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Synthesis of micro/meso porous carbon for ultrahigh hydrogen adsorption using cross-linked polyaspartic acid

Frontiers of Chemical Science and Engineering 2020年第5期14卷 857-867页

作者： Jun Wei Jianbo zhao Di Cai Wenqiang Ren Hui Cao Tianwei Tan National Energy Research and Development Center for Biorefinery Beijing University of Chemical TechnologyBejing 100029China Engineering Laboratory of Chemical Resources Utilization in South Xinjiang of Xinjiang Production and Construction Corps College of Life SciencesTarim UniversityAlar 843300China Research Center for Eco-Environmental Sciences Chinese Academy of ScienceBejing 100085China

In addition to the specific surface area,surface topography and characteristics such as the pore size,pore size distribution,and micro/mesopores ratio are factors that determine the performance of porous carbons(PCs)in the fields of energy,catalysis,and *** on the mechanism of weight loss of polyaspartic acid at high temperatures,this study provided a new method for adjusting the surface morphology of PCs by changing the cross-linking ratio of the precursor,where cross-linked polyaspartic acid was used as precursor without additional activating agents.N2 adsorption analysis indicated that the specific surface area of the obtained PCs was as high as 1458 m2·g-1,of which I 200 m2·g-1was the contribution of the microporous area and the highest pore volume was 1.13 cm3·g-1,of which the micropore volume was 0.636cm3·*** thermogravimetric analysis results of the precursor,and also the scanning electron microscopy and Brunauer-Emmet-Teller analysis results of the carboniza-tion product confirmed that the prepared PCs presented multilevel pore structure,and the diameters of most pores were 0.78 and 3.97 nm;moreover,the pore size distribution was relatively *** conferred the PCs the ultrahigh hydrogen adsorption capacity of up to 4.52 wt-%at 77 K and 1.13 bar,in addition to their great energy storage and catalytic potental.

关键词： porous carbon multilevel pores polyaspartic acid cross-linking hydrogen adsorption

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川芎嗪对脊髓损伤大鼠铁死亡的调控作用及机制

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中国组织工程研究 2024年第26期28卷 4158-4163页

作者：陶经纬周婧雅赵毅任敬佩胡传宇徐林穆晓红范筱北京中医药大学东直门医院北京市100700 青岛市市立医院山东省青岛市266011

背景:研究表明脊髓损伤与铁死亡存在密切联系,而川芎嗪具有调控氧化还原反应的功能。目的:探究川芎嗪对脊髓损伤大鼠铁死亡的调控作用及机制。方法:将36只雌性SD大鼠随机分为假手术组、模型组及川芎嗪组,每组12只。模型组、川芎嗪组大... 详细信息

背景:研究表明脊髓损伤与铁死亡存在密切联系,而川芎嗪具有调控氧化还原反应的功能。目的:探究川芎嗪对脊髓损伤大鼠铁死亡的调控作用及机制。方法:将36只雌性SD大鼠随机分为假手术组、模型组及川芎嗪组,每组12只。模型组、川芎嗪组大鼠采用改良Allen’s法建立脊髓损伤模型,造模后分别腹腔注射生理盐水、川芎嗪注射液,1次/d,连续治疗28d;假手术组不建模也不进行治疗。结果与结论:①川芎嗪组治疗14,21,28 d的运动功能BBB评分低于假手术组(PmRNA与蛋白表达水平均降低(PmRNA与蛋白表达水平均升高(P<0.05);⑥治疗28 d的免疫荧光染色显示,假手术组大鼠脊髓组织神经元特异性核蛋白表达最多,模型组大鼠脊髓组织神经元特异性核蛋白表达最少;⑦结果表明,川芎嗪可通过调控铁死亡改善脊髓损伤大鼠的运动功能并起到神经保护作用。

关键词：川芎嗪脊髓损伤铁死亡神经保护作用氧化应激

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Tissue specific prediction of N^(6)-methyladenine sites based on an ensemble of multi-input hybrid neural network

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BIOCELL 2022年第4期46卷 1105-1121页

作者： CANGZHI JIA DONG JIN XIN WANG QI zhao School of Science Dalian Maritime UniversityDalian116026China School of Computer Science and Software Engineering University of Science and Technology LiaoningAnshan114051China

