Fermentation-Basel
·
2023
·Vol. 9
·期 2
·133
·
IF 3.7
Peng Cheng,Muhammad Usman,Muhammad Arslan,Huanqing Sun,Li Zhou,Mohamed Gamal El-Din
A Gram-positive exoelectrogenRhodococcus pyridinivoranssp. strain HR-1 was cultivated from leachate-fed microbial fuel cell (MFC) to study the biodegradation effect of pyridine. In the comparison with mixed cultured MFC, HR-1 presented a remarkable electrical capacity with a maximum output of 4.33 W/m3under 30 °C in neutral anolyte with 1 g/L acetate as a substrate. Further, HR-1 demonstrated the environmental resistance as a Gram-positive strain. Microbial metabolism was evident at pH between 5–9 and temperature in the range of 20–40 °C, whereas optimal condition for pyridine degradation was observed at 30 °C. This is the first study reporting the degradation of pyridine in the bio-electrochemical system that achieved a 42% ± 5% degradation rate in a full operation cycle at 2 g/L of the concentration. Considering the nonnegligible internal resistance of HR-1-inoculated MFC, trehalose lipid was also introduced as a bio-surfactant to reduce the charge transfer obstacle between the microbes and the electrodes. The surface morphology illustrated that the strain had a plump shape with a high specific area. Accordingly, bio-surfactant addition promoted the anode biomass (1.2 ± 0.1 mg/cm2to 1.7 ± 0.2 mg/cm2) and achieved a higher degradation rate (68% ± 4%). The feasibility of electrochemical disposal on pyridine and eminent adaptability of strain sp. HR-1 as a Gram-positive exoelectrogen makes MFC a practical approach for real application.Keywords:microbial fuel cells;gram-positive exoelectrogen;pyridine;trehalose lipid;Rhodococcus pyridinivorans
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Guofei Zhang,Xin Yu,Zhenlong Wang,Sirong Li,Yunjiong Zhu,Yude Wang,Xuechun Xiao
Organic fuels are the main factors affecting the morphology, pore structure and catalytic active sites of metal oxides in solution combustion synthesis (SCS). However, due to the diversity of organic fuel structures, the specific role of organic fuel types on SCS is questionable. In this work, we compared the effects of five organic fuels on the thermocatalytic active sites of graded porous MgCo 2 O 4 nanomaterials . MgCo 2 O 4 (CA-MCO) prepared with citric acid as fuel has the largest specific surface area and the richest pore structure with the largest number of active sites. And the porous CA-MCO exhibited the best catalytic properties that the T HTD of AP decreased by 206.06 °C, the activation energy ( E a ) decreased by 104.58 kJ·mol −1 , and the reaction rate ( k ) increased by 2.49 s −1 . A possible catalytic mechanism for the thermal decomposition of AP was also proposed based on TG-MS and Hall effect tests. Finally, CA-MCO was applied to AP/HTPB-based composite solid propellants (CSPs), and the results showed that the introduction of CA-MCO significantly shortened the ignition delay time of the CSPs (From 29 ms to 8 ms), indicating its potential application in the CSPs.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Yiyi Chen,Haixi Lu,Honghui Shi,Junli Zhu,Haifeng Wang
A novel improved up-conversion nanoparticles-based immunochromatographic assay (IUCNPs-ICA) was developed for the detection of zearalenone (ZEN). Lu 3+ -doped UCNPs were synthesized using the solvothermal method, and the UCNPs doped with 30 % Lu 3+ displayed optimal optical properties. The IUCNPs-ICA was subsequently developed for the detection of ZEN in cereals under optimized conditions. The detection time and limit of detection (LOD) were 10 min and 0.1 μg/L, respectively. Moreover, a good linear relationship was observed from 0 to 100 μg/L ZEN (r 2 = 0.9946) and high specificity for other mycotoxins. LODs in spiked maize and wheat reached 0.16 μg/kg, and recovery rates were 82.11–100.76 % and 79.64–98.51 %. There was good consistency between the results of IUCNPs-ICA, colloidal gold-ICA, and high-performance liquid chromatography (HPLC) in the detection of natural cereal samples. The collective results support the utility of IUCNPs-ICA as a reliable on-site screening method for ZEN residue analysis in various cereals.
