CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xuejian Liu,Junjie Ren,Daoyi Chen,Zhenyuan Yin
The continuously increasing CO 2 emissions since industrialization has sparked widespread concerns on environmental and climate change issues. Carbon sequestration and storage technologies (e.g., hydrate-based CO 2 sequestration) present promising potential for the disposing of excessive CO 2 in geological media. High gas uptake capacity and rapid CO 2 hydrate formation kinetics are required for the application of such a technology. In this study, we compared the kinetic promotion effects of sodium dodecyl sulfate (SDS) and L -methionine ( L -Met) on CO 2 hydrate with the objective of identification of an effective and eco-friendly CO 2 hydrate kinetic promoter. The experimental results suggested that L -Met (0.1 wt%) promotes CO 2 hydrates formation significantly with a gas uptake in CO 2 hydrate five times more than SDS at the same concentration. The hydrate morphology observations indicated that the wall-climbing hydrates associated with the addition of L -Met induced by the capillary driving force offer a possible explanation for the difference in the observed kinetics. A novel calculation method was developed to quantify the partition of CO 2 in gas, liquid and hydrate phases. Increasing the initial gas–liquid ratio promotes CO 2 stored in the hydrate phase as solid rather than in the liquid phase as dissolution. We further demonstrated the reusability of L -Met in five consecutive cycles of CO 2 hydrate formation and dissociation. It was assessed that L -Met as a CO 2 hydrate kinetic promoter is superior to SDS and can be employed as an efficient, reliable and eco-friendly kinetic promoter for the hydrate-based CO 2 sequestration technology.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Zhenhua Zhang,Yangyang Cao,Jieru Wan,Yanli Wang,Rongrong Chen,Rumin Li,Dalei Song,Tao Zhang,Jingyuan Liu,Jun Wang
Nanocontainers loaded with corrosion inhibitors as fillers can endow the organic coating with self-healing abilities. However, the number of nanocontainers that can be added to the coating is limited, and the number of corrosion inhibitors that can be accommodated by the nanocontainers is also limited. These considerably mitigate the anti-corrosion properties of the self-healing coating. Herein, a self-healing double-layered composite coating (MK-VK/EP), l -methionine (L-met)-loaded dendritic silica (KCC-1) nanocontainers modified epoxy coating (EP) as the bottom layer (MK/EP) and vanillin (Van)-loaded KCC-1 modified EP as the top layer (VK/EP), was fabricated on the surface of carbon steel. The results of electrochemical impedance spectroscopy (EIS) show that the low frequency impedance modulus (|Z| 0.01Hz ) of MK-VK/EP is nearly two orders of magnitude higher than that of MK/EP or VK/EP in 3.5 wt% NaCl solution after 45 days. Furthermore, the self-healing rate (r self-healing ) of the scratched MK-VK/EP coating (S-MK-VK/EP) is still much higher than that of the scratched MK/EP or VK/EP in the last two stages of immersion. Meanwhile, there exists no apparent corrosion after 12 h of immersion from the optical image of S-MK-VK/EP. The results show that MK-VK/EP can provide better self-healing corrosion protection performance than the single coating (MK/EP or VK/EP). Hence, the synergistic effect of different corrosion inhibitors can greatly improve anti-corrosion abilities of the coating, which will provide an effective approach for corrosion protection of metal in marine environment.
