Results in Engineering
·
2025
·
IF 7.9
Jiao Yan,Zhenzhen Li,Chengye Yang,Ke Xu,Ying Tang
A novel gel-templated strategy, featuring the unique employment of cationic worm-like micelles as a 3D gel template, was developed to fabricate hierarchically porous MgFe-layered double hydroxide (BTAC-MgFe-LDH) monoliths with ultra-high adsorption capacity toward sulfonated lignite (SL). Specifically, behentrimonium chloride (BTAC) and sodium salicylate self-organize into such cationic worm-like micelles, which serve as a 3D gel scaffold to mediate the co-precipitation of metal ions. After subsequent removal of this gel network, interconnected meso- and macropores (5–80 nm) are formed-these pores boost the specific surface area to 103.93 m² g⁻¹ (over double that of conventional LDH) and the pore volume to 0.63 cm³ g⁻¹ (four times higher than conventional LDH). For the resulting monolithic gel-derived adsorbent, 97.1% SL removal is achieved within 20 min at pH 3 and 25°C; its adsorption follows pseudo-second-order kinetics, with a Langmuir maximum capacity of 64.93 mg g⁻¹ (experimental result: 92.1 mg g⁻¹). Thermodynamic parameters (ΔH = - 21.08 J mol −1 ; ΔS = - 44.61 J mol −1 k −1 ) confirm spontaneous, exothermic adsorption dominated by electrostatic interactions and interlayer anion exchange. The BTAC-MgFe-LDH still retains over 64% of its capacity after five cycles, this result confirms that the gel-based approach provides a scalable, eco-friendly route to fabricate robust monolithic materials, which are effective at removing macromolecular organic pollutants from oilfield wastewater.
研究领域:
环境科学
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材料化学
·
吸附技术
·
废水处理
·
功能材料
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DOI
高影响因子
MICROBIOLOGY
·
2017
·
IF 0.856
Faheem Uddin Rajer,Huijun Wu,Yongli Xie,Shanshan Xie,Waseem Raza,Hafiz Abdul Samad Tahir,Xuewen Gao
Rhizobacterial volatile organic compounds (VOCs) play an important role in the suppression of soil-borne phytopathogens. In this study, the VOCs produced by a soil-isolate,Bacillus subtilisFA26, were evaluatedin vitrofor their antibacterial activity againstClavibacter michiganensisssp.sepedonicus(Cms), the causal agent of bacterial ring rot of potato. The VOCs emitted by FA26 inhibited the growth of Cms significantly compared with the control. Scanning and transmission electron microscopy analyses revealed distorted colony morphology and a wide range of abnormalities in Cms cells exposed to the VOCs of FA26. Varying the inoculation strategy and inoculum size showed that the production and activity of the antibacterial VOCs of FA26 were dependent on the culture conditions. Headspace solid-phase microextraction/gas chromatography–mass spectrometry analyses revealed that FA26 produced 11 VOCs. Four VOCs (benzaldehyde, nonanal, benzothiazole and acetophenone) were associated with the antibacterial activity against Cms. The results suggested that the VOCs produced by FA26 could control the causal agent of bacterial ring rot of potato. This information will increase our understanding of the microbial interactions mediated by VOCs in nature and aid the development of safer strategies for controlling plant disease.
研究领域:
植物病理学
·
微生物学
·
农业科学
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PubMed
高影响因子
Defence Technology
·
2021
·
IF 3.172
Fuwei Li,Yue-ting Wang,Cheng-ai Wang,Yun Shen,Ze-hua Zhang,Jian Cheng,Shuang-zhang Wu,Ying-hua Ye,Rui-qi Shen
The core-shell metastable intermolecular composites (MIC) have attracted much attention in the past few years due to their unique properties. Here, the preparation of Al-Core heterojunction fibers using PVP as a template is proposed. The nano-Al was directly added to the precursor solution of cupric acetate monohydrate (CAM)/Polyvinylpyrrolidone (PVP), and the initial Al@CAM/PVP fibers were obtained via electrospinning. The core-shell MIC fibers are then obtained by calcining the initial fibers. The morphology, structure, and composition of Al-core MIC fibers were characterized, that the energetic fibers calcined at 300 °C, 350 °C, and 400 °C have a core-shell structure with shell compositions Cu x O and PVP, Cu x O and CuO, respectively. The energy release characteristics of Al-core MIC were investigated, and preliminary ignition tests were performed using an ignition temperature measuring instrument and a pulsed laser. The energetic fibers calcined at 300 °C exhibited unique properties. The decomposition of PVP in the shell layer promoted exotherm, and a low-temperature exothermic peak was shown at 372–458 °C. Lower ignition temperatures and higher flame heights were observed in the combustion tests than calcination at 350 °C and 400 °C. An unexpected result was that PVP can play a positive role in Al/CuO nanothermites. Simultaneously, this preparation method provided an idea for the integrated preparation of core-shell Al-Core MIC fibers and tuning the properties of MIC.
