Chemical Engineering and Processing-Process Intensification
·
2024
·
IF 3.8
Sitong Liu,Zhipeng Li,Kuihua Han,Yongzheng Wang,Shengli Niu,Jisen Liu,Jie Zhu,Yue Zheng
The basic active sites are rendered inactive by the free fatty acids (FFAs) in the feedstock. The aim of this study was to maximize the use of cheap and readily available waste cooking oil (WCO) and Sr-Zn oxide catalyst (prepared by sol-gel method) for biodiesel production. The best performing catalyst with a molar ratio of ZnO to SrO of 0.6 gave a biodiesel yield of 91.99 % even with the addition of 11 wt.% oleic acid. The morphology, crystal size and acid-base value of the Sr-Zn oxide catalysts were determined using various characterization methods. The results showed that the total basicity and acidity of the Sr-Zn oxide catalysts was 0.402 mmol/g and 0.367 mmol/g, respectively. After Zn doping, the specific surface area increased from 0.28 m 2 g −1 to 0.41 m 2 g −1 . The adsorption energy of acetic acid on the surface of Sr-Zn oxide was calculated to be the maximum of -268.9 kJ/mol based on the density functional theory. Zinc doping stimulated the C = O bond of acetic acid with the charges of 0.028 e. As a result, Sr-Zn oxide catalysts demonstrated acceptable activity and reusability, indicating bright futures for the heterogeneous catalyst-mediated manufacturing of biodiesel.
研究领域:
生物化学
·
催化化学
·
可再生能源
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DOI
高影响因子
MOLECULAR ECOLOGY
·
2023
·Vol. 32
·期 11
·2884-2897
·
IF 4.9
Jia-Xu Li,Zhong Tian,Xing-Feng Liu,Bei Li,Hao-Min An,Colin S. Brent,Jia-Lu Wang,Xiao-Ping Wang,Wen Liu
Many animals, including insects, exhibit plasticity of body colour in response to environmental changes. Varied expression of carotenoids, major cuticle pigments, significantly contributes to body colour flexibility. However, the molecular mechanisms by which environmental cues regulate carotenoid expression remain largely unknown. In this study, we used the ladybird Harmonia axyridis as a model to investigate the photoperiodic-responsive plasticity of elytra coloration and its endocrine regulation. It was found that H. axyridis females under long-day conditions develop elytra that are much redder than those under short-day conditions, resulting from the differential accumulation of carotenoids. Exogenous hormone application and RNAi-mediated gene knockdown indicate that carotenoid deposition was directed through the juvenile hormone (JH) receptor-mediated canonical pathway. Moreover, we characterized an SR-BI/CD36 ( SCRB ) gene SCRB10 as the carotenoid transporter responding to JH signalling and regulating the elytra coloration plasticity. Taken together, we propose that JH signalling transcriptionally regulates the carotenoid transporter gene for the photoperiodic coloration plasticity of elytra in the beetles, which reveals a novel role of the endocrine system in the regulation of carotenoid-associated animal body coloration under environmental stimuli.
研究领域:
昆虫学
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分子生物学
·
内分泌学
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DOI
PubMed
高影响因子
PLANT DISEASE
·
2023
·
IF 4.5
Miss Bairu Ren,Prof. Yi Wang,Dr. Huijie Chen,Mr. Lei Diao,Miss Jiaxin Wang,Miss Shuoyuan Zhang,Mr. Yongzhe Zhang,Prof. Meiping Zhang,Dr. Rui Yin,Dr. Yanfang Wang
Botrytis cinerea is a ubiquitous pathogen that can infect at least 200 dicotyledonous plant species including many agriculturally and economically important crops. In Ginseng, the fungus may cause ginseng gray mold disease, causing great economic losses in ginseng industry. Therefore, the early detection of Botrytis cinerea in the process of ginseng production is necessary for the disease prevention and control of the pathogen’s spread. In this study, a polymerase chain reaction-nucleic acid sensor (PCR-NAS) rapid detection technique was established, and it can be used for field detection of B. cinerea through anti-pollution design and portable integration. The present study showed that the sensitivity of PCR-NAS technology is 10 times higher than that of traditional PCR-electrophoresis, and there is no need for expensive detection equipment or professional technicians. The detection results of nucleic acid sensors can be read by the naked eye under 3 minutes. Meanwhile, the technique has high specificity for the detection of B. cinerea. The testing of 50 field samples showed that the detection results of PCR-NAS were consistent with those of the real-time quantitative PCR (qPCR) method. The PCR-NAS technique established in this study can be used as a novel nucleic acid field detection technique, and it has a potential application in the field detection of B. cinerea to achieve early warning of the pathogen infection.
