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What Can Topology Bring to Chemistry?

CCS Chemistry 2024年第9期6卷 2084-2109页

作者： Wei Wang Songtao Zhou Xiujun Yu Qing-Hui Guo Yanhang Ma Jie Song Liang Zhang Xuzhou Yan Lu Han Qing Liao xiaopeng Li Wen-Bin Zhang Yiyong mai Shaodong Zhang Shunai Che Hai-Bo Yang Xuefeng Fu Mei-Xiang Wang School of Chemistry and Molecular Engineering East China Normal UniversityShanghai 200062 Hangzhou Institute of Medicine Chinese Academy of SciencesHangzhou 310022Zhejiang College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060Guangdong MOE Key Laboratory of Bioorganic Phosphorous and Chemical Biology Department of ChemistryTsinghua UniversityBeijing 100084 School of Physical Science and Technology and Shanghai Key Laboratory of High-Resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210 School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesState Key Laboratory of Composite MaterialsShanghai Key Laboratory for Molecular Engineering of Chiral DrugsShanghai Jiao Tong UniversityShanghai 200240 School of Chemical Science and Engineering Tongji UniversityShanghai 200092 Beijing Key Laboratory for Optical Materials and Photonic Devices Department of ChemistryCapital Normal UniversityBeijing 100048 Beijing National Laboratory for Molecular Sciences Key Laboratory of Polymer Chemistry and Physics of Ministry of EducationCenter for Soft Matter Science and EngineeringCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871 Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 10085

The unique mathematical perspectives and principal concepts of topology have not only promoted the development of other branches of mathematics but have also deeply influenced other subjects,particularly physics and *** minireview aims to elucidate the substantial influence of topology on chemistry by critically examining both the contributions of topology to current chemical science and its potential future *** will discuss the topology of molecular structures and assemblies across various scales—from small molecules and mechanically interlocked molecules to polymers,biomacromolecules,and supramolecular *** discussion will include an exploration of cutting-edge techniques for characterizing topological features,underscoring the role of topology as a novel paradigm for the design and synthesis of new molecular ***,a critical analysis of topology’s role in the development of functional materials—such as photonic materials,polymers,biomacromolecules,and chiral materials—will demonstrate its emerging significance as a crucial parameter in unveiling novel properties and *** topology’s formidable potential,it is anticipated to be used increasingly to address pivotal challenges within chemistry and adjacent disciplines.

关键词： chemical topology topological invariants molecular graphs links and knots structureproperty relationship

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Nocardia cyriacigeorgica infection in a patient with pulmonary sequestration: A case report

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World Journal of Clinical Cases 2021年第10期9卷 2367-2372页

作者： Jian Lin xiao-mai Wu Min-Fei Peng Department of Respiratory and Critical Care Medicine Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical UniversityLinhai 317000Zhejiang ProvinceChina Department of Clinical Laboratory Taizhou Hospital of Zhejiang Province Affiliated to Wenzhou Medical UniversityLinhai 317000Zhejiang ProvinceChina

BACKGROUND Nocardia cyriacigeorgica (N. cyriacigeorgica) infection is uncommon in clinicalpractice. Pulmonary sequestration complicated with N. cyriacigeorgica has notbeen reported in the literature. Here, we present a case of pulmonary sequestrationcomplicated with N. cyriacigeorgica infection in an *** SUMMARYA 37-year-old woman complaining of a recurrent cough was admitted to ourhospital. Pulmonary sequestration in the lower lobe of the left lung wasdiagnosed by enhanced computed tomography. Bronchoalveolar lavage fluid wasthen collected, which showed gram positive bacilli with weakly positive modifiedacid-fast staining. The pathogen was identified as N. cyriacigeorgica after bacterialculture and mass spectrometry analysis. The patient was diagnosed withpulmonary sequestration complicated with N. cyriacigeorgica infection, and hersymptoms quickly improved following anti-infective *** Nocardiosis is considered to be an opportunistic infection. This is the first reportof pulmonary sequestration complicated with N. cyriacigeorgica infection in apatient with normal immunity.

