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10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑Yu Tang xiang‑Biao Qiu Zhen Chen Mao‑Yuan zhao Chang‑Jun Ning Kai Pan Wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang Xiao‑Yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong huang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Gong Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑Yuan Luan Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan zhao‑Hui Song Kang Sun Zhi‑xin Tan Sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang zhao‑Hui Wang zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Cong Xia Yong‑Ji Yu Guo‑Hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Zhi‑Hao Zhou Ke‑Jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China China Academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China China Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the China Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification

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The Screening of Genes Sensitive to Long-Term, Low-Level Microwave Exposure and Bioinformatic Analysis of Potential Correlations to Learning and Memory

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Biomedical and Environmental Sciences 2015年第8期28卷 558-570页

作者： zhao Ya Li LI Ying xian MA Hong Bo LI dong LI Hai Liang JIANG Rui KAN Guang Han YANG Zhen zhong huang Zeng xin Astronaut Research and Training Center of China Beijing Institute of Radiation Medicine Southern Medical University

Objective To gain a better understanding of gene expression changes in the brain following microwave exposure in mice. This study hopes to reveal mechanisms contributing to microwave-induced learning and memory dysfunction. Methods Mice were exposed to whole body 2100 MHz microwaves with specific absorption rates (SARs) of 0.45 W/kg, 1.8 W/kg, and 3.6 W/kg for 1 hour daily for 8 weeks. Differentially expressing genes in the brains were screened using high-density oligonucleotide arrays, with genes showing more significant differences further confirmed by RT-PCR. Results The gene chip results demonstrated that 41 genes (0.45 W/kg group), 29 genes (1.8 W/kg group), and 219 genes (3.6 W/kg group) were differentially expressed. GO analysis revealed that these differentially expressed genes were primarily involved in metabolic processes, cellular metabolic processes, regulation of biological processes, macromolecular metabolic processes, biosynthetic processes, cellular protein metabolic processes, transport, developmental processes, cellular component organization, etc. KEGG pathway analysis showed that these genes are mainly involved in pathways related to ribosome, Alzheimer's disease, Parkinson's disease, long-term potentiation, Huntington's disease, and Neurotrophin signaling. Construction of a protein interaction network identified several important regulatory genes including synbindin (sbdn), Crystallin (CryaB), PPP1CA, Ywhaq, Psap, Psmb1, Pcbp2, etc., which play important roles in the processes of learning and memory. Conclusion Long-term, low-level microwave exposure may inhibit learning and memory by affecting protein and energy metabolic processes and signaling pathways relating to neurological functions or diseases.

关键词： Long-term Low-level Microwave Gene chip Learning and memory

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随机森林在气象网络入侵检测中的应用

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自动化技术与应用 2024年第7期43卷 129-133页

作者：赵忠凯王祝先韩书新董洋关兴民黑龙江省气象数据中心黑龙江哈尔滨150030 黑龙江省生态气象中心黑龙江哈尔滨150030

随着气象业务信息化程度的加深,气象网络在数据传输、处理和共享方面的作用越来越重要。然而,这也使得气象系统网络面临更多的安全威胁。近些年机器学习和人工智能技术迅猛发展,为气象信息系统网络安全提供了新的解决方案。为此提出基... 详细信息

随着气象业务信息化程度的加深,气象网络在数据传输、处理和共享方面的作用越来越重要。然而,这也使得气象系统网络面临更多的安全威胁。近些年机器学习和人工智能技术迅猛发展,为气象信息系统网络安全提供了新的解决方案。为此提出基于随机森林算法的气象网络的入侵检测模型,并借助仿真实验验证模型的有效性。在仿真实验中讨论数据的预处理方法包括类别特征的独热编码,归一化以及样本不平衡的重采样技术。仿真实验表明随机森林在网络入侵检测准确率和效率都要高于K近邻算法和决策树算法,为气象平台网络安全防护提供一种新思路和新模式。

