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Investigating College Students’ Diet and Physical Activity Behaviors Regarding Non-Communicable Diseases Prevention in China
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作者 Ling-Shen Hung Yueyuan Chen +2 位作者 Yuqi Huang Li-Ching Hung Meng-Te Hung 《Journal of Biosciences and Medicines》 CAS 2023年第2期302-310,共9页
We aimed to investigate if college students’ dietary and physical activity adhered to the Chinese Dietary Guidelines, the Composing Editorial Board of Physical Activity Guidelines, and WHO recommendation for NCDs pre... We aimed to investigate if college students’ dietary and physical activity adhered to the Chinese Dietary Guidelines, the Composing Editorial Board of Physical Activity Guidelines, and WHO recommendation for NCDs prevention. Methods: A 3-day (2 weekdays and 1 weekend day) 24-hour (24-HRs) dietary recall was conducted to record details of participants’ food consumption. One-way analysis of variance (ANOVA) was applied to examine the influence of the identified demographic variables (including BMI, gender, major, family monthly income, and place of household registration) on the 8 food groups’ consumption. We analyzed the effect of the various demographic variables on sodium intake by the student’s t-test. The questionnaire, International Physical Activity Questionnaire (IPAQ)-Short Form, was utilized to assess participants’ physical activity (PA) level. The Wilcoxon-Mann-Whitney was applied to analyze participants’ physical activity. Results: Our research indicated participants consumed much fewer fruits and vegetables and excessive meats on average for both males and females regarding NCDs prevention. Conclusion: Participants’ dietary intake did not comply with the Chinese Dietary Guide-lines recommendation for chronic diseases prevention. Nutrition knowledge and health education are needed for college students. . 展开更多
关键词 non-Communicable Diseases Dietary Behavior Physical activity College Students
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Research on semi-active control method of a building structure based on non-smooth control 被引量:2
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作者 Wang Qing Wang Jianhui Ma Kemao 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2019年第2期425-432,共8页
This study investigates the effectiveness of the non-smooth semi-active control algorithm on suppressing the vibration performance of a building structure subjected to seismic waves. According to the Lyapunov stabilit... This study investigates the effectiveness of the non-smooth semi-active control algorithm on suppressing the vibration performance of a building structure subjected to seismic waves. According to the Lyapunov stability theory, it has bene proven that the non-smooth semi-active control algorithm can achieve a finite-time stability of the vibration relative to the isolation layer of a building structure. Through numerical simulation of two buildings with different parameters subjected to the input of a seismic wave, the vibration conditions of passive control, LQR semi-active control and non-smooth semiactive control are compared and analyzed. The simulation results show that the non-smooth semi-active control algorithm has a better robustness and effectiveness in restraining the impact of earthquakes on the structure. 展开更多
关键词 building structure ISOLATION LAYER SEMI-active CONTROL non-SMOOTH CONTROL vibration
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Robust stability characterizations of active metamaterials with non-Foster loads
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作者 范逸风 孙永志 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第2期594-601,共8页
