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PtCo with oxidase-like activity and laccase for synergistic catalytic degradation of phthalic acid esters

JOURNAL OF CLEANER PRODUCTION 2024年 470卷

作者： zhao, Xuqiang Tang, Lei Chen, xuwen Wang, Jian Gao, Yanzheng Nanjing Agr Univ Coll Resources & Environm Sci Inst Organ Contaminant Control & Soil Remediat Nanjing 210095 Jiangsu Peoples R China

Phthalic acid esters (PAEs) as common plasticizers, providing convenience to humans. However, they also present a potential threat to ecosystems and human health as emerging contaminants. In this study, co- immobilization of nanozyme (PtCo) and laccase (Lac) into dendritic mesoporous silica (DMSN) constitutes nanomaterials (Lac@PtCo@DMSN). PtCo with an atomic ratio of 3:1 has the highest oxidizing activity. DMSN exhibited a maximum Lac loading capacity of 365 mg/g and activity of Lac@PtCo@DMSN exhibits excellent pH, temperature, and storage stability and reusability, and demonstrated greater recoverability. Remarkably, Lac@PtCo@DMSN (50 mg) achieved 81.83% degradation of total PAEs within 72 h and maintained 72.44% degradation of dimethyl phthalate (DMP) in the fifth cycle. Electron transfer between Pt, Co and adsorbed oxygen (O-2ads) in PtCo can generate center dot OH and center dot O-2(-), which were the dominant reactants for PAEs degradation. center dot OH could degrade PAEs to phthalic acid via H-abstration and center dot OH addition. center dot OH effectively enhanced Lac activity, and promoted the synergistic catalytic performance of nanozymes and natural enzymes. The degradation of phthalic acid by Lac accelerated the release of PtCo@DMSN reaction sites, resulting in significantly enhanced PAEs degradation. Thus, artificial/natural enzymes can degrade PAEs without exogenous additives to solve the limitation of Lac application, providing a new strategy for degrading contaminants in water.

关键词： Phthalic acid esters Nanozyme Laccase (Lac) Reactive oxygen species (ROS) Dendritic mesoporous silica

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Analysis of heart rate variation and foetal quiet sleep cycle correlation for normal and suspicious foetuses

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BIOTECHNOLOGY & BIOTECHNOLOGICAL EQUIPMENT 2018年第4期32卷 988-992页

作者： Li, Guangfei Zhang, Song Yang, Lin Li, Shufang Wang, Yan zhao, Yangyu Yang, Yimin Hao, Dongmei Li, xuwen Zhang, Lei Xu, Mingzhou Beijing Univ Technol Coll Life Sci & Bioengn Beijing Peoples R China Peking Univ Hosp 3 Obstet & Gynecol Beijing Peoples R China Beijing Yes Med Devices Co Ltd Beijing Peoples R China Beijing Aerosp Changfeng Co Ltd Beijing Peoples R China

Cardiotocography (CTG) is the basic method of monitoring foetal condition in the perinatal period. However, due to the limited insight into the CTG generation mechanism, some CTG recordings can be mistreated as a predictor of neonatal asphyxia, leading to a wrong assessment of the foetal status and improper obstetric intervention. Therefore, in case of suspicious CTG indications, a reliable verification of the true foetal status is vital for reducing the clinical diagnosis false-positive rate and avoiding the unnecessary obstetrician intervention. The paper presents the results obtained for 44 foetuses on the shares of three heart rate variation (HRV) ranges and quiet sleep cycles. This approach uses the parameters of the HRV range shares and quiet sleep cycles to analyse different types of foetuses. The results obtained show that most parameters reveal significant differences between normal and suspicious groups. This is quite lucrative for defining a set of coefficients, whose incorporation into a classifier will improve the accuracy of distinguishing the normal foetuses from suspicious ones.

关键词： Foetal heart rate foetal quiet sleep HRV range share

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星载多波束天线通道误差特性分析及校准

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江苏大学学报（自然科学版） 2012年第5期33卷 549-554页

作者：赵星惟龚文斌梁旭文上海微小卫星工程中心上海200050 中国科学院上海微系统与信息技术研究所上海200050

针对星载多波束天线幅相误差对天线性能影响较大的问题,通过对多波束发射天线的射频通道在不同温度下的幅相特性进行试验测定,得到了通道幅相特性与温度的对应关系,发现不同通道的幅相特性与通道温度的关系曲线在给定温度区间内基本呈... 详细信息

针对星载多波束天线幅相误差对天线性能影响较大的问题,通过对多波束发射天线的射频通道在不同温度下的幅相特性进行试验测定,得到了通道幅相特性与温度的对应关系,发现不同通道的幅相特性与通道温度的关系曲线在给定温度区间内基本呈线性关系,且斜率基本一致,从而确定了对不同通道的幅相特性进行固定值补偿的校准策略.通过固定值补偿后,各通道的幅相特性曲线基本重合,从而消除了通道间幅相误差.进一步给出了提升温度一致性的措施,并设计了多波束发射天线的校准原理框图和校准流程图.结果表明:新的星载多波束天线幅相误差校准方法是有效的.

