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Heteroepitaxial growth of Au@Pd core–shell nanocrystals with intrinsic chiral surfaces for enantiomeric recognition

Rare Metals 2024年第1期43卷 225-235页

作者： feng-Xia Wu feng-Hua Li Xia-Li Lv Qi-Xian Zhang Guo-Bao Xu Wen-Xin Niu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China Shaoxing Institute of Technology Shanghai UniversityShaoxing 312000China University of Science and Technology of China Hefei 230026China School of Materials Science and Engineering Shanghai UniversityShanghai 200436China Zhejiang Institute of Advanced Materials Shanghai UniversityJiashan 314113China University of Chinese Academy of Sciences Beijing 100039China

Noble metal surfaces with intrinsic chirality serve as an ideal candidate for investigating enantioselective chemistry due to their superior chemical durability and high catalytic ***,significant advance has been made in synthesizing metal nanocrystals with intrinsic ***,the majority reports are limited to ***,through a heteroepitaxial growth strategy,the synthesis of metal nanocrystals with intrinsic chirality to palladium was extended for the first time and their application in enantioselective recognition was *** heteroepitaxial growth strategy allows for transferring the chirality of homochiral Au nanocrystals to Au@Pd core–shell *** employing the chiral Au@Pd nanocrystals as enantiomeric recognizing elements,a series of electrochemical sensors for chiral discrimination were *** optimal conditions,the peak potential between D-dihydroxyphenylalanine(D-DOPA)and L-dihydroxyphenylalanine(L-DOPA)is about 80 m V,and the peak current of D-DOPA is 2 times as much as that of L-DOPA,which enables the determination of the enantiomeric excess(EE,%)of ***,this report not only introduces a heteroepitaxial growth strategy to synthesize metal nanocrystals with intrinsic chirality,but also demonstrates the superior capability of integrating intrinsic chirality and catalytic properties into metal nanocrystals for chiral recognition.

关键词： Core–shell nanostructures Chirality transfer Electrochemical sensors Chiral recognition Chiroplasmonics

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短波紫外线处理对青椒果实冷害的影响

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北方园艺 2021年第14期 107-115页

作者：赵雅琦孙文王清封碧红宁明岸左进华北京市农林科学院蔬菜研究中心农业农村部蔬菜产后处理重点实验室果蔬农产品保鲜与加工北京市重点实验室农业农村部华北地区园艺作物生物学与种质创制重点实验室北京100097 广西大学农学院广西南宁530004

以“丰田新秀”圆青椒为试材,采用0.25 kJ·m^(-2)剂量的UV-C辐照方法,研究了UV-C处理对青椒贮藏期间的冷害指数、失重率、硬度、可溶性固形物含量(TSS)、相对电导率、叶绿素含量、维生素C含量、过氧化物酶(POD)活性、过氧化氢酶(CAT)... 详细信息

以“丰田新秀”圆青椒为试材,采用0.25 kJ·m^(-2)剂量的UV-C辐照方法,研究了UV-C处理对青椒贮藏期间的冷害指数、失重率、硬度、可溶性固形物含量(TSS)、相对电导率、叶绿素含量、维生素C含量、过氧化物酶(POD)活性、过氧化氢酶(CAT)活性和抗坏血酸过氧化物酶(APX)活性的影响,以期为减轻青椒采后冷害提供参考依据。结果表明:0.25 kJ·m^(-2)剂量的UV-C处理可以有效降低青椒贮藏期的冷害指数,减少失重率,降低细胞膜损害,减缓了硬度的下降,抑制了青椒冷藏过程中可溶性固形物、叶绿素和维生素C含量的减少,同时,UV-C处理可有效维持了青椒冷藏过程中抗坏血酸过氧化物酶(APX)活性,提高了过氧化氢酶(CAT)和过氧化物酶(POD)活性。

关键词：青椒 UV-C处理贮藏冷害品质

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南宁主要香蕉种植基地土壤肥力调查与施肥建议

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热带农业科学 2018年第9期38卷 6-13页

作者：杨文慧封碧红韦文幸广西大学农学院广西南宁530004

香蕉具有速生高产,需肥量大的特性。营养充足、健康的土壤可以促进其生长及产量的提高。因此对香蕉土壤肥力状况进行调查与评估,对于指导当地农民进行合理施肥,提升土壤肥力和提高香蕉产量及经济效益具有重要的意义。结果表明:88.88%的... 详细信息