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DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 9
·2603-2610
·
IF 4
Yue Zhang,Pengkun Xia,Hui Fan,Xiaohui Gao,Fangping Ouyang,Wei Chen
A glucose sensor with high sensitivity and low detection limit is vital for human beings’ health. Herein, a CoO nanoneedle array with an unique electronic structure was successfully constructed by a hydrothermal and subsequent high-temperature calcination process. The optimized CoO-400 nanoneedles exhibit a larger electrochemical active surface area, beneficial electronic structure, favorable lattice distortion, and abundant active sites, which effectively promote electrochemical properties toward glucose sensing. The glucose sensor constructed by CoO-400 nanoneedles shows a high sensitivity of 84.23 mA cm−2 mM−1 and low detection limit of 4.4 × 10−7 M, superior to the results from most previous reports. Moreover, outstanding anti-interference ability, superior long-term stability, good repeatability, and satisfactory reproducibility in glucose detection for CoO-400 nanoneedles are also demonstrated.
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Food & Function
·
2023
·Vol. 14
·期 4
·1897-1908
·
IF 6.1
Yuan Yuan,Shun Zhong,Zeyuan Deng,Guangyan Li,Hongyan Li
In this study, the effects of particle size on the microstructure, nutrient components and antioxidant activities of bee pollen were evaluated. Moreover, the in vitro simulated digestion model was used to explore whether there was a size effect on the release behavior of phenolic compounds from the bee pollen matrix. Results showed that the greater the damage degree of the bee pollen wall, the smaller the bee pollen particle became. The decrease in the bee pollen particle size promoted the release and extractability of sugar, protein, phenolics and flavonoids, and improved their antioxidant activities. In addition, during simulated digestion, the dissolution of total phenolics and flavonoids, as well as the antioxidant activities of bee pollen, increased with the decrease in the particle size. Results showed that minimizing the particle size of bee pollen was not always beneficial for bioaccessible phenolic compounds because their content and bioavailability decreased when the particle size became smaller than 200 μm.
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Analytical Methods
·
2023
·Vol. 15
·期 7
·944-950
·
IF 3.1
Wenzhan Yu,Qian Li,Liqiong He,Renlong Zhou,Lifu Liao,Jinhua Xue,Xilin Xiao
Camphor leaves were used as the precursor for the hydrothermal synthesis of carbon quantum dots. The preparation method is simple and rapid, and the raw material is environmentally friendly and easy to obtain. Without additional modification, the carbon quantum dots were used as fluorescent probes for the sensitive and selective detection of Fe3+ and isoniazid at different excitation wavelengths. For Fe3+, at the excitation wavelength of 320 nm, the ratio of fluorescence intensity of CQD solution after adding Fe3+ to CQD solution without Fe3+ addition, F/F0, and Fe3+ concentration showed a good linear relationship in the range of 2.72 × 10−5 to 1.00 × 10−4 mol L−1 (R2 = 0.9912), and the limit of detection was 8.16 μmol L−1. For isoniazid, at the excitation wavelength of 270 nm, the ratio of fluorescence intensity of CQDs solution with isoniazid to CQDs solution without isoniazid, F/F0, and isoniazid concentration showed good linear relationships in the range of 3.81 × 10−6 to 1.00 × 10−5 mol L−1 (R2 = 0.9941) and 1.00 × 10−5 to 2.10 × 10−4 mol L−1 (R2 = 0.9910) respectively, and the limit of detection was 1.14 μmol L−1. A fluorescence method for the determination of Fe and isoniazid content was proposed. The method has been used to detect iron in iron supplement tablets and isoniazid in isoniazid tablets with satisfactory results.
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ELECTROANALYSIS
·
2023
·Vol. 35
·期 7
·e202200519
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IF 3
Man Zheng,Bohan Cao,Jiaxian Liu,Kun Shi,Yufan Zhang,Huan Wang
In this study, a simple method was designed to prepare ordered mesoporous carbons embedded with molybdenum without any extreme conditions. We prepared three different ordered molybdenum carbide materials with mesoporous structures to explore the influence of the structure of molybdenum-based materials on the HER catalytic efficiency. The ordered mesoporous molybdenum carbide catalysts (CMK-3-MoCx, fCMK-3-MoCx, CMK-8-MoCx) were characterized by SEM, TEM, XRD, nitrogen adsorption-desorption and XPS. The HER is catalyzed efficiently on the three electrocatalysts, fCMK-3-MoCx shows the best HER electro-catalytic performance with a small onset potential of −0.06 V vs. RHE, a low tafel slope of 66 mV dec −1 and a small over-potential value of 89 mV at 10 mA cm −2 . This excellent performance on HER is due to its high specific surface area and highly ordered mesoporous structure that resulted in excellent proton transport efficiency and high electron transfer rate. Our results provide a new research direction for the application of flat ordered mesoporous structures in catalysis.
