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The d-orbital regulation of isolated manganese sites for enhanced oxygen evolution

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Nano Research 2023年第8期16卷 10796-10802页

作者： xue Bai Jingyi Han Xiaodi niu Jingqi Guan Institute of Physical Chemistry College of ChemistryJilin University2519 Jiefang RoadChangchun 130021China College of Food Science and Engineering Jilin UniversityChangchun 130062China

Developing transition metal-nitrogen-carbon materials(M-N-C)as electrocatalysts for the oxygen evolution reaction(OER)is significant for low-cost energy conversion *** d-orbital adjustment of M center in M-N-C is beneficial to the improvement of OER ***,we synthesize a single-Mn-atom catalyst based on carbon skeleton(Mn_(1)-N_(2)S_(2)C_(x))with isolated Mn-N_(2)S_(2)sites,which exhibits high alkaline OER activity(η10=280 mV),low Tafel slope(44 mV·dec^(−1)),and excellent *** calculations reveal the pivotal function of isolated Mn-N_(2)S_(2)sites in promoting OER,including the adsorption kinetics of intermediates and activation mechanism of active *** doping of S causes the increase in both charge density and work function of active Mn center,and ortho-Mn_(1)-N_(2)S_(2)C_(x)expresses the fastest OER kinetics due to the asymmetric plane.

关键词： dual-heteroatom coordination Mn1-N_(2)S_(2)C_(x) oxygen evolution reaction(OER) single-atom catalyst theoretical calculation

Research progress on the role of connective tissue growth factor in fibrosis of diabetic retinopathy

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International Journal of Ophthalmology(English edition) 2018年第9期11卷 1550-1554页

作者： Teng Ma Li-Jie Dong xue-Li Du rui niu Bo-Jie Hu Tianjin Medical University Eye Hospital Tianjin Medical University Eye InstituteOphthalmology College of Tianjin Medical University

Diabetic retinopathy（DR） is one of the most important types of diabetic microangiopathy, which is a specific change of fundus lesions and is one of the most serious complications of diabetes. When DR develops to proliferative DR, the main factors of decreasing vision, and even blindness, include retinal detachment and vitreous hemorrhage caused by contraction of blood vessels by fiber membrane. Recent studies reported that the formation of fiber vascular membrane is closely related to retinal fibrosis. The connective tissue growth factor（CTGF） is a cytokine that is closely related to DR fibrosis. However, its mechanism is poorly understood. This paper summarizes the recent studies about CTGF on DR fibrosis for a comprehensive understanding of the role and mechanism of CTGF in PDR.

关键词： proliferative diabetic retinopathy fibrosis connective tissue growth factor vascular endothelial growth factor

The Multi-parameter Test of Gravitational Wave Dispersion with Principal Component Analysis

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Research in Astronomy and Astrophysics 2024年第5期24卷 140-150页

作者： Zhi-Chu Ma rui niu Wen Zhao CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China School of Astronomy and Space Sciences University of Science and Technology of ChinaHefei 230026China

In this work, we consider a conventional test of gravitational wave(GW) propagation which is based on the phenomenological parameterized dispersion relation to describe potential departures from General Relativity(GR)along the propagation of GWs. But different from tests conventionally performed previously, we vary multiple deformation coefficients simultaneously and employ the principal component analysis(PCA) method to remedy the strong degeneracy among deformation coefficients and obtain informative posteriors. The dominant PCA components can be better measured and constrained, and thus are expected to be more sensitive to potential departures from the waveform model. Using this method we analyze ten selected events and get the result that the combined posteriors of the dominant PCA parameters are consistent with GR within 99.7% credible intervals. The standard deviation of the first dominant PCA parameter is three times smaller than that of the original dispersion parameter of the leading order. However, the multi-parameter test with PCA is more sensitive to not only potential deviations from GR but also systematic errors of waveform models. The difference in results obtained by using different waveform templates hints that the demands of waveform accuracy are higher to perform the multiparameter test with PCA. Whereas, it cannot be strictly proven that the deviation is indeed and only induced by systematic errors. It requires more thorough research in the future to exclude other possible reasons in parameter estimation and data processing.

