Crystals
·
2019
·Vol. 9
·期 7
·338
·
IF 2.061
Hangling Zhai,Chaoqun Bian,Yuxia Yu,Longfeng Zhu,Lingfeng Guo,Xiao Wang,Qinqin Yu,Jie Zhu,Xuebo Cao
The development of the sustainable synthesis of zeolites has become a very hot topic in recent years. Herein, we report a sustainable route for synthesizing all-silica SOD zeolite under solvent-free conditions. The method of solvent-free synthesis includes mixing, grinding, and heating raw solids. The all-silica SOD zeolite obtained was well characterized by multiple measurement techniques (XRD, SEM, IR, thermogravimetric-differential thermal analysis (TG-DTA), and magic angel spinning nuclear magnetic resonance (MAS NMR)). The crystallization process of all-silica SOD zeolite was also investigated in detail by XRD, SEM, UV-Raman, and MAS NMR techniques. In addition, the effects of the crystallization compositions, including the molar ratios of Na2O/SiO2and ethylene glycol/SiO2, on the synthesis of the pure all-silica SOD zeolite were investigated at different temperatures.Keywords:zeolite;sustainable route;all-silica SOD;solvent-free synthesis
研究领域:
材料科学
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环境科学
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DOI
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 5
·e17589
·
IF 4.167
Jiaqi Liu,Xuan Tang,Xiaowu Liang,Luogang Wu,Feifei Zhang,Qi Shi,Jiangfeng Yang,Jinxiang Dong,Jinping Li
Various adsorbents for CH 4 /N 2 separation were developed to enrich low-concentration coal-mine methane. Most are hydrophilic and cannot treat moist coal-mine methane. We report for the first time a microporous zeolitic imidazolate framework Co(dcIm) 2 (TUT-100) with superhydrophobic properties for CH 4 /N 2 separation. The CH 4 adsorption capacity and CH 4 /N 2 selectivity were as high as 45.29 cm 3 /cm 3 and 6.3 (298 K, 1 bar), respectively, which results from the suitable SOD cage size (0.80 nm). The H 2 O adsorption was lower than 6.3 cm 3 /g at 298 K and near saturated pressure due to the hydrophobic group Cl. Breakthrough experiments were carried out to indicate the significant potential for CH 4 /N 2 adsorption separation in a humid environment. The adsorption behavior of the gas mixture on the TUT-100 was investigated by the Grand Canonical Monte Carlo method and coupled with the experimental data.
研究领域:
材料科学
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能源工程
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化学工程
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DOI
高影响因子
Journal of Materials Chemistry C
·
2022
·Vol. 10
·期 41
·15613-15619
·
IF 8.067
Xinzhe Zhou,Tiezhen Ren,Jian Yin,Xiurong Zhang,Peng Li,Huanrong Li
Developing a broadband yellow emission phosphor that covers green to orange light regions is an effective way to achieve high-quality solid-state lighting. A broadband yellow phosphor with excellent thermal stability was obtained by heating a europium-doped SOD zeolite under a reducing atmosphere. Under UV excitation, the phosphor exhibits a broad emission band (FWHM = 120 nm) and high thermal stability (80% intensity at 423 K). Prototype white LEDs using this broadband yellow-emit phosphor, a blue-emit phosphor (NaMgBO3:Ce3+), and a red-emit phosphor (Sr2Si5N8:Eu2+) show excellent color quality (CRI = 93, R10 = 88) and a low correlated color temperature (CCT = 4219 K), outperforming most of the tricolor phosphor-converted NUV-LEDs. This work highlights the great potential of lanthanide-doped zeolites in developing promising phosphors for high quality lighting.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
JOURNAL OF MOLECULAR RECOGNITION
·
2018
·Vol. 31
·期 8
·e2714
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IF 1.868
Juxin Yin,Jianjian Zhuang,Shaowu Lv,Ying Mu
Excessive reactive oxygen species (ROS) levels are harmful to the body. The peroxidase, GPx, and the superoxide dismutase, SOD, are important antioxidant enzymes for preventing ROS-induced damage. Se-CuZn-65P is an enzyme mimetic with dual GPx and SOD antioxidant function. However, currently, its production is mainly based on the cysteine auxotrophic expression technique, which is inefficient, expensive, and time consuming. In this study, we combined protein engineering and the chemical mutation method to synthesize Se-CuZn-65P. The DNA sequence encoding the 65 amino acid peptide with the desired sequence transformations to incorporate the SOD and the GPx catalytic sites was cloned and expressed in a soluble protein expression vector. The protein yield increased up to 152 mg/L, which is 10 times higher than in previous studies. The SOD and GPx activity of Se-CuZn-65P was high (1181 U/mg and 753 U/μmol, respectively). The binding constant of glutathione was 5.6 × 10 4 L·mol −1 , which shows that Se-CuZn-65P efficiently catalyzed hydrogen peroxide reduction by glutathione. Mitochondrial damage experiments confirmed the double protective role of the Se-CuZn-65P peptide and demonstrated functional synergy between the SOD and the GPx domains, which indicates its potential to be used in the treatment of ROS-related diseases. Our research may give a new thought to increase the yield of mimic.
