CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Ru-Jun Chen,Yi-Bo Zhang,Ting Liu,Bing-Qing Xu,Yang Shen,Yuan-Hua Lin,Ce-Wen Nan
Li–La–Zr–O thin films were successfully fabricated using the sol-gel spin coating method and the effects of the addition of surfactant in the solution were studied. X-ray diffraction, scanning electron microscopy and Atomic Force Microscope were used to investigate the characteristics of these films and an amorphous structure and smooth surface on the films were revealed. The ionic conductivity of the film was investigated by impedance analysis. The results showed that the room-temperature ionic conductivity of the film increases with the content of surfactant, from 1.8 × 10 −6 S/cm for 0.5 wt% to 3.9 × 10 −6 S/cm for 1.5 wt%. However, further increasing the content of surfactant can deteriorate the property of the thin film on the contrary. The improvement of the property can be attributed to the improvement of the morphology of the film. We propose that this Li–La–Zr–O thin film is a promising solid electrolyte for thin-film lithium-ion batteries.
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INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 4
·1558
·
IF 4.9
Jiabin Huang,Haotian Wu,Ranran Gao,Lan Wu,Mengyue Wang,Yang Chu,Yuhua Shi,Li Xiang,Qinggang Yin
L-ascorbic acid (vitamin C, AA) is widely present in plants, but humans lack the ability to synthesize it independently. As a potent reducing agent, AA is susceptible to oxidation, making the enhancement of its stability crucial. 2-O-β-D-glucopyranosyl-L-ascorbic acid (AA-2βG) is a stable natural derivative of AA with glycosylation, initially discovered in the fruits ofLycium barbarum. Understanding the biosynthesis of AA-2βG is crucial for enhancing its production inL. barbarum. While the established biosynthesis pathway of AA constitutes the upstream of AA-2βG biosynthesis, the conclusive step of β-glycosylation remains unclear. We identified aL. barbarumcultivar by UPLC, ZN01, with a high content of AA-2βG, and compared its leaves, immature fruits, and mature fruits to a normal AA-2βG contentL. barbarumcultivar for metabolomic and transcriptomic analysis. The RNA-seq and RT-qPCR analysis revealed that the expression levels of genes involved in the AA biosynthesis pathway did not consistently correlate with AA-2βG content, suggesting that the final glycosylation step may be a key determinant of AA-2βG accumulation. Subsequently, utilizing phylogenetic and co-expression analysis, we identified ten UDP-glycosyltransferases (UGTs) and three β-glucosidases (BGLUs) which may be involved in the crucial step of the conversion from AA to AA-2βG, and the UGTs’ activities were predicted through molecular docking. Lastly, we speculated that the presence of the glycosylation process of AA might have a crucial role in maintaining AA homeostasis inL. barbarum, and deliberated on potential correlations between AA, carotenoids, and anthocyanins. Our integrated multi-omics analysis provides valuable insights into AA-2βG biosynthesis inL. barbarum, identifying thirteen candidate genes and highlighting the complex interplay between AA, carotenoids, and anthocyanins. These findings have implications for improving AA-2βG content inL. barbarum.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Baojun Wang,Fangzhi Huang,Ping Zhang,Shikuo Li,Hui Zhang
Ti 3 C 2 T x MXene aerogels with the advantages of better wave impedance matching and lightweight toward electromagnetic wave (EMW) protection have aroused widespread attention. However, the limited gelation capability and inadequate interfacial interactions between MXene nanosheets impose insurmountable challenges to construct robust, free-standing MXene monoliths with efficient absorption capability. Herein, a universal assemble-confinement strategy is presented to fabricate spatially dispersed transition metal sulfides anchored on MXene aerogels (MXene/TMS) via interfacial Ti-O-M bonds, in which the divalent metal ions (Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ ) mediate the rapid gelation and assembly of MXene nanosheets into hydrogels, followed by the topological transformation of sulfidation treatment. Benefiting from the macroscopic porous structure, intimate interfacial interactions generated by Ti-O-M bonds between MXene skeleton and metal sulfides, and numerous defect polarization sites, MXene/TMS aerogels deliver optimal impedance matching balance and enhanced attenuation capacities compared to MXene nanosheets. Specifically, MXene/CoS aerogels show remarkable EMW absorption performances, with a minimum reflection loss value of −69.6 dB and full X-band (8.2–12.4 GHz) absorption at an ultralow density of 0.021 g/cm 3 . Experimental results and simulation analyses demonstrate that the interfacial interactions effectively reinforce dielectric polarization responses. Additionally, stable thermal infrared stealth ability and excellent mechanical strength endow the MXene/CoS aerogel with multifunctional properties. This work provides a general approach for the rational design of MXene/TMS aerogels with multifunctional applications and presents a new insight into the electromagnetic dissipation mechanism of interfacial bonds for boosting dielectric interactions.