关键词： gravitational waves-gravitation-black hole physics

分子印迹膜-固相萃取-高效液相色谱法同时检测橙子中噻苯隆和氯吡脲

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食品科学 2025年第1期46卷 176-183页

作者：石雨王建豆瑞祁迎春董晓牛志睿任景俞黄华赵怡雪延安大学石油工程与环境工程学院延安市环境检测与修复重点实验室陕西延安716000 北京理工大学化学与化工学院北京100081

以聚多巴胺(polydopamine,PDA)修饰的聚偏氟乙烯(polyvinylidene fluoride,PVDF)膜为基膜,噻苯隆(thidiazuron,TDZ)为模板,甲基丙烯酸(methacrylic acid,MAA)为功能单体,乙二醇二甲基丙烯酸酯(ethylene glycol dimethacrylate,EGDMA)为交联剂,合成TDZ分子印迹膜(molecularly imprinted membrane,MIM),并将其应用于橙子中TDZ及其结构类似物氯吡脲(forchlorfenuron,CPPU)的高选择性同时提取。扫描电子显微镜表征结果表明,致密分子印迹聚合物通过PDA涂层固定在PDA@PVDF膜的三维网络结构表面;性能测试结果表明,MIM对TDZ和CPPU的吸附容量分别是相应非印迹膜的1.80、1.89倍,分别在20、30 min达到吸附平衡;MIM对干扰物质香豆素和3-叔丁基苯酚的特异性因子分别达到23.2和19.3。以MIM为固相萃取膜片,成功从橙子样品中高选择性同时提取TDZ和CPPU,在加标浓度为2.0、3.0、5.0μmol/L时,高效液相色谱法检测的加标回收率分别为90.3%~99.4%和88.2%~98.1%,相对标准偏差分别为0.9%~2.5%和1.2%~3.0%(n=3)。该方法能同时快速检测TDZ和CPPU,操作简单,具有较好的灵敏度、精密度及回收率,检测成本低,适用于果蔬中TDZ和CPPU残留的检测。

关键词：分子印迹膜固相萃取高效液相色谱法特异性识别噻苯隆氯吡脲

Effects of Target and Distractor Saturations on the Cognitive Performance of an Integrated Display Interface

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Chinese Journal of Mechanical Engineering 2015年第1期28卷 208-216页

作者： xue Chengqi LI Jing WANG Haiyan niu Yafeng College of Mechanical Engineering Southeast University

Color coding is often used to enhance decision quality in complex man-machine interfaces of integrated display systems. However, people are easily distracted by irrelevant colors and by the numerous data points and complex structures in the interface. Although an increasing number of studies are seriously focusing on the problem of achieving efficient color coding, few are able to determine the effects of target and distractor saturations on cognitive performance. To study the performances of target colors among distractors, a systematic experiment is conducted to assess the influence of high and low saturated targets on cognitive performance, and the affecting extent of different saturated distractors of homogeneous colors on targets. According to the analysis of the reaction time through the non-parametric statistical method, a calculation method of the cognitive performance of each color is proposed. Based on the calculation of the color differences and the accumulation of the reaction times, it is shown that with the different saturated distractors of homogeneous colors, the high saturated yellow targets perform better than the low saturated ones, and the green and blue targets have moderate performances. When searching for a singleton target placed oll a black background, the color difference between the target and the distractor should be more than 20AE＊ab units in the yellow saturation coding, whereas the color difference should be more than 40△E＊ab units in the blue and green saturation coding. In addition, as regards saturation coding, the influence of the color difference between the target and the background on cognitive performance is greater than that of the color difference between the target and the distractor. Seemingly, the hue attribute determines whether the saturation difference between the target and the distractor affects thc cognitive performance. Based on the experimental results, the simulation design of the instrument dials in a flight situ

关键词： cognitive performance saturation level target color distractor color color difference

A Low-Complexity PTS Based on Greedy and Genetic Algorithm for OFDM Systems

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Chinese Journal of Electronics 2015年第4期24卷 857-861页

作者： LUO Renze ZHANG Chengsen niu Na LI rui State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University University of Electronic Science and Technology of China

Partial transmit sequence(PTS) is one of effective technique to reduce high Peak-to-average power ratio(PAPR) in Orthogonal frequency division multiplexing(OFDM) system. However, the complexity of Original PTS(O-PTS) increases exponentially with the number of sub-blocks. To reduce the computational complexity while still offering a lower PAPR, a new PTS method is proposed to search for suboptimal rotating vectors in this paper. In the proposed method, the candidate rotation vectors are generated based on greedy and genetic *** also combine the proposed method and the superimposed training sequence method to get a further PAPR reduction. The theory and simulations results show that the proposed method can achieve better PAPR reduction and significantly reduce the computational complexity.