研究领域:
生物化学
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分子生物学
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药理学
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生物技术
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产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
·
2024
·
IF 9.7
Shuai Han,Zhe Wang,Junjian Yu,Fei Wang,Xiangwei Li
Low-silica SOD zeolites are among the most promising inorganic materials for mixed matrix membranes (MMMs). However, the gas separation performance is severely hindered by the non-selective voids formed by both the zeolite and polymer membranes, as well as the rigid layer. In this work, SOD-liquid-M2070 PL type I porous liquid was synthesized and subsequently filled into an Amidoxime-functionalized polymer of intrinsic microporosity (AO-PIM) to prepare MMMs. The fillers and MMMs were characterized using FTIR, SEM, TGA, XRD, and gas permeation techniques. SOD-liquid-M2070 PL facilitates the rapid diffusion of CO 2 and H 2 gas molecules for efficient gas separation. The liquid-like fluidity of SOD-liquid-M2070 PL improves the formation of non-selective pores in the SOD and polymer matrix membranes to enhance gas permeability and selectivity. The CO 2 , H 2 permeability and CO 2 /N 2 , H 2 /N 2 selectivity of MMMs composed of 5 wt% SOD-liquid-M2070 PL with optimal filling ratio were increased by 248%, 246%, and 173%, 222%, respectively, compared with pure membranes. It exceeds the 2008 Robeson limit for H 2 /N 2 and approaches much closer to the 2019 Robeson limit for CO 2 /N 2 . The field of green environment presents a promising development prospect for low silica SOD zeolite, which exhibits high separation efficiency.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
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2024
·
IF 4.4
Shuai Han,Junjian Yu,Fei Wang,Xiangwei Li,Hongzhe Ni,Yuchao Wang,Zhe Wang
Zeolite is a commonly utilized filler in mixed matrix membranes (MMMs) to enhance the effectiveness of gas separation due to its molecular sieving properties with high separation coefficients. However, the compatibility and suitability between the zeolite and the polymer membrane are prerequisites for preparing homogeneous membranes and an essential factor affecting gas separation performance. Herein, we synthesized nucleus-crown-crown structures by surface modification of SOD zeolite and prepared MMMs by doping them into Polymers of Intrinsic Microporosity (PIM-1) for efficient gas separation. FTIR, XRD, SEM, and TGA characterized the fillers and the MMMs. The average particle size of the filler was estimated to be approximately 552.43 nm by SEM images. The surface-modified SOD zeolite facilitates the rapid permeation of specific gas molecules and enhances the dispersion of SOD zeolite in the PIM-1 membrane, thereby improving gas separation performance. Compared with pure PIM-1 membrane, the MMMs with a loading of 7 wt % exhibited CO2 and H2 permeabilities reaching up to 7000.0 and 3600.0 Barrer; their selectivities for CO2/N2 and H2/N2 were measured at 17.7 and 9.29, respectively. MMMs with the best fill ratios exceeded the 2008 Robeson upper limits. The methods for surface modification of SOD zeolites provide a new way for the application of SOD zeolite in the area of gas separation.
