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De Tollenaere M, Meunier M, Lapierre L, Chapuis E, Guilleret A, Harrison I, Jean T, Rannou A, Scandolera A, Reynaud R. High molecular weight hyaluronic acid vectorised with clay provides long-term hydration and reduces skin brightness. Skin Res Technol 2024; 30:e13672. [PMID: 38591218 PMCID: PMC11002775 DOI: 10.1111/srt.13672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 03/11/2024] [Indexed: 04/10/2024]
Abstract
BACKGROUND Hyaluronic acid (HA) is a widely used active cosmetic ingredient. Its multiple skin care benefits are modulated by its molecular weight. Low molecular weight (LMW) HA can penetrate the skin, but high molecular weight (HMW) HA remains at the surface. Here, we assessed how vectorization of HMW HA with bentonite clay-achieved with an innovative technology-enhances its cosmetic and hydrating properties. MATERIALS AND METHODS The two HA forms were applied to skin explants; their penetration and smoothing effects were monitored by Raman spectroscopy and scanning electron microscopy. The two forms were biochemically characterised by chromatography, enzyme sensitivity assays, and analysis of Zeta potential. Cosmetics benefits such as, the smoothing effect of vectorised-HA was assessed in ex vivo experiments on skin explants. A placebo-controlled clinical study was finally conducted applying treatments for 28 days to analyse the final benefits in crow's feet area. RESULTS Raman spectroscopy analysis revealed native HMW HA to accumulate at the surface of skin explants, whereas vectorised HMW HA was detected in deeper skin layers. This innovative vectorisation process changed the zeta potential of vectorised HMW HA, being then more anionic and negative without impacting the biochemical structure of native HA. In terms of cosmetic benefits, following application of vectorised HMW HA ex vivo, the skin's surface was visibly smoother. This smoothing was clinically confirmed, with a significant reduction in fine lines. CONCLUSION The development of innovative process vectorising HMW HA allowed HMW HA penetration in the skin. This enhanced penetration extends the clinical benefits of this iconic cosmetic ingredient.
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Choi D, Lee CH, Lee HB, Lee MW, Jo SM. Electropositive Membrane Prepared via a Simple Dipping Process: Exploiting Electrostatic Attraction Using Electrospun SiO 2/PVDF Membranes with Electronegative SiO 2 Shell. Polymers (Basel) 2023; 15:polym15102270. [PMID: 37242846 DOI: 10.3390/polym15102270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 05/04/2023] [Accepted: 05/06/2023] [Indexed: 05/28/2023] Open
Abstract
This research aimed to develop a simple and cost-effective method for fabricating electropositive membranes for highly efficient water filtration. Electropositive membranes are novel functional membranes with electropositive properties and can filter electronegative viruses and bacteria using electrostatic attraction. Because electropositive membranes do not rely on physical filtration, they exhibit high flux characteristics compared with conventional membranes. This study presents a simple dipping process for fabricating boehmite/SiO2/PVDF electropositive membranes by modifying an electrospun SiO2/PVDF host membrane using electropositive boehmite nanoparticles (NPs). The surface modification enhanced the filtration performance of the membrane, as revealed by electronegatively charged polystyrene (PS) NPs as a bacteria model. The boehmite/SiO2/PVDF electropositive membrane, with an average pore size of 0.30 μm, could successfully filter out 0.20 μm PS particles. The rejection rate was comparable to that of Millipore GSWP, a commercial filter with a pore size of 0.22 μm, which can filter out 0.20 μm particles via physical sieving. In addition, the water flux of the boehmite/SiO2/PVDF electropositive membrane was twice that of Millipore GSWP, demonstrating the potential of the electropositive membrane in water purification and disinfection.
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Affiliation(s)
- Dalsu Choi
- Chemical Engineering Department, Myongji University, Yongin-si 17058, Gyeonggi-do, Republic of Korea
| | - Cheol Ho Lee
- Center for Underground Physics, Institute for Basic Science, Daejeon 34126, Republic of Korea
| | - Han Bi Lee
- Composite Materials Applications Research Center, Korea Institute of Science and Technology, Wanju-gun 55324, Jeollabuk-do, Republic of Korea
| | - Min Wook Lee
- Composite Materials Applications Research Center, Korea Institute of Science and Technology, Wanju-gun 55324, Jeollabuk-do, Republic of Korea
| | - Seong Mu Jo
- Composite Materials Applications Research Center, Korea Institute of Science and Technology, Wanju-gun 55324, Jeollabuk-do, Republic of Korea
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Chen J, Li D, Zhou C, Zhu Y, Lin C, Guo L, Le W, Gu Z, Chen B. Principle Superiority and Clinical Extensibility of 2D and 3D Charged Nanoprobe Detection Platform Based on Electrophysiological Characteristics of Circulating Tumor Cells. Cells 2023; 12. [PMID: 36672240 DOI: 10.3390/cells12020305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/21/2022] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
The electrical characteristic of cancer cells is neglected among tumor biomarkers. The development of nanoprobes with opposing charges for monitoring the unique electrophysiological characteristics of cancer cells. Micro-nano size adsorption binding necessitates consideration of the nanoprobe's specific surface area. On the basis of the electrophysiological characteristics of circulating tumor cells (CTCs), clinical application and performance assessment are determined. To demonstrate that cancer cells have a unique pattern of electrophysiological patterns compared to normal cells, fluorescent nanoprobes with opposing charges were developed and fabricated. Graphene oxide (GO) was used to transform three-dimensional (3D) nanoprobes into two-dimensional (2D) nanoprobes. Compare 2D and 3D electrophysiological magnetic nanoprobes (MNP) in clinical samples and evaluate the adaptability and development of CTCs detection based on cell electrophysiology. Positively charged nanoprobes rapidly bind to negatively charged cancer cells based on electrostatic interactions. Compared to MNPs(+) without GO, the GO/MNPs(+) nanoprobe is more efficient and uses less material to trap cancer cells. CTCs can be distinguished from normal cells that are fully unaffected by nanoprobes by microscopic cytomorphological inspection, enabling the tracking of the number and pathological abnormalities of CTCs in the same patient at various chemotherapy phases to determine the efficacy of treatment. The platform for recognizing CTCs on the basis of electrophysiological characteristics compensates for the absence of epithelial biomarker capture and size difference capture in clinical performance. Under the influence of electrostatic attraction, the binding surface area continues to influence the targeting of cancer cells by nanoprobes. The specific recognition and detection of nanoprobes based on cell electrophysiological patterns has enormous potential in the clinical diagnosis and therapeutic monitoring of cancer.
