检索结果-南通市图书馆

Chinese Journal of Chemistry 2024年第17期42卷 2035-2042页

作者： Haining Niu Liying Wang Zihan Zhang Yalei Liu yong shen Zhibo Li State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdaoShandong266042China Key Laboratory of Biobased Polymer Materials Shandong Provincial Education DepartmentQingdao University of Science and TechnologyQingdaoShandong266042China

Copolymerization as an efficient strategy can provide an opportunity to create new closed-loop recyclable polymeric materials with tailored properties that are generally inaccessible to the individual *** this contribution,the bulk ring-opening copolymerization of bio-renewable-caprolactone and trans-hexahydro-(4,5)-benzofuranone was achieved to produce closed-loop recyclable copolyesters by using an organobase/urea binary catalyst at room *** obtained copolyesters exhibited composition-dependent thermal ***,the obtained copolyesters were able to depolymerize back to recover the corresponding monomers under mild conditions.

关键词： Recyclable polymers Ring-opening polymerization Copolymerization Pressure-sensitive adhesives Aliphatic polyesters

Effect of distribution of fines on evolution of cooperation in spatial public goods game

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第9期33卷 239-245页

作者： Xing-Ping Sun Yan-Zheng Bi Hong-Wei Kang yong shen Qing-Yi Chen School of Software Yunnan UniversityKunming 650000China

In the realm of public goods game,punishment,as a potent tool,stands out for fostering *** it effectively addresses the first-order free-rider problem,the associated costs can be *** incur expenses in imposing sanctions,while defectors face ***,these monetary elements seemingly vanish into thin air,representing a loss to the system ***,by virtue of the redistribution of fines to cooperators and punishers,not only can we mitigate this loss,but the rewards for these cooperative individuals can be *** upon this premise,this paper introduces a fine distribution mechanism to the traditional pool punishment *** identical parameter settings,by conducting a comparative experiment with the conventional punishment model,the paper aims to investigate the impact of fine distribution on the evolution of cooperation in spatial public goods *** experimental results clearly demonstrate that,in instances where the punishment cost is prohibitively high,the cooperative strategies of the traditional pool punishment model may completely ***,the model enriched with fine distribution manages to sustain a considerable number of cooperative strategies,thus highlighting its effectiveness in promoting and preserving cooperation,even in the face of substantial punishment cost.

关键词： public goods game fine distribution cooperation

Monolithic integrated optoelectronic chip for vector force detection

在线全文

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2024年第3期10卷 245-257页

作者： Jiansong Feng Zhongqi Wang Mengyuan Zhanghu Xu Zhang yong shen Jing Yang Zhibin Li Bin Chen Taihong Wang Xiaolong Chen Zhaojun Liu Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina

Sensors with a small footprint and real-time detection capabilities are crucial in robotic surgery and smart wearable *** device footprint while maintaining its high performance is a major challenge and a significant limitation to their ***,we proposed a monolithic integrated micro-scale sensor,which can be used for vector force *** sensor combines an optical source,four photodetectors,and a hemispherical silicone elastomer component on the same sapphire-based AlGaInP *** chip-scale optical coupling is achieved by employing the laser lift-off techniques and the flip-chip bonding to a processed sapphire *** hemispherical structure device can detect normal and shear forces as low as 1mN within a measurement range of 0–220 mN for normal force and 0–15 mN for shear *** packaging,the sensor is capable of detecting forces over a broader range,with measurement capabilities extending up to 10 N for normal forces and 0.2 N for shear *** has an accuracy of detecting a minimum normal force of 25 mN and a minimum shear force of 20 ***,this sensor has been validated to have a compact footprint of approximately 1.5 mm^(2),while maintaining high real-time *** also demonstrate its promising potential by combining this sensor with fine surface texture perception in the fields of compact medical robot interaction and wearable devices.