研究领域:
植物病理学
·
分子生物学
·
农业科学
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DOI
PubMed
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 8
·1546-1555
·
IF 3.756
Ming Wang,Yunli Wang,Yue Tian,Yingchun Zhu
Sr doping in hydroxyapatite (HA) biomaterials has attracted continuous interest due to its well-known positive effects on bone formation. Investigating the effects of Sr on the HA crystal structure is of primary importance for understanding the underlying mechanisms of structure–property relationship. However, the effect of Sr on the HA crystal structure is still controversial and incomplete. Herein, the anisotropic effects of Sr doping on the HA crystal structure are determined by experimental, theoretical and simulative investigations. The good agreement of the results suggests that Sr preferentially replaces Ca(1) sites in the HA structure with a Sr content of 10 mol%, and causes significantly larger expansion in the c-axis direction than in the a-axis direction. The relative expansion rate in the c-axis direction is about 2.22 times that in the a-axis direction, which induces an increased aspect ratio of Sr-HA nanocrystals. When Sr replaces Ca(1) sites, the Sr–O bond length in the SrO6 configuration increases compared with that in Ca(1)O6, giving rise to the anisotropic lattice expansion due to the different projection lengths in different directions of this configuration. Moreover, reaction process investigations show that Sr is incorporated in HA by multi-step reactions from Sr-DCPD to Sr-DCPA and to Sr-HA. These findings shed new light on the anisotropic effect of Sr ions on the HA crystal structure, and provide a theoretical basis for development of ion-modified HA biomaterials.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
Optical Materials Express
·
2018
·Vol. 8
·期 6
·1425-1434
·
IF 2.566
Cong Pan,Jun-Cheng Zhang,Min Zhang,Xu Yan,Hong-Di Zhang,Yun-Ze Long,Xin-Yuan Sun,Hai-Tao Jiang
Isomorphic materials tend to exhibit differentiated performance due to the small differences between the constituent atoms and the crystal structures. Inspired by the isomorphic strategy, herein we developed a novel trap-controlled mechanoluminescent (TC-ML) material, Pr3+-activated Sr2Nb2O7, that shows mechanoluminescence (ML) under the mechanical actions of compression and friction. Compared to the isomorphic Ca2Nb2O7:Pr3+ which requires a long-time delay to achieve high-contrast ML due to the strong long-lasting afterglow, Sr2Nb2O7:Pr3+ enables the obtaining of high-contrast ML in a short-time delay because of the weak short-lasting afterglow, which greatly simplifies the imaging process to facilitate the further application of ML. The investigations of structural and optical characteristics between Sr2Nb2O7:Pr3+ and Ca2Nb2O7:Pr3+ reveal that the unique ML of Sr2Nb2O7:Pr3+ should result from its lower trap concentration and shallower trap depth relative to Ca2Nb2O7:Pr3+. Our results are expected to deepen our understanding on the behavioral diversity of isomorphic phosphors and thereby broaden the horizon of designing and regulating TC-ML materials.
