CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Xiaocui Rao,Xueting Fu,Hai Jiang,Weiping Li,Laihui Luo
In this work, the cold sintering assisted process was utilized to fabricate dense 0–3 type (1- x )BaTiO 3 - x CaTiO 3 :Pr 3+ ((1- x )BT- x CT:Pr 3+ , x = 0.1, 0.2 and 0.3) binary composite ceramics. Under the combined action of uniaxial pressure and temperature, CT:Pr 3+ has been successfully integrated with BT to form the preliminary BT-CT:Pr 3+ composites during cold sintering. It is found that the cold sintering could increase the grain size a little, and annealing at 900 °C significantly promotes the grain size. The prepared (1- x )BT- x CT:Pr 3+ composite ceramics have a pure phase of CT:Pr 3+ , which is difficult to prepare using high temperature solid reaction method when x < 0.23. It is found that all the composite ceramics exhibit excellent ferroelectric properties . Furthermore, a strong photoluminescence , photo-stimulated luminescence and thermal luminescence properties have been obtained. Present study illustrates a potential approach to combine luminescent and piezoelectric properties into the ferroelectric-based composite ceramics by the cold sintering assisted sintering.
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BRAIN RESEARCH BULLETIN
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2022
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IF 3.715
Xiaohui Xia,Shuai Wang,Lirong Wu,Guoxing Li,Kaiwen Hou,Anyong Yu,Zhao Yang
Background Intracerebral hemorrhage (ICH) is a serious disease with high mortality and morbidity, and effective treatment is limited. A large amount of evidence suggests that the inflammatory response contributes to secondary brain damage following ICH. TIPE2 is an essential negative regulator of both innate and adaptive immunity, and depletion of TIPE2 causes inflammatory disease. However, the possible role of TIPE2 following ICH has not been reported. Methods In this study, we investigated TIPE2 levels and inflammation in microglia treated with erythrocyte lysate in vitro. In addition, we analyzed the role of Bcl-2/Bax/cleaved caspase-3 apoptotic pathways in ICH mice. Furthermore, we observed proinflammatory cytokine production, BBB disruption, cerebral water content and neurological damage in ICH mice. Results We found that TIPE2 levels were significantly decreased in erythrocyte lysate-treated microglia compared to control microglia.Upregulation of TIPE2 decreased microglia activation and cytokine production and accelerated brain damage in ICH mice. Furthermore, upregulation of TIPE2 decreased the higher ratio of Blc-2/Bax and increased cleaved caspase-3 levels in ICH mice. In addition, upregulation of TIPE2 attenuated proinflammatory cytokine production, BBB disruption, and severe brain inflammation after ICH. Conclusion These results demonstrated that TIPE2 was negatively correlated with the pathogenesis of ICH, which prevented brain injury and attenuated deleterious inflammatory responses following ICH. TIPE2 might serve as a novel target for ICH therapy.
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Current Research in Food Science
·
2022
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IF 6.269
Yang Lin,Cong Li,Ping Shao,Ligang Jiang,Bilian Chen,Mohamed A. Farag
Anthocyanins (ACNs) as one category of water-soluble flavonoid pigments are increasingly employed in pH sensing indicator applications for monitoring food freshness. Nevertheless, considering that anthocyanins are sensitive to environmental factors, their practical applications in food industries are still rather limited. In order to improve the stability of anthocyanins and capitalize upon their application in pH-color responsive intelligent packaging, this study aims to graft octanoic aid onto raspberry anthocyanins catalyzed by immobilized Candida antarctica lipase B (Novozymes 435). Structural analyses based on Fourier transform infrared spectroscopy (FTIR), UV–Vis, liquid chromatography-mass spectrometry (LC-MS), and nuclear magnetic resonance (NMR) revealed that octanoic acid was regioselective grafted onto the 6-OH position of its glucoside. The acylation efficiency of C3G by octanoic acid up to 47.1%. The octanoic acid moiety was found to improve lipophilicity, antioxidant activity and stability of C3G. In addition, acylated derivative also maintained the pH-color response characteristics of nature ACNs and exhibited excellent NH 3 response properties. These results indicated that acylated anthocyanins exhibit potential application as intelligent packaging indicator for monitoring food freshness.
