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Variation of soil-plant-atmosphere continuum stable isotope and water source in Qinghai spruce forest of the eastern Qilian Mountains

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Journal of Mountain Science 2023年第2期20卷 355-366页

作者： ZHOU Jun-ju WANG Xue MA Luo LUO Chu-yu TANG Hai-tao GUO Zhao-nan CHEN Jia-wei SHI Su-han SHI Wei WEI Wei ZHANG Dong-xia liu chun-fang College of Geography and Environmental Science Northwest Normal UniversityLanzhou 730070China Key Laboratory of Resource Environment and Sustainable Development of Oasis Lanzhou 730070China Sate Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China

Understanding the hydrogen and oxygen stable isotope composition and characteristics of different water bodies in soil-plant-atmosphere continuum is of significance for revealing regional hydrological processes and water cycle *** this study,we analyzed the stable isotopic composition,relationship and indicative significance of precipitation,soil water(0~100 cm depth)and xylem water of Qinghai spruce(Picea crassifolia)forest in the eastern Qilian Mountains,and explored the circulation process among different water *** results show that the stable isotopes of precipitation vary greatly during the entire observation *** values ofδ2H andδ^(18)O in the precipitation in the warm season are richer than those in the cold season,and the slope and intercept of local meteoric water line(LMWL,δ2H=6.79δ18O+7.13)are both smaller than global meteoric water line(GMWL,δ2H=8.17δ18O+10.56).The stable isotopes of soil water at different depths underwent different degrees of evaporative fractionation,and theδ18O andδ2H of shallow soil water varied greatly,while the deep soil water tended to be *** topsoil(0~10 cm)can respond quickly to precipitation,and the response of the deep soil has a time *** the whole growing season,0~30 cm and 60~100 cm soil water are the main water sources of Qinghai *** water source of Qinghai spruce was from all soil layers in May and September,mainly from the shallow soil layer(0~30 cm)in August and October,and mainly from the deep soil layer(60~100 cm)in June and July.

关键词： Stable hydrogen isotope Stable oxygen isotope Soil-plant-atmosphere continuum SPAC Plant water use IsoSource model

H pylori are associated with chronic cholecystitis

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World Journal of Gastroenterology 2007年第7期13卷 1119-1122页

作者： Dong-Feng Chen Lu Hu, Ping Yi Wei-Wen liu Dian-chun fang Hong Cao Department of Gastroenterology DapingHospitalThird Military Medical University Chongqing 400042China

AIM： To study whether H pylon are associated with chronic cholecystitis. METHODS： The subjects were divided into three groups： H pylori-infected cholecystitis group, H pylorinegative cholecystitis group and control group. Pathologic changes of the gallbladder were observed by optic and electronic microscopes and the levels of interleukin-1, 6 and 8 （IL-1, 6 and 8） were detected by radioimmunoassay. RESULTS： Histological evidence of chronic cholecystitis including degeneration, necrosis, inflammatory cell infiltration, were found in the region where H pylori colonized. Levels of IL-1, 6 and 8 in gallbladder mucosa homogenates were significantly higher in H py/oriinfected cholecystitis group than those in Hpylorinegative cholecystitis group and control group. CONCLUSION： H pylon infection may be related to cholecystitis.

关键词： H pylori Chronic cholecystitis Interleukin Colonization Gallbladder mucosa

H pylori exist in the gallbladder mucosa of patients with chronic cholecystitis

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World Journal of Gastroenterology 2007年第10期13卷 1608-1611页

作者： Dong-Feng Chen Lu Hu Ping Yi Wei-Wen liu Dian-chun fang Hong Cao Department of Gastroenterology Daping HospitalThird Military Medical University Chongqing 400042 China

