JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2010
·
IF 1.695
Li Jing,Zheng Danxing,Fan Lihua,Wu Xianghong,Dong Li
The aim of this work is to investigate improving the effects for adding ionic liquids (ILs) to the working fluids of absorption cycle, lithium bromide aqueous solution (H2O + LiBr), and lithium chloride aqueous solution (H2O + LiCl). 1,3-Dimethylimidazolium chloride ([Dmim]Cl) and 1,3-dimethylimidazolium tetrafluoroborate ([Dmim]BF4) were selected to be additives. The vapor pressure data were measured for the H2O + LiBr + [Dmim]Cl system (LiBr/[Dmim]Cl mass ratio = 3), H2O + LiBr + [Dmim]BF4 system (LiBr/[Dmim]BF4 mass ratio = 2), H2O + LiCl + [Dmim]Cl system (LiCl/[Dmim]Cl mass ratio = 2), and H2O + LiCl + [Dmim]BF4 system (LiCl/[Dmim]BF4 mass ratio = 2) by means of the boiling point method, at temperatures from (303.60 to 439.42) K and the mass fraction of absorbent species from 0.20 to 0.70, respectively. The Antoine-type equation was used to correlate the experimental data of the ternary systems, and the agreements with the experimental data were excellent; that is, the average absolute relative deviations (ARDs) for pressure between experimental and calculated values were 1.05 %, 0.75 %, 0.63 %, and 0.92 % for the systems. Compared with traditional working fluids of absorption cycle, H2O + LiBr and H2O + LiCl, the promising results show that four ternary systems investigated in this work might be used as alternative working fluids to improve the performances of absorption cycles and liquid desiccant dehumidification systems.
研究领域:
热力学
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制冷与空调
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化学工程
·
离子液体应用
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Mengmeng Feng,Huifang Ge,Ting Zhang,Jingbo Liu,Boqun Liu,Yali Yu
The quantification and analysis of free amino acids (FAAs) in serum is important for illness diagnosis due to its content varies with the body’s condition. In this study, a new sensitive analytical method based on liquid chromatography electrospray ionization mass spectrometry (LC-ESI-MS/MS) was optimized for simple and rapid simultaneous detection of 20 amino acids by pre-column derivatization. Amino acid derivatized by 9-fluorenyl methyl chloroformate (FMOC-Cl) were eluted and separated by simple mobile phase reagent in 20 min via gradient elution using a traditional reverse phase C18 column (150 × 4.6 mm, 5 μm), at the flow rate of 0.8 mL/min. After optimizing derivatization, LC-MS/MS conditions, and sample pre-treatment, this method was verified with LODs and LOQs ranging from 0.0237 to 0.2391 ng/mL and 0.079 to 0.7971 ng/mL. The intra- and inter-day precision was no more than 10 %. The overall accuracy and recovery varied from 88.4-111 % and 88.7–114 %, respectively. Those methods were first applied to mice serum with ulcerative colitis. The results showed that the levels of Ala, Arg, Trp, Lys, Cys, Tyr, and Phe significantly increased in pre-treated group by egg white peptides, which will participate in metabolism. This study provides a valuable reference for further research on the pathogenesis of ulcerous colitis and the development of functional foods to relieve inflammation and balance metabolism.
研究领域:
分析化学
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医学
·
营养学
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DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Hongqi Nie,Ruixuan Xu,Xin Li,Yuruizhi Lin,Suhang Chen,Kangzhen Xu,Jia-Rong Zhang,Qi-Long Yan
The combustion characteristics and energy output properties of solid propellants play a decisive role in rocket engine and propulsion system performance. Particularly for HTPB propellant systems incorporating CL-20 as the high-energy oxidizer, achieving wide-range burn rate regulation and maintaining low pressure exponents constitute fundamental requirements for practical implementation. Through advanced interfacial control methodology, this study successfully constructed two types of aluminum/oxidizer integrated composites (Al@AP and Al@CL-20), while employing precise catalysis to accurately distribute C 3 N 4 burn rate modifiers within the target oxidizer. This innovative approach has demonstrated significant enhancement in aluminum combustion efficiency within the composite propellant system. The strategic incorporation of C 3 N 4 , coupled with the optimized interfacial architecture between fuel and oxidizer components, establishes a new paradigm for performance modulation in solid propellant formulations. Thermal analysis (DSC/TGA) results reveal that both Al@AP/CN and Al@CL-20/CN composites exhibit concentrated exothermic characteristics, yet demonstrate fundamentally distinct heat release profiles. By strategically exploiting these differential energy release features, propellant formulations with tailored interfacial compositions and precisely engineered catalytic sites were developed. The modified propellants displayed markedly different combustion behaviors: the Al@CL-20/CN-based formulation achieved a 33% reduction in pressure exponent ( n =0.18) with significantly enhanced low-pressure burning rates, while the Al@AP/CN-modified system maintained ultra-low burning rates (<5 mm·s -1 ) but with high combustion efficiency across broad pressure ranges with an exceptionally low pressure exponent of 0.23. Complementary analysis of condensed combustion products (CCPs) confirmed substantial improvements in combustion completeness, showing a 78% reduction in micron-sized aluminum agglomerates and significantly refined CCPs particle size distribution. These findings collectively demonstrate that the synergistic combination of interfacial modification and precision catalysis effectively optimizes aluminum combustion efficiency and tunability of burn rate of high-energy HTPB propellants.