N^(6)-methyladenine is a dynamic and reversible post translational modification,which plays an essential role in various biological *** of the current inability to identify m6A-containing mRNAs,computational approaches have been developed to identify m6A sites in DNA *** to improve prediction performance,we introduced a novel ensemble computational approach based on three hybrid deep neural networks,including a convolutional neural network,a capsule network,and a bidirectional gated recurrent unit(BiGRU)with the self-attention mechanism,to identify m6A sites in four tissues of three *** a total of 11 datasets,we selected different feature subsets,after optimized from 4933 dimensional features,as input for the deep hybrid neural *** addition,to solve the deviation caused by the relatively small number of experimentally verified samples,we constructed an ensemble model through integrating five sub-classifiers based on different training *** compared through 5-fold cross-validation and independent tests,our model showed its superiority to previous methods,im6A-TS-CNN and iRNA-m6A.

关键词： m6A sites Deep hybrid neural networks Ensemble model Feature selection

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Experimental Study of Thermal-Hydraulic-mechanical Coupling Behavior of High-Performance Concrete

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Fluid Dynamics & materials Processing 2023年第9期19卷 2417-2430页

作者： Wei Chen Wenhao zhao Yue Liang Frederic Skoczylas School of Civil Engineering Architecture and EnvironmentHubei University of TechnologyWuhan430068China CNRS Centrale LilleUMR9013-LaMcube-Laboratoire de Mécanique Multiphysique et MultiéchelleUniversitéde LilleLilleF-59000France

The design of an underground nuclear waste disposal requires a full characterization of concrete under various thermo-hydro-mechanical-chemical *** experimental work studied the characterization of coupled thermo-hydro-mechanical effects using concretes made with cement CEm I or CEm V/A(according to European norms).Uniaxial and triaxial compression under 5 mPa conﬁning pressure tests were performed under three dif-ferent temperatures(T=20℃,50℃,and 80℃).The two concretes were dried under relative humidity(RH)to obtain a partially saturated state of approximately 70%.The results showed that the effects of water saturation and conﬁning pressure are more important than that of *** in high RH at different target tempera-tures led to an increase in uniaxial and triaxial strength but drying at 105℃ had a negative effect on the strength and Young’s *** drying caused microcracking in the *** microcracks deeply inﬂuenced the thermal damage to the material,affecting its mechanical *** triaxial strength clearly increased due to the presence of conﬁning ***,an important inﬂuence of cement type was observed on the mechanical properties;the concrete based on CEm V/A had a greater porosity than CEm I,and aﬁner pore struc-ture appeared due to the presence of mineral admixtures.

关键词： Concrete temperature saturation uniaxial compression triaxial compression

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Regulatory effect and mechanism of gastrin and its antagonists on colorectal carcinoma

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World Journal of Gastroenterology 1999年第5期5卷 408-416页

作者： He SW Shen KQ He YJ Xie B zhao Ym Third mil med Univ Daping Hosp Dept Gen Surg Chongqing 400042 Peoples R China Third mil med Univ Inst Surg Res Chongqing 400042 Peoples R China

AIm:To explore the effect and mechanism of gastrin and its antagonists prog lumide and somatostatin on colorectal carcinoma and their clinical ***:A model of transplanted human colonic carcinoma was established from SW480 cell line in gymnomouse *** volume and weight of transplanted carcinoma was observed under the effect of pentagatrin (PG), proglumide (PGL) and octapeptide somotostatin (SmS201-995, SmS). The cAmP content of carcinoma cell was determined by radioimmunoassay and the DNA, protein content and cell cycle were determined by flow-cytometry. The amount of viable cells was determined by mTT colorimetric analysis,IP(3) content was determined by radioimmunoassay, Ca(2+) concentration in cell by fluorometry and PKC activity by isotopic enzymolysis. The expression of gastrin, c-myc, c-fos and rasP21 in 48 cases of colorectal carcinoma tissue was detected by the immuno-cytochemistry SP method. Argyrophilia nucleolar organizer regions was determined with argyrophilia ***:The volume,weight, cAmP, DNA and protein content in carcinoma cell, cell amount and proliferation index of S and G(2)m phase in PG group were all significantly higher than those of control group. When PG was at the concentration of 25mg/L, the amount of viable cells, IP(3) content and Ca(2+) concentration in cell and membrane PKC activity in PG group were significantly higher than those in control group; when PGL was at a concentration of 32mg/L, they dropped to the lowest level in PG (25mg/L)+PGL group, but without significant difference from the control group. The positive expression rate of gastrin, c-myc, c-fos and rasP21 in carcinoma tissue was 39.6%, 54.2%, 47.9% and 54.2% respectively and significantly higher than that in mucosa 3cm and 6cm adjacent to carcinoma tissue and normal colorectal mucosa. The positive expression rate of gastrin of highly differentiated adenocarcinoma group was significantly higher than that of poorly differentiated and mucinous ad

