CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2022
·Vol. 38
·期 5
·1287-1291
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IF 2.726
Gong Yu,Pan Jing,Zhang Lingling,Wang Xiao,Song Shuyan,Zhang Hongjie
Electrochemical reduction of carbon dioxide into value-added products is a promising way to recycle the greenhouse gas, thus solving the crisis of global warming. Pressing challenges remain in regulating the catalytic selectivity. In this work, we demonstrated a metal-organic frameworks-assisted approach to synthesizing In species loaded on the surface of N doped carbon matrix. By controlling the particle sizes, the catalytic selectivity can be easily altered. The obtained In c /NC possesses the outstanding capability for converting CO 2 into CO. And 80.09% Faraday efficiency (FE) of CO can be achieved at 0.8 V vs. RHE. While the In 2 O 3 /C exhibits different catalytic behaviors, the main product is formic acid and the FE is more than 50% at 0.8 V vs. RHE. The selectivity reversal can be attributed to the strong interactions between In clusters and N atoms of carbon supports, which efficiently inhibits the formation of the by-product, formic acid. Our research has paved a new way to modulate catalytic selectivity by manipulating the fine structures of the catalysts.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Ren Qingyong,Qi Ji,Yu Dehong,Zhang Zhe,Song Ruiqi,Song Wenli,Yuan Bao,Wang Tianhao,Ren Weijun,Zhang Zhidong,Tong Xin,Li Bing
One of the greatest obstacles to the real application of solid-state refrigeration is the huge driving fields. Here, we report a giant barocaloric effect in inorganic NH 4 I with reversible entropy changes of \(\Delta {S}_{{P}_{0}\to P}^{{{\max }}}\) ∼ 71 J K −1 kg −1 around room temperature, associated with a structural phase transition. The phase transition temperature, T t , varies dramatically with pressure at a rate of d T t /d P ∼ 0.79 K MPa −1 , which leads to a very small saturation driving pressure of Δ P ∼ 40 MPa, an extremely large barocaloric strength of \(\left|\Delta {S}_{{P}_{0}\to P}^{{{\max }}}/\Delta P\right|\) ∼ 1.78 J K −1 kg −1 MPa −1 , as well as a broad temperature span of ∼ 41 K under 80 MPa. Comprehensive characterizations of the crystal structures and atomic dynamics by neutron scattering reveal that a strong reorientation-vibration coupling is responsible for the large pressure sensitivity of T t . This work is expected to advance the practical application of barocaloric refrigeration.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 14
·11446-11454
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IF 2.779
Lu Youluan,Mu Xinwei,Liu Yaopeng,Shi Zhen,Zheng Yin,Huang Wensheng,Lou Fangming
Through simple bioconcentration, salt molecules of NaCl and KCl were introduced into lotus root, then a class of porous carbon materials (CPLR) with 3D pore structure based on the as-prepared lotus root was prepared by direct pyrolysis under different temperature. The CPLR was characterised by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman spectra (Raman). In addition, the electrochemical performance of the CPLR-based sensors was examined by electrochemical impedance spectroscopy and cyclic voltammetry. Under the first-rank experimental conditions, the response current increased linearly with the concentration of hesperetin in the range from 0.05 to 100.0 μmol/L, and the minimum detectability was calculated to be 0.011 μmol/L ( S / N = 3). The sensor in Chinese herbal medicine buddleja officinalis maxim and healthy human urine samples performed well.
