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Regeneration of 2-amino-2-methyl-1-propanol used for carbon dioxide absorption

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Journal of Environmental Sciences 2008年第1期20卷 39-44页

作者： ZHANG Pei SHI Yao wei jianwen ZHAO wei YE Qing Department of Environmental Science Zhejiang University Hangzhou 310028 China

To improve the efficiency of the carbon dioxide cycling process and to reduce the regeneration energy consumption, a sterically hindered amine of 2-amino-2-methyl-1- propranol （AMP） was investigated to determine its regeneration behavior as a CO2 absorbent. The CO2 absorption and amine regeneration characteristics were experimentally examined under various operating conditions. The regeneration efficiency increased from 86.2% to 98.3% during the temperature range of 358 to 403 K. The most suitable regeneration temperature for AMP was 383 K, in this experiment condition, and the regeneration efficiency of absorption/regeneration runs descended from 98.3% to 94.0%. A number of heat-stable salts （HSS） could cause a reduction in CO2 absorption capacity and regeneration efficiency. The results indicated that aqueous AMP was easier to regenerate with less loss of absorption capacity than other amines, such as, monoethanolamine （MEA）, diethanolamine （DEA）, diethylenetriamine （DETA）, and N-methyldiethanolamine （MDEA）.

关键词： carbon dioxide 2-amino-2-methyl-1-propanol regeneration efficiency energy consumption

Capture of carbon dioxide by amine-impregnated as-synthesized MCM-41

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Journal of Environmental Sciences 2010年第10期22卷 1558-1563页

作者： jianwen wei Lei Liao Yu Xiao Pei Zhang Yao Shi . College of Environmental Science and Technology Guangxi Key Laboratory of Environmental Engineering and Protecting Assessment Guilin University of Technology Guilin 541004 China. Department of Chemical and Biochemical Engineering Zhejiang University Hangzhou 310027 China

The novel carbon dioxide （CO2） adsorbents with a high capture efficiency were prepared through impregnating the as-synthesized MCM-41 with three kinds of amines, namely diethylenetriamine （DETA）, triethylenetetramine （TETA） and 2-amino-2-methyl-1- propanol （AMP）. The resultant samples were characterized by small angle X-ray diff action and low temperature N2 adsorption. The synthesis way not only saves the energy or extractor to remove the template but also is environmentally friendly due to the absence of the potential pollutants such as toluene. CO2 capture was investigated in a dynamic packed column. The sample impregnated by TETA showed the highest adsorption capacity, approximately 2.22 mmol/g at 60℃ due to its highest amino-groups content among the three amines. The CO2 adsorption behavior was also investigated with the deactivation model, which showed an excellent prediction for the breakthrough curves.

关键词： CO2 capture as-synthesized MCM-41 impregnation deactivation model

氨基改性介孔分子筛吸附CO_(2)的研究进展

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当代化工研究 2024年第5期 13-15页

作者：张琳瑄魏建文朱红祥桂林理工大学环境科学与工程学院广西541006 广西生态环保现代产业学院广西541006

人为CO_(2)排放量持续增加导致温室效应愈演愈烈的情况仍为当今面临的最为急迫的问题之一。氨基改性介孔分子筛因具有CO_(2)吸附量高、吸附速率快等优点,成为近年来研究热点。本文综述了用胺对一系列常见的介孔分子筛进行改性的研究进展... 详细信息

人为CO_(2)排放量持续增加导致温室效应愈演愈烈的情况仍为当今面临的最为急迫的问题之一。氨基改性介孔分子筛因具有CO_(2)吸附量高、吸附速率快等优点,成为近年来研究热点。本文综述了用胺对一系列常见的介孔分子筛进行改性的研究进展,以及它们的CO_(2)吸附性能。还分别讨论了物理浸渍、化学嫁接和双功能化对分子筛改性的优缺点。综合分析后对氨基改性介孔分子筛研究方向提出展望。

关键词：氨基改性介孔分子筛 CO_(2)吸附

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轴承滚子冲压裂纹形成机理及控制工艺研究

热处理技术与装备 2024年第4期45卷 26-30页

作者：董小波史亚妮魏建文王超尤蕾蕾崔广发洛阳轴承集团股份有限公司河南洛阳471039 航空精密轴承国家重点实验室河南洛阳471039 河南省高端轴承产业研究院河南洛阳471039 河南省轴承技术创新中心河南洛阳471039

