MICROPOROUS AND MESOPOROUS MATERIALS
·
2022
·
IF 5.876
Dan Yang,Xi nan Yang,Ming Liu,Li xia Chen,Qing Li,Hang Cong,Zhu Tao,Xin Xiao
Organic micropollutants pose a tremendous challenge to global water resources, for nonbiodegradable synthetic chemicals, especially. In this investigation, we loaded Cucurbit [5]uril on polymer BPEIH to prepare supramolecular polymer Q[5]@BPEIH with pore structure , which is used to adsorb and remove organic micropollutants in water. The experimental results show that the adsorbent can remove organic micropollutants from water quickly and with high loading, which is better effect than that of traditional activated carbon. In particular, the polymer is an excellent adsorbent for 2,7-dihydroxynaphthalene and Neutral Red pollutants. It also has classy adsorption properties for 1-naphthylamine, Amaranth, Metallic Yellow, 8-hydroxy-1,3,6-trisulfonic acid pyrene, Methyl Orange and Crystal Violet. This adsorbent can also adsorb I 2 . When the adsorption tends to equilibrium, the calculated adsorption rate is 87.2%. These outstanding adsorption effects show that this adsorbent can help to remove a variety of micropollutants in the process of wastewater treatment . More importantly, Q[5]@BPEIH that we designed and synthesized has the characteristics of low synthesis cost, simple synthesis and preparation process, high product yield, fast adsorption speed and strong removal ability. The admirable removal ability of pollutant proved the prospect of Q [5]@BPEIH for rapid sewage disposal.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
Current Research in Microbial Sciences
·
2025
·
IF 5.8
Zhi Wu,Yina Shao,Shanshan Zhang,Chenghua Li
Vibrio splendidus AJ01 is the primary pathogen of Apostichopus japonicus , resulting in huge economic losses. In the present study, we found that 5-iodoindole exhibits a remarkable protective effect on A. japonicus , the survival rate of which can be improved to 93.75%. To explore the impact of 5-iodoindole on V. splendidus AJ01, bacterial growth and virulence factors were determined. Results showed that 5-iodoindole significantly decreased swimming motility, hemolytic activity and protease activity but had minimal effect on the overall growth of the bacterium. Furthermore, a differentially expressed protein was downregulated and identified as elongation factor thermo unstable protein (EF-Tu) via SDS-PAGE combined with LC-MS/MS. Moreover, 5-iodoindole had impact on a large number of genes at RNA level, such as genes related to two-component system, ABC transporters, flagella, and chemotaxis. In addition, 20 µM 5-iodoindole could upregulated the mRNA level of immune related genes in A. japonicus , including IL-17, VEGF and MMP1. Our results indicated 5-iodoindole protect A. japonicus through a two-pronged approach: not only inhibiting bacterial virulence but also enhancing the host's immunity. This not only addresses the limitations of traditional indole but also provides a green alternative to antibiotics for protecting A. japonicus from infections caused by V. splendidus AJ01.
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 18
·10188
·
IF 4.9
Peng Zhao,Zifu Wang,Shimei Liao,Yangxin Liao,Shijun Hu,Jianchun Qin,Donghua Zhang,Xiaohui Yan
Salvia leucanthais a perennial herb of the genusSalviain the family Labiatae, which has a wide range of biological activities, mainly including inhibition of acetylcholinesterase, antibacterial, and anti-inflammatory activity. To explore the protective effects and mechanism of action ofS. leucanthaon Alzheimer’s disease (AD), the anti-AD activity of SLE (extracts ofS. leucantha) was determined by using a transgenicCaenorhabditis elegans(C. elegans) model (CL4176). Analyses included paralysis assay, phenotypic experiments, transcriptome sequencing, RNA interference (RNAi), heat shock assays, and gas chromatography-mass spectrometry (GC-MS). SLPE (S. leucanthapetroleum ether extract) could significantly delay CL4176 paralysis and extend the longevity ofC. elegansN2 without harmful effects. A total of 927 genes were significantly changed by SLPE treatment inC. elegans,mainly involving longevity regulatory pathways—nematodes, drug metabolism—cytochrome P450, and glutathione metabolic pathways. RNAi showed that SLPE exerted its anti-AD activity through up-regulation of the genegst-5; the most abundant compound in SLPE analyzed by GC-MS was 2,4-Di-tert-butylphenol (2,4-DTBP), and the compound delayed nematode paralysis. The present study suggests that active components inS. leucanthamay serve as new-type anti-AD candidates and provide some insights into their biological functions.