研究领域:
材料科学
·
光学
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DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2021
·Vol. 331
·期 1
·511-522
·
IF 1.371
Liu Xiaonan,Miao Yulong,Luo Fen,Tang Hexi,Yuan Beilong,Zhao Yuanyuan,Xie Yi,Shao Dadong,Lu Xirui
The proper disposal of radioactively contaminated soil during the process of nuclear energy application has become the focus of attention. In this work, simulation Sr-contaminated soils could were successfully vitrified by microwave sintering. XRD and FESEM results show that the matrix has excellent glass morphology. The highest Vickers hardness and density values are 8.0 GPa and 3.10 g·cm −3 . The NR Sr after 14 days is less than 7.9 × 10 –4 g·m −2 ·d −1 , which shows the excellent chemical durability of glass. FT-IR and MD simulation results show that the matrix consists of [AlO 4 ] and [SiO 4 ]. Graphical abstract
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Jinfeng Mei,Siqi Mo,Hui Zhang,Xudong Zheng,Zhongyu Li
A carboxymethyl chitosan (O-CMC) gel was prepared by crosslinking and functionalizing with ethylenediaminetetraacetic acid (EDTA) using a one-pot reaction under mild conditions. Structural characterizations have revealed that the prepared O-CMC/EDTA gel has 3D porous structure with abundant carboxyl groups distributed in the pores. The prepared O-CMC/EDTA gel was used to adsorb Sr(II) ions in water while X-ray photoelectron spectroscopy (XPS) was used to explore the adsorption mechanism. In order to analyze the adsorption process, we performed the adsorption kinetics and isotherms. The results show that the maximum adsorption capacity of O-CMC/EDTA for Sr (II) ions is about 105.81 mg/g at pH = 7. Notably, it exhibited fairly high compression elasticity due to multiple hydrogen bonds in the network. The showed no deformation after 30 continuous compression cycles. The ratio of O-CMC:EDTA significantly influences the adsorption property by affecting the crosslinking degree as well as the number of active sites. The high adsorption capacity, elasticity, and reusability have demonstrated that the prepared material is an effective and promising adsorbent for Sr(II) removal.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
PubMed
高影响因子
Journal of Science-Advanced Materials and Devices
·
2026
·Vol. 11
·期 3
·101222
·
IF 6.9
Dongxu Pan,Han Zheng,Li Zheng,Ling Zhang,Zhengfa Li,Qin Shi,Zhengdao Chen,Pengxi Xu,Yuyan Li
Capacitors with dielectrics as media have drawn great attention for the energy-storage application of high-power electronic systems. Sodium niobate (NaNbO 3 ) is the famous antiferroelectric with more phases and phase transitions, but without perfect recoverable energy storage density W rec and efficiency η . Herein, the relaxor ternary NaNbO 3 -LaFeO 3 -Sr(Fe 0.5 Nb 0.5 )O 3 ceramics are constructed by employing domain and domain wall engineering for integrating the merits of relaxors and antiferroelectrics. The phase transforms from orthorhombic P bcm to P mmn, and relaxor characters are revealed by the rotations of domains and the movements of domain walls. Particularly important, 0.88NaNbO 3 -0.096LaFeO 3 -0.024Sr(Fe 0.5 Nb 0.5 )O 3 demonstrates the great properties of high W rec as 2.645 J/cm 3 and super η as 80.7% at 230 kV/cm, less than the large electric breakdown strength E b of 235 kV/cm. These results suggest that NaNbO 3 -based ceramics are suitable for advanced capacitors, and the feasible strategy of domain and domain wall engineering is developed to provide novel energy storage dielectrics.
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产品关联
DOI
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Zi Wang,Yimin Du,Shunlin Zhang,Hongliang Li,Jinghong Yang,Jiyuan Yan,Zhong Li,Jinhui Liu,Juncai Liu
Background: Titanium (Ti) implants are mechanically reliable but lack osteoinductivity. Calcium silicate (CaSiO3) coatings improve bioactivity but degrade rapidly. Strontium (Sr), a bone-regulating ion, enhances osteoblast function and suppresses bone resorption. Incorporating Sr into CaSiO3 may synergistically improve coating stability and osteogenic performance.Objective: To develop Sr-doped CaSiO3 coatings with varying Sr concentrations and evaluate their effects on osteogenesis, identifying the optimal formulation for Ti surface functionalization.Methods: Sr-CaSiO3 powders (0.05, 0.10, 0.20 mol Sr) were synthesized by sol-gel and applied to Ti via electrophoretic deposition. The morphology and composition of the coating were analyzed using XRD, SEM, and EDS, and its effects on osteoblast-like cells (MC3T3-E1) proliferation, differentiation, mineralization, and Wnt/β-catenin pathway activation were evaluated.Results: The 0.10 mol Sr group exhibited optimal surface structure and Ca/P ratio (1.73). It significantly enhanced ALP expression, calcium nodule formation, and β-catenin nuclear translocation (p < 0.001), indicating superior osteogenic induction.Conclusion: Sr-doped CaSiO3 coatings enhance osteogenesis in a dose-dependent manner. The 0.10 mol Sr concentration provides the best combination of structural stability, osteoinductive capacity, and long-term bioactivity. These findings highlight the potential of Sr-doped CaSiO3 coatings as a promising surface modification strategy to improve the integration and clinical success of Ti implants in bone repair and regenerative medicine.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 9
