Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Zhu Wenbin,Wang Qunhui,Liu Feng,Zhang Yuanchun,Ma Xiaoyu,Li Yuan,Liu Shuo,Wu Chuanfu,Gao Ming
Based on previous studies on lactic acid (LA) production from food waste (FW, “cooked” waste from canteens and restaurants), the present study explored the feasibility of LA production from kitchen garbage (KG, “raw” waste from household kitchens). A considerable pretreatment method for fermentable sugar release in KG was investigated, and acid pretreatment was found to significantly promote polysaccharide hydrolysis. Furthermore, the optimal conditions of acid pretreatment were investigated through response surface methodology and determined to be 1.45% (w/v) sulfuric acid, 118.14 °C and 0.66 h, respectively, resulting in a polysaccharide conversion rate of 72.88%. Fourier transform infrared spectroscopy and X-ray diffraction revealed that the hemicellulose and lignin of KG were dissolved, which increased polysaccharide conversion in KG during acid pretreatment. Enterococcus mundtii was used in LA fermentation because it could metabolize a variety of fermentable sugars, including glucose, xylose, and fructose. Finally, the feasibility of LA production from KG hydrolysate with acid pretreatment was explored, and the maximum LA concentration and yield reached 60.3 g/L and 0.83 g/g total sugar, and 0.31 g/g KG (dry weight), respectively, which were 11% higher than those without acid pretreatment.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 8
·1-10
·
IF 6.408
Xiong Xiaolu,Zhu Peng,Li Shanshan,Jiang Yujiu,Ma Yurong,Shi Qingfan,Zhang Xu,Shu Xiaoming,Wang Zhiwei,Sun Linfeng,Han Junfeng
A large-size Bi 2 Se 3 tape electrode (BTE) was prepared by peeling off a 2 × 1 × 0.5 cm high-quality single crystal. The feasibility of using the flexible BTE as an efficient bioplatform to load Au nanoparticles and probe DNA for HIV-1 DNA electrochemical sensing was explored. Differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy (EIS) show that the resultant biosensor has a wide linear range from 0.1 fM to 1 pM, a low detection limit of 50 aM, excellent selectivity, reproducibility and stability, and is superior to the pM DNA detection level of Pt-Au, graphene-AuNPs hybrid biosensors. This outstanding performance is attributed to the intrinsic surface state of Bi 2 Se 3 topological insulator in facilitating electron transfer. Therefore, BTE electrochemical biosensor platform has great potential in the application for sensitive detection of DNA biomarkers. Graphical abstract
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Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Xiao Yaoxin,Zhang Jun,Zhu Lingjun,Shan Rui,Yuan Haoran,Chen Yong
A series of inexpensive electroplating sludge-derived magnetic copper-containing catalysts were developed for the selective hydrogenation of biomass-based furfural (FFR) into furfuryl alcohol (FA) and 2-methylfuran (MF). The specific structural characteristics of as-prepared magnetic copper-containing samples were clearly identified through various techniques, including XRD, XPS, N 2 adsorption–desorption, NH 3 -TPD, SEM and so on. The characterizations revealed that the hydrogen pre-activated magnetic catalysts supplied metallic Cu species, medium acidity and porosity for the catalytic upgrading of FFR in hydrogen atmosphere. As for FFR-to-FA as well as FFR-to-MF transformations, the magnetic copper-containing catalyst with calcination temperature of 800 °C exhibited excellent performance towards the formation of FA and MF, wherein desirable FA yield of 98.5 mol% and MF yield of 71.3 mol% were achieved at reaction temperatures of 160 °C and 240 °C, respectively. The reuse experiments indicated that the recycled catalysts still maintained excellent activity and stability even after four-time recycling. The present study thus highlights a new approach for the resource utilization of electroplating sludge, which also supplies low-cost and efficient catalytic materials for the selective upgrading of various biomass-derived platform molecules.
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IONICS
·
2022
·Vol. 28
·期 9
·4261-4271
·
IF 2.961
Ren Yujie,Yang Yujie,Li Jin,Zhu Wenjie,Gao Jiayi,Liu Yongguang,Dai Lei,Wang Ling,He Zhangxing
Biomass carbon materials have many advantages of wide source, environmental friendliness and low price. Herein, the carbon/bismuth composite (PHB) was employed as negative electrocatalyst for vanadium redox flow battery (VRFB). The composite was prepared by hydrothermal and high temperature treatment with pomelo peel and NaBiO 3 as raw materials for V 3+ /V 2+ redox reaction. Biomass carbon material exhibits large specific surface area, various oxygen-containing functional groups, and multiple reactive places. Metal bismuth can significantly inhibit the hydrogen evolution reaction, which can also provide abundant active sites. The composite catalyst not only inhibits the side reaction but also accelerates the kinetics in charge transfer and electron transport. Therefore, the composite catalyst can promote the comprehensive performance of negative electrode. At 150 mA cm −2 , the discharge capacity of the cell using PHB (88.5 mA h) is 36.8 mA h higher than the blank cell. Energy efficiency is increased by 9.1% after using PHB. This work provides a carbon/bismuth composite, which is a promising catalyst in VRFB.