Active metamaterials incorporating with non-Foster elements have been considered as one of the means of overcoming inherent limitations of the passive counterparts, thus achieving broadband or gain metamaterials. Howe... Active metamaterials incorporating with non-Foster elements have been considered as one of the means of overcoming inherent limitations of the passive counterparts, thus achieving broadband or gain metamaterials. However, realistic active metamaterials, especially non-Foster loaded medium, would face the challenge of the possibility of instability. Moreover,they normally appear to be time-variant and in unsteady states, which leads to the necessity of a stability method to cope with the stability issue considering the system model uncertainty. In this paper, we propose an immittance-based stability method to design a non-Foster loaded metamaterial ensuring robust stability. First, the principle of this stability method is introduced after comparing different stability criteria. Based on the equivalent system model, the stability characterization is used to give the design specifications to achieve an active metamaterial with robust stability. Finally, it is applied to the practical design of active metamaterial with non-Foster loaded loop arrays. By introducing the disturbance into the nonFoster circuit(NFC), the worst-case model uncertainty is considered during the design, and the reliability of our proposed method is verified. This method can also be applied to other realistic design of active metamaterials. 展开更多
关键词 active metamaterials stability analysis non-Foster circuit(NFC)
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Comparative Study of Linear and Non-Linear Controls of Three-Phase Shunt Active Filters for Improving the Quality of Electrical Energy
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作者 Mamane Adamou Nabil Alkassoum +1 位作者 André Foulani Amadou Seidou Maiga 《Energy and Power Engineering》 2019年第3期149-166,共18页
The aim of this work is to comparatively study two types of control of a three-phase shunt active filter (TSAF) in order to realize a system of depollution of electrical networks so as to improve the quality of electr... The aim of this work is to comparatively study two types of control of a three-phase shunt active filter (TSAF) in order to realize a system of depollution of electrical networks so as to improve the quality of electrical energy. We used two TSA control models which differ in the method of disturbed currents detection, one linear and the other non-linear. The results show that the non-linear control method, although with high calculation blocks, gives more promising results than the linear control method. When connecting a non-linear load (televisions, lamps, variable speed drives, etc.) directly to the public distribution network, the non-linear nature of the load causes the source current to be deformed due to the presence of harmonic currents and voltages. These harmonics thus generate a high reactive power, and therefore considerable electrical losses in the network. One of the solutions to reduce losses on the electricity grid is to incorporate an electronic circuit called a filter into the electricity grid. This work carried out a comparative study of two types of control of a three-phase shunt active filter (TSAF) in order to carry out a system for cleaning up electricity networks in order to improve the quality of electrical energy. We used two TSA control models that differ in the method of detecting disturbed currents, one linear and the other non-linear. The results show that the non-linear control method, although with high calculation blocks, gives better results than the linear control method. 展开更多
关键词 Power QUALITY active THREE-PHASE SHUNT Filter non-LINEAR CONTROL LINEAR CONTROL
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miR-217靶向调控ERK2表达对非小细胞肺癌细胞活性和免疫逃逸的影响及机制研究
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作者 陈丽萍 冯平 +5 位作者 林卫佳 项保利 赵建清 籍强 陈艳红 史永兴 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第9期1895-1901,共7页
