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Xiaofeng Guo,Hongbo Wang,Liying Wang,Defen Zeng,Qian Xiang,Ba Chai 대한화학회 2019 Bulletin of the Korean Chemical Society Vol.40 No.3
Synthesizing composites is one of the most effective ways to reduce the recombination probability of electron?hole pairs and to improve photocatalytic activity. In this study, our research group first combined reduced graphene oxide (rGO) with porous graphitic carbon nitride (pg-C3N4) to form pg-C3N4@rGO core-shell, and then loaded bismuth tungstate (Bi2WO6) onto the pg-C3N4@rGO to acquire a ternary composite catalyst. The results of the experiment show that, the ternary photocatalyst exhibited better phototalytic performance than pure pg-C3N4 and Bi2WO6. When the weight radio of pg-C3N4@rGO and Bi2WO6 was 100:8, the ternary photocatalyst showed the best photocatalytic performance. Its photocatalytic kinetic constant reached 68 ? 10?4 min?1, which was 13.6 times that of pg-C3N4 and 7.6 times that of Bi2WO6. The photocatalytic performance was boosted by the heterojunction structure of the ternary composite, which can effectively separate electron?hole pairs rapidly, and thereby increased quantum yield, thus improving the photocatalytic performance.
Adhesion mechanism in a DOPA-deficient foot protein from green mussels
Hwang, Dong Soo,Zeng, Hongbo,Lu, Qingye,Israelachvili, Jacob,Waite, J. Herbert The Royal Society of Chemistry 2012 SOFT MATTER Vol.8 No.20
<P>The holdfast or byssus of Asian green mussels, <I>Perna viridis</I>, contains a foot protein, pvfp-1, that differs in two respects from all other known adhesive mussel foot proteins (mfp): (1) instead of the hallmark <SMALL>L</SMALL>-3,4-dihydroxyphenylalanine (DOPA) residues in mfp-1, for example, pvfp-1 contains C<SUP>2</SUP>-mannosyl-7-hydroxytryptophan (Man7OHTrp). (2) In addition, pvfp-1 chains are not monomeric like mfp-1 but trimerized by collagen and coiled-coil domains near the carboxy terminus after a typical domain of tandemly repeated decapeptides. Here, the contribution of these peculiarities to adhesion was examined using a surface forces apparatus (SFA). Unlike previously studied mfp-1s, pvfp-1 showed significant adhesion to mica and, in symmetric pvfp-1 films, substantial cohesive interactions were present at pH 5.5. The role of Man7OHTrp in adhesion is not clear, and a DOPA-like role for Man7OHTrp in metal complexation (<I>e.g.</I>, Cu<SUP>2+</SUP>, Fe<SUP>3+</SUP>) was not observed. Instead, cation–π interactions with low desolvation penalty between Man7OHTrp and lysyl side chains and conformational changes (raveling and unraveling of collagen helix and coiled-coil domains) are the best explanations for the strong adhesion between pvfp-1 monomolecular films. The strong adhesion mechanism induced by cation–π interactions and conformational changes in pvfp-1 provides new insights for the development of biomimetic underwater adhesives.</P> <P>Graphic Abstract</P><P>Molecular interactions of a DOPA-deficient foot protein from green mussels, pvfp-1, were measured using a surface forces apparatus (SFA). The strong adhesion mechanism induced by cation–π interactions and conformational changes in pvfp-1 provides new insights for the development of biomimetic underwater adhesives. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2sm25173f'> </P>
Research on Gain Scheduling Controller of the Networked Control System with Long Delay
Jian-Qiu Deng,Hongbo Li,Cui Hao,Zeng-qi Sun 제어·로봇·시스템학회 2015 International Journal of Control, Automation, and Vol.13 No.1
This paper addresses the stabilization and optimization problem of networked control systems (NCSs) with long time delays and parameter scheduling. According to the actual network conditions, the network time delay is divided into the fixed time delay and the random time delay. Then, the stabilization controller and the gain scheduling controller are constructed, where the stabilizing control parameters are obtained with cone complementary linearization (CCL) approach and the optimizing control parameters are solved with estimation of distribution algorithm (EDA). Simulation results demonstrate the effectiveness of the proposed methods.
( Ying Huang ),( Chenjie Xu ),( Tao Zeng ),( Zhongming Li ),( Yanzhi Xia ),( Gaojian Tao ),( Tong Zhu ),( Lijuan Lu ),( Jing Li ),( Taiyuan Huang ),( Hongbo Huai ),( Benxiang Ning ),( Chao Ma ),( Xinx 대한통증학회 2021 The Korean Journal of Pain Vol.34 No.2
Background: Postherpetic neuralgia (PHN) is the most common complication of acute herpes zoster. The treatment of PHN remains a challenge for clinical pain management. Despite the effectiveness of anticonvulsants, antidepressants, and lidocaine patches in reducing PHN, many patients still face intractable pain disorders. In this randomized controlled study, we evaluated whether hydromorphone through intravenous patient-controlled analgesia (IV PCA) was effective in relieving PHN. Methods: Patients with PHN were randomly divided into two groups, one group received oral pregabalin with IV normal saline, another group received oral pregabalin with additional IV PCA hydromorphone for two weeks. Efficacy was evaluated at 1, 4, and 12 weeks after the end of the treatments. Results: Two hundred and one patients were followed up for 12 weeks. After treatment, numerical rating scale (NRS) score of patients in the hydromorphone group was significantly lower than that of the control group, and the difference of NRS scores between the two groups was statistically significant at 4 and 12 weeks after treatment. The frequency of breakthrough pain in the hydromorphone group was significantly lower than that in the control group 1 and 4 weeks after treatment. After treatment, the quality of sleep in the hydromorphone group was significantly improved compared with the control group. The most common adverse reactions in the hydromorphone group were dizziness and nausea, with no significant respiratory depression. Conclusions: IV PCA hydromorphone combined with oral pregabalin provides superior pain relief in patients with PHN, which is worthy of clinical application and promotion.
Adhesion of mussel foot proteins to different substrate surfaces
Lu, Qingye,Danner, Eric,Waite, J. Herbert,Israelachvili, Jacob N.,Zeng, Hongbo,Hwang, Dong Soo The Royal Society 2013 Journal of the Royal Society, Interface Vol.10 No.79
<P> Mussel foot proteins (mfps) have been investigated as a source of inspiration for the design of underwater coatings and adhesives. Recent analysis of various mfps by a surface forces apparatus (SFA) revealed that mfp-1 functions as a coating, whereas mfp-3 and mfp-5 resemble adhesive primers on mica surfaces. To further refine and elaborate the surface properties of mfps, the force-distance profiles of the interactions between thin mfp (i.e. mfp-1, mfp-3 or mfp-5) films and four different surface chemistries, namely mica, silicon dioxide, polymethylmethacrylate and polystyrene, were measured by an SFA. The results indicate that the adhesion was exquisitely dependent on the mfp tested, the substrate surface chemistry and the contact time. Such studies are essential for understanding the adhesive versatility of mfps and related/similar adhesion proteins, and for translating this versatility into a new generation of coatings and (including <I>in vivo</I> ) adhesive materials. </P>