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POLYMER BULLETIN
·
2022
·Vol. 80
·期 5
·5587-5605
·
IF 2.843
Zhou Jiacheng,Wu Linlin,Ge Yongxin,Gao Yifeng,Ma Xiaofeng,Fang Ying
Deep eutectic solvent (DES)-based gels, with their biocompatibility, non-volatility, low cost, and electrochemical stability, have attracted widespread interest as novel solid-state ionic conductor for flexible devices. However, fabrication of tough and stretchable DES gels is challenging due to the insufficient understanding of the interactions between polymers and DES. The development of tough DES gels based on hydrogen bonding is attractive but also challenging due to the possible competitive hydrogen bonds between the hydrogen bond-rich choline chloride-based polar DES and polymers. Herein, tough copolymer-supported DES gels with dual-cross-linked dissipative network were fabricated through copolymerization of methacrylic acid and N , N -dimethylacrylamide monomers with good and poor compatibility with DES to promote the formation of stable hydrogen bonds between polymers in the DES. The resulting DES gels were stiff, tough, stretchable, and self-recoverable, with tensile strength, breaking strain, Young's modulus, toughness, and recovery ratio being 2.08 MPa, 792%, 1.76 MPa, 12.88 MJ m −3 , and 76%, respectively. The mechanical properties of DES gels could be widely tuned by varying the monomer ratio and solvent structure changes. The carbon-based supercapacitor based on the DES gel shows stable voltage window to 2 V and exhibits the specific capacitance of 93.25 F g −1 at 2 A g −1 . Graphical abstract An ultratough and stretchable copolymer-supported DES gel ionic conductor with high tensile strength of 2.08 Mpa, high toughness of 12.88 MJ m −3 , stretchability of 792%, and excellent recovery properties are facile fabricated for flexible electronics through copolymerization of two monomer pairs of methacrylic acid and N , N -dimethylacrylamide that can form stable hydrogen bonds in the DES environment with a small amount of chemical cross-linker to form a dual-crosslinked dissipative network.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 55
·83262-83272
·
IF 5.19
Zhou Xudong,Jiang Xincheng,Chen Jibao,Gao Pengcheng
The extensive use of tetracyclines in human and veterinary medicine causes contamination in the environment that could contribute to the spread of antibiotic-resistant bacteria or competition between species of phytoplankton. In this study, Microcystis aeruginosa (a bloom-forming cyanobacterium) and Chlamydomonas microsphaera (common green alga) were selected to test the effects of different concentrations of tetracyclines (tetracycline and oxytetracycline) in monoculture and co-culture. The results showed that compared with monoculture, the cell growth of C. microsphaera decreased significantly in co-culture treated with different concentrations of tetracycline and oxytetracycline. The ratios of inhibition of M. aeruginosa exposed to 0.1, 2, and 10 mg L −1 of tetracycline varied between 17.7 and 31.37% in co-culture compared with monoculture, while the cell growth of M. aeruginosa was enhanced by treatment with 0.1, 2, and 7.25 mg L −1 of oxytetracycline in co-culture. However, the cell growth of C. microsphaera was significantly inhibited by all the treatments in co-culture. With the treatment of tetracycline, the specific growth rate of M. aeruginosa was 0.36 to 0.31 day −1 in monoculture and co-culture, while that of C. microsphaera ranged from 0.38 to 0.26 day −1 in monoculture, and it decreased from 0.25 day −1 (0 mg L −1 ) to 0.08 day −1 (10 mg L −1 ) in co-culture. With the treatment of oxytetracycline, the specific growth rate of M. aeruginosa was stimulated in co-culture, while that of C. microsphaera was significantly inhibited in co-culture compared with monoculture. Therefore, although M. aeruginosa significantly inhibited C. microsphaera in co-culture with the tetracycline-free treatment, the competitive advantage of M. aeruginosa expanded following the addition of low or high concentrations of tetracyclines.
