NEUROTOXICITY RESEARCH
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2022
·Vol. 40
·期 2
·596-604
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IF 3.978
Wang Fei,Li Wu-lin,Shen Li-juan,Jiang Ting-ting,Xia Jian-jun,You Da-li,Hu Shan-you,Wang Li,Wu Xiao
Intracerebral hemorrhage (ICH) is the deadliest type of stroke. Oxidative stress was considered to play an important role in ICH-induced secondary injury. Crocin, the main compound isolated from Crocus sativus L., possesses a potential anti-oxidative function in many types of diseases including ICH. In the current study, the protective role of crocin in ICH-induced brain injury was investigated in the ICH model. The ICH-induced brain edema and neurological deficits were analyzed by brain edema measurement and neurological testing. The superoxide dismutase (SOD) and glutathione peroxidase (GSH-px) activity and the content of malondialdehyde (MDA) were assessed by a total superoxide dismutase assay kit. The expressions of ferroptosis-related genes were verified by quantitative real-time PCR (qPCR) and western blotting. The ICH-induced brain edema and neurological deficits were significantly decreased after treatment with crocin. Moreover, the SOD and GSH-px activities were obviously increased in the ICH with crocin-treated group compared with the ICH group, while the content of MDA was markedly decreased after treatment with crocin. Crocin inhibited ferroptosis of neuron cells, as evidenced by increased Fe 2+ concentration and the expression of GPX4, FTH1, and SLC7A11. Mechanistically, crocin treatment increased the expression and nuclear translocation of Nrf2. Our data suggest that crocin alleviates intracerebral hemorrhage–induced neuronal ferroptosis by facilitating Nrf2 nuclear translocation.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 13
·9830-9844
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IF 2.779
Liu Gu,Wang Weichao,Wang Liuying,Ge Chaoqun,Wang Wenhao,Wang Long,Xu Kejun,Chen Mengzhou
La 0.8 Sr 0.2 MnO 3 (LSMO) powder was prepared using the sol–gel method and treated at different annealing temperatures ( AT ), and the effects of AT on the crystal structure, oxygen vacancies, magnetic, electromagnetic, and microwave absorption properties of LSMO were investigated. Our results showed that with increased AT , the lattice constant and average grain size increased while the density of oxygen vacancies gradually decreased. The bond angle of Mn–O–Mn and saturation magnetization also increased gradually when AT ≤ 1373 K, and decreased slightly when AT = 1473 K. The increase of mole ratio of Mn 4+ and grain size growth also contributed to the significant improvement in electrical conductivity of LSMO, while the decreases polarization of the material weakened its dielectric properties. When the frequency range was 2–18 GHz, and AT = 1173 K, LSMO exhibited the maximum effective bandwidth, which was 4.7 GHz (13.1–17.8 GHz) when the thickness was 1.62 mm. A minimum reflection loss ( RL ) of − 21.4 dB was reached at 15.8 GHz. Furthermore, when T = 973 K, LSMO exhibited excellent low-frequency absorption properties. When the thickness was 2.2 mm, the effective bandwidth in the X-band was 3.2 GHz (8.65–11.85 GHz) and RL was − 46.3 dB at 10.4 GHz. This indicated that the annealing temperature was the key parameter for determine the effective working frequency band of LSMO. As a result, this work provides a reference for regulating the electromagnetic properties of LSMO, which is necessary to meet the microwave absorption requirements in different occasions.
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Science China-Technological Sciences
·
2022
·Vol. 65
·期 10
·2304-2316
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IF 3.903
Dai Nan,Feng Li,Zhao Li,Song Dan,Dai XingJian,Liu XiaoYing,Zhang YuXin
A one-step hydrothermal method was used to synthesize two-dimensional layered Laponite nanosheets (Laponite@diatomite) in situ on the three-dimensional biological template diatomite. The cationic dye removal ability of Laponite@diatomite with different diatomite content was studied. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), Fourier transformed-infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and N 2 adsorption-desorption technology were used to characterize synthetic materials. The effects of pH, initial concentration, dynamics, and thermodynamics behavior on the adsorption performance were further studied. La@D-0.1 had the highest adsorption efficiency, and the adsorption rate of methylene blue (MB) solution (450 mg L −1 ) reached 76.7% in the initial 5 min. At the time of adsorption equilibrium (1 h), methylene blue adsorption rate reached 86.4%. The adsorption behavior of La@D-0.1 on MB was characterized by Langumuir isotherm and with better fitting to the quasi-second-order kinetic model curve. By calculating the adsorption process’s thermodynamic parameters, we were able to illustrate that the adsorption process was exothermic. This work provides a novel idea for the synthesis of an economical and ideal, cationic dye nano-adsorbent and provides a potential application for the purification of actual dye wastewater.
