Nature Ecology & Evolution
·
2023
·Vol. 7
·期 9
·1444-1456
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IF 16.8
Guo Lei,Qiao Xiaomu,Haji Diler,Zhou Tianhao,Liu Zhihan,Whiteman Noah K.,Huang Jia
The molecular mechanisms of coevolution between plants and insects remain elusive. GABA receptors are targets of many neurotoxic terpenoids, which represent the most diverse array of natural products known. Over deep evolutionary time, as plant terpene synthases diversified in plants, so did plant terpenoid defence repertoires. Here we show that herbivorous insects and their predators evolved convergent amino acid changing substitutions in duplicated copies of the Resistance to dieldrin ( Rdl ) gene that encodes the GABA receptor, and that the evolution of duplicated Rdl and terpenoid-resistant GABA receptors is associated with the diversification of moths and butterflies. These same substitutions also evolved in pests exposed to synthetic insecticides that target the GABA receptor. We used in vivo genome editing in Drosophila melanogaster to evaluate the fitness effects of each putative resistance mutation and found that pleiotropy both facilitates and constrains the evolution of GABA receptor resistance. The same genetic changes that confer resistance to terpenoids across 300 Myr of insect evolution have re-evolved in response to synthetic analogues over one human lifespan.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 17
·1-10
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IF 2.8
Jiang Yizhou,Zhang Yongqing,Zhou Jiahang,Li Yunbo
A high-performance electro-thermal heater needs not only excellent thermal conductivity but high electric conductivity with the aim of a lower operating voltage to generate heat continuously and effectively. The graphene-poly(vinyl alcohol) composite film with carbon nanotubes (CNTs) network structure had been fabricated which has outstanding electrical conductivity and electric heating ability. The influence of CNTs on the electrical conductivity and electro-thermal ability of the composite film materials was investigated by adjusting the ratio of CNTs to Gr. The results show that the Gr sheets and CNTs were successfully connected by chemical bonding using 3-aminopropyltriethoxysilane. The sheet resistivity of Gr/CNTs composite film decreases significantly with the improvement of CNTs content. Besides, the sheet resistivity of Gr/CNTs composite film decreases gradually with the bending times increase. The voltage of 7.0 V can generate a temperature of 143.7 °C, which is not only a human-safe voltage, but also within the support range of most portable power sources. Accordingly, the thin Gr/CNTs composite film supplies a new and simple method preparation of the flexible electro-thermal heater.
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Biomass Conversion and Biorefinery
·
2023
·
IF 4
Chen Yang,Qi Wei,Shakeel Usama,Liang Cuiyi,Wang Wen,Hu Yunzi,Wang Zhongming,Yuan Zhenhong,Shen Fei,Wang Qiong
The efficient fractionation and recovery of lignocellulosic biomass (LCB) constituents, hemicellulose, cellulose, and lignin, are ideal for LCB utilization. In this study, we prepared a solid acid catalyst (SPS120-40) with high acid density using polystyrene resin (PS) as precursor. The synthesized catalyst was characterized by XPS, 13 C NMR, TG-FTIR-MS, and so on to investigate its structural properties and thermal stability. During process optimization using FeCl 3 -assisted SPS120-40, a total of 78.9% xylose yield with 96.6% monosaccharide selectivity was achieved. Moreover, the catalyst showed extraordinary catalytic activity until five runs without significant loss in xylose yield. The pretreated residue was further treated with NaOH-1-butanol to effectively remove the lignin deposited on the residue surface and eventually 89.5% hydrolysis rate was obtained. At the same time, 64.4% lignin was obtained in the residue of enzymatic hydrolysis. This work provides important guidance for utilizing the whole components of lignocellulose.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 17
·1-12
·
IF 2.8
Ramya A. Janaki,Shobanadevi N.,Mangaiyarkarasi S. P.,Sankar R.