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Sun JD, Li Q, Haoyang WW, Zhang DW, Wang H, Zhou W, Ma D, Hou JL, Li ZT. Adsorption-Based Detoxification of Endotoxins by Porous Flexible Organic Frameworks. Mol Pharm 2022; 19:953-962. [PMID: 35102736 DOI: 10.1021/acs.molpharmaceut.1c00923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Bacterial lipopolysaccharides (LPS, endotoxins) cause sepsis that is responsible for a huge amount of mortality globally. However, their neutralization or detoxification remains an unmet medical need. We envisaged that cationic organic frameworks with persistent hydrophobic porosity may adsorb and thus neutralize LPS through a combination of cooperative ion-pairing electrostatic attraction and hydrophobicity. We here report the preparation of two water-soluble flexible organic frameworks (FOF-1 and FOF-2) from tetratopic and ditopic precursors through quantitative formation of hydrazone bonds at room temperature. The two FOFs are revealed to possess hydrodynamic diameters, which range from 20 to 120 nm, depending on the concentrations. Dynamic light scattering and isothermal titration calorimetric and chromogenic limulus amebocyte lysate experiments indicate that both frameworks are able to adsorb and thus reduce the concentration of free LPS molecules in aqueous solution, whereas cytokine inhibition experiments with RAW264.7 support that this adsorption can significantly decrease the toxicity of LPS. In vivo experiments with mice (five males per group) show that the injection of FOF-1 at a dose of 0.6 mg/kg realizes the survival of all of the mice administrated with LPS of the d-galactosamine (d-Gal)-sensitized absolute lethal dose (LD100, 0.05 mg/kg), whereas its maximum tolerated dose for mice is determined to be 10 mg/kg. These findings provide a new promising sequestration strategy for the development of porous agents for the neutralization of LPS.
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Affiliation(s)
- Jian-Da Sun
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Qian Li
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Wei-Wei Haoyang
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Dan-Wei Zhang
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Hui Wang
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Wei Zhou
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Da Ma
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Jun-Li Hou
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China
| | - Zhan-Ting Li
- Department of Chemistry, Fudan University, 2205 Songhu Road, Shanghai 200438, China.,Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, 2205 Songhu Road, Shanghai 200438, China
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Hwang J, Sung M, Seo B, Shin K, Lee JY, Park BJ, Kim JW. Energetically Preferred Bilayered Coacervation of Oppositely Charged ZrHP Nanoplatelets. ACS Appl Mater Interfaces 2021; 13:7664-7671. [PMID: 33533585 DOI: 10.1021/acsami.0c18116] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A platform is introduced for bilayered coacervation of oppositely charged nanoplatelets (NPLs) at the oil-water interface. To this end, we synthesized two types of zirconium hydrogen phosphate (ZrHP) NPLs, cationically charged NPLs (CNPLs), and anionically charged NPLs (ANPLs) by conducting surface-initiated atom transfer radical polymerization. Taking advantage of the platelet geometry and controlled wettability, we demonstrated that ANPLs and CNPLs coacervate themselves to form a bilayered NPL membrane at the interface, which was directly confirmed by confocal laser scanning microscopy. Via theoretical consideration using the hit-and-miss Monte Carlo method, we determined that electrostatic attraction-driven coacervation of ANPLs and CNPLs at the interface shows a minimum attachment energy of ∼ -106 kBT, which is comparable to the cases where NPLs charged with the same type of ions are attached. Finally, this unique and novel interfacial coacervation behavior allowed us to develop a pH-responsive smart Pickering emulsion system.
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Affiliation(s)
- Jaemin Hwang
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Minchul Sung
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Bokgi Seo
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyounghee Shin
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
- KIURI (Korea Initiative for fostering University of Research & Innovation) Research Group, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jin Yong Lee
- Department of Bionano Technology, Hanyang University, Ansan 15588, Republic of Korea
| | - Bum Jun Park
- Department of Chemical Engineering (BK21 FOUR Intergrated Engineering Program), Kyung Hee University, Yongin 17104, Republic of Korea
| | - Jin Woong Kim
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
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Wu G, Khodaparast L, Khodaparast L, De Vleeschouwer M, Housmans J, Houben B, Schymkowitz J, Rousseau F. Investigating the mechanism of action of aggregation-inducing antimicrobial Pept-ins. Cell Chem Biol 2021; 28:524-536.e4. [PMID: 33434517 DOI: 10.1016/j.chembiol.2020.12.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 11/20/2020] [Accepted: 12/16/2020] [Indexed: 12/24/2022]
Abstract
Aggregation can be selectively induced by aggregation-prone regions (APRs) contained in the target proteins. Aggregation-inducing antimicrobial peptides (Pept-ins) contain sequences homologous to APRs of target proteins and exert their bactericidal effect by causing aggregation of a large number of proteins. To better understand the mechanism of action of Pept-ins and the resistance mechanisms, we analyzed the phenotypic, lipidomic, and transcriptomic as well as genotypic changes in laboratory-derived Pept-in-resistant E. coli mutator cells. The analysis showed that the Pept-in resistance mechanism is dominated by a decreased Pept-in uptake, in both laboratory-derived mutator cells and clinical isolates. Our data indicate that Pept-in uptake involves an electrostatic attraction between the Pept-in and the bacterial membrane and follows a complex mechanism potentially involving many transporters. Furthermore, it seems more challenging for bacteria to become resistant toward Pept-ins that are less dependent on electrostatic attraction for uptake, suggesting that future Pept-ins should be selected for this property.
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Jiang H, Shi D, Sun X, Wang S, Li Y, Chang B, Zhang B, Shao Y, Wu Y, Hao X. Boron Carbonitride Lithium-Ion Capacitors with an Electrostatically Expanded Operating Voltage Window. ACS Appl Mater Interfaces 2020; 12:47425-47434. [PMID: 32975401 DOI: 10.1021/acsami.0c12163] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Lithium-ion capacitors (LICs) have emerged as attractive energy storage devices to bridge the gap between lithium-ion batteries and supercapacitors. While the distinct charge storage kinetics between the anode and the cathode is still a challenge to the widespread application of LICs, the key to improving the energy density of these devices is to widen the operating voltage window and balance the mismatch of the electrode kinetics. To this end, we propose a strategy based on electrostatic attraction by adjusting the B and N atom contents of boron carbonitride (BCN) electrode materials to alter their electronegativities and successfully prepared B-rich and N-rich BCN nanotubes (BCNNTs) via a facile solid-phase synthesis approach. The B-rich BCN (B-BCN) cathode and N-rich BCN (N-BCN) anode noticeably enhance the adsorption of anions and cations, promoting a matching degree between the anode and cathode. In particular, the rationally designed B-BCN//N-BCN LIC achieves a maximum voltage range of 4.8 V, setting a new record for LICs. Furthermore, the energy density reaches up to 200 Wh kg-1 (based on the total mass of cathodic and anodic active materials). Density functional theory calculations provided insight into the mechanism underlying our strategy of widening the voltage range. Our philosophy provides new design guidelines and alternatives for identifying and optimizing high-performance electrodes for energy storage devices.
