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Design and preparation of a crosslinkable,oil-resistant,and bio-based elastomer from fumarate

Science China Chemistry 2024年第2期67卷 622-631页

作者： Hui Yang Haijun Ji Xinxin Zhou Shihan Yang Liwei Li chaoying sun Weiwei Lei Runguo Wang Liqun Zhang Beijing State Key Laboratory of Organic-Inorganic Composites&Beijing Laboratory of Biomedical Materials Beijing University of Chemical TechnologyBeijing100029China Hubei Key Laboratory of Polymer Materials Faculty of Materials Science and EngineeringHubei UniversityWuhan430062China

Poly(diethyl fumarate-co-methoxyethyl acrylate-co-vinyl chloroacetate)(PDEFMV),a novel bio-based elastomer with a saturated structure,was synthesized via redox emulsion *** glass-transition temperatures of PDEFMV,adjusted through the variation of the diethyl fumarate-to-methoxyethyl acrylate feeding ratio,ranged from-36.1 to-14.8 ℃.The number-average molecular weights of PDEFMV ranged from 384,000 to 46,000 g/*** designing the molecular structure,vinyl chloroacetate was used to provide active sites for subsequent vulcanization and *** active chlorine groups within the PDEFMV chain reacted with the crosslinking agent trithiocyanuric acid under high temperature and pressure to form a nonsulfur crosslinked three-dimensional network *** achieve the desired properties,carbon black(CB,N330) was incorporated to reinforce PDEFMV,leading to the formation of PDEFMV/CB composites.A comprehensive study was conducted on the high-temperature oil resistance of PDEFMV/CB *** immersion in IRM903 oil at temperatures of 150 and 200 ℃ for 72 h,the mass and volume changes in PDEFMV/CB were lower than those observed in commercially available acrylate rubber(AR)/CB,indicating that PDEFMV exhibited superior oil ***,the aging characteristics and mechanisms of oil resistance in the PDEFMV/CB and AR/CB composites were investigated at different temperatures(150,200,and 250 ℃).The results provide insights into the operational temperature ranges suitable for PDEFMV/CB and offer valuable guidance for potential industrial applications.

关键词： diethyl fumarate molecular design bio-based elastomer solvent-free synthetic route high-temperature oil resistance

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LE FEU CHEZ RABELAIS

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法国研究 1989年第3期 38-44,37页

作者： sun chaoying

Le feu est un élément important dans la mythologie rabelaisienne; il éblouit parla richesse de ses éclats, Nourri des sources bibliques, mythologiques, populaires, audacieux comme Prométhée, habile et ingénieux comme Hermés, Rabelais a rassemmblé dans son oeuvre tous les Dieux du feu: Zeus, Jupiter, Apollon, Mars, Phébus, Vesta, Vulcain, Lucifer…; tousles les "fils" du feu: lumiére, flamme, braise,

关键词： LE FEU CHEZ RABELAIS

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PN-ImTLSM facilitates high-throughput low background single-molecule localization microscopy deep in the cell

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Biophysics Reports 2021年第4期7卷 313-325页

作者： Boxin Xue Caiwei Zhou Yizhi Qin Yongzheng Li Yuao sun Lei Chang Shipeng Shao Yongliang Li Mengling Zhang chaoying sun Renxi He Qian Peter Su Yujie sun State Key Laboratory of Membrane Biology Biomedical Pioneer Innovation Center (BIOPIC)School of Life SciencesPeking University College of Chemistry and Molecular Engineering Peking University Academy for Advanced Interdisciplinary Studies Peking University Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory) Beijing Institute of Heart Lung and Blood Vessel Disease Beijing Anzhen HospitalCapital Medical University Department of Geriatric Dentistry Peking University School and Hospital of Stomatology School of Biomedical Engineering Faculty of Engineering and Information TechnologyUniversity of Technology Sydney School of Future Technology Peking University

