BIOCATALYSIS AND BIOTRANSFORMATION
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2021
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IF 2.181
Weican Wang,Ling Li,Xiaoda Wang,Ting Qiu,Jianhao Yang,Changshen Ye
The enzyme-catalyzed transesterification reaction is an important route to realize the resolution of racemic optically active secondary alcohols. However, this route suffers from the high environment and engineering risks due to the usage of vinyl ester as acyl donor. In this work, an alternative acyl donor, ethyl butyrate, was used because it is more environment-friendly and catalyst-friendly. The kinetic studies on transesterification of 1-phenylethanol with ethyl butyrate catalyzed by immobilized-lipase Novozym™ 435 were carried out. The effects of agitation speed, reaction temperature, catalyst loading and initial molar ratio of reactants were investigated. The Ping-Pong-Bi-Bi and pseudo-homogeneous models were used to correlate the experimental data to estimate the kinetic parameters. The concentration-based Ping-Pong-Bi-Bi model was translated into its activity-based form to describe the non-ideality of the lipase-catalyzed reaction system. The activity-based Ping-Pong-Bi-Bi kinetic model performed best among all the models used.
研究领域:
生物化学
·
酶工程
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产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2018
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IF 5.158
Rui Hu,Bingxue Huang,Zhouhang Xue,Qingye Li,Tian Xia,Wei Zhang,Canhui Lu,Huagang Xu
Three-dimensional (3D) printing parts with excellent resolution and high performance are of great significance for scientific and engineering applications. In this study, a novel photocurable cellulose acetate butyrate (PC-CAB) resin was synthesized for continuous liquid interface production (CLIP) to construct 3D objects with high resolution, tailored mechanical properties, excellent chemical resistance and thermal stability. Particularly, the tensile and flexural strength of the CLIP 3D printed specimen could reach 44.67 and 64.53 MPa, respectively. Their solvent resistance against various organic solvents and strong acidic/basic solutions was evaluated. As expected, the 3D prints could well maintain their structural integrity and exhibited very low swelling ratios owing to the photo-induced chemical crosslinking structure. Notably, even after immersion in methylene chloride or 1.0 M acid/alkali for 3 h, the 3D prints still showed excellent mechanical and thermal properties. Further study demonstrated that when PC-CAB in the CLIP ink was optimized to 20 wt% while the photoinitiator (PI) was 0.5 wt%, complex-structured 3D printed objects with high surface quality could be obtained under specific printing parameters.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AQUATIC TOXICOLOGY
·
2024
·
IF 4.1
Sijie Zhang,Hao Wang,Yunlong Meng,Mijia Li,Yang Li,Xinhao Ye,Shiyi Duan,Shimei Xiao,Huiqiang Lu,Keyuan Zhong
Wound healing and tissue regeneration are influenced by a variety of factors. Adverse lifestyle habits, such as excessive alcohol consumption, delay wound healing and increase the risk of secondary infections. Ethyl butyrate is a common food additive widely used to enhance the aroma of alcoholic beverages. This additive is generally considered harmless to human health in both industrial and domestic settings. However, the ecotoxicity and its effects on wound healing have not been elucidated. In this study, we used zebrafish as the experimental animal, and the caudal fins were amputated to explore the effects of ethyl butyrate on wound healing and tissue regeneration. The effect of ethyl butyrate on blastema and bone regeneration and its impact on the transcriptional levels of regeneration-related genes and inflammation-related genes were evaluated. RNA-seq was conducted to determine the differentially expressed genes (DEGs) between the treatment and the control groups. KEGG and GO analysis was conducted to explore the functions of DEGs. Significantly enriched GO terms and KEGG pathways were identified to explore the molecular mechanism underlying the inhibition of zebrafish caudal fin regeneration by ethyl butyrate. The results demonstrated that ethyl butyrate significantly inhibited the regeneration of zebrafish caudal fins, including blastema and bone regeneration. Ethyl butyrate exposure significantly downregulated the expression of genes associated with bone and blastema regeneration and inflammation response. KEGG and GO functional analyses revealed that the DEGs were associated with significant enrichment of extracellular matrix-receptor interactions. Ethyl butyrate treatment downregulated the expression of most extracellular matrix-related genes. These findings indicate that ethyl butyrate potentially modulates pathways associated with the structure, adhesion, modification, and degradation of the extracellular matrix, thereby disrupting extracellular matrix remodeling, inhibiting wound inflammation, impairing blastema and bone regeneration and ultimately hindering caudal fin regeneration. In summary, the findings demonstrate that ethyl butyrate disrupts extracellular matrix remodeling and inhibits the regeneration of zebrafish caudal fins. These results provide valuable insights into the rational use of ethyl butyrate and further investigation of wound healing mechanisms.