香蕉具有速生高产,需肥量大的特性。营养充足、健康的土壤可以促进其生长及产量的提高。因此对香蕉土壤肥力状况进行调查与评估,对于指导当地农民进行合理施肥,提升土壤肥力和提高香蕉产量及经济效益具有重要的意义。结果表明:88.88%的南宁地区香蕉种植基地土壤pH低于5.5; 40.74%的香蕉种植基地土壤有机质含量低于20g/kg;南宁主要香蕉种植基地土壤的铵态氮和硝态氮平均值分别为22.04和15.44 mg/kg,大多数南宁香蕉基地铵态氮含量高于硝态氮的含量,铵硝比不佳; 55.56%的香蕉种植基地土壤有效磷低于10 mg/kg;66.65%的基地土壤速效钾含量高于100 mg/kg; 70.37%的香蕉种植基地土壤交换性钙高于250 mg/kg; 62.97%的基地土壤交换性镁含量低于25 mg/kg。因此,为了提高南宁地区香蕉基地土壤肥力利用效果,实现香蕉产业可持续发展,提出了合理的施肥建议:适当施用石灰或碱性肥来改良土壤酸性,提高土壤pH,增施有机肥改善土壤肥力结构;氮肥以施用硝态氮肥为主,配合适当比例的铵态氮肥,增施磷肥、镁肥,合理施用钾肥,部分地区增施钙肥。

关键词：南宁香蕉基地土壤肥力分析

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Soluble ST2:A Novel Biomarker for Diagnosis and Prognosis of Cardiovascular Disease

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当代医学科学（英文） 2024年第4期44卷 669-679页

作者： Yin feng Li-qun HE Department of Cardiology Traditional Chinese and Western Medicine Hospital of WuhanTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China

The increasing incidence of cardiovascular disease(CVD)is a significant global health concern,affecting millions of individuals each *** diagnosis of acute CVD poses a formidable challenge,as misdiagnosis can significantly decrease patient survival *** biomarkers have played a vital role in the diagnosis and prognosis of CVDs,but they can be influenced by various factors,such as age,sex,and renal *** ST2(sST2)is a novel biomarker that is closely associated with different *** low reference change value makes it suitable for continuous measurement,unaffected by age,kidney function,and other confounding factors,facilitating risk stratification of ***,the combination of sST2 with other biomarkers can enhance diagnostic accuracy and prognostic *** review aims to provide a comprehensive overview of sST2,focusing on its diagnostic and prognostic value as a myocardial marker for different types of CVDs and discussing the current limitations of sST2.

关键词： cardiovascular disease combined biomarker diagnosis and prognosis limitations soluble ST2

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不同预冷方式对甜玉米储藏品质的影响

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食品科学 2022年第15期43卷 218-226页

作者：时文林赵雅琦闫志成左进华袁树枝史君彦王清封碧红广西大学农学院广西南宁530000 北京市农林科学院蔬菜研究中心农业农村部蔬菜产后处理重点实验室果蔬农产品保鲜与加工北京市重点实验室农业农村部华北地区园艺作物生物学与种质创制重点实验室农业农村部都市农业(北方)重点实验室北京100097

为探究不同预冷方式对甜玉米储藏品质的影响,本研究采用3种预冷方式(冷库预冷、压差预冷和流态冰预冷)处理甜玉米,测定其预冷过程中的温度变化,预冷后将甜玉米储藏于0℃冷库,测定其储藏期间感官品质、色泽、呼吸速率、乙烯产生速率、可... 详细信息

