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New Records of Petrified Wood from the Middle Jurassic in Ar Horqin Banner,Inner Mongolia

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Acta Geologica Sinica(English Edition) 2021年第2期95卷 684-686页

作者： zhang Yujin TIAN Ning LIANG Fei zhang Chao LI Wei LOU Renxing MA yongfei DU Jiyu Shenyang Center of the Geological Survey Chinese Geological SurveyShenyang 110034China College of Palaeontology Shenyang Normal UniversityShenyang 110034China Key Lab of the Evolution of Past Life in NE Asia Ministry of Natural ResourcesShenyang 110034China College of Earth Sciences Jilin UniversityChangchun 130061China

Objective Petrified wood,as an important component of plant fossils,plays a significant role in understanding the floral composition and terrestrial palaeoclimates of the geological *** abundant petrified woods have been found from the Mesozoic deposits in the Great Xing’an Range,NE China,it was rare for systematic investigations to be carried out for these fossil wood remains.

关键词： Jurassic Middle abundant

Factors controlling tight oil and gas reservoir development in the Jurassic siliciclastic-carbonate rocks in Sichuan Basin, China

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Energy Geoscience 2022年第4期3卷 453-464页

作者： Runcheng Xie Ziwei Luo Mengyuan zhang yongfei Wang Jun Chen Miao Zhu School of Energy Resources Chengdu University of TechnologyChengduSichuan610059China Southwest Oil and Gas Company SINOPECChengduSichuan610041China

The prediction of“sweet spot”of multi-lithology composite tight oil and gas reservoirs within mixed siliciclastic-carbonate sequences is a hot topic in oil and gas *** are mixed lacustrine carbonate-siliciclastic rocks in the Da'anzhai Member of Ziliujing Formation in the Eastern Slope of western Sichuan *** reservoir lithology is complex,and the main factors controlling the development of high-quality reservoirs are yet to be *** on a large number of drilling,core and thin section observation,well log and seismic data,this paper systematically studies the characteristics and factors controlling the development of the mixed siliciclastic-carbonate *** results show that the reservoir is composed primarily of coquina,sandstone,breccia and shale in lithology,and its development is mainly controlled by sedimentary microfacies,diagenesis,tectonism(fracturing)and paleogeomorphology during the sedimentary *** effective fractures in reservoirs of the low-energy shell shoal facies are well developed with relatively good physical *** the change of sedimentary microfacies from low-energy shoal to high-energy shoal to arenaceous shoal,the hy-drocarbon production capacity worsens step by ***,such as dissolution and fracturing,has a certain effect on reservoir physical *** palaeogeomorphic highs and slopes had well-developed fractures during the sedimentary period which are conducive to constructive dissolution,and thus they are favorable zones for reservoir *** development of structural fractures further amplifies the influence of dissolution;thus the fracture zones are also favorable for the devel-opment of high-quality *** favorable sedimentary facies zone and fracture development degree serve as the core factors for the formation of high-quality mixed *** muddy limestone with certain dissolved pores and structural fractures deposited under the low-energy shel

关键词： Mixed siliciclastic-carbonate reservoir Controlling factor Sedimentary facies Sichuan Basin China

Soft X-ray in-line holographic experiment

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Chinese Science Bulletin 1998年第8期43卷 641-643页

作者： Shaoguang Yang Xingshu Xie Chengzhi Jia yongfei Zhao Shiping Jiang Yuxuan zhang Xiaobin Shan Xinyi zhang Univ Sci & Technol China Ctr Fundamental Phys Hefei 230026 Peoples R China Univ Sci & Technol China Natl Synchrotron Radiat Lab Hefei 230029 Peoples R China

Water window" soft X-ray has some advantages in the microimaging of biological specimens. Soft X-ray holography can give us three-dimensional images of biological cells in their natural condition. Quasi-monochromatic soft X-ray from the polymonochromatic synchrotron radiation is obtained by a zone plate-pinhole linear monochromator at National Synchrotron Radiation Laboratory (NSRL) at Hefei. The pinhole is used to increase the temporal coherence of the soft X-ray, and also to increase the spatial coherence of it. An in-line holographic experiment has been finished with soft X-ray of main wavelength 4.5 nm and pinhole of diameter 0.03 mm. The magnified hologram is reconstructed with He-Ne laser. A smaller pinhole is wanted to be used to improve the coherence of the soft X-ray so as to improve the quality of the hologram.

关键词： soft X-ray microscopy in-line hologram.