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AQUACULTURE INTERNATIONAL
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2022
·Vol. 30
·期 4
·1835-1853
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IF 2.953
Wang Rui-Fang,Wang Yuan,Zhang Jun,Weng Mei-Qi,Liu Yu-Hui,Cheng Qiu-Yan,Song Min,Yang Yan-Ping,An Xiao-Ping,Qi Jing-Wei
Aquaculture research has focused on polysaccharides as they are among the most promising new-generation immunostimulant used to control aquatic diseases. The aim of this study was to investigate the immunomodulatory effects of fermented wheat bran polysaccharides (FWBPs) on juvenile common carp ( Cyprinus carpio ). Carps were fed different FWBP amounts (0%, 0.1%, 0.2%, and 0.4%) for 8 weeks and then their skin mucus and serum immune parameters, hepatopancreas antioxidant indicators, and immune-related gene expression in the intestines, kidneys, and spleen were measured. The skin mucus IgM levels significantly increased in 0.1% FWBP group, but decreased in 0.4% FWBP group. The skin mucus protease and the serum alkaline phosphatase activities increased significantly in the 0.2%, 0.1%, and 0.4% FWBP groups, respectively. The serum total Ig levels increased noticeably in the 0.1% and 0.2% FWBP groups. The highest and lowest serum lysozyme activities were observed in the 0.1% and 0.4% FWBP groups, respectively. The hepatopancreatic total superoxide dismutase activity was higher in the 0.1% FWBP group than in the control. The malondialdehyde levels decreased significantly in the 0.2% and 0.4% groups. The intestinal mRNA levels of the LZM - C and IL-10 genes were significantly higher in the 0.2% than in the 0.4% FWBP group; TNF-α was significantly upregulated in the 0.1% group. The gene expression in the kidneys did not differ significantly among the treatments, except for a significant increase in the IL-10 expression in the 0.1% treatment. Significantly elevated expression of LZM-C in 0.2% group and IL-10 in 0.1% group was observed in the spleens. TNF-α and IL-1β were significantly downregulated in the 0.4% group. These results suggest that FWBPs could be used as immunostimulant feed additives in common carp cultures.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
An Jing,Tang Shanliang,Hong Gaobo,Chen Wenlong,Chen Miaomiao,Song Jitao,Li Zhiliang,Peng Xiaojun,Song Fengling,Zheng Wen-Heng
The most common working mechanism of photodynamic therapy is based on high-toxicity singlet oxygen, which is called Type II photodynamic therapy. But it is highly dependent on oxygen consumption. Recently, Type I photodynamic therapy has been found to have better hypoxia tolerance to ease this restriction. However, few strategies are available on the design of Type I photosensitizers. We herein report an unexpected strategy to alleviate the limitation of traditional photodynamic therapy by biotinylation of three photosensitizers (two fluorescein-based photosensitizers and the commercially available Protoporphyrin). The three biotiylated photosensitizers named as compound 1 , 2 and 3 , exhibit impressive ability in generating both superoxide anion radicals and singlet oxygen. Moreover, compound 1 can be activated upon low-power white light irradiation with stronger ability of anion radicals generation than the other two. The excellent combinational Type I / Type II photodynamic therapy performance has been demonstrated with the photosensitizers 1 . This work presents a universal protocol to provide tumor-targeting ability and enhance or trigger the generation of anion radicals by biotinylation of Type II photosensitizers against tumor hypoxia.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Fang Bo,Yan Jianmin,Chang Dan,Piao Jinli,Ma Kit Ming,Gu Qiao,Gao Ping,Chai Yang,Tao Xiaoming
The development of continuous conducting polymer fibres is essential for applications ranging from advanced fibrous devices to frontier fabric electronics. The use of continuous conducting polymer fibres requires a small diameter to maximize their electroactive surface, microstructural orientation, and mechanical strength. However, regularly used wet spinning techniques have rarely achieved this goal due primarily to the insufficient slenderization of rapidly solidified conducting polymer molecules in poor solvents. Here we report a good solvent exchange strategy to wet spin the ultrafine polyaniline fibres. The slow diffusion between good solvents distinctly decreases the viscosity of protofibers, which undergo an impressive drawing ratio. The continuously collected polyaniline fibres have a previously unattained diameter below 5 µm, high energy and charge storage capacities, and favorable mechanical performance. We demonstrated an ultrathin all-solid organic electrochemical transistor based on ultrafine polyaniline fibres, which operated as a tactile sensor detecting pressure and friction forces at different levels.