目的:研究miR-217靶向调控细胞外信号调节激酶2(ERK2)表达对非小细胞肺癌(NSCLC)细胞活性和免疫逃逸的影响及作用机制。方法:qRT-PCR检测miR-217与ERK2 mRNA在NSCLC组织、癌旁组织及HLF-1、A549、HCC827细胞株中的表达量,分析不同miR-21... 目的:研究miR-217靶向调控细胞外信号调节激酶2(ERK2)表达对非小细胞肺癌(NSCLC)细胞活性和免疫逃逸的影响及作用机制。方法:qRT-PCR检测miR-217与ERK2 mRNA在NSCLC组织、癌旁组织及HLF-1、A549、HCC827细胞株中的表达量,分析不同miR-217表达量NSCLC患者的预后生存状态。使用生物信息学、双荧光素酶基因报告实验分析miR-217与ERK2的靶向关系。培养NSCLC A549细胞,分为NC组、miR-217 inhibitor组、miR-217 mimic组、miR-217 mimic+ERK2NC组、miR-217 mimic+ERK2组,除NC组不做任何处理外,其余各组均转染对应质粒,分析各组A549细胞增殖活性、免疫逃逸状况,并明确作用机制。结果:与癌旁组织比较,NSCLC组织miR-217表达量降低,ERK2 mRNA表达量升高(P<0.05)。与肺成纤维细胞HLF-1细胞株比较,NSCLC细胞A549、HCC827细胞株miR-217表达量降低,ERK2 mRNA表达量升高(P<0.05)。基于Kaplan-Meier Plotter数据库分析miR-217与NSCLC患者预后的关系,结果表明miR-217低表达与患者预后不良有关(HR=0.90,P=0.033)。双荧光素报告基因显示miR-217与ERK2之间的3'UTR区域间存在匹配序列,miR-217 mimic片段可抑制ERK2-WT信号,但对ERK2-MUT无影响。与NC组比较,miR-217 inhibitor组细胞增殖活性、PD-L1、PD-L2 mRNA表达量升高,CD8+T细胞活力降低,miR-217 mimic组细胞增殖活性、PD-L1、PD-L2 mRNA表达量降低,CD8+T细胞活力升高(P<0.05)。与miR-217 mimic组比较,miR-217 mimic+ERK2 NC组细胞增殖活性、CD8+T细胞活力、PD-L1、PD-L2 mRNA表达量无明显改变(P>0.05),miR-217 mimic+ERK2组细胞增殖活性、PD-L1、PD-L2 mRNA表达量升高,CD8+T细胞活力降低(P<0.05)。结论:miR-217过表达可降低NSCLC细胞A549活性,抑制PD-L1表达,激活肿瘤微环境中的CD8+T细胞,进而抑制免疫逃逸,其可能通过靶向调控ERK2发挥作用。 展开更多
关键词 微小RNA-217 非小细胞肺癌 细胞增殖活性 免疫逃逸 细胞程序性死亡配体1 细胞外信号调节激酶2
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清肝降脂汤对体外诱导非酒精性脂肪肝细胞模型脂代谢和过氧化物酶体增殖物激活受体-α的调节作用研究
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作者 杨帆 魏小果 +2 位作者 李娟 何昉 李昌金 《陕西中医》 CAS 2024年第10期1326-1329,1335,共5页
目的:探讨清肝降脂汤对体外诱导非酒精性脂肪肝(NAFLD)细胞模型脂代谢和过氧化物酶体增殖物激活受体(PPAR)-α的调节作用。方法:取HepG2细胞株,采用油酸构建NAFLD细胞模型。将细胞分为正常对照组(无油酸建模+无药物处理)、模型对照组(... 目的:探讨清肝降脂汤对体外诱导非酒精性脂肪肝(NAFLD)细胞模型脂代谢和过氧化物酶体增殖物激活受体(PPAR)-α的调节作用。方法:取HepG2细胞株,采用油酸构建NAFLD细胞模型。将细胞分为正常对照组(无油酸建模+无药物处理)、模型对照组(有油酸建模+无药物处理)和清肝降脂汤组(有油酸建模+有药物处理)。采用CCK-8实验检测细胞活性。采用油红O染色定性定量检测清肝降脂汤对细胞内脂质的影响,定量计算脂质含量的抑制率。同时,测定细胞内丙二醛(MDA)、超氧化物歧化酶(SOD)、甘油三酯(TG)、总胆固醇(TC)和游离脂肪酸(FFA)含量;并采用聚合酶链反应(PCR)和Western blot检测脂肪代谢标志物PPAR-α和成纤维细胞生长因子-21(FGF21)的表达水平。结果:与正常对照组相比,模型对照组的HepG2细胞活性显著增高,脂质含量显著增高,MDA、SOD、TG、TC和FFA含量显著增高,而PPAR-α和FGF21表达水平显著降低(均P<0.05);而与模型对照组相比,清肝降脂汤组的HepG2细胞活性显著降低,脂质含量显著降低,MDA、SOD、TG、TC和FFA含量显著降低,而PPAR-α和FGF21表达水平显著增高(均P<0.05)。结论:清肝降脂汤有助于降低HepG2细胞活性、脂质含量以及MDA、SOD、TG、TC和FFA含量,并促进PPAR-α和FGF21表达,进而调节脂质代谢,抑制NAFLD发展进程。 展开更多
关键词 非酒精性脂肪肝 清肝降脂汤 过氧化物酶体增殖物激活受体 细胞模型 脂代谢 成纤维细胞生长因子-21
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基于NOMA-OFDM的雷达通信一体化波形设计
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作者 李风从 王子墨 +2 位作者 仝方遒 冯翔 赵宜楠 《现代雷达》 CSCD 北大核心 2024年第8期14-21,共8页
针对基于正交频分复用的雷达通信一体化波形设计中,通信信息的随机性会影响雷达性能以及过高峰均包络比(PAPR)可能导致信号在射频端出现严重失真的问题,文中提出了利用非正交多址将雷达信号与通信信号在功率域中分开,以降低通信信息随... 针对基于正交频分复用的雷达通信一体化波形设计中,通信信息的随机性会影响雷达性能以及过高峰均包络比(PAPR)可能导致信号在射频端出现严重失真的问题,文中提出了利用非正交多址将雷达信号与通信信号在功率域中分开,以降低通信信息随机性对雷达性能的影响,并利用主动星座图扩展(ACE)对叠加信号进行PAPR抑制的波形设计方法。首先,分析了传统功率分配原则导致叠加星座出现混叠的原因,并给出在不同调制阶数的最佳功率分配;其次,从理论上分析了ACE技术对叠加信号进行PAPR抑制的可行性;最后,仿真结果表明,在不同调制方式和不同信噪比下,当功率分配最佳时能同时达成雷达信号高检测率和通信符号最低误码率。ACE技术的使用同时保证了优良的雷达性能和通信端的低误码率,对叠加信号的PAPR有较好的抑制效果。 展开更多
关键词 雷达通信一体化 非正交多址 功率分配 峰均包络比 主动星座图扩展
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血清AMPK-αmRNA、Caspase-6 mRNA水平对非酒精性脂肪肝疗效的预测价值及影响因素分析
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作者 刘春华 马丽敏 +1 位作者 刘凤华 刘英果 《新疆医科大学学报》 CAS 2024年第7期1001-1007,共7页
目的 分析血清腺苷酸活化蛋白激酶-αmRNA(Adenosine monophosphate activated protein kinase α,AMPK-αmRNA)、半胱氨酸天冬氨酸蛋白酶-6(Cystein-asparate protease,caspase-6) mRNA水平对非酒精性脂肪肝(Non-alcoholic fatty liver... 目的 分析血清腺苷酸活化蛋白激酶-αmRNA(Adenosine monophosphate activated protein kinase α,AMPK-αmRNA)、半胱氨酸天冬氨酸蛋白酶-6(Cystein-asparate protease,caspase-6) mRNA水平对非酒精性脂肪肝(Non-alcoholic fatty liver disease,NAFLD)疗效的预测价值及影响因素。方法 选取2021年10月-2023年8月聊城市人民医院感染性疾病科收治的188例NAFLD患者为研究对象,治疗6个月后以甘油三酯(TG)降低≥20%和(或)总胆固醇(TC)降低≥10%判断为治疗有效,归入有效组,否则判断为治疗无效,归入无效组。所有患者治疗前后检测血清AMPK-αmRNA、Caspase-6 mRNA水平。收集NAFLD患者一般资料,分析NAFLD疗效的影响因素。绘制受试者工作特征(Receiver operating characteristic curve,ROC)曲线分析血清AMPK-αmRNA,Caspase-6 mRNA水平对NAFLD疗效的预测价值。结果 188例NAFLD患者治疗6个月脱落6例,有效随访182例,其中治疗有效126例(69.23%),纳入有效组,治疗无效56例(30.77%),纳入无效组。与本组治疗前比较,治疗6个月后患者血清AMPK-αmRNA水平升高,Caspase-6 mRNA水平降低,差异有统计学意义(P<0.05)。与无效组比较,有效组治疗前、治疗6个月血清AMPK-αmRNA水平升高,Caspase-6 mRNA水平降低,差异有统计学意义(P<0.05)。患有糖尿病,血清TC、TG、低密度脂蛋白胆固醇(Low-density lipoprotein,LDL-C)、谷丙转氨酶(Alanime aminotransferase,ALT)、谷草转氨酶(Aspartate aminotransferase,AST),Caspase-6 mRNA水平是NAFLD疗效的独立危险因素,治疗前血清AMPK-αmRNA水平是其独立保护因素(P<0.05)。建立Logistic回归模型:logit(P)=-29.182-0.867×AMPK-αmRNA+0.890×Caspase-6 mRNA+1.956×糖尿病+1.283×TG+0.982×TC+0.703×LDL-C+0.066×ALT+0.101×AST,拟合度较好。治疗前血清AMPK-αmRNA、Caspase-6 mRNA水平及Logistic回归模型预测NAFLD疗效的曲线下面积(Area under curve,AUC)值分别为0.757、0.717、0.816,Logistic回归模型的预测价值大于AMPK-αmRNA,Caspase-6 mRNA单独评估价值(Z=2.149,P=0.032;Z=2.879,P=0.004)。结论 患者是否患有糖尿病,血清TG、TC、LDL-C、ALT、AST、AMPK-αmRNA、Caspase-6 mRNA水平是NAFLD疗效的影响因素,检测血清AMPK-αmRNA、Caspase-6 mRNA水平对NAFLD疗效具有一定预测价值。 展开更多