为探究不同预冷方式对甜玉米储藏品质的影响,本研究采用3种预冷方式(冷库预冷、压差预冷和流态冰预冷)处理甜玉米,测定其预冷过程中的温度变化,预冷后将甜玉米储藏于0℃冷库,测定其储藏期间感官品质、色泽、呼吸速率、乙烯产生速率、可溶性固形物(total soluble solid,TSS)质量分数以及可溶性淀粉、可溶性糖、葡萄糖、果糖、蔗糖含量的变化。结果表明,流态冰预冷在储藏期间保鲜效果最佳,其次是压差预冷。流态冰预冷可快速降低甜玉米内部温度,延缓苞叶黄化,保持籽粒色泽,维持其感官品质,抑制甜玉米呼吸和乙烯释放速率;此外,流态冰预冷可以较好地维持甜玉米籽粒TSS质量分数及可溶性淀粉、可溶性糖、葡萄糖、果糖和蔗糖的含量。在储藏第28天时,流态冰预冷组TSS质量分数为13.8%,压差预冷组为13.4%,冷库预冷组为13.1%,流态冰预冷组显著高于其他组(P0.05);同时,流态冰预冷组的蔗糖含量为120.4 mg/g,压差预冷组为118.0 mg/g,而冷库预冷组仅为92.3 mg/g,流态冰预冷处理甜玉米蔗糖含量高于其他两种处理,压差预冷次之,冷库预冷处理蔗糖含量在储藏末期较低,由此可见,流态冰预冷处理可以明显延缓甜玉米储藏品质劣变。综上,本研究为甜玉米预冷方式的选择提供了理论依据。

关键词：甜玉米流态冰预冷压差预冷冷库预冷感官品质营养品质

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Ellagic acid inhibits gastric cancer cells by modulating oxidative stress and inducing apoptosis

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Asian Pacific Journal of Tropical Biomedicine 2024年第4期14卷 162-169页

作者： Jian Zheng Chun-feng Li Department of Diagnostic Radiology Division Harbin Medical University Cancer HospitalHeilongjiangChina Department of Gastrointestinal Surgical Ward Harbin Medical University Cancer HospitalHeilongjiangChina

Objective:To evaluate the anticancer effect of ellagic acid on gastric cancer ***:MTT assay was used to evaluate the effect of ellagic acid at different concentrations(0.5-100μg/mL)on gastric cancer AGS ***-qPCR and Western blot analyses were applied to assess apoptosis(BCL-2,CASP-3,and BAX)and autophagy(LC3,ATG5,and BECN1)in AGS cells treated with ellagic *** expression of invasion-related markers including TP53,CDKN2A,and PTEN was *** addition,cell cycle markers including cyclin A,B,D,and E were measured by *** stress markers were evaluated using ***:Ellagic acid inhibited the proliferation of AGS cells in a concentration-and time-dependent *** expression of BCL-2 was significantly decreased(P0.05).Moreover,the oxidative stress markers including SOD,TAC,and MDA were increased by ellagic acid(P<0.01).Conclusions:Ellagic acid can inhibit cell proliferation,induce apoptosis,and modulate oxidative stress in AGS ***,further in vivo and molecular studies are needed to verify its anticancer efficacy.

关键词： Ellagic acid Gastric cancer Apoptosis Autophagy Metastasis Proliferation

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A Random Fusion of Mix 3D and Polar Mix to Improve Semantic Segmentation Performance in 3D Lidar Point Cloud

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Computer Modeling in Engineering & Sciences 2024年第7期140卷 845-862页

作者： Bo Liu Li feng Yufeng Chen School of Computer Science and Engineering Macao University of Science and TechnologyMacao999078China School of Computer Science and Artificial Intelligence Chaohu UniversityChaohu238000China Institute of Vehicle Information Control and Network Technology Hubei University of Automotive TechnologyShiyan442002China

This paper focuses on the effective utilization of data augmentation techniques for 3Dlidar point clouds to enhance the performance of neural network *** point clouds,which represent spatial information through a collection of 3D coordinates,have found wide-ranging *** augmentation has emerged as a potent solution to the challenges posed by limited labeled data and the need to enhance model generalization *** of the existing research is devoted to crafting novel data augmentation methods specifically for 3D lidar point ***,there has been a lack of focus on making the most of the numerous existing augmentation *** this deficiency,this research investigates the possibility of combining two fundamental data augmentation *** paper introduces PolarMix andMix3D,two commonly employed augmentation techniques,and presents a new approach,named *** of using a fixed or predetermined combination of augmentation methods,RandomFusion randomly chooses one method from a pool of options for each instance or *** innovative data augmentation technique randomly augments each point in the point cloud with either PolarMix or *** crux of this strategy is the random choice between PolarMix and Mix3Dfor the augmentation of each point within the point cloud data *** results of the experiments conducted validate the efficacy of the RandomFusion strategy in enhancing the performance of neural network models for 3D lidar point cloud semantic segmentation *** is achieved without compromising computational *** examining the potential of merging different augmentation techniques,the research contributes significantly to a more comprehensive understanding of how to utilize existing augmentation methods for 3D lidar point *** data augmentation technique offers a simple yet effective method to leverage the diversity of augmentation techniques and boost the ro