研究领域:
毒理学
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再生生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Xiaoda Wang,Lumin Han,Weican Wang,Ling Li,Ting Qiu
The enzymatic reaction–distillation coupling process is a promising technology to realize the chiral resolution of (R/S)-1-phenylethanol with ethyl butyrate and ethanol as acyl donor and byproduct, respectively. In order to design such a coupling process, the vapor–liquid equilibrium (VLE) data are necessary. However, these data were incomplete in literatures. In this work, the isobaric VLE experiments were conducted at 101.3 kPa for the binary systems of 1-phenylethanol + ethyl butyrate, 1-phenylethanol + ethanol, 1-phenylethyl butyrate + ethyl butyrate, 1-phenylethyl butyrate + ethanol, and 1-phenylethyl butyrate +1-pheny ethanol. Additionally, the saturated vapor pressure of 1-phenylethyl butyrate was measured in the temperature range 420–500 K and correlated with the Antoine equation. Both the Non-Random Two Liquid (NRTL) and Wilson models were used for the correlation of experimental VLE data. Both models showed satisfactory accuracy, although the Wilson model performed slightly better than the NRTL model. This work would provide important thermodynamic information for the design of enzymatic reaction–distillation coupling process to realize the chiral resolution of (R/S)-1-phenylethanol.
研究领域:
化学工程
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生物化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2025
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IF 4.7
Yajuan Tu,Yuxin Hou,Xinyang He,Ming Ouyang,Ruoyi Chen,Xiang Wang,Xingyun Guan,Peng Liu,Mingli Fu,Steven L. Suib,Pingxiao Wu,Daiqi Ye
Natural nanofibrous palygorskite with micropores, nanotubular halloysite with mesopores, and disc-shaped diatomite with macropores exhibit distinct advantages in dispersing metal oxide particles due to their regular porosity, mechanical adhesion, and thermal stability. Three natural porous minerals with typical morphology were employed as supports for Cu-Co oxides in the catalytic oxidation of butyl acetate. XRD and Raman reveal that spinel-structured Cu 0.72 Co 2.28 O 4 and tenorite-structured CuO are main phases on three supports, while SEM and TEM suggest that halloysite and palygorskite are better than diatomite in dispersing Cu-Co oxide particles. Due to high dispersion, superior reducibility, and moderate Co 3+ -O 2- , the halloysite-supported Cu-Co oxides exhibit the lowest T 50 of butyl acetate conversion at 232 °C among three supported catalysts. Natural porous supports modulate the spinel lattice, improve the adsorption of butyl acetate, provide surface hydroxyls in oxidation, and enhance the thermal stability of Cu-Co oxides. The gaseous O 2 supplements the surface chemisorbed oxygen and lattice oxygen, which participate in the complete oxidation of butyl acetate. Above results indicate that natural porous minerals are potential supports to transition metal oxides for VOCs oxidation.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Litao Lin,Tengchao Guo,Yu Chen,Xiaochi Lu,Bin Quan,Xiaogu Huang
The advancement of hyperspectral detection technology has challenged the development of hyperspectral camouflage materials. Despite the high spectral similarity of existing bio-inspired hyperspectral materials, their poor weather resistance limits their application in harsh environments. To address this, it is essential to enhance the weather resistance of hyperspectral materials while maintaining high spectral similarity. Therefore, inorganic hyperspectral materials are employed to improve durability. However, these inorganic materials generally exhibit lower spectral similarity and insufficient near-infrared reflectance, which restricts their ability to match the spectral characteristics of diverse plant backgrounds. To