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Gas chromatography-mass spectrometry analysis of essential oils from five parts of Chaihu(Radix Bupleuri Chinensis)

Journal of Traditional Chinese Medicine 2014年第6期34卷 741-748页

作者： Jie Meng Xingfu Chen Wenyu yang Jiuhua Song Yu Zhang Zhifei Li Xingwang yang zhanguo yang Department of Pharmaceutical Botany College of Agronomy Sichuan Agricultural University Key Laboratory of Crop Physiology Ecology and Cultivation inSouthwest Ministry of Agriculture Production Division Sichuan Depeiyuan Traditional Chinese Medicine Technology Development Co. Ltd.

OBJECTIVE: To analyze the essential oils from flowers, leaves, stems, roots, and fruits of Chaihu(Radix Bupleuri Chinensis).METHODS: We extracted essential oils from different parts of Chaihu(Radix Bupleuri Chinensis) using a steam distillation method. The essential oils were analyzed by gas chromatography-mass spectrometry(GC-MS). Data were collected in full scan mode(m/z 60-600). Volatile components were identified based on their retention indices and by comparing their mass spectra with those in the National Institute of Standards and Technology 2005 database assisted by tandem mass spectrometry information. The relative content of each constituent wasdetermined by area ***: We identified 111 components, of which12 were common to all 5 parts, 30 were found only in roots, 14 were found only in flowers, 6 were found only in leaves, 4 were found only in stems,and 17 were found only in ***: Our results show that the stems,flowers, leaves, and fruits of Chaihu(Radix Bupleuri Chinensis)contain a high concentration of essential oils, and that the exact composition of the essential oils differs among the plant parts. To develop new medicines and make full use of the Chaihu(Radix Bupleuri Chinensis)resource, it is important to characterize the essential oils from different parts of the plant. In future research, it will be important to determine the pharmacological effects of the various components and the essential oil mixtures.

关键词： Gas chromatography-mass spectrome-try Oils, volatile Chaihu (Radix Bupleuri Chinensis)

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关于推进我国政治文明建设的几点思考

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中国特色社会主义研究 2007年第5期 73-76页

作者：杨占国吉林大学行政学院

政治文明建设是我国现代化建设的重要组成部分,衡量政治文明建设的主要指标是,国家治理的法制化程度、权力更迭的民主化程度、官民关系的平等化程度、政治参与的有序化程度。本文在分析了影响我国政治文明建设的诸多因素后,着重阐述了... 详细信息

政治文明建设是我国现代化建设的重要组成部分,衡量政治文明建设的主要指标是,国家治理的法制化程度、权力更迭的民主化程度、官民关系的平等化程度、政治参与的有序化程度。本文在分析了影响我国政治文明建设的诸多因素后,着重阐述了推进我国政治文明建设要从改变党的执政理念和执政方式入手,由党政不分向党政分开转变、由政策治国向法律治国转变、由无限型向有限型转变、由党管干部向党选干部转变。

关键词：政治文明建设社会主义执政方式

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Cell-cycle-dependent variation in UV absorption spectrum of Hela cells treated with Trichostatin A

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The Chinese-German Journal of Clinical Oncology 2012年第12期11卷 737-740页

作者： Fengqiu Zhang Xiaoxia Wang zhanguo yang Physical Engineering College Zhengzhou University Zhengzhou 450052 China Henan Province Institute oF Metrology Zhengzhou450008.China

Objective： The aim of our study was to discovery the different cell cycle arrest effect after different densities HeLa cells treated with Trichostatin A （TSA）. In addition, this study would find some important relationship between cycle arrest effect and UV absorption spectrum of cell. Methods： 0.2 IJM TSA was applied to act on HeLa cells of different density. Then, the cycle arrest effect and UV absorption spectrum of cells were investigated, which provide support to analyze the effect of TSA on cancer cells. Results： Cell cycle arrest effect in G0/G1 of the lower density cells was more obvious than that in other groups. The other discovery in this work was that the cellular UV absorption value was higher when the density of cultured cell was lower. Conclusion： This experiment would guide the clinical study on early or late stage cancer patients in the future. On the other hand, this work indicates when cells were arrested in G0/G1 phase, the cellular absorption value increased at the same time, so UV absorption spectrum could characterize the change of cell cycle.

