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A Biosurfactant-containing TSd Strategy to Modify Bovine Pericardial Bioprosthetic Valves for Anticalcification

Chinese Journal of Polymer science 2023年第1期41卷 51-66页

作者： Cai-Yun Gao Gang Wang Lin Wang Qun-Song Wang Han-Cheng Wang Lin Yu Jian-Xiong Liu Jian-dong ding State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai200438China R&D Center Lifetech Scientific(Shenzhen)Co.Ltd.Shenzhen518057China R&D Center Lifevalve Medical Scientific Co.Ltd.Shenzhen518057China

Bioprosthetic heart valves(BHVs)are important for transcatheter valve *** commercial BHVs on the market are basically porcine or bovine pericardium(BP)crosslinked with glutaraldehyde(GA).Simply applying GA to BHVs can enhance mechanical stability,but cannot alleviate in vivo *** this work,we developed a two-step decellularization(TSd)strategy to modify this biomacromolecular network,in which BP was post-treated,as the second step of decellularization,with a mild biosurfactant n-dodecyl-β-d-maltoside in a mixture of isopropanol and phosphate-buffered saline after the first step of traditional decellularization and GA *** TSd-treated BP exhibited not only low cytotoxicity and excellent mechanical properties in vitro,but also low immune responses and significant anticalcification in *** 60 days of subcutaneous implantation in the back of Wistar rats,the calcium content was,as quantified with an inductively coupled plasma optical emission spectrometer,only 1.1µg/mg compared to 138.6µg/mg in the control group without the *** addition,collagen fibrils were observed with field emitting scanning electron microscopy(SEM),and the morphology and composition of the calcified sites resulting from in vivo biomineralization were studied with SEM with energy dispersive spectroscopy and also X-ray *** study proposes a facile yet effective anticalcification strategy for the modification of the bovine pericardial bioprosthetic heart valve,a natural biomacromolecular network.

关键词： Heart valve Anticalcification Collagen In vivo biomineralization Transcatheter aortic valve implantation(TAVI) Extracellular matrix Biomacromolecular network Biosurfactant Bovine pericardium

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A novel reprocessable chloroprene rubber based on dynamic disulfide metathesis

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International Journal of Smart and Nano Materials 2024年第1期15卷 42-61页

作者： Jianliang Jiang Junxue Zhai Yanqing Chen dongqi Zhao Yakai Feng School of Chemical Engineering and Technology Collaborative Innovation Center of Chemical Science and Chemical Engineering(Tianjin)Tianjin UniversityTianjinChina R&D Department of China(Yangzhou) Material Handling Tech-Engineering LtdYangzhouChina Key Laboratory of Rubber Plastics of Ministry of Education/Shandong Province (QUsT)School of Polymer Science&EngineeringQingdao University of Science&TechnologyQingdaoChina R&D Department of Tianjin Joaboa Technology Co.Ltd TianjinP.R.China Frontiers Science Center for Synthetic Biology Tianjin UniversityTianjinChina Key Laboratory of Systems Bioengineering(Ministry of Education) Tianjin UniversityTianjinChina

For sustainable application of chloroprene rubber(Cr),a new technology is developed by the vulcanization of Cr using 2,2'-dithiodipyridine(dPd)as a cross-linking agent with the repro-cessing performance owing to disulfde *** dPd was incorporated into Cr vulcanization,the Menschutkin reac-tion between allyl chloride group and pyridine group occurred with a maximum exothermic peak at 184°*** number of effective cross-linking bond at o.5 phr dPd vulcanizate was higher than that at high dPd *** vulcanizate showed high tensile strength(11.12 MPa)and elongation at break(1253±120%)owing to the exchangeable disulfide bond in the *** the catalysis of triphenylphosphine,the metathesis of disulfide compound was improved obviously,which endowed Cr/dPd vulcanizates with good recyclability *** cross-linkage maintains its stability at low temperature,thus ensuring the mechanical stability of Cr/dPd vulcanizate under the ambient *** and reprocessing of Cr/dPd vulcanizate can be conducted with common industrial rubber processing *** reprocessable chloroprene rubber could have potential appli-cation in Cr industry,also serve to significantly improve envir-onmental sustainability.