关键词：入侵检测气象网络安全随机森林

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Postoperative adjuvant antiviral therapy for hepatitis B/C virus-related hepatocellular carcinoma:A meta-analysis

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World Journal of Gastroenterology 2010年第23期16卷 2931-2942页

作者： Miao, Ruo-Yu zhao, Hai-Tao Yang, Hua-Yu Mao, Yi-Lei Lu, xin zhao, Yi Liu, Chang-Ning zhong, Shou-xian Sang, xin-Ting huang, Jie-Fu Chinese Acad Med Sci Dept Liver Surg Peking Union Med Coll Hosp Beijing 100730 Peoples R China Peking Union Med Coll Beijing 100730 Peoples R China Chinese Acad Sci Bioinformat Res Grp Inst Comp Technol Beijing 100190 Peoples R China

AIM:To investigate the impact of postoperative antiviral treatment on tumor recurrence and survival of patients with chronic hepatitis B virus(HBV) or hepatitis C virus(HCV) infection-related primary hepatocellular carcinoma(HCC) after curative ***:We performed a meta-analysis of randomized and non-randomized control trials from electronic search and manual *** fixed effect model of Mantel-Haenszel method and the random effect model of Der Simonian and Laird method were used for homogeneous and heterogeneous studies,*** HCV-related studies,three HBV-related studies and three studies on HBV or HCV-related HCC were ***:A total of 1224 patients were included in this *** estimated odds ratios(OR) for the 1-,2-,3-and 5-year recurrence were 0.54 [15.4% vs 24.1%,95% confidence interval(CI):0.32-0.89,P=0.02],0.42(36.9% vs 58.0%,95% CI:0.19-0.90,P=0.03),0.37(47.9% vs 63.8%,95% CI:0.19-0.71,P=0.003),and 0.32(66.7% vs 74.3%,95% CI:0.15-0.66,P=0.002),respectively;and the OR for the 1-,2-,3-,5-and 7-year mortality were 0.23(1.2% vs 9.1%,95% CI:0.07-0.71,P=0.01),0.31(6.4% vs 22.1%,95% CI:0.12-0.79,P=0.01),0.43(12.7% vs 20.8%,95% CI:0.21-0.89,P=0.02),0.42(25.1% vs 42.0%,95% CI:0.27-0.66,P=0.0002) and 0.28(31.9% vs 52.2%,95% CI:0.13-0.59,P=0.0008).CONCLUSION:This meta-analysis indicates the postoperative antiviral therapy,interferon in particular,may serve as a favorable alternative to reduce recurrence and mortality in patients with HBV/HCV related HCCs.

关键词： Antiviral therapy Hepatitis B virus Hepatitis C virus Hepatocellular carcinoma Recurrence Survival

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Superconductivity of Nd_(1.85)Ce_(0.15)CuO_(4-y) by Electrochemical Oxidation

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Chinese Physics Letters 2000年第8期17卷 601-602页

作者： CHEN Ling CHE GUANG-CAN LI Hong dong Cheng ZHOU Fang huang Yu-zhen zhao zhong-xian National Laboratory for Superconductivity Institute of PhysicsChinese Academy of SciencesBeijing 100080 National Laboratory for Solid State Ionics Institute of PhysicsChinese Academy of SciencesBeijing 100080

Superconductivity of n-type superconductor Nd_(1.85)Ce_(0.15)CuO_(4-y)(NCCO)by electrochemical oxidation is re ported for the first time and the cyclic voltammogram curve for NCCO as working electrode is *** vestigations indicate that after oxidation,superconductivity of NCCO is improved:Tc is raised from 20 K up to 26 K,the superconducting volume fraction is increased *** valence electronic states of oxygen and copper in NCCO are studied by x-ray photoelectron *** is found that the Cu-2_(ps/2)peak shifts to the higher binding energy side about 0.4 e V,which indicates that the valence-state of copper ions is risen up after *** results imply that hole-carriers exist in n-type superconductor.