关键词：卫星多波束天线通道误差幅相误差校准

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Nanomaterials with dual immunomodulatory functions for synergistic therapy of breast cancer brain metastases

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Bioactive Materials 2023年第9期27卷 474-487页

作者： Zhenhao zhao Chufeng Li Yiwen Zhang Chao Li Yongchao Chu xuwen Li Peixin Liu Hongyi Chen Yu Wang Boyu Su Qinjun Chen Tao Sun Chen Jiang Department of Pharmaceutics School of PharmacyFudan UniversityKey Laboratory of Smart Drug DeliveryMinistry of EducationState Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain ScienceShanghai201203China

A long-standing paucity of effective therapies results in the poor outcomes of triple-negative breast cancer brain *** has made progress in the treatment of tumors,but limited by the non-immunogenicity of tumors and strong immunosuppressive environment,patients with TNBC brain metastases have not yet benefited from *** immunoregulatory strategies with enhanced immune activation and reversal of the immunosuppressive microenvironment provide new therapeutic options for ***,we propose a cocktail-like therapeutic strategy of microenvironment regulation-chemotherapy-immune synergistic sensitization and construct reduction-sensitive immune microenvironment regulation nanomaterials(SIL@T).SIL@T modified with targeting peptide penetrates the BBB and is subsequently internalized into metastatic breast cancer cells,releasing silybin and oxaliplatin responsively in the ***@T preferentially accumulates at the metastatic site and can significantly prolong the survival period of model *** studies have shown that SIL@T can effectively induce immunogenic cell death of metastatic cells,activate immune responses and increase infiltration of CD8+T ***,the activation of STAT3 in the metastatic foci is attenuated and the immunosuppressive microenvironment is *** study demonstrates that SIL@T with dual immunomodulatory functions provides a promising immune synergistic therapy strategy for breast cancer brain metastases.

关键词： Breast cancer brain metastases Drug delivery Immunogenic cell death Microenvironmental regulation STAT3

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Network topology and machine learning analyses reveal microstructural white matter changes underlying Chinese medicine Dengzhan Shengmai treatment on patients with vascular cognitive impairment

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PHARMACOLOGICAL RESEARCH 2020年 156卷 104773-104773页

作者： Lu, Hui Zhang, Junying Liang, Ying Qiao, Yanan Yang, Caishui He, xuwen Wang, Wenxiao zhao, Shaokun Wei, Dongfeng Li, He Cheng, Weidong Zhang, Zhanjun Southern Med Univ Sch Tradit Chinese Med Guangzhou 510515 Guangdong Peoples R China China Acad Chinese Med Sci Inst Basic Res Clin Med Beijing 100700 Peoples R China Beijing Normal Univ State Key Lab Cognit Neurosci & Learning 19 Xinjiekouwai St Beijing 100875 Peoples R China Beijing Normal Univ IDG McGovern Inst Brain Res Beijing 100875 Peoples R China Capital Med Univ Sch Biomed Engn Beijing 100069 Peoples R China China Japan Friendship Hosp Beijing 100029 Peoples R China Beijing Normal Univ BABRI Ctr Beijing 100875 Peoples R China

With the increasing incidence of cerebrovascular diseases and dementia, considerable efforts have been made to develop effective treatments on vascular cognitive impairment (VCI), among which accumulating practice-based evidence has shown great potential of the traditional Chinese medicine (TCM). Current randomized double-blind controlled trial has been designed to evaluate the 6-month treatment effects of Dengzhan Shengmai (DZSM) capsules, one TCM herbal preparations on VCI, and to explore the underlying neural mechanisms with graph theory-based analysis and machine learning method based on diffusion tensor imaging (DTI) data. A total of 82 VCI patients were recruited and randomly assigned to drug (45 with DZSM) and placebo (37 with placebo) groups, and neuropsychological and neuroimaging data were acquired at baseline and after 6-month treatment. After treatment, compared to the placebo group, the drug groups showed significantly improved performance in Alzheimer's Disease Assessment Scale-Cognitive subscale (ADAS-cog) score (p < 0.001) and the other cognitive domains. And with the reconstruction of white matter structural network, there were more streamlines connecting the left thalamus and right hippocampus in the drug groups (p < 0.001 uncorrected), with decreasing nodal efficiency of the right olfactory associated with slower decline in the general cognition (r = 0.364, p = 0.048). Moreover, support vector machine classification analyses revealed significant white matter network alterations after treatment in the drug groups (accuracy of baseline vs. 6-month later, 68.18 %). Taking together, the present study showed significant efficacy of DZSM treatment on VCI, which might result from white matter microstructure alterations and the topological changes in brain structural network.