研究领域:
材料科学
·
腐蚀与防护
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 20
·9595-9601
·
IF 3.925
Hongbo Wu,Yingjie Xu,Ruyan Xie,Mingyu Tang,Lihua Chen,Fengyu Qu,Changhong Guo,Fang Chai
Facile and accurate detection of dopamine (DA) in biological samples is crucial for diagnostic needs. This study reports a portable colorimetric fluorescent probe for the tracing of DA based on orange-red emitting Au nanoclusters (AuNCs). The AuNCs were reduced and stabilized with L-methionine by strictly controlling the reaction conditions. The resultant L-methionine capped AuNCs (M-AuNCs) exhibit bright and stable orange-red emission with a quantum yield of 31.08%. The excitation/emission wavelength is located at 420 nm/610 nm, and the large Stoke's shift of 190 nm endows the M-AuNCs with great potential as a late-model sensing probe for life studies and environmental science. The M-AuNCs exhibit unique specificity and excellent sensitivity for tracing DA by an “on–off” strategy with a lower limit of detection (LOD) of 3.96 nM (S/N = 3) within a linear range of 10–100 nM. Notably, the colorimetric detection results can be explored as a visual sensor for sensitive, reliable and real-time/on-site detection of DA with the assistance of a smartphone. The LOD can be determined as 81.94 nM within a wide linear range of 0.1–1.0 μM by a smartphone. Furthermore, the M-AuNCs as a late-model potable probe allow simple and rapid discrimination of DA in serum, and the cellular imaging of the M-AuNCs indicated that the detection of DA can also be achieved in living cells, demonstrating their great feasibility for the tracing of DA in real samples.
研究领域:
生物化学
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分析化学
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纳米科学
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医学诊断
✓ 已验证
产品关联
DOI
高影响因子
Journal of Fungi
·
2024
·Vol. 10
·期 2
·151
·
IF 4.2
Xianran Zhu,Shaoying Zhang,Youwei Yu,Shengwang Li,Chao Yang,Yuan Chang
Alternaria alternatais the main pathogenic fungus of postharvest black spots in fruits and vegetables. This study aimed to explore the antifungal activity of methionine onA. alternatain vitro and to reveal related antifungal mechanisms through a metabolomics analysis. The results showed that the inhibitory effects of L-methionine (Met) treatment on mycelium growth, spore germination, and the germ tube elongation ofA. alternatawere enhanced with an increase in the Met concentration, but the inhibitory effects decreased when the Met concentration was higher than 50 mmolL−1. The results of propidium iodide staining and scanning electron microscopy showed that the Met treatment damaged the plasma membrane integrity of theA. alternataspores and caused an irreversible deformation of mycelium. In addition, after the Met treatment, the leakage of electrolytes, nucleic acid, and proteins in theA. alternatacells was significantly higher than that in the control group, indicating that the Met treatment increased the permeability of the cell membranes. Eighty-one different metabolites, divided into seven categories, were identified through the metabolomics analysis, including forty-three downregulated metabolites and thirty-eight upregulated metabolites. Among them, these differential metabolites were mainly involved in amino acid synthesis and metabolism, the pentose phosphate pathway, and the TCA cycle. Therefore, the antifungal effect of the Met treatment onA. alternatawas mainly to damage the integrity of the cell membranes, make nucleic acid and protein contents leak, and affect the TCA cycle, carbohydrate metabolism, amino acid synthesis metabolism, and the metabolic pathways associated with cell membrane biosynthesis. Thus, the growth and development ofA. alternatawere inhibited. The research enriched the investigation of the effect of the antifungal mechanism of Met treatment onA. alternataand provided a theoretical basis for the application of Met to prevent and treat postharvest black spots in fruits and vegetables.
