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Siliceous mesocellular foam supported Cu catalysts for promoting non-thermal plasma activated CO_(2) hydrogenation toward methanol synthesis

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Frontiers of Chemical Science and Engineering 2024年第7期18卷 55-65页

作者： Yi Chen Shaowei Chen Yan Shao Cui Quan ningbo Gao Xiaolei Fan Huanhao Chen State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 211816China school of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China school of Energy and Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Chemical Engineering School of EngineeringThe University of ManchesterManchester M139PLUK Nottingham ningbo china Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315048China Institute of Wenzhou Zhejiang UniversityWenzhou 325006China

Electrified non-thermal plasma (NTP) catalytic hydrogenation is the promising alternative to the thermal counterparts, being able to be operated under mild conditions and compatible with green electricity/hydrogen. Rational design of the catalysts for such NTP-catalytic systems is one of the keys to improve the process efficiency. Here, we present the development of siliceous mesocellular foam (MCF) supported Cu catalysts for NTP-catalytic CO_(2) hydrogenation to methanol. The findings show that the pristine MCF support with high specific surface area and large mesopore of 784 m2·g−1 and ~8.5 nm could promote the plasma discharging and the diffusion of species through its framework, outperforming other control porous materials (viz., silicalite-1, SiO_(2), and SBA-15). Compared to the NTP system employing the bare MCF, the inclusion of Cu and Zn in MCF (i.e., Cu1Zn1/MCF) promoted the methanol formation of the NTP-catalytic system with a higher space-time yield of methanol at ~275 μmol·g_(cat)^(−1)·h^(−1) and a lower energy consumption of 26.4 kJ^(−1)·mmol_(CH_(3)OH)^(-1) (conversely, ~225 μmol·g_(cat)^(−1)·h^(−1) and ~71 kJ^(−1)·mmol_(CH_(3)OH)^(-1), respectively, for the bare MCF system at 10.1 kV). The findings suggest that inclusion of active metal sites (especially Zn species) could stabilize the CO_(2)/CO-related intermediates to facilitate the surface reaction toward methanol formation.

关键词： non-thermal plasma(NTP)catalysis Cu catalyst CO_(2)hydrogenation methanol siliceous mesocellular foam(MCF)

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Anti-biofilm and anti-virulence potential of cell free supernatant of Akkermansia muciniphila against Salmonella

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Food Science and Human Wellness 2024年第5期13卷 2677-2689页

作者： Jiaxiu Liu Wenxiu Zhu Huanhuan Liu Xiaomeng Ren ningbo Qin Xiaodong Xia National Engineering Research Center of Seafood School of Food Science and TechnologyDalian Polytechnic UniversityDalian 116034China

Akkermansia muciniphila is one of the commensals residing within the mammalian gut and co-evolving with the *** studies have demonstrated the benefits of *** in ameliorating metabolic disorders,while little is known about the antimicrobial potential of *** against ***,we examined the antimicrobial and anti-virulence properties of cell free supernatant(CFS)of *** against Salmonella *** retarded bacterial growth and inhibited the motility of *** SL1344 and *** *** dose-dependently reduced cell hydrophobicity and auto-aggregation of both ***,CFS from *** significantly attenuated biofilm *** with untreated bacteria,CFS-treated bacteria significantly decreased adhesion and invasion to Caco-2 cells,and reduced intracellular survival in *** maintained antimicrobial properties after treatment with high temperatures and various proteases,while it lost its antimicrobial activity after pH *** chromatography-mass spectrometry(GC-MS)confirmed that *** produced a certain amount of acetate and propionate,and ultra-high-performance liquid chromatography-mass spectrometry(UHPLCMS)identified other organic acids and metabolites in *** summary,CFS from *** exhibited anti-biofilm and anti-virulence properties against Salmonella and could be potentially utilized in the food industry for controlling Salmonella contamination and reducing infection.

关键词： Akkermansia muciniphila Salmonella Biofilm Motility Short-chain fatty acid Adhesion Invasion

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Anticancer effect of aloe-emodin on cervical cancer cells involves G2/M arrest and induction of differentiation

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Acta Pharmacologica Sinica 2007年第12期28卷 1991-1995页

作者： Jun-ming GUO~(2,3),Bing-xiu XIAO~2,Qiong LIU~2,Shun ZHANG~(2,4),Dong-hai LIU~(2,4),Zhao-hui GONG~2~2 ningbo university school of Medicine,ningbo 315211,china ~4 affiliated hospital(ningbo № 2 hospital),ningbo university school ofmedicine,ningbo 315010,china ningbo university school of Medicine Ningbo China affiliated hospital (ningbo No 2 hospital) Ningbo University School of Medicine Ningbo China