enhance spectral and color similarity with green plants, this study investigates Cr 2-x Ti x O 3 , which exhibits low visible reflectance and high near-infrared reflectance. The impact of annealing temperature on reflectance (400–1300 nm) was assessed using SEM, XRD, XPS, and UV–Vis–NIR spectroscopy. The influence of free carrier concentration and particle size on reflectance was analyzed. Hyperspectral coatings based on Cr 2-x Ti x O 3 were prepared, demonstrating tunable hyperspectral reflectance. Results indicate that Cr 2-x Ti x O 3 annealed at 1100 °C has the highest near-infrared reflectance, largest red-edge slope, and tunable range, with low visible reflectance. Ultimately, the optimized spectral similarity of these coatings can reach 97 %, coupled with superior environmental durability.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mengru Geng,Xiaosen Pan,Jiaqi Zhao,Xiaojuan Wang,Ruiming Liu,Zijun Xu,Ning Ma,Meng Gao,Mingzhe Shao,Jie Li
Perovskite is proven to promote the surface dissociation of water molecules that are therefore applied in humidity-responsive electronics. However, inherent defects in crystals severely hinder structural stability and charge transfer which decline the performance of the devices. For this, we design a strategy to introduce Cs 2 SnCl 6 perovskite into the graphene oxide reduction system, during which the growth and optimization of perovskite crystals are achieved, accompanied by the formation of interface coordination with semi-reduced graphene oxide, obtaining stability and durability humidity-sensitive non-contact sensors. The results prove that the sensor exhibits low latency in response (0.8 s) and recovery (1.9 s), excellent sensitivity (6.5 × 10 6 ), and long-term stability (over 240 days). Additionally, distinguishable signals can be output easily in multiple different non-contact sensing applications and gesture recognition applications can be successfully implemented, which provides a possibility of human–computer interaction.
研究领域:
材料科学
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电子工程
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传感器技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Helong Zhang,Chuxiong Qiu,Rong Zhang,Hao Zhang,Yunxia Chen,Tao Zeng,Fen Qiao,Lee Li,Ghafar Ali,Xiujian Zhao,Yi Xie
We develop layered MAX (e.g., Ti 3 AlC 2 , Ti 3 AlCN, Ti 2 AlC, Ti 2 AlN) into novel photothermal silica-deposited MAX (MAX@SiO 2 ) composites and coatings for efficient seawater desalination and anti-/de-icing, by combining their strong optical absorbance capacity covering UV-Vis-NIR regions with unique surface wettability. The water evaporator with a unique gradient superhydrophilicity-hydrophilicity-hydrophobicity-superhydrophobicity is achieved by incorporating the as-synthesized hydroxyl- and methyl-modified MAX@SiO 2 composites into porous melamine foam (MF). By combining the unique gradient wettability with porous structure and strong optical absorbance, the proposed MAX@SiO 2 evaporator displays excellent seawater desalination performance with high water evaporation rates of ∼2.19 and 3.45 kg m −2 h −1 under 1.0 and 2.0 sun irradiation, respectively. The photothermal water evaporation efficiency can reach to 91.2 % under 1.0 sun illumination. Besides, by sequential spray-depositing resin-based primer and MAX@SiO 2 top-coat on glass slides and insulators, the as-achieved superhydrophobic (SH) photothermal coatings displayed excellent anti-icing and de-icing performances. The procedures described here enable a convenient and novel strategy to develop micro-nanocomposites and multifunctional coatings with strong photothermal conversion ability, which would shed light on promising potentials in energy conversion and photo-thermal applications including solar freshwater generation, sewage purification, and anti-/de-icing.
