JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2026
·Vol. 37
·期 4
·318
·
IF 3.2
Su Xiuyuan,Chen Yuan-Bin,Tang Ruxuan
Based on the Na 0.48 La 0.52 MoO 4 ceramic, this study replaced La 3+ ions with Nd 3+ ions through ion substitution, which significantly increased the Q × f of Na 0.48 La 0.52 MoO 4 and reduced the sintering temperature. The good sintering state of this series of ceramics was demonstrated by scanning electron microscopy (SEM) and density tests. X-ray diffraction (XRD) and Raman spectroscopy results revealed the formation of solid solutions without the presence of secondary phases or impurities. The P–V–L theory indicated that the Na/La/Nd–O bond-to-bond ionicity (fi) contribution was dominant, while the Mo–O bond also played a significant role in the lattice energy ( U ), bond energy ( E ), and thermal expansion coefficient ( α ). Among them, the Na 0.48 La 0.48 Nd 0.04 MoO 4 ceramic achieved the best dielectric performance at 900 °C, with ɛ r = 11.027 ± 0.018, Q × f = 113,805 ± 6,358 GHz, and τ f = − 23.36 ppm/℃. Through ion substitution, these materials all have low sintering temperatures and high Q × f values, making them ideal candidates for low-temperature co-fired ceramics (LTCC).
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·131
·
IF 5.4
Jin Meng,Ning Qiong,Zhang Mengping,Wei Haiyan,Meng Xiao,Chen Wenwen,Pan Hui,Xiu Haidi,Liu Lisheng,Wang Cuijuan
A novel surface-enhanced Raman scattering (SERS) based strategy is described for the rapid identification and quantitative determination of deltamethrin and its metabolite 3-phenoxybenzaldehyde in biological samples. A multifunctional sensor was developed using metal-organic framework-801 (MOF-801) and silver nanoflowers (Ag NFs), synthesizing an Ag NFs/MOF-801 composite. This composite is a dual-function material, acting as both a SERS substrate and an adsorbent, which was integrated into a portable 10-well plate. The addition of MOF-801 enhances enrichment selectivity and efficiency, while the abundant tips and rough surfaces of Ag NFs significantly improve SERS sensitivity. The determination of deltamethrin revealed a marked linear relationship between the SERS signal intensity and the logarithmic analyte concentration, with R-values falling within a range 0.959 to 0.972, with detection limits between 0.07 and 0.15 ppb, indicating suitability for clinical applications. This method successfully analyzed a patient sample, showing strong agreement with conventional chromatographic results while ensuring both practicality and accuracy. Notably, the detection process does not necessitate any sample preparation and can be completed within five min, highlighting its potential as an efficient and user-friendly POCD sensor for diagnosing poisoning in emergency settings.
Section
Graphical
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Nature Communications
·
2026
·
IF 18.1
Zhong Rui,Fu Yanjie,Jiang Shubao,Wang Shan,Yue Liang,Tan Weihong
Multistable systems, ideally, could stabilize at any desired, switchable state within a continuous spectrum. However, conventional systems, constrained by signal-mediated mutual activation or inhibition, are limited to a finite set of discrete steady states. Here, we propose a rational framework for achieving continuously tunable multistability through reversible displacement reaction-mediated competition between positive autoregulatory DNA polymerization/nicking modules. This framework harnesses the chemical energy of dNTP hydrolysis to suppress spontaneous interconversion between modules for stabilizing at any target state along a continuous compositional gradient. With unparalleled tunability, the framework enables continuous, orthogonal state transitions and concentration-adaptive molecular memory in response to transient stimuli. Moreover, the single-stranded DNAs generated by polymerization/nicking reactions can be customized with predefined structures and functions, enabling continuously multistable control over downstream processes, e.g., biocatalysis and RNA transcription, while maintaining multistability. This framework establishes a versatile and robust platform for developing chemical and material systems with continuously tunable multistability.