Aim:The aim of this study was to investigate the effects of aloe-emodin,a naturalcompound from the root and rhizome of Rheum palmatum,on the growth of hu-man cervical cancer cells,***:HeLa ceils were treated with variousconcentrations of aloe-emodin for 1-5 d,and cell growth was measured by 3-（4,5-dimethylthiazol-2-yl）-2,5-diphenyl tetrazolium bromide *** long-termgrowth effect was investigated by crystal violet *** distributions of thecell cycle and apoptosis were analyzed by flow *** alkaline phos-phatase （ALP） activity was analyzed by a chemical ***,Westernblotting was used to indicate the abundant changes of protein kinase C （PKC）,c-myc,cyclins,cyclin-dependent kinases （CDK）,and proliferating cell nuclear anti-gen （PCNA）.Results:Aloe-emodin inhibited the growth of HeLa cells in a dose-dependent manner at concentrations ranging between 2.5 and 40 μmol/*** cytometric analysis showed that HeLa cells were arrested at the G2/M *** effect was associated with the decrease in cyclin A and CDK2,and theincrease in cyclin B1 and *** importantly,the ALP activity was found tobe increased by aloe-emodin treatment,and accompanied by the inhibition ofPCNA *** addition,aloe-emodin suppressed the expression of PKCαand ***:These findings provide a possible mechanistic explana-tion for the growth inhibitory effect of aloe-emodin on HeLa,which includes cellcycle arrest and inducing differentiation.

关键词： HeLa cells cell cycle aloe-emodin alkaline phosphatase c-myc

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Embedding Perovskite in Polymer Matrix Achieved Positive Temperature Response with Inversed Temperature Crystallization

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Energy & Environmental Materials 2024年第5期7卷 361-371页

作者： Meiting Peng Xue Guan Yingzhu Wu Nan Zhang Qi Feng Liyong Tian Yancheng Wu Yangfan Zhang Feng Gan Fuqin Deng Meilin Huang Guichuan Xing ningbo Yi College of Textile Science and Engineering Wuyi University Institute of Applied Physics and Materials Engineering University of Macau school of Applied Physics and Materials Wuyi University Faculty of Intelligent Manufacturing Wuyi University

Organic perovskites are promising semiconductor materials for advanced photoelectric applications. Their fluorescence typically shows a negative temperature coefficient due to bandgap change and structural instability. In this study, a novel perovskite-based composite with positive sensitivity to temperature was designed and obtained based on its inverse temperature crystallization, demonstrating good flexibility and solution processability. The supercritical drying method was used to address the limitations of annealing drying in preparing high-performance perovskite. Optimizing the precursor composition proved to be an effective approach for achieving high fluorescence and structural integrity in the perovskite material. This perovskite-based composite exhibited a positive temperature sensitivity of28.563%℃-1for intensity change and excellent temperature cycling reversibility in the range of 25–40℃in an ambient environment. This made it suitable for use as a smart window with rapid response. Furthermore, the perovskite composite was found to offer temperature-sensing photoluminescence and flexible processability due to its components of perovskite-based compounds and polyethylene oxide. The organic precursor solvent could be a promising candidate for use as ink to print or write on various substrates for optoelectronic devices responding to temperature.

关键词： flexibility inversed temperature crystallization perovskite positive temperature response

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基于最大压强控制的交叉口自动驾驶汽车和行人管理方法

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华南理工大学学报（自然科学版） 2024年第2期52卷 124-135页

作者：曹宁博赵利英长安大学运输工程学院陕西西安710061 西安理工大学经济与管理学院陕西西安710048

为提高交叉口自动驾驶汽车和行人的管理水平,进而改善交通流的运行效率和稳定性,文中基于最大压强控制和自动驾驶汽车轨迹规划方法构建了交叉口自动驾驶汽车和行人管理方法。首先,综合考虑行人到达率、人行横道尺寸、等待时间和行人到... 详细信息

为提高交叉口自动驾驶汽车和行人的管理水平,进而改善交通流的运行效率和稳定性,文中基于最大压强控制和自动驾驶汽车轨迹规划方法构建了交叉口自动驾驶汽车和行人管理方法。首先,综合考虑行人到达率、人行横道尺寸、等待时间和行人到达分布规律等对行人的影响,利用概率分布函数对行人排队长度进行建模,并利用估计的行人排队长度,基于最大压强控制方法构建了交叉口自动驾驶汽车和行人排队长度管理方法;然后,为帮助交叉口内部自动驾驶汽车避免碰撞并获取最佳运动轨迹,结合最大压强控制方法与已有交叉口自动驾驶汽车轨迹规划方法,在控制交叉口自动驾驶汽车和行人排队长度的基础上,同时对自动驾驶汽车轨迹进行规划;最后,利用Python联合SUMO开源交通仿真软件对模型进行验证,仿真持续2h。仿真结果表明,在不同自动驾驶汽车和行人需求条件下,该自动驾驶汽车和行人管理方法的加入不仅能够实现对自动驾驶汽车运动轨迹的规划控制,而且能够迅速稳定和降低它们的延误与排队长度,并能改善交叉口运行效率。