研究领域:
材料科学
·
化学工程
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高影响因子
Antibiotics-Basel
·
2026
·Vol. 15
·期 7
·666
·
IF 5.5
Huan Liu,Yiming Liu,Na Yu,Miao An,Yaoxin Tang,Jing Qu,Xiubo Li
Background:Antimicrobial resistance among Gram-positive veterinary pathogens has increased the need for more rational and experimentally grounded strategies to prioritize tylosin derivatives for antibacterial development. This study aimed to develop and externally a calibrated, decision-oriented screening workflow for tylosin-derived antibacterial analog prioritization againstStaphylococcus aureusandStreptococcus agalactiae.Methods:Publicly available minimum inhibitory concentration (MIC) data were used to construct organism-specific multilayer perceptron models. Model performance was evaluated using a five-fold out-of-fold framework. Calibrated activity probabilities were then combined with precision-oriented thresholds and similarity-based applicability-domain constraints to define prospective Go/No-Go decisions. To examine external transferability, six synthesized tylosin derivatives (A1–A6) were prospectively predicted and subsequently tested using in vitro MIC assays.Results:Internal validation showed stronger and more stable performance forS. aureusthan forS. agalactiae. However, closed-loop external validation revealed distinct organism-specific decision behaviors. ForS. aureus, the workflow assigned Go decisions to five compounds and included the only experimentally active analog, A6, but also generated several false Go decisions for inactive analogs. ForS. agalactiae, all six compounds were classified as No-Go under the primary decision rule, whereas MIC testing showed that four analogs were experimentally active, indicating conservative under-selection in a low-data extrapolation setting.Conclusions:Calibrated probabilities and applicability-domain analysis can improve the transparency and diagnostic value of antibacterial prioritization, but they do not guarantee robust external activity prediction when training-set coverage, threshold transferability, or chemical-space representation is limited. Overall, this study provides an early-stage, risk-aware closed-loop decision-support framework for tylosin-derived analog prioritization and highlights the need for iterative model updating, probability recalibration, and larger external validation before such workflows are used as high-confidence prospective screening tools in veterinary antibacterial discovery.
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PubMed
高影响因子
JOURNAL OF ANTIBIOTICS
·
2021
·Vol. 74
·期 9
·574-579
·
IF 2.649
Ge Ying,Kang Peng-Wei,Li Jia-Qi,Gao Han,Zhai Le,Sun Le-Yun,Chen Cheng,Yang Ke-Wu
The superbug infection caused by metallo-β-lactamases (MβLs) carrying drug-resistant bacteria, specifically, New Delhi metallo-β-lactamase (NDM-1) has become an emerging threat. In an effort to develop novel inhibitors of NDM-1, thirteen thiosemicarbazones ( 1a - 1m ) were synthesized and assayed. The obtained molecules specifically inhibited NDM-1, with an IC 50 in the range of 0.88–20.2 µM, and 1a and 1f were found to be the potent inhibitors (IC 50 = 1.79 and 0.88 μM) using cefazolin as substrate. ITC and kinetic assays indicated that 1a irreversibly and non-competitively inhibited NDM-1 in vitro. Importantly, MIC assays revealed that these molecules by themselves can sterilize NDM-producing clinical isolates EC01 and EC08, exhibited 78-312-fold stronger activities than the cefazolin. MIC assays suggest that 1a (16 μg ml −1 ) has synergistic antimicrobial effect with ampicillin, cefazolin and meropenem on E. coli producing NDM-1, resulting in MICs of 4-32-, 4-32-, and 4-8-fold decrease, respectively. These studies indicate that the thiosemicarbazide is a valuable scaffold for the development of inhibitors of NDM-1 and NDM-1 carrying drug-resistant bacteria.