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CELLULOSE
·
2022
·Vol. 29
·期 4
·2553-2563
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IF 6.123
Luo Ruiqing,Liu Ruihua,Li Yongqiang,Li Yarong,He Chiyang
The main challenge in developing polymer/covalent organic framework (COF) hybrid matrix membrane is to find effective strategies for strongly attaching crystalline COF to the supporting surface as defect-free membrane layers. In this article, we demonstrated for the first time a method for the preparation of a chitosan (CS)/COF mixed matrix dual-layer membrane based on solvothermal synthesis method. A novel surface modification strategy was developed using p-phthalaldehyde as covalent linkers between COF and CS membrane substrate, and then the nitrogen-containing covalent organic framework (NCOF) membrane was further grown in situ on the modified CS membrane substrate utilizing solvothermal synthesis methods. The resultant CS/NCOF dual-layer membrane exhibited highly homogeneous texture due to the excellent compatibility between NCOF crystals and CS matrixes. The combination of NCOF and CS membrane formed a large number of channels in the nitrogen environment, enabling the CS/NCOF dual-layer membrane to have an enhanced iodine uptake capacity up to 3.15 g/g. Furthermore, the CS/NCOF dual-layer membrane could be recycled at least five times while maintaining 95% iodine capture capacity. These properties make the obtained CS/NCOF dual-layer membrane ideal absorbent material for reversible iodine capture. This ingenious dual-layer membrane preparation strategy provides a new avenue to customize synthesis of novel membrane materials for clean energy and environmental remediation. Graphical abstract
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-12
·
IF 17.694
Zhao Yuwei,Lu Yue,Li Huiping,Zhu Yongbin,Meng You,Li Na,Wang Donghong,Jiang Feng,Mo Funian,Long Changbai,Guo Ying,Li Xinliang,Huang Zhaodong,Li Qing,Ho Johnny C.,Fan Jun,Sui Manling,Chen Furong,Zhu Wenguang,Liu Weishu,Zhi Chunyi
The performances of rechargeable batteries are strongly affected by the operating environmental temperature. In particular, low temperatures (e.g., ≤0 °C) are detrimental to efficient cell cycling. To circumvent this issue, we propose a few-layer Bi 2 Se 3 (a topological insulator) as cathode material for Zn metal batteries. When the few-layer Bi 2 Se 3 is used in combination with an anti-freeze hydrogel electrolyte, the capacity delivered by the cell at −20 °C and 1 A g −1 is 1.3 larger than the capacity at 25 °C for the same specific current. Also, at 0 °C the Zn | |few-layer Bi 2 Se 3 cell shows capacity retention of 94.6% after 2000 cycles at 1 A g −1 . This behaviour is related to the fact that the Zn-ion uptake in the few-layer Bi 2 Se 3 is higher at low temperatures, e.g., almost four Zn 2+ at 25 °C and six Zn 2+ at −20 °C. We demonstrate that the unusual performance improvements at low temperatures are only achievable with the few-layer Bi 2 Se 3 rather than bulk Bi 2 Se 3 . We also show that the favourable low-temperature conductivity and ion diffusion capability of few-layer Bi 2 Se 3 are linked with the presence of topological surface states and weaker lattice vibrations, respectively.
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JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 5
·2256-2265
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IF 2.047
Chen Shaoping,Chen Jie,Fan Wenhao,Wang Yaning,Guo Jingyun,Wang Yachao,Jiang Yu,Al-Yusufi Rasha Abdullah Ahmed,Ferhat Marhoun
Mg 2 SiNi 3, is a topologically densely packed intermetallic compound (TCP-IMC) and an excellent diffusion barrier material between nickel and Mg 2 Si-based thermoelectric material. However, even a little migration of the Mg atom from Mg 2 Si to Mg 2 SiNi 3 under the action of a driven force promotes the formation of an Mg deficiency region on the Mg 2 Si side, which destroys the balance of point defects and leads to performance deterioration. In this work, by adjusting the chemical potential of Mg across the Mg x Si 15 Ni 50 /Mg 2 Si ( x = 36, 50, 130) interface, the migration of Mg in thermoelectric material has been suppressed effectively. The results indicate that the contact performance and service stability of the Mg 130 Si 15 Ni 50 /Mg 2 Si interface has been improved by 50% compared to that of Mg 36 Si 15 Ni 50 /Mg 2 Si, which remains quite well after annealing at 400 ℃ for 480 h. TCP-IMC barrier with proper composition is a promising design for the manufacture of TEG interface to ensure its consistency in service especially under a large temperature difference.