某批轴承冲压滚子端面出现裂纹,通过分析其冲压过程,观察其裂纹处及断口的形貌和显微组织,对裂纹产生的主要原因进行分析。结果表明,原材料局部存在的碳化物液析和碳化物带状超标导致该部位塑韧性变差;并且冷镦过程中大端面的变形较大,... 详细信息

某批轴承冲压滚子端面出现裂纹,通过分析其冲压过程,观察其裂纹处及断口的形貌和显微组织,对裂纹产生的主要原因进行分析。结果表明,原材料局部存在的碳化物液析和碳化物带状超标导致该部位塑韧性变差;并且冷镦过程中大端面的变形较大,加工硬化作用强,在二者叠加作用下产生裂纹。提出了解决裂纹的措施,需要严格控制原材料质量,保证材料组织和成分的均匀性,避免类似问题再次发生。

关键词：冲压滚子大端面裂纹碳化物带状碳化物液析

Features of PBB-TE Architecture and GMPLS Control Technology

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ZTE Communications 2010年第3期8卷 13-16页

作者： wei jianwen Xie Rui Jin Yaohui The state key lab of advanced optical communication systems ＆ networks Shanghai Jiao Tong University Shanghai 200030 P. R. China Network ＆ Information Center of Shanghai Jiao Tong University Shanghai 200240 P. R. China

Time Division Multiplexing （TDM） transport networks are evolving to packet-oriented, and a variety of carrier-class packet transport technologies have emerged. Provider Backbone Bridge with Traffic Engineering （PBB-TE） is a connection-oriented packet transport technology that provides good scalability and manageability, and guarantees Quality of Service （eoS）. Generalized Multi-Protocol Label Switching （GMPLS）is a mature transport network control plane technology that supports multiple data planes with different switching granularity. GMPLS-controlled PBB-TE is a promising solution for Packet Transport Networks （PTN）.

关键词： Control Technology GMPLS technology Traffic Engineering Quality of Service transport network Label Switching control plane Generalized different solution Provider multiple variety Time data TDM QoS PTN

Supramolecular Vesicles Based on Gold Nanorods for Precise Control of Gene Therapy and Deferred Photothermal Therapy

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CCS Chemistry 2022年第5期4卷 1745-1757页

作者： Ludan Yue Kuikun Yang jianwen wei Mengze Xu Chen Sun Yuanfu Ding Zhen Yuan Shu Wang Ruibing Wang State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoTaipaMacao SAR 999078 Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190 Cancer Center Faculty of Health Sciences and Center for Cognitive and Brain SciencesUniversity of MacaoTaipaMacao SAR 999078

In spite of being a promising therapeutic modality,gene therapy has limited clinical applications,mostly due to the lack of spatiotemporal resolution and inadequate ***,we present a facile strategy to remotely control intracellular gene expression by using gold nanorod-(Au NR)derived,host-guest interaction-mediated supramolecular vesicles as a gene carrier and photothermal *** pulsed laser irradiation,mild photothermal conditions dissociate supramolecular vesicles to release gene and simultaneously activate heat shock protein-70 promoter(Hsp70)for spatiotemporally initiating gene expression inside cancer ***,upon introducing a polymeric guest species specifically into cancer cells,the dissociated Au NRs functionalized with macrocyclic host molecules could re-aggregate rapidly in cells to retard exocytosis of these NRs,thereby allowing deferred photothermal therapy to enhance the overall therapeutic outcome.

关键词： supramolecular vesicles host-guest chemistry self-assembly photothermal therapy inducible gene therapy

Small molecule conjugates with selective estrogen receptor β agonism promote anti-aging benefits in metabolism and skin recovery

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Acta Pharmaceutica Sinica B 2024年第5期14卷 2137-2152页

作者： Tarik Zahr Vijay K.Boda Jian Ge Lexiang Yu Zhongzhi Wu jianwen Que wei Li Li Qiang Naomi Berrie Diabetes Center Columbia UniversityNew YorkNY 10032USA Department of Molecular Pharmacology and Therapeutics Columbia UniversityNew YorkNY 10032USA Department of Pharmaceutical Sciences College of PharmacyUniversity of Tennessee Health Science CenterMemphisTN 38163USA Drug Discovery Center College of PharmacyUniversity of Tennessee Health Science CenterMemphisTN 38163USA Division of Digestive and Liver Diseases Columbia UniversityNew YorkNY 10032USA Center for Human Development Columbia UniversityNew YorkNY 10027USA Department of Pathology and Cell Biology Columbia UniversityNew YorkNY 10032USA Department of Medicine Columbia UniversityNew YorkNY 10032USA