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PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2022
·Vol. 39
·期 9
·2200073
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IF 3.467
Hengbin Mao,Lei Wang,Junhui Li,Xin Jiang,Shiwei Xue,Mingliang Li,Jinpeng Zhu,Bingbing Fan,Tingting Xu,Gang Shao,Hongliang Xu,Hailong Wang,Rui Zhang,Hongxia Lu
All-inorganic perovskite nanocrystals (NCs) have been widely used in many fields due to their excellent photoelectric properties. However, the instability of their structure and the high lead content need to be solved. Herein, the concept of “High-entropy” is introduced into NCs to prepare High-entropy perovskite Cs(Pb 1/3 Mn 1/3 Ni 1/3 )Br 3 NCs by high-energy ball milling method. The effects of milling time and doping ratio of B-site elements on the structure and performance of perovskite NCs are studied. It is found that Mn 2+ and Ni 2+ successfully enter the lattice of Pb 2+ to form “High-entropy” perovskite NCs. In addition, compared with Cs(Pb 0.72 Mn 0.14 Ni 0.14 )Br 3 NCs, Cs(Pb 1/3 Mn 1/3 Ni 1/3 )Br 3 NCs have greater luminous intensity and stability, which because of the enhancement of band gap and valence bonds. Furthermore, photoluminescence intensity at 515 nm increase obviously when Cs(Pb 1/3 Mn 1/3 Ni 1/3 )Br 3 NCs are heated at 120 °C. This is due to the lattice distortion effect brought about by ion doping. This study is expected to provide an effective way for synthesis and stability of all-inorganic perovskite NCs doped with more kinds of different ions. Moreover, it also lays the foundation for the introduction of “High-entropy” into perovskite functional ceramics.
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FUEL
·
2022
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IF 8.035
Guang-Bin Ye,Zi-Hao Qin,Xiao-Yun Bin,Jin-Hua Mou,Carol Sze Ki Lin,Hong-Ye Li,Xiang Wang
Due to its high lipid accumulation capability, Phaeodactylum tricornutum has attracted considerable attention as a promising candidate for biofuel production. However, the derived lipid cannot satisfy the industrial biofuel manufacturing requirements given its poor fatty acid characteristics. Genetic engineering, as a prospective approach, has been employed to overcome this bottleneck. Relevant research indicates that the fabG gene plays a crucial role in fatty acid biosynthesis in bacteria, but its significance in microalgae remains unclear. In this study, FabG was successfully introduced, transcribed, and overexpressed in P. tricornutum . FabG overexpression significantly enhanced lipid (1.49-fold) and fatty acid (1.31-fold) biosynthesis without altering growth and photosynthesis, and this method thus exhibits great potential in high-quality biodiesel production. Moreover, increased saturation of fatty acids (e.g., C16:0) and improved antioxidative activities enhanced the tolerance of transgenic P. tricornutum to high temperature stress. To conclude, this study reports a feasible approach for high-quality algae-based biofuel production via the unprecedented roles of FabG retrieved from diatom.
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ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Zheng Li,Yong Shen,Zhibo Li
The chemical recycling of plastic wastes into value-added products is an attractive strategy to reduce the consumption of fossil fuels and reduce the plastic pollution. We report here the facile upcycling of poly(3-hydroxybutyrate) (P3HB) into value-added polymerizable monomers and subsequent polymerization toward degradable and recyclable polymers. The bicyclic monomer 4-methyloctahydro-2H-benzo[b][1,4]dioxepin-2-one (4-MOHB) was first synthesized from P3HB through efficient steps. The obtained monomers underwent bulk ring-opening polymerization (ROP) catalyzed by stannous octoate (Sn(Oct)2) to give the amorphous materials. With benzyl alcohol (BnOH) as an initiator, Sn(Oct)2 can effectively catalyze the ROP of bicyclic ether–ester monomers in a controllable fashion. Moreover, poly(4-methyloctahydro-2H-benzo[b][1,4]dioxepin-2-one) (P(4-MOHB)) showed a closed-loop recovery property due to the fused bicyclic monomer structure. The selective depolymerization of the P(4-MOHB) homopolymer back to 4-MOHB monomer can be easily realized using p-toluenesulfonic acid (TsOH) or Sn(Oct)2 as a catalyst in solution or in bulk. This strategy to recycle bioplastics into value-added materials has a promising application prospect and is beneficial to extend the life cycle of environment-friendly materials.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Xiang Gong,Li Tang,Ruixiang Wang,Zhenghong Guo,Pengling Huang,Li Zhou,Jie Zou,Jia Lei,Huanhuan Liu,Nan Li,Xingrui Tang,Wenkun Zhu,Rong He
As an important strategic resource and environmental pollutant, uranium has high toxicity and economic value. Photocatalytic reduction of soluble hexavalent uranium (U(VI)) is a green and economic method to achieve uranium extraction, whereas the reported photocatalyst commonly requires a long period of > 1 h to reach a high extraction efficiency (>90%). Herein, we reported the ultrafast photocatalytic uranium extraction by up-conversion Er doped ZnO nanosheets . In the initial U(VI) concentration of 200 mg/L, the Er doped ZnO with 4% doping level (Er 0.04 -ZnO) nanosheets achieved 91.8% within 3 min, which was at least a magnitude shorter relative to ever-reported materials. The Er 0.04 -ZnO nanosheets reached a high removal efficiency of 96.1% in 10 min, with a considerable U(VI) extraction capacity of 3036 mg/g. The mechanistic study showed that the Er doping induced the up-conversion properties and increases the carrier density, thus enhancing the light adsorption and accelerating the U(VI) extraction.