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Advanced Composites and Hybrid Materials
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2022
·Vol. 5
·期 4
·2817-2833
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IF 11.806
Ma Zhongying,Zhang Zhihao,Zhao Fei,Wang Yuhua
The development of cotton fabrics with flame-retardant and durable self-cleaning abilities is of considerable importance to practical application and economic values. In this work, a composite coating was designed using synthesized graphite carbon nitride (GCN) and phosphorylated chitosan (PCS) for cotton fabrics through a layer-by-layer self-assembled technique. The fabrics with four bilayers (G/PCS-4) exhibited low heat release (55.8% reduction compared with control cotton) and high limited oxygen index of 30.1% and achieved desired self-extinguishing with a damaged char length of 7.2 cm in vertical combustion test. This was manifested to benefit from the good performance of char-forming and efficient barrier action of the coating in which PCS catalyzed the cotton to form an expanded and stable char layer with the help of GCN. Moreover, the intensified adsorption capacity of PCS strengthened the photocatalytic activity of GCN on the surface. The degradation rate of the G/PCS-2 sample to rhodamine B can reach nearly 90% in 15 min. These coated fabrics also presented eminent and durable photodegradation capability for various organic compounds such as methylene blue and methyl orange, which can be utilized for self-cleaning for pollutants on the surface. This work opens a broad mind for the exploration for multi-functional textiles with flame retardant, self-cleaning, and even other functions in their application. Graphical abstract A composite coating which exhibits superior flame-retardant and self-cleaning performance was constructed on the surface of cotton fabrics.
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ENVIRONMENTAL MONITORING AND ASSESSMENT
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2022
·Vol. 194
·期 5
·1-10
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IF 3.307
Yang Nan,Ge Zhimeng,Li Aihong,Wei Baiyong,Li Yinming,Zhang Ye,Shen Qianjin,Wang Tuqiang,Wu Xueqian,Cao Xiangdong,Guo Jianping,Wang Zhaojia
The municipal solid waste incineration (MSWI) fly ash has been a major problem with the rapid development of the cities in China. And the cement rotary kiln co-processing technique is accepted as an effective method to dispose detrimental heavy metals in MSWI fly ash. This study focused on presented the total leaching content and the morphological distribution of the heavy metals in cement solid samples doped with MSWI fly ash. These samples were collected from a MSWI fly ash co-processing cement rotary kiln plant. The leaching test and the sequential extraction procedure were adopted to measure the migration characteristic of As, Pb, Cu, and Zn. In addition, the leachability of clinker samples under different simulated environmental conditions was also detected to analyze the security of the cement product doped with MSWI fly ash. This work demonstrates the feasibility of the cement rotary kiln MSWI fly ash co-processing technique and provides a scientific guidance to related plant.
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Food Biophysics
·
2022
·Vol. 17
·期 4
·586-597
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IF 3.34
He Wen-Jing,Chen Nan,Yu Zhi-Long,Sun Qun,He Qiang,Zeng Wei-Cai
Effect of catechins with different structure complexity on the properties of glutenins was investigated, and its action mechanism and potential application were further explored. Four catechins, including epicatechin (EC), epigallocaetchin (EGC), epicatechin-3-gallate (ECG) and epigallocatechin-3-gallate (EGCG), could cause glutenins aggregation, further changed the spatial structures and thermal stability of glutenins, and the action sequence of catechins was as: EGCG > ECG > EGC > EC. Meanwhile, all catechins might not interrupt the covalent bonds of glutenins including peptide bonds and disulfide bonds. By molecular docking analysis, hydrogen and hydrophobic bonds were the main molecular interactions between catechins and glutenins, and the binding strength of catechins on glutenins could be ranked as: EGCG > ECG > EGC > EC. Results indicated that esterified catechins (EGCG and ECG) had stronger binding effects on glutenins than non-esterified catechins (EGC and EC). Furthermore, catechins in tea polyphenols could interact with glutenins in wheat flour, and improved the quality of bread including structure, specific volume, texture and color. All present results suggested that the gallic acyl group and hydroxyl group in catechins could promote the interaction of catechins with glutenins, and catechins could significantly affect the spatial structure and physicochemical properties of glutenins. So, catechins showed the potential for improving the properties of glutenins in chemical and food industries. Graphical Abstract
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Chinese Medicine