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Affiliation(s)
- Hehe Jiang
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Dong Shi
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Xiucai Sun
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Shouzhi Wang
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Yanlu Li
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Bin Chang
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Baoguo Zhang
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
| | - Yongliang Shao
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
- Department of Materials Science and Engineering, Qilu University of Technology, Jinan 250353, P. R. China
| | - Yongzhong Wu
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
- Department of Materials Science and Engineering, Qilu University of Technology, Jinan 250353, P. R. China
| | - Xiaopeng Hao
- State Key Lab of Crystal Materials, Shandong University, Jinan 250100, P. R. China
- Department of Materials Science and Engineering, Qilu University of Technology, Jinan 250353, P. R. China
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Guan X, Jiang L, Cai L, Zhang L, Hu X. A New Co-Crystal of Synthetic Drug Rosiglitazone with Natural Medicine Berberine: Preparation, Crystal Structures, and Dissolution. Molecules 2020; 25:E4288. [PMID: 32962058 DOI: 10.3390/molecules25184288] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 11/16/2022] Open
Abstract
A co-crystal of rosiglitazone (Rsg) with berberine (Bbr), Rsg-Bbr, was prepared by the solvent evaporation method and characterized. The results showed that the electrostatic attraction existed between the nitrogen anion of rosiglitazone and the quaternary ammonium cation of berberine, and C-H···O hydrogen bonds were formed between Rsg and Bbr. In the crystal structure, rosiglitazone molecules stack into a supramolecular layer through π-π interactions while π-π interactions between berberine cations also result in a similar layer. The co-crystal presented a low moisture adsorption curve in the range of 0−95% relative humidity values at 25 °C. The improved dissolution rate of rosiglitazone in pH = 6.8 buffer solution could be achieved after forming co-crystal.
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Bao H, Dong Y, Wu X, Li G, Zhu F, Guan W, Wang X, Su Z. Ultrafast Absorption of Polysulfides through Electrostatic Confinement by Protonated Molecules for Highly Efficient Li-S Batteries. ACS Appl Mater Interfaces 2020; 12:36220-36227. [PMID: 32701264 DOI: 10.1021/acsami.0c10811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The lithium-sulfur battery is a promising high-energy-density storage system, which suffers from severe capacity fading due to the "shuttle effect" and low Coulombic efficiency caused by the dissolution of lithium polysulfides. At the molecular level, suppressing the shuttle effect has been greatly required for high-performance Li-S batteries. Herein, we propose a new strategy by utilizing a protonated organic absorbent (N1,N4-bis(pyridine-3-ylmethyl)butane-1,4-diammonium nitrate ([H2PBD]2+·(NO3)22-) for ultrafast absorption of polysulfides through electrostatic attractions and for fixing the polysulfides in the cathode by hydrogen-bond interactions. A lithium-sulfur battery cathode based on a commercial carbon black (CB) and an absorbent (10%) with high sulfur content (70%) exhibits a low capacity decay of 0.099% per cycle over 400 cycles at a rate of 0.5C along with 91% Coulombic efficiency. This strategy and the finding of an electrostatic absorbent offer a new alternative insight into designing cheaper lithium-sulfur batteries for their practical application in the future.
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Affiliation(s)
- Hongfei Bao
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Yujiao Dong
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Xuesong Wu
- Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun 130022, China
| | - Guangfu Li
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Fulong Zhu
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Wei Guan
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Xinlong Wang
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
| | - Zhongmin Su
- National & Local United Engineering Laboratory for Power Battery, Key Laboratory of Polyoxometalate Science, Institute of Functional Material Chemistry, Northeast Normal University, Changchun, Jilin 130024, China
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Liu Z, Wang Q, Zhang B, Wu T, Li Y. Efficient Removal of Bisphenol A Using Nitrogen-Doped Graphene-Like Plates from Green Petroleum Coke. Molecules 2020; 25:E3543. [PMID: 32756422 PMCID: PMC7435634 DOI: 10.3390/molecules25153543] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/30/2020] [Accepted: 07/30/2020] [Indexed: 12/07/2022] Open
Abstract
Green petroleum coke, a form of industrial waste produced in the oil-refining process, was used to synthesize nitrogen-doped graphene-like plates (N-GLPs) together with melamine. In this study, characterization and batch experiments were performed to elucidate the interaction mechanism of N-GLPs and bisphenol A (BPA). Structural analysis of N-GLPs, including scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET), and X-ray photoelectron spectroscopy (XPS), showed an obvious graphene-like structure and successful nitrogen doping. In addition, compared with 8.0 m2/g for green petroleum coke, the BET surface area of N-GLPs markedly increased to 96.6 m2/g. The influences of various factors, including contact time, temperature, and initial pH on BPA removal efficiency were investigated. It was found that 92.0% of BPA was successfully removed by N-GLPs at 50 °C. Based on the adsorption experiments, it was shown that electrostatic attraction, hydrogen bonding, and π-π interaction enhanced the adsorption capacity of N-GLPs for BPA. According to the thermodynamic data, the adsorption process was spontaneous, physical, and endothermic in nature. Therefore, N-GLPs are efficient adsorbent material to remove BPA from wastewater.
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Affiliation(s)
- Zhipeng Liu
- Shandong Provincial Research Center for Water Pollution Control, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China; (Z.L.); (B.Z.)
| | - Quanyong Wang
- China Urban Construction Design and Research Institute Co., Ltd., Jinan 250101, China;
| | - Bei Zhang
- Shandong Provincial Research Center for Water Pollution Control, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China; (Z.L.); (B.Z.)
| | - Tao Wu
- Key Laboratory of Colloid and Interface Science of Education Ministry, Shandong University, Jinan 250100, China
| | - Yujiang Li
- Shandong Provincial Research Center for Water Pollution Control, School of Environmental Science and Engineering, Shandong University, Jinan 250100, China; (Z.L.); (B.Z.)
