MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2015
·
IF 1.955
Chang Su,Yu Li,Yue He,Li Liu,Xuesong Wang,Lili Liu
In this work, pure and Al 2 O 3 -doped α-Fe 2 O 3 nanotubes were synthesized by a simple single-capillary electrospinning technology and followed calcination treatment. The morphologies and crystal structures of the as-prepared samples were characterized by scanning electron microscopy and X-ray diffraction, respectively. The research of the samples gas sensing properties demonstrates that the ethanol sensing properties of α-Fe 2 O 3 nanotubes are enhanced by doping Al 2 O 3 , remarkably. The response value of Al 2 O 3 -doped α-Fe2O3 nanotubes to 50 ppm ethanol is 41.8 at the operating temperature 240 °C, which is much higher than that of pure α-Fe2O3 nanotubes (response value is 4). And the lowest detection limit is 300 ppb, to which the response value is about 2. The response and recovery times are about 20 and 60 s–50 ppm ethanol, respectively. In addition, the Al 2 O 3 -doped α-Fe2O3 nanotubes possess good selectivity and long-term stability.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Food Bioscience
·
2017
·
IF 1.964
Zicong Zeng,Shunjing Luo,Chengmei Liu,Xiuting Hu,Ersheng Gong,Jinyu Miao
Based on the results of phenolic retention of brown rice treated by extrusion with thermostable α-amylase (ETA), this work investigated the phenolic retention of brown rice after extrusion with mesophilic α-amylase (EMA). Similarly, EMA significantly increased phenolic retention of brown rice with the increasing enzyme level, and the phenolic retention was positively correlated with reducing sugars. However, brown rice treated by EMA had higher retention rate of free phenolic content, free antioxidant activity , and total identified free phenolic acids than that treated by ETA at different enzyme levels, although the corresponding reducing sugars produced by EMA were lower than by ETA. These results indicated that the extrusion temperature had greater effect on the phenolic retention than enzymatic hydrolysis during enzymatic extrusion. In addition, brown rice treated by EMA with 0.5% enzyme had a high retention of free flavonoids at 72.4%. Therefore, EMA might be a better processing technology for brown rice to improve its nutrition .
研究领域:
食品科学
·
营养学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Guangdi Nie,Xiaofeng Lu,Maoqiang Chi,Yun Zhu,Zezhou Yang,Na Song,Ce Wang
The incompetency of conventional single-phase electrode materials remains a stumbling block for making further breakthroughs in high-performance supercapacitors. In this work, α-Fe 2 O 3 nanotube@MnO 2 nanosheet hierarchical networks with tunable mass ratio of MnO 2 to α-Fe 2 O 3 are prepared via a simple two-step method for supercapacitor electrodes. The α-Fe 2 O 3 @MnO 2 core-shell heterostructures, especially the FM10020 containing 60.1 wt% of MnO 2 , exhibit a larger specific capacitance of 289.9 F g −1 at 1.0 A g −1 , a better rate capability of 40.8% at 5.0 A g −1 and a higher cycling stability of 85.3% after 1200 cycles than the pure MnO 2 , highlighting the advantages of such unique configuration accompanied by the synergistic effect. It is believed that these intriguing results will provide an alternative way for the construction of metal oxide-based composite nanostructures with improved electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2025
·
IF 3.8
Wang Lei,Li Yue,Wang Sikai,Lv Lin,Liu Hongmei,Zhang Guoqi,Zhao Yan
Diabetes mellitus is a metabolic disorder that impacts millions of individuals globally. In the treatment of this condition, it is imperative to explore natural resources for therapeutic agents that exhibit fewer adverse effects and enhanced efficacy. Currently, the methods employed for isolating anti-diabetic lead compounds from natural sources are often intricate and time-consuming. Therefore, there is an urgent need to develop efficient and rapid screening techniques. In this study, α-amylase was immobilized using a novel polydopamine/L-cysteine bifunctionalized magnetic mesoporous silica composite material (Fe 3 O 4 @nSiO 2 @mSiO 2 @PDA@L-Cys) for the first time. A ligand fishing approach utilizing the immobilized α-amylase was developed to rapidly screen for α-amylase inhibitors from Aloe vera . Characterization and property analysis of the immobilized enzyme showed that the immobilized α-amylase exhibited exceptional stability and reusability. Two ligands were successfully screened from Aloe vera and then characterized as aloin B and aloin A using ultra-high performance liquid chromatography tandem mass spectrometry. Their respective IC 50 values were 0.99 ± 0.09 mM and 1.14 ± 0.05 mM. Molecular docking studies confirmed the interaction of both ligands with specific amino acid residues within the active site of α-amylase. The study presents a fast and efficient approach for screening α-amylase inhibitors from intricate natural sources, thereby offering significant potential for the development of anti-diabetic agents. Graphical
研究领域:
药理学