关键词 非酒精性脂肪肝 影响因素 腺苷酸活化蛋白激酶-α 微小核糖核酸 半胱氨酸天冬氨酸蛋白酶-6
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A Pair of New Spirocyclic Alkaloid Enantiomers with TrxR Inhibitory Activities Were Isolated from Marine-Derived Aspergillus ruber TX-M4-1 被引量:1
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作者 WANG Cong WANG Yufei +4 位作者 SUN Jian WANG Shiyi DU Weisheng ZHOU Liman KONG Fandong 《Journal of Ocean University of China》 SCIE CAS CSCD 2023年第6期1677-1682,共6页
One new spirocyclic alkaloid,5-isopentenyl-cryptoechinuline D(1),along with 11 known compounds(2–12),were iso-lated from a marine fungus Aspergillus ruber TX-M4-1.The structures of compounds 1–12 were elucidated by ... One new spirocyclic alkaloid,5-isopentenyl-cryptoechinuline D(1),along with 11 known compounds(2–12),were iso-lated from a marine fungus Aspergillus ruber TX-M4-1.The structures of compounds 1–12 were elucidated by spectroscopic evi-dences.Compound 1 was initially isolated as an enantiomer,and further separation of 1 by chiral HPLC afforded a pair of enantio-mers,including(-)-5-isopentenyl-cryptoechinuline D(1a)and(+)-5-isopentenyl-cryptoechinuline D(1b).Their absolute configura-tions were elucidated by ECD spectroscopic data.Compounds 1a,5 and 10 could inhibit thioredoxin reductase(TrxR)activity with IC50 values of 6.2,36.3 and 18.6μmol L^(-1),respectively.Surface plasmon resonance(SPR)study also demonsrated the interactions between compounds 6,8 and Niemann-Pick C1 Like 1(NPC1L1)respectively,which indicate that compounds 6 and 8 are potential NPC1L1 inhibitors. 展开更多
关键词 Aspergillus ruber TX-M4-1 spirocyclic alkaloid TrxR inhibitory activity
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Kruppel样因子14介导的JAK-STAT信号通路对非小细胞肺癌预后的影响 被引量:1
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作者 王鹏 姚苏梅 +1 位作者 吕学东 陈金亮 《实用医学杂志》 CAS 北大核心 2024年第1期25-31,共7页
目的探讨Kruppel样因子14(KLF14)介导的Janus激酶-信号转导子与转录激活子(JAKSTAT)信号通路对非小细胞肺癌(NSCLC)预后的影响。方法收集2018年1月至2019年9月本院手术切除的80例NSCLC组织和25例癌旁非肿瘤组织。患者随访至2023年4月结... 目的探讨Kruppel样因子14(KLF14)介导的Janus激酶-信号转导子与转录激活子(JAKSTAT)信号通路对非小细胞肺癌(NSCLC)预后的影响。方法收集2018年1月至2019年9月本院手术切除的80例NSCLC组织和25例癌旁非肿瘤组织。患者随访至2023年4月结束。采用免疫组织化学检测组织中KLF14表达,根据KLF14表达的中值水平将患者分为高表达组和低表达组。通过在A549细胞中转染KLF14、JAK1过表达质粒和在HCC827细胞中转染KLF14、JAK1特异性短发夹RNA(shKLF14、shJAK1)来过表达或敲低KLF14、JAK1。采用细胞克隆形成试验分析细胞的增殖活力。Transwell分析细胞的迁移、侵袭情况。结果与癌旁正常组织相比,KLF14在NSCLC组织中表达降低(P<0.001)。KLF14的低表达与肿瘤直径>3 cm、淋巴结转移、临床分期Ⅲ期显著相关(P<0.05)。在高KLF14表达组和低KLF14表达组之间的总存活率有显著差异,低KLF14表达的患者预后不良(P<0.05)。KLF14过表达后,A549细胞的增殖能力、迁移和侵袭细胞数均显著降低(P<0.05),而KLF14敲低后,HCC827细胞的增殖能力、迁移和侵袭细胞数均显著增加(P<0.05)。与Vector+KLF14组相比,JAK1+KLF14组A549细胞的集落数、迁移和侵袭数显著增加(P<0.05);而与shNC+shKLF14组相比,shJAK1+shKLF14组HCC827细胞的集落数、迁移和侵袭数显著降低(P<0.05)。结论KLF14低表达与NSCLC患者较差的总生存期相关。KLF14上调显著抑制肺癌细胞在体外的增殖、转移能力,其作用机制可能与抑制JAK-STAT信号通路有关。 展开更多
关键词 Kruppel样因子14 Janus激酶-信号转导子与转录激活子 非小细胞肺癌 预后
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18β-glycyrrhetinic acid promotes gastric cancer cell autophagy and inhibits proliferation by regulating miR-328-3p/signal transducer and activator of transcription 3
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作者 Yi Yang Yi Nan +7 位作者 Yu-Hua Du Shi-Cong Huang Dou-Dou Lu Jun-Fei Zhang Xia Li Yan Chen Lei Zhang Ling Yuan 《World Journal of Gastroenterology》 SCIE CAS 2023年第27期4317-4333,共17页