关键词： Trichostatin A HeLa cells cell cycle UV absorption spectrum

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Study on creep deformation and energy development of underground surrounding rock under four‐dimensional support

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Deep Underground Science and Engineering 2024年第1期3卷 25-38页

作者： zhanguo Ma Junyu Sun Peng Gong Pengfei Yan Nan Cui Ruichong Zhang School of Mechanics and Civil Engineering China University of Mining and TechnologyXuzhouChina State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhouChina Department of Mining Engineering Colorado School of MinesGoldenUSA

There is an urgent need to develop optimal solutions for deformation control of deep high‐stress roadways,one of the critical problems in underground *** previously proposed four‐dimensional support(hereinafter 4D support),as a new support technology,can set the roadway surrounding rock under three‐dimensional pressure in the new balanced structure,and prevent instability of surrounding rock in underground ***,the influence of roadway depth and creep deformation on the surrounding rock supported by 4D support is still *** study investigated the influence of roadway depth and creep deformation time on the instability of surrounding rock by analyzing the energy *** elastic strain energy was analyzed using the program redeveloped in *** numerical simulation results indicate that the combined support mode of 4D roof supports and conventional side supports is highly applicable to the stability control of surrounding rock with a roadway depth exceeding 520 *** the increase of roadway depth,4D support can effectively restrain the area and depth of plastic deformation in the surrounding ***,4D support limits the accumulation range and rate of elastic strain energy as the creep deformation time increases.4D support can effectively reduce the plastic deformation of roadway surrounding rock and maintain the stability for a long deformation period of 6 *** confirmed by in situ monitoring results,4D support is more effective for the long‐term stability control of surrounding rock than conventional support.

关键词： coal mines elastic strain energy four‐dimensional support large roadway depth long‐term stability control plastic deformation surrounding rock

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Growth of two-inch free-standing heteroepitaxial diamond on Ir/YSZ/Si(001)substrates via laser-patterned templates

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Journal of Semiconductors 2024年第9期45卷 4-6页

作者： Pengfei Qu Peng Jin Guangdi Zhou Zhen Wang zhanguo Wang Laboratory of Solid-State Optoelectronic Information Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

As an ultra-wide bandgap semiconductor,diamond garners significant interest due to its exceptional physical properties^([1–3]).These superior characteristics make diamonds highly promising for applications in power electronics^([4]),deep-ultraviolet detectors^([5]),high-energy particle detectors^([6]),and quantum devices based on color centers^([7]).

关键词： template exceptional diamond

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Improvement strategy on thermophysical properties of A_(2)B_(2)O_(7)-type rare earth zirconates for thermal barrier coatings applications:A review

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International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1147-1165页

作者： Zijian Peng Yuhao Wang Shuqi Wang Junteng Yao Qingyuan Zhao Enyu Xie Guoliang Chen Zhigang Wang zhanguo Liu Yaming Wang Jiahu Ouyang School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials and Metallurgical Engineering Inner Mongolia University of Science&TechnologyBaotou 014010China

The A_(2)B_(2)O_(7)-type rare earth zirconate compounds have been considered as promising candidates for thermal barrier coating(TBC) materials because of their low sintering rate,improved phase stability,and reduced thermal conductivity in contrast with the currently used yttria-partially stabilized zirconia (YSZ) in high operating temperature *** review summarizes the recent progress on rare earth zirconates for TBCs that insulate high-temperature gas from hot-section components in gas *** on the first principles,molecular dynamics,and new data-driven calculation approaches,doping and high-entropy strategies have now been adopted in advanced TBC materials *** this paper,the solid-state heat transfer mechanism of TBCs is explained from two aspects,including heat conduction over the full operating temperature range and thermal radiation at medium and high *** paper also provides new insights into design considerations of adaptive TBC materials,and the challenges and potential breakthroughs are further highlighted for extreme environmental *** for improving thermophysical performance are proposed in two approaches:defect engineering and material compositing.

