CATALYSIS LETTERS
·
2022
·Vol. 152
·期 12
·3537-3547
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IF 2.936
Liu Zonghui,Zhang Zhongze,Wen Zhe,Xue Bing
Development of simple and high performance solid catalysts for the utilization of biomass has become an important research topic in heterogeneous catalysis and sustainable chemistry. Herein, a highly efficient catalytic system was studied for the catalytic transfer hydrogenation of furfural to high value furfuryl alcohol over a series of acidic or basic oxides catalysts. Among those oxides, acidic Al 2 O 3 is identified as the most effective for FAL production, giving a FUR conversion as high as 40% (FUR consumption rate was 186 mmol g cat −1 h −1 ) and FAL selectivity of 99% after only 5 min at 150 °C using 2-propanol as the H-donor and solvent. Furthermore, the as prepared Al 2 O 3 give an Ea value of 15.2 kJ/mol, which is much lower than other complex catalysts in the literatures. Correlating the catalyst performance with its physical and chemical properties uncovers that the large specific surface area and high acidity of Al 2 O 3 would be the key to the catalyst performance. Graphical Abstract
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CURRENT MICROBIOLOGY
·
2022
·Vol. 79
·期 6
·1-11
·
IF 2.343
Bao Jingjiao,Guo Dengkang,Jin Lei,Li Tiejun,Shi Hui
Vibrio fluvialis is a marine opportunistic pathogen that frequently causes diseases in aquatic animals and humans. V. fluvialis can produce quorum sensing signaling molecules to coordinate cell density-dependent behavioral changes, including N-acyl homoserine lactone (AHL), which acts as a vital mediator of virulence-associated gene expression. Currently, several AHL molecules in V. fluvialis have been detected via biological and physicochemical methods, although different detection approaches have generated diverse AHL profiles. Here, we describe the AHL-producing bacterium, V. fluvialis BJ-1, which was isolated from marine sediments from the East China Sea. V. fluvialis BJ-1 could stimulate AHL-mediated β-galactosidase synthesis of the biosensor Agrobacterium tumefaciens NTL4 (pZLR4) but could not induce violacein production in the AHL reporter strain, Chromobacterium violaceum CV026. This bacterial isolate exhibited strong AHL-producing activity at low cell density; however, the AHL activity declined when population density remained at high levels. Analysis of the AHLs by Ultra-High-Performance Liquid Chromatography tandem Mass Spectrometry demonstrated that V. fluvialis BJ-1 produced five different AHL signaling molecules, including two linear chain AHL products (C 8 - and C 10 -HSL), and three β-carbon-oxidative AHL products (3-O-C 8 -, 3-O-C 10 - and 3-O-C 12 -HSL). Significantly, the present study is the first to accurately define the AHL profile of marine V. fluvialis . In future, the coupling of UHPLC to ESI–MS/MS is expected to be utilized for the accurate determination of AHL profiles in marine Vibrio .
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 5
·1-10
·
IF 6.408
Ding Jinglei,Zhang Wenqi,Xue Fengying,Sun Yu,Yan Quizhu,Chen Yanwei,Shan Guiye
Gold nanoclusters (AuNCs) are widely used in the fluorescence detection of biomolecules in human serum due to their good fluorescence properties, low toxicity, and better biocompatibility. However, the weak fluorescence intensity of AuNCs limits the fluorescence detection of molecules within a wide concentration range. It is reported that coating AuNCs in ZIF-8 with adjustable pore size can effectively improve the fluorescence intensity of AuNCs and broaden the detection range. And the AuNCs wrapped in the gaps of ZIF-8 can prevent the fluorescence quenching caused by the aggregation of AuNCs. However, ZIF-8 has high crystallinity, poor dispersion, and easy deposition, which reduces the fluorescence stability of the detection system and affects the detection. Based on the above research, the highly hydrophilic polymer PEI was modified to the surface of ZIF-8, and a kind of nanocomposite material AuNCs/ChOx@ZIF-8/PEI was obtained by co-encapsulating AuNCs prepared with glutathione as a ligand and cholesterol oxidase (ChOx) into ZIF-8 modified with PEI. The composite material emits strong red light at 650 nm under the excitation of 395-nm light, and the system can sensitively detect cholesterol (Chol) in human serum. Compared with other materials, the PEI-modified composite has better solubility and stability, so the detection effect of Chol is better. Encapsulation of ChOx in the