研究领域:
微生物学
·
药理学
·
感染病学
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DOI
PubMed
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Xin Yu,Qinghe Gao,Guoxuan Li,Zhigang Lei,Chao Wang,Li Zhang,Huijuan Qian,Mingliang Zhu,Jin Huang,Conying Lu,Zhichao Zhang
Microbiologically influenced corrosion (MIC) induced by sulfate-reducing bacteria (SRB) severely threatens the service of metal materials, and traditional purely passive barrier coatings fail to withstand the continuous attack of biofilms. Herein, a ternary composite material (LDH-ZIF@CaO₂) composed of CoAl-LDH, ZIF-67, and CaO 2 was synthesized and incorporated into epoxy resin to construct an anti-corrosion coating that integrates active antibacterial and anti-corrosion properties. The study reveals that this composite possesses typical microenvironment responsiveness: in the acidic environment generated by microorganism metabolism, the Co ions released from the system can catalyze H₂O₂ (produced by CaO₂ hydrolysis) to undergo a Fenton-like reaction, generating highly oxidizing hydroxyl radicals (•OH) and singlet oxygen ( 1 O₂). This achieves highly efficient eradication of SRB and biofilm detachment. Electrochemical impedance spectroscopy (EIS) tests indicate that when the CaO₂ loading is 200 mg, the coating exhibits the optimal anti-corrosion performance, maintaining high compactness and high impedance characteristics even after 30 d of immersion, the impedance value is 10 8 Ω cm 2 , which is 2 orders of magnitude higher than that of epoxy resin systems. Furthermore, this paper thoroughly elucidates that the excessive addition of CaO₂ (400 mg) leads to filler agglomeration, internal gas pressure, and oxidative degradation of the resin matrix caused by excessive free radicals, which conversely accelerates coating failure. This study provides a new theoretical basis and strategy for designing microenvironment-responsive, anti-MIC coatings.
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Foods
·
2023
·Vol. 12
·期 2
·392
·
IF 5.2
Yue Peng,Qian Wang,Kaixiang Zhu,Wu Ding
Pseudomonas aeruginosa(P. aeruginosa) is a typical Gram-negative bacterium that can cause the spoilage of catered food products. Using a luminescent reporter gene (luxCDABE), this study sought to construct a cell-based biosensor (PAO1-CE) to rapidly screen antibacterial substances againstP. aeruginosa. A total of six antibiotics belonging to five categories were used as the model test substances. The results of the bioluminescence detection method were verified using traditional antibacterial research assessments. The correlation coefficient of the regression equation fitting the data generated using this method was greater than 0.98, supporting the credibility of this approach. Additionally, the EC50of each of the antibiotics assessed in this study was lower than the 1/2 MIC determined by conventional means. All six of the antibiotics caused varying degrees of damage to the cell membrane and cell wall ofP. aeruginosa. Importantly, this novel method helped shorten the time necessary for active-compound detection and could be used for high-throughput detection, which would also help improve the detection efficiency. The application of this method towards the discovery of novel antibacterial compounds targetingP. aeruginosaholds substantial promise for greatly improving the efficiency of compound discovery.Keywords:luxCDABE;Pseudomonas aeruginosa;bacteriostatic substances;rapid
研究领域:
微生物学
·
生物技术
·
药学
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PubMed
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-8
·
IF 3.9
Wang Yueyuan,Diao Zhipeng,Qu Yuchen,Fan Kai,Feng Chen,Lv Bo,Yu Yunli,Geng Zhou
