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Effect of cadmium on photosynthetic pigments,lipid peroxidation,antioxidants,and artemisinin in hydroponically grown Artemisia annua

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Journal of Environmental Sciences 2012年第8期24卷 1511-1518页

作者： Xuan Li manxi Zhao Lanping Guo Luqi Huang School of Life Science and Engineering Southwest Jiaotong UniversityChengdu 610031China Institute of Chinese Materia Medica China Academy of Chinese Medical SciencesBeijing 100700China

The effects of different cadmium （Cd） concentrations （0, 20, 60, and 100 μmol/L） on hydroponically grown Artemisia annua L. were investigated. Cd treatments applied for 0, 4, 12, 24, 72, 144, 216, and 336 hr were assessed by measuring the changes in photosynthetic pigments, electrolyte leakage, malondialdehyde （MDA） and antioxidants （ascorbic acid and glutathione）, while the artemisinin content was tested after 0, 12, 144, 216, and 336 hr. A significant decrease was observed in photosynthetic pigment levels over time with increasing Cd concentration. Chlorophyll b levels were more affected by Cd than were chlorophyll a or carotenoid levels. The cell membrane was sensitive to Cd stress, as MDA content in all treatment groups showed insignificant differences from the control group, except at 12 hr treatment time. Ascorbic acid （AsA） content changed slightly over time, while glutathione （GSH） content took less time to reach a maximum as Cd concentration increased. Cd was found to promote synthesis and accumulation of artemisinin, especially at concentrations of 20 and 100 ~tmol/L. In conclusion, Cd stress can damage to photosynthetic pigments, and vigorously growing A. annua showed a strong tolerance for Cd stress. Appropriate amounts of added Cd aided synthesis and accumulation of artemisinin.

关键词： cadmium photosynthetic pigments oxidative stress artemisinin Artemisia annua

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“星链”计划在俄乌军事冲突中的应用与启示

通信技术 2023年第4期56卷 476-482页

作者：张广娜刘旭光骆华东王满喜张鹭周继航 63892部队河南洛阳471000 31626部队广东广州510800

美国太空技术探索公司(SpaceX)所提出的“星链”计划是当前最具有代表性的低轨卫星星座,该计划自问世以来因其高速率、低时延、全覆盖等特点备受关注,不仅在商业领域具有极强的竞争力,且军事应用前景较广,战略价值极大。俄乌军事冲突爆... 详细信息

美国太空技术探索公司(SpaceX)所提出的“星链”计划是当前最具有代表性的低轨卫星星座,该计划自问世以来因其高速率、低时延、全覆盖等特点备受关注,不仅在商业领域具有极强的竞争力,且军事应用前景较广,战略价值极大。俄乌军事冲突爆发后,“星链”在恢复战场通信、支援乌军武装力量态势监控、帮助打击俄军目标及外交舆论等领域发挥了重要作用。“星链”等低轨星座和军事相结合不仅增强了天基对地观测、通信、定位和控制能力,同时深刻影响军事作战时观察、判断、决策及行动全过程,对未来战争的作战进程和样式、指挥方式和战争结果也产生了深远影响。我国应高度重视“星链”发展动向,加速卫星布局,推动天基互联网系统的建设发展,有针对性地应对“星链”威胁。

关键词：低轨卫星星座 “星链”计划俄乌军事冲突军事应用天基互联网系统

Conversion of female germline stem cells from neonatal and prepubertal mice into pluripotent stern cells

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Journal of Molecular Cell Biology 2014年第2期8卷 164-171页

作者： Hu wang manxi Jiang Haiwei Bi Xuejin Chen Lin He Xiaoyong Li Ji Wu Key Laboratory for the Genetics of Developmental and Neuropsychiatric Disorders (Ministry of Education) Bio-X Institutes Shanghai Jiao Tong University Shanghai 200240 China Department of Laboratory Animal Sciences Shanghai Jiao Tong University School of Medicine Shanghai 200025 China