研究领域:
植物病理学
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食品科学
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微生物学
✓ 已验证
DOI
PubMed
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Xiaohe Miao,Xiaoyuan Duan,Huatao Cheng,Haoyu Duan,Zhiyi Zhang,Yaqing Liu,Shuaishuai Cheng
The dispersibility of fillers and interfacial interaction are crucial for polymer nanocomposites. Developing a simple, efficient and green method to simultaneously reduce and functionalize graphene oxide (GO) for preparing graphene/rubber composites with excellent dispersibility and enhanced interfacial interactions remains one of the main trends in developing and expanding the application of graphene in the rubber industry. In this work, VOC (volatile organic compound) -free and environmentally friendly L-methionine (L-Met) was selected as the functional modifier of GO. Then, L-Met-modified GO (MGO) was blended with natural rubber (NR) in an aqueous phase to prepare MGO/NR composites. The amphiphilic property of L-Met not only reduced GO but also endowed it with less agglomeration and excellent water dispersibility, which was a prerequisite for achieving uniform dispersion of GO in the NR matrix. In addition, the amino acids on the surface of MGO enhanced the compatibility between GO and the protein-phospholipid layer on the outer layer of NR latex particles. Meanwhile, L-Met containing sulfur bonds promoted rubber vulcanization, resulting in the formation of a cross-linked network between the modified GO and NR molecular chains. Compared to unmodified GO/NR composites, MGO/NR composites exhibited excellent mechanical properties and low heat build-up. More importantly, the solid tire prepared by using L-Met as the interface modifier for GO filled rubber showed lower rolling resistance and temperature rise, and the energy saving efficiency was improved. This strategy is expected to provide a new insight into the green production of organically modified graphene and the preparation of low-energy-consumption green graphene tires.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2025
·
IF 2.8
Huimin Han,Qingjing Niu,Kongying Zhu,Xiaoyan Yuan,Lixia Ren
Amphiphilic copolymers are reported to show excellent ice control activity for their special interaction with ice and water. In this work, amphiphilic L-methionine sulfoxide and L-alanine copolymers (MSACPs) with different block ratios (PMeto48-b-PAlay), different molecular weights and random (P(Meto48-co-Ala20)) structures are prepared, respectively, to study the structure and ice control activity relationship. The ice control activity is well studied using ice nucleation, dynamic ice shaping (DIS) and ice recrystallization inhibition (IRI). The MSACPs are self-assembled into micelles of 11 to 80 nm in aqueous solution, which promotes the heterogeneous ice nucleation. Among block copolymers with different block ratios (PMeto48-b-PAlay) and molecular weights, PMeto48-b-PAla20 with an appropriate block ratio and molecular weight shows the highest nucleation temperature (−18.2 °C), and excellent DIS and best IRI (the mean largest grain size is 34%) activities. And, for the block copolymers with a similar block ratio to that of PMeto48-b-PAla20, the DIS and IRI are closely related to the molecular weight as the ice control property is enhanced at high molecular weight. Compared with PMeto48-b-PAla20, the corresponding random copolymer, P(Meto48-co-Ala20), shows weaker ice control activity. Meanwhile, low-field nuclear magnetic resonance results show that the polymer–water interaction increases with hydrophobic block ratio, but has less effect on the molecular weight. The ice control activity is probably related to the balance between the polymer–water interaction and the polymer–ice interaction, and is optimized by both strong interactions.
研究领域:
生物化学
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材料科学
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低温生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
·
2019
·
IF 2.813
Neng Xiong,Ru Yu,Tao Chen,Ya-Ping Xue,Zhi-Qiang Liu,Yu-Guo Zheng
Methionine is an essential sulfur-containing amino acid for organisms. The separation and purification are important for the production of l -methionine from fermentation broth. In this work, the adsorption properties for l -methionine separation of ten macroporous resins were firstly evaluated. Macroporous cation resin D72 showed the best adsorption capacity (52.37 mg/g) and desorption rate (99.12%). The adsorption kinetics of l -methionine on D72 resin followed the pseudo second-order model and adsorption isotherm fitted well to the Sips model, the adsorption process mainly followed a physisorption mechanism. D72 resin packed columns were then used in the batch separation of fermentation broth, the operation parameters were optimized during the dynamic adsorption and desorption experiments. Under the optimized conditions: fermentation broth adjusted to pH = 2, loading flow rate at 2 BV/h, loading volume 55 mL, 1 mol/L NH 3 ·H 2 O as eluent , elution flow rate at 2 BV/h, column height-diameter ratio at 14:1, excellent recovery and purity of l -methionine (82.37% and 85.69%, respectively) could be achieved.