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ANALYTICAL BIOCHEMISTRY
·
2024
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IF 2.6
Cheng Li,Qinghui Chen,Jinqiao Rong,Houde He,Yu Lu,Yuxia Liu,Zhongfu Wang
As the main active glycoprotein of egg white, the biological functions of chicken ovomucin α- and β-subunit are closely related to the structure of glycans. However, the exact composition and structure of the subunit glycans are still unknown. We obtained highly pure chicken ovomucin α-subunit and β-subunit protein bands by the strategy combined with two-step isoelectric precipitation and SDS-PAGE gel electrophoresis. The ammonia-catalyzed one-pot procedure was then used to release and capture α-and β-subunit protein glycans with 1-phenyl- 3-Methyl-5-pyrazolone (PMP). The N / O -glycans of bis-PMP derivatives were purified and analyzed by LC-MS. More importantly, an effective dual modification was performed to accurately quantify neutral and sialylated O -glycans through methylamidation of sialic acid residues and simultaneously through carbonyl condensation reactions of reducing ends with PMP. We first showed that the α-subunit protein has only N -glycosylation modification, and the β-subunit only O -glycosylation, a total of 22 N -glycans and 20 O -glycans were identified in the α- and β-subunit, respectively. In addition, the complex N -glycan (47 %) and the sialylated O -glycan (77 %) are each major types of the above subunits. Such findings in this study provide a basis for studying the functional and biological activities of chicken ovomucin glycans.
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APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
·
2024
·Vol. 108
·期 1
·1-13
·
IF 3.9
Wu Zongzhan,Dou Wenyu,Yang Xiaolin,Niu Tengfei,Han Zhuzhen,Yang Li,Wang Rufeng,Wang Zhengtao
Abstract Oleanane-type ginsenosides are a class of compounds with remarkable pharmacological activities. However, the lack of effective preparation methods for specific rare ginsenosides has hindered the exploration of their pharmacological properties. In this study, a novel glycoside hydrolase Pl GH3 was cloned from Paenibacillus lactis 154 and heterologous expressed in Escherichia coli . Sequence analysis revealed that Pl GH3 consists of 749 amino acids with a molecular weight of 89.5 kDa, exhibiting the characteristic features of the glycoside hydrolase 3 family. The enzymatic characterization results of Pl GH3 showed that the optimal reaction pH and temperature was 8 and 50 °C by using p -nitrophenyl- β - d -glucopyranoside as a substrate, respectively. The K m and k cat values towards ginsenoside Ro were 79.59 ± 3.42 µM and 18.52 s −1 , respectively. Pl GH3 exhibits a highly specific activity on hydrolyzing the 28- O - β - d -glucopyranosyl ester bond of oleanane-type saponins. The mechanism of hydrolysis specificity was then presumably elucidated through molecular docking. Eventually, four kinds of rare oleanane-type ginsenosides (calenduloside E, pseudoginsenoside RP1, zingibroside R1, and tarasaponin VI) were successfully prepared by biotransforming total saponins extracted from Panax japonicus . This study contributes to understanding the mechanism of enzymatic hydrolysis of the GH3 family and provides a practical route for the preparation of rare oleanane-type ginsenosides through biotransformation. Key points • The glucose at C-28 in oleanane-type saponins can be directionally hydrolyzed. • Mechanisms to interpret PlGH3 substrate specificity by molecular docking. • Case of preparation of low-sugar alternative saponins by directed hydrolysis.