研究领域:
航空航天工程
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推进系统
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材料科学
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含能材料
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燃烧化学
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DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
You Xiujia,Zhang Hanmin,Lin Hongjun,Rao Linhua
Gel fouling is a major rate-limiting factor for forward osmosis (FO) dewatering of waste activated sludge (WAS). This study proposes a novel FO system, assisted by in-situ ultraviolet/electrooxidation (UV/E-Cl) driven by dynamic reverse chloride ions (Cl − ), for simultaneous WAS conditioning and dewatering. Superior filtration performances were achieved, with water flux reaching 614% of the control and filtration resistance reduced by orders of magnitude, primarily due to the targeted attack on protein and polysaccharide fractions within extracellular polymeric substances (EPS). Density functional theory (DFT) simulations identified that protein-polysaccharide interactions prefer a specific linear configuration, driving cross-linked network formation. Interfacial thermodynamics demonstrated that UV/E-Cl decreased foulant adhesion energy on the membrane surface by 97.51% through cleaving cross-links. Crucially, this work provides the quantitative thermodynamic evidence that shifts in water occurrence states surrounding network pores from bound to free water dominate gel fouling mitigation, with chemical potential variation accounting for 90.71% of filtration resistance.
研究领域:
环境工程
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生物化学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 5
·1-12
·
IF 2.8
Xing Xue,Cao Weiwei,Wu Zhaoxin,Bai Xiaohong,Gao Jiarui,Liang Xiaozhen,Wang Bo,Wang Chao,Xiang Junjie,Shi Dalian,Lv Linwei,Bai Yonglin
In this study, we investigated the microstructural and luminescence characteristics of high-linearity ZnS:Cu 2+ ,Cl − phosphor. Through conducting the method of high-temperature solid state reaction, we prepared the ZnS phosphors characterizing with two different doping concentrations of Cu 2+ ions. The prepared two kinds of ZnS phosphors exhibit two coexisting forms of cubic phase and hexagonal phase, to which the concentration of Cu 2+ imposes no influence on the microstructure of the phosphor. The average particle size is 2.68 ± 0.5 μm and the emission wavelength locating at approximate 460 nm attribute to the zinc vacancy. As the concentration of the Cu 2+ ions increases, the energy bandgap, the fluorescence lifetime and the luminescence intensity decrease, causing noticeable concentration quenching. In addition, the linear correlation between the emission intensity and the current of the prepared phosphors is stronger than that of commercial ones. The prepared ZnS:Cu 2+ ,Cl − phosphor with high linearity and short fluorescence lifetime has great potential to be applied in practical applications in the field of high-energy physics and astrophysical exploration.
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高影响因子
Defence Technology
·
2018
·
IF 0
Teng Chen,Yan Zhang,Shuang-feng Guo,Liu-ming Zhao,Wei Chen,Ga-zi Hao,Lei Xiao,Xiang Ke,Wei Jiang
A sol-gel freezing-drying method was utilized to prepare energetic nanocomposites based on 2, 4, 6, 8, 10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane (CL-20) with 3, 3-Bis (azidomethyl) oxetane-tetrahydrofuran copolymer (BAMO-THF) as energetic gel matrix. Scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman, Fourier-transform infrared spectroscopy (FT-IR) and differential thermal analyser (DTA) were utilized to characterize the structure and property of the resultant energetic nanocomposites. Compared with raw CL-20, the average particle sizes of CL-20 in CL-20/BAMO-THF energetic nanocomposites were decreased to nano scale and the morphologies of CL-20 were also changed from prismatic to spherical. FT-IR detection revealed that CL-20 particles were recrystallized in BAMO-THF gel matrix during the freezing-drying process. The thermal decomposition behaviors of the energetic nanocomposites were investigated as well. The thermolysis process of CL-20/BAMO-THF nanocomposites was enhanced and the activation energy was lower compared with that of raw CL-20, indicating that CL-20/BAMO-THF nanocomposites showed high thermolysis activity. The impact sensitivity tests indicated that CL-20/BAMO-THF energetic nanocomposites presented low sensitivity performance.