·14038-14047
·
IF 3.83
Huanyu Zhang,Rui Li,Mei Zhang,Min Guo
By using a two-step spin-coating method, 10 mol% SrI 2 and 10 mol% SrCl 2 -substituted perovskite films were synthesized and utilized to construct mesoscopic perovskite solar cells (PSCs), respectively. The influences of Sr substitutions on the humidity and thermal stability of PSCs were systematically investigated. It is indicated that both 10 mol% SrI 2 substitution and 10 mol% SrCl 2 substitution can enhance the power conversion efficiency (PCE) of PSC to more than 15%. The 10 mol% SrCl 2 substitution can improve the humidity resistance of perovskite films, which is conducive to inhibiting the increase of perovskite's defect density caused by humidity. After storing at 20 ± 5 °C, 30 ± 5%RH for 21 d, the 10 mol% SrCl 2 -substituted PSC can still maintain 84% of the initial efficiency. However, the 10 mol% SrI 2 -substituted PSC exhibits a strong humidity sensitivity, which results in the increase of series resistance and the decrease of recombination impedance, thus making the PCE decrease to less than 20% of the initial value after storing at 20 ± 5 °C, 30 ± 5%RH for 21 d. As for the thermal stability of PSCs, both the 10 mol% SrI 2 and 10 mol% SrCl 2 -substituted perovskite films exhibit a certain thermal resistance. After 18 thermal cycles, both the 10 mol% SrI 2 and 10 mol% SrCl 2 -substituted PSCs can maintain over 90% of the initial PCEs.
研究领域:
材料科学
·
光伏技术
·
可再生能源
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Shuqin Chang,Jipeng Fu,Xuan Sun,Guangcan Bai,Guoquan Liu,Kaina Wang,Ligang Xu,Qi Wei,Thomas Meier,Mingxue Tang
Ce3+-doped SrS phosphors with a charge-compensating Na+ addition were successfully synthesized via a solid-state reaction method, and the related X-ray diffraction patterns can be indexed to the rock-salt-like crystal structure of the Fm3̅m space group. SrS:(Ce3+)x (0.005 ≤ x ≤ 0.05) and SrS:(Ce3+)0.01,(Na+)y (0.005 ≤ y ≤ 0.030) phosphors were excited by 430 nm UV-Vis light, targeted to the 5d1 → 4f1 transition of Ce3+. The composition-optimized SrS:(Ce3+)0.01, (Na+)0.015 phosphors showed an intense broad emission band at λ = 430–700 nm. The doping of Na+ was probed by solid-state nuclear magnetic resonance. The 430 nm pumped white light-emitting diode structure fabricated with a combination of SrS:(Ce3+)0.01,(Na+)0.015 and Sr2Si5N8:Eu2+ phosphors shows a color-rendering index (Ra) of 89.7. The proposed strategy provides new avenues for the design and realization of novel high color quality solid-state LEDs.
研究领域:
材料科学
·
光电技术
·
固态照明
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Electronic Materials Letters
·
2022
·Vol. 19
·期 2
·201-211
·
IF 3.151
Zhang Yanting,Cai Cheng,Chen Tao,Wu Chonggang,Gong Xinghou,Hong Jiang,Hu Tao
As microelectronics technology advances and develops, issues such as heat management and reliability of electronic components will become more exposed. Here, this paper explored a green biomass modification method for preparing composites with both good thermal conductivity and dielectric properties. Namely, boron nitride (BN) was first surface coated with the copolymerization product of tea polyphenols and theophylline, both of which can be extracted from tea leaves. Then, through solution blending the coated-BN (BN@TPP) with silicone rubber (SR), the BN@TPP/SR composites were obtained. Owing probably to the coated layer, BN@TPP were more evenly dispersed within the SR matrix, which effectively reduced the interfacial thermal resistance and improved the thermal conductivity of composites. The thermal diffusion coefficient and thermal conductivity of 40 wt% BN@TPP/SR composites reached 0.216 mm 2 /s and 0.462 W/mK, which are higher than BN/SR composites (0.155 mm 2 /s, 0.349 W/mK), respectively. Meanwhile, the 40 wt% BN@TPP/SR composite maintained dielectric constant (3.9 at 1 kHz) and low dielectric loss (0.005 at 1 kHz). In conclusion, this green biomass modification method not only provides a simple and environmentally friendly modification method for BN, but also offers a novel idea that can be applied to the practical preparation of thermally conductive materials for electronic devices. Graphical Abstract
研究领域:
材料科学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）