关键词： Vascular cognitive impairment Traditional Chinese medicine Dengzhan Shengmai capsule Diffusion tensor imaging Structural brain network Graph theory analysis

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Sex differences in externalizing and internalizing traits and ventral striatal responses to monetary loss

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JOURNAL OF PSYCHIATRIC RESEARCH 2023年第1期162卷 11-20页

作者： Li, Guangfei Li, Yashuang Zhang, zhao Chen, Yu Li, Bao Hao, Dongmei Yang, Lin Yang, Yimin Li, xuwen Li, Chiang-Shan R. Beijing Univ Technol Fac Environm & Life Dept Biomed Engn Beijing Peoples R China Beijing Int Sci & Technol Cooperat Base Intelligen Beijing Peoples R China Beijing Inst Technol Sch Life Sci Dept Biomed Engn Beijing Peoples R China Yale Univ Sch Med Dept Psychiat New Haven CT USA Yale Univ Sch Med Dept Neurosci New Haven CT USA Yale Univ Sch Med Interdept Neurosci Program New Haven CT USA Yale Univ Wu Tsai Inst New Haven CT USA Beijing Univ Technol 220 Life Sci Bldg 100 Pingleyuan Beijing 100124 Peoples R China Connecticut Mental Hlth Ctr S112 34 Pk St New Haven CT 06519 USA

Ventral striatum (VS) processes rewarding and punishing stimuli. Women and men vary in externalizing and internalizing traits, which may influence neural responses to reward and punishment. To investigate sex dif-ferences in how individual traits influence VS responses to reward and punishment, we curated the data of the Human Connectome Project and identified 981 (473 men) subjects evaluated by the Achenbach Adult Self-Report Syndrome Scales. We processed the imaging data with published routines and extracted VS response (beta) to win and to loss vs. baseline in a gambling task for correlation with externalizing and internalizing symptom severity. Men vs. women showed more severe externalizing symptoms and higher VS response to monetary losses (VS-loss beta) but not to wins. Men but not women showed a significant, positive correlation between VS-loss beta and externalizing traits, and the sex difference was confirmed by a slope test. The correlations of VS-loss vs. exter-nalizing and of VS-win vs. externalizing and those of VS-loss vs. externalizing and of VS-loss vs. internalizing traits both differed significantly in slope, confirming its specificity, in men. Further, the sex-specific relationship between VS-loss beta and externalizing trait did not extend to activities during exposure to negative emotion in the face matching task. To conclude, VS responses to loss but not to win and their correlation with externalizing rather than internalizing symptom severity showed sex differences in young adults. The findings highlight the relationship of externalizing traits and VS response to monetary loss and may have implications for psychological models of externalizing behaviors in men.

关键词： Externalizing VS Punishment Sex differences fMRI

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Improved Local Maximal Occurrence Feature Representation for Person Re-Identification

Improved Local Maximal Occurrence Feature Representation for...

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IEEE International Conference on Software Engineering and Service Sciences (ICSESS)

作者： Yuanxin Zhu zhao Yang xuwen Yao Sai zhao Shaohu Peng School of Mechanical and Electric Engineering Guangzhou University Guangzhou Guangdong P.R. China

ISBN: (纸本)9781538665664;9781538665657

Person re-identification is a technique to automatically search the same people in different camera views. It is a challenging task because of the huge variations caused by different illuminations and views in images. There is an effective method tackling the problem, which learns a useful feature representation for the pedestrian images. In recent research, a feature representation named Local Maximal Occurrence (LOMO)achieves outstanding performance, but LOMO has a disadvantage that its robustness to illumination is not excellent. In this paper, we propose an improved LOMO representation to further reduce the impact of light. The improved LOMO feature combines Color Name feature with LOMO, because Color Name feature has strong robustness to illumination. However, Color Narne feature has the weakness that it loses graphical details. Therefore, the feature is unsuitable for traditional pooling method. To overcome the disadvantage, a specific pooling method called global Gaussian pooling for Color Name feature is designed, which is based on Gaussian distribution and can weigh the different regions of an image. The important regions gain more attention in matching images. The experimental results on two public available datasets demonstrate the effectiveness of our proposed approach.

