The chemical components of the essential oils in the barks and leaves of Eucommia ulmoides Oliver were analyzed and compared by chromatograms and mass spectra technique, heuristic evolving latent projections (HELP), a...The chemical components of the essential oils in the barks and leaves of Eucommia ulmoides Oliver were analyzed and compared by chromatograms and mass spectra technique, heuristic evolving latent projections (HELP), alternative moving window factor analysis (AMWFA) algorithms and normalization method based on the peak areas; the flavones in the barks and leaves of Eucommia ulmoides Oliver were separated on an ODS column by gradient elution carried out with the flow phase consisting of water, methanol and phosphoric acid (0.1%), and their contents were quantitatively determined by standard curve method and diode array detection (DAD) at 362 nm. The results show that 68 and 73 compounds respectively from essential oils of the barks and leaves of Eucommia ulmoides Oliver are identified, and there are 33 mutual compounds among 108 compounds determined. The total contents of these volatile components of the two samples possess 92.9% and 97.75% of the gross of the relevant essential oils, respectively; the contents of the rutin, quercetin and kaempferol in the barks and leaves of Eucommia ulmoides Oliver are 0.016 9, 0.003 6, 0.002 1 and 0.064 4, 0.030 2, 0.010 0 mg/g, respectively, and the determination recoveries are 95.2%-106.2%. The comparative analysis shows that for the barks and leaves of Eucommia ulmoides Oliver, there are significant differences in their components of the relevant essential oils and flavones.展开更多
A comparative proteomic analysis was performed to explore the mechanism of cell elongation in developing cotton fibers.The temporal changes of global proteomes at five representative
Public-Private Partnerships (PPPs) mode is a new governance mode which combines the advantages of government,private investor and the financial institution together.However,there is no sound legal system for PPPs in C...Public-Private Partnerships (PPPs) mode is a new governance mode which combines the advantages of government,private investor and the financial institution together.However,there is no sound legal system for PPPs in China at present.Therefore,it is critical to build a PPP legal legislation in order to facilitate investments in complex and long-term PPP arrangements,reduce transaction costs,ensure appropriate regulatory controls,and provide legal and economic mechanisms to enable the resolution of contract disputes.This article provides an international perspective on PPP legal framework by drawing upon the existing of PPP laws from several countries.展开更多
Chronic stress can induce hippocampus injury such as neuron loss and dendrite atrophy,but its mechanism and molecular basis remain unclear up to now.To understand the molecular mechanism on protein level and find the ...Chronic stress can induce hippocampus injury such as neuron loss and dendrite atrophy,but its mechanism and molecular basis remain unclear up to now.To understand the molecular mechanism on protein level and find the crucial proteins which correlated with chronic展开更多
The mixing time of impact zone in liquid-continuous impinging streams reactor(LISR) is theoretically calculated by empirical model and modern micromixing model of the fluid mixing process, and the variation laws of ma...The mixing time of impact zone in liquid-continuous impinging streams reactor(LISR) is theoretically calculated by empirical model and modern micromixing model of the fluid mixing process, and the variation laws of macromixing time and micromixing time are quantitatively discussed. The results show that under a continuous and stable operating condition, as the paddle speed increases, the macromixing time and micromixing time calculated by the two models both decrease, even in a linkage equilibrium state. Simultaneously, as the paddle speed increases, the results figured by the two models tend to be consistent. It indicates that two models both are more suitable for calculation of mixing time in high paddle speed. Compared with the existing experimental results of this type of reactor, the mixing time computed in the speed of 1500 r/min is closer to it. These conclusions can provide an important reference for systematically studying the strengthening mechanism of LISR under continuous mixing conditions.展开更多