YP2区块水平井网井间示踪剂产出影响因素分析及解释模型

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云南化工 2023年第10期50卷 132-137页

作者：李育马焕焕张永飞张金元杨文博李卫东韩龙飞吕栋延长油田股份有限公司勘探开发技术研究中心工艺技术研究所陕西延安716001

针对水平井网井间示踪剂产出影响因素不明确以及井间窜流情况难以明确表征等难题,以延长油田YP2区块区块为例,采用数值模拟手段,分析了窜流通道突进系数、窜流通道厚度等10个因素对产出示踪剂的影响,结果表明,储层压力与示踪剂注入初始... 详细信息

针对水平井网井间示踪剂产出影响因素不明确以及井间窜流情况难以明确表征等难题,以延长油田YP2区块区块为例,采用数值模拟手段,分析了窜流通道突进系数、窜流通道厚度等10个因素对产出示踪剂的影响,结果表明,储层压力与示踪剂注入初始浓度对示踪剂产出浓度曲线的形态完全不影响,窜流通道突进系数、窜流通道厚度、储层渗透率、储层孔隙度、后期注水速度,以及窜流通道长度等参数影响较大。基于分析结果,采用B-P神经网络算法建立了井间示踪剂的解释模型,验证了该模型具有较高的预测精度。

关键词：井间示踪剂产出影响因素窜流通道解释模型

Early Holocene High Magnitude Debris Flow Events and Environmental Change as Illustrated by the Moxi Platform, Hengduan Mountains, SW China

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Journal of Mountain Science 2006年第2期3卷 125-130页

作者： zhang Junyan CHENG Genwei LI yongfei Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China Graduate University of Chinese Academy of Sciences Beijing 100049 China Department of Biology Acadia University Wolfville Nova Scotia Canada B4P 2R6 Department of Geography Shangrao Normal College Shangrao 334001 Jiangxi China

Thick debris flow deposits in the Hengduan Mountains of southwestern China record landscape instability at the close of the last glaciation and in the early Holocene. The deposits, ranging in thickness from 100 to 200 m, are common and in high magnitude in the valleys of this region. They are products of large debris flows induced by glacier and enabled by the presence of large amount of glacial debris on the landscape. The carbon 14 dating from Moxi Platform indicates that a period of catastrophic debris flows occurred at c. 7 kyr B.P., and was concurrent with other glacial-fluvial fans and terraces which tied to regional climatic oscillations elsewhere in the Himalaya. The comparable events suggest a strong climatic control on earth surface processes for the dynamics, magnitude, and frequency in this region.

关键词： Debris flows environment change Holocene Hengduan Mountains China

Sheep manure application increases soil exchangeable base cations in a semi-arid steppe of Inner Mongolia

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Journal of Arid Land 2015年第3期7卷 361-369页

作者： YuGe zhang Shan YANG MingMing FU JiangPing CAI YongYong zhang RuZhen WANG ZhuWen XU yongfei BAI Yong JIANG State Key Laboratory of Forest and Soil Ecology Institute of Applied EcologyChinese Academy of Sciences Key Laboratory of Regional Environment and Eco-remediation College of EnvironmentShenyang University University of Chinese Academy of Sciences State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of Sciences

The long-term productivity of a soil is greatly influenced by cation exchange capacity（CEC）.Moreover,interactions between dominant base cations and other nutrients are important for the health and stability of grassland *** exchangeable base cations and cation ratios were examined in a 11-year experiment with sheep manure application rates 0–1,500 g/（m2？a） in a semi-arid steppe in Inner Mongolia of China,aiming to clarify the relationships of base cations with soil p H,buffer capacity and *** showed that CEC and contents of exchangeable calcium（Ca2＋）,magnesium（Mg2＋）,potassium（K＋） and sodium（Na＋） were significantly increased,and Ca2＋ saturation tended to decrease,while K＋ saturation tended to increase with the increases of sheep manure application *** Ca2＋/Mg2＋ and Ca2＋/K＋ ratios decreased,while Mg2＋,K＋ and Na＋ saturations increased with increasing manure application *** base cations and CEC were significantly and positively correlated with soil organic carbon（SOC） and soil p *** increases of SOC and soil p H would be the dominant factors that contribute to the increase of cations in *** a comparison with the initial soil p H before the experiment,we deduced that sheep manure application could partly buffer soil p H decrease potentially induced by atmospheric deposition of nitrogen and *** results indicate that sheep manure application is beneficial to the maintenance of base cations and the buffering of soil acidification,and therefore can improve soil fertility in the semi-arid steppes of northeastern China.

关键词： base cation sheep manure soil p H soil fertility buffer capacity grassland conservation

A Geochemical Study of an REE-rich Carbonatite Dyke at Bayan Obo,Inner Mongolia,Northern China

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Acta Geologica Sinica(English Edition) 2000年第3期74卷 605-612页

作者： YANG Xueming ZHENG yongfei YANG Xiaoyong zhang Peishan M.J.LE BAS Department of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China School of Ocean and Earth Science University of SouthamptonSO14 3ZHU.K.

