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Tailoring the surface and interface structures of photocatalysts to enhance hydrogen production

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Science China Chemistry 2024年第4期67卷 1161-1174页

作者： Tao Zhang pengfei Wang Shuai Yue Fei Li Zhiyong zhao Sihui Zhan MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and EngineeringNankai UniversityTianjin 300350China

Photocatalytic water splitting using semiconductor photocatalysts is a promising approach for the production of carbon-neutral,sustainable and clean hydrogen ***,the separation and transport of photoinduced carriers are generally considered to be rate-limiting steps,and their low efficiency remains a major ***,much effort has been devoted to developing new strategies in surface/interface engineering of photocatalysts to improve the dynamics of charge separation/*** feature article briefly summarizes recent advances in photocatalyst surface/interface engineering by our research group,which have been achieved through the design of various novel photocatalysts,including interfacial modulation,heterostructure construction,heteroatom doping,single atom and diatom *** article is divided into three parts:first,we briefly introduce the three key processes involved in solar water splitting and reveal relationships between the properties of nanostructural photocatalysts and the fundamentals of water splitting;second,we detail methods and strategies for surface and interfacial structures to improve the efficiency of the fundamental processes,especially charge separation;finally,we explore prospects for photocatalytic water splitting *** article provides a valuable resource and strategies for researchers currently working in the field of photocatalytic water splitting.

关键词： photocatalytic water splitting surface/interface structures dual-functional photocatalysis

Design and experimental study of the end-effector for broccoli harvesting

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 137-144页

作者： Xiong zhao Gangji Xu pengfei Zhang Gaohong Yu Yadan Xu Faculty of Mechanical Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Key Laboratory of Transplanting Equipment and Technology of Zhejiang Province Hangzhou 310018China Hangzhou vocational&Technical College Hangzhou 310018China

The end-effector is an important part of the broccoli harvesting *** at the physical characteristics of a large broccoli head and thick stem,a spherical cutting tool broccoli harvesting end-effector was designed in this ***,the physical characteristics of broccoli were tested,and physical parameters such as the broccoli head diameter and stem diameter of broccoli were *** maximum cutting force of broccoli stems under different cutting angles was ***,according to the physical characteristics and harvesting process of broccoli,the end-effector was designed,and the mathematical model of kinematics and dynamics was *** on the results of dynamic analysis,the end-effector rod was optimized,and the unilateral width of the slider was 40 mm,the length of the connecting rod was 120 mm,and the length of the crank was 42 *** mechanism needed an external driving force of 140.54 N to cut the broccoli ***,a 32 mm cylinder with a load rate of 50%was selected as the power ***,the feasibility of the broccoli harvesting end-effector was verified by the harvesting *** showed that the overall harvesting success rate of the end-effector is 93.3%,and the smoothness rate of the stem section is 83.3%.The harvesting performance of the broccoli end-effector was *** lays a foundation for agricultural robots to harvest broccoli.

关键词： harvesting robot broccoli end-effector dynamic analysis mechanism optimization

Manipulating Na occupation and constructing protective film of P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2) as long-term cycle stability cathode for sodium-ion batteries

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Journal of Energy Chemistry 2024年第1期88卷 603-611,I0013页

作者： Yiran Sun pengfei Zhou Siyu Liu Zhongjun zhao Yihao Pan Xiangyan Shen Xiaozhong Wu Jinping zhao Junying Weng Jin Zhou School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 0255000ShandongChina School of Materials Science and Engineering Shandong University of TechnologyZibo 255049ShandongChina