ZIF-8 shell can protect the enzyme and increase the local concentration of ChOx, thereby speeding up the reaction rate. Compared with free AuNCs/ChOx, the quenching rate of AuNCs/ChOx@ZIF-8/PEI system is doubled. Secondly, the addition of Fe 2+ to the detection process results in higher quenching rate and detection sensitivity. The system can detect Chol in the concentration range 0.1–2.4 μM, with a detection limit of 0.073 μM. The determination is a fast and sensitive strategy. In addition, the practicability of this assay in the detection of Chol in human serum has been verified. Due to its selectivity and sensitivity, it has potential application value in clinical diagnosis. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 12
·6629-6639
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IF 4.682
Lin Jiaxin,Lu Huan,Duan Yingchun,Yu Chenhong,Li Li,Ding Ya-ping
The detection method with potential ability to diagnose drugs in human serum rapidly, highly sensitivity and selectivity is of vital importance for clinical diagnosis. In this paper, an electrochemical sensor on the basis of composite material modified by zeolitic imidazolate framework (ZIF) on carbon nanofiber (CNF) surface is constructed, which is used for ultra-sensitive determination of adrenaline (AD). CoMnZIF-CNF combines the good conductivity of carbon nanofibers and the high electrocatalysis of CoMnZIF, which can improve the reaction activity and the sensing effect of adrenaline. The proposed sensor shows a good linear relationship between AD concentration from 5 to 1000 μM, and the detection limit is 0.22 μM. Meanwhile, CoMnZIF-CNF demonstrated the remarkable selectivity, significant repeatability and stability, as well as excellent reproducibility. Besides, through the analysis of AD in serum electrolyte, the practicability of the sensor was evaluated and the recovery rate was between 97.51 and 102.53%. On the basis of the results, the prepared sensor has a vital application prospect in detecting AD in actual sample analysis.
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CATALYSIS LETTERS
·
2022
·Vol. 153
·期 1
·248-259
·
IF 2.936
Liu Yi,Chen Ying,Zhi Yunfei,Yu Xiaojian,Wang Pengfei,Wang Shouhong,Shan Shaoyun
In this work, by loading a chromium Salen complex on amino-functionalized cellulose (AFC-SalenCr), a novel and efficient heterogeneous catalyst was successfully synthesized, and used for the copolymerization of sulfur dioxide (SO 2 ) with cyclohexene oxide for the first time. The catalysts were characterized by FTIR, XPS, ICP-MS and TGA for their physiochemical and thermal properties. The as-prepared AFC-SalenCr showed high catalytic activity for the copolymerization. Under optimal reaction conditions, the molecular weight of the resultant copolymer could reach 40,100 g/mol. Moreover, the catalyst was able to recover facilely and be reused for four cycles without any significant activity loss. In addition, the thermal degradation kinetics of the synthesized copolymer was further studied using Kissinger and Flynn–Wall–Ozawa methods for the first time, which indicated that the activation energy of the thermal degradation was 92.8 kJ/mol and 94.0 kJ/mol, respectively. Graphical Abstract
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-14
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IF 9.429
Deng Bo,Ma Bing,Ma Yingying,Cao Pei,Leng Xigang,Huang Pengyu,Zhao Yuanyuan,Ji Tianjiao,Lu Xueguang,Liu Lanxia
Chemotherapeutics that can trigger immunogenic cell death (ICD) and release tumor-specific antigens are effective on treating a variety of cancers. The codelivery of chemotherapeutics with adjuvants is a promising strategy to achieve synergistic therapeutic effect. However, low drug loading and complicated preparation of current delivery systems lead to carrier-associated toxicity and immunogenicity. Herein, we developed a facile approach to construct liposomal spherical nucleic acids (SNA) by the self-assembly of 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE)-doxorubicin conjugate and DOPE-matrix metalloproteinases-9 (MMP-9) responsive peptide-CpG conjugate (DOPE-MMP-CpG). Liposomal SNAs efficiently co-delivered DOX and CpG into tumors and released the two drugs upon biological stimuli of MMP-9 enzyme in tumor microenvironment (TME) and high concentration of endogenous glutathione in tumor cells. We demonstrated that liposomal SNA enhanced activation of dendritic cells (DCs), promoted expansion of CD8 + and CD4 + T cells in both tumors and spleen, inhibited tumor growth, and extended animal survival. This work provided a simple strategy of delivering chemotherapeutics and adjuvants to tumors with synergistic therapeutic effect and reduced side effect. Graphical Abstract
