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Different accretion and diagenetic patterns within the fabrics of the Permian–Triassic boundary microbialites on the Leye isolated carbonate platform, South China Block

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Journal of Palaeogeography 2021年第2期10卷 197-208页

作者： xi-yang zhang Yue Li Guan Wang Hong-Qiang yang Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyInnovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou 510301Guangdong ProvinceChina State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008Jiangsu ProvinceChina.

A comprehensive study on the accretion and diagenesis of the Permian–Triassic boundary microbialites is conducive to a better understanding of the ecological community after the end-Permian mass extinction. Here we studied the special microbialite sequences at the Tianba section of Leye isolated carbonate platform, South China Block. The microbialites are shown as small columnar stromatolites, stromatolitic thrombolites, spotted thrombolites,and domical digitate thrombolites in an ascending order. Thin section analyses, coupled with cathodoluminescence photos and oxygen isotopic data, reveal that all types of microbially-mediated laminae/clots are partly *** of the Polybessurus-like fossils commonly occur in the recrystallized fabrics of stromatolitic laminae. However,the Polybessurus-like fossils are rare in quantity and generally fragmentary and structureless in stromatolitic clots and spotted clots. Such taphonomic features are likely interpreted as the early decomposition by heterotrophic bacteria in an oxygen-depleted microenvironment caused by rapid accumulations of organic matter in the calm *** enrichments of ~(13)C in the laminae of stromatolite and in the clots of stromatolitic thrombolite and spotted thrombolite than in adjacent interstitial matrixes signify the photosynthesis-dominated isotopic fractionation during the growth of microbial communities. Rare calcimicrobial structures but many calcite crystal fans were found in the ~(13)C-depleted digitate clots. These phenomena indicate that seawater on the carbonate platform was ~(12)C-enriched and supersaturated, accelerating carbonate precipitations and decompositions of organic matter within the microbial community. Different preservations of the Polybessurus-like fossil revealed the complicated microbiallydominated sedimentation and post-depositional diagenesis in the abnormal seawater after the catastrophe.

关键词： Microbialite Calcimicrobe Carbon isotope Diagenesis End-Permian mass extinction South China Block

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NUMERICAL RESEARCH ON WATER GUIDE BEARING OF HYDRO-GENERATOR UNIT USING FINITE VOLUME METHOD

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Journal of Hydrodynamics 2007年第5期19卷 635-642页

作者： PENG Yu-cheng CHEN xi-yang zhang Ke-wei HOU Guo-xiang School of Energy and Power. Engineering Huazhong University of Science and Technology Wuhan 430074 China School of Traffic Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

With the consideration of the geometry of tilting pad journal bearing, a new form of the Reynolds equation was derived in this article. The film thickness, the squeeze motion of the journal and the rotation motion of the pad were explicitly contained in the equation. Based on this equation, together with the equilibrium equation of pad pivot, the water guide bearing used in the Gezhouba 10 F hydro-generator unit was numerically researched. The new Reynolds equation for the lubricating film was solved using Finite Volume （FV） discretization, Successive Over-Relaxation （SOR） iteration method and C＋＋ code are included. According to the numerical solution, and the stability of the film and the influences of the film thickness, the journal squeeze effect and the pad rotation effect on film force were discussed. The results indicate that the squeeze effect can not be neglected, although the rotation effect is negligible for both low-speed and high-speed bearings, so the computing time could be greatly reduced.

关键词： hydro-generator unit Reynolds equation,tilting pad journal bearing Finite Volume (FV) method

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Ammonia Volatilization Losses from Urea Applied to Wheat on a Paddy Soil in Taihu Region, China

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Pedosphere 2005年第1期15卷 59-65页

作者： FANxiao-Hui SONGYong-Sheng LINDe-xi yangLin-zhang ZHOUJian-Min InstituteofSoilScience ChineseAcademyofSciencesNanjing210008China

Ammonia volatilization losses from urea applied as a basal fertilizer and a top dressing at tillering stage in a wheat field of Taihu Region, China, were measured with a micrometeorological technique. Urea as fertilizer was surface broadcast at 81 (low N) and 135 (high N) kg N ha-1 as basal at the 3-leaf stage of the wheat seedling on December 2002, and 54 (low N) and 90 (high N) kg N ha-1 as top dressing on February 2003. Ammonia volatilization losses occurred mainly in the first week after applying N fert…

关键词： ammonia volatilization urea wheat

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可多次使用的液晶型类玻璃高分子

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高分子学报 2017年第10期27卷 1662-1667页

作者：杨洋张锡奇危岩吉岩生命有机磷化学及化学生物学教育部重点实验室清华大学化学系北京100084 中国科学院仿生材料与界面科学重点实验室中国科学院理化技术研究所北京100190

通过高温下酯交换反应的进行,含酯键的液晶型类玻璃高分子(liquid crystalline vitrimer),能够通过简单拉伸进行取向,获得随温度变化可逆伸缩的智能材料.在目前已报道的此类主链型高分子中,酯交换剧烈发生需要的临界温度(Tv),与液晶弹... 详细信息

通过高温下酯交换反应的进行,含酯键的液晶型类玻璃高分子(liquid crystalline vitrimer),能够通过简单拉伸进行取向,获得随温度变化可逆伸缩的智能材料.在目前已报道的此类主链型高分子中,酯交换剧烈发生需要的临界温度(Tv),与液晶弹性体发生可逆形变的温度(Ti,即液晶相-各向同性相转变温度)相隔较近,导致材料的使用温度范围比较窄,而且多次升降温后,取向及可逆形变会消失.为解决此问题,本文在原来体系的基础上,通过共聚合另外一种液晶基元,有效地降低了Ti,从而拓宽Ti与Tv之间的距离.这不仅使材料的使用次数明显增加,还能延长此类液晶弹性体的使用期限.