P2-Na_(0.67)Ni_(0.33)Mn_(0.67)O_(2)(NNMO)is promising cathode material for sodium-ion batteries(SIBs)due to its high specific capacity and fast Na+diffusion ***,the irreversible P2-O_(2)phase transformation,Na+/vacancy ordering,and transition metal(TM)dissolution seriously damage its cycling stability and restrict its commercialization ***,Na occupation manipulation and interface stabilization are proposed to strengthen the phase structure of NNMO by synergistic Zn/Ti co-doping and introducing lithium difluorophosp(LiPO_(2)F_(2))film-forming electrolyte *** Zn/Ti co-doping regulates the occupancy ratio of Nae/Nafat Na sites and disorganizes the Na+/vacancy ordering,resulting in a faster Na+diffusion kinetics and reversible P2-Z phase transition for P2-Na_(0.67)Ni_(0.28)Zn_(0.05)Mn_(0.62)Ti_(0.05)O_(2)(NNZMTO).Meanwhile,the LiPO_(2)F_(2)additive can form homogeneous and ultrathin cathode-electrolyte interphase(CEI)on NNZMTO surface,which can stabilize the NNZMTO-electrolyte interface to prevent TM dissolution,surface structure transformation,and micro-crack *** studies of in situ and ex situ characterizations and theoretical calculations were used to elucidate the storage mechanism of NNZMTO with Li PO_(2)F_(2)*** a result,the NNZMTO displays outstanding capacity retention of 94.44%after 500 cycles at 1C with 0.3 wt%Li PO_(2)F_(2),excellent rate performance of 92.5 mA h g^(-1)at 8C with 0.1 wt%Li PO_(2)F_(2),and remarkable full cell *** work highlights the important role of manipulating Na occupation and constructing protective film in the design of layered materials,which provides a promising direction for developing high-performance cathodes for SIBs.

关键词： Layered cathode Zn/Ti co-doping Na occupation Electrolyte additive Sodium-ion batteries

circGLS抑制非小细胞肺癌细胞恶性表型的作用研究

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遵义医科大学学报 2024年第4期47卷 324-331,323页

作者：龙开君赵鹏飞王凯宋永祥陈成柯希贤遵义医科大学附属医院胸外科贵州遵义563000

目的明确circGLS的环状RNA特性及其环化位点,研究circGLS对NSCLC细胞恶性表型的影响。方法采用Northern-Blot、RNase R耐受实验检测circGLS的耐RNase R消化特性,使用Sanger测序明确其环化位点。分别使用Vector、OE-circGLS慢病毒感染H46... 详细信息

目的明确circGLS的环状RNA特性及其环化位点,研究circGLS对NSCLC细胞恶性表型的影响。方法采用Northern-Blot、RNase R耐受实验检测circGLS的耐RNase R消化特性,使用Sanger测序明确其环化位点。分别使用Vector、OE-circGLS慢病毒感染H460和H1299细胞,使用sh-NC及sh-circGLS感染A549和H1975细胞,分组为Control组、Vector组、OE-circGLS组、sh-NC组和sh-circGLS组。采用CCK-8、流式细胞术、划痕和Transwell实验检测上述分组中细胞增殖、凋亡、迁移和侵袭情况。结果Northern-Blot、RNase R消化和Sanger测序实验证实了circGLS耐受RNase R消化,且环化位点为“GA”。RT-qPCR结果证实细胞模型构建成功。CCK-8结果显示,H1299和H460细胞72 h OE-circGLS组细胞活力分别为0.88和0.9;A549和H1975细胞72 h sh-circGLS组活力均为1.13(Vector组和sh-NC组细胞活力均一化为1)。划痕实验结果显示,H460和H1299细胞愈合率分别为:OE-circGLS组vs Vector组=2.42%vs 5.57%和12.09%vs 25.07%;A549和H1975细胞愈合率分别为:sh-circGLS组vs sh-NC组=19.00%vs 13.81%和30.69%vs 21.53%。Transwell实验结果显示,H460细胞和H1299细胞迁移率(OD)分别为:OE-circGLS组vs Vector组=0.94 vs 1.01和0.57 vs 0.92;H1975细胞和A549细胞迁移率(OD)分别为:sh-circGLS组vs sh-NC组=1.044 vs 0.95和1.29 vs 1.09。流式细胞术结果显示,H1299细胞和H460细胞凋亡率分别为:OE-circGLS组vs Vector组=14.45%vs 7.54%和10.74%vs 1.79%;A549细胞和H1975细胞凋亡率分别为:sh-circGLS组vs sh-NC组=8.57%vs 9.52%和2.47%vs 4.95%。上述结果表明,过表达circGLS可以显著抑制NSCLC细胞增殖、迁移和侵袭,且促进其凋亡,而敲低circGLS得到相反的结果。结论circGLS是一个真实存在的环状RNA,具有抑制NSCLC细胞恶性表型的功能,是潜在的非小细胞肺癌治疗靶点。

