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1,097 results on '"He, Chunnian"'

201. A High Throughput Cell-Based Screen Assay for LINE-1 ORF1p Expression Inhibitors Using the In-Cell Western Technique

Author

Kou, Yanni, primary, Wang, Shujie, additional, Ma, Yanjie, additional, Zhang, Ning, additional, Zhang, Zixiong, additional, Liu, Qian, additional, Mao, Yang, additional, Zhou, Rui, additional, Yi, Dongrong, additional, Ma, Ling, additional, Zhang, Yongxin, additional, Li, Quanjie, additional, Wang, Jing, additional, Wang, Jinhui, additional, Zhou, Xile, additional, He, Chunnian, additional, Ding, Jiwei, additional, Cen, Shan, additional, and Li, Xiaoyu, additional

Published
2022
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205. Phenolic compounds, antioxidant activity and sensory evaluation of sea buckthorn (Hippophae rhamnoides L.) leaf tea.

Author

He, Qian, Yang, Kailin, Wu, Xinyan, Zhang, Chunhong, He, Chunnian, and Xiao, Peigen

Subjects
SEA buckthorn, HIPPOPHAE rhamnoides, PLANT phenols, PHENOLS, SENSORY evaluation, TEA
Abstract

Sea buckthorn leaf tea, an emerging potential functional beverage product, has not yet had appropriate product standards and corresponding quality evaluation methods, and its poor taste directly affects the acceptance of the population, thus limiting its market consumption potential. In this study, two major packaging forms of sea buckthorn leaf tea available in the Chinese market were selected. The contents of total phenolics, total flavonoids, and 10 phenolic compounds, as well as the in vitro antioxidant capacity and sensory characteristics of sea buckthorn leaf tea were analyzed. Results showed that the quality of sea buckthorn leaf tea in the Chinese market varied widely. The total phenolic content, total flavonoid content, antioxidant activity, and consumer acceptance of bagged sea buckthorn leaf tea were higher than those of bulk sea buckthorn leaf tea. Multifactorial statistical analysis showed that the taste astringency of sea buckthorn leaf tea was closely related to ellagic acid and isorhamnetin‐3‐O‐neohesperidin. Furthermore, isorhamnetin‐3‐O‐neohesperidin had a greater effect on the antioxidant activity of sea buckthorn leaf tea. Therefore, ellagic acid and isorhamnetin‐3‐O‐neohesperidin can be used as potential quality markers for sea buckthorn leaf tea. This work provides a reference for taste improvement and quality control of sea buckthorn leaf tea. [ABSTRACT FROM AUTHOR]

Published
2023
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224. Engineering Pocket‐Like Graphene–Shell Encapsulated FeS 2 : Inhibiting Polysulfides Shuttle Effect in Potassium‐Ion Batteries

Author

Chen, Bochao, primary, Ding, Jiawei, additional, Bai, Xiangren, additional, Zhang, Hanwen, additional, Liang, Ming, additional, Zhu, Shan, additional, Shi, Chunsheng, additional, Ma, Liying, additional, Liu, Enzuo, additional, Zhao, Naiqin, additional, He, Fang, additional, Zhou, Wei, additional, and He, Chunnian, additional

Published
2021
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248. Manipulating mechanical properties of graphene/Al composites by an in-situ synthesized hybrid reinforcement strategy.

Author

Yang, Lizhuang, Pu, Bowen, Zhang, Xiang, Sha, Junwei, He, Chunnian, and Zhao, Naiqin

Subjects
GRAPHENE, ALUMINUM composites, STRAIN hardening, INTERFACE structures, CARBON nanotubes, TENSILE strength, NANOSTRUCTURED materials
Abstract