关键词：液晶弹性体类玻璃高分子液晶态转变温度(Ti) 可逆驱动

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Variation of Ko-Values of Shanghai Soft Soils

Variation of Ko-Values of Shanghai Soft Soils

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作者： Dao-Duo Wei xi-zhang yang Tongii University,Shanghai

In this paper is reported laboratory tests for K-coefficient of Shanghai soils,using the autographic K-meter developed by the writers and re- ported in an earlier paper,including K-values under different conditions of loading,drainage ect,and analyses of their variation and distribution pattern. Thus have been esbablished the distribution patteras for K-values of typical soft layers of Shanghai region,relationship between K and stress history,and also empirical formulas for K-values as function of degres of consolidation, these are preliminary but may be meaningful.

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支气管动脉化疗栓塞术导致脊髓损伤的原因与对策

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中国介入影像与治疗学 2008年第6期5卷 429-432页

作者：杨熙章杨利陈自谦杨永岩福州总医院医学影像科福建福州350025

目的探讨肺部病变支气管动脉介入治疗致脊髓损伤的因素及对策。方法常规组采用支气管动脉灌注化疗或加栓塞术治疗肺癌,采用支气管动脉明胶海绵颗粒栓塞术治疗大咯血;试验组术前加行利多卡因脊髓功能诱发试验。结果常规组583例中,肺癌373... 详细信息

目的探讨肺部病变支气管动脉介入治疗致脊髓损伤的因素及对策。方法常规组采用支气管动脉灌注化疗或加栓塞术治疗肺癌,采用支气管动脉明胶海绵颗粒栓塞术治疗大咯血;试验组术前加行利多卡因脊髓功能诱发试验。结果常规组583例中,肺癌373例,发生脊髓损伤11例;大咯血210例(其中支气管扩张150例、肺结核44例、肺血管畸形12例和肺隔离症4例),未发生脊髓损伤,两者相比差异显著(P<0.05)。试验组403例(肺癌318例和大咯血85例)中,脊髓功能诱发试验阳性58例,经微导管超选择治疗无一例发生脊髓损伤。结论支气管动脉介入治疗中,肺癌较易并发脊髓损伤,可能主要与高浓度的毒性药物损伤有关,而颗粒性栓塞影响较小。术前应用利多卡因脊髓功能诱发试验判断支气管动脉是否与脊髓根动脉共干,能有效避免脊髓动脉损伤。

关键词：肺肿瘤支气管动脉栓塞治疗性脊髓损伤

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肝癌介入治疗现状与进展

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介入放射学杂志 2008年第3期17卷 223-227页

作者：陈自谦杨利杨熙章杨永岩福州南京军区福州总医院医学影像科 350025

本文就肝癌介入治疗的方法、相关基础研究及仍然存在的问题对近几年的文献进行了复习。各种介入治疗方法(TACE、热灌注化疗、热栓塞、中药栓塞剂、经皮注射无水乙醇、射频消融、经皮微波凝固、氩氦刀冷冻)均存在不足,双重化疗栓塞术,TAC... 详细信息

本文就肝癌介入治疗的方法、相关基础研究及仍然存在的问题对近几年的文献进行了复习。各种介入治疗方法(TACE、热灌注化疗、热栓塞、中药栓塞剂、经皮注射无水乙醇、射频消融、经皮微波凝固、氩氦刀冷冻)均存在不足,双重化疗栓塞术,TACE联合消融,TACE联合基因治疗等综合治疗手段的应用使疗效进一步提高;TACE后肝癌残存灶生物学行为影响方面的研究仅开始涉及,诸多问题尚待解决。以p53抑癌基因治疗、溶瘤病毒治疗为代表的基因治疗、抗血管生成等新的治疗方法的出现,使肝癌的介入治疗进入了新阶段;术中及围手术期处理关系着肝癌介入疗效及并发症防治,有待进一步规范。

关键词：肝癌介入治疗现状进展

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动脉栓塞术治疗失功能移植肾

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介入放射学杂志 2008年第7期17卷 484-485页

作者：杨熙章杨利陈自谦杨永岩南京军区福州总医院医学影像科福州350025

目的探讨失功能移植肾介入废除术的临床应用价值。方法15例移植肾失功能患者接受肾动脉栓塞术,观察其术后效果,随访6个月～4年。结果11例血压降至正常,3例降压药减量,1例无效;12例患者术后无尿,3例尿量明显减少,蛋白尿明显减轻;5例淋巴... 详细信息