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Microbial Cell Factories
·
2026
·
IF 4.9
Ma Jinglin,Zhuang Yan,Guan Huiting,Zhang Zhenjun,Zhu Ning,Han Changze,Wang Yonggang,Chen Jixiang
Cytochrome P450 monooxygenases (CYPs) constitute a versatile family of biocatalysts capable of regio- and stereoselective hydroxylation, offering significant potential for pharmaceutical synthesis and the environmental remediation of endocrine-disrupting steroids. Although their synthetic utility is widely recognized, the mechanistic basis of their activity, particularly in bacteria, remains insufficiently explored. Building on prior discovery of steroid-degrading activity in Rhodococcus erythropolis KB1, in this study, we functionally characterized three putative P450 enzymes (CYP125ARh1, CYP125ARh2, and CYP153ARh3) identified from its genome. Substrate-binding assays demonstrated strong affinity toward progesterone and testosterone, but negligible affinity for 11β-hydroxysteroids, including cortisol and corticosterone. In vitro conversion assays revealed that all three enzymes specifically catalyze 16α-hydroxylation of progesterone and testosterone, although with varying catalytic efficiencies. Among them, CYP125ARh2 was identified as the most efficient enzyme, achieving near-quantitative conversion of progesterone (88%) and testosterone (62%). Kinetic analysis further underscored the superior catalytic properties of CYP125ARh2, which displayed lower Michaelis constants (K m = 16.41 ± 1.97 µM for progesterone and 24.50 ± 2.60 µM for testosterone) and higher turnover rates (V max = 6.05 ± 0.16 µM/min and 5.09 ± 0.13 µM/min, respectively). The superior catalytic efficiency of CYP125ARh2 originates from its unique active site architecture, which integrates a pre‑organized, synergistic residue network with pronounced induced‑fit plasticity. This structural synergy enables precise substrate positioning and optimal reaction geometry, thereby rationalizing its high 16α‑hydroxylation activity toward both progesterone and testosterone. These findings highlight CYP125ARh2 as a promising template for engineering high-performance biocatalysts. Overall, this work provides foundational insights into the role of the P450 enzymes in steroid chemistry and the biodegradation of steroidal pollutants.
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International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 2
·727-736
·
IF 8.8
Li Yuting,Wang Jie,Tang Fu,Gao Junheng,Li Lidong
Coal cinder is an abundant byproduct of the extensive consumption of coal in industrial production and daily life. Making full use of the cinder is conducive to a low-carbon economy. In this study, inspired by the burning of coal, a new method for constructing a silica-based composite porous material (SiO 2 -CPM) was developed by combusting a siloxane-modified anthracite coal gel (CSiO 2 gel). During this process, the combustion product was directly converted into a porous material, and the calorific value of the coal remained nearly unchanged (∼98% of the original calorific value was retained), demonstrating the viability of this method for energy-efficient applications. The SiO 2 -CPM exhibited an ultra-low thermal conductivity (0.036 W/(m·K) at room temperature), outperforming conventional insulation materials (e.g., cotton ∼0.05 W/(m·K)). Additionally, it showed enhanced mechanical strength (fracture stress of 41.8 kPa) compared to the powder state of the coal cinder. Experimental results indicate that the amount of siloxane, structure-directing agent, and an acidic environment were critical for mechanical enhancement. The SiO 2 -CPM showed good dimensional stability against thermal expansion and exhibited excellent thermal insulation and fire resistance even at 900°C. Meanwhile, the SiO 2 -CPM with complex geometry could be easily fabricated using this method owing to the excellent shaping ability of the CSiO 2 gel. Compared to conventional methods such as sol–gel synthesis or freeze-drying, this approach for fabricating SiO 2 -CPM is simpler and cost-effective and allows the direct utilization of coal cinder post-combustion.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 8
·496
·
IF 3.5
Tang Chuiyun,Yao Jun,Liu Xingyu,Lv Ying,Liu Jianli,Masakorala K.
Blast furnace slag (BFS) is an industrial by-product that generates large volumes of waste and poses potential environmental risks, necessitating its safe utilization. In this study, iron (hydr)oxide modified blast furnace slag (FBFS) was prepared by loading iron (hydro)oxides onto BFS for the remediate of lead (Pb) and cadmium (Cd) from aqueous solutions and soil. This adsorbent not only provides a novel approach for valorizing BFS but also prevents the agglomeration of iron (hydr)oxide particles, resulting in more surface functional groups (such as Fe–O and –OH) and an increased specific surface area. The results showed that the adsorption process of Pb fit the PSO and Langmuir models, and that of Cd followed the Elovich and Langmuir models. The maximum adsorption capacities of Pb and Cd by FBFS2 and FBFS6 in single-component system were 352.93, 395.15, and 112.34, 119.04 mg·g −1 , respectively. In binary system, Pb exhibited a stronger inhibitory effect on Cd adsorption. The underlying mechanisms, including ion exchange, complexation, precipitation, and flocculation. In addition, FBFS significantly reduced the bioavailability of Pb, Cd and Zn in the soil, decreased by 20.03%, 45.86% and 58.75%, respectively. This study suggests that FBFS is a promising candidate for the simultaneous remediation of heavy metals in both aqueous solution and contained soil.
