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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：气相色谱质谱图柴胡精油羊草光谱分析水蒸气蒸馏法美国国家标准

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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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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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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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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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Genetic mechanism and main controlling factors of high-quality clastic rock reservoirs in deep and ultradeep layers:A case study of Oligocene Linhe Formation in Linhe Depression,Hetao Basin,NW China

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Petroleum Exploration and Development 2024年第3期51卷 548-562页

作者： SHI Yuanpeng LIU zhanguo WANG Shaochun WU Jin LIU Xiheng HU Yanxu CHEN Shuguang FENG Guangye WANG Biao WANG Haoyu PetroChina Huabei Oilfield Company Renqiu 062552China PetroChina Hangzhou Research institute of Geology Hangzhou 310023China

Based on new data from cores,drilling and logging,combined with extensive rock and mineral testing analysis,a systematic analysis is conducted on the characteristics,diagenesis types,genesis and controlling factors of deep to ultra-deep abnormally high porosity clastic rock reservoirs in the Oligocene Linhe Formation in the Hetao *** reservoir space of the deep to ultra-deep clastic rock reservoirs in the Linhe Formation is mainly primary pores,and the coupling of three favorable diagenetic elements,namely the rock fabric with strong compaction resistance,weak thermal compaction diagenetic dynamic field,and diagenetic environment with weak fluid compaction-weak cementation,is conducive to the preservation of primary *** Linhe Formation clastic rocks have a superior preexisting material composition,with an average total content of 90%for quartz,feldspar,and rigid rock fragments,and strong resistance to *** geothermal gradient in Linhe Depression in the range of(2.0–2.6)°C/100 m is low,and together with the burial history of long-term shallow burial and late rapid deep burial,it forms a weak thermal compaction diagenetic dynamic field *** diagenetic environment of the saline lake basin is characterized by weak fluid *** the same time,the paleosalinity has zoning characteristics,and weak cementation in low salinity areas is conducive to the preservation of primary *** hydrodynamic conditions of sedimentation,salinity differentiation of ancient water in saline lake basins,and sand body thickness jointly control the distribution of high-quality reservoirs in the Linhe Formation.

关键词： Hetao Basin Linhe Depression Oligocene Linhe Formation deep and ultra-deep abnormally high porosity reservoir genesis

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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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HeLa细胞经曲古菌素A处理后紫外光谱的细胞周期依赖性变化(英文)

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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 μM 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：细胞周期阻滞紫外吸收光谱 Hela细胞依赖性 HeLa细胞细胞密度霉素 TSA

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浅埋极近距采空区下相向开采房柱采空区煤柱稳定性分析

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采矿与安全工程学报 2022年第1期39卷 118-125页

作者：黄庆享王林涛杜君武贺雁鹏杨占国刘昭申浩岳元亮西安科技大学能源学院陕西西安710054 神府经济开发区海湾煤矿有限公司三号井陕西神木719316 神府集华王才伙盘矿业有限公司陕西神木719316

以海湾煤矿长壁采空区下2206长壁工作面与王才伙盘煤矿房柱采空区下2201长壁工作面相向安全开采为工程背景,采用FLAC^(3D)数值计算、物理模拟及理论分析相结合的方法,针对7 m极近距离煤层开采上部房柱采空区煤柱稳定性进行研究。结果表... 详细信息

以海湾煤矿长壁采空区下2206长壁工作面与王才伙盘煤矿房柱采空区下2201长壁工作面相向安全开采为工程背景,采用FLAC^(3D)数值计算、物理模拟及理论分析相结合的方法,针对7 m极近距离煤层开采上部房柱采空区煤柱稳定性进行研究。结果表明:2201工作面开采前,上部房柱区遗留煤柱平均载荷为7.6 MPa,安全系数为3.4,煤柱整体稳定。下煤层两工作面相向开采至相距30 m时,房柱采空区煤柱应力进入相向开采影响阶段,煤柱应力出现上升拐点;两工作面相向开采交错约10 m时,煤柱集中应力达到最大,为9.1 MPa;相向开采相互影响段两工作面同时推进的最大集中应力比单工作面推进高约4.6%。为避免2201工作面上部房柱采空区大范围失稳,在相互影响阶段(相距30 m)应采取2201工作面停采、2206工作面推进的措施,房柱区煤柱安全系数为2.96,煤柱安全稳定。研究结果得到开采验证,实现了安全开采。

关键词：浅埋极近距离相向开采房柱采空区煤柱稳定性

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聚酯纤维泡沫混凝土力学性能及孔结构研究

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材料导报 2024年第1期38卷 105-112页

作者：王述红贡藩尹宏修占国东北大学资源与土木工程学院沈阳110819

纤维的掺加可有效地改善泡沫混凝土抗压强度低、脆性特征显著的缺陷,增强其工程适用性。本工作针对聚酯纤维对泡沫混凝土力学性能的改善开展试验研究,选定密度等级为700 kg/m3的泡沫混凝土,考虑不同纤维体积掺量(0.1%、0.2%、0.3%和0.4%... 详细信息

纤维的掺加可有效地改善泡沫混凝土抗压强度低、脆性特征显著的缺陷,增强其工程适用性。本工作针对聚酯纤维对泡沫混凝土力学性能的改善开展试验研究,选定密度等级为700 kg/m3的泡沫混凝土,考虑不同纤维体积掺量(0.1%、0.2%、0.3%和0.4%)对其抗压强度、抗折强度、劈裂抗拉强度以及延性的影响。结果表明:纤维掺量为0.1%时,材料表现出较优的抗压和劈裂抗拉性能,28 d强度分别增加了86.4%和91.3%;纤维掺量为0.2%时,材料表现出较优的抗折性能,28 d抗折强度提升了39.1%。试样破坏形态和应力-应变曲线表明,聚酯纤维可有效地提升泡沫混凝土的延性。最后,运用图像分析处理法分别获得了五组试件的孔结构参数,从细观孔结构的角度讨论了聚酯纤维对泡沫混凝土抗压强度的影响机理。

关键词：泡沫混凝土聚酯纤维力学性能孔结构图像处理

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