CERAMICS INTERNATIONAL
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2017
·
IF 2.986
Shenglei Feng,Fupo He,Jiandong Ye
In this study, for the first time honeycomb β-tricalcium phosphate (β-TCP) scaffolds were fabricated through an extrusion technique. The physicochemical properties and cell behaviors of the honeycomb β-TCP scaffolds were investigated. The results showed that scaffolds were characterized by ordered channel-like macropores and unidirectional interconnection. The pore structure and mechanical strength could be tailored by changing the parameters of extrusion molds. The pore size of scaffolds was in the range of 400–800 µm approximately, while their compressive strength parallel to the pore direction and porosity ranged from 14 to 20 MPa and 60–70%, respectively. The in vitro cell behavior demonstrated that cells could well attach on the surfaces and grow into the inner channel-like pores of the scaffolds; the scaffolds with higher porosity showed better cell proliferation but poorer cell differentiation. The honeycomb scaffolds fabricated by extrusion technique are potential candidate for bone tissue engineering.
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HYDROMETALLURGY
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2017
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IF 2.605
Chenglong Shi,Yan Jing,Jiang Xiao,Xingquan Wang,Yongzhong Jia
A novel phosphonium ionic liquid (IL), tetrabutylphosphonium bis(2,4,4-trimethylpentyl)phosphinate([P 4444 ][BTMPP]), was prepared and characterized by NMR spectroscopy. The solvent extraction behavior of lithium from aqueous solution by this IL in toluene was investigated. The extraction behavior was carried out as a function of various parameters such as aqueous acidity, temperature and extractant concentration. The extraction efficiencies obtained in [P 4444 ][BTMPP] were compared with those observed in molecular extractant bis(2,4,4-trimethylpentyl) phosphinic acid (HBTMPP), from which the anion of the ionic liquid extractant was prepared. The extraction efficiency for extraction of lithium by [P 4444 ][BTMPP] was much higher than that for extraction by HBTMPP. The extracted species were ascertained from slop analysis method which indicated 1:1 (metal:ligand) ratio in the complex. In addition, the effects of thermodynamic parameters, the stripping of lithium from the ionic liquid, and the reusability of the phosphonium ionic liquid were studied in detail.
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Frontiers in Pharmacology
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2017
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IF 4.4
Yang Hongbin,Liu Chang,Jiang Jie,Wang Yuena,Zhang Xiaoyu
This study was aimed to evaluate the effects of celastrol, a natural compound with multiple bioactivities, on multiple sclerosis and optic neuritis (ON) in rat experimental autoimmune encephalomyelitis (EAE). EAE was induced in Sprague Dawley rats using myelin basic protein, and the animals received daily intraperitoneal injections of celastrol or vehicle for 13 days. The EAE rats showed abnormal neurobehavior and inflammatory infiltration and demyelination in the spinal cord. Significantly upregulated mRNA expression of pro-inflammatory cytokines interferon-γ and interleukin-17 and downregulated anti-inflammatory cytokines interleukin-4 were found in the spinal cord of EAE rats. In the study of ON, severely inflammatory responses like in the spinal cord were also seen in the optic nerve, as well as obvious microgliosis. Furthermore, activation of nuclear factor kappa-B and upregulated inducible nitric oxide synthase was observed in the optic nerve. In addition, apoptosis of retinal ganglion cells and dysregulation of apoptotic-associated proteins in the optic nerve were found in EAE rats. Treatment of celastrol potently restored these changes. In most of the indexes, the effects of high dose of celastrol were better than the low dose. Our data conclude that administration of celastrol attenuates multiple sclerosis and ON in EAE via anti-inflammatory and anti-apoptotic effects. These findings provide new pre-clinical evidence for the use of celastrol in treatment of multiple sclerosis.