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JOURNAL OF PEST SCIENCE
·
2022
·Vol. 96
·期 3
·961-971
·
IF 5.742
Li Yuling,Wu Weifeng,Jian Rongchao,Ren Xiaofei,Chen Xiaole,Hong Weiqian David,Wu Min,Cai Jinglin,Lao Canyao,Xu Ximing,Sheng Zhaojun
The potential for essential oils (EOs) to act as a natural alternative for controlling mosquito populations has aroused extensive interest in recent years. Four EOs ( Thymus vulgaris (thyme), Foeniculum vulgare (fennel), Citrus medica (lime), and Camellia sinensis (green tea)) were selected in our previous larvicidal screening assays against Aedes albopictus . In this study, the active constituents of each EO were identified. Next, their acetylcholinesterase (AChE) inhibitory activity was evaluated, and the binding mode was studied by molecular docking. To improve EO stability and duration of activity, nanoemulsions were prepared and characterized. Thirteen constituents of the four EOs at the 100 ppm level led to 100% mortality of the larvae, the four most active constituents being α -hexyl cinnamaldehyde (LC 50 = 24.0 ± 0.3 ppm), limonene (LC 50 = 34.1 ± 0.7 ppm), α -terpinene (LC 50 = 50.0 ± 0.5 ppm), and carvacrol (LC 50 = 54.7 ± 0.6 ppm). These compounds, with the exception of α -hexyl cinnamaldehyde, also showed potent AChE inhibitory activity. Nanoemulsions with droplet size of 56.8–224.9 nm were prepared by emulsification at a 1:1 (v/v) ratio of EO and Tween 80. These EO nanoemulsions showed equally potent larvicidal activity as EOs themselves; moreover, they showed better stability and were active for longer time. These results suggest that natural EOs and their constituents have potential as larvicides for mosquito vector control and that nanoemulsification is an effective method for improving their physicochemical properties and efficacy.
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Scientific Reports
·
2022
·Vol. 12
·期 1
·1-7
·
IF 4.996
Wang Lele,Zhang Wei,Wang Ruilong,Guang Yongli,Zhang Daming,Zhang Chao,Hu Meng,Wei Zhiwen,Zhang Wenfang,Yun Keming,Guo Zhongyuan
The determination of length of time from the last drinking is critical for cases like drunk driving, sexual assault victims, and also postmortem suspected poisoning cases. The study was aimed to established a method of estimating the time of last drinking through the pharmacokinetic study of conjugation metabolites of alcohol in blood after a single oral dose. Twenty-six volunteers (14 males) consumed alcohol with food at a fixed dose of 0.72 g/kg after fasting for 12 h. Five milliliters of blood were collected 120 h after the start of drinking, and all samples were analyzed with headspace-gas chromatography and high-performance liquid chromatography–tandem mass spectrometry. The time point of last drinking was estimated through the relationship between the concentration ratio of ethyl glucuronide to ethyl sulphate and the length of time after drinking. Pharmacokinetic parameters were analyzed by a pharmacokinetic software DAS according to the non-compartment model. A good correlation model was obtained from the relationship between concentration ratio of ethyl glucuronide to ethyl sulphate in blood and the time of alcohol use, and the margin of error was mostly lower than 10%. The time of maximum concentration, maximum concentration, and elimination half-life of ethyl glucuronide in blood were 4.12 ± 1.07 h, 0.31 ± 0.11 mg/L and 2.56 ± 0.89 h; the time of maximum concentration, maximum concentration, and elimination half-life of ethyl sulphate in blood were 3.02 ± 0.70 h, 0.17 ± 0.04 mg/L, and 2.04 ± 0.76 h. The study established a potential method to estimate the length of time after a moderate oral dose, and provided pharmacokinetic parameters of ethyl glucuronide and ethyl sulphate in Chinese population.
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2022
·Vol. 48
·期 10
·4163-4182
·
IF 3.134
Yang Fanger,Zhang Haowen,Tang Qi,Lu Shihui,Zhang Hongsheng,Zheng Xiaohua
Photocatalysis is considered to be one of the possible routes to solve energy crises at a low cost. Graphitic-C 3 N 4 combined with other semiconductors at the nanoscale has demonstrated a promising potential in photocatalysis application owing to the heterojunction configuration. In this study, Ag/g-C 3 N 4 /CuNb 2 O 6 -4 (mass ratio of CuNb 2 O 6 to g-C 3 N 4 = 1:4) composites were prepared by photo-deposition of Ag particles on the hydrothermally synthesized g-C 3 N 4 /CuNb 2 O 6 -4 composites. The microstructure, morphology, and light absorption property of the photocatalysts were characterized by X-ray diffractometry, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV–Vis diffuse reflectance spectroscopy. The photocatalytic properties of photocatalysts and active species responsible for the degradation of RhB dye under visible light were investigated. After loading Ag particles on the g-C 3 N 4 /CuNb 2 O 6 -4 composites, the resulting Ag/g-C 3 N 4 /CuNb 2 O 6 -4 composites show a bandgap of ~ 2.31 eV and a significant increase in photocatalytic efficiency. In particular, the photocatalytic activity of 11% Ag/g-C 3 N 4 /CuNb 2 O 6 -4 composite (Ag mass fraction = 11%) is nearly seven times that of orthorhombic CuNb 2 O 6 and 3.8 times that of g-C 3 N 4 /CNO-4 composite. The Z-scheme heterojunction has been successfully formed in the Ag/g-C 3 N 4 /CuNb 2 O 6 -4 composites and it enhances the photocatalytic performance significantly with the best degradation efficiency of 88% after 2 h.