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JOURNAL OF NANOPARTICLE RESEARCH
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2022
·Vol. 24
·期 5
·1-11
·
IF 2.533
He Jianyue,Duan Shuo,Yue Rui,Zhang Xin,Wang Qiao,Xu Lin,Liu Yan,Fang Min,Yang Qing
In this work, MoS 2 -reduced graphene oxide (rGO) composites were prepared by a simple hydrothermal reaction and characterized by SEM, Raman, XRD, and electrochemical impedance spectroscopy (EIS). The obtained MoS 2 -rGO/GCE was used for electrochemical investigation of silver nanoparticles (AgNPs) by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and chronocoulometry (CC). It was found that the MoS 2 -rGO/GCE exhibited good stability and could enhance current response of AgNP electrooxidation effectively. On the basis, a new electrochemical method was developed to detect AgNPs in aqueous solution. The proposed method exhibited satisfactory analytical performance for AgNP detection with the limit of detection (LOD) as 2.63 ng/L and the linear range from 5 to 120 ng/L. The determination assays in water samples by MoS 2 -rGO/GCE were also discussed. The assay recoveries in water samples were obtained as 94.9–99.4%. That suggested a promising application prospect in environmental analysis. Graphical abstract The MoS 2 -rGO/GCE enhanced the electrochemical response of AgNPs, which are attributed from the Ag absorbability of MoS 2 and the electrochemical signal amplification of rGO. This finding resulted in a new electrochemical approach to simple detection of AgNPs in water
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Journal of Sustainable Metallurgy
·
2022
·Vol. 8
·期 2
·754-767
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IF 3.068
Zhang Lili,Yue Qiao,Yang Hongwei
The high-temperature volatilization behavior of the SnO–SiO 2 and SnO–CaO–SiO 2 slag systems was studied by simultaneous thermal analysis. The volatilization characteristics of the two systems with different SnO contents and different heating rates were discussed, and the kinetic parameters, reaction mechanism, and thermodynamic parameters of the volatilization reaction of the slag system at high temperature were calculated. The results of thermal analysis show that the volatilization of tin slag at high temperature is related to the activity of SnO and the decomposition of stannous silicate in tin slag. The slag system has obvious volatilization effect when the content of SnO is more than 60% in the SnO–SiO 2 binary slag system. When CaO is added into the binary slag system, the volatilization of slag system becomes easier. The volatilization rate decreases with increasing heating rate. The volatilization kinetic parameters and mechanism functions of the SnO–SiO 2 and SnO–CaO–SiO 2 systems were calculated by Coats–Redfern and Achar–Brindley–Sharp–Wendworth methods. It is concluded that the volatilization of tin slag at high temperature is controlled by three-dimensional diffusion mechanism. The mechanism function is Jander equation with integral form of [1 − (1 − α ) 1/3 ] 2 and the differential form of 3/2(1 − α ) 2/3 [1 − (1 − α ) 1/3 ] −1 . The rate constants of the SnO–SiO 2 and SnO–CaO–SiO 2 systems are \(k\, = \,1.36\, \times \,10^{16} \,\exp \,\left( {{{ - \,61408.61} \mathord{\left/ {\vphantom {{ - \,61408.61} T}} \right. \kern-\nulldelimiterspace} T}} \right)\) and \(k\, = \,1.61\, \times \,10^{17} \,\exp \,\left( {{{ - \,64869.66} \mathord{\left/ {\vphantom {{ - \,64869.66} T}} \right. \kern-\nulldelimiterspace} T}} \right)\) , and the isokinetic temperatures are 1174.4 and 1208.3 °C, respectively. Finally, the thermodynamic parameters of the slag system in the high-temperature volatilization process are discussed. The activation enthalpy ΔH of the SnO–SiO 2 and SnO–CaO–SiO 2 systems is 498.33 and 526.96 kJ/mol, respectively. The activation Gibbs free energy ΔG is 436.56 and 433.87 kJ/mol, and the activation entropy ΔS is 42.66 and 62.84 J/(mol K), respectively. Graphical Abstract
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International Journal of Minerals Metallurgy and Materials
·
2022
·Vol. 29
·期 4
·896-904
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IF 3.85
Zhang Xuefeng,Jiao Shuqiang
Metal aluminum batteries (MABs) are considered potential large-scale energy storage devices because of their high energy density, resource abundance, low cost, safety, and environmental friendliness. Given their high electrical conductivity, high theoretical specific capacity, and high discharge potential, Te is considered a potential positive electrode material for MABs. Nonetheless, the critical issues induced by the chemical and electrochemical dissolution of tellurium and subsequent chemical precipitation on bare Al negative electrodes result in poor cycle stability and low discharge capacity of Al—Te batteries. Here an efficient TiB 2 -based modified layer has been proposed to address bare Al electrodes (Al/TB). Consequently, the low-voltage hysteresis and long cycle life of the Al/TB negative electrode have been achieved. In addition, the electrochemical performance of the Al—Te battery based on the Al/TB negative electrode is dramatically improved. Furthermore, the modified separator technology is introduced to match with the as-designed Al/TB negative electrode. Therefore, the record-setting long-term cycle stability of up to 500 cycles has been achieved in the Al—Te battery. The facile strategy also opens a potential route for other high-energy density battery systems, such as Al—S and Al—Se batteries.