BACKGROUND Gastric cancer(GC)is one of the most common cancer types worldwide,and its prevention and treatment methods have garnered much attention.As the active ingredient of licorice,18β-glycyrrhetinic acid(18β-GR... BACKGROUND Gastric cancer(GC)is one of the most common cancer types worldwide,and its prevention and treatment methods have garnered much attention.As the active ingredient of licorice,18β-glycyrrhetinic acid(18β-GRA)has a variety of pharmacological effects.The aim of this study was to explore the effective target of 18β-GRA in the treatment of GC,in order to provide effective ideas for the clinical prevention and treatment of GC.AIM To investigate the mechanism of 18β-GRA in inhibiting cell proliferation and promoting autophagy flux in GC cells.METHODS Whole transcriptomic analyses were used to analyze and screen differentially expressed microRNAs(miRNAs)in GC cells after 18β-GRA intervention.Lentivirus-transfected GC cells and the Cell Counting Kit-8 were used to detect cell proliferation ability,cell colony formation ability was detected by the clone formation assay,and flow cytometry was used to detect the cell cycle and apoptosis.A nude mouse transplantation tumor model of GC cells was constructed to verify the effect of miR-328-3p overexpression on the tumorigenicity of GC cells.Tumor tissue morphology was observed by hematoxylin and eosin staining,and microtubule-associated protein light chain 3(LC3)expression was detected by immunohistochemistry.TransmiR,STRING,and miRWalk databases were used to predict the relationship between miR-328-3p and signal transducer and activator of transcription 3(STAT3)-related information.Expression of STAT3 mRNA and miR-328-3p was detected by quantitative polymerase chain reaction(qPCR)and the expression levels of STAT3,phosphorylated STAT3(p-STAT3),and LC3 were detected by western blot analysis.The targeted relationship between miR-328-3p and STAT3 was detected using the dual-luciferase reporter gene system.AGS cells were infected with monomeric red fluorescent protein-green fluorescent protein-LC3 adenovirus double label.LC3 was labeled and autophagy flow was observed under a confocal laser microscope.RESULTS The expression of miR-328-3p was significantly upregulated after 18β-GRA intervention in AGS cells(P=4.51E-06).Overexpression of miR-328-3p inhibited GC cell proliferation and colony formation ability,arrested the cell cycle in the G0/G1 phase,promoted cell apoptosis,and inhibited the growth of subcutaneous tumors in BALB/c nude mice(P<0.01).No obvious necrosis was observed in the tumor tissue in the negative control group(no drug intervention or lentivirus transfection)and vector group(the blank vector for lentivirus transfection),and more cells were loose and necrotic in the miR-328-3p group.Bioinformatics tools predicted that miR-328-3p has a targeting relationship with STAT3,and STAT3 was closely related to autophagy markers such as p62.After overexpressing miR-328-3p,the expression level of STAT3 mRNA was significantly decreased(P<0.01)and p-STAT3 was downregulated(P<0.05).The dual-luciferase reporter gene assay showed that the luciferase activity of miR-328-3p and STAT33’untranslated regions of the wild-type reporter vector group was significantly decreased(P<0.001).Overexpressed miR-328-3p combined with bafilomycin A1(Baf A1)was used to detect the expression of LC3 II.Compared with the vector group,the expression level of LC3 II in the overexpressed miR-328-3p group was downregulated(P<0.05),and compared with the Baf A1 group,the expression level of LC3 II in the overexpressed miR-328-3p+Baf A1 group was upregulated(P<0.01).The expression of LC3 II was detected after intervention of 18β-GRA in GC cells,and the results were consistent with the results of miR-328-3p overexpression(P<0.05).Additional studies showed that 18β-GRA promoted autophagy flow by promoting autophagosome synthesis(P<0.001).qPCR showed that the expression of STAT3 mRNA was downregulated after drug intervention(P<0.05).Western blot analysis showed that the expression levels of STAT3 and p-STAT3 were significantly downregulated after drug intervention(P<0.05).CONCLUSION 18β-GRA promotes the synthesis of autophagosomes and inhibits GC cell proliferation by regulating the miR-328-3p/STAT3 signaling pathway. 展开更多