关键词： Chloroprene rubber reprocessable Menschutkin reaction disulfide

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Effect of sodium starch octenyl succinate-based Pickering emulsion on the physicochemical properties of hairtail myofibrillar protein gel subjected to multiple freeze-thaw cycles

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Food science and Human Wellness 2024年第2期13卷 1018-1028页

作者： Huinan Wang Jiaxin Zhang Xinran Liu Jinxiang Wang Xuepeng Li Jianrong Li Key Laboratory of Food Nutrition and Safety Ministry of EducationCollege of Food Science and EngineeringTianjin University of Science and TechnologyTianjin 300457China College of Food Science and Technology Bohai UniversityNational R&D Branch Center of Surimi and Surimi Products ProcessingJinzhou 121013China

A Pickering emulsion based on sodium starch octenyl succinate(SSOS)was prepared and its effects on the physicochemical properties of hairtail myofibrillar protein gels(MPGs)subjected to multiple freeze-thaw(F-T)cycles were *** whiteness,water-holding capacity,storage modulus(G')and texture properties of the MPGs were significantly improved by adding 1%-2%Pickering emulsion(P<0.05).Meanwhile,raman spectral analysis demonstrated that Pickering emulsion promoted the transformation of secondary structure,enhanced hydrogen bonds and hydrophobic interactions,and promoted the transition of disulfide bond conformation from g-g-g to g-g-t and *** an emulsion concentration of 2%,theα-helix content decreased by 10.37%,while theβ-sheet content increased by 7.94%,compared to the *** F-T cycles,the structure of the MPGs was destroyed,with an increase in hardness and a decrease in whiteness and water-holding capacity,however,the quality degradation of MPGs was reduced with 1%-2%Pickering *** findings demonstrated that SSOS-Pickering emulsions,as potential fat substitutes,can enhance the gel properties and the F-T stability of MPGs.

关键词： Pickering emulsion Myofibrillar protein Gel properties Freeze-thaw stability Intermolecular interactions

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Crack Initiation and Propagation Mechanism of rapidly Tempered High-Si Steel during Hydrogen Embrittlement

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Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan 2025年第2期111卷 21-31页

作者： Sunako, Manami Mizumoto, Masataka Tanaka, ren Kumai, Shintaro Yamauchi, Yuichiro Ooi, Azusa Tada, Eiji R&D Div. NHK Spring Co. Ltd. Japan Laboratory for Future Interdisciplinary Research of Science and Technology Institute of Integrated Research Institute of Science Tokyo Japan Dept. Materials Science and Engineering School of Materials and Chemical Technology Institute of Science Tokyo Japan

In this study, we focused on fine dispersion of Fe2-3C(Ε) by combining the addition of Si and rapid tempering to improve the hydrogen embrittlement resistance of high-strength spring steels. The aim of this study is to clarify the fracture mechanism of rapidly tempered high-Si steels: the JISSUP7 (2.0Si) and SAE9254 (1.4Si) spring steels were tempered at different tempering rates by induction (IH) and furnace heating (FH) methods. Bending test were carried out during the cathodic hydrogen charging to observe the fracture origin and morphology of the steels. The size and volume of carbides were quantified using small-angle X-ray scattering method (SAXS) and synchrotron radiation Xrd. The distribution of carbides was observed with the replica method: facets were observed at the fracture origin of the 2.0Si-IH steel and 1.4Si-IH steel, which contained retained γ in the microstructure. It was considered that the facets formed because retained γ at the grain boundaries transformed into martensite during hydrogen embrittlement, promoting intergranular cracking;the 2.0Si-IH steel contained the largest amount of retained γ, but also contained fine Fe2-3C(Ε) in the lath. This suggests that dislocations and hydrogen are less likely to accumulate at the grain boundaries, resulting in the longest fracture life. In other words, in rapidly tempered high Si steels (2.0Si-IH steels), the fine dispersion of Fe2-3C(Ε) has more influence on the suppression of crack initiation and propagation than the increase in the amount of retained γ, and this contributes significantly to the fracture life. © 2025 The Iron and Steel Institute of Japan.

关键词： Hydrogen embrittlement

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Analysis of the Battery Capacity and Imbalanced Charging Ability for a Cascade H Bridge in Shinkansen regeneration Energy Storage Application 27

Analysis of the Battery Capacity and Imbalanced Charging Abi...

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27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Jin, Zhaoyang Kondo, Keiichiro Nishi, Kentaro Saito, rika School of Advanced Science and Engineering Waseda University Tokyo Japan R&d Center Jr East Group Environmental Engineering Research Laboratory Saitama Japan

ISBN: (纸本)9784886864406

The Shinkansen, as a highly popular mode of transportation in Japan, consumes and regenerates substantial amounts of electricity energy. Because of the AC power supply of Shinkansen, the energy generated by regeneration braking of the Shinkansen is wasted and sent back to the commercial power grid if there is no other Shinkansen in same power feeding section. To effectively utilize this surplus energy, the ground-based energy storage systems is necessary. Cascade H bridge (CHB) system has advantages such as ease of modularization and low voltage stress on switching devices, making it widely used in high-voltage and high-power applications. The CHB is also used in ground-based energy storage systems of Shinkansen. However, CHB has issues like unbalanced voltage and power between different modules. In this study, the relationship between battery capacity of each module and the maximum unbalanced charging power that the CHB can withstand is studied to ensure that there is sufficient battery capacity during the design phase to guarantee the system has enough unbalanced charging capability. © 2024 The Institute of Electrical Engineers of Japan.