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Abstract
1ʹ-(2-Acryloxyethyl)-3,3ʹ-dimethyl-6-nitrospiro[2 H-1-benzopyran-2,2ʹ-indoline] (SPA) was synthesized and grafted onto a water-soluble carboxymethyl chitin (CMCH) macromolecule to prepare a photochromic copolymer (CMCH-g-SPA). The structure of CMCH-g-SPA was characterized by Fourier-transform infrared (FT-IR) spectroscopy, thermogravimetric (TG) analysis, X-ray diffraction (XRD) analysis, water-solubility evaluation, and UV-vis spectroscopy. XRD patterns of CMCH-g-SPA revealed that grafting copolymerization disrupts the CMCH semicrystalline structure, thus improving water solubility. UV-vis spectroscopy results supported the negative photochromic behavior of the merocyanine (MC) form of CMCH-g-SPA (CMCH-g-MCA) present in a water solution of the target copolymer. In addition to high solvent polarity, the intermolecular and intramolecular electrostatic attraction between the indolenine cation and the COO− anion were found to be influencing factors, which stabilize these MC form of spiropyran groups grafted onto CMCH. In a water solution, visible light bleaching was completed over a short period (8 minutes) under artificial visible light irradiation and the thermal coloration reaction, whose rate constant at 25 °C was 4.64 × 10−4 s−1, which fit the first-order reaction equation. After ten photochromic cycles in water solution, the relative absorption intensity of CMCH-g-MCA decreased by 7.92%.
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Affiliation(s)
- Bin-Bin Sun
- College of Materials Science and Engineering, Xi'an University of Technology, Xi'an, China.,Department of Chemical Engineering, Shaanxi Vocational and Technical College of Defense Industry, Xi'an, China
| | - Bing-Hua Yao
- College of Materials Science and Engineering, Xi'an University of Technology, Xi'an, China
| | - Zheng-Sheng Fu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, China
| | - Yang-Qing He
- College of Materials Science and Engineering, Xi'an University of Technology, Xi'an, China
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Liu S, Liu C, You Y, Wang Y, Wei R, Liu X. Fabrication of BaTiO 3-Loaded Graphene Nanosheets-Based Polyarylene Ether Nitrile Nanocomposites with Enhanced Dielectric and Crystallization Properties. Nanomaterials (Basel) 2019; 9:nano9121667. [PMID: 31766711 PMCID: PMC6955990 DOI: 10.3390/nano9121667] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/18/2019] [Accepted: 11/20/2019] [Indexed: 11/29/2022]
Abstract
In this paper, barium titanate@zinc phthalocyanine (BT@ZnPc) and graphene oxide (GO) hybrids (BT@ZnPc-GO) connected by calcium ions are prepared by electrostatic adsorption, and then introduced into polyarylene ether nitrile (PEN) to obtain composites with enhanced dielectric and crystallization properties. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) results confirm the successful fabrication of the BT@ZnPc-GO. BT@ZnPc-GO and PEN composites (BT@ZnPc-GO/PENs) are obtained through the solution-casting method. BT@ZnPc-GO demonstrates well compatibility with PEN due to its unique structure and the organic layer of ZnPc at the periphery of BT. On the other hand, BT and GO contribute a high dielectric constant of the composites obtained. In addition, the BT@ZnPc-GO can be used as a nucleating agent to promote the crystallization of the nanocomposites. As a result, The BT@ZnPc-GO/PEN exhibits a dielectric constant of 6.4 at 1 kHz and crystallinity of 21.03% after being isothermally treated at 280 °C for 2 h at the GO content of 0.75 wt %. All these results indicate that the hybrid nanofiller BT@ZnPc-GO can be an effective additive for preparing high-performance PEN-based nanocomposites.
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Affiliation(s)
| | | | | | | | - Renbo Wei
- Correspondence: (R.W.); (X.L.); Tel.: +86-028-8320-7326 (R.W. & X.L.)
| | - Xiaobo Liu
- Correspondence: (R.W.); (X.L.); Tel.: +86-028-8320-7326 (R.W. & X.L.)
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Zhang X, Xiong B, Li J, Qian L, Liu L, Liu Z, Fang P, He C. Dependence of Dye Molecules Adsorption Behaviors on Pore Characteristics of Mesostructured MOFs Fabricated by Surfactant Template. ACS Appl Mater Interfaces 2019; 11:31441-31451. [PMID: 31370391 DOI: 10.1021/acsami.9b06517] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In this work, mesostructured metal-organic frameworks (MOFs) of MIL-101-Crs with different specific surface areas were synthesized successfully under solvothermal conditions using cationic surfactant cetyltrimethyl ammonium bromide (CTAB) as a structural template. It was found that crystallinity degrees, specific surface areas, and pore size distributions strongly depended on the loading of CTAB. Nitrogen adsorption and positron annihilation lifetime spectroscopy (PALS) results showed that the mean mesopore size increased with loading more CTAB due to the formation of larger templated mesopores. Although Langmuir adsorption of both methylene blue (MB) and methyl orange (MO) was confirmed in MIL-101-Crs, the experimental results showed different adsorption behaviors for them depending on the dye molecular size, pore structure, and charge properties of dye molecules/MOFs in solution. The MB molecules were found to be mainly adsorbed in the interspaces between grains and the templated mesopores, whereas the MO molecules were adsorbed in the inherent pores as well as the templated ones in MOFs due to the unsaturated metal sites' electrostatic attraction on them. Remarkably, MO adsorption capacity was observed to be proportional to the specific surface area, which allowed one to get a good linear fitting of experimental data. Interestingly, the good consistence between the fitting experimental parameter, that is, the number of adsorbed MO-s per unit specific surface area, and the calculated one according to our rough estimation strongly suggests that MO-s are electrostatically attracted and rotating around the unsaturated metal sites on MOFs' inner surfaces, which exclude other MO-s to be adsorbed around due to the "hindering effect" of the rotating motion.