关键词 18β-glycyrrhetinic acid miR-328-3p Signal transducer and activator of transcription 3 Cell proliferation Autophagy flow
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负载型Fe-Ni纳米合金的制备及其催化丁二烯选择性加氢性能
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作者 严永情 王朝 +5 位作者 刘思明 连天 王伟豪 金顺敬 陈丽华 苏宝连 《石油学报(石油加工)》 EI CAS CSCD 北大核心 2024年第1期83-92,共10页
采用尿素沉积-沉淀法制备了负载型Fe-Ni纳米合金催化剂,通过调变Fe/Ni摩尔比,研究了金属组分对其还原温度、合金结构及催化丁二烯选择性加氢性能的影响。结果表明:Fe-Ni复合能有效降低Fe、Ni单金属催化剂的还原温度;随着Fe摩尔分数由0... 采用尿素沉积-沉淀法制备了负载型Fe-Ni纳米合金催化剂,通过调变Fe/Ni摩尔比,研究了金属组分对其还原温度、合金结构及催化丁二烯选择性加氢性能的影响。结果表明:Fe-Ni复合能有效降低Fe、Ni单金属催化剂的还原温度;随着Fe摩尔分数由0增加至100%,金属相结构逐渐由面心立方向体心立方结构转变;在催化加氢过程中,Fe的引入降低了Ni基催化剂活性,但丁烯选择性得到大幅提高;当Fe/Ni摩尔比为25/75时,Fe_(25)Ni_(75)/TiO_(2)-R催化剂中富Ni的Ni3Fe相在丁二烯催化活性(完全转化温度T_(100%)约95℃)和单烯烃选择性(>93%)最佳。 展开更多
关键词 非贵金属催化剂 Fe-Ni合金催化剂 丁二烯 选择性加氢 低碳烯烃 活性位点
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Non-UV germicidal activity of fresh TiO_2 and Ag/TiO_2 被引量:3
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作者 LIU Lifen John Barford YEUNG King Lun 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2009年第5期700-706,共7页
Fresh TiO2 was found to possess a strong germicidal activity even without UV irradiation. Live Yeast (Saccharomyces cerevisiae) cells in contact with fresh TiO2 were found deformed and dead after 15min contact. The ... Fresh TiO2 was found to possess a strong germicidal activity even without UV irradiation. Live Yeast (Saccharomyces cerevisiae) cells in contact with fresh TiO2 were found deformed and dead after 15min contact. The cause of germicidal activity was discussed from the observed cell deformation, lysis and increased absorption at 1680 cm^-1 in FT-IR spectra of the affected cells, which proved the oxidizing effect of fresh TiO2 to cells. The deformation caused by the stretching of cell wail and pressure built-up inside the cell, led to cell burst and release of intracellular materials. The degree of cell deformation was found positively related with the wetting property of TiO2. Cells are negatively charged, for Gram-negative cell (thinner ceil wail), a higher germicidal effect was observed than Gram-positive cells. The germicidal effect of TiO2 gradually decreased after exposure to air at room temperature, as the wetting property decreased. This kind of germicidal activity was more effective compared to other germicidal process such as UVA/TiO2 or Ag+. This shed light on designing new germicidal material either maintained by visible light irradiation, or by oxidation effect generated by reactive oxygen species. 展开更多
关键词 germicidal activity titanium dioxide non-UV
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Active disturbance rejection control on first-order plant 被引量:21
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作者 Ruiguang Yang Mingwei Sun Zengqiang Chen 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2011年第1期95-102,共8页
Conventional PI control encounters some problems when dealing with large lag process in the presence of parameter uncertainties.For the typical first-order process,an observerbased linear active disturbance rejection ... Conventional PI control encounters some problems when dealing with large lag process in the presence of parameter uncertainties.For the typical first-order process,an observerbased linear active disturbance rejection control(LADRC) scheme is presented to cope with the difficulties,and a reduced-order observer scheme is proposed further.Some quantitative dynamic results with regard to non-overshoot characteristics are obtained.Finally,the performance boundaries of LADRC and PI control are explicitly compared with each other,which shows that the former is more superior in most cases. 展开更多
关键词 active disturbance rejection control(ADRC) first-order process dynamic performance non-overshoot.