Pluripotent stem cells derived from neonatal or adult testes are a useful tool to examine the mechanisms of pluripotency and a resource for cell-based therapies. However, therapies usingthese cells will only benefit males but not females. Recently, female germline stem cells （FGSCs） were discovered in ovaries. Whether FGSCs can be converted into pluripotent stem cells, similar to spermatogonial stem cells, is unknown. Here, we demonstrate that female embryonic stem-like cells （fESLCs） can be generated within 1 month from the stably proliferating FGSCs cultured in embryonic stem cell （ESC） medium, fESLCs exhibit properties similar to those of ESCs in terms of marker expression and differentiation potential. Thus, our findings suggest that generation of patient-specific fESLCs is feasible and provides a foundation for personalized regenerative applications.

关键词： embryonic stem-like cells female germline stem cells adult stem cells

Crowd Counting Based on WiFi Channel State Information and Transfer Learning

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Journal of Computer and Communications 2022年第6期10卷 22-36页

作者： Zhongqiang Wu Pengyu Ji manxi Ma Wencheng Zhuang Zhenyu Li Jihao Cui Zhengjie wang College of Electronic and Information Engineering Shandong University of Science and Technology Qingdao China

With the popularity and development of indoor WiFi equipment, they have more sensing capability and can be used as a human monitoring device. We can collect the channel state information (CSI) from WiFi device and acquire the human state based on the measurements. These studies have attracted wide attention and become a hot research topic. This paper concentrated on the crowd counting based on CSI and transfer learning. We utilized the CSI signal fluctuations caused by human motion in WiFi coverage to identify the person count because different person counts would lead to unique signal propagation characteristics. First, this paper presented recent studies of crowd counting based on CSI. Then, we introduced the basic concept of CSI, and described the fundamental principle of CSI-based crowd counting. We also presented the system framework, experiment scenario, and neural network structure transferred from the ResNet. Next, we presented the experiment results and compared the accuracy using different neural network models. The system achieved recognition accuracy of this 100 percent for seven participants using the transfer learning technique. Finally, we concluded the paper by discussing the current problems and future work.

关键词： Crowd Counting Channel Status Information Transfer Learning ResNet

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高温聚合物薄膜电容器介电材料评述与展望

高电压技术 2021年第9期47卷 3105-3123页

作者：李琦李曼茜清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室北京100084

聚合物电介质材料以其高充放电速率、高功率密度、高击穿场强和自愈性等优点被广泛应用于静电电容器中。然而新能源汽车、光伏并网、油气勘探、航空航天等应用对聚合物电容器在高温下的介电储能性能提出了更高的要求。为此介绍了电介质... 详细信息

聚合物电介质材料以其高充放电速率、高功率密度、高击穿场强和自愈性等优点被广泛应用于静电电容器中。然而新能源汽车、光伏并网、油气勘探、航空航天等应用对聚合物电容器在高温下的介电储能性能提出了更高的要求。为此介绍了电介质材料的基本物理背景,综述了一些典型的高温介电聚合物,重点介绍了介电聚合物复合材料,包括表面处理聚合物、基于填料形貌分类的聚合物基纳米复合材料、三明治结构复合材料和聚合物–分子半导体全有机复合材料。还对复合材料的电荷注入和输运特性与基体和纳米粒子的界面微区特性的最新研究进展进行了介绍。最后对高温聚合物电介质材料的发展现状和存在的挑战进行了简要总结。

关键词：聚合物电容器介电材料高温纳米复合材料

Noggin versus basic fibroblast growth factor on the differentiation of human embryonic stem cells

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Neural Regeneration Research 2013年第23期8卷 2171-2177页

作者： Yan Zhang Junmei Zhou Zhenfu Fang manxi Jiang Xuejin Chen Department of Laboratory Animal Sciences Shanghai Jiao Tong University School of Medicine Tissue Engineering Laboratory Shanghai Institute for Pediatric ResearchXinhua HospitalSchool of MedicineShanghai Jiao Tong University