关键词： rare earth zirconates thermal barrier coatings defect engineering doping and compositing thermal conductivity thermal expansion

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多煤层开采下伏巷道零内错布置及支护设计研究

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山西煤炭 2014年第7期34卷 26-28页

作者：杨占国同煤集团四台矿山西大同037016

为了解决多煤层开采下伏工作面煤柱逐渐增大的问题,以四台矿14号煤层311盘区81105面为对象,利用极限平衡理论,计算得12号煤层开采对底板的最大破坏深度2.74 m,距巷帮水平距离1.85 m,使14号煤层51105巷顶板保留了足够岩层,且释放顶板上... 详细信息

为了解决多煤层开采下伏工作面煤柱逐渐增大的问题,以四台矿14号煤层311盘区81105面为对象,利用极限平衡理论,计算得12号煤层开采对底板的最大破坏深度2.74 m,距巷帮水平距离1.85 m,使14号煤层51105巷顶板保留了足够岩层,且释放顶板上部分应力,保障了14号煤层81105面的零内错布置实施;通过钢带锚杆的支护,14号煤层51105巷顶板表面最大拉应力承载能力达到51.7 MPa,远大于超前支承压力时的拉应力承受值,验证了巷道支护的可靠性。工程结果表明,掘进中巷道顶板没有发现明显变形,最大下沉量仅18.3 mm,并因采用零内错布置,仅81105面就可多采原煤20 592 t,取得了较大的经济效益和社会效益。

关键词：多煤层零内错布置支护技术

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我国土地资源管理和利用中存在的问题及对策

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辽宁行政学院学报 2020年第4期22卷 65-69页

作者：杨占国自然资源部沈阳督察局监督室辽宁沈阳110013

从土地资源的功能上讲,主要有生产功能、生活功能和生态功能。从我国土地资源利用的现状上看,土地的生产功能和生活功能在工业化、城市化的背景下得以强化,而土地的生态功能却在退化。从大的方向上看,“建设用地不足就挤占耕地、耕地不... 详细信息

从土地资源的功能上讲,主要有生产功能、生活功能和生态功能。从我国土地资源利用的现状上看,土地的生产功能和生活功能在工业化、城市化的背景下得以强化,而土地的生态功能却在退化。从大的方向上看,“建设用地不足就挤占耕地、耕地不足就挤占生态用地”,这种趋势并没有大的改观。突出表现就是在发展空间上城市与乡村间、工业与农业间等的博弈,在发展权和用地指标上地方与中央间的博弈。为此,必须树立山水林田湖草是生命共同体的理念,发挥国土空间的规划管控作用,进一步明确城镇空间、农业空间、生态空间,为各类开发建设、生产经营提供平台、边界和依据。要严格落实节约集约用地政策,强化督察监督与执法监督,确保各项政策落地。

关键词：土地资源土地利用土地管理

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浅谈一种猪场洗消中心的布置

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现代食品 2019年第22期4卷 55-57页

作者：杨占国郑州中粮科研设计院有限公司

随着我国养猪场规模的不断扩大,猪只饲养密度过大、生猪运输流动频繁、非法疫苗屡禁不止等因素已成为标准化养猪顺利进行的关键痛点,洗消中心的配备则变成猪场建设不可或缺的重点项目。本文描述了一种猪场洗消中心的布置方案。

关键词：猪场洗消中心防疫

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倡导类风湿关节炎深度缓解:无致残可望可及

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中华内科杂志 2024年第8期63卷 731-733页

作者：栗占国北京大学人民医院风湿免疫科北京100044

近年来,临床深度缓解已成为类风湿关节炎(RA)最为关注的治疗理念之一。近些年,RA的缓解率已得到明显改善,但仍有许多患者未得到规范治疗,长期处于病情活动状态,最终导致残疾。临床研究显示,RA治疗中的临床深度缓解策略对患者长期预后及... 详细信息

近年来,临床深度缓解已成为类风湿关节炎(RA)最为关注的治疗理念之一。近些年,RA的缓解率已得到明显改善,但仍有许多患者未得到规范治疗,长期处于病情活动状态,最终导致残疾。临床研究显示,RA治疗中的临床深度缓解策略对患者长期预后及减少复发具有重要意义。了解深度缓解策略,强调专科医生指导下的医患共同决策,积极倡导RA的早期治疗和规范用药,将进一步改善RA患者的预后,从而实现无致残的目标。

关键词：关节炎,类风湿深度缓解无致残

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