更新于：2024-11-04
大连校企资产经营管理有限公司
更新于：2024-11-04
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Therapeutic Benefits of Music for Parkinson's Disease: a fNIRS Study Protocol for Controlled Trial
100 项与 大连校企资产经营管理有限公司 相关的临床结果
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2024-11-01SEPARATION AND PURIFICATION TECHNOLOGY
Hydrophilic modified PES asymmetric membrane via thermal cross-linking for artificial lung application
作者: Liao, Zelin ; He, Gaohong ; Gong, Hao ; Zhang, Xinlu ; Zhang, Xiujuan ; Ruan, Xuehua ; Zheng, Wenji ; Dai, Yan ; Wang, Xiaokun
Excellent hemocompatibility and long-term stability against blood wetting are important properties required for artificial lung membrane, the core component in extracorporeal membrane oxygenator which is life-saving for patients with severe lung dysfunctions.Herein, novel hydrophilic modified polyethersulfone (PES) asym. membranes were synthesized via thermal crosslinking, and characterization via SEM, FTIR, 1H NMR and surface water contact angle measurements demonstrated that the modified asym. membranes composing a dense layer with hydrophilic surface on top of a microporous support layer were successfully fabricated without any observed defects.Among all the modified membranes, PEGylated PES membrane exhibited the smoothest membrane surface, improved mech. property, good gas permeability and the best performance in hemocompatibility in terms of blood coagulation, protein adsorption and platelet adhesion.Moreover, the PEGylated PES membrane showed excellent long-term stability in membrane surface wettability as well as long-term stable performance against blood fouling and wetting.This research work provides valuable insights and new idea into synthesizing membranes, with simple synthesis process, long lasting high hemocompatibility and stability against wetting, for application as artificial lung membranes.
2024-11-01SEPARATION AND PURIFICATION TECHNOLOGY
The co-promoting mechanism of EMEA/DEEA/PZ ternary water-lean solvent on CO2 capture- a study based on 13C-qNMR and DFT calculations
作者: Liu, Jiaxu ; Zhao, Yiming ; Cao, Yang ; Liu, Qi ; Chen, Shaoyun ; Wang, Qiang ; Zhang, Yongchun ; Guo, Xinwen
Amine based CO2 absorption is currently the most promising means of capturing CO2 in industry, and the water-lean amine solvent has received widespread attentions.The reaction mechanism of the EMEA/DEEA/PZ ternary water-lean amine solvent (WLS) during the process of CO2 capture was investigated theor. to understand the synergistic effect between the different amine components.The concentrations of intermediate products were analyzed by 13C-qNMR (quant. NMR) spectroscopy, while the reaction mechanisms were calculated using gaussian 16.The NMR results showed that carbamate (EMEACOO-), HCO-3/CO2-3 were the main products in the carbon capture process of EMEA WLS.The protonated amine concentration varies according to the change of carbon dioxide concentrationThe balance between deprotonation (forming carbamates) and CO2 removal (regenerating EMEA) depends largely on how ampholytes interact with nearby water mols.The DFT result showed that EMEA is the key component of CO2 capture, while DEEA and PZ primarily assist in transferring protons, catalyzing the conversion of H2CO3 into HCO-3 to accelerate the process of CO2 capture.Furthermore, they assist in the redaction of EMEAH+ to EMEA, allowing it continue to participate in capture reactions.DEEA, PZ and water could promote activating the protonated EMEA and enhanced its capacity of CO2 capture.Furthermore, the desorption process confirmed the proton transfer from DEEAH+, ultimately leading to the regeneration of EMEA, thereby demonstrating the effective performance of regeneration.
2024-10-01METALS AND MATERIALS INTERNATIONAL
Microstructure Evolution and Mechanical Properties at Ambient and Elevated Temperatures of in-situ TiB2/2219Al Matrix Composites During Cold Rolling
作者: Wang, Tongmin ; Kang, Huijun ; Li, Jiehua ; Wei, Chengbin ; Zhang, Yubo ; Zhou, Donghu ; Guo, Enyu ; Han, Zhenhao ; Chen, Zongning ; Li, Linwei
Cold rolling is one of the feasible and effective methods for regulating the microstructure and enhancing the mech. properties of metallic materials.However, the cold rolling of particulate-reinforced aluminum matrix composites has been rarely studied comprehensively and systematically due to their limited plasticity.In this study, in-situ TiB2/2219Al matrix composites with a comparable ductility to 2219Al matrix were prepared and subjected to T3 treatment, which includes solution treatment, cold rolling, and natural ageing, with varying degrees of rolling reductionThe effects of cold rolling on the dislocation multiplication, grain and texture evolution, precipitation behavior, and mech. properties were comprehensively investigated and discussed.The results reveal that both total dislocation d. and geometrically necessary dislocation d. increase with increasing rolling reductionThe average grain size progressively decreases under the joint influence of gradual growth of large grains and increase of small grains.Besides, rolling deformation changes the ageing behavior of composites, resulting in a decrease in precipitation temperature for both θ" and θ′ phases.Under a large deformation, these phases precipitate at room temperatureMoreover, the types and proportions of textures undergoes a distinct evolution during deformation, with S, Copper and Brass textures being predominantly observed in the composite subjected to a 60% rolling reductionAddnl., the increase in deformation results in an enhanced hardness and strength at both room temperature and 373 K.However, the strength initially increases but subsequently decreases at 573 K, and the composite with a 20% rolling reduction exhibits the highest strength at 573 K.
100 项与 大连校企资产经营管理有限公司 相关的药物交易
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100 项与 大连校企资产经营管理有限公司 相关的转化医学
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