关键词：自动驾驶汽车行人最大压强控制轨迹规划管理方法

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论智利南极立法的发展与完善——以第21255号法律为例

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极地研究 2024年第2期36卷 254-265页

作者：吴宁铂杨子阳上海对外经贸大学法学院上海201620

地理空间的邻近和对南极的领土主张,使得智利一直把南极定义为国家的核心利益之一,并促使智利在南极事务中发挥着举足轻重的作用。在不同的历史时期,智利一直将南极立法视为维护本国南极权益与应对形势变化的重要手段,逐步建立起以“南... 详细信息

地理空间的邻近和对南极的领土主张,使得智利一直把南极定义为国家的核心利益之一,并促使智利在南极事务中发挥着举足轻重的作用。在不同的历史时期,智利一直将南极立法视为维护本国南极权益与应对形势变化的重要手段,逐步建立起以“南极领土”管理为基本框架,依据国家南极政策目标的调整与南极条约体系的发展而不断完善的南极法律制度,其中2021年生效的第21255号法律作为与时俱进的典型代表,对我国南极立法具有一定启示意义。

关键词：智利南极条约体系南极治理南极立法

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基于自适应拟合的桥梁影响线提取方法

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铁道科学与工程学报 2024年第5期21卷 1909-1918页

作者：石爽王灿王宁波安徽三联集团博士后工作站安徽合肥230601 中南大学土木工程学院湖南长沙410075

桥梁影响线(IL)被广泛用于动态称重、结构评估、损伤识别等领域,如何从桥梁实测响应中准确提取桥梁影响线至关重要。为此,提出一种自适应拟合算法,用于从车辆过桥响应中提取高精度、准静态的桥梁影响线。从多车轴对桥梁的作用机理出发,... 详细信息

桥梁影响线(IL)被广泛用于动态称重、结构评估、损伤识别等领域,如何从桥梁实测响应中准确提取桥梁影响线至关重要。为此,提出一种自适应拟合算法,用于从车辆过桥响应中提取高精度、准静态的桥梁影响线。从多车轴对桥梁的作用机理出发,通过矩阵运算获取桥梁初始影响线。随后,采用自适应拟合算法来消除初始影响线中的波动干扰成分,从而提取高精度、准静态的桥梁影响线。开展静载和移动荷载模型桥试验,以静载实测影响线为基准,与移动荷载试验所提取的影响线作对比,验证文中自适应拟合算法的可行性。最后,通过与既有影响线提取方法进行比较,深入探讨了多种算法在波动性、精确性和计算速度上的优劣,验证了自适应拟合算法在提取桥梁影响线上的优势。研究结果表明:桥梁实测响应中包含了静态成分和波动成分,自适应拟合算法可较好地提取准静态桥梁影响线。该算法可根据原始响应的波动程度自动选取合适的数据段进行拟合,通过调节参数λ达到平滑的效果,同时保留数据局部信息。所提取的影响线不仅在精度上较既有方法存在一定优势,计算速度也较为理想,可在2~3次迭代后达到较高精确度。提出的基于自适应拟合的桥梁影响线提取方法为影响线的广泛应用奠定了基础。

关键词：桥梁影响线移动荷载试验自适应拟合迭代拟合信号处理

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Effect of Porphyromonas gingivalis PrtC on cytokine expression in ECV304 endothelial cells and its level in subgingival plaques from patients with chronic periodontitis

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Acta Pharmacologica Sinica 2007年第7期28卷 1015-1023页

作者： Yan-min WU~2,Li-li CHEN~(2,6),Jie YAN~(3,6),Chun-yan ZHUANG~4,Zhi-yuan GU~5~2 Department of Stomatology,the Second affiliated hospital,College of Medicine,Zhejiang university,Hangzhou 310009,china ~3 Depart-ment of Medical Microbiology and Parasitology,College of Medicine,Zhejiang university,Hangzhou 310006,china ~4 Department ofStomatology,the affiliated hospital of the school of Medicine,ningbo university,ningbo 315020,china ~5 Department of Oral andMaxillofacial Surgery,the affiliated hospital of Stomatology,College of Medicine,Zhejiang university,Hangzhou 310006,china Department of Stomatology the Second Affiliated Hospital College of Medicine Zhejiang University Hangzhou China Department of Medical Microbiology and Parasitology College of Medicine Zhejiang University Hangzhou China Department of Stomatology the Affiliated Hospital of the School of Medicine Ningbo University Ningbo China Department of Oral and Maxillofacial Surgery the Affiliated Hospital of Stomatology College of Medicine Zhejiang University Hangzi China