关键词： 3D lidar point cloud data augmentation RandomFusion semantic segmentation

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Voltage-modulated polymer nanopore field-effect transistor for multi-sized nanoparticle detection

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Nanotechnology and Precision Engineering 2024年第3期7卷 79-89页

作者： feng Zhou Lin Li Qiannan Xue State Key Laboratory of Precision Measurement Technology and Instruments School of Precision Instruments and Optoelectronics EngineeringTianjin UniversityTianjin 300072China

Solid-state nanopores offer a range of distinct advantages over biological nanopores,such as structural diversity and greater stability and durability;this makes them highly promising for high-resolution nanoparticle *** nanopores can exhibit gating characteristics with stress-responsive switches and can demonstrate specificity toward particular *** inspiration from biological nanopores,this paper introduces a novel polymer nanopore with field-effect characteristics,leveraging a conductive polymer in its construction to showcase intriguing gating ***,in this device,the polymer layer serves as the gate,enabling precise control over the source–drain current response inside and outside the pore by simply adjusting the gate *** unique feature allows fine-tuning of the nanopore’s sensitivity to nanoparticles of varying sizes and facilitates its operation in multiple *** results reveal that the developed polymer nanopore field-effect transistor demonstrates remarkable selectivity in detecting nanoparticles of various sizes under different applied *** proposed single device demonstrates the exceptional ability to detect multiple types of nanoparticle,showcasing its immense potential for a wide range of applications in biological-particle analysis and medical diagnostics.

关键词： Nanopipette Polymer nanopore Voltage modulation Nanoparticle detection

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On m-ovoids of finite classical polar spaces with an irreducible transitive automorphism group

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Science China Mathematics 2024年第3期67卷 683-712页

作者： Tao feng Weicong Li Ran Tao School of Mathematical Sciences Zhejiang UniversityHangzhou 310027China Department of Mathematics and National Center for Applied Mathematics Shenzhen Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Cryptologic Technology and Information Security Ministry of EducationShandong UniversityQingdao 266237China School of Cyber Science and Technology Shandong UniversityQingdao 266237China

In this paper, we classify the m-ovoids of finite classical polar spaces that admit a transitive automorphism group acting irreducibly on the ambient vector space. In particular, we obtain several new infinite familie... 详细信息

关键词： transitive m-ovoids irreducible action finite classical polar spaces primitive divisor

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SMSTracker:A Self-Calibration Multi-Head Self-Attention Transformer for Visual Object Tracking

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Computers, Materials & Continua 2024年第7期80卷 605-623页

作者： Zhongyang Wang Hu Zhu feng Liu School of Communications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing210003China

Visual object tracking plays a crucial role in computer *** recent years,researchers have proposed various methods to achieve high-performance object *** these,methods based on Transformers have become a research hotspot due to their ability to globally model and contextualize ***,current Transformer-based object tracking methods still face challenges such as low tracking accuracy and the presence of redundant feature *** this paper,we introduce self-calibration multi-head self-attention Transformer(SMSTracker)as a solution to these *** employs a hybrid tensor decomposition self-organizing multihead self-attention transformermechanism,which not only compresses and accelerates Transformer operations but also significantly reduces redundant data,thereby enhancing the accuracy and efficiency of ***,we introduce a self-calibration attention fusion block to resolve common issues of attention ambiguities and inconsistencies found in traditional trackingmethods,ensuring the stability and reliability of tracking performance across various *** integrating a hybrid tensor decomposition approach with a self-organizingmulti-head self-attentive transformer mechanism,SMSTracker enhances the efficiency and accuracy of the tracking *** results show that SMSTracker achieves competitive performance in visual object tracking,promising more robust and efficient tracking systems,demonstrating its potential to providemore robust and efficient tracking solutions in real-world applications.

关键词： Visual object tracking tensor decomposition transformer self-attention

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