Omadacycline, a third-generation tetracycline antibiotic, exhibits time-dependent pharmacokinetics. The ratio of the 24-hour area under the concentration-time curve to minimum inhibitory concentration (AUC 0−24 /MIC) serves as the primary pharmacokinetic/pharmacodynamic (PK/PD) index for omadacycline, demonstrating strong correlation with therapeutic efficacy, particularly in critically ill patient populations. To facilitate routine therapeutic drug monitoring (TDM) in clinical practice, a high-performance liquid chromatography - tandem mass spectrometry (HPLC-MS/MS) method was developed for quantification of omadacycline in human plasma. An Agilent 1260 series liquid chromatograph and an API 4000 triple tandem quadrupole mass spectrometer were used for the determination of omadacycline and endocannabinoids. The separation was performed on a Phenomenex KINETEX XB-C18 column (2.6 μm, 3 × 50 mm) with 0.1% formic acid-water and pure acetonitrile as the mobile phases. The LC-MS/MS separation was carried out using a gradient elution procedure at a flow rate of 0.4 mL/ min, and the total run time was 5 min. An electrospray ionization (ESI) was selected, and the detection ions of omadacycline and the internal standard (fexofenadine-d6) were determined by mass spectrometry scanning with multiple reaction monitoring (MRM) in positive ion mode as follows: m/z 557.4→453.4 and m/z 508.4→472.8, respectively. The established linear range (20-2000 ng/mL) effectively covers the plasma concentration range encountered in > 98% of clinical samples, making it suitable for routine therapeutic drug monitoring. The method demonstrated acceptable selectivity, recovery, and matrix effect. The results of intra-day precision and inter-day precision show that the relative standard deviation (RSD) is less than 10%, while the relative error (RE) is within ± 10.00%. In this study, we developed and validated a simple, sensitive and accurate method to quantify the concentration of omadacycline in human plasma using LC-MS/MS. This offers essential technical support for the rational clinical application of omadacycline.
研究领域:
药理学
·
分析化学
·
临床药理学
·
质谱分析
·
治疗药物监测
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DOI
PubMed
高影响因子
ChemMedChem
·
2017
·Vol. 12
·期 4
·319-326
·
IF 3.225
Tingjunhong Ni,Ran Li,Fei Xie,Jing Zhao,Xin Huang,Maomao An,Chengxu Zang,Zhan Cai,Dazhi Zhang,Yuanying Jiang
Graphical Infections unanchored ! A series of novel 2-aminonicotinamide derivatives were designed, synthesized, and evaluated for in vitro antifungal activity. Compounds 11 g and 11 h have excellent activity against Candida albicans , with MIC 80 values of 0.0313 μg mL −1 , and exhibit broad-spectrum antifungal activity against fluconazole-resistant C. albicans , C. parapsilosis , C. glabrata , and Cryptococcus neoformans , with a MIC 80 range of 0.0313–2.0 μg mL −1 . Further investigation suggested that compound 11 g targets the cell wall and decreases glycosylphosphatidylinositol anchor content on the cell surface of C. albicans . Based on the structures of the reported compounds G884 [ N -(3-(pentan-2-yloxy)phenyl)nicotinamide], E1210 [3-(3-(4-((pyridin-2-yloxy)methyl)benzyl)isoxazol-5-yl)pyridin-2-amine], and 10 b [2-amino- N -((5-(3-fluorophenoxy)thiophen-2-yl)methyl)nicotinamide], which inhibit the biosynthesis of glycosylphosphatidylinositol (GPI)-anchored proteins in fungi, a series of novel 2-aminonicotinamide derivatives were designed, synthesized, and evaluated for in vitro antifungal activity. Most of these compounds were found to exhibit potent in vitro antifungal activity against Candida albicans , with MIC 80 values ranging from 0.0313 to 4.0 μg mL −1 . In particular, compounds 11 g [2-amino- N -((5-(((2-fluorophenyl)amino)methyl)thiophen-2-yl)methyl)nicotinamide] and 11 h [2-amino- N -((5-(((3-fluorophenyl)amino)methyl)thiophen-2-yl)methyl)nicotinamide] displayed excellent activity against C. albicans , with MIC 80 values of 0.0313 μg mL −1 , and exhibited broad-spectrum antifungal activity against fluconazole-resistant C. albicans , C. parapsilosis , C. glabrata , and Cryptococcus neoformans , with a MIC 80 range of 0.0313–2.0 μg mL −1 . Further studies by electron microscopy and laser confocal microscopy indicated that compound 11 g targets the cell wall and decreases GPI anchor content on the cell surface of C. albicans .