Promoting the charge separation to improve photocatalytic performance of semiconductor photocatalysts is very important in the field of artificial photosynthesis. Here, a novel MoS 2 /CdS 2D–2D ultrathin nanosheet heterostructure was fabricated via a one-pot solvothermal route. The obtained 2D–2D MoS 2 /CdS nanojunction has not only provided large contact areas, but also shortened the charge-transport distance, resulting in significantly enhanced photocatalytic H 2 evolution property. By optimizing the 2D MoS 2 amounts in the heterojunction, the 5 wt% 2D/2D MoS 2 /CdS heterojunction displayed the maximal photocatalytic H 2 evolution rate of 5566 μmolh −1 g −1 under visible-light irradiation in the presence of lactic acid as the sacrificial reagent, which was 10.1 times higher than that of pristine 2D CdS (516 μmolh −1 g −1 ). Based on the photoelectrochemical and photoluminescence spectra tests, it could be deduced that the charge separation and transfer of 2D/2D MoS 2 /CdS heterojunction were tremendously improved, and the recombination of photoinduced electron–hole pairs was effectively impeded. Moreover, the 2D MoS 2 was used as a co-catalyst to provide the abundant active sites and lower the overpotential for H 2 generation reaction. The current work would offer an insight to fabricate the 2D/2D heterojunction photocatalysts for splitting H 2 O into H 2 .
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Bio-Design and Manufacturing
·
2023
·Vol. 6
·期 4
·464-477
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IF 7.9
Qiao Qian,Zhang Xiang,Yan Zhenhao,Hou Chuanyu,Zhang Juanli,He Yong,Zhao Na,Yan Shujie,Gong Youping,Li Qian
Cryobioprinting has tremendous potential to solve problems to do with lack of shelf availability in traditional bioprinting by combining extrusion bioprinting and cryopreservation. In order to ensure the viability of cells in the frozen state and avoid the possible toxicity of dimethyl sulfoxide (DMSO), DMSO-free bioink design is critical for achieving successful cryobioprinting. A nontoxic gelatin methacryloyl-based bioink used in cryobioprinting is composed of cryoprotective agents (CPAs) and a buffer solution. The selection and ratio of CPAs in the bioink directly affect the survival of cells in the frozen state. However, the development of universal and efficient cryoprotective bioinks requires extensive experimentation. We first compared two commonly used CPA formulations via experiments in this study. Results show that the effect of using ethylene glycol as the permeable CPA was 6.07% better than that of glycerol. Two datasets were obtained and four machine-learning models were established to predict experimental outcomes. The predictive powers of multiple linear regression (MLR), decision tree (DT), random forest (RF), and artificial neural network (ANN) approaches were compared, suggesting an order of ANN>RF>DT>MLR. The final selected ANN model was then applied to another dataset. Results reveal that this machine-learning method can accurately predict the effects of cryoprotective bioinks composed of different CPAs. Outcomes also suggest that the formulations presented here have universality. Our findings are likely to greatly accelerate research and development on the use of bioinks for cryobioprinting. Graphic abstract
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Advanced Fiber Materials
·
2023
·Vol. 5
·期 5
·1725-1736
·
IF 16.1
Jiang Wangkai,Li Tingting,Hussain Bilqees,Zhou Suibo,Wang Zheshan,Peng Yu,Hu Jianchen,Zhang Ke-Qin
Thermoelectric (TE) textiles which can harvest thermal energy from the human body, are highly desirable and vital to the charging of wearable electronics owing to their stable and long-term power output. The typical carbon nanotube (CNT) yarns or bismuth telluride (Bi 2 Te 3 ) based inorganic TE materials used hitherto limit the development of TE textiles, because of their high cost and rareness. In this work, scalable and high-TE performance carbon nanotube composite yarns (CNTYs) are developed using p- and n-type tuneable multi-wall CNTs and single-wall CNTs as TE materials and waterborne polyurethane (WPU) as the binder. The mechanical properties