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APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2022
·Vol. 88
·期 6
·
IF 5.005
Zihao Liu,Kun Wang,Xuemei Nan,Meng Cai,Liang Yang,Benhai Xiong,Yiguang Zhao
3-Nitrooxypropanol (3-NOP) is effective at reducing ruminal methane emissions in ruminants. But it also causes a drastic increase in hydrogen accumulation, resulting in feed energy waste. Fumarate is a key precursor for propionate formation and plays an important role in rumen hydrogen metabolism. Therefore, this study examined the effects of 3-NOP combined with fumarate on volatile fatty acids, methanogenesis, and microbial community structures in dairy cows in vitro. The in vitro culture experiment was performed using a 2-by-2 factorial design, two 3-NOP levels (0 or 2 mg/g dry matter [DM]) and two fumarate levels (0 or 100 mg/g DM), including 3 runs with 4 treatments, 4 replicates, and 4 blanks containing only the inoculum. Rumen fluid was collected from three lactating Holstein cows with permanent ruminal fistulas. The combination of 3-NOP and fumarate reduced methane emissions by 11.48% without affecting dry matter degradability. The propionate concentration increased and the acetate/propionate ratio decreased significantly. In terms of bacteria, the combination of 3-NOP and fumarate reduced the abundances of Ruminococcus and Lachnospiraceae_NK3A20_group and increased the abundances of Prevotella and Succiniclasticum. For archaea, the combination of 3-NOP and fumarate significantly increased the abundances of Methanobrevibacter_sp._AbM4, while the abundance of operational taxonomic unit 581 (OTU581) (belonging to an uncultured_rumen_methanogen_g__Methanobrevibacter strain) was significantly decreased. These results indicated that the combination of 3-NOP and fumarate could alleviate the accumulation of hydrogen and enhance the inhibition of methanogenesis compared with 3-NOP only in dairy cows.IMPORTANCE The global problem of climate change and the greenhouse effect has become increasingly severe, and the abatement of greenhouse gases has received great attention from the international community. Methane produced by ruminants during digestion not only aggravates the greenhouse effect but also causes a waste of feed energy. As a methane inhibitor, 3-nitrooxypropanol can effectively reduce methane emissions from ruminants. However, when it inhibits methane emissions, the emission of hydrogen increases sharply, resulting in the waste of feed resources. Fumarate is a propionic acid precursor that can promote the metabolism of hydrogen to propionic acid in animals. Therefore, we studied the effects of the combined addition of 3-nitrooxypropanol and fumarate on methanogenesis, rumen fermentation, and rumen flora. It is of great significance to inhibit methane emission from ruminants and slow down the greenhouse effect.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Yang Li,Kejia Liu,Long Meng,Yong Wang
The solubility of methyl 1,2,4-triazole-3-carboxylate in 14 solvents (methanol, ethanol, 1-propanol, 2-propanol, 1-butanol, isobutyl alcohol, acetonitrile, acetone, 2-pentanone, 3-pentanone, 4-methyl-2-pentanone, cyclopentanone, cyclohexanone, tetrahydrofuran) in the range from 278.15 to 318.15 K and at atmospheric pressure was measured in this study. The solubility of methyl 1,2,4-triazole-3-carboxylate in all solvents increases with the increasing temperature. The solubility of methyl 1,2,4-triazole-3-carboxylate in the solvents except for methanol and cyclohexanone does not show much difference, and is significantly smaller than that in methanol and cyclohexanone. The solubility of methyl 1,2,4-triazole-3-carboxylate is not strictly related to polarity of the solvents as it is to the existence of other factors. The solubility of methyl 1,2,4-triazole-3-carboxylate was correlated by the λh equation, modified Apelblat model, and Yaws model. The Yaws model is the best one among the three models with average relative deviation (ARD) and average root-mean-square deviation (104(RMSD)) of 1.18% and 0.364. The work in this study provides important solubility data for purification and synthesis of methyl 1,2,4-triazole-3-carboxylate.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Ziteng Wang,Yanjuan Peng,Xinxin Cheng,Jingjing Yang,Bin Zhou,Li Mi,Yonghong Hu