关键词： Nocardia Infection Pulmonary sequestration Nocardia cyriacigeorgica Lung Case report

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内镜下圈套器联合异物钳全层切除治疗胃底小间质瘤临床疗效分析

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中国医疗器械信息 2024年第2期30卷 70-72页

作者：李迈天津市第四中心医院天津300140

目的:探讨内镜下圈套器联合异物钳全层切除治疗胃底小间质瘤临床疗效。方法:回顾性纳入2017年1月~2023年1月于本院接受内镜治疗胃底小间质瘤患者52例,根据内镜手术方案差异分为两组:对照组20例采用黏膜下隧道内镜切除术治疗,试验组32例... 详细信息

目的:探讨内镜下圈套器联合异物钳全层切除治疗胃底小间质瘤临床疗效。方法:回顾性纳入2017年1月~2023年1月于本院接受内镜治疗胃底小间质瘤患者52例,根据内镜手术方案差异分为两组:对照组20例采用黏膜下隧道内镜切除术治疗,试验组32例采用内镜下圈套器联合异物钳全层切除治疗;比较两组手术时间、术中出血量、完整切除率、创面完全愈合率及围手术期并发症发生率。结果:试验组手术时间和术中出血量均显著少于对照组(P0.05)。结论:相较于黏膜下隧道内镜切除术,内镜下圈套器联合异物钳全层切除治疗胃底小间质瘤具有操作简便、手术用时短及医源性创伤小等优势,同时整体疗效及安全性接近。

关键词：内镜下治疗圈套器异物钳间质瘤

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Coating performance on glutaraldehyde-modified wood

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Journal of Forestry Research 2019年第1期30卷 353-361页

作者： Zefang xiao Haiou Chen Carsten mai Holger Militz Yanjun Xie Key Laboratory of Bio-based Material Science and Technology (Ministry of Education) Northeast Forestry University Wood Biology and Wood Products Burckhardt–InstituteGeorg August University of G?ttingen

Scots pine(Pinus sylvestris L.) panels were modified with glutaraldehyde(GA) to various weight percent gains and subsequently coated with several commercial coatings. The drying rate and adhesion of the coatings on the modified wood were measured; the coated/modified woods were exposed outdoors to analyze how the wood modifications influence the coating deterioration. The results showed that GA modification caused an increase in the drying rate of the waterborne coatings, but had no influence on drying of tested solvent-borne coatings. GAmodification did not change the dry adhesion but reduced the wood strength in a pull-off test. Wet adhesion of waterborne coatings was improved, while that of the solvent-borne coatings tended to be somewhat reduced. During 22 months of outdoor weathering, the coated/modified samples exhibited lower moisture content than the coated/unmodified samples, but GA modification didn't contribute a substantially synergistic effect with surface coatings on resistance to weathering.

关键词： Chemical modification Glutaraldehyde Coating Adhesion Weathering

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Enhancing sensitivity of triple-negative breast cancer to DNA-damaging therapy through chemical inhibition of the m6A methyltransferase METTL3

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Cancer Communications 2024年第2期44卷 282-286页

作者： Bianca Cesaro Alessia Iaiza Fabio Piscopo Marco Tarullo Eleonora Cesari Dante Rotili Antonello mai Alberto Diana Michela Londero Luca Del Giacco Riccardo Masetti Alba Di Leone Chiara Naro Silvia Masciarelli Giulia Fontemaggi Claudio Sette Francesco Fazi Alessandro Fatica Department of Anatomical HistologicalForensic&Orthopedic SciencesSection of Histology&Medical EmbryologySapienza University of RomeRomeItaly Department of Biology and Biotechnologies“Charles Darwin” Sapienza University of RomeRomeItaly GSTeP Organoids Research Core Facility Fondazione Policlinico A.Gemelli Istituto di Ricovero e Cura a Carattere Scientifico(IRCCS)RomeItaly Department of Drug Chemistry and Technologies Sapienza University of RomeRomeItaly Pasteur Institute Cenci-Bolognetti FoundationSapienza University of RomeRomeItaly Department of BioSciences University of MilanMilanItaly Multidisciplinary Breast Center Dipartimento Scienze della Salute della Donna e del Bambino e di SanitàPubblicaCatholic University of the Sacred HeartRomeItaly Department of Neuroscience Section of Human AnatomyCatholic University of the Sacred HeartRomeItaly Oncogenomic and Epigenetic Unit IRCCS Regina Elena National Cancer InstituteRomeItaly