关键词： State of charge

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In-situ construction of epitaxial phase for boosting zinc nucleation on three-dimensional interface

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Progress in Natural science:Materials International 2024年第3期34卷 578-584页

作者： Xin He Zhe Zhu Xiaoqiao Liao Kai Yang Yixue duan Linfeng Lv Chuan Zhao Wei Zhao Jibing Chen Peng Tian Xiaoyu Liu Liang He School of Mechanical Engineering State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering Sichuan University School of Chemistry Faculty of Science University of New South Wales School of Materials Science and Engineering Sichuan University of Science & Engineering School of Mechanical Engineering Wuhan Polytechnic University Med+X Center for Manufacturing West China Hospital Sichuan University Yibin Industrial Technology Research Institute of Sichuan University Yibin R&D Park of Sichuan University

Interface modification of zinc（Zn） metal anode with conductive three-dimensional（3d） structure is widely utilized in zinc ion batteries. However, the uniformity of zinc nucleation on surface microstructure is rarely investigated which exacerbates the tip effect and raises unstable risk. Herein, a strategy via the initial copper（Cu）alloying and following sulfurization treatment is reported to accomplish boosted uniform nucleation of zinc on the modified layer with dense microstructures. This epitaxial sulfide phase not only improves the wetting area to revitalize the microstructural surface, but also forms a bifunctional zincophilic Cu2S/CuZn alloy interface layer,which combines the merits of guided local ions diffusion and improved zinc nucleation environment. As a result, a homogeneous growth of zinc on the 3d structural substrate can be realized, and cycling stability of the achieved Cu2S/CuZn electrode with a practical capacity of 1 mAh cm-2under 1 mA cm-2or amplified current density of 10 mA cm-2is significantly enhanced. This work provides an epitaxial strategy in constructing a bifunctional zincophilic interface layer for boosting zinc nucleation, and offers a new perspective on the modification of 3d surface structure for stabilization of zinc anode.

关键词： Zn anode Hydrophilicity Sulfide CuZn alloy Zn metal battery

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Effects of zinc on χ-Fe_(5)C_(2) for carbon dioxide hydrogenation to olefins:Insights from experimental and density function theory calculations

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Chinese Journal of Chemical engineering 2023年第2期54卷 206-214页

作者： Xianglin Liu Minjie Xu Chenxi Cao Zixu Yang Jing Xu State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Maoming Branch R&D Institute SINOPECMaoming 525000China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of EducationEast China University of Science and TechnologyShanghai 200237China

Production of light olefins from CO_(2), the primary greenhouse gases, is of great importance to mitigate the adverse effects of CO_(2) emission on environment and to supply the value-added products from nonpetroleum resource. However, development of robust catalyst with controllable selectivity and stability remains a challenge. Herein, we report that Zn-promoted Fe catalyst can boost the stable and selective production of light olefins from CO_(2). Specifically, the Zn-promoted Fe exhibits a highly stable activity and olefin selectivity over 200 h time-on-stream compared to the unpromoted Fe catalyst, primarily owing to the preservation of active χ-Fe_(5)C_(2) phase. Structural characterizations of the spent catalysts suggest that Zn substantially regulates the content of iron carbide on the surface and suppresses the reoxidation of bulk iron carbide during the reaction. dFT calculations confirm that adsorption of surface carbon atoms and graphene-like carbonaceous species are not thermochemically favored on Zn-promoted Fe catalyst. Carbon deposition by CAC coupling reactions of two surface carbon atoms and dehydrogenation of CH intermediate are also inhibited. Furthermore, the effects of Zn on antioxidation of iron carbide were also investigated. Zn favored the hydrogenation of surface adsorbed oxygen atoms to H_(2)O and the desorption of H_(2)O, which reduces the possibility of surface carbide being oxidized by the chemisorbed oxygen.