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高影响因子
PHARMACEUTICAL RESEARCH
·
2022
·Vol. 39
·期 6
·1165-1180
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IF 4.58
Chen Yingxian,Zhao Qian,Han Junhua,Lan Xinmiao,Che Jing,Chen Meiwan,Liang Xing-Jie,Ma Xiaowei
Purpose Methicillin-resistant Staphylococcus aureus (MRSA) infection at impaired wound is associated with high risks of developing to persistent bacterial infections since bacterial biofilm is easy to form in MRSA infected wounds. An advanced therapeutic approach to effectively penetrate and eliminate bacterial biofilm and to accelerate cell proliferation and migration at the wound is crucial. Methods The poly(ε-caprolactone)-monomethoxyl poly (ethylene glycol) (PCL-mPEG) micelles loaded with Quercetin and Rifampicin (QRMs) were prepared. Bacterial biofilm proliferation and elimination effect of QRMs were evaluated with confocal laser scanning microscopy. Antibacterial assay was further performed to detect antibacterial activity and mechanism. The cell scratch assay and cellular uptake were performed in HaCaT skin epithelial cells. Results Our results showed that the small sized QRMs could penetrate the interior of MRSA biofilm to disperse and eradicate biofilm. Then, antibiotics are released and accumulated in the acidic biofilm environment. QRMs could kill bacteria through increasing bacterial membrane permeability and altering membrane potential and membrane fluidity. Moreover, QRMs improved intracellular and cytoplasmic delivery efficiency of drugs to epithelial cells, and in the scratch test, presented a stronger ability to promote migration and proliferation of HaCaT cells compared with free drugs. Hemolysis test further proved good biocompatibility of QRMs. Conclusions QRMs could potentially be used as a novel dual-functional nanotherapeutic for anti-bacterial infection by eradicating biofilm and accelerating cells proliferation at MRSA infected wound.
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Journal of Animal Science and Biotechnology
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2022
·Vol. 13
·期 1
·1-13
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IF 6.175
Zhou Xiaoge,Mo Zhaoyi,Li Yankun,Huang Liang,Yu Sihai,Ge Lan,Hu Yamei,Shi Shengjie,Zhang Lutong,Wang Liguang,Gao Lei,Yang Gongshe,Chu Guiyan
Background Oleic acid is an abundant free fatty acid present in livestock that are in a negative energy-balance state, and it may have detrimental effects on female reproduction and fertility. Oleic acid induces lipid accumulation in bovine granulosa cells, which leads to a foam cell-like morphology and reduced steroidogenesis. However, why oleic acid increases lipid accumulation but decreases steroidogenesis remains unclear. This study focused on oleic acid’s effects on lipid type and steroidogenesis. Results Oleic acid increased the lipid accumulation in a concentration-dependent manner and mainly increased the triglyceride level and decreased the cholesterol ester level. Oleic acid also led to a decline in estradiol and progesterone production in porcine granulosa cells in vitro. In addition, oleic acid up-regulated the expression of CD36 and diacylglycerol acyltransferase 2, but down-regulated the expression of 3-hydroxy-3-methylglutaryl-coenzyme A reductase, scavenger receptor class B member 1 and acetyl-Coenzyme A acetyltransferase 2, as well as steroidogenesis-related genes, including cytochrome P450 family 11 subfamily A member 1, cytochrome P450 family 19 subfamily A member 1 and 3 as well as steroidogenic acute regulatory protein at the mRNA and protein levels. An oleic acid-rich diet also enhanced the triglyceride levels and reduced the cholesterol levels in ovarian tissues of female mice, which resulted in lower estradiol levels than in control-fed mice. Compared with the control, decreases in estrus days and the numbers of antral follicles and corpora lutea, as well as an increase in the numbers of the atretic follicles, were found in the oleic acid-fed female mice. Conclusions Oleic acid changed the lipid type stored in lipid droplets of ovarian granulosa cells, and led to a decrease in steroidogenesis. These results improve our understanding of fertility decline in livestock that are in a negative energy-balance state.