of the CNTYs are tuned and improved considerably by adding a small amount of WPU. Furthermore, TE yarns with p- and n-type segmented structures are prepared by treating CNTYs with poly(3, 4-ethylene dioxythiophene): polystyrene sulfonate solution and n-type dopant polyetherimide, respectively. Based on the prepared p- and n-type segmented TE yarns, a TE textile with 75 p–n pairs that achieve outstanding TE output is fabricated. The TE textile can generate a high power density of 95.74 μW m −2 with a voltage density of 3.76 V m −2 at a temperature difference of 32 K. It provides an output voltage of ~ 37 mV outdoors (~ 12 ℃) when worn on the arm and demonstrates potential application to electronic devices after amplification. The fabrication method used in this study is not only a low-cost, scalable for preparing high-performance TE yarns but also realizes the body heat harvesting and temperature sensing of yarn-based TE textiles. Graphical Abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2022
·Vol. 33
·期 33
·24986-24994
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IF 2.779
Cheng Li-Qian,Jiang Guozheng,Ma Zhenhua,Xu Ze,Yu Minghao,Lu Jingtong,Chen Kai
Al-doped BaZr 0.2 Ti 0.8 O 3 (BZT20) ceramics were prepared by solid-state sintering, and the relaxation degree of phase transition was tailored effectively. The microstructure, dielectric properties, ferroelectric properties, and electrocaloric (EC) performance of Al 2 O 3 -doped BZT20 ceramics were studied, respectively. The results show that Al 2 O 3 doping induces changes in Curie temperature and dielectric properties. When the additive amount of Al 2 O 3 is 1.25 at.%, the Curie temperature drops to around room temperature (RT), and the dielectric loss is lower than that of pure BZT20 ceramics. The diffusion constant γ reaches a minimum value of 1.57 when the Al 2 O 3 content is 1.25 at.%, indicating that a relatively large latent heat would be gathered while there is a phase transition. As a result, an enhanced EC response of ∆ T max = 0.293 K near RT is obtained when the Al 2 O 3 content is 1.25 at.%, which is 1.6 times that of pure BZT20. It is also impressive that a wide working temperature range can be obtained, that is, T span = 73 K for BZT20 ceramics with 1 at.% of Al 3+ ionic content.
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MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 10
·1-9
·
IF 6.408
Wang Jiasheng,Zhang Decheng,Xu Keke,Hui Ni,Wang Dongwei
Dual-mode electrochemical aptasensor based on nitrogen-doped graphene (NG) doped with the conducting polymer polypyrrole (PPy) nanocomposite is proposed for the determination of acetamiprid. NG/PPy was electrodeposited onto the glassy carbon electrode (GCE) using cyclic voltammetry technique. NG/PPy/GCE showed outstanding electrocatalytic activity for the oxidation of nitrite due to “active region” induced by the charge redistribution of carbon atoms. The ultrasensitive dual-mode biosensor for acetamiprid could be easily developed by coupling acetamiprid aptamers with the NG/PPy hybrid. The specific binding between acetamiprid and the aptamers resulted in the increase of differential pulse voltammetry (DPV) signal change and the decrease of chronoamperometry (CA) signal, and the concentration of acetamiprid could be measured. The working potentials of DPV and CA were − 0.2 ~ 0.4 V and − 0.4 ~ 0.4 V (vs. SCE), respectively. The dual-mode acetamiprid biosensor showed a wide linear range from 10 −12 to 10 −7 g mL −1 , with low detection limits of 1.15 × 10 −13 g mL −1 and 7.32 × 10 −13 g mL −1 through DPV and CA modes, respectively. Moreover, owing to high active area and superior conductivity, as well as good electrocatalytic ability, the dual-sensing platform based on NG/PPy nanocomposite supported the quantification of acetamiprid in complex samples. Graphical abstract A dual-mode electrochemical aptasensor based on NG/PPy nanocomposite for acetamiprid detection was proposed through both the increase of differential pulse voltammetry (DPV) signal change and the decrease of chronoamperometry (CA) signal of the nitrite oxidation electrocatalyzed by NG/PPyn in sensors and biosensors.