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PubMed
高影响因子
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
·
2017
·Vol. 70
·期 8
·2175-2183
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IF 0.533
Luo Song,Jie Xiaohua,Zheng Qiongbin,Zhang Liuyan,Wu Huishu,Huang Xiaoye
In this work, we have presented a detailed study on the effect of shot peening on anodization of medium carbon steel. Anodization has been conducted on both non-shot-peened and shot-peened steel. The results show that shot peening procedure facilitates the subsequent anodization significantly. The mechanism for promoting anodization by shot peening has been discussed. After anodization, the shot-peened steel forms an amorphous α-Fe 2 O 3 film with a geometric pattern. More importantly, the α-Fe 2 O 3 film and the shot-peened layer constitute an anodized shot-peened layer, which exhibits a multi-scale structure. Due to this multi-scale structure, the anodized shot-peened layer shows a controllable wettability. It can be used as a hydrophilic or a hydrophobic coating.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2017
·Vol. 134
·期 18
·
IF 1.86
Shizhen Zhao,Xun Song,Xiuming Bu,Chong Zhu,Gang Wang,Fang Liao,Siwei Yang,Miao Wang
Because of the great demand for fluorescent materials, fluorescent dyes, semiconductor quantum dots, and carbon-based quantum dots have been studied extensively. However, the poor photostability and potential biological toxicity need to be resolved. In this study, we demonstrated the synthesis of a new biomass quantum dot, the polydopamine dot (PDADs), via a simple hydrothermal method under an acidic environment. This new biomass quantum dot showed not only remarkable photoluminescence properties (quantum yield = 0.93) but also a high stability and low toxicity. Moreover, these PDADs could be used as a fluorescent probe for the rapid detection of Cr(VI) (response time = 0.01 s). The detection limit (1 × 10 −11 M ) is the lowest detection limit reported for Cr(VI) fluorescent probes. The mechanism efficient quenching progress could have been due to the fast redox progress between the PDADs and Cr(VI). Moreover, we also showed a practical application of PDADs for Cr(VI) detection in vitro . © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 44784.
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BIOMATERIALS
·
2016
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IF 8.387
Yongjian Jiang,Shaojun Liu,Yu Zhang,Hengchao Li,Hang He,Juntao Dai,Tao Jiang,Weihang Ji,Daoying Geng,Ahmed A. Elzatahry,Abdulaziz Alghamdi,Deliang Fu,Yonghui Deng,Dongyuan Zhao
Immobilization of a ligand that selectively interacts with cancer cells to nanomaterials can enhance their diagnostic and therapeutic efficiency. In this study, we firstly demonstrate the high expression of receptor for cyclic nine-amino acid peptide LyP-1 (Cys-Gly-Asn-Lys-Arg-Thr-Arg-Gly-Cys) in both mouse and human pancreatic cancer. Based on these findings, sub-50 nm multifunctional superparamagnetic mesoporous nanospheres with surface modified with LyP-1 are rationally designed. Theses nanospheres have a core of silica-protected magnetite nanoparticle and a shell of FITC-labeled mesoporous silica , and they are able to specifically recognize and conjugate with the pancreatic cancer cell in vitro, as verified by the combined techniques of fluorescent imaging and T2 weight magnetic resonance imaging. After systematic administration, these LyP-1 immobilized nanospheres are found to actively target to mouse orthotopic xenograft of pancreatic cancer, which opens up the door for applications in early probing and diagnosis of pancreatic cancer by the multimodal imaging.