Aim:To investigate the effect of the collagenase gene (prtC) product ofPorphyromonas gingivalis on inducing host cells to secrete inflammatorycytokines,and to discuss the correlation between the PrtC level in subgingivalplaque samples and clinical ***:A prokaryotic expression sys-tem pET32a-prtC-Escheria coli BL21 DE3 was *** and im-munoreactivity of the recombinant PrtC protein (rPrtC) was identified by *** was applied to detect interleukin (IL)-1α,IL-8,and TNF-α levelsin supernatants from rPrtC-induced human umbilical vein endothelial cells (HUVEC)originated ECV304 *** parameters recorded at baseline and after treat-ment included bleeding on probing (BOP),probing depth (PD),and attachmentloss (AL).ELISA was established to measure the PrtC level in 196 subgingivalplaque samples from 49 patients with chronic ***:After co-incubation with 1 μg/mL rPrtC for 24 h and with 5 or 10 μg/mL rPrtC for 12 h,thelevels of IL-1α,IL-8,and TNF-α secreted by the ECV304 cells increased signifi-candy (P6 mm PDsites was higher than that in the BOP-negative or the ≤2 mm AL or ≤6 mm PD sites(P6 mm PD sites,the PrtC levels changed insignifi-cantly (P>0.05).Conclusion:rPrtC is able to directly induce host cells to synthe-size and secrete IL-1α,IL-8,and TNF-α.The PrtC level in subgingival samples iscorrelated with BOP,AL,and PD.

关键词： Porphyromonas gingivalis collagenase cloning cytokine ELISA

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灵光独耀:沈宗灵与中国法理学

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中国法律评论 2024年第4期 149-154页

作者： Peking university Law school 北京大学法学院

在其诸多弟子的追忆中,沈宗灵先生一生专心治学、淡泊名利,由此常常对世事保持一种有意的疏离。“灵光独耀,迥脱根尘”,或许便是这位法理学大家的灵魂写照。壹“经国济民”:沈宗灵的早年岁月1923年2月24日,沈宗灵出生于浙江杭州的一个... 详细信息

在其诸多弟子的追忆中,沈宗灵先生一生专心治学、淡泊名利,由此常常对世事保持一种有意的疏离。“灵光独耀,迥脱根尘”,或许便是这位法理学大家的灵魂写照。壹“经国济民”:沈宗灵的早年岁月1923年2月24日,沈宗灵出生于浙江杭州的一个商人家庭,后随家人迁居上海。

关键词：沈宗灵淡泊名利法理学浙江杭州灵光

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塑料热解耦合等离子体催化重整制氢

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化工进展 2024年第10期43卷 5901-5912页

作者：马艳高宁博孙安邦全翠西安交通大学能源与动力工程学院陕西西安710049 西安交通大学电工材料电气绝缘全国重点实验室陕西西安710049

将废塑料转化为可用的能源或燃料,可以缓解塑料废弃物增加和化石能源减少带来的环境问题。为实现塑料高效热转化制备氢能,本文提出一种塑料热解耦合等离子体催化重整制氢的新路线。采用嵌有同轴介质阻挡放电(DBD)等离子体区的两段式固... 详细信息

将废塑料转化为可用的能源或燃料,可以缓解塑料废弃物增加和化石能源减少带来的环境问题。为实现塑料高效热转化制备氢能,本文提出一种塑料热解耦合等离子体催化重整制氢的新路线。采用嵌有同轴介质阻挡放电(DBD)等离子体区的两段式固定床反应器,探索低温时高密度聚乙烯(HDPE)、聚丙烯(PP)和聚苯乙烯(PS)在单独加热、单独等离子体重整、单独催化重整和等离子体催化重整模式4种重整模式下的产物分布。结果表明:相较于单独加热模式,单独等离子体和单独催化重整模式均可提高气体产率,尤其是H_(2);等离子体和催化剂具有协同作用,等离子体催化重整模式可大幅提高气体产率,其中高密度聚乙烯的H_(2)选择性最高(66.44%);催化剂上的碳沉积和孔隙堵塞导致催化剂烧结严重程度顺序:HDPE>PP>PS。等离子体放电可以改善催化剂表面的碳沉积和金属相聚集问题,增加催化剂的比表面积和孔体积,减小平均孔径。因此,热解耦合等离子体催化重整系统为优化塑料能源生产提供了有效的参考方案。

关键词：塑料等离子体催化制氢催化热解

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