关键词： Image color analysis Lighting Histograms Feature extraction Measurement Gaussian distribution Training

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Study on Mechanical Behavior of Masonry Wall in School Building Reinforced by CFRP

Study on Mechanical Behavior of Masonry Wall in School Build...

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2013 International Conference on Materials Engineering and Mechanical Automation(MEMA 2013)

作者： Hong Lin zhao Yang xuwen Wang Xiang Ke Design and research institute Wuhan University of Technology Institute of Urban Construction Wuhan University of Science and Technology

CFRP is a new kind of building materials popularly used in structure *** order to study the reinforcement technique for masonry walls of school buildings,the walls with window opening strengthened by CFRP were studied in the *** on the experiment result,the finite element simulation and theoretical calculation analysis were done to study the mechanical behavior and shear capacity of the wall with window opening reinforced by *** CFRP pasted at the corner of window opening were proved to be effectively in improving shear capacity of the walls,and simple calculation formulas of shear capacity were provided in the paper,which proved to be accurate.

关键词： CFRP Masonry structure Mechanical behavior Shear capacity

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采用三音校准法的星载多波束天线校准系统

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江苏大学学报（自然科学版） 2012年第2期33卷 181-186页

作者：赵星惟龚文斌梁旭文上海微小卫星工程中心上海200050 中国科学院上海微系统与信息技术研究所上海200050

为了解决宽带多波束天线系统中常规校准不能兼顾工作频带的低频段和高频段的问题,根据星载多波束天线系统的特点,提出了三音校准法.采用3个单音信号作为校准信号对多波束系统的通道进行测量,以二次拟合得到全工作带宽内的通道幅相特性曲... 详细信息

为了解决宽带多波束天线系统中常规校准不能兼顾工作频带的低频段和高频段的问题,根据星载多波束天线系统的特点,提出了三音校准法.采用3个单音信号作为校准信号对多波束系统的通道进行测量,以二次拟合得到全工作带宽内的通道幅相特性曲线,并采用多次测量形成拟合点,降低了测量误差的影响;再以拟合的特性曲线的逆函数进行通道幅相补偿,使全带宽内通道特性曲线成为水平直线,从而完成了单通道的校准;最后以补偿项补偿通道间幅相差异,从而达到通道间误差校准的目的.并将三音校准法应用到卫星天线的近场校准和内部校准2种校准系统中.结果表明:三音校准法比传统的单点校准和分段式校准更利于通道间误差的校准,能够有效地抑制通道的不一致性.

关键词：校准误差天线阵列多波束天线卫星天线

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An aramid nanofibers-based gel polymer electrolyte with high mechanical and heat endurance for all-solid-state NIR electrochromic devices

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SOLAR ENERGY MATERIALS AND SOLAR CELLS 2019年 200卷 109952-000页

作者： Yang, xuwen Cong, Shan Li, Juan Chen, Jian Jin, Feng zhao, Zhigang Univ Sci & Technol China Sch Nano Technol & Nano Bion Hefei 230026 Anhui Peoples R China Chinese Acad Sci Key Lab Nanodevices & Applicat Suzhou Inst Nanotech & Nanobion Suzhou 215123 Peoples R China Chinese Acad Sci Key Lab Multifunct Nanomat & Smart Syst Suzhou 215123 Peoples R China Chinese Acad Sci Div Nanomat Suzhou Inst Nanotech & Nanobion Nanchang 330200 Jiangxi Peoples R China

A new type of gel polymer electrolyte composed of free-standing aramid nanofibers was used to fabricate allsolid-state near-infrared (NIR) electrochromic devices for NIR sheltering applications. This new type of gel polymer electrolyte showed excellent mechanical and heat endurance compared with currently available gel polymer electrolytes. The good film-forming ability of the aramid nanofibers makes assembling the electrochromic devices more convenient. The as-fabricated device showed an optical modulation of about 40% at 980 nm and achieved a coloration efficiency of 79.5 cm(2)C(-1), values that are larger than those previously reported for other electrochromic devices with similar structures. It is expected that aramid nanofibers-LiCIO4-based electrolyte films with high mechanical and heat endurance will have potential applications in spacecraft thermal control, optical communication, and biomedical analysis.

关键词： Near-infrared Aramid nanofibers Gel polymer electrolyte Thermal stability Electrochromic devices

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