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PubMed
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FLAVOUR AND FRAGRANCE JOURNAL
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2016
·Vol. 32
·期 2
·102-111
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IF 1.693
Zujin Yang,Liyun Huang,Xingdong Yao,Hongbing Ji
Estragole (ES) has multiple biological activities and is widely used in food preservation. However, the applications of ES are limited because of its low water solubility and high volatility nature. In this paper, the β-cyclodextrin (β-CD) inclusion complex of ES was prepared by a co-precipitation method with the aim of enhancing its thermal stability and realize its controlled release. Solubility experiments were performed to evaluate the effect of β-CD on ES aqueous solubility. Release experiments of ES from its inclusion complexes were carried out at different temperatures with a relative humidity (RH) and Avrami's equation was used to analyse the release data. The antimicrobial activity of the free and included ES was also examined. The results indicated that the host–guest interactions played a crucial role in enhancing the properties of ES. The inclusion complex was investigated using physico-chemical techniques such as Fourier transform infrared spectroscopy (FTIR), thermal analysis (TGA and DSC), 1H and 2D nuclear magnetic resonance (NMR). The inclusion processes between β-CD and ES were simulated using the semi-empirical PM3 and ONIOM [B3LYP/6-31g(d):PM3] methods. Copyright © 2016 John Wiley & Sons, Ltd.
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HIGH PERFORMANCE POLYMERS
·
2016
·
IF 1.045
Yang Liu,Yuping Ai,Pengfei Huo,Haitao Huang,Jiyou Gu
In this study, a new kind of membrane material, an aromatic zwitterionic polyimide (PI) copolymer, was synthesized through a one-pot polymerization reaction by precise variation of the molar ratios of different monomers with specific groups. The zwitterionic PI ultrafiltration (UF) membrane was prepared through an immersion precipitation phase inversion method and thoroughly characterized by scanning electron microscopy, water contact angle measurement, protein adsorption measurement, and UF experiment. The zwitterionic PI membrane showed significantly improved hydrophilicity and permeability and stable antifouling property. The amount of bovine serum albumin adsorbed on the zwitterionic PI membrane was considerably lower compared with the reference PI membrane. According to the cycle UF experiment for protein solution, the zwitterionic PI membrane had a water flux recovery ratio of 86.7%, compared with only 61.1% for the reference PI membrane. Moreover, the irreversible fouling of the zwitterionic PI membrane was significantly decreased, suggesting superior antifouling property. This new approach to the preparation of a zwitterionic polymer seems promising for potential applications in separation membrane.
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CHEMICAL PHYSICS
·
2024
·
IF 2
Mingyang Gao,Shicheng Wang,Zexuan Wang,Simeng Wang,Yushu Sun,Qianyun Li,Sen Lei,Qiang Li,Zhiyong Zhang,Xiaolong Ma,Wu Zhao
This study addresses a scientific challenge by elucidating the influence of calcination temperature on the properties and electromagnetic wave absorption capabilities of NiCo 2 O 4 , a material whose performance is inherently tied to its preparation process. Specifically, we systematically investigate how varying calcination temperatures not only diversify the material’s composition and morphology but also enhance its electromagnetic wave absorption properties. By controlling the calcination temperature, we not only achieve the successful synthesis of NiCo 2 O 4 but also unravel intricate correlations among calcination conditions, material composition, and wave absorption performance. Notably, NiCo 2 O 4 sample calcined at 400 °C exhibits remarkable electromagnetic wave absorption, marked by an exceptional maximum reflection loss of −53.93 dB and a broad absorption bandwidth spanning 6.24 GHz. These insights contribute to advancing the frontiers of NiCo 2 O 4 utilization, particularly in the realm of electromagnetic wave absorption and beyond, underscoring the novelty and impact of our research.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zhen Chen,Ziqi Zhang,Yixin Yu,Yu Guo,Jing Liu,Zhiling Zhu
A universal theory for predicting the catalytic activity of hydrolytic nanozymes has yet to be developed. Herein, by investigating the polarization and hydrolysis mechanisms of nanomaterials towards amide bonds, carbocation charge was identified as a key electronic descriptor for predicting catalytic activity in amide hydrolysis. Through machine learning correlation analysis and the Sure Independence Screening and Sparsifying Operator (SISSO) algorithm, this descriptor was interpreted to associate with the d-band center and Lewis acidity on the nanomaterial surface. On this basis, copper nanoparticles (Cu NPs) were discovered to exhibit significant hydrolytic activity. Further, peptidomic analysis and molecular dynamics simulations showed that Cu NPs demonstrated substrate selectivity. In the presence of water molecules, hydrophobic amino acid residues were driven towards the nanomaterial surface by hydrophobic groups of proteins, leading to the preferential hydrolysis of peptide bonds linked to these residues. This study provided a theoretic framework for predicting highly efficient hydrolytic nanozymes with broad potential applications.