An REE-rich carbonatite dyke was found in Dulahala, close to the Bayan Obo superlarge REE-Nb-Fe mineral deposit in Inner Mongolia, northern China. The REE content in the dyke varies greatly, from 1% up to 20% (wt), which might constitute rich REE ores. Light REEs in the carbonatite are enriched and highly fractionated relative to heavy REEs and there is no Eu anomaly. The REE and trace element distribution patterns of the carbonatite are identical to those of fine-grained dolomite marble which is the host rock of the Bayan Obo REE-Nb-Fe superlarge mineral deposit. This indicates a petrogenetic linkage between the REE-rich carbonatite and the mineralizations in this region.

关键词： rare earth elements(REE) carbonatite Bayan Obo

Ginkgo biloba extract alleviates fatty liver hemorrhagic syndrome in laying hens via reshaping gut microbiota

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Journal of Animal Science and Biotechnology 2024年第1期15卷 277-294页

作者： Xinyue Yang Depeng Li Meihong zhang Yuqing Feng Xiaolu Jin Dan Liu Yuming Guo yongfei Hu State Key Laboratory of Animal Nutrition College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China

Background Ginkgo biloba extract(GBE)is evidenced to be effective in the prevention and alleviation of metabolic disorders,including obesity,diabetes and fatty liver ***,the role of GBE in alleviating fatty liver hemorrhagic syndrome(FLHS)in laying hens and the underlying mechanisms remain to be ***,we investigated the effects of GBE on relieving FLHS with an emphasis on the modulatory role of GBE in chicken gut *** The results showed that GBE treatment ameliorated biochemical blood indicators in high-fat diet(HFD)-induced FLHS laying hen model by decreasing the levels of TG,TC,ALT and *** lipid accumulation and pathological score of liver were also relieved after GBE ***,GBE treatment enhanced the antioxidant activity of liver and serum by increasing GSH,SOD,T-AOC,GSH-PX and reducing MDA,and downregulated the expression of genes related to lipid synthesis(FAS,LXRα,GPAT1,PPARγand Ch REBP1)and inflammatory cytokines(TNF-α,IL-6,TLR4 and NF-κB)in the *** profiling analysis revealed that GBE treatment reshaped the HFD-perturbed gut microbiota,particularly elevated the abundance of Megasphaera in the ***,targeted metabolomic analysis of SCFAs revealed that GBE treatment significantly promoted the production of total SCFAs,acetate and propionate,which were positively correlated with the GBE-enriched gut ***,we confirmed that the GBE-altered gut microbiota was sufficient to alleviate FLHS by fecal microbiota transplantation(FMT).Conclusions We provided evidence that GBE alleviated FLHS in HFD-induced laying hens through reshaping the composition of gut *** findings shed light on mechanism underlying the anti-FLHS efficacy of GBE and lay foundations for future use of GBE as additive to prevent and control FLHS in laying hen industry.

关键词： Antioxidation Fecal microbiota transplantation FLHS Ginkgo biloba extract Inflammation Megasphaera

荧光和羟基修饰聚天冬氨酸的制备与阻垢性能——推荐一个综合化学实验

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大学化学 2024年第1期39卷 294-304页

作者：高利军文日珍王赟郭妍蓓惠永海高天明张永飞岭南师范学院化学化工学院清洁能源材料化学广东普通高校重点实验室广东湛江524048

设计了荧光和羟基修饰聚天冬氨酸的制备、表征和阻垢性能的综合实验。首先合成了水溶性荧光物质和聚琥珀酰亚胺(PSI),然后用该荧光物质和乙醇胺修饰PSI并碱性水解,获得目标阻垢剂。用1H NMR、凝胶渗透色谱和荧光分光光度计表征该阻垢剂... 详细信息

设计了荧光和羟基修饰聚天冬氨酸的制备、表征和阻垢性能的综合实验。首先合成了水溶性荧光物质和聚琥珀酰亚胺(PSI),然后用该荧光物质和乙醇胺修饰PSI并碱性水解,获得目标阻垢剂。用1H NMR、凝胶渗透色谱和荧光分光光度计表征该阻垢剂,并通过静态阻垢试验测试该阻垢剂的阻垢性能。本实验融合了高分子化学、有机化学和分析化学内容,体现了“合成–表征–分析”的科学研究过程,强调了“物质–结构–性能”的科研思维模式,可以培养学生的实验素养和科研能力。

关键词：聚天冬氨酸荧光羟基阻垢综合化学实验