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Affiliation(s)
- Xiaowei Zhang
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology , Wuhan University , Wuhan 430072 , China
| | - Bangyun Xiong
- School of Materials Science and Energy Engineering , Foshan University , Foshan 528000 , China
| | - Jingjing Li
- School of Materials Science and Energy Engineering , Foshan University , Foshan 528000 , China
| | - Libing Qian
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology , Wuhan University , Wuhan 430072 , China
| | - Lei Liu
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology , Wuhan University , Wuhan 430072 , China
| | - Zhe Liu
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology , Wuhan University , Wuhan 430072 , China
| | - Pengfei Fang
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology , Wuhan University , Wuhan 430072 , China
| | - Chunqing He
- Key Laboratory of Nuclear Solid State Physics Hubei Province, School of Physics and Technology , Wuhan University , Wuhan 430072 , China
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14
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Kim MW, An S, Seok H, Yoon SS, Yarin AL. Electrostatic Transparent Air Filter Membranes Composed of Metallized Microfibers for Particulate Removal. ACS Appl Mater Interfaces 2019; 11:26323-26332. [PMID: 31259518 DOI: 10.1021/acsami.9b05686] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Particulate matter (PM) from ever-increasing industrialization poses a great public health risk. Although fiber-based filters are used effectively to block PM, filters with high packing densities suffer from excessive pressure drops. Electret filters bypass intermediate- or large-sized particles and thus capture only small particles, the motion of which can be influenced by weak electrostatic fields. In this study, we demonstrate the fabrication of metallized fibers that produce intense electric fields, thereby enabling capture of PMs of a variety of sizes produced by burning incense. The filter consisting of these metallized fibers effectively removes moving particles from air. An electricity-driven filter is relatively thin and has a low packing density, making it light, portable, transparent, and inexpensive. The sizes of the pores between the metallized fibers are readily controlled by manipulating the electrospinning and electroplating times. Sufficiently large pores permit efficient airflow and thus increase permeability without risking an excessive pressure drop. The metallized fiber filter is washable and thus reusable. In this study, a PM removal rate of >97% was recorded using a filter designed under optimal conditions.
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Affiliation(s)
- Min-Woo Kim
- School of Mechanical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Seongpil An
- Department of Mechanical and Industrial Engineering , University of Illinois at Chicago , 842 W. Taylor Street , Chicago , Illinois 60607-7022 , United States
| | - Hyunjun Seok
- School of Mechanical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Sam S Yoon
- School of Mechanical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Alexander L Yarin
- Department of Mechanical and Industrial Engineering , University of Illinois at Chicago , 842 W. Taylor Street , Chicago , Illinois 60607-7022 , United States
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15
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Peng J, Jia S, Bian J, Zhang S, Liu J, Zhou X. Recent Progress on Electromagnetic Field Measurement Based on Optical Sensors. Sensors (Basel) 2019; 19:E2860. [PMID: 31252626 PMCID: PMC6651561 DOI: 10.3390/s19132860] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 06/13/2019] [Accepted: 06/20/2019] [Indexed: 11/17/2022]
Abstract
Electromagnetic field sensors are widely used in various areas. In recent years, great progress has been made in the optical sensing technique for electromagnetic field measurement, and varieties of corresponding sensors have been proposed. Types of magnetic field optical sensors were presented, including probes-based Faraday effect, magnetostrictive materials, and magnetic fluid. The sensing system-based Faraday effect is complex, and the sensors are mostly used in intensive magnetic field measurement. Magnetic field optical sensors based on magnetic fluid have high sensitivity compared to that based on magnetostrictive materials. Three types of electric field optical sensors are presented, including the sensor probes based on electric-optic crystal, piezoelectric materials, and electrostatic attraction. The majority of sensors are developed using the sensing scheme of combining the LiNbO3 crystal and optical fiber interferometer due to the good electro-optic properties of the crystal. The piezoelectric materials-based electric field sensors have simple structure and easy fabrication, but it is not suitable for weak electric field measurement. The sensing principle based on electrostatic attraction is less commonly-used sensing methods. This review aims at presenting the advances in optical sensing technology for electromagnetic field measurement, analyzing the principles of different types of sensors and discussing each advantage and disadvantage, as well as the future outlook on the performance improvement of sensors.
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Affiliation(s)
- Jun Peng
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shuhai Jia
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Jiaming Bian
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Shuo Zhang
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jianben Liu
- State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan 430074, China
| | - Xing Zhou
- School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
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16
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Gennari O, Marchesano V, Rega R, Mecozzi L, Nazzaro F, Fratianni F, Coppola R, Masucci L, Mazzon E, Bramanti A, Ferraro P, Grilli S. Pyroelectric Effect Enables Simple and Rapid Evaluation of Biofilm Formation. ACS Appl Mater Interfaces 2018; 10:15467-15476. [PMID: 29676891 DOI: 10.1021/acsami.8b02815] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Biofilms are detrimental to human life and industrial processes due to potential infections, contaminations, and deterioration. Therefore, the evaluation of microbial capability to form biofilms is of fundamental importance for assessing how different environmental factors may affect their vitality. Nowadays, the approaches used for biofilm evaluation are still poor in reliability and rapidity and often provide contradictory results. Here, we present what we call biofilm electrostatic test (BET) as a simple, rapid, and highly reproducible tool for evaluating in vitro the ability of bacteria to form biofilms through electrostatic interaction with a pyroelectrified carrier. The results show how the BET is able to produce viable biofilms with a density 6-fold higher than that on the control, after just 2 h incubation. The BET could pave the way to a rapid standardization of the evaluation of bacterial resistance among biofilm-producing microorganisms. In fact, due to its simplicity and cost-effectiveness, it is well suited for a rapid and easy implementation in a microbiology laboratory.