关键词： spectroscopy. copper Oxidation

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Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang xiang‑Biao Qiu Jing‑Wen Li Wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan Kang Sun Jing‑Yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng Ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang Hong Yi‑Wei Hu Han‑Xiong huang Wei‑Hua Jia Hao‑Yu Jiang Wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling Kang Bo Li Chao Li Gong Li Jia‑Wen Li Xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑Yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren Xi‑Chao Ruan zhao‑Hui Song Zhi‑xin Tan Sheng‑Da Tang Peng‑Cheng Wang zhao‑Hui Wang zhong‑Wei Wen Xiao‑Guang Wu Xuan Wu Li‑Kun Xie Yi‑Wei Yang Han Yi Yong‑Ji Yu Guo‑Hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑Wei Zhang xian‑Peng Zhang Yu‑Liang Zhang Yue Zhang Zhi‑Yong Zhang Mao‑Yuan zhao Lu‑Ping Zhou Zhi‑Hao Zhou Ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

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转录因子GhWRKY41促进水杨酸合成增强棉花对黄萎病菌的抗性

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作物学报 2024年第10期50卷 2447-2457页

作者：肖胜华董贤镘彭鑫李安子闭兆福廖铭静黄礼豪管倩倩胡琴朱龙付广西大学农学院/亚热带农业生物资源保护与利用国家重点实验室广西南宁530004 华中农业大学/作物遗传改良国家重点实验室湖北武汉430070 华中农业大学/湖北洪山实验室湖北武汉430070

棉花是我国最重要的经济作物之一,但其产量和品质受黄萎病菌危害而大幅度下降。挖掘棉花黄萎病抗性相关基因并解析其分子机制,对加快棉花抗黄萎病育种进程具有重要意义。前期研究鉴定到一个在多个抗病棉花品种中均受黄萎病菌诱导显著上... 详细信息

棉花是我国最重要的经济作物之一,但其产量和品质受黄萎病菌危害而大幅度下降。挖掘棉花黄萎病抗性相关基因并解析其分子机制,对加快棉花抗黄萎病育种进程具有重要意义。前期研究鉴定到一个在多个抗病棉花品种中均受黄萎病菌诱导显著上调表达的WRKY基因GhWRKY41,该基因通过激活苯丙烷代谢增强棉花对黄萎病菌的抗性。本研究进一步分析了GhWRKY41在不同激素处理下的诱导表达模式,利用病毒介导的基因沉默(VIGS)技术验证了GhWRKY41的抗病功能,并利用前期已创制的GhWRKY41转基因棉花株系‘Jin668’测定了其内源植物抗病激素含量。结果显示,GhWRKY41受水杨酸(SA)、Me-JA和H_(2)O_(2)诱导均显著上调表达;GhWRKY41被沉默后可削弱棉花对黄萎病菌的抗性;SA含量在GhWRKY41超表达棉花中显著增加,而在GhWRKY41干涉棉花中则明显减少。RT-qPCR分析显示,SA合成基因GhSID2及SA信号转导基因GhNPR1、GhPR1、GhPR5的表达水平在超表达植株中明显上调,而在干涉植株中则显著下降。ChIP-qPCR和双荧光素酶报告基因试验结果表明,GhWRKY41可结合并激活GhSID2、GhPR1和GhPR5的表达。此外,外施SA可明显提高棉花的黄萎病抗性。综上表明,GhWRKY41可通过促进棉花中内源植物激素SA的合成来增强植株的黄萎病抗性,这一结果完善了GhWRKY41在棉花抵御黄萎病菌过程中的生物学功能,为未来利用黄萎病抗性基因创制棉花抗病材料提供了理论基础。

关键词：棉花黄萎病菌 GhWRKY41 水杨酸

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Chromosome painting of telomeric repeats reveals new evidence for genome evolution in peanut

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Journal of Integrative Agriculture 2016年第11期15卷 2488-2496页