关键词： colorectal neoplasms gastrin proglumide somatostatin IP_3, Ca^(2+) protein kinase C oncogene AgNORs

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Digital and analog memory devices based on 2D layered mPS_(3) (m= mn, Co, Ni) materials

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Chinese Physics B 2021年第4期30卷 487-491页

作者： Guihua zhao Li Wang Xi Ke Zhiyi Yu School of Electronics and Information Technology Sun Yat-sen UniversityGuangzhou 510006China School of microelectronics Science and Technology Sun Yat-sen UniversityZhuhai 519082China School of materials and Energy Guangdong University of TechnologyGuangzhou 510006China School of Chemistry and Chemical Engineering Neijiang Normal UniversityNeijiang 641100China

We demonstrate digital and analog devices with an Ag/mPS_(3)/Au structure based on layered mPS_(3)(m=mn,Co,Ni)2 D *** devices show the bipolar behavior of resistive *** addition,Ag/mnPS_(3)/Au and Ag/NiPS_(3)/Au devices show synaptic characteristics of potentiation and *** digital and analog characteristics of resistance states enable Ag/mPS_(3)/Au devices to work as both binary memory and artificial synapse *** Ag/mPS_(3)/Au memory devices are promising for applications of flexible eye-like and brain-like systems on a chip when they are integrated with photodetectors and FETs composed of full mPS_(3) materials.

关键词： electrochemical metallization memory memristor 2D materials neuromorphic computing

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Effects of short photoperiod on energy intake,thermogenesis,and reproduction in desert hamsters(Phodopus roborovskii)

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Integrative Zoology 2015年第2期10卷 207-215页

作者： Xueying ZHANG Zhijun zhao Nina VASILIEVA Anastasia KHRUSHCHOVA Dehua WANG State Key Laboratory of Integrated management for Pest Insects and Rodents Institute of ZoologyChinese Academy of SciencesBeijingChina A.N.Severtsov Institute of Ecology and Evolution Russian Academy of SciencesMoscowRussia College of Life and Environmental Science Wenzhou UniversityWenzhouChina

Desert hamsters(Phodopus roborovskii)are the least known species in the genus Phodopus with respect to ecology and physiology,and deserve scientific attention,particularly because of their small body ***,the responses of energy metabolism and reproductive function to short photoperiods in desert hamsters were *** and female desert hamsters were acclimated to either long day(LD)(L:D 16:8 h)or short day(SD)photoperiods(L:D 8:16 h)for three months,and then the females were transferred back to an LD photoperiod for a further five months,while at the end of the SD acclimation the males were killed and measurements were taken for serum leptin as well as molecular markers for *** found that like the other two species from the genus Phodopus,the desert hamsters under SD decreased body mass,increased adaptive thermogenesis as indicated by elevated mitochondrial protein content and uncoupling protein-1 content in brown adipose tissue,and suppressed reproduction compared to those under ***,different from the other two species,desert hamsters did not show any differences in energy intake or serum leptin concentration between LD and *** data suggest that different species from the same genus respond in different ways to the environmental signals,and the desert adapted species are not as sensitive to change in photoperiod as the other two species.

关键词： desert hamster(Phodopus roborovskii) energy intake leptin reproductive function uncoupling protein-1

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Terahertz metamaterial Sensor Based on Electromagnetically Induced Transparency Effect

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Journal of Electronic Science and Technology 2015年第2期13卷 117-121页

作者： Shao-Xian Li Hong-Wei zhao Jia-Guang Han Center for Terahertz wave Key laboratory of Opto-electronic Information Science and TechnologyMinistry of EducationCollege of Precision Instrument and Optoelectronics EngineeringTianjin University Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of Sciences

A terahertz metamaterial sensor adopting the metamaterial-based electromagnetically induced transparency（EIT） effect is presented for determining the 1,4-dioxane concentration in its aqueous solution. The metamaterial sensor, which consists of an EIT element unit with a cut-wire metallic resonator and two split-ring metallic resonators fabricated on a 490-μm thick silicon substrate, operates in a transmission geometry. The EIT peak was red-shifted and decreased with the increase of the water volume. A maximum redshift about 54 GHz of the EIT peak was detected between the 1,4-dioxane and water. The presented linear behavior and high sensitivity of the EIT peak depending on the water concentration pave a novel avenue for sensor applications.