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MULTIMEDIA TOOLS AND APPLICATIONS
·
2021
·Vol. 80
·期 8
·11471-11489
·
IF 2.757
Wang Zhiyang
According to the problem of spliced money in ATM (Automatic Teller Machine), the paper puts forward a template matching algorithm for recognition of left and right numbers based on one-dimensional gray scale projection. First it uses the Canny boundary detection algorithm to separate the banknote boundary from the R component image, and then preprocesses the image to make the subsequent processing easier; secondly applies the predefined location to divide the area of left and right numbers; thirdly calculates the one-dimensional gray scale projection curves of left and right numbers, based on which every character or number is divided; finally carries out the operation of template matching to obtain correlation coefficients of every character or number, comparing which with threshold it judges whether the left and right numbers are matched. For the transparent tape attached to the spliced money, a method based on the difference in object reflectivity to recognize the tape is designed. First it highlights the characteristics of the tape by preprocessing and binary morphological analysis of the B component image. Finally, it judges whether there is transparent tape on the surface of the banknote according to the set threshold value. Experimental results show that both number matching and tape detection can be completed, and algorithm can correctly recognize spliced money. The correct recognition rate of the algorithm reaches 100%, and the false positive rate、false negative rate are both 0. The processing is fast and simple, which meets the requirements of ATM.
研究领域:
计算机视觉
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图像处理
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纸币鉴伪
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模式识别
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JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2015
·Vol. 30
·期 1
·10-15
·
IF 0.399
Li Jingyin,Li Na,Li Changjia,Guo Yufeng
Sulfur/graphene composites with different sulfur contents were prepared by two-step synthesis, where graphene was regarded as a carrier of sulfur active substance. The surface structure and crystal form of the composites obtained were characterized and compared by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It was found that sulfur was partially coated by graphene. The graphene folds provided more nano-pores and electron transport channels for sulfur. From TGA results, the sulfur contents of the sulfur/graphene composites measured were about 42.32 wt%, 54.94 wt%, and 65.23 wt%. Electrochemical tests demonstrated that sulfur/graphene composite ( x =54.94 wt%) cathode exhibited better capacity retention (40.13%) compared with the pure cathode (20.46%), where an initial discharge capacity was up to 1 500 mAh·g −1 and it remained about 600 mAh·g −1 after 30 cycles. Furthermore, the electrochemical reaction mechanism and the state of reaction interface for Li/S battery were analyzed by cyclic voltammogram and AC-impedance spectra. The results indicated that the sulfur/graphene composite with a sulfur content of 54.94 wt%, based on a two-step synthesis, contributed to improving electrochemical properties of lithium/sulfur battery
研究领域:
材料科学
·
储能技术
·
电化学
·
纳米材料
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IONICS
·
2023
·Vol. 29
·期 9
·3517-3523
·
IF 2.8
Zou Jingmin,He Cuihong,Bao Jingze,Sun Chuan-Fu,Li Yafeng
Hard carbon (HC), composed of disorder graphite domain construction, provides defects, gaps, and nanopores that are beneficial for storing K-ion. In this work, hard carbon derived from spent black tea (THC) is synthesized through a two-step carbonization process. THC is an easy preparation, green, and high-abundance carbon material for highly stable potassium-ion storage. As an anode for potassium-ion batteries, it delivers a high capacity of 203 mA h g −1 at 30 mA g −1 and long-term cycling life with 90% capacity retention over 3.6 months. This superior cycle life is attributed to the highly reversible structure, rapid ion diffusion rate, and charge transfer rate of THC. Not only that, a full cell was assembled with THC as the anode and perylene 3,4,9,10-tetracarboxylic dianhydride (PTCDA) as the cathode. The PTCDA//THC delivers a high capacity of 48.6 mA h g −1 and an energy density of 107 W h kg −1 at 100 mA g −1 . These findings suggest that THC has considerable promise as a low-cost, high-stability anode material for potassium-ion batteries.