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Affiliation(s)
- O Gennari
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
| | - V Marchesano
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
| | - R Rega
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
| | - L Mecozzi
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
| | - F Nazzaro
- Institute of Food Sciences , National Research Council (CNR-ISA) , Via Roma 64 , 83100 Avellino , Italy
| | - F Fratianni
- Institute of Food Sciences , National Research Council (CNR-ISA) , Via Roma 64 , 83100 Avellino , Italy
| | - R Coppola
- DIAA-University of Molise , Via de Sanctis, snc , 86100 Campobasso , Italy
| | - L Masucci
- Institute of Microbiology , Catholic University of the Sacred Heart, "A. Gemelli" Foundation , Largo A. Gemelli 8 , 00168 Rome , Italy
| | - E Mazzon
- IRCCS Centre for Neuroscience Bonino-Pulejo , Strada Statale 113 , 98124 Messina , Italy
| | - A Bramanti
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
- IRCCS Centre for Neuroscience Bonino-Pulejo , Strada Statale 113 , 98124 Messina , Italy
| | - P Ferraro
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
| | - S Grilli
- Institute of Applied Sciences & Intelligent Systems , National Research Council (CNR-ISASI) , Via Campi Flegrei 34 , 80078 Pozzuoli (NA) , Italy
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17
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Li MS, Cowley EA, El Hiani Y, Linsdell P. Functional organization of cytoplasmic portals controlling access to the cystic fibrosis transmembrane conductance regulator (CFTR) chloride channel pore. J Biol Chem 2018; 293:5649-5658. [PMID: 29475947 DOI: 10.1074/jbc.ra117.001373] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 01/26/2018] [Indexed: 12/15/2022] Open
Abstract
The cystic fibrosis transmembrane conductance regulator (CFTR) is a Cl- channel that apparently has evolved from an ancestral active transporter. Key to the CFTR's switch from pump to channel function may have been the appearance of one or more "lateral portals." Such portals connect the cytoplasm to the transmembrane channel pore, allowing a continuous pathway for the electrodiffusional movement of Cl- ions. However, these portals remain the least well-characterized part of the Cl- transport pathway; even the number of functional portals is uncertain, and if multiple portals do exist, their relative functional contributions are unknown. Here, we used patch-clamp recording to identify the contributions of positively charged amino acid side chains located in CFTR's cytoplasmic transmembrane extensions to portal function. Mutagenesis-mediated neutralization of several charged side chains reduced single-channel Cl- conductance. However, these same mutations differentially affected channel blockade by cytoplasmic suramin and Pt(NO2)42- anions. We considered and tested several models by which the contribution of these positively charged side chains to one or more independent or non-independent portals to the pore could affect Cl- conductance and interactions with blockers. Overall, our results suggest the existence of a single portal that is lined by several positively charged side chains that interact electrostatically with both Cl- and blocking anions. We further propose that mutations at other sites indirectly alter the function of this single portal. Comparison of our functional results with recent structural information on CFTR completes our picture of the overall molecular architecture of the Cl- permeation pathway.
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Affiliation(s)
- Man-Song Li
- From the Department of Physiology & Biophysics, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Elizabeth A Cowley
- From the Department of Physiology & Biophysics, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Yassine El Hiani
- From the Department of Physiology & Biophysics, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Paul Linsdell
- From the Department of Physiology & Biophysics, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
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18
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Liu H, Shan Z, Huang W, Wang D, Lin Z, Cao Z, Chen P, Meng S, Chen L. Self-Assembly of Silicon@Oxidized Mesocarbon Microbeads Encapsulated in Carbon as Anode Material for Lithium-Ion Batteries. ACS Appl Mater Interfaces 2018; 10:4715-4725. [PMID: 29336545 DOI: 10.1021/acsami.7b16760] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The utilization of silicon/carbon composites as anode materials to replace the commercial graphite is hampered by their tendency to huge volumetric expansion, costly raw materials, and complex synthesis processes in lithium-ion batteries. Herein, self-assembly method is successfully applied to prepare hierarchical silicon nanoparticles@oxidized mesocarbon microbeads/carbon (Si@O-MCMB/C) composites for the first time, in which O-MCMB core and low-cost sucrose-derived carbon shell not only effectively enhance the electrical conductivity of the anode, but also mediate the dramatic volume change of silicon during cycles. At the same time, the carbon can act as "adhesive", which is crucial in enhancing the adhesive force between Si and O-MCMB in the composites. The as-obtained Si@O-MCMB/C delivers an initial reversible capacity of 560 mAh g-1 at 0.1 A g-1, an outstanding cyclic retention of 92.8% after 200 cycles, and respectable rate capability. Furthermore, the synthetic route presented here is efficient, less expensive, simple, and easy to scale up for high-performance composites.
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Affiliation(s)
- Huitian Liu
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Zhongqiang Shan
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Wenlong Huang
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Dongdong Wang
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Zejing Lin
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Zongjie Cao
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Peng Chen
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Shuxian Meng
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
| | - Li Chen
- School of Chemical Engineering and Technology and ‡Department of Chemistry, School of Science, Tianjin University , Tianjin 300350, China
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19
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Habashneh AY, El-Abadelah MM, Bardaweel SK, Taha MO. Synthesis and Structure-Activity Relationship; Exploration of some Potent Anti-Cancer Phenyl Amidrazone Derivatives. Med Chem 2017; 14:468-477. [PMID: 29205121 DOI: 10.2174/1573406414666171204143157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 10/25/2017] [Accepted: 11/22/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Amidrazones have been reported to have significant anti-tumor properties against several cancer cell lines. OBJECTIVES The current project aims to profile the structure-anticancer activity relationship of phenyl-amidrazons. METHODS Fifteen phenyl-amidrazone-piperazine derivatives were prepared and tested against four cancer cell lines (leukemia, prostate, breast and colon cancers). RESULTS Six compounds illustrated low micromolar anticancer IC50 values, while the remaining compounds were either inactive or of moderate potencies. All compounds were virtually nontoxic against normal fibroblast cells. CONCLUSION Docking into the oncogenic kinase bcr/abl illustrated the critical importance of (i) phalogen substituent on the ligand's phenyl ring and (ii) the presence of positive ionizable moiety at the ligand's piperazine fragment for anticancer activity.
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Affiliation(s)
- Almeqdad Y Habashneh
- Faculty of Science, Chemistry Department, The University of Jordan, Amman, Jordan
| | | | - Sanaa K Bardaweel
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, The University of Jordan, Amman, Jordan
| | - Mutasem O Taha
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, The University of Jordan, Amman, Jordan.,Drug Discovery Unit, Faculty of Pharmacy, The University of Jordan, Amman, Jordan
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20
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Xiao L, Sun J, Liu L, Hu R, Lu H, Cheng C, Huang Y, Wang S, Geng J. Enhanced Photothermal Bactericidal Activity of the Reduced Graphene Oxide Modified by Cationic Water-Soluble Conjugated Polymer. ACS Appl Mater Interfaces 2017; 9:5382-5391. [PMID: 28112908 DOI: 10.1021/acsami.6b14473] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Surface modification of graphene is extremely important for applications. Here, we report a grafting-through method for grafting water-soluble polythiophenes onto reduced graphene oxide (RGO) sheets. As a result of tailoring of the side chains of the polythiophenes, the modified RGO sheets, that is, RGO-g-P3TOPA and RGO-g-P3TOPS, are positively and negatively charged, respectively. The grafted water-soluble polythiophenes provide the modified RGO sheets with good dispersibility in water and high photothermal conversion efficiencies (ca. 88%). Notably, the positively charged RGO-g-P3TOPA exhibits unprecedentedly excellent photothermal bactericidal activity, because the electrostatic attractions between RGO-g-P3TOPA and Escherichia coli (E. coli) bind them together, facilitating direct heat conduction through their interfaces: the minimum concentration of RGO-g-P3TOPA that kills 100% of E. coli is 2.5 μg mL-1, which is only 1/16th of that required for RGO-g-P3TOPS to exhibit a similar bactericidal activity. The direct heat conduction mechanism is supported by zeta-potential measurements and photothermal heating tests, in which the achieved temperature of the RGO-g-P3TOPA suspension (2.5 μg mL-1, 32 °C) that kills 100% of E. coli is found to be much lower than the thermoablation threshold of bacteria. Therefore, this research demonstrates a novel and superior method that combines photothermal heating effect and electrostatic attractions to efficiently kill bacteria.