关键词： metallic terahertz resonator transparency determining fabrication split shifted aligned lithography

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Quantitative evaluation of extrinsic factors influencing electrical excitability in neuronal networks： Voltage Threshold measurement method(VTmm)

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Neural Regeneration Research 2018年第6期13卷 1026-1035页

作者： Shuai An Yong-Fang zhao Xiao-Ying Lu Zhi-Gong Wang State Key Laboratory of Bioelectronics Southeast University Nanjing Jiangsu Province China Institute of RF- & OE-ICs Southeast University Nanjing Jiangsu Province China Co-innovation Center of Neuroregeneration Nantong University Nantong Jiangsu Province China

The electrical excitability of neural networks is influenced by different environmental factors. Effective and simple methods are required to objectively and quantitatively evaluate the influence of such factors, including variations in temperature and pharmaceutical dosage. The aim of this paper was to introduce ‘the voltage threshold measurement method＇, which is a new method using microelectrode arrays that can quantitatively evaluate the influence of different factors on the electrical excitability of neural networks. We sought to verify the feasibility and efficacy of the method by studying the effects of acetylcholine, ethanol, and temperature on hippocampal neuronal networks and hippocampal brain slices. First, we determined the voltage of the stimulation pulse signal that elicited action potentials in the two types of neural networks under normal conditions. Second, we obtained the voltage thresholds for the two types of neural networks under different concentrations of acetylcholine, ethanol, and different temperatures. Finally, we obtained the relationship between voltage threshold and the three influential factors. Our results indicated that the normal voltage thresholds of the hippocampal neuronal network and hippocampal slice preparation were 56 and 31 m V, respectively. The voltage thresholds of the two types of neural networks were inversely proportional to acetylcholine concentration, and had an exponential dependency on ethanol concentration. The curves of the voltage threshold and the temperature of the medium for the two types of neural networks were U-shaped. The hippocampal neuronal network and hippocampal slice preparations lost their excitability when the temperature of the medium decreased below 34 and 33°C or increased above 42 and 43°C, respectively. These results demonstrate that the voltage threshold measurement method is effective and simple for examining the performance/excitability of neuronal networks.

关键词： nerve regeneration threshold voltage microelectrode array electrical excitability of neural networks acetylcholine alcohol temperature hippocampal neuronal network hippocampal slice electrical stimulation action potentials neural regeneration

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In-plane corrugated cosine honeycomb for 1D morphing skin and its application on variable camber wing

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Chinese Journal of Aeronautics 2013年第4期26卷 935-942页

作者： Liu Weidong Zhu Hua Zhou Shengqiang Bai Yalei Wang Yuan zhao Chunsheng State Key Laboratory of mechanics and Control of mechanical Structures Nanjing University of Aeronautics and Astronautics Institute of Science PLA University of Science and Technology

A novel 0-Poisson＇s ratio cosine honeycomb support structure of flexible skin is proposed. mechanical model of the structure is analyzed with the energy method, finite element method （FEm） and experiments have been performed to validate the theoretical model. The in-plane characteristics of the cosine honeycomb are compared with accordion honeycomb through analytical models and experiments. Finally, the application of the cosine honeycomb on a variable camber wing is studied. Studies show that mechanical model agrees well with results of FEm and experiments. The transverse non-dimensional elastic modulus of the cosine honeycomb increases （decreases） when the wavelength or the wall width increases （decreases）, or when the amplitude decreases （increases）. Compared with accordion honeycomb, the transverse non-dimensional elastic modulus of the cosine honeycomb is smaller, which means the driving force is smaller and the power consumption is less during deformation. In addition, the cosine honeycomb can satisfy the deform- ing requirements of the variable camber wing.

关键词： Cosine honeycomb Flexible skin mechanical properties morphing wing Smart structure

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