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Nano Convergence
·
2022
·Vol. 9
·期 1
·1-13
·
IF 10.038
Liu Jiansheng,Li Jiajia,Zhang Shu,Ding Mengbin,Yu Ningyue,Li Jingchao,Wang Xiuhui,Li Zhaohui
Infrared neural stimulation with the assistance of photothermal transducers holds great promise as a mini-invasive neural modulation modality. Optical nanoparticles with the absorption in the near-infrared (NIR) window have emerged as excellent photothermal transducers due to their good biocompatibility, surface modifiability, and tunable optical absorption. However, poor activation efficiency and limited stimulation depth are main predicaments encountered in the neural stimulation mediated by these nanoparticles. In this study, we prepared a targeted polydopamine (PDA)-coated gold (Au) nanoparticles with specific binding to thermo-sensitive ion channel as nanotransducers for second near-infrared (NIR-II) photo-stimulation of neurons in rats. The targeted Au nanoparticles were constructed via conjugation of anti-TRPV1 antibody with PEGylated PDA-coated Au nanoparticles and thus exhibited potent photothermal performance property in the second NIR (NIR-II) window and converted NIR-II light to heat to rapidly activate Ca2+ influx of neurons in vitro. Furthermore, wireless photothermal stimulation of neurons in living rat successfully evoke excitation in neurons in the targeted brain region as deep as 5 mm beneath cortex. This study thus demonstrates a remote-controlled strategy for neuromodulation using photothermal nanotransducers.
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BIOTECHNOLOGY LETTERS
·
2022
·Vol. 44
·期 5
·635-642
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IF 2.716
Liu Jia,Liu Jianmin,Yang Bin,Gao Cong,Song Wei,Hu Guipeng,Liu Liming,Wu Jing
Objectives This study aimed to develop an efficient enzymatic strategy for the industrial production of phenylpyruvate (PPA) from l -phenylpyruvic acid ( l -Phe). Results l -amino acid deaminase from Proteus mirabilis was expressed in Escherichia coli BL21 (DE3) and modified to release product inhibition by employing conformational dynamics engineering. Based on structural analysis, two residues (E145/L341) were identified for reducing interactions between the product and enzyme and increasing flexibility of the protein, thereby facilitating the product release. The mutant M2 E145A/E341A exhibited a 3.84-fold reduction in product inhibition and a 1.35-fold increase in catalytic efficiency in comparison to the wild type. Finally, 81.2 g/L PPA production with a conversion of 99.6% was obtained in a 5-L bioreactor. Conclusions The engineered catalyst can significantly reduce product inhibition and facilitate the effective industrial synthesis of PPA.
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BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
·
2022
·Vol. 108
·期 6
·1033-1038
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IF 2.807
Peng Lei,Xie Dongyu,Li Cui,Guo Qiang,Chen Chuansheng,Wang Qinghai
To evaluate combined effects of co-existed pesticides and nanomaterials on aquatic plants, the toxicity of herbicide atrazine (ATZ) on Iris pseudacorus in the presence and absence of Graphene oxide (GO) was investigated using chlorophyll a fluorescence transients. Results showed that GO reduced ATZ accumulation in plant. ATZ or ATZ combined with GO mainly blocked electron transport beyond Q A at PSII as indicated by the sharp rise of the J-step level of fluorescence rise kinetics. The pronounced increase in Fm and the loss of I-step were observed when ATZ was at 2.0 mg·L − 1 implying the damage on the oxygen evolution complex and PSI. GO at environmentally relevant concentration did not exhibit significant photosynthetic inhibitory effects on I. pseudacorus . GO at 1.0 mg·L − 1 promoted photosynthesis of I. pseudacorus under ATZ stress at 2.0 mg·L − 1 . These result indicated that the presence of GO alleviated the photosynthesis inhibition by ATZ at high levels.
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