作者： DU Pei LI Li-na ZHANG zhong-xin LIU Hua QIN Li huang Bing-yan dong Wen-zhao TANG Feng-shou QI Zeng-jun ZHANG xin-you State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Industrial Crops Research Institute Henan Academy of Agricultural Sciences/Key Laboratory of Oil Crops in Huang-Huai-Hai PlainsMinistry of Agriculture/Henan Provincial Key Laboratory for Oil Crops Improvement College of Agriculture Henan University of Science and Technology

Interspecific hybridization is an important approach to improve cultivated peanut varieties. Cytological markers such as tandem repeats will facilitate alien gene introgression in peanut. Telomeric repeats have also been frequently used in chromosome research. Most plant telomeric repeats are（TTTAGGG）n that are mainly distributed at the chromosome ends, although interstitial telomeric repeats（ITRs） are also commonly identified. In this study, the telomeric repeat was chromosomally localized in 10 Arachis species through sequential GISH（genomic in situ hybridization） and FISH（fluorescence in situ hybridization） combined with 4＇,6-diamidino-2-phenylindole（DAPI） staining. Six ITRs were identified such as in the centromeric region of chromosome Bi5 in Arachis ipa？nsis, pericentromeric regions of chromosomes As5 in A. stenosperma, Bho7 in A. hoehnei and Av5 in A. villosa, nucleolar organizer regions of chromosomes As3 in A. stenosperma and Adi3 in A. diogoi, subtelomeric regions of chromosomes Bho9 in A. hoehnei and Adu7 in A. duranensis, and telomeric region of chromosome Es7 in A. stenophylla. The distributions of the telomeric repeat, 5S r DNA, 45 S r DNA and DAPI staining pattern provided not only ways of distinguishing different chromosomes, but also karyotypes with a higher resolution that could be used in evolutionary genome research. The distribution of telomeric repeats, 5S r DNA and 45 S r DNA sites in this study, along with inversions detected on the long arms of chromosomes Kb10 and Bho10, indicated frequent chromosomal rearrangements during evolution of Arachis species.

关键词： Arachis species inversion interstitial telomeric repeats karyotype

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Association of cardiovascular diseases with milk intake among general Chinese adults

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Chinese Medical Journal 2020年第10期133卷 1144-1154页

作者： xin-Yan Wang Fang-Chao Liu Xue-Li Yang Jian-xin Li Jie Gao xiang-Feng Lu Jian-Feng huang Ying Li Ji-Chun Chen Lian-Cheng zhao Chong Shen dong-Sheng Hu Ying-xin zhao Ling Yu Xiao-Qing Liu xian-Ping Wu dong-Feng Gu Key Laboratory of Cardiovascular Epidemiology Chinese Academy of Medical SciencesBeijing 100037China Department of Epidemiology Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Department of Epidemiology and Biostatistics School of Public HealthNanjing Medical UniversityNanjingJiangsu 211166China Department of Epidemiology and Health Statistics College of Public HealthZhengzhou UniversityZhengzhouHenan 450001China Department of Biostatistics and Epidemiology School of Public HealthShenzhen University Health Science CenterShenzhenGuangdong 518071China Shandong First Medical University JinanShandong 271000China Department of Cardiology Fujian Provincial People's HospitalFuzhouFujian 350004China Division of Epidemiology Guangdong Provincial People's Hospital and Cardiovascular InstituteGuangzhouGuangdong 510080China Sichuan Center for Disease Control and Prevention ChengduSichuan 610041China School of Medicine Southern University of Science and TechnologyShenzhenGuangdong 518055China.