关键词： robot force smart

Winter extreme precipitation over the Tibetan Plateau influenced by Arctic sea ice on interdecadal timescale

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Advances in Climate Change Research 2024年第4期15卷 42-51页

作者： Qing-Quan LI Miao BI Song YANG Qing-Yuan WU Yi-Hui DING Xin-yong shen Xiao-Ting SUN Meng-Chu ZHAO China Meteorological Administration Key Laboratory for Climate Prediction Studies National Climate CentreBeijing 100081China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and TechnologyNanjing 210044China CMA Key Open Laboratory of Transforming Climate Resources to Economy Chongqing Institute of Meteorological SciencesChongqing 401147China School of Atmospheric Sciences and Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Sun Yat-sen University Zhuhai 519082China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China

The Tibetan Plateau(TP)and the Arctic are the most sensitive regions to global climate ***,the interdecadal varibility of winter extreme precipitation over the TP and its linkage with Arctic sea ice are still *** this study,the characteristics and mechisnems of the TP extreme precipitation(TPEP)influenced by Arctic sea ice on interdecadal timescale are studied based on the daily precipitation,monthly sea ice concentration and ERA5 reanalysis data from 1980 to *** found that the dominant mode of the TPEP in winter mostly exhibits a uniform spatial variation on the interdecadal timescale,with an opposite weak variation in the southeastern TP,and the Arctic sea ice concentration(SIC)before 2002 are larger than that after *** interdecadal variation of TPEP is affected by two teleconnection wave trains regulated by the Barents and Kara Sea *** the light ice years,a remarkable positive geopotential height(HGT)anomaly appears over the Barents-Kara Sea and a remarkable negative HGT anomaly is located over the Lake *** wave trains originating over the Barents-Kara Sea can be *** southern branch forms a wave train through the North Atlantic along the subtropical westerly jet stream,showing a‘+-+-+'pattern of HGT anomalies from Arctic to the *** HGT anomaly controls the western TP,which creates dynamic and water vapor conditions for the *** northern branch forms a wave train through the Lake Baikal and the southeast of the TP,showing a‘+-+'HGT anomaly *** HGT anomaly controls the southeastern TP,which is not conducive to precipitation in the *** the SIC in the Barents-Kara Sea increases,the situation is *** above analysis also reveals the reason for the difference in the east-west distribution of the TPEP.

关键词： Arctic sea ice Tibetan Plateau Winter extreme precipitation Rossby wave activity Interdecadal variation

Biomimetic Phosphohydrolase Nanozyme Based on Defect-Engineered Metal-Organic Framework

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1821-1835页

作者： Xiaoxue Kou Yuhong Lin yong shen Linjing Tong Rui Gao Suya Liu Siming Huang Fang Zhu Guosheng Chen Gangfeng Ouyang MOE Key Laboratory of Bioinorganic and Synthetic Chemistry School of ChemistrySun Yat-sen UniversityGuangzhou 510006 Shanghai NanoPort Thermo Fisher ScientificPudong DistrictShanghai 200120 Guangzhou Municipal and Guangdong Provincial Key Laboratory of Molecular Target and Clinical Pharmacology The NMPA and State Key Laboratory of Respiratory DiseaseSchool of Pharmaceutical Sciences and The Fifth Affiliated HospitalGuangzhou Medical UniversityGuangzhou 511436

Phosphodiester bonds are the backbone linkages of all the nucleic acids which store and transfer biological *** hydrolysis of phosphodiester bonds is of great importance to the replication,recombination,and damage repair of DNA as well as the maturation and processing of ***,the spontaneous scission of individual phosphodiester linkages is kinetically challenging under physiological conditions,with an estimated half-life of 30 million ***,we discover a defect-engineered Zr-metal-organic framework(Zr-MOF)nanozyme containing cluster-missing reo defects,named UiO-66 REO,that possesses intrinsic phosphodiesterase-like activity that allows for the cleavage of the phosphodiester bond in physiological condition(pH=7.4 and 37℃),outperforming the activityrecording *** atomic-level structure of the UiO-66 REO nanozyme has been directly identified by the synchrotron radiation absorption spectrum and integrated differential phase contrast-scanning transmission electron *** find that both the defective boundary regions and unusual Zr6-clusters formed in the reo phase of the UiO-66 REO nanozyme contribute to the improvement in efficiency of phosphodiesterase-like hydrolysis,which realizes the cleavage of DNA in mild *** work offers a new insight into biomimetic enzymology using crystal and defect engineering and opens up new possibilities for the development of low-cost,structurally stable and sustainable phosphodiesterase nanozymes for different biological applications.