关键词：环状RNA circGLS 非小细胞肺癌恶性表型

Nanowire-based synaptic devices for neuromorphic computing

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Materials Futures 2023年第2期2卷 94-108页

作者： Xue Chen Bingkun Chen pengfei zhao Vellaisamy A L Roy Su-Ting Han Ye Zhou Institute of Microscale Optoelectronics Shenzhen UniversityShenzhen 518060People’s Republic of China College of Physics and Optoelectronic Engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China School of Science and Technology Hong Kong Metropolitan UniversityHong KongSARPeople’s Republic of China College of Electronics and Information Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Institute for Advanced Study Shenzhen UniversityShenzhen 518060People’s Republic of China

The traditional von Neumann structure computers cannot meet the demands of high-speed big data processing;therefore,neuromorphic computing has received a lot of interest in recent ***-inspired neuromorphic computing has the advantages of low power consumption,high speed and high *** human brains,the data transmission and processing are realized through *** synaptic devices can be adopted to mimic the biological synaptic ***(NW)is an important building block for nanoelectronics and optoelectronics,and many efforts have been made to promote the application of NW-based synaptic devices for neuromorphic ***,we will introduce the current progress of NW-based synaptic memristors and synaptic *** applications of NW-based synaptic devices for neuromorphic computing will be *** challenges faced by NW-based synaptic devices will be *** hope this perspective will be beneficial for the application of NW-based synaptic devices in neuromorphic systems.

关键词： nanowires synapse memristor transistor neuromorphic computing

Effect of arteriosclerotic intracranial arterial vessel wall enhancement on downstream collateral flow

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Chinese Medical Journal 2023年第18期136卷 2221-2228页

作者： Liqun Yan Jin Yan Zhenchang Wang Guoshi Wang Zhenzhong Li Yaping Hou Boyuan Huang Qianbo Dong Xiaodan Mu Wei Cao pengfei zhao Department of Radiology Beijing Friendship Hospital of Capital Medical UniversityBeijing 100050China Departments of Medical Imaging Second Hospital of Hebei Medical UniversityShijiazhuangHebei 050004China Department of Clinical Medicine Tianjin Medical UniversityTianjin 300203China Departments of Neurology Second Hospital of Hebei Medical UniversityShijiazhuangHebei 050004China Hebei Province Blood Center ShijiazhuangHebei 050000China

