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| 1 | Lower limits of evaluation parameters for the lower Paleozoic Longmaxi shale gas in southern Sichuan Province显示文摘Here we present six key parameters that have been applied to evaluate the Silurian Longmaxi shale gas accumulations of southern Sichuan Province.These parameters include richness of organic matter,single layer shale thickness,burial depth of the shale,maturity,shale properties,and brittle mineral content.In combination with drilling data,the lower limits of these six parameters for marine shale gas have been evaluated and the following conclusions are drawn:(1)Organic carbon recovery, gas content inversion,and production tests have been applied for the first time to measure the lower limit of TOC,which is determined to be 1.0%.(2)Based on the hydrocarbon generation and expulsion theory for source rocks and the characteristics of Longmaxi shale,the lower limit of the single-layer thickness is estimated to be 30 m,of which a thickness of at least 15 m should contain high-quality shale.(3)Based on the correlation of TOC and porosity,the lower limit of gas-filled porosity is 1.2%.(4)Other parameters,such as maturity,burial depth,and brittle mineral content have also been studied with regard to the geologic conditions of southern Sichuan.Based on the study results,an evaluation index system has been established for highly evolved marine shale gas,and the system has been applied successfully to geologically screened shale gas occurrences in southern Sichuan Province. | LI YanJun LIU Huan ZHANG LieHui LU ZongGang LI QiRong HUANG YongBin | 2013 | Science China Earth Sciences2013，56，5： | 20 |
| 2 | Inconsistency of changes in uniaxial compressive strength and P-wave velocity of sandstone after temperature treatments显示文摘It is generally accepted that the uniaxial compressive strength(UCS)and P-wave velocity of rocks tend to decrease simultaneously with increasing temperature.However,based on a great number of statistical data and systematic analysis of the microstructure variation of rocks with temperature rising and corresponding propagation mechanism of elastic wave,the results show that(1)There are three different trends for the changes of UCS and P-wave velocity of sandstone when heated from room temperature(20C or 25C)to 800C:(i)Both the UCS and P-wave velocity decrease simultaneously;(ii)The UCS increases initially and then decreases,while the P-wave velocity decreases continuously;and(iii)The UCS increases initially and then fluctuates,while the P-wave velocity continuously decreases.(2)The UCS changes at room temperaturee400C,400Ce600C,and 600Ce800C are mainly attributed to the discrepancy of microstructure characteristics and quartz content,the transformation plasticity of clay minerals,and the balance between the thermal cementation and thermal damage,respectively.(3)The inconsistency in the trends of UCS and P-wave velocity changes is caused by the change of quartz content,phase transition of water and certain minerals. | Jinyuan Zhang Yanjun Shen Gengshe Yang Huan Zhang Yongzhi Wang Xin Hou Qiang Sun Guoyu Li | 2021 | Journal of Rock Mechanics and Geotechnical Engineering2021，13，1： | 5 |
| 3 | Sandstone-concrete interface transition zone (ITZ) damage and debonding micromechanisms under freeze-thaw显示文摘The sufficient bond between concrete and rock is an important prerequisite to ensure the effect of shotcrete support. However, in cold regions engineering protection system, the bond condition of rock and concrete surface is easily affected by freeze-thaw cycles, resulting in interface damage, debonding and even supporting failure. Understanding the micromechanisms of the damage and debonding of the rock-concrete interface is essential for improving the interface protection.Therefore, the micromorphology, micromechanical properties, and microdebonding evolution of the sandstone-concrete interface transition zone(ITZ) under varying freeze-thaw cycles(0, 5, 10, 15, 20) were studied using scanning electron microscope, stereoscopic microscope, and nano-indentation. Furthermore, the distribution range and evolution process of ITZ affected by freeze-thaw cycles were defined. Major findings of this study are as follows:(1) The microdamage evolution law of the ITZ under increasing freeze-thaw cycles is clarified, and the relationship between the number of cracks in the ITZ and freeze-thaw cycles is established;(2) As the number of freeze-thaw cycles increases, the ITZ's micromechanical strength decreases, and its development width tends to increase;(3) The damage and debonding evolution mechanisms of sandstone-concrete ITZ under freeze-thaw cycles is revealed, and its micromechanical evolution model induced by freeze-thaw cycles is proposed. | YanJun Shen Huan Zhang JinYuan Zhang HongWei Yang Xu Wang Jia Pan | 2021 | Research in Cold and Arid Regions2021，13，2： | 3 |
| 4 | Changes in flavor compounds of dry-cured Chinese Jinhua ham during processing显示文摘 | YANJUN HUAN GUANGHONG ZHOU GAIMING ZHAO | 2005 | Meat Science2005，，71： | 1 |
| 5 | Changes in flavor compounds of dry-cured Chinese Jinhua ham during processing显示文摘 | Huan Yanjun Zhou Guanghong Zhao Gaiming | 2005 | Meat Science2005，71，： | 1 |
| 6 | Changes in flavor compounds of dry-cured Chinese Jinhua ham during processing显示文摘 | HUAN Yanjun ZHOU Guanghong ZHAO Gaiming | 2005 | Meat Science2005，71，2： | 1 |
| 7 | Changes in flavor compounds of dry-cured Chinese Jinhua ham during processing显示文摘 | HUAN Yanjun ZHOU Guanghong ZHAO Gaiming | | 0，，02： | 1 |
| 8 | Effect of temperature control and high humidity on the preservation of JUFENG grapes 显示文摘 | Min Zhang Qian Tao Yanjun Huan | 2002 | Int Agro physics2002，16，： | 1 |
| 9 | Changes in flavor compounds of dry-cured Chinese Jinhua ham during processing显示文摘 | HUAN Yanjun ZHOU Guanghong ZHAO Gaiming | 2005 | Meat Sciencer2005，71，2： | 1 |