关键词： nanozyme metal-organic framework biomimetic catalysis hydrolase-like activity defective engineering

Computed tomography radiogenomics:A potential tool for prediction of molecular subtypes in gastric stromal tumor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第4期16卷 1296-1308页

作者： Xiao-Nan Yin Zi-Hao Wang Li Zou Cai-Wei Yang Chao-yong shen Bai-Ke Liu Yuan Yin Xi-Jiao Liu Bo Zhang Gastric Cancer Research Center West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Paediatric Surgery West China Hospital of Sichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Radiology West China HospitalSichuan UniversityChengdu 610041Sichuan ProvinceChina Department of Gastrointestinal Surgery Sichuan University West China HospitalChengdu 610041Sichuan ProvinceChina

BACKGROUND Preoperative knowledge of mutational status of gastrointestinal stromal tumors(GISTs)is essential to guide the individualized precision *** To develop a combined model that integrates clinical and contrast-enhanced computed tomography(CE-CT)features to predict gastric GISTs with specific genetic mutations,namely KIT exon 11 mutations or KIT exon 11 codons 557-558 *** A total of 231 GIST patients with definitive genetic phenotypes were divided into a training dataset and a validation dataset in a 7:3 *** models were constructed using selected clinical features,conventional CT features,and radiomics features extracted from abdominal CE-CT *** models were developed:ModelCT sign,modelCT sign+rad,and model CTsign+rad+*** diagnostic performance of these models was evaluated using receiver operating characteristic(ROC)curve analysis and the Delong *** The ROC analyses revealed that in the training cohort,the area under the curve(AUC)values for model_(CT sign),model_(CT sign+rad),and modelCT_(sign+rad+clinic)for predicting KIT exon 11 mutation were 0.743,0.818,and 0.915,*** the validation cohort,the AUC values for the same models were 0.670,0.781,and 0.811,*** predicting KIT exon 11 codons 557-558 deletions,the AUC values in the training cohort were 0.667,0.842,and 0.720 for model_(CT sign),model_(CT sign+rad),and modelCT_(sign+rad+clinic),*** the validation cohort,the AUC values for the same models were 0.610,0.782,and 0.795,*** on the decision curve analysis,it was determined that the model_(CT sign+rad+clinic)had clinical significance and *** Our findings demonstrate that the combined modelCT_(sign+rad+clinic)effectively distinguishes GISTs with KIT exon 11 mutation and KIT exon 11 codons 557-558 *** combined model has the potential to be valuable in assessing the genotype of GISTs.

关键词： Gastrointestinal stromal tumor Radiomics Gene mutation Computed tomography Model

生物基δ-己内酯与L-丙交酯顺序开环共聚制备热塑性弹性体及其性质研究

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高分子学报 2024年第5期55卷 582-593页

作者：王丽颖沈勇李志波生态化工国家重点实验室培育基地青岛科技大学化工学院山东省高等学校生物基高分子材料重点实验室青岛科技大学高分子科学与工程学院青岛266042

发展可再生、可降解脂肪族热塑性弹性体有望部分替代目前广泛使用的聚苯乙烯型热塑性弹性体材料,对于解决塑料污染问题具有重要意义.本工作以商品化的生物基单体δ-己内酯和L-丙交酯为原料,利用有机碱(t-BuP_(2))/脲二元催化体系实现其... 详细信息