研究领域:
材料科学
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化学工程
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DOI
高影响因子
Advanced Healthcare Materials
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2024
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IF 10
Jia He,Wei Zhang,Yuyu Cui,Liang Cheng,Xu-Lin Chen,Xianwen Wang
Free radicals are secreted following skin damage and cause oxidative stress and inflammatory reactions that increase the difficulty of wound healing. In this study, copper-based nanozyme Cu 2 Se nanosheets (NSs) are synthesized by an anion-exchange strategy and apply to wounds with F127 hydrogels to investigate the healing effect of this nanozyme composite hydrogels on wounds. Cu 2 Se NSs have a large number of catalytically active centers, are simple to synthesize, require few reaction conditions and have a short synthesis cycle. In vitro experiments have shown that Cu 2 Se NSs possess superoxide dismutase (SOD)-like activity and nitrogen radical scavenging activity and promote angiogenesis and fibroblast migration. The doping of Cu 2 Se NSs into the F127 hydrogel does not have a significantly affect on the properties of the hydrogel. This hybridized hydrogel not only adapts to the irregular and complex morphology of acute wounds but also prolongs the duration of nanozyme action on the wound, thus promoting wound healing. Transcriptomic analysis further reveals the potential therapeutic mechanism of the Cu 2 Se/F127 hydrogel in promoting acute wound healing. Animal experiments have shown that the Cu 2 Se/F127 hydrogel has good biosafety. The Cu 2 Se/F127 hydrogel provides an innovative idea for the development of hydrogel dressings for the treatment of acute wounds.
研究领域:
材料科学
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生物医学工程
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伤口愈合
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纳米技术
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
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2020
·
IF 2.463
Dan Mo,Jingnan Shi,Dandan Zhao,Yuzhen Zhang,Yifu Guan,Yunjun Shen,Hedong Bian,Fuping Huang,Shengfu Wu
Three transition metal complexes (Fe III , Co III , and Cu II ) were synthesized by hydrothermal method from bis(2-hydroxy-1-naphthalene-formaldehyde) 3,4-diaminobenzoic acid (H 3 L). They were characterized by infrared spectroscopy, elemental analysis, mass spectrometry. Artificial enzymes were constructed by hybridizing bovine serum albumin (BSA) with the metal complexes and characterized by MALDI-TOF-MS. The interaction of the metal complexes with BSA was studied by Raman spectroscopy, fluorescence spectroscopy, and circular dichroism spectroscopy. All the three metal complexes can cause the intrinsic fluorescence quenching of BSA, which is mainly static quenching. The addition of metal complexes changed the conformation of BSA and decreased the content of α–helix structure. The activity of SOD was measured by xanthine oxidase-NBT method. All metal complexes exhibited certain SOD activity, which increased after the formation of hybrid proteins. Asymmetric oxidation of thioether catalyzed by artificial enzymes was studied. The optimum reaction conditions were obtained by optimizing the reaction conditions. Substrate universality experiments were carried out under the optimum reaction conditions, showing good activity and enantioselectivity, with enantioselectivity up to 81%.
研究领域:
生物化学
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金属有机化学
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酶学
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DOI
高影响因子
Frontiers in Nutrition
·
2022
·
IF 6.59
Wu Yue,Yang Jingjuan,Xu Chengmei,Li Qiuqi,Ma Yage,Zhao Shenglan,Zhuang Jiachen,Shen Fei,Wang Qianqian,Feng Fengqin,Zhang Xi
The sea cucumber peptides (SCPs) from Acaudina leucoprocta were derived from the patented bio-enzyme digestion technology and the molecular weight of obtained SCPs was <10 kDa. In this study, we investigated the possible anti-aging effects of SCPs on the model of Caenorhabditis elegans and the underlying mechanisms. SCPs extend the average lifespan of nematodes by 31.46%. SCPs enhance the anti-stress capacity of C. elegans by improving heat resistance and mobility, Also, the accumulated potential oxidative stress inducers like lipofuscin and reactive oxygen species (ROS) were reduced to 40.84 and 71.43%. In addition, SCPs can increase the antioxidant capacity in nematodes by enhancing the activity of SOD and CAT and reducing MDA accumulation in nematodes to 32.44%. Mechanistically, SCPs could mediate DAF-16/DAF-2/SOD-3/OLD-1/PEPT-1 axis to improve antioxidant capacity and extend lifespan in nematodes. Taken together, these findings provide a direction for the anti-aging effects of sea cucumber peptides and new insights into the further purifications of SCPs and future research on aging.