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2022
·Vol. 17
·期 1
·1-16
·
IF 4.546
Chen Jia-Qian,Chen Yan-Yan,Du Xia,Tao Hui-Juan,Pu Zong-Jin,Shi Xu-Qin,Yue Shi-Jun,Zhou Gui-Sheng,Shang Er-Xin,Tang Yu-Ping,Duan Jin-Ao
Background Rhei Radix et Rhizoma (rhubarb), as one of the typical representatives of multi-effect traditional Chinese medicines (TCMs), has been utilized in the treatment of various diseases due to its multicomponent nature. However, there are few systematic investigations for the corresponding effect of individual components in rhubarb. Hence, we aimed to develop a novel strategy to fuzzily identify bioactive components for different efficacies of rhubarb by the back propagation (BP) neural network association analysis of ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometry for every data (UPLC-Q-TOF/MSE) and integrated effects.Methods Through applying the fuzzy chemical identification, most components of rhubarb were classified into different chemical groups. Meanwhile the integration effect values of different efficacies can be determined by animal experiment evaluation and multi-attribute comprehensive indexes. Then the BP neural network was employed for association analysis of components and different efficacies by correlating the component contents determined from UPLC-Q-TOF/MSE profiling and the integration effect values. Finally, the effect contribution of one type of components may be totaled to demonstrate the universal and individual characters for different efficacies of rhubarb.Results It suggested that combined anthraquinones, flavanols and their polymers may be the universal character to the multi-functional properties of rhubarb. Other components contributed to the individuality of rhubarb efficacies, including stilbene glycosides, anthranones and their dimers, free anthraquinones, chromones, gallic acid and gallotannins, butyrylbenzenes and their glycosides.Conclusion sOur findings demonstrated that the bioactive components for different efficacies of rhubarb were not exactly the same and can be systematically differentiated by the network-oriented strategy. These efforts will advance our knowledge and understanding of the bioactive components in rhubarb and provide scientific evidence to support the expansion of its use in clinical applications and the further development of some products based on this medicinal herb.
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JOURNAL OF NANOBIOTECHNOLOGY
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2022
·Vol. 20
·期 1
·1-15
·
IF 9.429
Du Bin,Zheng Mei,Ma Huizhen,Huang Jingshu,Jiao Qingqing,Bai Yimeng,Zhao Mengmeng,Zhou Jie
Multidrug resistance is still a major obstacle to cancer treatment. The most studies are to inhibit the activity of the drug transporter P-glycoprotein (P-gp), but the effect is not ideal. Herein, a nanosystem was built based on cascade catalytic consumption of cholesterol. Cholesterol oxidase (natural enzyme, COD) was immobilized on the carrier (NH2-MIL-88B, MOF) through amide reaction, COD catalyzed the consumption of cholesterol, the reaction product H2O2 was further produced by the MOF with its peroxidase-like activity to produce hydroxyl radicals (•OH) with killing effect. Due to the high expression of CD44 receptor on the surface of tumor cells, we encapsulated chondroitin sulfate gel shell (CS-shell) with CD44 targeting and apoptosis promoting effect on the surface of DOX@MOF-COD nanoparticles, which can accurately and efficiently deliver the drugs to the tumor site and improve the effect of reversing drug resistance. Taking drug-resistant cell membrane as "breakthrough", this paper will provide a new idea for reversing multidrug resistance of tumor.Graphical Abstract
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-11
·
IF 17.694
Li Sitong,Zhang Rui,Zhang Guanghao,Shuai Luyizheng,Chang Wang,Hu Xiaoyu,Zou Min,Zhou Xiang,An Baigang,Qian Dong,Liu Zunfeng
A microfluidic manipulation system that can sense a liquid and control its flow is highly desirable. However, conventional sensors and motors have difficulty fitting the limited space in microfluidic devices; moreover, fast sensing and actuation are required because of the fast liquid flow in the hollow fibre. In this study, fast torsional and tensile actuators were developed using hollow fibres employing spiral nonlinear stress, which can sense the fluid temperature and sort the fluid into the desired vessels. The fluid-driven actuation exhibited a highly increased response speed (27 times as fast as that of air-driven actuation) and increased power density (90 times that of an air-driven solid fibre actuator). A 0.5 K fluid temperature fluctuation produced a 20° rotation of the hollow fibre. These high performances originated from increments in both heat transfer and the average bias angle, which was understood through theoretical analysis. This work provides a new design strategy for intelligent microfluidics and inspiration for soft robots and smart devices for biological, optical, or magnetic applications.
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