发展可再生、可降解脂肪族热塑性弹性体有望部分替代目前广泛使用的聚苯乙烯型热塑性弹性体材料,对于解决塑料污染问题具有重要意义.本工作以商品化的生物基单体δ-己内酯和L-丙交酯为原料,利用有机碱(t-BuP_(2))/脲二元催化体系实现其顺序开环聚合,成功制备得到聚乳酸-b-聚(δ-己内酯)-b-聚乳酸三嵌段共聚物.这些三嵌段共聚物随软硬段比例不同表现出不同的力学性质.在硬段体积分数较高时(0.30

关键词：热塑性弹性体压敏胶三嵌段共聚物开环聚合脂肪族聚酯

New sustainable polymers with on-demand depolymerization property

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2024年第9期67卷 2803-2841页

作者： Yangyang Sun Zesheng An Yanshan Gao Rongrong Hu Ye Liu Hua Lu Xiao-Bing Lu Xuan Pang Anjun Qin yong shen Youhua Tao Yu-Zhong Wang Junpeng Wang Gang Wu Guang-Peng Wu Tie-Qi Xu Xing-Hong Zhang Yuetao Zhang Zhenbiao Zhang Jian-Bo Zhu Miao Hong Zhibo Li State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China State Key Laboratory Base of Eco-Chemical Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao266042China State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhou 510640China State Key Laboratory of Fine Chemicals Frontiers Science Center for Smart MaterialsDalian University of TechnologyDalian 116024China Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials(MoE) National Engineering Laboratory of Eco-Friendly Polymeric Materials(Sichuan)College of ChemistryState Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu 610064China School of Polymer Science and Polymer Engineering the University of AkronAkronOH 44325USA MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationSuzhou Key Laboratory of Macromolecular Design and Precision SynthesisCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

To combat the crisis of today's synthetic polymers arising from unsustainable production and disposal,it is essential for the synthetic polymer community to reshape the current polymer industry with sustainable *** an emerging class of sustainable polymers,the development of chemically depolymerizable polymers(CDPs),which can undergo closed-loop depolymerization/repolymerization cycles to reproduce virgin polymers without the loss of properties from recovered monomers,offers an ideal solution to preserve finite natural resources,provides a feasible solution to the end-of-life issue of polymer waste,and thereby establishes a circular materials ***,two grand key challenges have been encountered in the establishment of practically useful CDPs:how to balance polymerization and depolymerization ability and how to unify conflicted depolymerizability and physical ***,this critical review article presents our vision for summarizing feasible strategies to overcome the above two significant challenges and the design principles for constructing an ideal CDP by highlighting selected major progress made in this rapidly expanding field.

关键词： chemically depolymerizable polymers sustainable polymers depolymerization monomer recovery degradation plastics

针刺小肠俞募穴对动脉粥样硬化小鼠肠道菌群的影响

在线全文

学校读者我要写书评

暂无评论

中国老年学杂志 2024年第11期44卷 2659-2666页

作者：申永艳何贵新广西中医药大学研究生院广西中医药大学第一附属医院心血管内科

目的基于“心合小肠”理论，探讨针刺小肠俞募穴对小鼠动脉粥样硬化（AS）肠道菌群的影响。方法 19只C57BL/6J小鼠给予基础喂养作为正常对照（NC）组；64只相同遗传背景的载脂蛋白E基因敲除(ApoE-/-)小鼠予高脂喂养制备AS动物模型（造... 详细信息