Background:The association of milk intake with cardiovascular disease(CVD)and cause-specific mortality remained controversial and evidence among the Chinese population was *** aimed to study the relationship between milk intake and CVDs among general Chinese ***::A total of 104,957 participants received questionnaire *** of physical examination such as anthropometric measurements and biochemical tests during 2007 to 2008,demographic data and their information on milk intake were collected through standardized *** proportional hazard regression models were used to calculate hazard ratios(HRs)and their corresponding 95%confidence intervals(CIs)of CVD incidence,cause-specific mortality and all-cause mortality related to milk *** cubic splines(RCSs)were applied to examine dose-response ***::Among the 91,757 participants with a median follow-up period of 5.8 years,we documented 3877 CVD cases and 4091 all-cause *** with participants who never consumed milk,the multivariate-adjusted HRs(95%CIs)of CVD incidence for 1 to 150 g/day,151 to 299 g/day,and≥300 g/day were 0.94(0.86-1.03)(P>0.05),0.77(0.66-0.89)(P<0.05),and 0.59(0.40-0.89)(P<0.05),respectively;each 100 g increase of daily milk intake was associated with 11%lower risk of CVD incidence(HR,0.89;95%CI:0.85-0.94;P<0.001),and 11%lower risk of CVD mortality(HR,0.89;95%CI:0.82-0.97;P=0.008)after adjustment for age,sex,residential area,geographic region,education level,family history of CVD,smoking,alcohol drinking,physical activity level,body mass index,and healthy diet status(ideal or not).RCS analyses also showed a linear dose-response relationship with CVD(P for overall significance of the curve<0.001;P for non-linearity=0.979;P for linearity<0.001)and stroke(P for overall significance of the curve=0.010;P for non-linearity=0.998;P for linearity=0.002)incidence,and CVD mortality(P for overall significance of the curve=0.045;P for non

关键词： Milk Cardiovascular disease Incidence All-cause mortality Cause-specific mortality Prospective study Chinese population

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Biological nano agent produced by hypoxic preconditioning stem cell for stroke treatment

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Nano Research 2023年第5期16卷 7413-7421页

作者： xin-Chi Jiang Hong-Hui Wu Tianyuan Zhang Yun-Fei dong Yao-Sheng Li Ting huang An-Hao Tian Peng-xiang Chen xian-Ming Lin Ying-Zhi huang Chong Liu xiang-Nan Zhang zhong Chen Yasuhiko Tabata Jian-Qing Gao Institute of Pharmaceutics College of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China Dr.Li Dak Sum&Yip Yio Chin Center for Stem Cell and Regenerative Medicine Zhejiang UniversityHangzhou 310058China Department of Pathology and Pathophysiology and Department of Neurosurgery of the Second Affiliated Hospital Zhejiang University School of MedicineHangzhou 310058China The Third Affiliated Hospital of Zhejiang Chinese Medical University Hangzhou 310058China SinoCell Biotechnology Ltd. Ningbo 315000China Key Laboratory of Medical Neurobiology of the Ministry of Health of China Institute of Pharmacology&ToxicologyCollege of Pharmaceutical SciencesZhejiang UniversityHangzhou 310058China Laboratory of Biomaterials Department of Regeneration Science and EngineeringInstitute for Frontier Life and Medical SciencesKyoto UniversityKyoto 606-8501Japan

Exosomes make a significant contribution during stem cell-based therapy due to the abundant *** evidence implies exosomes can act as potential biological nano *** herein propose hypoxic preconditioning for neural stem cells(NSCs)that could produce hypoxic exosomes for efficient treatment of ischemic *** preconditioning on NSCs significantly altered the miRNAs encapsulated in ***,hypoxic exosomes could target the injured brain to regulate the microenvironment to inhibit neuroinflammation and promote blood–brain barrier permeability ***,the autologous NSCs in Nestin-CreER mice could be activated by hypoxic exosomes to facilitate nerve *** hypoxic preconditioning,exosomes further exerted therapeutic effects on both survival(25%)and behavioral outcomes in ischemic stroke ***,hypoxic preconditioning NSCs can produce effective nano agent and may represent a promising strategy for clinical neurorestorative therapy.

关键词： exosomes hypoxia-preconditioning stem cells ischemic stroke microenvironment

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