关键词： PTS PAPR reduction OFDM Suboptimal rotating vectors

In-plane micro-sized energy storage devices:From device fabrication to integration and intelligent designs

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Journal of Energy Chemistry 2021年第12期30卷 25-39,I0002页

作者： Songshan Bi Hongmei Cao rui Wang Fang Wan Zhiqiang niu Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

The rapid development of micro-electronics raises the demand of their power sources to be simplified,miniaturized and highly integratable with other electronics on a ***-plane Micro-sized energy storage devices(MESDs),which are composed of interdigitated electrodes on a single chip,have aroused particular attentions since they could be easily integrated with other miniaturized electronics,reducing the complexity of overall chip design via removing complex interconnections with bulky power *** review highlights the achievements in the device fabrication of in-plane MESDs,as well as their integration and intelligent *** also discussed the current challenges and future perspectives for the development of in-plane MESDs.

关键词： Micro-sized energy storage devices Micro-batteries Micro-supercapacitors Integration Intelligent designs

Smart supercapacitors from materials to devices

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InfoMat 2020年第1期2卷 113-125页

作者： rui Wang Minjie Yao Zhiqiang niu Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjinChina

The recent development in smart electronic devices has increased the demand for supercapacitors to integrate with other different ***,many research efforts have been made to fabricate smart components of supercapacitors and to construct them into novel device *** this mini review,we summarize recent progress in smart supercapacitors with the functions of self-healing,shape memory,electrochromism,and photodetection,including the design of electrode materials,the optimization of the configuration,and working ***,the perspective and challenges for the development of smart supercapacitors are also discussed deeply.

关键词： electrochromism photodetection self-healing shape memory smarts

Preparation, characterization and antibacterial property of naringin loaded PLGA nanospheres

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Progress in Natural Science:Materials International 2022年第4期32卷 498-503页

作者： Shuo Wang Tianren xue Baolong niu Liqiao Wei Huifang Wang Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education Taiyuan University of Technology College of Materials Science and Engineering Taiyuan University of Technology

Naringin is a predominant flavanone in grapefruit and shows a variety of biological effects such as antioxidative,anticancer, anti-inflammatory and antibacterial activity. However, its application in pharmaceutical field is limited by low water solubility, poor bioavailability and instability. To overcome the problem, naringin has been encapsulated in poly(lactic-co-glycolic acid)(PLGA) polymer by emulsion-diffusion-evaporation method in this work. Moreover, naringin loaded PLGA nanospheres were characterized by scanning electron microscope(SEM),dynamic light scatter method(DLS), fourier transform infrared(FTIR) spectra, UV–vis spectra and fluorescence spectra of DNA-EB competition displacement. The mean diameter of PLGA nanospheres and NRG/PLGA nanospheres was 123 ± 25 nm and 137 ± 30 nm, respectively. The drug encapsulation efficiency was 86.4% while the drug loading rate was 22.3%. The fluorescence spectra of the competitive DNA-binding experiments revealed that the functional activity of naringin was retained after loaded in PLGA. It is revealed that the initial burst effect happened in the initial 24 h and followed by sustained release lasting for 10 days. Moreover, the nanospheres exhibited strong antibacterial activity, and 99.9% of E. coli and S. aureus were killed when treated with naringin loaded PLGA nanospheres at the concentration of 0.2 mg mL-1within 24 h. Furthermore, the viable cells remained only 48% when the concentration of NRG/PLGA nanospheres was 32 μg m L-1and NRG/PLGA nanospheres was important for inhibition of cancer cells. It is concluded that the stable naringin loaded PLGA nanospheres could have potential application in food industry and nanomedicine field.

关键词： Naringin PLGA Nanospheres Sustained release Antibacterial activity