Background:The effect of arteriosclerotic intracranial arterial vessel wall enhancement(IAVWE)on downstream collateral flow found in vessel wall imaging(VWI)is not *** of the mechanism underlying IAVWE on VWI,damage to the patient’s nervous system caused by IAVWE is likely achieved by affecting downstream cerebral blood *** present study aimed to investigate the effect of arteriosclerotic IAVWE on downstream collateral ***:The present study recruited 63 consecutive patients at the Second Hospital of Hebei Medical University from January 2021 to November 2021 with underlying atherosclerotic diseases and unilateral middle cerebral artery(MCA)M1-segment stenosis who underwent an magnetic resonance scan within 3 days of symptom *** patients were divided into 4 groups according to IAVWE and the stenosis ratio(Group 1,n=17;Group 2,n=19;Group 3,n=13;Group 4,n=14),and downstream collateral flow was analyzed using three-dimensional pseudocontinuous arterial spin labeling(3D-pCASL)and RAPID *** National Institutes of Health Stroke Scale(NIHSS)scores of the patients were also ***-factor multivariate analysis of variance using Pillai’s trace was used as the main statistical ***:No statistically significant difference was found in baseline demographic characteristics among the ***,but not the stenosis ratio,had a statistically significant significance on the late-arriving retrograde flow proportion(LARFP),hypoperfusion intensity ratio(HIR),and NIHSS scores(F=20.941,P<0.001,Pillai’s trace statistic=0.567).The between-subject effects test showed that IAVWE had a significant effect on the three dependent variables:LARFP(R^(2)=0.088,F=10.899,P=0.002),HIR(R^(2)=0.234,F=29.354,P<0.001),and NIHSS(R^(2)=114.339,F=33.338,P<0.001).Conclusions:Arteriosclerotic IAVWE significantly reduced downstream collateral flow and affected relevant neurological *** was an independent factor affecting downstream collateral fl

关键词： Intracranial arterial vessel wall enhancement Arteriosclerosis Stroke Cerebral collateral flow Three-dimensional pseudo-continuous arterial spin-labeling Magnetic Resonance Imaging

Anti-psoriasis molecular targets and active components discovery of Optimized Yinxieling Formula via affinity-purified strategy

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Chinese Journal of Natural Medicines 2024年第2期22卷 127-136页

作者： WANG Wei LIU Lijuan YANG Zhuo LU Chuanjian TU pengfei zhao Ruizhi ZENG Kewu State Key Laboratory of Natural and Biomimetic Drugs School of Pharmaceutical SciencesPeking UniversityBeijing 100191China State Key Laboratory of Dampness Syndrome of Chinese Medicine The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510006China

Psoriasis,a prevalent inherited skin condition,involves an inflammatory response as a key pathogenic *** Optimized Yinxieling Formula(OYF),rooted in traditional Chinese medicine,is extensively utilized in clinical settings to treat *** previous studies have demonstrated OYF’s significant anti-inflammatory effects in psoriasis,its potential molecular targets and active components remain *** study aimed to unveil the anti-psoriasis molecular targets and active components of *** findings indicated that OYF extract markedly reduced the production of several inflammatory mediators,including IL-23,nitric oxide,TNF-α,and IL-1β,in LPS-induced RAW264.7 *** synthesized OYF extract-crosslinked beads to isolate pharmacological targets from RAW264.7 lysates using an affinity purification strategy,known as Target *** enriched target proteins were subsequently identified via LC-MS/MS,followed by bioinformatics analysis to map the psoriasis-associated pathway-gene *** identified a total of 76 potential target proteins,which were highly associated with mRNA transcription *** particular,pathway-gene network analysis revealed that the IL-23 inflammatory pathway was involved in the anti-psoriasis effect of OYF *** further utilized a target protein-based affinity capture strategy,combined with LC-MS and SPR analysis,to globally screen OYF’s active components,focusing on the mRNA transcription regulator,fused in sarcoma(FUS).This process led to the identification of umbelliferone,vanillic acid,protocatechuic acid,gentisic acid,and echinacoside as key compounds targeting FUS to inhibit IL-23 ***,we formulated a compound cocktail(CpdC),which significantly reduced psoriasis area and severity index(PASI)scores and the expressions of IL-23 and Ki67 in an imiquimod(IMQ)-induced psoriasis mouse ***,our study elucidates the primary molecular targets and active components of OYF,offeri

关键词： Psoriasis Optimized Yinxieling Formula(OYF) FUS protein Molecular targets Affinity-purified strategy

基于主成分分析的72份中强筋小麦面粉加工品质综合评价

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中国种业 2024年第5期 72-78页

作者：韩雪孔欣欣杨丹丹赵国轩苏亚中赵鹏飞金建猛邱学领于俊杰赵国建开封市农林科学研究院河南开封475004

为有效评价不同中强筋小麦品种面粉加工品质的差异,以72份中强筋小麦品种为研究对象,对10个小麦面粉加工品质性状进行考察,利用变异系数分析、相关性分析、主成分分析、聚类分析对供试材料面粉加工品质进行综合评价并对其分类。结果表明... 详细信息