目的基于“心合小肠”理论，探讨针刺小肠俞募穴对小鼠动脉粥样硬化（AS）肠道菌群的影响。方法 19只C57BL/6J小鼠给予基础喂养作为正常对照（NC）组；64只相同遗传背景的载脂蛋白E基因敲除(ApoE-/-)小鼠予高脂喂养制备AS动物模型（造模）组。持续喂养12 w后，从NC组和造模组各随机取4只小鼠，行主动脉根部苏木素-伊红（HE）染色鉴定是否造模成功。造模成功后，将造模组剩余60只AS模型小鼠随机分为模型对照（M）组、针刺（AC）组、阳性药物（PD）组、针刺联合阳性药物（ACPD）组，15只/组，继续高脂喂养。NC、M组不施加其他干预；AC组针刺小肠俞募穴，1次/d, 6 d为1个疗程，疗程间休1 d,共干预4个疗程；PD组给予阿托伐他汀钙溶液灌胃，1次/d,疗程同AC组；ACPD组予针刺小肠俞募穴加阿托伐他汀钙溶液灌胃。干预4个疗程后，检测各组血清三酰甘油（TG）、总胆固醇（TC）、低密度脂蛋白胆固醇（LDL-C）、高密度脂蛋白胆固醇（HDL-C）,观察各组血脂水平；行主动脉HE和油红O染色，观察小鼠主动脉根部病理形态变化和脂肪含量差异；取结肠未污染的粪便，行16 S rDNA高通量测序及生物信息学分析。结果血脂检测结果：与NC组比较，M组TG、 TC、 LDL-C水平明显升高，HDL-C水平明显降低（P<0.05）;与M组比较，PD组、ACPD组TG、TC、LDL-C水平明显降低，HDL-C水平明显升高（P<0.05）。HE染色：与NC组比较，M组血管内膜重度增厚，内壁见大量泡沫细胞聚集伴钙化，管腔重度狭窄；与M组比较，AC、PD、ACPD组血管内膜增厚度减轻，泡沫细胞减少。其中，ACPD组血管内膜厚度减轻最明显，泡沫细胞数量最少。油红O染色：与NC组比较，M组血管内膜重度增厚，大量脂质沉积及泡沫细胞聚集；与M组比较，AC、PD、ACPD组脂质沉积及泡沫细胞明显减少。其中，ACPD组血管内膜脂质沉积最少，泡沫细胞数量最少。肠道菌群检测：Alpha多样性结果表明，针刺可提高物种多样性，使菌群丰度升高。Beta多样性结果提示，各组肠道菌群之间存在显著差异。群落组成分析结果，在门水平，拟杆菌门在ACPD组占比最高，M组最低；厚壁菌门在M组占比最高，ACPD组最低；变形菌门在M组占比最高，AC组最低。在属水平，未分类的鼠杆菌属在ACPD组占比最高，M组最低；穆里巴库鲁姆菌属在ACPD组占比最高，NC组最低；毛螺菌属在M组占比最高，在ACPD组中最低。结论针刺小肠俞募穴能调节AS小鼠血脂水平及改善AS,可能是通过升高拟杆菌门、未分类的鼠杆菌属、穆里巴库鲁姆菌属，降低厚壁菌门、变形菌门、毛螺菌属的相对丰度而实现的；针刺小肠俞募穴调节肠道菌群是改善AS的有效途径。

关键词：针刺动脉粥样硬化肠道菌群俞募配穴

Discreet investors exert greater influence on cooperation in the public goods game

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2024年第3期33卷 170-178页

作者：康洪炜金展瑶李明远旺咩孙兴平沈勇陈清毅 School of Software Yunnan UniversityKunming 650000China College of Information Science and Engineering Northeastern UniversityShenyang 110004China

This paper studies the evolutionary process of cooperative behavior in a public goods game model with heterogeneous investment strategies in square *** the proposed model,players are divided into defectors,cooperators and discreet *** these,defectors do not participate in investing,discreet investors make heterogeneous investments based on the investment behavior and cooperation value of their neighbors,and cooperators invest equally in each *** real life,heterogeneous investment is often accompanied by time or economic *** discreet investors in this paper pay a certain price to obtain their neighbors'investment behavior and cooperation value,which quantifies the time and economic costs of the heterogeneous investment *** results of Monte Carlo simulation experiments in this study show that discreet investors can effectively resist the invasion of the defectors,form a stable cooperative group and expand the cooperative advantage in ***,when discreet investors pay too high a price,they lose their strategic *** results in this paper help us understand the role of heterogeneous investment in promoting and maintaining human social cooperation.

关键词： public goods game heterogeneous investment discreet investors cooperation