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Small
·
2024
·
IF 13
Yuye Dou,Xiangyi Zhang,Xinbo Zhao,Xia Li,Xiaohui Jiang,Xuefeng Yan,Liangmin Yu
This study addresses the challenge of designing simple and environmentally friendly methods for the preparation of effective electromagnetic wave (EMW) absorbing materials with tailored microstructures and multi-component regulation. N, O doped walnut-like porous carbon composite microspheres loaded with FeCo nanoparticles (WPCM/Fe–Co) are synthesized through high-temperature carbonization combined with soap-free emulsion polymerization and hydrothermal methods, avoiding the use of toxic solvents and complex conditions. The incorporation of magnetic components enhances magnetic loss, complementing dielectric loss to optimize EMW attenuation. The unique walnut-like morphology further improves impedance matching. The proportions of Fe and Co components can be adjusted to regulate the material's reflection loss, thickness, and bandwidth, allowing for fine-tuning of absorption performance. At a low filling ratio (16.7%), the optimal WPCM/Fe–Co composites exhibit a minimum reflection loss ( RL min ) of −48.34 dB (10.33 GHz, 3.0 mm) and an overall effective absorbing bandwidth (EAB) covering the entire C bands, X bands, and Ku bands. This work introduces a novel approach to composition regulation and presents a green synthesis method for magnetic carbon composite absorbers with high-performance EMW absorption at low loading.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Ju Liu,Danna Yan,Qianying Chen,Huayong Peng,Lu Jin,Chong Feng,Lixia Zhang,Guomin Zhao,Depo Yang,Zhimin Zhao
In this study, a homogeneous polysaccharide, named YDOP-1 was isolated form Dendrobium officinale using hot water extraction and ethanol precipitation method. YDOP-1 was characterized to be a typical O -acetyl-glucomannan with the molecular wight was 13,456 Da. Cell viability and colony forming assay showed that YDOP-1 possess moderate anti-gastric cancer effects. In order to further improve the anti-gastric cancer effects of YDOP-1, a selenium modification on YDOP-1 was performed. Energy dispersive spectrometer (EDS) and X-ray photoelectron spectroscopy (XPS) analysis demonstrated that the Se was successfully introduced into YDOP-1 by forming Se O bonds. Se modification significantly enhanced the anti-gastric cancer effects of YDOP-1, which could effectively inhibit the proliferation of MGC-803 cells via suppressing colony and inducing apoptosis by regulating the apoptosis proteins of Bax, Bcl-2, and Caspase-7. Our results indicated that the Se modified O -acetyl-glucomannan, YDOP-Se, was expected to be useful in the biomedicine field for the gastric cancer treatment.
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Journal of Energy Chemistry
·
2025
·
IF 14.9
Chenggong Niu,Yi Liu,Shuqing Zhou,Heyang Liu,Linyu Chen,Jingya Guo,Tayirjan Taylor Isimjan,Xiulin Yang
Triggering structural asymmetry can induce charge redistribution and modify electronic structures, which is of great significance for the design of high-performance hydrogen oxidation reaction (HOR) electrocatalysts. Herein, we propose a dual anion-induced strategy to create an innovative RuS 2 -RuO 2 heterostructure featuring abundant S-Ru-O interfaces (RuS 2 -RuO 2 @C). This RuS 2 -RuO 2 @C demonstrates an impressive mass activity of 2.61 mA μ g R u - 1 and an exchange current density of 2.96 mA cm −2 , surpassing Pt/C and other comparative samples by over 20 times. Durability assessments confirm the superior stability of RuS 2 -RuO 2 @C, with only minimal performance loss during operation. Density functional theory (DFT) calculations indicate that the asymmetric S-Ru-O configuration optimizes the interfacial electronic structure and shifts the d -band center closer to the Fermi level, effectively reducing the energy barrier of the rate-determining step (RDS) in the alkaline HOR process. Moreover, in situ attenuated total reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS) characteristics disclose the formation of a substantial hydrogen bond network at the S-Ru-O interface, which aids in the desorption of H 2 O ad and facilitates the vital Volmer step in the HOR pathway.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Haiyin Zhan,Chenxu Li,Zixuan Cao,Ruiren Zhou,Simiao Zhang,Ziyu Guo,Qixing Zhou
Y 2 O 3 is a cost-effective and environmentally friendly wide-band gap photocatalyst with extensive application potential. However, its limited ability to be excited by visible light restricts its practical uses. In this study, we coupled the narrow bandgap semiconductor AgI with Y 2 O 3 to form a Z-scheme heterostructure , significantly promoting its photocatalytic degradation activity. Characterization and experimental results demonstrated the formation of Y-O-Ag bonds through coupling with AgI, leading to an increase in oxygen vacancies in Y 2 O 3 , which promotes the chemisorption of H 2 O and O 2 . The Y-O-Ag bond introduction promotes electron transfer , improves hole utilization, and boosts energy transfer efficiency, thus promoting the efficient generation of ·OH and 1 O 2 . The photocatalytic degradation rates of RhB and o-nitrophenol by 7.5% AgI/Y 2 O 3 were 26.5 and 4 times higher than those of pure Y 2 O 3 , respectively. This study provides theoretical support for the Z-scheme heterojunction to improve photocatalytic activity and offers efficient solutions and practical design ideas for sewage purification.