研究领域:
药理学
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神经科学
·
分子生物学
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 11
·797
·
IF 4.3
Mingbo Guo,Yijun Wang,Lei Zhang,Junran Lu,Chang Gong,Wanning Zhang,Yuxi Fang,Xinyuan Zhu,Shunai Che
Size restrictions pose increasing challenges to the acoustic performance of microspeakers in portable devices as the size of such devices, and thus the back volume of microspeakers, continues to shrink. Filling the back volume with porous materials, such as zeolites, has been proved to be an effective strategy for improving acoustic performance. In this work, hierarchically structured ZSM-5 zeolites with abundant mesopores were synthesized via the traditional hydrothermal method by adjusting the SiO2/Al2O3ratios (SAR), and their pore structures and morphologies were systematically investigated. Their acoustic enhancement performance was evaluated using a commercial microspeaker. Based on their acoustic properties, the influence of pore structure on acoustic performance was further studied. The ZSM-5 zeolite sample with an SAR of 614, which exhibited the maximum mesopore volume, demonstrated exceptional acoustic enhancement performance with a resonance offset of 199.53 Hz and an enhanced sound pressure level of 4.74 dB at 500 Hz. The presence of mesopores significantly facilitates diffusion within the zeolite crystals, enabling air molecules to access more micropores for efficient sorption–desorption processes during diaphragm vibration in microspeakers. Furthermore, supermicropores were found to contribute to improved performance by adsorbing air molecules during diaphragm vibration, complementing the role of micropores.
研究领域:
材料科学
·
声学工程
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2024
·
IF 3.7
Min Zhou,Liyuan Wei,Chongzhi Wu,Wei Chen,Zhengju Tang
Cytidine 5′-monophosphate (CMP) was widely applied in the food and pharmaceutical industries. Currently, CMP is mainly produced by enzyme catalysis. However, the starting materials for enzyme catalysis were relatively expensive. Therefore, seeking a low-cost production process for CMP was attractive. In this study, Escherichia coli (E. coli) was systematically modified to produce CMP. First, a the cytidine-producing strain was constructed by deleting cdd, rihA, rihB, and rihC. Second, the genes involved in the pyrimidine precursor competing pathway and negative regulation were deleted to increase cyti dine biosynthesis. Third, the deletion of the genes that caused the loss of CMP phosphatase activity led to the accumulation of CMP, and the overexpression of the rate-limiting step genes and feedback inhibition resistance genes greatly increased the yield of CMP. The yield of CMP was further increased to 1013.6 mg/L by blocking CMP phosphorylation. Ultimately, the yield of CMP reached 15.3 g/L in a 50 L bioreactor. Overall, the engineered E. coli with a high yield of CMP was successfully constructed and showed the potential for industrial production.
研究领域:
生物技术
·
微生物学
·
代谢工程
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DOI
PubMed
高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2024
·Vol. 39
·期 2
·332-336
·
IF 1.3
Ma Kuoyan,Zhao Pengxian,Yi Hongyu,Yu Haijun,Zhou Moxi,Zhang Lingling,Liu Yupu
A core-shell composite consisting of ZSM-5 zeolite as the core and ordered mesoporous silica as the shell was prepared by a surfactant-controlled sol-gel process and using tetradecylamine (TDA) as the template and Tetraethylorthosilicate (TEOS) as the silica precursor. The pores of the silica shell were found to be ordered and perpendicular to the crystal faces of the zeolite core. The thickness of the shell in the core-shell structured composite can be adjusted in the range of 20–90 nm, while the surface morphology and the pore size distribution were modified by changing the mass ratio of TEOS to zeolite. The composite molecular sieves have higher surface area for capturing molecules than ZSM-5, and with the increase of mesoporous shell layer, the ZSM-5@SiO 2 - x composites show stronger adsorption capacity of butyraldehyde. However, when the shell thickness exceeds 90 nm, the adsorption capacity of butyraldehyde decreases instead. The composites have a huge potential for environmental applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMIE INGENIEUR TECHNIK
·
2017
·Vol. 89
·期 10
·1333-1342
·
IF 0.877
Guanghua Ye,Zhongyuan Guo,Yuanyuan Sun,Kake Zhu,Honglai Liu,Xinggui Zhou,Marc-Olivier Coppens
The nature of external surface barriers in the zeolite ZSM-5 was explored by comparing mass transfer of n -heptane in samples with different crystal sizes, surface structure, and composition. These different surface properties were achieved by HF acid etching and SiO 2 deposition on an as-synthesized ZSM-5 crystal sample. HF etching does not reduce surface barriers. SiO 2 deposition on the same sample reduces surface barriers significantly. These insights into the nature of surface barriers could be used to guide the rational design of zeolitic materials with better mass transport properties.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2018
·
IF 5.123
Xiaoping Tan,Genfu Zhao,Xu Zhou,Taohong Li,Hong Lei,Guanben Du,Long Yang
The rational design of electrochemical methods for isomer recognition is a focus of research in the molecular recognition and separation fields. In this work, a novel, rapid, and convenient electrochemical approach for recognition of nitrophenol isomers was constructed based on the alternating layer-by-layer (LbL) assembly of water-soluble cationic and anionic pillar [5]arene on a carboxylic graphene (C-Gra) modified glass carbon electrode. The electrochemical recognition of nitrophenol isomers was investigated by differential pulse voltammetry (DPV). The electrochemical results reveal that both the peak currents of m -nitrophenol ( m -NP) and p -nitrophenol ( p -NP) increased with the increasing of the layer number of the assembled pillar [5]arene, whereas the peak current of o -nitrophenol ( o -NP) decreased with the increased layers, which demonstrated an efficient route for discriminating the nitrophenol isomers. The molecular recognition mechanism was studied by 1 H NMR spectra, which indicated that the m -NP and p -NP can be included in the cavity of the pillar [5]arene host. However, the o -NP could not enter into the host of pillar [5]arene, which was ascribed to the formation of intramolecular hydrogen bond of o -NP. The LbL assembly modified GCE was used for detecting p -NP and m -NP. A low detection limit of 0.33 μM (S/N = 3) and a linear response range of 1–90 μM for p -NP were obtained by using this method. And the detection limit of 0.16 μM (S/N = 3) and a linear response range of 0.5–70 μM for m -NP were obtained. This method of LbL assembly modified GCE has potential application in molecular recognition and separation.