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Synthesis, Crystal Structure and Antidepressant Activity of 5-[4-(Benzyloxy)phenyl]-9-(n-propyl)-4,6-dioxa-1-azabicyclo[3.3.1]nonane Hydrochloride 0.5Hydrate 被引量:1
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作者 付二霞 曹高 +1 位作者 石磊 胡艾希 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第5期709-713,共5页
The title compound 2(C22H28N+O3)·H2O·2Cl-was synthesized by the reaction of 2-bromo-1-[4-(benzyloxy)phenyl]-1-pentone with 2,2'-azanediyldiethanol. The crystal determined by X-ray diffraction analysis ... The title compound 2(C22H28N+O3)·H2O·2Cl-was synthesized by the reaction of 2-bromo-1-[4-(benzyloxy)phenyl]-1-pentone with 2,2'-azanediyldiethanol. The crystal determined by X-ray diffraction analysis belongs to the monoclinic system, space group Pc with a = 18.312(3), b = 14.838(3), c = 7.6227(14) , β = 97.981(4)°, Z = 2, Mr = 797.82, V = 2051.1(6) 3, Dc = 1.292 g/cm3, S = 0.956, μ = 0.21 mm-1, F(000) = 852, the final R = 0.0625 and wR = 0.1428 for 5683 observed reflections (Ⅰ 〉 2σ(Ⅰ)). Flack parameter is 0.10(9). The title compound is composed by four non-coplanar ring systems, two benzenes and two morpholines. One morpholine ring (C(3)-C(4)-N(1)-C(1)-C(2)-O(1)) forms a chair conformation, while the other (C(4)-C(3)-O(2)-C(6)-C(5)-N(1)) assumes a boat conformation. X-ray crystal structure displays extensive N-H…Cl and O-H…Cl intermolecular hydrogen bonds. The preliminary antidepressant activity test indicates that the inhibition ratio of SERT (5-HT Transporter) was 35.9% at the dosage of 10.0 mg/L. 展开更多
关键词 5-[4-(benzyloxy)phenyl]-9-propyl-4 6-dioxa-l-azabicyclo [3.3.1] nonanehydrochloride SYNTHESIS crystal structure antidepressant activity
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非控股股东积极参与决策提升了资产定价效率吗?--基于股价信息含量的考察视角
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作者 鲁乔杉 李秉祥 张涛 《管理工程学报》 CSCD 北大核心 2024年第5期306-323,共18页
股价信息含量对资本市场运行效率具有重要的评价作用。股价的信息含量较低,意味着股价中的公司特质性信息的融入程度较低,严重损害了股票价格引导资源配置的效率。本文以2006年至2019年中国A股上市公司为研究样本,从股价信息含量视角出... 股价信息含量对资本市场运行效率具有重要的评价作用。股价的信息含量较低,意味着股价中的公司特质性信息的融入程度较低,严重损害了股票价格引导资源配置的效率。本文以2006年至2019年中国A股上市公司为研究样本,从股价信息含量视角出发,通过上市公司股东大会的投票数据,探究非控股股东积极参与决策对股价信息含量的影响效应及内在作用机制。结果发现,非控股股东积极参与企业决策可以显著提高上市公司股价信息含量。该结论在经过一系列稳健性检验,并考虑内生性问题之后依然成立。进一步研究表明,在股权集中度高、企业信息透明度低、非“四大”审计的企业中,非控股股东参与企业决策积极性高则更有利于提高股价信息含量。研究证明非控股股东参与决策能够通过发挥“监督效应”的作用机制,进而影响股价信息含量。影响渠道的分析结果表明,抑制控股股东“掏空”行为和企业私有信息隐藏行为,是非控股股东积极参与决策提升股价信息含量的作用渠道。 展开更多
关键词 非控股股东积极性 股价信息含量 信息不对称 资源配置
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Synthesis and Antitumor Activity of 3-[2-(4-Hydroxy-Phenyl)-Ethyl]-Benzo[d] Isoxazole-4,6-Diol
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作者 Li Wang 《International Journal of Organic Chemistry》 CAS 2023年第1期1-6,共6页
A new phloretin derivative 1 3-[2-(4-hydroxy-phenyl)-ethyl]-benzo[d] isoxazole-4,6-diol (yield 63%) was synthesized from phloretin by carbonyl nucleophilic addition condensation reaction. Its structure was characteriz... A new phloretin derivative 1 3-[2-(4-hydroxy-phenyl)-ethyl]-benzo[d] isoxazole-4,6-diol (yield 63%) was synthesized from phloretin by carbonyl nucleophilic addition condensation reaction. Its structure was characterized by 1H NMR, 13C NMR and HR-MS. The phloretin, compound 1, resveratrol and acetylated resveratrol were determined by comparing them with paclitaxel. Anti-tumor activity of alcohol on SPC-A1, EC109, A549, MCF-7 and MDA-MB-231 cell lines. Compound 1 showed better antitumor activity than docetaxel against A549 tumor cells. 展开更多
关键词 3-[2-(4-Hydroxy-Phenyl)-Ethyl]-Benzo[d] Isoxazole-4 6-Diol SYNTHESIS Antitumor activity
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Catalytic Effect of Activated Carbon and Activated Carbon Fiber in Non-Equilibrium Plasma-Based Water Treatment 被引量:2
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作者 张延宗 郑经堂 +2 位作者 曲险峰 于维钊 陈宏刚 《Plasma Science and Technology》 SCIE EI CAS CSCD 2008年第3期358-362,共5页
