基于多指标定量指纹图谱和化学计量学的淫羊藿质量标准提高研究

进一步完善淫羊藿质量评价体系,提高淫羊藿质量标准。以6种8-异戊烯基黄酮苷作为指标成分,通过HPLC对4个品种、共24批次淫羊藿开展多指标定量指纹图谱的研究,并结合聚类分析(Hierarchical Clustering Analysis,HCA)、主成分分析(Principal Component Analysis,PCA)和正交偏最小二乘法判别分析(Orthogonal Partial Least Squares Discriminant Analysis,OPLS-DA)化学计量学方法进行质量评价。4个品种淫羊藿在相似度、指标成分含量上差异较大。发现朝藿定C、淫羊藿苷、淫羊藿次苷Ⅰ和宝藿苷Ⅰ是造成不同品种淫羊藿差异的特征性成分,淫羊藿次苷Ⅰ和宝藿苷Ⅰ可作为药材质量控制指标成分。建立的多指标定量指纹图谱分析方法稳定、可靠,结合化学计量学可更加全面、快速对淫羊藿进行质量评价,为今后提高淫羊藿的质量标准提供了科学依据。

Riding the Korean Wave

On December 20,2015,the China-South Korea Free Trade Agreement(FTA)officially came into force.Today,with the rapid growth of the Chinese economy,South Korea,a neighbor of China in the Northeast Asia economic circle,is gradually developing China into its most important overseas cosmetics market.Pop culture has helped spread their reputation,beauty products are often integrated into popular Korean dramas and Korean cosmetics

Mindfulness-based cognitive safety and spiritual safety leadership for voluntary safety practice

Organizations are making great efforts to improve their level of safety,but accidents continue to occur,and safety issues are not easily solved within an organization.Therefore,the importance of voluntary safety is increasing,and as a result,interest in safety culture has recently increased.However,the concept of safety culture is ambiguous and the implementation of safety culture is not improving in the correct manner.This work proposes a unique framework for voluntary safety practice within an organization.This framework consists of Mindfulness-Based Cognitive Safety(MBCS)and spiritual safety leadership.From the perspective of safety within the concept of safety culture,safety has been considered a sub-facet of organizational culture.However,from a new perspective suggested by this study,safety is regarded as another important value separated from organizational culture,in which members should make intentional efforts based on safety awareness.MBCS maintains such safety awareness through self-safety cognition,while spiritual safety leadership is a fundamental foundation and fuel for self-safety cognition.Based on this,industries can pursue ideal safety and increase the integrity of the organization.This work provides effective guidance to improve safety management and emergency management related to industrial accidents.

Emergency Management Science and Technology:An international transdisciplinary platform

Clear evidence indicates that the earth is experiencing a gradual increase in global average temperature,which is deemed to contribute considerably to the frequent occurrence of extreme natural events,including droughts,flooding,hurricanes,storm surges,wildfires,desertification,sandstorms,landslides,debris flows,plague,and crop biological disasters.Additionally,human-related or technological disasters,such as industrial and transportation accidents,further facilitate the risk of human exposure to extreme urban hazards,and cause high casualties,fatalities and financial losses.These worldwide natural disasters and tremendous production safety accidents have had a huge negative impact on human life and posed devastating threats to social stability.The last few decades have witnessed a dramatic increase in disastrous events.Over the past decade,more than 7,300 disastrous events were reported worldwide,an increase of 73%compared to those reported between 1980 and 1999[1].In order to improve the response capability and minimize property damage when encountering various types of disasters,emergency management(EM)systems have been established rapidly in most countries and regions.The development of timely and effective EM systems has become increasingly attractive,primarily aiming to help and enable emergency managers to prepare for unanticipated disasters and respond to urgent events.The definition of EM is given as an integrated decision support system composed of a variety of tasks that covers the lifecycle of an emergency event[2].Effective prevention of emergency events serves as a key role in EM systems aimed at minimizing or eliminating losses and impacts in advance.

Content analysis of state hazard mitigation plans and their ability to address pandemics

Hazard mitigation plans address hazards such as earthquakes,hurricanes,landslides,tornados,flooding more explicitly than pandemics or other public health crises.This paper analyzes and identifies pandemic-related mitigation strategies in state-level hazard mitigation plans across the United States.This study identifies common and uncommon strategies that could be included in plan updates such as:use of personal protective equipment(PPE),self-isolation/quarantine,hygiene,restricted gatherings,vaccination,vulnerability assessment,economic consequences analysis,acknowledging the need to address pandemics,and referring Centers for Disease Control and Prevention(CDC)guidelines.The 54 statelevel plans are compared based on their inclusion of the nine strategies.Findings show that vaccination,self-isolation/quarantine,and vulnerability assessment are the strategies most listed in plans.Additional concerns made evident by the 2020 coronavirus pandemic,such as contact tracing,environmental impact,and public services,were limited across the plans.It was concluded that long-term mitigation strategies for reducing the risk and speed of spread such as identifying strategic locations for testing,vaccination,and quarantine should be devised and implemented.Pandemics should be included as a distinct class of hazards while formulating state hazard mitigation plans.Strategies for addressing the impact of long working hours on the mental health of healthcare workers should be explored.Economic and psychological impact of unavailability of essential public services,such as transport and groceries,should be investigated and strategies should be formulated in the mitigation plans accordingly.

Review and analysis of pipeline leak detection methods

管道爆裂或破裂导致的泄漏可能对生态环境造成很大影响,并严重影响管道运营公司的声誉。近年来,管道运营商有望为油气管道配备泄漏检测系统,用于监测管道运行情况并检测管道是否发生泄漏。目前,已实现商业应用的泄漏监测方法很多,虽然这些方法无法防止泄漏发生,但对控制泄漏及其造成的影响具有至关重要的作用。对当前主流油气管道泄漏检测方法的设计原理及应用进行了综述,分析评价了各种方法的特点及局限性,并对进一步提高管道泄漏检测技术的精确度、可靠性及适用性提出建议。

Biofilm inhibition and corrosion resistance of 2205-Cu duplex stainless steel against acid producing bacterium Acetobacter aceti

Acid producing bacterium Acetobacter aceti causes pitting corrosion of stainless steel(SS).This work investigated the enhanced resistance of 2205-Cu duplex stainless steel(DSS)against biocorrosion by A.aceti in comparison with 2205 DSS using electrochemical and surface analysis techniques.With the addition of Cu to 2205 DSS,biofilms on the 2205-Cu DSS surface were inhibited effectively.The largest pit depth on 2205-Cu DSS surface in the presence of A aceti was 2.6μm,smaller than 5.5μm for 2205 DSS surface.The i(corr)was 0.42±0.03μA cm^-2 for 2205-Cu DSS in the biotic medium,which was much lower than that for 2205 DSS(3.69±0.65μA cm^-2).All the results indicated that the A aceti biofilm was considerably inhibited by the release of Cu^2+ions from the 2205-Cu DSS matrix,resulting in the mitigation of biocorrosion by A aceti.