease was observed in both BSC cover and thickness in the normal grazing site. The BSC in the semi-fixed dunes was more sensitive to disturbance. | JunHong ZHANG Bo WU YongHua LI WenBin YANG YaKai LEI HaiYan HAN Ji HE | 2013 | Journal of Arid Land2013，5，2： | 10 |
| 2 | Thermal Analysis of a Volumetric Solar Receiver显示文摘The volumetric receiver has received wide attention due to its high thermal efficiency. This paper studied a new type of a solid-liquid composite volumetric receiver. The heat transfer in a solid-liquid composite volumetric solar receiver was analyzed using a one-dimensional unsteady simulation model of the solid-liquid receiver. The model included absorption of the incident solar radiation by the glass window, the silicon carbide porous ceramic heat absorber panel and the water. The results were verified against experimental data for a volumetric receiver and the error did not exceed 10%. It can be used to predict the heat transfer in solid-liquid composite volumetric receivers. | CHEN Longfei YANG Ming LI Jinping BAI Yakai LI Xiaoxia TANG Wenxue YANG Nancong WANG Zhifeng | 2019 | Journal of Thermal Science2019，28，6： | 4 |
| 3 | 0il bleed from elastomeric thermal silicone conductive pads显示文摘 | Yuqi Chen Yakai Feng Jingqi Zhao Jingbo Shen Menghuang Feng | 2016 | Frontiers of Chemical Science and Engineering2016，10，4： | 3 |
| 4 | Biodegradable polydepsipeptides显示文摘 | YAKAI FENG JINTANG GUO | 2009 | Molecular Sciences2009，10，： | 1 |
| 5 | Synthesis of Poly from (3 S, 6R, S) -3- 6-methylmorpholine-2,5-dione 显示文摘 | Yakai Feng Doris Klee H artwig Hocker | 2002 | Maeromoleeular Chemistry and Physics2002，203，56： | 1 |
| 6 | A simple route for growing thin films of uniform ZnO nanorod arrays on functionalized Si surfaces显示文摘 | Liu C S Masuda Y Wu Y Yakai O | 2006 | Thin Solid Films2006，503，： | 1 |
| 7 | Fabrication and characterization of electrospun biocompatible PU/PEGMA hybrid nanofibers by in-situ UV photopolymerization显示文摘Poly(ethylene glycol) methacrylate (PEGMA) was introduced into a polyurethane (PU) solution in order to prepare hemocompatible electrospun membranes for potential application as small diameter vascular scaffolds. Crosslinked PU/PEGMA hybrid nanofibers were fabricated by a reactive electrospinning process with N,N′-methylenebisacrylamide (MBAm) as crosslinker and benzophenone (BP) as photoinitiator. The photoinduced polymerization and crosslinking reaction took place simultaneously during the electrospinning process. No significant difference in the membrane morphology was found by SEM when PEGMA content was less than 20 wt%. The crosslinked fibrous membranes of PU/PEGMA exhibit higher hydrophilicity and mechanical strength than PU membrane. These nanofibrous membranes are potential substitutes for artificial vascular scaffolds. | WANG HeYun FENG YaKai YUAN WenJie ZHAO HaiYang FANG ZiChen KHAN Musammir GUO JinTang | 2012 | Science China(Physics,Mechanics & Astronomy)2012，55，7： | 1 |
| 8 | Lipase-catalyzed ring-opening polymerization of 3 (S)-sec-butyhnoipholine- 2,5 -dione显示文摘 | Yakai F Doris K Hartwiq H | 2000 | Macromol Chem Phys2000，201，： | 1 |
| 9 | Ring opening polym- erization of D,L-lactide on magnetite nanoparticles显示文摘 | Tian Jing Feng Yakai Xu Yongshen | 2006 | Macromolecular Research2006，14，2： | 1 |
| 10 | Progress in depsipep- tide-based biomaterials显示文摘 | Feng Yakai Lu Jian Behl M | 2010 | Macromolecular Bioscience2010，10，9： | 1 |
| 11 | Biodegradable polydepsipep- tides显示文摘 | Feng Yakai Guo Jintang | 2009 | International Journal of Molecular Sciences2009，10，58： | 1 |
| 12 | Biological evaluation of degradable, stimuli-sensitive multiblock copolymers having poIydepsipeptide- and poly(e-caprolactone) seg- ments in vitro 显示文摘 | Battig A Hiebl B Feng Yakai | 2011 | Clinical Hemorheology and Microcircu- lation2011，48，13： | 1 |
| 13 | Formation of a bicontinuous structure membrane of polyvinylidene fluoride in diphenyl carbonate diluent via thermally induced phase separation 显示文摘 | Lin Yakai Tang Yuanhui Ma Hengyu | 2009 | Journal of Applied Polymer Science2009，114，： | 1 |
| 14 | New biomaterial: Triblock copolymers of poly -poly (ethylene oxide) 显示文摘 | Feng Yakai Klee D H6cker H | 1999 | Materialwissenschafi und Werkstofftechnik1999，30，12： | 1 |
| 15 | Biodegradable,amorphous copolyester-urethane networks having shape-memory properties显示文摘 | Armin Alteheld Yakai Feng Steffen Kelch | 2005 | Angewandte Chemie International Editon2005，44，8： | 1 |
| 16 | The ef- fectiveness of position limits: Evidence from the foreign exchange futures markets显示文摘 | Chang Yakai Chen Yulun Chou R K | 2013 | Journal of Banking Finance2013，37，11： | 1 |
| 17 | Synthesis and characterization of poly(carbonate urethane)networks with shape-memory properties 显示文摘 | Feng Yakai Xue Yan Guo Jintang | 2009 | Journal of Applied Polymer Science2009，112，1： | 1 |
| 18 | Altered cellular responses by varying expression of a ribosomal protein gene: sequential coordination of enhancement and suppression of ribosomomal protein S3a gene induces apoptosis显示文摘 | Naora H Yakai I Adachi M | 1998 | J Cell Biol1998，141，3： | 1 |
| 19 | Surface modification of biomaterials by photochemical immobilization and photograft polymerization to improve hemocompatibility显示文摘Thrombus formation and blood coagulation are serious problems associated with blood contacting products,such as catheters,vascular grafts,artificial hearts,and heart valves.Recent progresses and strategies to improve the hemocompatibility of biomaterials by surface modification using photochemical immobilization and photograft polymerization are reviewed in this paper.Three approaches to modify biomaterial surfaces for improving the hemocompatibility,i.e.,bioinert surfaces,immobilization of anticoagulative substances and biomimetic surfaces,are introduced.The biomimetic amphiphilic phosphorylcholine and Arg-Gly-Asp(RGD)sequence are the most effective and most often employed biomolecules and peptide sequence for improving hemocompatibility of material surfaces.The RGD sequence can enhance adhesion and growth of endothelial cells(ECs)on material surfaces and increase the retention of ECs under flow shear stress conditions.This surface modification is a promising strategy for biomaterials especially for cardiovascular grafts and functional tissue engineered blood vessels. | Yakai FENG Haiyang ZHAO Li ZHANG Jintang GUO | 2010 | Frontiers of Chemical Science and Engineering2010，4，3： | 1 |
| 20 | Biodegradable, Amorphous Copolyester-Urethane Networks Having Shape-Memory Properties显示文摘 | Armin A|teheld Yakai Feng Steffen Kelch | 2005 | Angewandte Chemie International Editon2005，44，8： | 1 |
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