Catalysis and regeneration efficiency of granular activated carbon (GAC) and activated carbon fiber (ACF) were investigated in a non-equilibrium plasma water treatment reactor with a combination of pulsed streamer... Catalysis and regeneration efficiency of granular activated carbon (GAC) and activated carbon fiber (ACF) were investigated in a non-equilibrium plasma water treatment reactor with a combination of pulsed streamer discharge and GAC or ACF. The experimental results show that the degradation efficiency of methyl orange (MO) by the combined treatment can increase 22% (for GAC) and 24% (for ACF) respectively compared to pulsed discharge treatment alone, indicating that the combined treatment has a synergetic effect. The MO degradation efficiency by the combined treatment with pulsed discharge and saturated GAC or ACF can increase 12% and 17% respectively compared to pulsed discharge treatment alone. Both GAC and ACF show catalysis and the catalysis of ACF is prominent. Meanwhile, the regeneration of GAC and ACF are realized in this process. When H202 is introduced into the system, the utilization efficiency of ozone and ultraviolet light is improved and the regeneration efficiency of GAC and ACF is also increased. 展开更多
关键词 non-equilibrium plasma water treatment activated carbon activated carbon fiber catalytic effect
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Electrocatalytic activity of non-precious metal catalyst Co-N/C toward oxygen reduction reaction 被引量:3
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作者 Yu Jun Si Chang Guo Chen +1 位作者 Wei Yin Hui Cai 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第8期983-986,共4页
Metallic cobalt was deposited on acetylene black to synthesize a composite Co/C by chemical reduction method.A platinumfree electrocatalyst Co-N/C(800) for oxygen reduction reaction(ORR) was synthesized by mixing ... Metallic cobalt was deposited on acetylene black to synthesize a composite Co/C by chemical reduction method.A platinumfree electrocatalyst Co-N/C(800) for oxygen reduction reaction(ORR) was synthesized by mixing the composite Co/C with urea and heat-treating at 800℃.The results from linear sweep voltammograms indicated that the Co-N/C(800) is active to ORR.Theβ-Co and cobalt oxides are not the active site of the catalyst Co-N/C.However,the existence of cobalt facilitated the modification of nitrogen to carbon black and led to the formation of active site of catalyst Co-N/C(800). 展开更多
关键词 Oxygen reduction reaction ELECTROCATALYST non-precious metal active site
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Peroxisome proliferator-activated receptors as targets to treat non-alcoholic fatty liver disease 被引量:21
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作者 Vanessa Souza-Mello 《World Journal of Hepatology》 CAS 2015年第8期1012-1019,共8页
Lately, the world has faced tremendous progress in the understanding of non-alcoholic fatty liver disease(NAFLD) pathogenesis due to rising obesity rates. Peroxisome proliferator-activated receptors(PPARs) are transcr... Lately, the world has faced tremendous progress in the understanding of non-alcoholic fatty liver disease(NAFLD) pathogenesis due to rising obesity rates. Peroxisome proliferator-activated receptors(PPARs) are transcription factors that modulate the expression of genes involved in lipid metabolism, energy homeostasis and inflammation, being altered in diet-induced obesity. Experimental evidences show that PPAR-alpha is the master regulator of hepatic beta-oxidation(mitochondrial and peroxisomal)and microsomal omega-oxidation, being markedly decreased by high-fat(HF) intake. PPAR-beta/delta is crucial to the regulation of forkhead box-containing protein O subfamily-1 expression and, hence, the modulation of enzymes that trigger hepatic gluconeogenesis. In addition, PPAR-beta/delta can activate hepatic stellate cells aiming to the hepatic recovery from chronic insult. On the contrary, PPAR-gamma upregulation by HF diets maximizes NAFLD through the induction of lipogenic factors, which are implicated in the fatty acid synthesis. Excessive dietary sugars also upregulate PPAR-gamma, triggering de novo lipogenesis and the consequent lipid droplets deposition within hepatocytes. Targeting PPARs to treat NAFLD seems a fruitful approach as PPAR-alpha agonist elicits expressive decrease in hepatic steatosis by increasing mitochondrial beta-oxidation, besides reduced lipogenesis. PPAR-beta/delta ameliorates hepatic insulin resistance by decreasing hepatic gluconeogenesis at postprandial stage. Total PPAR-gamma activation can exert noxious effects by stimulating hepatic lipogenesis. However, partial PPAR-gamma activation leads to benefits, mainly mediated by increased adiponectin expression and decreased insulin resistance. Further studies are necessary aiming at translational approaches useful to treat NAFLD in humans worldwide by targeting PPARs. 展开更多
关键词 PEROXISOME proliferator-activated receptors non-alcoholic FATTY liver disease Obesity Treatment Insulin resistance BETA-OXIDATION LIPOGENESIS
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