The difference between Noggin and basic fibroblast growth factor for the neural precursor differen- tiation from human embryonic stem cells has not been studied. In this study, 100 tJg/L Noggin or 20 IJg/L basic fibroblast growth factor in serum-free neural induction medium was used to differen- tiate human embryonic stem cells H14 into neural precursors using monolayer differentiation. Two weeks after induction, significantly higher numbers of neural rosettes formed in the Noggin-induced group than the basic fibroblast growth factor-induced group, as detected by phase contrast micro- scope. Immunofluorescence staining revealed expression levels of Nestin, [3-111 Tubulin and Sox-1 were higher in the induced cells and reverse-transcription PCR showed induced cells expressed Nestin, Sox-1 and Neurofilament mRNA. Protein and mRNA expression in the Noggin-induced group was increased compared with the basic fibroblast growth factor-induced group. Noggin has a greater effect than basic fibroblast growth factor on the induction of human embryonic stem cell differentiation into neural precursors by monolayer differentiation, as Noggin accelerates and in- creases the differentiation of neural precursors.

关键词： neural regeneration stem cells basic fibroblast growth factor Noggin human embryonic stem cells neural precursors neural differentiation grants-supported paper neuroregeneration

Evaluation of the McGill‐Tongji Blended Education Program for Teacher Leaders in General Practice:The importance of partnership and contextualization in International Primary Care Training Initiatives

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Health Care Science

Health Care Science 2024年第4期3卷 238-248页

作者： Ziyue wang Xinxin Zhao Huixia Shen Hao wang Gemma Cheng Ya Ning Gao Wenzhen Zuo Zhuyin Xu Francesco Avallone Anish KArora manxi Guo Rachel Simmons David Lessard Theresa Beesley Jialin CZheng Bertrand Lebouché Howard Bergman Department of Family Medicine Faculty of Medicine and Health SciencesMcGill UniversityMontréalQuébecCanada School of Medicine Tongji UniversityShanghaiChina Department of General Practice Shanghai Tongji HospitalShanghaiChina Center for Outcome Research Evaluation Research Institute of the McGill University Health CentreMontrealQuébecCanada Office of Accreditation and Education Quality Improvement Faculty of Medicine and Health SciencesMcGill UniversityMontréalQuébecCanada Chronic Viral Illness Service Division of Infectious DiseasesDepartment of MedicineMcGill University Health CentreMontrealQuébecCanada

Purpose:Strong primary health care(PHC)systems require well‐established PHC education systems to enhance the skills of general practitioners(GPs).However,the literature on the experiences of international collaboration in primary care education in low‐and middle‐income countries remains *** purpose of this study was to evaluate the implementation and perceived impact of the McGill‐Tongji Blended Education Program for Teacher Leaders in General Practice(referred to as the“Tongji Program”).Methods:In 2020–2021,the McGill Department of Family Medicine(Montreal,Canada)and Tongji University School of Medicine(TUSM,Shanghai,China)jointly implemented the Tongji Program in Shanghai,China to improve the teaching capacity of PHC *** conducted an exploratory longitudinal case study with a mixed methods design for the ***(QUAN)data was collected through questionnaire surveys and qualitative(QUAL)data was collected through focus group ***:The evaluation showed that learners in Tongji Program were primarily female GPs(21/22,95%)with less than 4 years of experience in teaching(16/22,73%).This program was considered a successful learning experience by most participants(19/22,86%)with higher order learning tasks such as critical thinking and problem‐*** also agreed that this program helped them feel more prepared to teach(21/22,95%),and developed a positive attitude toward primary care(21/22,95%).The QUAL interview revealed that both the Tongji and McGill organizers noted that TUSM showed strong leadership in organization,education,and *** students and teachers agreed that by adapting training content into contextualized delivery formats and settings,the Tongji Program successfully overcame language and technology ***:Committed partnerships and contextualization were key to the success of the Tongji *** research should focus on how international primary care education programs affe

关键词： primary care general practice continuing professional development contextualization international partnership