研究领域:
老年学
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分子生物学
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营养保健品
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产品关联
DOI
PubMed
高影响因子
Food & Function
·
2023
·Vol. 14
·期 9
·4392-4405
·
IF 6.1
Chi Zhang,Yujia Hu,Yi Yuan,Jingke Guo,Henian Li,Qiaoling Li,Shutao Liu
Oxidative stress is generally considered inseparable from the development and exacerbation of ulcerative colitis (UC). Therefore, reducing oxidative stress has become a possible way to alleviate UC. In this study, the therapeutic effects of different doses of liposome-embedded superoxide dismutase (L-SOD) on mice with DSS-induced UC were systematically investigated. The results showed that L-SOD significantly attenuated the signs of colitis in mice, including colonic shortening, diarrhoea, bloody stools, and histopathological changes. L-SOD ameliorated DSS-induced oxidative damage, increased SOD, catalase (CAT), and glutathione (GSH) activities, and decreased malondialdehyde (MDA) levels. In addition, L-SOD ameliorated the inflammatory response by inhibiting the expression of myeloperoxidase (MPO) and pro-inflammatory cytokines and protected barrier function by promoting the expression of the tight junction proteins occludin and ZO-1 in the colon. Importantly, the results demonstrated a bell-shaped distribution of therapeutic effects relative to the administered dose, with an optimal dose of 150 000 U kg−1. These results indicate that L-SOD has great potential as an ingredient in functional foods for the prevention and mitigation of UC.
研究领域:
药理学
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免疫学
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胃肠病学
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分子生物学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROANALYSIS
·
2020
·Vol. 32
·期 8
·1772-1779
·
IF 2.544
Yifei Yang,Yue Sun,Mingzhu Jin,Ru Bai,Yutong Liu,Yingqi Wu,Wei Wang,Xuewei Feng,Siyu Li
Superoxide dismutase (SOD) plays an important role in nearly all living cells. In this study, SOD imprinted poly(ionic liquid)s (SIPILs) were prepared on the surface of the bare Au electrode modified with nano-palladium and nano-gold (Au/nPd/nAu/SIPILs). SIPILs was synthesized with 1-vinyl-3-propyl imidazole sulfonate ionic liquids as functional monomers via electrochemically mediated atom transfer radical polymerization (eATRP) catalyzed by SOD. The Au/nPd/nAu/SIPILs was examined by cyclic voltammetry (CV), scanning electron microscope (SEM), energy-dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS). The Au/nPd/nAu/SIPILs was also used as an electrochemical sensor to determine SOD by differential pulse voltammetry (DPV). Under the optimal conditions, the detection range of SOD was from 1.0×10 −8 to 1.0×10 2 mg L −1 with a limit of detection of 8.90×10 −9 mg L −1 (S/N=3). Compared with other methods, the sensor based on SIPILs had the broader linear range and lower detection limit.
研究领域:
分析化学
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材料科学
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电化学
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生物传感器
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产品关联
DOI
高影响因子
TALANTA
·
2015
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IF 3.545
Jie Tang,Xiang Zhu,Xiangheng Niu,Tingting Liu,Hongli Zhao,Minbo Lan
In the present work, a high-performance enzyme-based electrochemical sensor for the detection of superoxide anion radical (O 2 ●− ) is reported. Firstly, we employed a facile approach to synthesize PtPd nanoparticles (PtPd NPs) on chemically reduced graphene oxide (RGO) coated with polydopamine (PDA). The prepared PtPd-PDARGO composite was well characterized by transmission electron microscopy , scanning electron microscopy, Fourier transform infrared spectra , X-ray diffraction, X-ray photoelectron spectroscopy and electrochemical methods. Then the assembled composite was used as a desired electrochemcial interface for superoxide dismutase (SOD) immobilization. Owing to the PDA layer as well as the synergistic effect of PtPd NPs, the fabricated SOD/PtPd-PDARGO sensor exhibited an outstanding sensitivity of 909.7 μA mM −1 cm −2 upon O 2 ●− in a linear range from 0.016 mM to 0.24 mM ( R 2 =0.992), with a low detection limit of 2 μM (S/N=3) and excellent selectivity, good reproducibility as well as favorable long-term stability.
研究领域:
生物化学
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医学检测
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）