关键词： reaction engineering χ-Fe_(5)C_(2) Zn promoter Carbon dioxide Hydrogenation density function theory

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Jade Powder: Characterization, Cytocompatibility, and Bactericidal Effect

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Journal of Testing and Evaluation 2023年第5期51卷

作者： Chen, Lunqian Han, Chong du, Bangyao He, Gaohong Zhang, Xiujuan State Key Laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology Panjin Campus 2 Dagong Rd. Liaodongwan Panjin124221 China R&D Center of Membrane Science and Technology School of Chemical Engineering Dalian University of Technology 2 Linggong Rd. Ganjingzi Dalian116024 China

To date, there has been little attention focused on jade powder, the leftover of the jade polishing process, although jade has been long considered precious and valuable. Herein, jade powder was characterized, followed by an investigation on its biocompatibility and bactericidal effects. Characterization conducted by scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Fourier-transform infrared spectroscopy showed that the main component of jade powder is tremolite, which is in good crystallization with no typical peaks of possible impurities observed. Tremolite's main elements are oxygen, calcium, magnesium, and silicon, all of which exist in the form of oxides. Water contact angle, trace element content, and in vitro cytotoxicity analyses demonstrated that jade powder is of hydrophilicity and good cytocompatibility and contains only parts-per-million-level heavy metals. Meanwhile, antibacterial evaluation proved that the jade powder had excellent antimicrobial effects against both gram positive and negative microbes such as Escherichia coli and Staphylococcus aureus. This study suggested that jade powder is a promising material that could be used in the fields of biological and medical applications. © 2023 by ASTM International, 100 Barr Harbor drive, PO Box C700, West Conshohocken, PA 19428-2959 ASTM International is not responsible, as a body, for the statements and opinions expressed in this paper. ASTM International does not endorse any products represented in this paper.

关键词： Biocompatibility

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Low False-Alarm Active Sonar detection under Strong reverberation

Low False-Alarm Active Sonar Detection under Strong Reverber...

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2024 OES China Ocean Acoustics, COA 2024

作者： Sibo, Li rui, Guo dianlun, Zhang Yujuan, Li Xiaoqian, Hou Shengfeng, Wang Science and Technology on Underwater Acoustic Laboratory/ Technology R&d Center Harbin Engineering University Haiying Enterprise Group Co. Ltd Wuxi Harbin China Technology R&d Center Haiying Enterprise Group Co. Ltd Wuxi China Science and Technology on Underwater Acoustic Laboratory Harbin Engineering University Harbin China

ISBN: (纸本)9798350340297

In active low-frequency and high-power sonar systems, target detection must overcome strong reverberation. Active sonar reverberation interference strongly fluctuates with distance and exhibits significant temporal and spatial variations. Active sonar reverberation is a typical nonstationary background. Complex changes in reverberation directly affect the target detection performance of active sonar systems. The major difficulty associated with current detection algorithms lies in autonomous detection, particularly in terms of the adaptability of detection algorithms to complex background interference. Accurately performing dynamic background estimation, suppressing interference, controlling false alarms, and highlighting weak targets are the focus of object detection. This paper proposes an active sonar target detection method driven by a combination of data and models. The proposed method can achieve target detection under strong reverberation interference with low sidelobe false alarms and high robustness. © 2024 IEEE.

关键词： reverberation

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Chiral inorganic nanomaterials:Harnessing chirality-dependent interactions with living entities for biomedical applications

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Nano research 2023年第8期16卷 11107-11124页

作者： Qi Gao Lili Tan Zhihao Wen daidi Fan Junfeng Hui Peng-peng Wang Shaanxi Key Laboratory of Degradable Biomedical Materials Shaanxi R&D Center of Biomaterials and Fermentation EngineeringSchool of Chemical EngineeringNorthwest UniversityXi’an 710069China State Key Laboratory for Mechanical Behavior of Materials Shaanxi International Research Center for Soft MatterSchool of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China

Chirality is an intriguing and fundamental property of natural matter,which is especially crucial in supporting the processes of living *** selective interactions between natural chiral compounds are widespread at all levels in living entities and play a vital role in biochemical *** cutting-edge advancements in synthetic chiral inorganic nanostructures have led to significant progress in their applications within biological *** developments have unraveled chirality-dependent interactions at the nanoscale and molecular scale,providing a better understanding of intricate process of chiral selection in biological systems and demonstrating the potential of chiral inorganic nanostructures for life science ***,we summarize recent progress in understanding the chirality origin of inorganic chiral nanoparticles and the development of wet-chemical *** also discuss the captivating interaction between chiral inorganic nanostructures and biological entities at various ***,we discuss the challenges and potential of functional chiral nanomaterials for future biomedical and bioengineering applications,offering design ideas and a forecast for their future impact.

关键词： chiral inorganic nanomaterials living system chirality-dependent interaction bioengineering application

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