研究领域:
材料科学
·
环境工程
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能源转换
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光热应用
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Hui Liu,Yuewen Huang,Yaodong Zhang,Zicheng Xie,Binzhi Wang,Bin Wang
UV curing technology has numerous advantages such as a fast curing speed, environmental friendliness, energy conservation, and thus it is widely used in industrial production and out daily life. Free-radical polymerization is the primary mechanism for UV curing technology. However, free-radical polymerization is susceptible to oxygen inhibition, which leads to incomplete curing when this approach is employed in the air. This paper describes a new silicone acrylate prepolymer , four double bonds and a tertiary amine group at each end of the prepolymers can effectively solve the oxygen inhibition. We synthesized an alkoxymethacryloxy titanium monomer (Ti-MA). This monomer was mixed with the prepolymer and UV cured, which resulted in improved coating properties. The results showed that the double bond conversion of the prepolymer reached 90.66 ± 0.5 % at 20 s, and the residual adhesion rate also exceeded 90 %. The hardness of the coating could reach pencil hardness level 4H with the addition of Ti-MA, and the water contact angle reached 104.5 ± 0.2°, as well as excellent anti-smudge and anti-fingerprint properties. This study provides a new method to solve the oxygen inhibition problem, which has a broad application prospect in the field of coatings.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Guangyuan Feng,Huicong Chang,Shujuan Tan,Lejun Qu,Tianyu Chen,Lin Xiao,Guangbin Ji
Carbon-based materials exhibit unrivaled ability to modulate electromagnetic waves in the infrared band. However, the black appearance restricts the application in the visible light camouflage. This work combines color coatings (consisting mainly of pigments and thermochromic microcapsules) with carbon-based devices and overcomes the high absorption of the color coatings in the mid-infrared band. Ultimately, the obtained white carbon film (W-CNT) device exhibits tunable thermal emissivity from 0.453 to 0.833, maintains a residual modulation range up to 71.7%. In addition, the expansion of the coloration layer to thermochromic microcapsules enables the devices to independently modulate the visible and mid-infrared spectra, further expanding the applicability. We believe that the carbon-based device is valuable for a wide range of applications in camouflage and personal thermal management, which may provide some ideas for designing multispectral independent modulation devices.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Nan Shi,Baozhu Yang,Junyao Li,Wenrong Cai,Laidi Xu,Yongxin Tao,Yong Kong
Hollow polymer microspheres (HPMs) were synthesized, which were then hydrolyzed in aqueous ammonia to produce carboxyl (–COOH) groups on their surface. L-phenylalanine (L-Phe) was grafted to the hydrolyzed HPMs (H-HPMs) through amidation reactions, endowing the H-HPMs with chirality. The resultant chiral HPMs (C-HPMs) were used for the chiral discrimination of tryptophan (Trp) isomers. Due to the same rotatory direction of L-Phe and L-Trp, the C-HPMs showed greatly higher selectivity toward L-Trp than its isomer. After being adsorbed by the C-HPMs, the absorbance of the residual L-Trp is significantly lower than that of the residual D-Trp, and thus spectroscopic chiral discrimination of the Trp isomers was successfully achieved. The Trp isomers were also discriminated by the chiral solid polymer microspheres (C-SPMs), while the difference in the absorbance of the residual L-Trp and D-Trp is remarkably smaller than that obtained by the C-HPMs. The outstanding discrimination capability of the C-HPMs might be ascribed to their high surface permeability resulted from their unique hollow structure.
研究领域:
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
BaoZhu Shi,Haixin Sun,Qiaojun Jia,Hao Zhang,Hao Huang,Zisheng Luo
Carya cathayensis Sarg. green husk (CSGH), one kind of by-product in the nut industry, contains abundant triterpenic acids. This study explores a green extraction approach of triterpenic acid from CSGH using nanobubbles (NBs) and ultrasound-assisted extraction based on hydrophobic natural deep eutectic solvents (HBDES). Triterpenic acids were identified in CSGH using UPLC-Triple-TOF/MS. The HBDES was designed via Hansen solubility parameters, consisting of thymol and linalool (Thy/Lin), and demonstrated the highest yield of triterpenic acids. NBs were generated in Thy/Lin, with an average size of 237.36 nm and the triterpenic acids yield enhancement. Ultrasonic conditions also affect the total contents of the triterpenic acids extracted by Thy/Lin containing NBs partially due to the characters of NBs under ultrasound. The microstructural changes of CSGH confirmed the synergistic effect between ultrasound and NBs which enhanced the release of triterpenic acids. This proposed technique offers a green and efficient solution for extracting triterpenic acids.
研究领域:
食品科学
·
环境科学
·
植物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）