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Food & Function
·
2022
·Vol. 14
·期 1
·250-261
·
IF 6.317
Wenjie Yu,Fengjie Sun,Ruixin Xu,Meng Cui,Yongquan Liu,Quanyuan Xie,Limin Guo,Chenxian Kong,Xin Li,Xiali Guo,Liping Luo
Castanopsis is diffusely spread in tropical and subtropical regions and is an important nectar source plant in China. The Castanopsis honey (CH) is characterized by its bitter taste. However, its composition and functions remain unclear. In this study, the physicochemical parameters, chemical composition, and antioxidant capacity of CH were comprehensively investigated, with the anti-inflammatory effects of the Castanopsis honey extract (CHE) evaluated based on the RAW 264.7 cell inflammatory model. The results revealed a high level of quality in CH based on the quality standards. Among a total of 84 compounds identified in CH, 5 high response compounds and 29 phenols were further quantified by UPLC-Q/TOF-MS. The high content of phenylethylamine (117.58 ± 64.81 mg kg−1) was identified as a potential marker of CH. Furthermore, the CH showed evident antioxidant activities, and the anti-inflammatory activities of CHE were observed to inhibit the release of nitric oxide (NO) and reduce the content of tumor necrosis factor alpha (TNF-α) and improve the content of interleukin-10 (IL-10) by regulating the NF-κB pathway. Our study indicates that CH has sound physicochemical properties and biological activities with a high level of quality, providing strong experimental evidence to support the further economic and agricultural development and application of CH.
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JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
·
2022
·Vol. 98
·期 3
·773-781
·
IF 3.709
Wei Zhang,Zheng Shen,Ling Kong,Wenbo Chen,Minyan Gu,Meng Xia,Wenjie Dong,Yalei Zhang
BACKGROUND The conversion of glucose into 5-hydroxymethylfurfural (5-HMF) involves the isomerization of glucose to fructose catalyzed by Lewis acid and subsequent dehydration of fructose catalyzed by Brönsted acid. In this work, in order to obtain a high yield of 5-HMF, a series of Sn-Al-Beta catalysts containing both Lewis and Brönsted acid sites were prepared by a convenient solid state ion exchange (SSIE) method using partially dealuminated Beta zeolite and tin(II) acetate. RESULTS The obtained bifunctional catalysts were investigated for one-pot production of 5-HMF from glucose in the ionic liquid (IL) [C 4 mim]Cl. Among various catalysts, Sn-Al-Beta- 4 - 8 exhibited the best catalytic performance, giving a 5-HMF yield of 54% under optimal reaction conditions (393 K, 2 h), along with a glucose conversion of 81%. The Sn-Al-Beta- 4-8 catalyst and IL were regenerated by the extraction of 5-HMF, and the reactivity was reserved after five runs of recycling. In addition to glucose, the Sn-Al-Beta- 4-8 /[C 4 mim]Cl system was also proven to have the potential to effectively convert other carbohydrates into 5-HMF. CONCLUSION The results suggested that the catalyst is convenient to prepare and has preferable efficiency and stability in the conversion of carbohydrates into 5-HMF. © 2022 Society of Chemical Industry (SCI).