研究领域:
分析化学
·
分子识别与分离
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DOI
高影响因子
TETRAHEDRON
·
2020
·
IF 2.233
Xianxia Tu,Haiyun Peng,Guisheng Deng
In Ph 3 PAuCl/AgOTf/TsOH system, 2-diazo-5-alkynyl-1,7-diketo carbonyl compounds were transformed into diazo furans . Rh 2 (OAc) 4 -mediated conversion of the diazo furan derivatives into 4 H -cyclopenta[ c ]furan-5(6 H )-one derivatives was accomplished via C(sp 2 )−H insertion reaction at 4-position on the furan ring.
研究领域:
有机化学
·
合成化学
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DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 33
·期 6
·1837-1845
·
IF 1.408
Liu Dongjing,Zhou Weiguo,Wu Jiang
Performance of CeO 2 -La 2 O 3 /ZSM-5 sorbents for sulfur removal was examined at temperature ranging from 500 oC to 700 oC. The sulfur capacity of 5Ce5La/ZSM-5 was much bigger than that of CeO 2 /ZSM-5. H 2 had a negative impact on the sulfidation; however, CO had little influence on sulfur removal. The characterization results showed that CeO 2 and La 2 O 3 were well dispersed on ZSM-5 because of the intimate admixing of La 2 O 3 and CeO 2 , the major sulfidation products were Ce 2 O 2 S and La 2 O 2 S, the XRD and SEM results revealed that ZSM-5 structure could remain intact during preparation and sulfidation process, the H 2 -TPR showed that the reducibility of CeO 2 can be remarkably enhanced by addition of La.
研究领域:
材料科学
·
环境化学
·
催化化学
·
能源工程
·
无机功能材料
·
气体净化
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DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2024
·Vol. 221
·期 12
·2300874
·
IF 1.9
Jie Yang,Zhengkun Cai,Dong Li
In this experiment, ZSM-5 molecular sieves are prepared by hydrothermal synthesis and modified by impregnation with Fe, La, and Ce loading. X-ray diffraction, X-ray photon-electron spectroscopy, and scanning electron microscopy show that Fe, La, and Ce elements are successfully loaded onto the surface of the material, and the surface area of Fe-La-Ce-ZSM-5 is 241.66 m 2 g −1 . A systematic study on the adsorption of Congo red solution is carried out using Fe-La-Ce-ZSM-5 molecular sieves and it is found through the adsorption data that the adsorption process is more in line with Langmuir and the proposed second-order kinetic model, and the theoretical saturated adsorption capacity is 2669.19 mg g −1 . The adsorption process is recycled four times and still has more than 60 % removal performance for high-concentration Congo red solution. The results of this experiment show that Fe-La-Ce-ZSM-5 molecular sieves show excellent removal performance for Congo red dye in wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
CATALYSIS LETTERS
·
2019
·Vol. 149
·期 8
·2078-2088
·
IF 2.372
He Xiaoxia,Chen Yu,Liu Ya,Fang Lina,Chen Zeng,Ji Hongbing
Abstract A series of metal-modified hierarchical M/H-ZSM-5 catalysts were prepared for catalytic conversion of cellulose in an aqueous medium. Characterization of the catalysts showed that the impregnation of metal into H-ZSM-5 did not change the basic framework and pore structure of H-ZSM-5, but it decreased the total acidity. Analysis of the products indicated that the catalysts significantly affected products distribution. When Co/H-ZSM-5 and Fe/H-ZSM-5 were used as the catalysts, the yields of lactic acid and cyclic ketones obviously increased. At last, a recommendable catalytic transformation pathway of cellulose over M/H-ZSM-5 was proposed on the basis of the obtained experimental results and the published literatures. Graphical Abstract In this paper, a series of metal-modified hierarchical M/H-ZSM-5 (M = Ce, Co, Ga, and Fe) catalysts were prepared and employed in catalytic conversion of cellulose in aqueous media to examined the products distribution of cellulose catalytic conversion. Based on our results and previous works, the plausible general reaction pathways of cellulose over M/H-ZSM-5 were proposed.
研究领域:
化学工程
·
催化材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）