AIM:To study whether H pylori locate in the gallbladder mucosa of patients with chronic ***:Using Warthy-Starry(W-S)silver stain and immunohistochemistry stain with anti-H pylori antibodies,we screened paraffin specimens in 524 cases of cholecystitis.H pylori urease gene A(HPUA)and H pylori urease gene B(HPUB)were analyzed by polymerase chain reaction(PCR)in the fresh tissue specimens from 81 cases of ***:H pylori-like bacteria were found in 13.55% of the gallbladders of the cholecystitis patients using W-S ***,bacteria positive for H pylori antibodies were also found in 7.1% of the gallbladders of patients with cholecystitis by *** 81 gallbladders,11 were positive for both HPUA and HPUB,4 were positive for HPUA only and 7 were positive for HPUB ***:H pylori exist in the gallbladders of patients with chronic cholecystitis.

关键词： Hpylori Gallbladder mucosa Chronic cholecystitis Polymerase chain reaction Hpylori urease gene

Helicobacter pylori damages human gallbladder epithelial cells in vitro

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World Journal of Gastroenterology 2008年第45期14卷 6924-6928页

作者： Dong-Feng Chen Lu Hu Ping Yi Wei-Wen liu Dian- chun fang Hong Cao Department of Gastroenterology Daping Hospital Third Military Medical University Chongqing 400042 China

AIM: To study the mechanism by which Helicobacter pylori (H pylori) damages human gallbladder epithelial cells (HGBEC). METHODS: H pylori isolated from gallbladder were cultured in a liquid medium. Different concentration supernatants and sonicated extracts of H pylori cells were then added to HGBEC in a primary culture. The morphological changes in HGBEC as well as changes in the levels of alkaline phosphatase (ALP), lactate dehydrogenase (LDH) and glutamyltransferase (GGT) were ***: According to the culture curve of HGBEC, it was convenient to study the changes in HGBEC by adding H pylori sonicated extracts and H pylori culture supernatants. Both H pylori sonicated extracts and H pylori culture supernatants had a significant influence on HGBEC morphology, i.e. HGBEC grew more slowly, their viability decreased and their detachment increased. Furthermore, HGBEC ruptured and died. The levels of ALP (33.84 ± 6.00 vs 27.01 ± 4.67, P < 0.05), LDH (168.37 ± 20.84 vs 55.51 ± 17.17, P < 0.01) and GGT (42.01 ± 6.18 vs 25.34 ± 4.33, P < 0.01) significantly increased in the HGBEC culture supernatant in a time-and concentration-dependent. The damage to HGBEC in H pylori culture liquid was more significant than that in H pylori sonicated extracts. CONCLUSION: H pylori induces no obvious damage to HGBEC.

关键词： Alkaline phosphatase Glutamyltransferase Helicobacter pylori Human gallbladder epithelial cells Lactate dehydrogenase

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《夜行列车》中身体暴力现象研究

解放军外国语学院学报 2011年第2期34卷 99-103,119页

作者：刘春芳山东大学外国语学院山东济南250100 山东工商学院外国语学院山东烟台264005

马丁.艾米斯的《夜行列车》通过对美丽女性詹妮弗匪夷所思的自杀案件的侦破,揭示出当今社会中情感缺失、暴力泛滥的堪忧状况。通过分析身体暴力的表现形式,探讨身体暴力的根源以及身体暴力现象给予当代人的启示,可以揭示工具理性背景下... 详细信息

马丁.艾米斯的《夜行列车》通过对美丽女性詹妮弗匪夷所思的自杀案件的侦破,揭示出当今社会中情感缺失、暴力泛滥的堪忧状况。通过分析身体暴力的表现形式,探讨身体暴力的根源以及身体暴力现象给予当代人的启示,可以揭示工具理性背景下,契约性与功利性原则将充满灵性的身体变成了可占有、可利用的对象,使身体失去了其本来所代表的自然本性及自然情感的意义,从而使身体成为可憎之物和施暴对象。因此,摆脱工具理性对人性的压抑,倡导身体复兴,对当今社会具有积极的意义。

关键词：马丁·艾米斯夜行列车身体暴力

基于分数阶PID和重复控制的快速刀具伺服系统

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沈阳工业大学学报 2017年第5期39卷 486-490页