研究领域:
生物工程
·
生化分离技术
✓ 已验证
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
Yongtao Zhang,Fulin Chen,Yan He,Fei Wang
CO 2 sequestration based on hydrate technology is considered to be the most promising long-term CO 2 sequestration technology. In this study, a method of using initial stirring to activate CO 2 hydrate formation process was proposed in the aim of saving energy and avoiding the problem of stirring shaft stuck, where the stirring only played a role in activating hydrate formation process. Two amino acids, l -Methionine and d -leucine, were chosen as promoters for improving the formation kinetics of CO 2 hydrates, and l -Methionine presents better than d -leucine. When the concentration of l -methionine solution is equal to or greater than 4 mmol/L, even with the initial stirring of 10 rpm within 8 min, T 90 can be shortened to close to or less than 40 min with a high gas consumption of more than 7.3 mmol gas/mL water, where the promoting effect is similar to the condition of continuous stirring of about 100 min, indicating that about 90 % of the energy consumed for mechanical stirring can be saved. Moreover, an interesting phenomenon was observed that CO 2 hydrates firstly nucleated inside the l -methionine solution, and a large number of small hydrate floccules rapidly formed and filled the entire solution under the action of magnetic stirring, which proved the instantaneous excitation effect of stirring on hydrate formation. This work contributes to rethinking the promoting roles of stirring and promoters in CO 2 hydrate formation.
研究领域:
环境科学
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能源化学
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物理化学
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气体水合物
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碳捕集与封存
✓ 已验证
DOI
高影响因子
ADVANCED SYNTHESIS & CATALYSIS
·
2023
·Vol. 365
·期 7
·1048-1057
·
IF 5.4
Xiao-Ling Tang,Ning Li,Yan-Lai Liu,Jing-Peng Li,Kai-Xuan Zhao,Zhi-Qiang Liu,Yu-Guo Zheng
L-Methionine is the unique sulfur-containing amino acid essential for humans and animals, which is widely used in pharmaceutical, food and feed industries. Its green and efficient production has attracted a great deal of attention. Fermentation-enzymatic coupling route is regarded to be promising for L-methionine biosynthesis, while O- succinyl-L-homoserine mercaptotransferase (MetZ) is the key biocatalyst. Exploring and engineering of MetZ with ideal catalytic properties is highly desired. Herein, the MetZ from Chromobacterium violaceum ( Cv MetZ) was screened and through in silico analyses, potential beneficial amino acid residues both at the access channel and around the oxygen anion holes were anchored for site-saturation mutagenesis. The positive mutants were obtained with improved activity for L-methionine biosynthesis using O -succinyl-L-homoserine (OSH) and methyl mercaptan as substrate. The best mutant was further applied for L-methionine production and supply of methyl mercaptan was optimized in a fed-batch approach. The conversion of 100 g/L OSH reached 92% with L-methionine yield of 62.6 g/L, which was well coupled with the OSH fermentation level.
研究领域:
生物化学
·
合成生物学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Binlin Chen,Yueqi Deng,Qingjing Niu,Kongying Zhu,Lixia Ren,Xiaoyan Yuan
Ice formation poses a significant challenge across various fields, from industrial processes to biological preservation. Developing antifreeze agents and recognizing the antifreeze mechanism have gained considerable attention. Herein, a series of poly(l-methionine) derivatives, poly(S-carboxymethyl-l-methionine sulfonium) (PMetA), poly(S-methyl-l-methionine sulfonium chloride) (PMetM), and poly(S-carbamidomethyl-l-methionine sulfonium chloride) (PMetAM), with carboxyl, methyl, and acetamide groups, respectively, are synthesized and investigated for antifreeze. The relationship between the polymer structure and the ice recrystallization inhibition (IRI) activity is examined, suggesting that zwitterionic PMetA shows the highest IRI activity, about 27.0 ± 3.9% at 10 mg mL–1 relative to that of water. Results of low-field nuclear magnetic resonance and differential scanning calorimetry indicate that the IRI activity is associated with the activation energy for hydrogen bond breakage. PMetA exhibits acceptable cytocompatibility at 10.0 mg mL–1 and a good cryoprotective efficiency. This finding provides a valuable insight into the antifreeze mechanism, contributing to the development of potent cryoprotectants.