目的探讨失功能移植肾介入废除术的临床应用价值。方法15例移植肾失功能患者接受肾动脉栓塞术,观察其术后效果,随访6个月～4年。结果11例血压降至正常,3例降压药减量,1例无效;12例患者术后无尿,3例尿量明显减少,蛋白尿明显减轻;5例淋巴细胞群体反应抗体阳性(PRA>20%),其中3例PRA阳性者于术后3周左右转阴;移植肾不同程度萎缩。其中4例分别于术后3～6个月再次肾移植成功,随访1～3年,目前3例情况良好。结论介入栓塞术处理失功能移植肾安全有效,明显减轻失功能肾引起的相关临床症状,为再次肾移植创造条件。

关键词：肾移植造影动脉栓塞术

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Dielectric-ion-conductive ZnNb2O6 layer enabling rapid desolvation and diffusion for dendrite-free Zn metal batteries

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Journal of Energy Chemistry 2025年第1期100卷 693-701页

作者： Haifeng yang Jian Wang Panpan zhang xiaomin Cheng Qinghua Guan Jing Dong Bixian Chen Lujie Jia Jing zhang Yongzheng zhang Yunjian Liu Hongzhen Lin School of Materials Science and Engineering Jiangsu University i-Lab & CAS Key Laboratory of Nanophotonic Materials and Devices Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of Sciences Helmholtz Institute Ulm (HIU) Karlsruhe Institute of Technology (KIT) School of Materials Science and Engineering Xi'an University of Technology State Key Laboratory of Chemical Engineering East China University of Science and Technology

Rechargeable aqueous zinc-metal batteries （AZMBs） are promising candidates for large-scale energy storage systems due to their low cost and high ***,their performance and sustainability are significantly hindered by the sluggish desolvation kinetics at the electrode/electrolyte interface and the corresponding hydrogen evolution reaction where active water molecules tightly participate in the Zn（H2O）62+solvation ***,learnt from self-generated solid electrolyte interphase （SEI） in anodes,the dielectric but ion-conductive zinc niobate nanoparticles artificial layer is constructed on metallic Zn surface （ZNB@Zn）,acting as a rapid desolvation *** zincophilic and dielectric-conductive properties of ZNB layer accelerate interfacial desolvation/diffusion and suppress surface corrosion or dendrite formation,achieving uniform Zn plating/stripping behavior,as confirmed by electronic/optical microscopies and interface spectroscopical measurements together with theoretical ***,the as-prepared ZNB@Zn electrode exhibits excellent cycling stability of over 2000 h and robust reversibility （99.54%） even under high current density and depth of discharge ***,the assembled ZNB@Zn-based full cell displays high capacity-retention rate of 80.21%after 3000 cycles at 5 A g-1and outstanding rate performance up to 10 A *** large-areal pouch cell is stabilized for hundreds of cycles,highlighting the bright prospects of the dielectric but ion-conductive layer in further application of AZMBs.

关键词： Zn metal battery Dielectric artificial layer Rapid ion diffusion Zincophilic diffusion Active water inhibition

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Müller cells are activated in response to retinal outer nuclear layer degeneration in rats subjected to simulated weightlessness conditions

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Neural Regeneration Research 2025年第7期20卷 2116-2128页

作者： Yuxue Mu Ning zhang Dongyu Wei Guoqing yang Lilingxuan Yao xinyue Xu yang Li Junhui Xue Zuoming zhang Tao Chen Aerospace Clinical Medical Center School of Aerospace MedicineAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Aviation Medicine Xijing HospitalAir Force Medical UniversityXi’anShaanxi ProvinceChina Department of Emergency Medicine Wuhan No.1 HospitalWuhanHubei ProvinceChina Third Regiment School of Basic MedicineAir Force Medical UniversityXi’anShaanxi ProvinceChina Fourth Regiment School of Basic MedicineAir Force Medical UniversityXi’anShaanxi ProvinceChina

A microgravity environment has been shown to cause ocular damage and affect visual acuity,but the underlying mechanisms remain ***,we established an animal model of weightlessness via tail suspension to examine the pathological changes and molecular mechanisms of retinal damage under *** 4 weeks of tail suspension,there were no notable alterations in retinal function and morphology,while after 8 weeks of tail suspension,significant reductions in retinal function were observed,and the outer nuclear layer was thinner,with abundant apoptotic *** investigate the mechanism underlying the degenerative changes that occurred in the outer nuclear layer of the retina,proteomics was used to analyze differentially expressed proteins in rat retinas after 8 weeks of tail *** results showed that the expression levels of fibroblast growth factor 2(also known as basic fibroblast growth factor)and glial fibrillary acidic protein,which are closely related to Müller cell activation,were significantly *** addition,Müller cell regeneration and Müller cell gliosis were observed after 4 and 8 weeks,respectively,of simulated *** findings indicate that Müller cells play an important regulatory role in retinal outer nuclear layer degeneration during weightlessness.

关键词： glial fibrous acidic protein gliosis Müller cells nerve growth factor neural differentiation neurodegeneration proteomic retinal degeneration retinal outer nuclear layer simulated weightlessness

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