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AICHE JOURNAL
·
2024
·
IF 3.5
Ying Tian,Changqing He,Xincheng Zhang,Lin He,Zhenghe Xu,Hong Sui,Xingang Li
Separating water-in-heavy oil (W/HO) emulsions at low (room) temperature is challenging when exploiting heavy oil. We propose an adaptable strategy for constructing Si/O-doped demulsifiers. A nonionic demulsifier (APBMP) has been synthesized based on polysiloxane modified by allyl polyether and butyl acrylate. APBMP achieves 95.97% dehydration within 5 min for W/HO emulsions at 288.15 K and complete dehydration in 15 min at 323.15 K. Mechanistic studies found that doping Si/O into the demulsifier molecules increases the number of hydrogen bond sites, which enables the demulsifiers to quickly disperse natural stabilizers (e.g., asphaltenes) and replace them at the oil–water interfacial film. The demulsifiers prefer to occupy the interfacial sites rather than dissolve into the bulk oil or water phases. Driven by hydrogen-bond-dominated noncovalent interactions, the oil–water interfacial film is softened, reconstructed, and broken. These findings provide insights into developing novel materials for oil–water separations in a low-carbon way.
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ChemistrySelect
·
2025
·Vol. 10
·期 1
·e202403867
·
IF 2
Ben Liu,Binghong Wu,Lianghui Chen,Xinxin Zhang,Jinguo Lin,Xiaoyun Chen
Graphical A cellulose-supported SnW(S,O) 4 bimetal sulfo-oxide catalyst (SW@C) with exceptional catalytic activity in the reduction of MB, RhB, and Cr(VI) in the presence of NaBH 4 under dark conditions were synthesized, which is significant for advancing future research on environmental pollution management using biomass-based materials. In this paper, cellulose-supported SnW(S,O) 4 bimetal sulfo-oxide catalysts (labeled as SnWSO-C or SW@C) with exceptional catalytic performance in the reduction of MB, RhB, and Cr(VI) in the presence of NaBH 4 under dark conditions were synthesized via an in-situ hydrolysis method. The cellulose-supported catalyst system with diverse tree species of Pinus massoniana (Pm), Populus tomentosa Carrière (Ptc), Rice hull (Rh), Phyllostachys edulis (Pe) was investigated. The 100 mL solutions of MB (20 ppm), RhB (50 ppm), and Cr(VI) (50 ppm) were completely reduced by SW@Cotton, SW@Pe, SW@Rh, SW@Ptc, and SW@Pm within 10, 7, 13, 4, and 4 min for MB; 7, 7, 8, 10, and 4 min for RhB; and 5, 8, 10, 10, and 8 min for Cr(VI), respectively. Among them, SW@Pe catalyst exhibits the highest catalytic reduction efficiency and excellent stability, maintaining a removal rate of 96% after six cycles. The superior catalytic reduction performance was attributed the unique properties of Phyllostachys edulis cellulose, characterized by low crystallinity (53.25%), minimal ash content (0.15%), and the lowest degree of polymerization (1267). These features facilitated the improved dispersion of the SnWSO bimetal sulfo-oxide, leading to smaller crystal size, lower electrochemical impedance (2.24 Ω), and a larger electrochemically active surface area (21.86 mF/cm 2 ). This study demonstrates the potential of cellulose-supported bimetal sulfo-oxide catalysts for wastewater treatment, which is significant for advancing future research on environmental pollution management using biomass-based materials.
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FUEL
·
2025
·
IF 7.5
Caitao Chen,Juan Ma,Yakun Tang,Xiaohui Li,Guangbo Liu,Hanyao Song,Yingluo He,Noritatsu Tsubaki,Lang Liu,Ting Liu
Cleaving the aromatic ether C-O bonds of lignite through catalytic hydroconversion (CHC) presents a significant challenge for producing organic chemicals and clean liquid fuels, which are vital for a sustainable future. In this study, we employed a sacrificial template-self-recovery strategy to synthesize highly dispersed and carbon-coated bimetallic catalysts MCo/C (M = Fe, Cu, Ni) for the CHC of Naomaohu coal (NMHC) and lignite-related model compounds (LRMCs). The carbon-coated NiCo bimetallic alloy catalysts, benefiting from the high dispersity of the active components and the synergistic effect between Ni and Co, exhibited excellent hydrogenolysis activity towards diphenyl ether (DPE). DPE conversion reached 100 % over Ni 3 Co 1 /C under optimal conditions (120 °C, 2 MPa H 2 , 2 h). Moreover, Ni 3 Co 1 /C significantly increased the content of arenes and alkanes while reducing the content of oxygen-containing compounds in the NMHC soluble portion (SP), demonstrating its efficient catalytic hydrogenolysis and hydrodeoxygenation capabilities. Density Functional Theory (DFT) calculations revealed that the Ni 3 Co 1 /C catalyst could activate H 2 to generate hydrogen radicals and diatomic active hydrogen, which are the primary hydrogen species involved in the reaction and affect the CHC of DPE. The experimental results can provide a reference for the conversion of lignite into clean liquid fuels.
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