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JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 57
·期 36
·17277-17290
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IF 4.682
Wan Xiang,Wang Jiafei,Wang Dian,Xu Qin,Xie Fazhi,Qu Qishu
In a mixed solvent composed of acetonitrile and ethanol, tetrabutyl orthotitanate (TBOT) was quickly introduced into the pores of the core–shell silica particles (SiO 2 @ d SiO 2 ) using the coordination bond formed between N and Ti. Since all the hydrolysis reactions of TBOT occurred in the pores, SiO 2 @ d SiO 2 spheres coated with TiO 2 (S@S@TiO 2 ) with an effective loading of TiO 2 as high as 74% were obtained. Because all TiO 2 nanoclusters are located in the pores, their growth is restricted by the pores. So the size of crystalline grains in the pores of the shell slowly increases with the increase in the calcination temperature. Due to the confined growth of TiO 2 nanoclusters, S@S@TiO 2 still maintains the anatase phase when the calcination temperature is as high as 1050 °C, which is significantly higher than the maximum thermal stability temperature of 900 °C reported in the literature. When used as photocatalysts for the degradation of Rhodamine B under UV irradiation, the catalytic activity of S@S@TiO 2 calcined at 950 °C is 2.1 times higher than that of the commercial P25 TiO 2 photocatalyst. Graphical abstract
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BMC MICROBIOLOGY
·
2022
·Vol. 22
·期 1
·1-13
·
IF 4.465
Guo Tingting,Sun Xiaoli,Yang Jie,Yang Liying,Li Mengying,Wang Yuhang,Jiao Hongmei,Li Guocai
Background Acinetobacter baumannii (A. baumannii) is an opportunistic pathogen and has emerged as one of the most troublesome pathogens. Drug resistance in A. baumannii has been reported on a global scale. Minocycline was found to be active against multi-drug resistant A. baumannii and was approved by the FDA for the infections caused by sensitive strains of A. baumannii. However, the emergence of minocycline resistance and its toxic effects still need to be addressed. Therefore, this study aimed to evaluate the synergistic effects of metformin combined with minocycline on minocycline-resistant A. baumannii . Results The effect of metformin on the antibacterial activity of minocycline was determined by checkerboard and time-killing assay. Further, it was observed by biofilm formation assay that metformin combination with minocycline can inhibit the formation of biofilm. Outer membrane integrity, membrane permeability, membrane potential and reactive oxygen species (ROS) were monitored to explore the underlying synergistic mechanisms of metformin on minocycline. And the results shown that metformin can destroy the outer membrane of A. baumannii , enhance its membrane potential, but does not affect the membrane permeability and ROS. Conclusion These findings suggested that the combination of metformin and minocycline has the potential for rejuvenating the activity of minocycline against minocycline-resistant A. baumannii .
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Nano Research
·
2022
·Vol. 16
·期 4
·5880-5886
·
IF 10.269
Tian Zhengbin,Deng Xiaohui,He Ping,Wang Guang-Hui
Monolithic catalysts play a crucial role in various catalytic applications, e.g., chemical synthesis, energy conversion, and environmental treatment, but their catalytic efficiency is often limited by the restricted mass transfer and insufficient exposure of active sites. Herein, we present a dual-templating strategy to fabricate atomic Pt dispersed on monolithic N-doped mesoporous carbon nanowires (Pt 1 /NMCW) with abundant super-/macropores, which, as monolithic catalyst, exhibits high catalytic performance in hydrogenation of 4-nitrophenol (4-NP). During synthesis, triblock copolymer (Pluronic F127) is employed as a primary soft template to generate the mesoporous structured carbon nanowires to improve the accessibility of Pt single sites; KCl crystallite is used as a secondary hard template to create the super-/macropores, which are beneficial for enhancing the mass transfer efficiency. Thanks to the dual-templating strategy that creates the monolithic carbon nanowires with hierarchically porous structure, the obtained Pt 1 /NMCW shows highly enhanced catalytic activity in 4-NP hydrogenation, outperforming its analogue synthesized without using KCl as template and being comparable to the nano-powder catalyst (i.e., atomic Pt loaded on the N-doped carbon nanospheres, Pt 1 /NCS).
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COLLOID AND POLYMER SCIENCE
·
2022
·Vol. 300
·期 10
·1187-1195
·
IF 2.434
Li Xin,Gao Yongfeng,Li Yaozong,Li Yanqun,Liu Haotian,Yang Zhuohong,Wu Hong,Hu Yang
Cinnamon essential oil (CNO) is a natural and renewable antibacterial agent. However, CNO is highly volatile and unstable, which limits its practical application as a long-term and wide antibacterial agent. In order to improve the CNO stability, we have microencapsulated CNO into composite microcapsules basing on Pickering emulsion stabilized by silica (SiO 2 ) nanoparticles. The CNO-loaded composite microcapsules possess the hybrid microcapsule shell including SiO 2 , xanthan gum and chitosan. Moreover, the results show that the microcapsules have spherical appearance. Microencapsulation technique effectively promotes the CNO stability, and the loaded CNO is slowly released from microcapsules. The antibacterial test indicates that the minimal inhibitory concentration of microcapsules was 2 mg mL −1 against Escherichia coli and Staphylococcus aureus , and the microcapsules can play an effective long-term antibacterial effect. Thus, Pickering emulsion templates is a convenient and effective technique to construct antibacterial essential oil-contained microcapsules, which can be used as long-term antibacterial agents.
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