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生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2025
·
IF 4.9
Yuanxin Pian,Yan Hao,Yuxin Guo,Shiqi Wu,Saijiao Tang,Jiaqi Li,Xinya Lu,Xiaoya Sun,Zhaowen Tan,Tianyu Zhu,Yuxiang Tang,Defeng Xu,Hang Hu
Facile and efficient drug loading and delivery strategies hold paramount importance in the development of advanced pharmaceutical formulations, enhancing both the efficacy and accessibility of treatments. In this study, we successfully prepared dimethylcurcumin (DMC)-loaded α-crocin nanoparticles with varying drug loadings (15.2 % and 21.7 %) using a solvent diffusion method, which exhibit excellent lyophilization stability, relatively small and uniform particle sizes. DMC is encapsulated in an amorphous state within α-crocin nanoparticles, forming strong π-π stacking interactions. Dissipative particle dynamics simulations and transmission electron microscope images confirm the core-shell structure, with DMC aggregates forming the cores and α-crocin coating the surfaces. The drug loading studies on various drugs with different structure and properties show that hydrophobic drugs with π-conjugated systems and planar structures can be efficiently encapsulated with α-crocin. The nanoparticles exhibit sustained drug release in pH 7.4 and pH 5.0 conditions and demonstrate enhanced antitumor activity in vitro compared to free drugs, with DMC@α-Crocin (15.2 %) nanoparticles showing superior performance due to higher cellular uptake. Pharmacokinetic study reveals prolonged blood half-life and increased area under curve for DMC@α-Crocin (15.2 %) nanoparticles, indicating improved drug delivery. This work validates the potential of α-crocin-based drug encapsulation for enhanced cellular uptake, antitumor activity, and prolonged blood circulation, providing new insights into the development of efficient drug delivery system.
研究领域:
药剂学
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生物医学工程
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纳米医学
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产品关联
DOI
高影响因子
MOLECULES
·
2014
·Vol. 19
·期 12
·19665-19677
·
IF 2.095
Zong-Bo Xie,Da-Zhao Sun,Guo-Fang Jiang,Zhang-Gao Le
A mild and efficient method catalyzed by α-chymotrypsin was developed for the synthesis of bis(indolyl)methanes through a cascade process between indole and aromatic aldehydes. In the ethanol aqueous solution, a green medium, a wide range of aromatic aldehydes could react with indole to afford the desired products with moderate to good yields (from 68% to 95%) using a little α-chymotrypsin as catalyst.Keywords:bis(indolyl)methanes;tandem protocol;biocatalysis;promiscuity;α-chymotrypsin
研究领域:
有机化学
·
生物催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 1
·e202304480
·
IF 1.9
Lu Xiong,Haisheng Hu,Meitang Liu,Lun Zhuang,Yunfei Li
Graphical The graphical summary shows the preparation of lithium carbonate from α -lithium pyroxene using an alkaline roasting process in a low-energy method. This new method achieves the full utilization of spodumene with lower energy consumption and demonstrates great potential for industrial applications. Extracting lithium from spodumene by sulfuric acid roasting is the largest commercialized way at present, which not only consumes a large amount of energy but also produces massive waste residue that will cause environmental problems. In this work, a new process for extracting lithium by directly decomposing α -spodumene through alkali calcination is designed. The reaction of α -spodumene with Na 2 CO 3 at 750 °C for 2 h can decompose it and form nepheline and lithium silicate/sodium silicate. The nepheline and soluble lithium silicate/sodium silicate are separated by water leaching, and 93.9 % of lithium can be leached under optimal conditions. In addition, the synthesis of nano-kaolinite is investigated with nitric acid solutions. Conversions of 98.7 % were obtained with 0.4 M nitric acid at 250 °C and an L/S ratio of 17.5 L/kg. The water leachate can precipitate Li 2 CO 3 with a purity of 99.0 % by CO 2 after desilicated by CaO. The final yields of Li 2 CO 3 and kaolinite relative to the Li and Si content of the starting minerals are 91.4 % and 48.5 %, respectively. This new method achieves the full utilization of spodumene with lower energy consumption and demonstrates great potential for industrial applications.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 11
·8329-8338
·
IF 2.019
Xing Honglong,Shen Ziyao,Wang Lei,Zhu Yanting,Ji Xiaoli
α-Fe 2 O 3 /SnO 2 @polyaniline composites were prepared by combining a hydrothermal reaction and an emulsion polymerization process. The sizes of α-Fe 2 O 3 and SnO 2 particles dispersed into PANI were 80–120 and 8 nm, respectively. The structure, morphology, and electromagnetic (EM) parameters were characterized by using X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and vector network analysis. To achieve the absorption of different EM bands, the EM wave absorption properties of α-Fe 2 O 3 /SnO 2 @PANI composites with different stannic oxide content were investigated according to transmission line theory. Polarizations and multiple reflections in the composite absorber play a key role in EM wave absorption. The α-Fe 2 O 3 /SnO 2 @PANI composites exhibited high EM absorption capacity and an optimal reflection loss of −50.3 dB at 9.9 GHz with thickness of 2.7 mm. Moreover, the composite could reach an effective absorption bandwidth (below −10 dB) from 7.84 to 12.08 GHz. Thus, the synthesized composites are suitable candidates for highly efficient EM wave absorption in the entire X-band.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2018