Estrogen is imperative to mammalian reproductivity,metabolism,and ***,the hormone activating estrogen receptor(ERs)αcan cause major safety concerns due to the enrichment of ERαin female tissues and certain *** contrast,ERβis more broadly expressed in metabolic tissues and the ***,it is desirable to generate selective ERβagonist conjugates for maximizing the therapeutic effects of ERs while minimizing the risks of ERα***,we report the design and production of small molecule conjugates containing selective non-steroid ERβagonists Gtx878 or *** of aged mice with our synthesized conjugates improved aging-associated declines in insulin sensitivity,visceral adipose integrity,skeletal muscle function,and skin health,with validation in *** further uncovered the benefits of ERβconjugates in the skin using two inducible skin injury mouse models,showing increased skin basal cell proliferation,epidermal thickness,and wound ***,our ERβ-selective agonist conjugates offer novel therapeutic potential to improve aging-associated conditions and aid in rejuvenating skin health.

关键词： Estrogen receptorβ Aging Metabolism Skin injury Muscle metabolism Small molecule conjugates Regeneration Adiposity

Biomimetic Recognition-Based Bioorthogonal Host-Guest Pairs for Cell Targeting and Tissue Imaging in Living Animals

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CCS Chemistry 2022年第6期4卷 1977-1989页

作者： Yan-Long Ma Chen Sun Zeshun Li Ziyi Wang jianwen wei Qian Cheng Li-Shuo Zheng Xiao-Yong Chang Kai Li Ruibing Wang wei Jiang Shenzhen Grubbs Institute Guangdong Provincial Key Laboratory of Catalysisand Department of ChemistrySouthern University of Science and TechnologyShenzhen 518055 State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical ScienceMoE Frontiers Science Center for Precision OncologyUniversity of MacaoTaipaMacao 999078 Department of Biomedical Engineering Southern University of Science and TechnologyShenzhen 518055

Bioconjugation methods offer very important tools in studying biological *** host-guest pairs provide an alternative and complementary conjugation method to bioorthogonal reactions and biological association ***,macrocyclic hosts that can be used for in situ capture are limited and often rely on extremely high binding ***,we report an alternative bioorthogonal host-guest pair that relies on highly selective molecular recognition in *** host,namely amide naphthotube,possesses a biomimetic cavity with inward-directing hydrogen bonding sites and shows selective and strong binding to the guest(2-phenyl pyrimidine)even in biological *** anchoring the tetraphenyl ethylene-modi fied hosts to cell surfaces,the bioorthogonal host-guest pair can be applied in cell surface recognition,cell-cell interactions,and tissue imaging in *** bioorthogonality is originated from the high binding selectivity of the biomimetic macrocyclic host,which is different from other known host-guest pairs that have been applied in biological *** research provides a new noncovalent bioconjugation tool and a new concept for designing bioorthogonal host-guest pairs for biological applications.

关键词： cell targeting tissue imaging bioconjugation bioorthogonal host-guest pair naphthotube

企业社会资本的概念与测量：一个综合理论分析框架

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社会 2008年第6期28卷 60-70页

作者：尉建文中央财经大学

本文采用"网络闭合"和"结构洞"两种社会资本的理论视角,提出"信任"和"网络位置"是企业社会资本的最主要特征的观点,并从组织和群体两个层面及企业内部和外部两个部分对企业的社会资本测量进行了分析。在本文所提出的企业社会资本测量的... 详细信息

本文采用"网络闭合"和"结构洞"两种社会资本的理论视角,提出"信任"和"网络位置"是企业社会资本的最主要特征的观点,并从组织和群体两个层面及企业内部和外部两个部分对企业的社会资本测量进行了分析。在本文所提出的企业社会资本测量的分析框架中,在组织层面上,将企业看作是网络中的节点,关注企业的正式关系以及网络结构特征;在群体层面上,将企业社会资本看作是企业"班底"的内部信任程度以及在他们在人际关系网络中的位置。

关键词：企业社会资本网络闭合结构洞概念与测量