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Microsystems & Nanoengineering
·
2022
·Vol. 8
·期 1
·1-9
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IF 8.006
Chang Tianrui,Li Hu,Zhang Nianrong,Jiang Xinran,Yu Xinge,Yang Qingde,Jin Zhiyuan,Meng Hua,Chang Lingqian
This article reports a highly integrated watch for noninvasive continual blood glucose monitoring. The watch employs a Nafion-coated flexible electrochemical sensor patch fixed on the watchband to obtain interstitial fluid (ISF) transdermally at the wrist. This reverse iontophoresis-based extraction method eliminates the pain and inconvenience that traditional fingerstick blood tests pose in diabetic patients’ lives, making continual blood glucose monitoring practical and easy. All electronic modules, including a rechargeable power source and other modules for signal processing and wireless transmission, are integrated onto a watch face-sized printed circuit board (PCB), enabling comfortable wearing of this continual glucose monitor. Real-time blood glucose levels are displayed on the LED screen of the watch and can also be checked with the smartphone user interface. With 23 volunteers, the watch demonstrated 84.34% clinical accuracy in the Clarke error grid analysis (zones A + B). In the near future, commercial products could be developed based on this lab-made prototype to provide the public with noninvasive continual glucose monitoring.
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JOURNAL OF MATERIALS RESEARCH
·
2022
·Vol. 37
·期 5
·1070-1082
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IF 2.909
Wang Bo-Yuan,Li En-Di,Zong Yi-Chao,Wang Xiao-Bo,Yuan Jun,Zhang Fu-Qing
A well-defined structure is greatly helpful to enhance the performance of photocatalysis. Herein, we plan to fabricate multi-shell CeO 2 photocatalyst with hollow structure characters for enhanced photodegradation RhB efficiency. The SEM showed that the samples were the regular micro-spheres with a diameter of 1.5–2 μm, and the TEM image displayed these microspheres having multi-shell hollow structures with core–shell morphology. The RhB was degraded (83%) under visible light irradiation within 150 min. This multi-shell hollow CeO 2 (MSH-CeO 2 ) has a larger surface area and more oxygen vacancies (OVs), the catalytic performance is mainly improved by enhancing the light absorption properties and facilitating the separation efficiency of the electron-holes. This work introduces the effecting of morphology on the performance of the catalyst, which will provide a new idea for the construction of efficient photocatalysts. Graphical abstract
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RARE METALS
·
2022
·Vol. 41
·期 6
·1889-1898
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IF 6.318
Zheng Fei,Li Hao-Tong,Zheng Yan-Zhen,Wang Dan,Yang Ning-Ning,Ding Hai-Yang,Tao Xia
The polyvinyl carbonate (PVC) polymer solid electrolyte can be in-situ generated in the assembled lithium-ion battery (LIBs); however, its rigid characteristic leads to uneven interface contact between electrolyte and electrodes. In this work, trimethyl phosphate (TMP) is introduced into the precursor solution for in-situ generation of flexible PVC solid electrolyte to improve the interfacial contact of electrolyte and electrodes together with ionic conductivity. The PVC-TMP electrolyte exhibits good interface compatibility with the lithium metal anode, and the lithium symmetric battery based on PVC-TMP electrolyte shows no obvious polarization within 1000 h cycle. As a consequence, the initial interfacial resistance of battery greatly decreases from 278 Ω (LiFePO 4 (LFP)/PVC/Li) to 93 Ω (LFP/PVC-TMP/Li) at 50 °C, leading to an improved cycling stability of the LFP/PVC-TMP/Li battery. Such in-situ preparation of solid electrolyte within the battery is demonstrated to be very significant for commercial application. Graphical abstract
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Bio-Design and Manufacturing
·
2022
·Vol. 5
·期 2
·233-248
·
IF 5.887
Su Tingshu,Zheng Ao,Cao Lingyan,Peng Lingjie,Wang Xiao,Wang Jie,Xin Xianzhen,Jiang Xinquan
Following dental implantation, the characteristic bacterial milieu of the oral cavity may lead to peri-implant inflammation, which can negatively impact osseointegration and cause implant failure. To improve soft tissue sealing around the implant, enhance osseointegration, and improve implant success rates, this paper proposes a composite multifunctional coating (PHG) prepared using gelatin and polydopamine/hydroxyapatite nanoparticles, investigates the effects of this novel coating on cell adhesion, proliferation, antibacterial activity, osteogenic differentiation, and evaluates its immune-related properties. The PHG coating was proved to have satisfactory hydrophilicity and wettability for cell attachment. Furthermore, it improved the expression of adhesion-related genes and proteins in human gingival fibroblasts, indicating its adhesion-promoting effect. Additionally, bone marrow mesenchymal stem cells exhibited strong osteogenic differentiation potential and mineralization on PHG-coated surfaces. Notably, the PHG coating exhibited antibacterial activity against Streptococcus mutans , as well as anti-inflammatory effects, potentially via the regulation of macrophages. Therefore, the proposed PHG coating may promote soft tissue sealing and bone bonding, providing a potential strategy for the surface modification of dental implants.
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