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Nature Chemical Biology
·
2022
·Vol. 18
·期 8
·904-912
·
IF 16.174
He Ji-Xiang,Fei Zheng-Cong,Fu Ling,Tian Cai-Ping,He Fu-Chu,Chi Hao,Yang Jing
Chemoproteomics has emerged as a key technology to expand the functional space in complex proteomes for probing fundamental biology and for discovering new small-molecule-based therapies. Here we report a modification-centric computational tool termed pChem to provide a streamlined pipeline for unbiased performance assessment of chemoproteomic probes. The pipeline starts with an experimental setting for isotopically coding probe-derived modifications that can be automatically recognized by pChem, with masses accurately calculated and sites precisely localized. pChem exports on-demand reports by scoring the profiling efficiency, modification homogeneity and proteome-wide residue selectivity of a tested probe. The performance and robustness of pChem were benchmarked by applying it to eighteen bioorthogonal probes. These analyses reveal that the formation of unexpected probe-derived modifications can be driven by endogenous reactive metabolites (for example, bioactive aldehydes and glutathione). pChem is a powerful and user-friendly tool that aims to facilitate the development of probes for the ever-growing field of chemoproteomics.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 9
·1-9
·
IF 6.408
Yu Ying,Huang Gengli,Luo Xueli,Lin Wanmei,Han Yong,Huang Jihong,Li Zhonghong
A dual-emission fluorescent (FL) probe was constructed by coordinating Cu 2+ of copper metal–organic frameworks (Cu-MOFs) with − COO − group of carbon dots (CDs) for pesticide thiophanate-methyl (TM) determination. TM was recognized by organic ligands (H 2 BDC and H 2 BDC-NH 2 ) of Cu-MOFs via π stacking. Due to the higher affinity of Cu 2+ to TM than ligands and CDs, TM chelated with Cu 2+ to form TM-Cu complex. Thus coordination of Cu-MOFs was damaged and the ligands were released resulting in the FL intensity increase of Cu-MOFs (F 430 ). And also CDs were released from CDs@Cu-MOFs hybrids and electron transfer from CDs to CuMOFs was inhibited, leading to the FL intensity increase of CDs (F 600 ). The FL intensity ratio (F 430 /F 600 ) showed a good linear relationship with TM concentrations of 0.0307–0.769 μmol L −1 with a limit of detection (LOD) of ~ 3.67 nmol L −1 . The probe was successfully applied to detect TM in spiked food samples with satisfactory recoveries of 93.1–113%. Additionally, visual detection of TM was achieved according to the fluorescence color variation from blue to carmine, indicating promising application of CDs@Cu-MOFs probe. Graphical abstract
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Journal of Consumer Protection and Food Safety
·
2022
·Vol. 17
·期 3
·209-219
·
IF 2.628
Xie Jing-Ya,Tan Jin
This article describes a novel front-face synchronous fluorescence spectroscopy (FFSFS) method for the fast and non-invasive authentication of ground roasted Arabica coffee adulterated with roasted maize and soybean flours. The detection was based on the different composition of fluorescent Maillard reaction products and caffeine in roasted coffee and cereal flours. For each roasted maize or soybean adulterant flour (5–40 wt%), principal component analysis coupled with linear discriminant analysis (PCA–LDA) was used for qualitative discrimination. Quantitative prediction models were constructed based on the combination of unfolded total synchronous fluorescence spectra and partial least square regression (PLSR), followed by fivefold cross-validation and external validation. The PLSR models produced suitable results, with the determination coefficient of prediction ( R p 2 ) > 0.9, root mean square error of prediction (RMSEP) < 5%, relative error of prediction (REP) < 25% and residual predictive deviation (RPD) > 3. The limits of detection (LOD) were both 10% for roasted maize and soybean flours. Most relative errors for the prediction of simulated blind samples were between -30% and + 30%. The benefits of this strategy are simplicity, rapidity, and non-destructive detection. However, owing to the high similarity between roasted coffee and roasted cereal flours and the influence of the roasting degree on fluorescent Maillard reaction products, its application is limited to the preliminary screening of roasted coffee with the same roasting degree, adulterated with relatively large amounts of roasted cereal flours which are roasted to analogous color to the coffee.
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