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Affiliation(s)
- Linhong Xiao
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , 29 Zhongguancun East Road, Haidian District, Beijing 100190, China
- University of Chinese Academy of Sciences , 19A Yuquan Road, Beijing 100049, China
| | - Jinhua Sun
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , 29 Zhongguancun East Road, Haidian District, Beijing 100190, China
| | - Libing Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Rong Hu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Huan Lu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Chungui Cheng
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , 29 Zhongguancun East Road, Haidian District, Beijing 100190, China
| | - Yong Huang
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , 29 Zhongguancun East Road, Haidian District, Beijing 100190, China
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Jianxin Geng
- Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , 29 Zhongguancun East Road, Haidian District, Beijing 100190, China
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21
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Zhang X, Shen J, Zhuo N, Tian Z, Xu P, Yang Z, Yang W. Interactions between Antibiotics and Graphene-Based Materials in Water: A Comparative Experimental and Theoretical Investigation. ACS Appl Mater Interfaces 2016; 8:24273-24280. [PMID: 27548426 DOI: 10.1021/acsami.6b09377] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Complex interactions between antibiotics and graphene-based materials determine both the adsorption performance of graphene-based materials and the transport behaviors of antibiotics in water. In this work, such interactions were investigated through adsorption experiments, instrumental analyses and theoretical DFT calculations. Three typical antibiotics (norfloxacin (NOR), sulfadiazine (SDZ) and tetracycline (TC)) and different graphene-based materials (divided into two groups: graphene oxides-based ones (GOs) and reduced GOs (RGOs)) were employed. Optimal adsorption pHs for NOR, SDZ, and TC are 6.2, 4.0, and 4.0, respectively. At corresponding optimal pHs, NOR favored RGOs (adsorption capability: ∼50 mg/g) while SDZ preferred GOs (∼17 mg/g); All adsorbents exhibited similar uptake of TC (∼70 mg/g). Similar amounts of edge carboxyls of both GOs and RGOs wielded electrostatic attraction with NOR and TC, but not with SDZ. According to DFT-calculated most-stable-conformations of antibiotics-adsorbents complexes, the intrinsic distinction between GOs and RGOs was the different amounts of sp(2) and sp(3) hybridization regions: π-π electron donor-acceptor effect of antibiotic-sp(2)/sp(3) and H-bonds of antibiotic-sp(3) coexisted. Binding energy (BE) of the former was larger for NOR; the latter interaction was stronger for SDZ; two species of TC at the optimal pH, i.e., TC(+) and TC(0), possessed larger BE with sp(3) and sp(2) regions, respectively.
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Affiliation(s)
- Xuntong Zhang
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University , Nanjing 210023, PR China
| | - Jiachun Shen
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University , Nanjing 210023, PR China
| | - Ning Zhuo
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University , Nanjing 210023, PR China
| | - Ziqi Tian
- Department of Chemistry, University of California , Riverside, California 92521, United States
| | - Peiran Xu
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University , Nanjing 210023, PR China
| | - Zhen Yang
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University , Nanjing 210023, PR China
| | - Weiben Yang
- School of Chemistry and Materials Science, Jiangsu Provincial Key Laboratory of Material Cycling and Pollution Control, Nanjing Normal University , Nanjing 210023, PR China
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22
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Huang Z, Lei X, Liu Y, Wang Z, Wang X, Wang Z, Mao Q, Meng G. Tapered Optical Fiber Probe Assembled with Plasmonic Nanostructures for Surface-Enhanced Raman Scattering Application. ACS Appl Mater Interfaces 2015; 7:17247-17254. [PMID: 26186260 DOI: 10.1021/acsami.5b04202] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Optical fiber-Raman devices integrated with plasmonic nanostructures have promising potentials for in situ probing remote liquid samples and biological samples. In this system, the fiber probe is required to simultaneously demonstrate stable surface enhanced Raman scattering (SERS) signals and high sensitivity toward the target species. Here we demonstrate a generic approach to integrate presynthesized plasmonic nanostructures with tapered fiber probes that are prepared by a dipping-etching method, through reversed electrostatic attraction between the silane couple agent modified silica fiber probe and the nanostructures. Using this approach, both negatively and positively charged plasmonic nanostructures with various morphologies (such as Au nanosphere, Ag nanocube, Au nanorod, Au@Ag core-shell nanorod) can be stably assembled on the tapered silica fiber probes. Attributed to the electrostatic force between the plasmonic units and the fiber surface, the nanostructures do not disperse in liquid samples easily, making the relative standard deviation of SERS signals as low as 2% in analyte solution. Importantly, the detection sensitivity of the system can be optimized by adjusting the cone angle (from 3.6° to 22°) and the morphology of nanostructures assembled on the fiber. Thus, the nanostructures-sensitized optical fiber-Raman probes show great potentials in the applications of SERS-based environmental detection of liquid samples.