作者：刘春芳刘志沈阳工业大学电气工程学院沈阳110870

针对永磁直线同步电机(PMLSM)驱动的快速刀具伺服系统在高频输入信号时的系统跟踪精度问题,设计了一种分数阶PID重复控制算法.由于系统的参考信号和干扰信号都具有周期性的特点,通过对系统参考信号的跟踪和扰动的抑制研究,将改进型分数... 详细信息

针对永磁直线同步电机(PMLSM)驱动的快速刀具伺服系统在高频输入信号时的系统跟踪精度问题,设计了一种分数阶PID重复控制算法.由于系统的参考信号和干扰信号都具有周期性的特点,通过对系统参考信号的跟踪和扰动的抑制研究,将改进型分数阶PID控制和重复控制相结合,利用重复控制对周期性输入或复杂干扰信号的跟踪和抑制能力来补偿分数阶PID控制器,使系统有快速响应能力的同时具有较强的抗干扰性.仿真结果表明,所提出的控制策略有效地提高了伺服系统的跟踪精度,并对周期性扰动有较好的抑制作用.

关键词：永磁直线同步电机快速刀具伺服分数阶PID 重复控制快速响应抗干扰性跟踪精度周期性扰动

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雷公藤甲素抗类风湿性关节炎机制研究进展

中国中药杂志 2006年第19期31卷 1575-1579页

作者：刘春芳林娜中国中医科学院中药研究所北京100700

对雷公藤甲素治疗类风湿性关节炎(RA)的分子机制研究进行了综述。雷公藤甲素具有免疫抑制、抗炎反应、诱导细胞凋亡、抑制血管增生、保护软骨以及基因调控等多方面的作用,是一种有良好应用前景的新型免疫抑制剂。

关键词：雷公藤甲素类风湿性关节炎作用机制

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《心理之城》中的荒原后都市摹写

山东外语教学 2012年第2期33卷 74-78,84页

作者：刘春芳山东工商学院外国语学院(西校区) 山东烟台264005

麦克尤恩的小说《心理之城》以洛杉矶为背景,通过对四个人物的不同层级、不同侧面的心理现象的精准刻画,揭示出荒原后都市的文化状貌和人性生态。通过对荒原后都市状貌的源流及表征的探讨,以及荒原后都市中人性堕落、情感扭曲等现象的分... 详细信息

麦克尤恩的小说《心理之城》以洛杉矶为背景,通过对四个人物的不同层级、不同侧面的心理现象的精准刻画,揭示出荒原后都市的文化状貌和人性生态。通过对荒原后都市状貌的源流及表征的探讨,以及荒原后都市中人性堕落、情感扭曲等现象的分析,既能使人们深刻认知当代西方都市文化的多重生存困境,也能引发对当代都市文化重新建构的深入思考,同时对我国的都市文化建设起到一定的借鉴作用。

关键词：麦克尤恩《心理之城》荒原后都市人性生态

陌生的诱惑——劳伦斯作品中的陌生感及其根源

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解放军外国语学院学报 2005年第3期28卷 82-85页

作者：刘春芳山东工商学院外国语学院山东烟台264005

劳伦斯其人其文都因其神秘性而令人难以解读, 而贯穿在其作品及其整个生涯中的陌生感是劳伦斯神秘性的重要原因。对这种陌生感的具体表现进行全面深入地探讨, 进而挖掘出陌生感的根源, 可以从一个崭新的角度揭开劳伦斯创作的秘密及其独... 详细信息

劳伦斯其人其文都因其神秘性而令人难以解读, 而贯穿在其作品及其整个生涯中的陌生感是劳伦斯神秘性的重要原因。对这种陌生感的具体表现进行全面深入地探讨, 进而挖掘出陌生感的根源, 可以从一个崭新的角度揭开劳伦斯创作的秘密及其独特的内心世界。

关键词：劳伦斯陌生感根源