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PLoS One
·
2017
·Vol. 12
·期 5
·e0178226
·
IF 2.806
Peng-Xiao Chen,Yi-Lin Zhang,Jia-Wen Xu,Ming-Hao Yu,Jie-Hong Huang,Lei Zhao,Wen-Liang Zhou
Sodium tanshinone IIA sulfonate (STS) is a derivate of tanshinone IIA, a lipophilic compound in Salvia miltiorrhiza . This study aimed to investigate the effect of STS on ion transport in mouse tracheal epithelium and the mechanisms underlying it. Short-circuit current ( I sc ) was measured to evaluate the effect of STS on transepithelial ion transport. Intracellular Ca 2+ imaging was performed to observe intracellular Ca 2+ concentration ([Ca 2+ ] i ) changes induced by STS in primary cultured mouse tracheal epithelial cells. Results showed that the apical application of STS at mouse trachea elicited an increase of I sc , which was abrogated by atropine, an antagonist of muscarinic acetylcholine receptor (mAChR). By removing ambient Cl − or applying blockers of Ca 2+ -activated Cl − channel (CaCC), the response of STS-induced I sc was suppressed. Moreover, STS elevated the [Ca 2+ ] i in mouse tracheal epithelial cells. As a result, STS stimulated Cl − secretion in mouse tracheal epithelium via CaCC in an mAChR-dependent way. Due to the critical role of Cl − secretion in airway hydration, our findings suggested that STS may be used to ameliorate the airway dehydration symptom in cystic fibrosis (CF) and chronic obstructive pulmonary disease (COPD).
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yinan Liu,Xiangyi Tang,Fei Shen,Jiahong Zou,Yanjun Yin,Zhaojie Jiao,Xiaoshu Lv,Wenyang Fu,Yan Zou,Guangming Jiang,Hong Liu
Electrocatalytic hydrodehalogenation (ECHD) offers a promising approach for detoxification of the halogenated antibiotics via hydrogenolysis of the C-X bonds (X = F, Cl or Br). Herein we demonstrated that the commercially-available cobalt phthalocyanine (CoPc) molecules with a high-loading of −[Co-N 4 ]- moieties (Co wt%: 10.8 %) were exceptionally active for hydrogenolysis of the C-Cl bonds in florfenicol (FLO). It afforded an impressive mass activity of 6.2 g FLO h −1 g -1 Co , a low Co leaching of 0.34 μg/L and a strong tolerance to interference from impurities in water, significantly surpassing reported Co/Fe/Ni-based particle and single-site counterparts. Mechanistic studies revealed that the ECHD on CoPc underwent a direct electron transfer manner rather than the atomic hydrogen (H*)-mediated indirect way, and the ECHD efficacy was affected by both the electron and proton transfer kinetics. The single-atom Co, with its d orbitals constituting the lowest unoccupied molecular orbitals of CoPc, served as the primary active site. It facilitated both electron and proton transfer, as well as the cleavage of the C-Cl bond but not the C-F bond. In a continuous-flow cell, the CoPc/C-driven ECHD reduced the antibacterial activity of a FLO-contaminated natural lake water sample by 90.8 % with an energy consumption of 0.19 kwh g -1 FLO . This study highlighted great promise of the single-atom metal-bearing molecular catalyst toward the sustainable detoxification of halogenated antibiotics-contaminated water.
研究领域:
环境科学
·
催化化学
·
抗生素污染治理
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DOI
高影响因子
DYES AND PIGMENTS
·
2020
·
IF 4.613
Beitong Zhu,Lirong Jiang,Tianhong Chen,Guang-Ming Bao,Lintao Zeng,Xichao Hu,Hou-Qun Yuan
Biogenic primary diamines are a family of critical food spoilage biomarkers. To maintain food safety, it is necessary to implement highly efficient detection methods to monitor the levels of biogenic primary diamines in edible products. In this study, we report a 7-diethylaminocoumarin derivative, CMA-Cl, as a colorimetric and fluorescence lighting-up probe for detecting critical biogenic primary diamines including cadaverine and putrescine. The CMA-Cl probe underwent a nucleophilic substitution and condensation reaction with biogenic primary diamines, generating highly emissive compounds, which displayed strong emission at 475 nm with a fluorescence quantum yield of 36.4%. The CMA-Cl probe showed colorimetric and fluorescence dual-response towards biogenic primary amines with a significant linear relationship, good selectivity, and low limit of detection (209 nM). The probe demonstrated a good recovery (97–122%) for the determination of a typical biogenic primary diamine cadaverine during the spoilage of fish. Furthermore, CMA-Cl -loaded paper was fabricated for the real-time visual detection of a typical biogenic primary diamine cadaverine in fish samples based on distinct changes in color and fluorescence.