Dear Editor,N 6-methyladenosine(m^(6)A)is a critical mRNA modi-fication catalyzed by the enzyme methyltransferase-like 3(METTL3),with implications in RNA ***3 upregulation is associated with cancer progres-sion,metast... 详细信息

关键词： cancer methyltransferase metastasis

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Apple detection from apple tree image based on BP neural network and Hough transform

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International Journal of Agricultural and Biological Engineering 2015年第6期8卷 46-53页

作者： xiao Changyi Zheng Lihua Li Minzan Chen Yuan mai Chunyan Key Laboratory of Modern Precision Agriculture System Integration Research Ministry of EducationChina Agricultural UniversityBeijing100083China

Using machine vision to accurately identify apple number on the tree is becoming the key supporting technology for orchard precision production *** adapting to the complexity of the field environment in various detection situations,such as illumination changes,color variation,fruit overlap,and branches and leaves shading,a robust algorithm for detecting and counting apples based on their color and shape modes was ***,BP(back propagation)neural network was used to train apple color identification *** the irrelevant background was removed by using the trained neural network model and the image only containing the apple color pixels was *** apple edge detection was carried out after morphological operations on the obtained ***,the image was processed by using circle Hough transform algorithm,and apples were located with the help of calculating the center coordinates of each apple edge *** validation experimental results showed that the correlation coefficient of R2 between the proposed approaches based counting and manually counting reached *** illustrated that the proposed algorithm could be used to detect and count apples from apple trees’images taken in field environment with a high precision and strong anti-jamming feature.

关键词： apple detecting and counting BP neural network Hough transform color segmentation edge detection

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各向异性纤维素纳米纤维/芳纶纳米纤维复合泡沫的制备与性能

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复合材料学报 2024年第6期41卷 3011-3020页

作者：林旭麦学妍王钧余雁张雪霞福建农林大学材料工程学院福州350002

纤维素纳米纤维(CNF)泡沫材料因其轻质、可生物降解、可再生性以及优良的隔热性能等特点,在保温隔热领域备受关注。但是CNF泡沫存在力学性能差、热稳定性差、易燃等缺点,在一定程度限制了其实际应用。本文通过将CNF与芳纶纳米纤维(ANF)... 详细信息

纤维素纳米纤维(CNF)泡沫材料因其轻质、可生物降解、可再生性以及优良的隔热性能等特点,在保温隔热领域备受关注。但是CNF泡沫存在力学性能差、热稳定性差、易燃等缺点,在一定程度限制了其实际应用。本文通过将CNF与芳纶纳米纤维(ANF)进行复合,通过冰模板法和冷冻干燥技术制备了具有各向异性结构的CNF/ANF复合泡沫。探究了ANF添加量和各向异性结构的引入对复合泡沫微观结构、力学性能、热稳定性和隔热性能的影响。结果表明,当CNF和ANF的质量比为2∶1时,CNF/ANF复合泡沫具有超低的密度(12.25 mg/cm^(3))、良好的力学强度(纵向压缩强度为74.56 kPa)和优异的隔热性能(25.2 mW/(m·K)),此外,该复合泡沫还具有良好的热稳定性和自熄灭性能,这些特性赋予了其在保温隔热等领域更加广阔的应用前景。

关键词：泡沫材料芳纶纳米纤维纤维素纳米纤维定向冷冻隔热自熄灭

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Effect of Polynomial Expressed Distribution Dust Particles for Unmagnetized Two-Ion-Temperature Dusty Plasma

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Communications in Theoretical Physics 2009年第8期52卷 346-350页

作者： HE Guang-Jun LI xiao-Li LIN mai-mai SHI Yu-Ren DUAN Wen-Shan Department of Physics Northwest Normal University Lanzhou 730070 China

Linear dispersion relation for linear wave and a Kadomtsev-Petviashvili (KP) equation for nonlinearwave are given for the unmagnetized two-ion-temperature cold dusty plasma with many different dust grain *** numerical results of variations of linear dispersion with respect to the different dust size distribution are ***,how the amplitude,width,and propagation velocity of solitary wave vary vs different dust size distribution isalso studied numerically in this paper.