研究领域:
材料科学
·
储能
·
电化学
·
可持续材料
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TOPICS IN CATALYSIS
·
2026
·
IF 3.7
Mu Yifang,Li Yanhong,Huang Aisheng
Direct synthesis of dimethyl ether (DME) from carbon dioxide (CO 2 ) hydrogenation by using bifunctional catalysts has attracted much attention in view of CO 2 conversion and utilization. However, direct CO 2 hydrogenation to DME is challenging due to kinetics and thermodynamic limitations, thus requiring the development of more effective bifunctional catalysts. In this work, metal-organic framework (MOF) Cu/Zn-BTC derived CuZnO catalyst is developed and combined with HZSM-5 for direct CO 2 hydrogenation to DME. The influence of Si/Al ratio of HZSM-5, mass ratio of CuZnO and HZSM-5, reaction temperature, reaction pressure and space velocity on the catalytic performances of the CuZnO/HZSM-5 bifunctional catalysts is systematically examined in a fixed-bed reactor. Attributing to a high activity of the Cu/Zn-BTC derived CuZnO catalyst for CO 2 hydrogenation to methanol, the CuZnO/HZSM-5 bifunctional catalysts display high CO 2 conversion and DME selectivity. Under a mild reaction condition (225 °C and 3.0 MPa), a high CO 2 conversion of 54.3% and DME selectivity of 79.5% are obtained for the bifunctional catalysts, which outperform the state-of-the-art catalysts for CO 2 hydrogenation to DME. Further, after 100 h of reaction, the bifunctional catalyst can still maintain a high CO 2 conversion rate (~ 52.6%) and DME selectivity (~ 77.3%), which suggests promising prospects for industrial applications.
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JOURNAL OF PLANT BIOLOGY
·
2022
·Vol. 66
·期 1
·35-46
·
IF 3.15
Dun Wanwan,Wei Xuan,Wang Lu,Liu Jingjing,Zhao Jing,Sun Peipei,Fang Congbing,Xie Xingbin
The strawberry ( Fragaria × ananassa ) is an economically important perennial crop plant, and its fruits are rich in vitamin C ( l -ascorbic acid [AsA]) and other nutrients. l -galactono-1,4-lactone dehydrogenase (GalLDH) is a key enzyme in the terminal step of AsA biosynthesis pathway in plants. Here, the GalLDH gene ( FaGalLDH ) was cloned from ‘Benihoppe’ strawberries. AsA content increased during fruit development and peaked at the red-ripening stage, and AsA concentrations in different tissues were correlated with enzyme activity and transcription level of FaGalLDH . Transient over-expression of FaGalLDH in strawberry fruit increased its overall expression and AsA production significantly, whereas transient RNAi of FaGalLDH decreased its expression and AsA content. Furthermore, the optimum pH and temperature for FaGalLDH activity were 8.0 and 25 °C, respectively. Ectopic expression of the FaGalLDH gene in Arabidops is resulted in higher AsA content and enzyme activity in transgenic lines than in wild-type plants. FaGalLDH over-expression resulted in enhanced tolerance to salt stress due to reduced accumulation of malondialdehyde, H 2 O 2 , and O 2 .− , as well as higher survival rates, root length, proline content, and superoxide dismutase, peroxidase, and catalase activities. These results provide useful information regarding AsA biosynthesis and salt tolerance, which may help to improve strawberry fruit quality and productivity.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 30
·期 11
·28874-28888
·
IF 5.19
Zhu Tingting,Hou Yanping,Huang Guofu,Fu Tian,Yang Jinhang,Wang Yutong,Zhang Hanbing
Development of efficient photocatalysts is vital for light-driven removal of refractory antibiotics. Herein, Bi 2 WO 6 microspheres were successfully anchored on the surface of bentonite, and metallic Bi was reduced in-situ by a one-step solvothermal method. Notably, the Bi/Bi 2 WO 6 /BT with a mass ratio of 0.15:1:0.1 exhibited the best photocatalytic activity toward degradation of tetracycline (TC) and ciprofloxacin (CIP) after 120 min of visible light irradiation, and their reaction rate constants were 8.0 and 5.5 folds higher than that of pristine Bi 2 WO 6 , respectively. The boosted photocatalytic activity over Bi/Bi 2 WO 6 /BT was ascribed to the establishment of electrostatic repulsion and SPR effect, which synergistically promoted charges transfer, thus achieving more h + and ·O 2 − radical generation. Moreover, possible TC and CIP degradation pathways over Bi/Bi 2 WO 6 /BT were proposed based on the identified intermediates, and most of the intermediates were less toxic than TC and CIP. The study provides options to develop high-efficiency photocatalytic composites for contaminants elimination using semiconductors and readily available bentonite.
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