When imaging the nucleus structure of a cell, the out-of-focus fluorescence acts as background and hinders the detection of weak signals. Light-sheet fluorescence microscopy(LSFM) is a wide-field imaging approach which has the best of both background removal and imaging speed. However, the commonly adopted orthogonal excitation/detection scheme is hard to be applied to single-cell imaging due to steric hindrance. For LSFMs capable of high spatiotemporal single-cell imaging, the complex instrument design and operation largely limit their throughput of data collection. Here, we propose an approach for high-throughput background-free fluorescence imaging of single cells facilitated by the Immersion Tilted Light Sheet Microscopy(ImTLSM). ImTLSM is based on a light-sheet projected off the optical axis of a water immersion objective. With the illumination objective and the detection objective placed opposingly, ImTLSM can rapidly patrol and optically section multiple individual cells while maintaining single-molecule detection sensitivity and resolution. Further, the simplicity and robustness of ImTLSM in operation and maintenance enables high-throughput image collection to establish background removal datasets for deep learning. Using a deep learning model to train the mapping from epi-illumination images to ImTLSM illumination images, namely PN-ImTLSM, we demonstrated crossmodality fluorescence imaging, transforming the epi-illumination image to approach the background removal performance obtained with ImTLSM. We demonstrated that PN-ImTLSM can be generalized to large-field homogeneous illumination imaging, thereby further improving the imaging throughput. In addition, compared to commonly used background removal methods, PN-ImTLSM showed much better performance for areas where the background intensity changes sharply in space, facilitating high-density single-molecule localization microscopy. In summary, PN-ImTLSM paves the way for background-free fluorescence imaging

关键词： Light-sheet fluorescence microscopy Background-free fluorescence imaging Deep learning Single cell imaging Homogeneous illumination Single-molecule localization microscopy

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试论关检融合法律制度及其执法衔接

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海关法评论 2020年第1期9卷 45-63页

作者：孙超英武汉海关学会中国海关学会

出入境检验检疫管理职责和队伍划入海关后,其原执行的法律、法规规定职责和工作改由海关承担,原有法律适用应相应调整,有关法律制度需要统合完善设置,对涉刑案件应调整受案的公安机关,对涉检行政违法案件应确定处理部门,因此,建议进一... 详细信息

出入境检验检疫管理职责和队伍划入海关后,其原执行的法律、法规规定职责和工作改由海关承担,原有法律适用应相应调整,有关法律制度需要统合完善设置,对涉刑案件应调整受案的公安机关,对涉检行政违法案件应确定处理部门,因此,建议进一步明确相关法律制度和执法的衔接、设置策略。

关键词：关检法律制度机构合并

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关税纳税人范畴及其制度完善研究

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海关与经贸研究 2016年第5期37卷 88-96页

作者：孙超英武汉海关学会

海关税收纳税人承担了全部海关税收缴纳的义务,其理论、制度构建及完善属于海关税收征管体系基础和核心问题之一。适应海关税收征管执法实际,科学认识确定其范围,构建完善法律制度体系,有助于促进海关更好履行税收征管职责,科学治税,推... 详细信息

海关税收纳税人承担了全部海关税收缴纳的义务,其理论、制度构建及完善属于海关税收征管体系基础和核心问题之一。适应海关税收征管执法实际,科学认识确定其范围,构建完善法律制度体系,有助于促进海关更好履行税收征管职责,科学治税,推进建立和谐经济社会。

关键词：海关税收纳税人范畴制度构建

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海关法税收保全措施执法探讨

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海关法评论 2015年第1期 173-184页

作者：孙超英中国海关学会武汉海关学会

从海关征补税,尤其是税收保全在办理涉税事项及案件中运用的角度,探析《海关法》第61条海关税收保全措施构成情形、可适用范围、在办理涉税事项、违规等税案中的运用等问题,提出完善《海关法》等相关法律制度、与《行政强制法》衔接执... 详细信息

从海关征补税,尤其是税收保全在办理涉税事项及案件中运用的角度,探析《海关法》第61条海关税收保全措施构成情形、可适用范围、在办理涉税事项、违规等税案中的运用等问题,提出完善《海关法》等相关法律制度、与《行政强制法》衔接执法等策略和建议,从而保证有关款项、财物及时、顺利执行缴税。

关键词：海关法税收保全

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关于完善“无合法证明进口货物”法律制度的若干思考

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海关法评论 2018年第1期 123-136页

作者：孙超英中国海关学会武汉海关学会

我国有漫长海岸线、陆地边界和众多口岸,有广阔内地腹地。长期以来大量应征关税进口货物通过非设关地、或设关地走私进境,从沿边沿海、口岸流向内地,货物呈无合法证明状态,因法律制度设置不完善,海关等执法机关无法处理,带来巨额关税损... 详细信息

我国有漫长海岸线、陆地边界和众多口岸,有广阔内地腹地。长期以来大量应征关税进口货物通过非设关地、或设关地走私进境,从沿边沿海、口岸流向内地,货物呈无合法证明状态,因法律制度设置不完善,海关等执法机关无法处理,带来巨额关税损失。为此,需完善法律,对涉案标的应一律追征关税和进口环节税,增加追究沿海沿边规定地区相关行为刑责,对内地相关行为行政处理,增加在有关区域海关执法权,对公私财物合理保护。

关键词：无合法证明进口货物法律制度

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