The structural deterioration caused by the relatively weak out-of-plane bending stiffness and the chemically-active edge area of graphene limits its outperformance in strengthening for Al matrix composites (AMCs). Introducing one-dimensional (1D) carbon nanotubes (CNTs) to graphene/metal system is one of the promised strategies to complement the weakness of 2D graphene and make full use of the outstanding intrinsic properties of the both reinforcements. To date, such synergistic strengthening and toughening mechanisms are largely unknown. In this study, AMCs reinforced by a novel hybrid reinforcement, i.e., graphene nanosheets decorated with Cu nanoparticles and CNTs (Cu@GNS-CNTs), are fabricated by an in-situ synthesis method. The combined contrast experiments validated that the organically integrated reinforcing structure promotes the intrinsic load bearing capacity of GNS and the strain hardening capability of the Al matrix simultaneously. As a result, the composites achieved excellent tensile strength and uniform elongation with almost no loss. The strengthening mechanism originated primarily from the hybrid reinforcement exhibits superior load-transfer, fracture inhibition and dislocation storage capability by controlling the interface reaction to construct an effective interface structure without damaging the reinforcement. Our work identifies a promising structural modification strategy for 2D materials and provides mechanistic insights into the synergistic strengthening effect of graphene/CNTs hybrid reinforcement. [Display omitted] [ABSTRACT FROM AUTHOR]

Published
2022
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249. Si-Assisted Solidification Path and Microstructure Control of 7075 Aluminum Alloy with Improved Mechanical Properties by Selective Laser Melting

Author

Sha, Junwei, Li, Meixian, Yang, Lizhuang, Rong, Xudong, Pu, Bowen, Zhao, Dongdong, Sui, Simi, Zhang, Xiang, He, Chunnian, Lan, Jianglin, and Zhao, Naiqin

Abstract

The construction and application of traditional high-strength 7075 aluminum alloy (Al7075) through selective laser melting (SLM) are currently restricted by the serious hot cracking phenomenon. To address this critical issue, in this study, Si is employed to assist the SLM printing of high-strength Al7075. The laser energy density during SLM is optimized, and the effects of Si element on solidification path, relative density, microstructure and mechanical properties of Al7075 alloy are studied systematically. With the modified solidification path, laser energy density, and the dense microstructure with refined grain size and semi-continuous precipitates network at grain boundaries, which consists of fine Si, β-Mg2Si, Q-phase and θ-Al2Cu, the hot cracking phenomenon and mechanical properties are effectively improved. As a result, the tensile strength of the SLM-processed Si-modified Al7075 can reach 486 ± 3 MPa, with a high relative density of ~ 99.4%, a yield strength of 291 ± 8 MPa, fracture elongation of (6.4 ± 0.4)% and hardness of 162 ± 2 (HV0.2) at the laser energy density of 112.5 J/mm3. The main strengthening mechanism with Si modification is demonstrated to be the synergetic enhancement of grain refinement, solution strengthening, load transfer, and dislocation strengthening. This work will inspire more new design of high-strength alloys through SLM.

Published
2022
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250. Engineering Pocket‐Like Graphene–Shell Encapsulated FeS2: Inhibiting Polysulfides Shuttle Effect in Potassium‐Ion Batteries.

Author

Chen, Bochao, Ding, Jiawei, Bai, Xiangren, Zhang, Hanwen, Liang, Ming, Zhu, Shan, Shi, Chunsheng, Ma, Liying, Liu, Enzuo, Zhao, Naiqin, He, Fang, Zhou, Wei, and He, Chunnian

Subjects
POLYSULFIDES, ION mobility, DENSITY functional theory, IONIC mobility, ADSORPTION capacity
Abstract

Resource‐rich FeS2 is a promising anode for potassium‐ion batteries (PIBs). However, polysulfides emerge due to FeS2 conversion during discharging, which dissolve into the ether‐based electrolyte and cause the continuous capacity degradation in PIBs. To address the polysulfides dissolution in PIBs, a graphene–shell‐encapsulated FeS2 is fabricated and embedded in N/S codoped 3D hollow carbon spheres. As a protective pocket, the graphene–shell can effectively accommodate polysulfides inside the core–shell, inhibiting the polysulfides shuttle effect to enhance cycle stability of electrode. The density functional theory (DFT) calculations demonstrate that graphene–shells have a strong adsorption capacity for polysulfides, and the interfacial interaction between KFeS2 and graphene–shell can boost the K ion mobility. As a result, the composite exhibits superior‐rate properties (524 and 224 mA h g−1 at 0.1 and 8 A g−1, respectively) and long‐term cycle stability. This work demonstrates the promotion and protective effect of the graphene–shell for the FeS2 to storage K from both experimental and computational perspectives. These research outputs can provide guidance for designing other metal‐based sulfide electrodes for PIBs. [ABSTRACT FROM AUTHOR]

Published
2022
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