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qing Yao,Jinyao Ye,Yahui Chen,Lihui Huang,Lining Sun,Zhinan He,Jianing Wu,Yingyi Zhao,Xinyu Zhao,Aimin Cai,Xiandan Chen,Hailun Zheng,Aliaksei Sysa,Congying Xie,Ruijie Chen,Longfa Kou
The clinical presentation of triple-negative breast cancer signifies a pathophysiological trajectory characterized by an aggressive nature. To satisfy the rapid tumor cell proliferation, glycolysis emerges as the primary modality for energy production, consequently engendering the copious generation of lactic acid. This, in turn, fosters an acidic microenvironment within the tumor milieu, which facilitates angiogenesis, tumor metastasis, extracellular matrix remodeling, and immune evasion. If the glycolytic flux was attenuated, a heightened influx of glucose-6-phosphate (G6P) towards the pentose phosphate pathway (PPP) ensues, promoting the synthesis of nicotinamide adenine dinucleotide phosphate (NADPH) and reduced glutathione (GSH). This orchestrated metabolic cascade gives rise to reductive equivalents and biosynthetic substrates, emblematic of a salient hallmark in the landscape of cancer cell metabolism. To surmount the quandary presented by aberrant tumor metabolism, we developed macrophage-membrane-coated metal–organic framework nanoparticles (AP@ZIF-Mem) to deliver atorvastatin (an inhibitor of MCT4, a lactic acid transporter within glycolysis) and polydatin (an inhibitor of G6PD, the rate-limiting enzyme of PPP) to interfere the glucose metabolism for sensitizing triple-negative breast cancer treatment. After i.v. injection, AP@ZIF-Mem could be accumulated into the tumor site via macrophage-biomimetic behavior. Through orchestrated intervention, these nanoparticles could provoke the accumulation of lactic acid within tumor cells, thereby precipitating a pronounced intratumoral acidosis; In parallel, the abrogation of G6PD function occasioned a surge in intracellular reactive oxygen species (ROS), consequentially culminating in diminished ribulose-5-phosphate and NADPH production. This dual-pronged intervention not only disrupted the tumor's energy provisioning framework but also perturbed the aberrant redox state of the tumor milieu, thereby sensitizing tumor treatment and impeding the metastatic trajectory. This study provided a paradigm of treatment/adjuvant treatment via the manipulation of glucose metabolism for triple-negative breast cancer.
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Applied Surface Science Advances
·
2023
·
IF 6.2
Xinyu Zhang,Tingwei Zhang,Jiaqi Guo,Wenyuan Zhu,Mohammad Rizwan Khan,Huining Xiao,Junlong Song
Sugar is an excellent raw material for activated carbon preparation because of its wide availability, sustainability, and low mineral content. Herein, we developed an easy method for preparing sucrose-derived activated carbon (SAC) with desirable hierarchically porous structures by combining the foaming of molten sucrose, dual-templating (K 2 C 2 O 4 ·H 2 O and CaCO 3 ), and sequential etching by dual-templating activators at elevated temperatures. As an adsorbent, SAC–800 has a high specific surface (1594 m 2 /g), with rich both micro- and mesopores (microsurface vs external surface area is 812 and 782 m 2 /g). As a result of its desirable hierarchically porous structures, it adsorbs dyes fast and efficiently, attributed to the rich specific surface area that favors adsorption capability and pore size distribution that affects mass transport and adsorption speed. The adsorption for Rhodamine B and Congo Red is spontaneous and endothermic process. The adsorption capacities reach 357 and 780 mg/g for Rhodamine B and Congo Red, respectively, while the rate constants for adsorption (k a ) and desorption (k d ) for Rhodamine B are 4.23 × 10 –3 L/(mg·min) and 0.12 L/min, and 1.02 × 10 –3 L/(mg·min) and 5.6 × 10 –3 L/min for Congo Red. With the easy preparation procedure and the desirable hierarchically porous structures, sucrose-derived activated carbons are promising candidates for potential practical applications.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Liu He,Jiangyu Su,Teng You,Shuang Xiao,Ping Huang,Daiping He,Ping Jiang
Layered double hydroxides have been widely used for electrochemical glucose detection due to their layered structure with more active sites, but they suffer from lower electrical conductivity and long-time hydrothermal preparation. In this paper, NiFe-layered double hydroxide nanosheets supported on nickel foam (NiFe-LDH NSs/NF) was prepared using an ultrafast and facile method via in-situ corroding foam nickel in FeCl 3 solution under room temperature, and the whole synthetic process can be accomplished within several minutes. The as-fabricated NiFe-LDH NSs/NF shows significant catalytic activity in the glucose oxidation, showing its great promise in glucose detection. As a self-supported electrode, NiFe-LDH NSs/NF is favorable for glucose detection, with a sensitivity of 9.79 and 3.29 mA mM −1 cm −2 within the linear range of 0.001 to 1.16 mM and 1.16 to 4.67 mM, respectively. Moreover, NiFe-LDH NSs/NF is also selective and reliable towards glucose detection in drink sample.
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