In this work, the dissolution behavior of a novel pharmacological factor, 3-methylflavone-8-carboxylic acid (MFCA) in different solvents was studied. Firstly, the solubility of MFCA in ten mono-solvents (acetonitrile, tetrahydrofuran, acetone, N,N-dimethylformamide, methyl acetate, ethyl acetate, butyl acetate, methanol, ethanol and isobutanol) and three binary solvents (N,N-dimethylformamide + acetonitrile, tetrahydrofuran + acetonitrile, methyl acetate + acetonitrile) at different temperatures (273.15–323.15 K) was determined by static equilibrium-high performance liquid chromatography. The experimental results showed that the solubility of MFCA increased with increasing temperature in tested solvents, and the solubility of MFCA in N,N-dimethylformamide was maximal. The Hansen solubility parameter was used to research the dissolution behavior of MFCA. Meanwhile, the solvent effect was discussed by KAT-LSER model in ten mono-solvents, and it was found that the hydrogen bond basicity and nonspecific dipolarity/polarizability were favorable to the dissolution of MFCA. In addition, modified Apelblat model, λh model, CNIBS/R-K model and Jouyban-Acree model were used to analyze the correlation and evaluate the applicability for the experimental solubility data of MFCA. The calculated data showed that modified Apelblat model and CNIBS/R-K model are the best models for mono and binary solvents, respectively. Finally, the dissolution thermodynamic properties of MFCA were studied by van't Hoff analysis, indicating that the dissolution of MFCA was an endothermic and entropic driven process. To sum up, these experimental results could provide pretty reference for purification and crystallization optimization of MFCA, and realize the industrial large-scale production of various drugs such as diuretic.
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MARINE POLLUTION BULLETIN
·
2022
·
IF 7.001
Kokoette Effiong,Jing Hu,Caicai Xu,Yiyi Zhang,Shumiao Yu,Tao Tang,Yuzhou Huang,Yongliang Lu,Wei Li,Jiangning Zeng,Xi Xiao
Harmful algal blooms (HABs) have induced severe damage worldwide. A novel high-efficient antialgal natural chemical, 3-indoleacrylic acid (3-IDC) with a 5-day half-maximal inhibitory concentration (IC 50, 5d ), was discovered from canola straw, and its algal inhibition mechanism was investigated. Adverse effects were observed on the growth of P. donghaiense with 3-IDC addition, following an increase in reactive oxygen species (ROS) production. 3-IDC also hindered the photosynthetic mechanism of P. donghaiense cells. Transcriptional results showed 3-IDC inhibiting the functions of all the nutrient assimilating genes, down-regulated ribulose-1,5-bisphosphate carboxylase/oxygenase II, and cytochrome f genes. The expression of heat shock protein ( HSP ) 70 and 90 and rhodopsin genes were also suppressed. The binding affinity of investigated receptors was observed. The conformational changes induced by the spatial microstructural alteration through 3-IDC may further contribute to the perturbation of those enzyme catalytic activities. The present results provide new insights on controlling HABs using 3-IDC.
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ACS Omega
·
2022
·
IF 4.132
Jinyu Xie,Kai Gu,Yan Zhao,Jinrong Yao,Xin Chen,Zhengzhong Shao
Here, the high-strength, high-ductility blends of poly(lactic acid) (PLA) with epoxidized soybean oil (ESO) and 3-aminophenylboronic acid (APBA) were successfully prepared via a melt-bending method. The effects of APBA addition on the mechanical and thermal properties, morphologies, and crystallization behavior of the blends were investigated. The results showed that the addition of APBA endowed the PLA/ESO/APBA blends with a good balance of strength and toughness. The yield strength of the PLA/ESO/APBA (90:10:3) blend was 70 MPa, which was 25% higher than that of the corresponding PLA/ESO blend without APBA (56 MPa), while its elongation at break reached 160%, which is greatly superior to that of pure PLA (6.5%). Scanning electron microscopy images showed that the incorporation of APBA significantly improved the compatibility between PLA and ESO, while gel permeation chromatography and rheological analysis suggested the occurrence of complex reactions between the three constituents, which improved the compatibility between PLA and ESO and enhanced the mechanical properties of the blends. Hence, the PLA/ESO/APBA blends possess great potential for application in the manufacture of environmentally friendly degradable plastics.
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