研究领域:
药理学
·
微生物学
·
化学
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DOI
PubMed
高影响因子
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
·
2025
·
IF 1.6
Liu Jing-Long,Ye Xiao-Dan,Chen Lu-Si,Jia Ai-Quan,Zhang Qian-Feng
New ten tetrakis(benzoxazine) calix[4]resorcinarenes modified by organic amine through Mannich reaction were obtained in this paper. Compounds 2 ~ 11 were characterized by infrared spectroscopies, nuclear magnetic resonance spectroscopies. The structure of compounds 2 , 10 and 11 was characterized by single crystal X-ray diffraction. Compound 7 possesses a MIC value of 3.13 μg/mL against S. Aureus , demonstrating a favorable inhibitory effect, and a MIC value of 6.25 μg/mL against E. Coli , likewise showing a good inhibitory effect. The UV and 1 H NMR titration experiments were conducted to explore the host–guest chemistry between compound 10 and acetonitrile molecules, indicating that compound 10 exhibited encapsulation behavior towards acetonitrile molecules through hydrogen bonding interactions. Then Hirshfeld surface analysis showed that H⋅⋅⋅H, C − H⋅⋅⋅O, C − H⋅⋅⋅π, O − H⋅⋅⋅O played an important role in the crystal accumulation of compounds 2 , 10 and 11 .
研究领域:
有机化学
·
生物学
·
药物化学
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高影响因子
JOURNAL OF FOOD SAFETY
·
2023
·
IF 2.4
Shengjie Li,Feng Cheng,Xueqin Cao,Bakri Mahinur,Maitinuer Maiwulanjiang
As the interest in “natural” and “safe” products grows, the use of natural products instead of synthetic preservatives to combat food spoilage and poisoning caused by microorganisms during processing and storage has become a prioritized option. The present research evaluated the antibacterial activity of the Mentha longifolia L. essential oil (MLEO) against several pathogenic bacteria, and the mechanism of action against methicillin-resistant Staphylococcus aureus (MRSA). Gas Chromatography Quadrupole Time-of-Flight Mass Spectrometry (GC-Q-TOF MS) analysis suggested that main components of MLEO were carvone (47.39%) and limonene (12.48%). The oil showed considerable antibacterial activity with MIC values of 0.394–1.576 mg/mL, and could be a promising bactericide. Non-targeted metabolomics analysis based on GC-Q-TOF MS identified 66 different metabolites, and Kyoto Encyclopedia of Genes and Genomes enrichment analysis of these metabolites revealed that MLEO achieves the effects by affecting amino acid metabolism in MRSA.
研究领域:
微生物学
·
药理学
·
食品科学
·
分析化学
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产品关联
DOI
高影响因子
Letters in Drug Design & Discovery
·
2019
·Vol. 16
·期 9
·1020-1030
·
IF 0.953
Liang Zhaochang,Huang Yuping,Wang Shiben,Deng Xianqing
Background: Several series of pyrazole derivatives containing (thio) semicarbazide (4a-4h, 5a-5l, 6a-6f, 7a-7c) were designed and synthesized to screen dual inflammatory and antimicrobial activities. Methods: The products were characterized by1H NMR, 13C NMR and HRMS. In vitro
LPS-induced TNF-α model and in vivo xylene-induced ear-edema model were used to evaluate their antiinflammatory activity. Their in vitro antimicrobial activities were evaluated using a serial dilution method against several gram-positive strains, gram-negative strains and a fungi strain.
Results: Bioassays indicated that most of the compounds markedly inhibited the expression of TNF- α at the concentration of 20 μg/mL Compounds 5i, 6b, and 7b had comparable in vivo antiinflammatory activity to the reference drug dexamethasone at the dose of 50 mg/kg. In addition,
several compounds showed antimicrobial activity against different strains, and compounds 5g and 5h exhibited potent inhibitory activities with the MIC value of 8 μg/mL against the Streptococcus pneumoniae CMCC 31968 and Staphylococcus aureus CMCC 25923, respectively. Compound 7b, which
exhibited both anti-inflammatory and antimicrobial activities, should be studied as it is or after derivatization. Conclusion: It can be concluded that pyrazoles, with (thio)-semicarbazone moieties, have the potential to be developed into new anti-inflammatory agents.
研究领域:
药理学
·
药物化学
·
传染病学
·
炎症研究
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DOI
高影响因子
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