·
IF 0
Chenlu Ye,Kang Hu,Zhijuan Niu,Yiran Lu,Lin Zhang,Kai Yan
One-step controllable synthesis of rhombohedral α-Fe 2 O 3 photocatalyst has been successfully developed by P123 soft template assisted method. A combination analysis of XRD, BET, SEM and HRTEM has documented that P123 surfactant plays a crucial role in the controllable synthesis of rhombohedral α-Fe 2 O 3 with the exposure of (110) and (012). The as-obtained α-Fe 2 O 3 material is efficient for the photocatalytic degradation of Bisphenol A (BPA). About 91% of BPA (30 mg/L) was degraded by using 1 g/L α-Fe 2 O 3 within 6 h under the simulated sunlight irradiation, which was almost twice higher than that of commercial Fe 2 O 3 . More importantly, reaction intermediates (e.g., 4, 4′-methylenediphenol, phenol and lactic acid) were confirmed by LC–MS/MS analysis, and the rational pathway of BPA degradation was finally proposed.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
FOOD CHEMISTRY
·
2022
·
IF 9.231
Yi-Fan Tang,Wen-Xi Zhan,Mi-Zhuan Li,Lei Wang,Jie-Ying Wei,Jun-ling Deng,Zhong-Xiu Chen
Glutathione (GSH) is a natural antioxidant that helps fight free radicals. Whether it will affect the activity of amylase and starch digestion remains unknown. This research disclosed that GSH could interact with starch through hydrogen bonds, which accelerated the swelling of starch granules and promoted the formation of ordered double-helix crystalline, and therefore inhibited starch digestion. Moreover, pig pancreas α-amylase (PPA) which was incubated with GSH displayed a less stable conformation and decreased activity. However, in a crowded media constructed by sodium caseinate (NaCas), an antagonistic effect existed between GSH and NaCas. As the rate and extent of starch digestion have been linked with health aspects, this study suggests that GSH can be used in the formulation of diet foods. It also reminds us to consider the synergistic or antagonistic effects caused by the coexisted components in the complexed food matrix.
研究领域:
食品科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Fu He,Wencheng Ma,Dan Zhong,Yixing Yuan
The pipe deposits from water distribution network are iron-wastes, which could be used as a catalyst of advanced oxidation processes (AOPs). This paper prepared one main composition (α-FeOOH) of pipe deposits and compared the difference of chloramphenicol (CAP) degradation by α-FeOOH-activated hydrogen peroxide/persulfate and α-FeOOH-activated hydrogen peroxide/peroxymonosulfate with hydroxylamine assistance. Several key affecting factors were investigated. The results revealed that the double-oxidant system has a synergy effect in CAP degradation process. The hydroxyl radicals were identified as the predominant radicals in two different degradation processes via electron paramagnetic resonance (EPR) technique. The possible degradation pathways and products were confirmed by liquid chromatography-mass spectrometry (LC-MS). This study provided a theoretic research for pollutant removal by taking full advantage of pipe deposits and advance the development of water quality security in water distribution network in future.
研究领域:
环境科学
·
水处理工程
✓ 已验证
DOI
高影响因子
Crystals
·
2025
·Vol. 15
·期 8
·716
·
IF 2.4
Yang Li,Xue Du,Silong Zhang,Bo Liu,Naizhe Zhao,Yapeng Zhang,Xiaoping Ouyang
Thin-film detection technology plays a significant role in particle physics, X-ray imaging and radiation monitoring. In this paper, the detection capability of a Cs3Cu2I5thin-film scintillator toward α particles is investigated. The flexible thin-film scintillator is fabricated by a facile and cost-effective in situ strategy, exhibiting excellent scintillation properties. Upon α-particle excitation, the light yield of the Cs3Cu2I5thin-film is 2400 photons/MeV, which greatly benefits its application for single-particle events detection. Moreover, it shows linear energy response within the range of 4.7–5.5 MeV and moderate decay time of 667 ns. We further explored the cryogenic scintillation performance of Cs3Cu2I5@PMMA film. As the temperature decreases from 300 K to 50 K, its light yield gradually increases to 1.3 fold of its original value, while its decay time remains almost unchanged. This scintillator film also shows excellent low-temperature stability and flexible operational stability. This work demonstrates the great potential of the Cs3Cu2I5@PMMA film for the practical utilization in α-particle detection application.
研究领域:
粒子物理
·
辐射探测
·
材料科学
·
核工程
✓ 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）