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Affiliation(s)
- Zhulin Huang
- †Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Xing Lei
- §Anhui Provincial Key Laboratory of Photonics Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Ye Liu
- §Anhui Provincial Key Laboratory of Photonics Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Zhiwei Wang
- †Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Xiujuan Wang
- †Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Zhaoming Wang
- †Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Qinghe Mao
- §Anhui Provincial Key Laboratory of Photonics Devices and Materials, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, P. R. China
| | - Guowen Meng
- †Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, P. R. China
- ‡University of Science and Technology of China, Hefei 230026, P. R. China
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El Hiani Y, Linsdell P. Functional Architecture of the Cytoplasmic Entrance to the Cystic Fibrosis Transmembrane Conductance Regulator Chloride Channel Pore. J Biol Chem 2015; 290:15855-15865. [PMID: 25944907 DOI: 10.1074/jbc.m115.656181] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 12/19/2022] Open
Abstract
As an ion channel, the cystic fibrosis transmembrane conductance regulator must form a continuous pathway for the movement of Cl(-) and other anions between the cytoplasm and the extracellular solution. Both the structure and the function of the membrane-spanning part of this pathway are well defined. In contrast, the structure of the pathway that connects the cytoplasm to the membrane-spanning regions is unknown, and functional roles for different parts of the protein forming this pathway have not been described. We used patch clamp recording and substituted cysteine accessibility mutagenesis to identify positively charged amino acid side chains that attract cytoplasmic Cl(-) ions to the inner mouth of the pore. Our results indicate that the side chains of Lys-190, Arg-248, Arg-303, Lys-370, Lys-1041, and Arg-1048, located in different intracellular loops of the protein, play important roles in the electrostatic attraction of Cl(-) ions. Mutation and covalent modification of these residues have charge-dependent effects on the rate of Cl(-) permeation, demonstrating their functional role in maximization of Cl(-) flux. Other nearby positively charged side chains were not involved in electrostatic interactions with Cl(-). The location of these Cl(-)-attractive residues suggests that cytoplasmic Cl(-) ions enter the pore via a lateral portal located between the cytoplasmic extensions to the fourth and sixth transmembrane helices; a secondary, functionally less relevant portal might exist between the extensions to the 10th and 12th transmembrane helices. These results define the cytoplasmic mouth of the pore and show how it attracts Cl(-) ions from the cytoplasm.
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Affiliation(s)
- Yassine El Hiani
- Department of Physiology and Biophysics, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada
| | - Paul Linsdell
- Department of Physiology and Biophysics, Dalhousie University, Halifax, Nova Scotia B3H 4R2, Canada.
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Zhang M, Yao Q, Lu C, Li Z, Wang W. Layered double hydroxide-carbon dot composite: high-performance adsorbent for removal of anionic organic dye. ACS Appl Mater Interfaces 2014; 6:20225-33. [PMID: 25313875 DOI: 10.1021/am505765e] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
It would be of significance to design a green composite for efficient removal of contaminants. Herein, we fabricated a facile and environmentally friendly composite via direct assembly of surface passivated carbon dots with abundant oxygen-containing functional groups on the surface of the positively charged layered double hydroxide (LDH). The resulting LDH-carbon dot composites were characterized by X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectroscopy, high resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), and N2 adsorption-desorption technique. The adsorption performances of the resulting LDH-carbon dot composites were evaluated for the removal of anionic methyl blue dye. Taking advantage of the combined benefits of LDH and carbon dots, the as-prepared composites exhibited high uptake capability of methyl blue (185 mg/g). The adsorption behavior of this new adsorbent fitted well with Langmuir isotherm and the pseudo-second-order kinetic model. The reasons for the excellent adsorption capacity of methyl blue on the surface of the LDH-carbon dot hybrid were further discussed. A probable mechanism was speculated to involve the cooperative contributions of hydrogen bonding between methyl blue and carbon dots and electrostatic attraction between methyl blue and LDH, in the adsorption process. This work is anticipated to open up new possibilities in fabricating LDH-carbon dot materials in dealing with anionic dye pollutants.
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Affiliation(s)
- Manlin Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing 100029, China
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25
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Abstract
Noncovalent interactions are ubiquitous in molecular and condensed-phase environments, and hence a reliable theoretical description of these fundamental interactions could pave the way toward a more complete understanding of the microscopic underpinnings for a diverse set of systems in chemistry and biology. In this work, we demonstrate that recent algorithmic advances coupled to the availability of large-scale computational resources make the stochastic quantum Monte Carlo approach to solving the Schrödinger equation an optimal contender for attaining "chemical accuracy" (1 kcal/mol) in the binding energies of supramolecular complexes of chemical relevance. To illustrate this point, we considered a select set of seven host-guest complexes, representing the spectrum of noncovalent interactions, including dispersion or van der Waals forces, π-π stacking, hydrogen bonding, hydrophobic interactions, and electrostatic (ion-dipole) attraction. A detailed analysis of the interaction energies reveals that a complete theoretical description necessitates treatment of terms well beyond the standard London and Axilrod-Teller contributions to the van der Waals dispersion energy.
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Affiliation(s)
- Alberto Ambrosetti
- †Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Dario Alfè
- ‡Department of Earth Sciences and Department of Physics and Astronomy and London Centre for Nanotechnology and Thomas Young Centre@UCL, University College, London WC1E6BT, United Kingdom
| | - Robert A DiStasio
- §Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Alexandre Tkatchenko
- †Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
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Jin T, Huang M, Smith P, Jiang J, Xiao TS. The structure of the CARD8 caspase-recruitment domain suggests its association with the FIIND domain and procaspases through adjacent surfaces. Acta Crystallogr Sect F Struct Biol Cryst Commun 2013; 69:482-7. [PMID: 23695559 PMCID: PMC3660883 DOI: 10.1107/s1744309113010075] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 04/12/2013] [Indexed: 12/29/2022]
Abstract
CARD8 plays crucial roles in regulating apoptotic and inflammatory signaling pathways through the association of its caspase-recruitment domain (CARD) with those of procaspase-9 and procaspase-1. The CARD8 CARD has also been predicted to form an intramolecular complex with its FIIND domain. Here, the first crystal structure of the CARD8 CARD is reported; it adopts a six-helix bundle fold with a unique conformation of the α6 helix that is described here for the first time. The surface of the CARD8 CARD displays a prominent acidic patch at its α2, α3 and α5 helices that may interact with the procaspase-9 CARD, whereas an adjacent charged surface at its α3 and α4 helices may associate with the CARD8 FIIND domain without interfering with the CARD-CARD interaction. This suggests that the function of CARD8 may be regulated by both intramolecular and intermolecular interactions involving electrostatic attractions.
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Affiliation(s)
- Tengchuan Jin
- Structural Immunobiology Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD 20892-0430, USA
| | - Mo Huang
- Structural Immunobiology Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD 20892-0430, USA
| | - Patrick Smith
- Structural Immunobiology Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD 20892-0430, USA
| | - Jiansheng Jiang
- Structural Immunobiology Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD 20892-0430, USA
| | - T. Sam Xiao
- Structural Immunobiology Unit, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 4 Memorial Drive, Bethesda, MD 20892-0430, USA
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