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Desalination and Water Treatment
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2024
·
IF 1
Chao Wang,Su Xu,WenChao Liao,TsingHai Wang
Manganese oxide-based catalysts have been frequently adopted to activate peroxymonosulfate (PMS) for the degradation of refractory contaminants such as sulfamethoxazole (SMX). In this study, the Co-doped ɑ-MnO 2 catalyst was prepared to validate the concept that the introduction of additional oxidation states and structural defects due to the doping process would significantly enhance the efficiency of PMS activation. Among all Co@ ɑ-MnO 2 catalysts prepared, the activator with the mole ratio of Co/Mn 0.05:1 exhibited the highest SMX degradation. A near 100% removal of SMX (1000 μ g / L ) was achieved within 1 min in a condition with 10.0 mmol/L PMS and 0.5 g/L Co 0.05 @ ɑ - MnO 2 at 25 ℃ . The effects of catalyst dose, PMS concentration, initial SMX concentration, solution pH, temperature, and coexisting cations, anions, and humic acid (HA) on SMX degradation were studied. The impressive sustainability of the Co 0.05 @ ɑ-MnO 2 /PMS system was confirmed by its capability of operating over a wide pH range, its stability after multiple cycles, and its insensitivity to the coexisting of cations. The presence of high electrophilic anions, such as NO 2 ¯ and HCO 3 ¯ , on the other hand, would compromise the SMX degradation. Furthermore, reactive oxygen species (ROS) generated in the Co@ ɑ-MnO 2 /PMS system were identified by scavenger tests and electron paramagnetic resonance (EPR). Singlet oxygen ( 1 O 2 ) was verified to be the major route contributing to the degradation of SMX. In addition, sulfate radicals ( SO4 •¯ ), superoxide radicals (O 2 •¯ ), and hydroxyl radicals (ּ • OH) were also generated in the Co@ ɑ-MnO 2 /PMS system and participated in SMX degradation. Therefore, the Co@ ɑ-MnO 2 is a promising catalyst for PMS activation in the degradation of SMX.
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CHEMICAL ENGINEERING JOURNAL
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2017
·
IF 6.216
Lian-Kui Wu,Hao Wu,Hui-Bin Zhang,Hua-Zhen Cao,Guang-Ya Hou,Yi-Ping Tang,Guo-Qu Zheng
In this work, graphene oxide (GO) and copper ferrite composite was synthesized on Fe-Ni foam via a one-step hydrothermal method. The foam substrate not only acts as holding material for GO and copper ferrite, but also makes this adsorbent convenient to recycle. The morphology and surface composition of the graphene oxide/copper ferrite foam (GCFF) were analyzed by scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectra. The adsorption behavior of As(III) and As(V) onto the GCFF was studied as a function of solution pH, temperature, contact time, initial concentrations, and competing ions. Results show this GCFF is an efficient adsorbent for arsenic with high adsorption capacities for both As(III) and As(V) owing to the synergistic effect of CuFe 2 O 4 and GO. The maximum adsorption capacities for As(III) and As(V) are 51.64 and 124.69 mg g −1 , respectively. Adsorption isotherms study indicates a Langmuir model of adsorption. In addition, the GCFF also reveals good recyclability due to the unique foam structure and the adsorption capacity is almost not deteriorated after eight recycles. Column experiment suggests that 96% As(V) can be removed from water solution after 100 bed volume test.
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