| 10 | Changes in flavor compounds of dry-cured Chinese Jinhua ham during processing显示文摘 | Yanjun Huan Guanghong Zhou Gaiming Zhao Xinglian Xu Zengqi Peng | 2005 | Meat Science2005，，2： | 1 |
| 11 | Effect of flow field distribution on the synthesis of sub-micron ZSM-5 molecular sieve in a quasi-solid system显示文摘Scale-up synthesis of sub-micron ZSM-5 molecular sieve in a quasi-solid system was investigated. Compared with traditional hydrothermal synthesis, the synthesis in a quasi-solid system has the advantages of high yield, short crystallization time, low energy consumption as well as low emissions. However, the high solid content in the quasi-solid system can cause the mass and heat transfer problems and make scalable production difficult. In order to solve the problem, we have developed a method for the optimization of the mass and heat transfer. By this method one can vary the flow field in the reactor by changing the stirrer speed. Scale-up synthesis of the sub-micron ZSM-5 molecular sieve in a quasi-solid system was carried out in a 5 L reactor with double propeller-type agitators. The process was investigated with product characterization using X-ray diffraction (XRD) and scanning electron microscopy (SEM) and the flow field information was collected using laser Doppler velocimetry (LDV). The results showed that the flow field patterns can be tuned by using different stirrer speeds, the morphology and size of as-synthesized of ZSM-5 can be effectively controlled. | Xia Zhi Hu Si Zhang Huan Li Xiaofeng Gong Yanjun Dou Tao | 2013 | Petroleum Science2013，10，1： | 0 |
| 12 | Comparison in phytoplankton diversity-productivity-community stability between river-type reservoir and lake-type reservoir显示文摘Relationship between biodiversity and ecosystem function is one of the core issues in ecological research.Phytoplankton,as the main producer of aquatic ecosystem,its diversity,productivity,and community stability are of great signifi cance to reveal ecosystem function.There are signifi cant diff erences in hydrodynamics,water retention time,and phytoplankton community structure between river-type reservoir and newly built lake-type reservoir.The comparative analysis of phytoplankton community stability between the two types of reservoir has not been reported.Jiuquwan Reservoir(river-type)and Taihu Reservoir(lake-type),the two reservoirs in the Dongjiang River source area of Zhujiang(Pearl)River Basin,were selected for comparison in terms of multi-year operation vs.new impoundment,river-type vs.lake-type,and shallow water vs.sub-deep water reservoirs.Samples were collected in dry season(December 2019),normal season(March 2020),and wet season(August 2020),on which the phytoplankton diversity and productivity of the two reservoirs,and the relationship and diff erence of community stability were examined.Results show that(1)the number of phytoplankton species in Jiuquwan Reservoir decreased comparing that before algal bloom and the restoration treatment,while that in Taihu Reservoir increased compared with that before the impoundment of the reservoir.There was no signifi cant diff erence in functional groups and species number between the two reservoirs(P>0.05);(2)the biological stability,diversity,productivity,and resource utilization effi ciency of newly built lake-type reservoir were higher than those of multi-year river-type reservoir.In addition,the utilization effi ciency of phytoplankton resources was the highest in wet season in both reservoirs.The increases in biodiversity,richness,and evenness promoted the stability of the community,while increases in productivity and resource utilization effi ciency weakened the stability of the community;(3)community stability was aff ected by both biotic and abiotic factors,and hydrodynamic index was the main factor.This study is helpful to understand the relationship and diff erences in phytoplankton diversity,productivity and community stability in diff erent types of reservoirs,and provides a guidance for maintaining the stability of reservoir water ecosystem and protecting the biodiversity.The relationships between phytoplankton diversity,productivity,and community stability will be investigated in depth,for which a long-term observation will be conducted on the impact of environmental factors and diversity on the local biostability in diff erent types of reservoirs. | Qiong WU Qiuhua LI Huan LUO Qian CHEN Huaxiang CHEN Yanjun DONG Shenghua LI | 2022 | Journal of Oceanology and Limnology2022，40，4： | 0 |
| 13 | VdMKK1-mediated cell wall integrity is essential for virulence in vascular wilt pathogen Verticillium dahliae显示文摘The fungal cell wall is the front-line in host-pathogen interactions,which is an essential dynamic structure maintaining cellular integrity and protecting the fungal cell from external aggressors,such as environmental stress,or during host infection(Geoghegan et al.,2017;Gow et al.,2017).Its synthesizing and remodeling/reinforcement are controlled by the cell wall integrity(CWl)pathway(Riquelme et al.,2018).The CWI pathway is a conserved signalling transduction cascade and is well characterized in the model yeast Saccharomyces cerevisiae.In phytopathogenic fungi,it exhibits more speciesspecific functions to suit their distinct invasion strategies.For many appressorium-forming plant pathogens such as the rice blast fungus Magnaporthe oryzae and Colletotrichum gloeosporioide,CWl pathway regulates the development and functioning of appressorium,which is required for pathogenicity(Jeon et al.,2008;Yin et al.,2016,2020;Fang et al.,2018). | Jiaqi Li Juan Tian Huan Cao Mengli Pu Xiaxia Zhang Yanjun Yu Zhi Wang Zhaosheng Kong | 2023 | Journal of Genetics and Genomics2023，50，8： | 0 |
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