为有效评价不同中强筋小麦品种面粉加工品质的差异,以72份中强筋小麦品种为研究对象,对10个小麦面粉加工品质性状进行考察,利用变异系数分析、相关性分析、主成分分析、聚类分析对供试材料面粉加工品质进行综合评价并对其分类。结果表明,在10个品质性状指标中,容重的变异系数最小(1.64%),稳定时间的变异系数最大(50.17%);各品质性状间呈现不同程度的相关性,蛋白质含量与湿面筋含量相关性最强(0.94)。通过主成分分析将10个品质性状划分为3个主成分因子,累计贡献率达83.16%,可代表中强筋小麦10个品质性状指标的大部分信息;第1主成分可概括为蛋白质质量因子,第2主成分为高容重、低弱化度因子,第3主成分为吸水率因子。聚类分析将72份小麦品种分为三大类群,类群Ⅰ表现为高稳定时间特征,聚集了37个小麦品种;类群Ⅱ聚集了综合品质表现较差的28个小麦品种,整体表现为低吸水率、低沉降值、低稳定时间、低形成时间的特征;类群Ⅲ聚集小麦品种最少,共7个品种,其湿面筋含量、吸水率、稳定时间表现适中。

关键词：中强筋小麦面粉加工品质主成分分析聚类分析综合评价

Optimization design and experiment of the variable differential gear train planting mechanism

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INTERNATIONAL JOURNAL OF AGRICULTURAL AND BIOLOGICAL ENGINEERING 2024年第2期17卷 85-93页

作者： zhao, Xiong Liu, Ziwei Jia, Yuanwu Ma, Xingxiao Zhang, pengfei Chen, Jianneng Zhejiang Sci Tech Univ Sch Mech Engn Hangzhou 310018 Peoples R China Zhejiang Sci Tech Univ Fac Mech Engn & Automat Hangzhou 310018 Peoples R China Xi An Int Univ Engn Coll Xian 710077 Peoples R China Hangzhou Vocat & Tech Coll Hangzhou 310018 Peoples R China

In order to improve the adaptability of the planting mechanism for different plant spacings, a variable differential gear train planting mechanism based on precise pose and trajectory control was proposed by combining the open chain 2R rod group and the variable differential gear train. According to the pose requirements of receiving seedling point, transporting seedling point and planting point, three precise pose points of constrained planting trajectory were determined. Through the three-position motion generation structural synthesis method, combined with computer-aided optimization design software, a set of mechanism parameters that meet the planting requirements were optimized. Based on the optimized mechanism parameters, by only changing the coordinates of two trajectory shape control points, three planting trajectories with key point position information adapted to 300 mm, 400 mm and 500 mm plant spacing were obtained by interpolation, and three pairs of total transmission ratio of three groups of variable differential gear trains were calculated. When distributing the total transmission ratio of the mechanism, the fixed axis gear train and the differential gear train are combined. The fixed axis gear train included a pair of non-circular gear pairs and a pair of positive gear pairs, which were convenient for disassembly and assembly. The former drives the sun gear at variable speed, and the latter drives the planet carrier at uniform speed. Based on this structure, the transmission ratio of the positive gear pair is -1, and the transmission ratio of the differential gear train is 0.5. The sub-transmission ratio of the single-stage non-circular gear pair was calculated and the pitch curves of three pairs of noncircular gears were solved. Three pairs of non-circular gear pairs with different transmission ratios were replaced in turn and three sets of planting mechanisms were modeled in three dimensions. The virtual prototype motion simulation was completed by

关键词： plant spacing planting mechanism variable differential gear train precise pose trajectory control parameter optimization SEEDLING TRANSPLANTING MECHANISM