目的运用文献计量学探究口腔癌智慧医疗领域的发展趋势、研究热点及未来方向,为后续研究提供参考。方法回顾性收集2003—2023年Web of Science Core Collection、Scopus和PubMed数据库口腔癌智慧医疗主题英文文献和中国知识基础设施工程...目的运用文献计量学探究口腔癌智慧医疗领域的发展趋势、研究热点及未来方向,为后续研究提供参考。方法回顾性收集2003—2023年Web of Science Core Collection、Scopus和PubMed数据库口腔癌智慧医疗主题英文文献和中国知识基础设施工程(简称中国知网)数据库同主题中文文献,利用VOSviewer 1.6.18软件对纳入文献的国家、机构、作者、被引频次、关键词进行循证可视化对比分析。结果共纳入547篇英文文献和34篇中文文献,发文量均呈上升趋势,且近几年增长趋势更加明显;美国是该领域贡献最大的国家,与其他国家学术交流紧密,而我国跨国、跨机构、跨团队合作较局限,网络结构具有明显地域性。此外,人工智能辅助口腔癌诊治是国内外文献共同关注的重点,英文文献侧重新型诊断技术的深层探索,中文文献倾向智慧康养及中药网络药理学的应用探究。结论口腔癌智慧医疗的持续发展使其在人工智能辅助诊断、智慧康养和中药特色药理学方面的应用研究日益深远,早期预警筛查亟待成为智慧医疗关爱口腔健康的重要着力点。展开更多
基金Project(20235020) supported by the National Natural Science Foundation of China
文摘The chemical components of the essential oils in the barks and leaves of Eucommia ulmoides Oliver were analyzed and compared by chromatograms and mass spectra technique, heuristic evolving latent projections (HELP), alternative moving window factor analysis (AMWFA) algorithms and normalization method based on the peak areas; the flavones in the barks and leaves of Eucommia ulmoides Oliver were separated on an ODS column by gradient elution carried out with the flow phase consisting of water, methanol and phosphoric acid (0.1%), and their contents were quantitatively determined by standard curve method and diode array detection (DAD) at 362 nm. The results show that 68 and 73 compounds respectively from essential oils of the barks and leaves of Eucommia ulmoides Oliver are identified, and there are 33 mutual compounds among 108 compounds determined. The total contents of these volatile components of the two samples possess 92.9% and 97.75% of the gross of the relevant essential oils, respectively; the contents of the rutin, quercetin and kaempferol in the barks and leaves of Eucommia ulmoides Oliver are 0.016 9, 0.003 6, 0.002 1 and 0.064 4, 0.030 2, 0.010 0 mg/g, respectively, and the determination recoveries are 95.2%-106.2%. The comparative analysis shows that for the barks and leaves of Eucommia ulmoides Oliver, there are significant differences in their components of the relevant essential oils and flavones.
文摘A comparative proteomic analysis was performed to explore the mechanism of cell elongation in developing cotton fibers.The temporal changes of global proteomes at five representative
基金the staged achievement of National Social Science Project(15CFX053)supported by scientific research project of SWPU(2017RW010)funded by the Chinese Scholarship Council and the Energy Law Research Team of SWPU(2018CXTD13)
文摘Public-Private Partnerships (PPPs) mode is a new governance mode which combines the advantages of government,private investor and the financial institution together.However,there is no sound legal system for PPPs in China at present.Therefore,it is critical to build a PPP legal legislation in order to facilitate investments in complex and long-term PPP arrangements,reduce transaction costs,ensure appropriate regulatory controls,and provide legal and economic mechanisms to enable the resolution of contract disputes.This article provides an international perspective on PPP legal framework by drawing upon the existing of PPP laws from several countries.
文摘Chronic stress can induce hippocampus injury such as neuron loss and dendrite atrophy,but its mechanism and molecular basis remain unclear up to now.To understand the molecular mechanism on protein level and find the crucial proteins which correlated with chronic
基金Project(51276131)supported by the National Natural Science Foundation of ChinaProject(ZRZ0316)supported by the Natural Science Foundation of Hubei Province,ChinaProject(2013070104010025)supported by the Morning Glory Project of Wuhan Science and Technology Bureau,China
文摘The mixing time of impact zone in liquid-continuous impinging streams reactor(LISR) is theoretically calculated by empirical model and modern micromixing model of the fluid mixing process, and the variation laws of macromixing time and micromixing time are quantitatively discussed. The results show that under a continuous and stable operating condition, as the paddle speed increases, the macromixing time and micromixing time calculated by the two models both decrease, even in a linkage equilibrium state. Simultaneously, as the paddle speed increases, the results figured by the two models tend to be consistent. It indicates that two models both are more suitable for calculation of mixing time in high paddle speed. Compared with the existing experimental results of this type of reactor, the mixing time computed in the speed of 1500 r/min is closer to it. These conclusions can provide an important reference for systematically studying the strengthening mechanism of LISR under continuous mixing conditions.