关键词： polynomial expressed dust size distribution linear dispersion relation Kadomtsev-Petviashvili (KP) equation

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Symptomatic COVID-19 in University Students: A School-Wide Web-Based Questionnaire Survey during the Omicron Variant Outbreak

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Advances in Infectious Diseases 2024年第1期14卷 133-146页

作者： mai Kitahara Hisami Sameshima Rie Tanuma Kumi Setoyama Yuka Yamaguchi Akiyo Kamachi Satoko Nakamura Mayuko Sakuma Yoichi Kawaike Tamotsu Furuya Shinji Ijichi Health Service Center Kagoshima University Kagoshima Japan Center for Management of Information Technologies Kagoshima University Kagoshima Japan

Aim: To detect risk and preventive factors associated with the Omicron variant infection in university students, a combination of a web-based survey and multivariate logistic regression analysis was introduced as the front-line initiatives by the school health practitioners. Design: Questionnaire survey. Methods: The school-wide web-based questionnaire survey was conducted among our university students as a part of the annual health check-up in April, 2023. The positive outcome was confined to the first symptomatic COVID-19 onset during the Omicron variant outbreak. Results: In this self-administered survey, risk or protective associations were merely estimated statistically in university students (n = 5406). In measured factors, karaoke and club/group activities could maintain the statistical significance in adjusted odds ratios (ORs) as relative risk factors, and science course, measles/ rubella (MR) vaccination, and COVID-19 vaccination remained as relative protective factors in adjusted OR analyses. Club/group activities with member gathering and karaoke sing-along sessions in university students may frequently have WHO’s three Cs. These risk factors are still important topics for the infection control of COVID-19 in university students. Together with some recent reports from other researchers, the significant protective role of MR vaccine in our survey warrants further clinical investigation. If the breakthrough infection continuously constitutes the majority of infection, real data in test-negative case-control or web-based questionnaire design continue to be important for statistical analysis to determine the minimal requirement of our strategies which may be equivalent to or replace COVID-19 vaccines.

关键词： Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Coronavirus Disease 2019 (COVID-19) Omicron Variant Risk Behaviors Protective Factors

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黑臭水体沉积物中新型溴代阻燃剂的污染特征

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中国环境科学 2024年第7期44卷 3945-3954页

作者：黄晨晨曾艳红管克兰刘银娥鲁祺鸿汪善全罗孝俊麦碧娴中国矿业大学环境与测绘学院江苏徐州221116 中国科学院广州地球化学研究所有机地球化学国家重点实验室与广东省资源环境利用与保护重点实验室广东广州510640 中山大学环境科学与工程学院广东广州510006

测定了中国74个城市的173条黑臭水体沉积物中6种新型溴代阻燃剂(NBFRs)的污染现状.结果表明,十溴二苯乙烷(DBDPE)是沉积物中主要的NBFRs,其浓度范围为未检出~603.76ng/g干重,平均浓度占比高达(99.49±0.82)%;六溴苯(HBB)和五溴甲苯(PBT... 详细信息

测定了中国74个城市的173条黑臭水体沉积物中6种新型溴代阻燃剂(NBFRs)的污染现状.结果表明,十溴二苯乙烷(DBDPE)是沉积物中主要的NBFRs,其浓度范围为未检出~603.76ng/g干重,平均浓度占比高达(99.49±0.82)%;六溴苯(HBB)和五溴甲苯(PBT)占比较低.NBFRs的组成符合其在中国的生产和使用情况.尽管DBDPE、HBB和PBT均在不同城市间具有显著的浓度差异,但是总体呈现东部高(华南、华东和东北地区)、西部低(西北和西南地区)的分布格局,各地区的产业结构和城市化率是控制其空间分布的重要因素.DBDPE作为多溴联苯醚十溴工业品(BDE209)的替代品,其在沉积物中的浓度仍普遍低于BDE209,且DBDPE/BDE209比值与各城市的生产总值和工业产值呈显著的负相关关系.生态风险评价表明黑臭水体沉积物中DBDPE、HBB和PBT均不足以对水生生物造成暴露风险.

关键词：城市黑臭水体表层沉积物新型溴代阻燃剂污染特征生态风险评估

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