研究领域:
材料科学
·
生物物理学
·
低温生物学
·
聚合物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Animal Nutrition
·
2024
·
IF 6.1
Xiao Li,Jing Li,Kangle Lu,Xueshan Li,Kai Song,Ling Wang,Chunxiao Zhang
A 10-week feeding trial, followed by 24-h nitrite stress, was performed to evaluate the effects of dietary selenium-L-methionine (Se-Met) on growth, Se accumulation, antioxidant capacity, transcripts of selenoproteins and histological changes of muscle as well as resistance to nitrite stress in spotted seabass ( Lateolabrax maculatus ) reared at optimal (27 °C) and high (33 °C) temperatures. Five experimental diets were formulated to contain 0, 0.9, 1.8, 3.5, and 7.0 mg Se-Met/kg. Each diet was fed to fish (2.60 ± 0.2 g) in two parallel treatments at 27 or 33 °C. The results showed that elevated temperature (33 °C) induced thermal stress in fish, and fish under thermal stress exhibited lower weight gain (WG) and hepatosomatic index (HSI) but a higher condition factor (CF) compared to those reared at 27 °C. However, the growth and feed utilisation were promoted in L. maculatus with 0.9 to 3.5 mg/kg Se-Met treatments. The protein and lipid content in the muscle increased with the dietary Se-Met level, and the total Se level in the whole body and muscle showed a linear increase with dietary Se-Met supplementation. Thermal stress changed the histology of the muscle, leading to raised levels of malondialdehyde (MDA), reduced antioxidant parameters in the serum and liver, and a decrease in the transcripts of selenoprotein genes in the muscle. Meanwhile, increased antioxidant capacity of serum and liver and up-regulated transcripts of selenoprotein of muscle were observed in L. maculatus reaching a maximum with 3.5 mg Se-Met/kg treatment. After 24 h of nitrite stress, thermal stress exacerbated oxidative damage caused by nitrite stress in L. maculatus . In contrast, dietary Se-Met enhanced the resistance to nitrite stress of L . maculatus fed with Se-Met enriched diets containing 0.9 to 1.8 mg Se-Met/kg. Based on the effects of dietary Se-Met on the growth, antioxidant capacity and resistance to nitrite stress of L. maculatus , this study suggests that the optimal range of Se-Met supplementation in L. maculatus diets is 1.80 to 2.39 mg Se-Met/kg of diet at 27 °C and 1.80 to 4.46 mg Se-Met/kg of diet at 33 °C.
研究领域:
水产养殖
·
营养学
·
生理学
·
应激生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Xuejian Liu,Yan Li,Guang-Jin Chen,Dao-Yi Chen,Bo Sun,Zhenyuan Yin
CO2 capture and sequestration are broadly recognized as the most effective technology for reducing CO2 emissions and mitigating global climate change. In this regard, hydrate-based CO2 sequestration (HBCS) has been proposed as an effective method for long-term safe and stable CO2 sequestration. It is a promising technology for reducing the concentration of CO2 in the atmosphere and achieving carbon neutrality. However, one major challenge related to HBCS technology is the lack of understanding of how to improve the formation kinetics of CO2 hydrate effectively. Herein, in this study, we identified the synergistic promotion effect on CO2 hydrate formation when a low-dose thermodynamic promoter (tetrahydrofuran, THF) is coupled with an environment-friendly kinetic promoter (l-methionine, l-Met). Based on the kinetic experiments and the morphological observation, 0.6 mol % THF coupled with 0.1 wt %l-Met yields the optimal CO2 gas uptake. In situ Raman spectra reveal the mechanism of the observed two-step growth behavior at the molecular level, where low-dose THF promotes the initial CO2-THF sII hydrate nucleation and growth in the solution and l-Met promotes the subsequent CO2 sI hydrate growth along the surface of the reactor. Our study unveils the underlying synergistic mechanism when thermodynamic and kinetic promoters are coupled for CO2 hydrate formation. The results provide guidance for the identification and use of novel bio-friendly thermodynamic and kinetic promoters and are beneficial to a series of sustainable hydrate-based technologies when fast CO2 formation is required.
研究领域:
化学工程
·
环境科学
·
材料科学
·
可持续能源
✓ 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）