研究领域:
食品安全
·
分析化学
·
生物化学
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Lanting Yang,Zhaokang Chen,Lihao Wang,Zhenwei Zhang,Ruihao Wang,Changping Guo
The high sensitivity of high explosive hexanitrohexaazaisowurtzitane (CL-20) limits its applicability, and the performance optimization brought by the synergistic effect between nanothermite and CL-20 is expected to expand its application prospects. In this study, polydopamine (PDA) was introduced to modify CL-20 (denoted as pCL-20), and a quasi-core/shell pCL-20/polytetrafluoroethylene-aluminum (pCL-20/PTFE-Al) composite was successfully prepared by ultrasonic-assisted composite method. The performance characterization results demonstrate that the composite exhibits significantly better decomposition heat release than the mixed sample, a reduction in combustion time from 408 ms to 268 ms, a more stable combustion flame, and more focused energy release. At the same time, the comparison of composite combustion with different condition variables reflects the combustion advantages of the selected proportional conditions in this study. The characteristic drop height (H 50 ) increased from 24.05 cm to 42.15 cm, the explosive percentage of friction sensitivity reduced from 100 % to 70 %, and the sensitivity of the composite sample decreased significantly when compared to the raw CL-20. It improves the combustion performance while reducing the sensitivity, thereby enhancing the application potential and providing a reference for the high-energy desensitization of energetic materials.
研究领域:
材料科学
·
爆炸物化学
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高影响因子
DALTON TRANSACTIONS
·
2014
·Vol. 43
·期 24
·9216-9225
·
IF 4.097
Qiong Wu,Tianfeng Chen,Zhao Zhang,Siyan Liao,Xiaohui Wu,Jian Wu,Wenjie Mei,Yanhua Chen,Weili Wu,Lingli Zeng,Wenjie Zheng
Two arene Ru(II) complexes coordinated by 2-(3-methoxyphenyl)imidazole[4,5-f][1,10]phenanthroline, [(η6-RC6H5)Ru(m-MOPIP)Cl]Cl (R = H, 1; R = CH3, 2), have been prepared under microwave irradiation; the crystal structure of 2 exhibits a typical “piano stool” conformation, with bond angles for N1–Ru1–Cl1 86.02 (14)° and N2–Ru1–Cl1 84.51 (14)°. The Ru–C distance for the Ru atom bound to the benzene ring is about 0.2178(8) nm, and the average Ru–N distance for Ru atom to the two chelating N atoms is about 0.2092(4) nm. The evaluation of in vitro anticancer activities revealed that these synthetic Ru(II) complexes selectively inhibited the growth of HepG2 hepatocellular carcinoma cells, with low cytotoxicity toward LO2 human normal liver cells. The results demonstrated that the complexes exhibited great selectivity between human cancer and normal cells by comparing with the ligand m-MOPIP. Furthermore, complexes 1 and 2 could bind to c-myc G4 DNA in groove binding mode in promising affinity, and the insertion of the methyl groups in the arene ligand contributed to strengthen the binding affinity. This was also confirmed by molecular docking calculation and 1H NMR analysis which showed that both 1 and 2 can bind in the loop constructed by A6–G9 and G21–A25 base pairs in c-myc G4 DNA to block the replication of c-myc oligomer. Taken together, these results suggest that arene Ru(II) complexes display application potential as small molecule inhibitors of c-myc G4 DNA.
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PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Xue Tian,Huan Liu,Bin Cao,Peng Zhang,Yanze Li,Yanchao Ou,Haonan Cui,Mengyao Xu,Bin Xu
MXenes are promising cathodes for Li–CO2 batteries owing to their high electrical conductivity and efficient CO2 activation function. However, the effects of adsorption and electronic structures of MXene on the full life cycle of Li–CO2 batteries have been rarely investigated. Here, we employ a coregulation approach to enhance the adsorption–decomposition of lithium carbonate (Li2CO3) by introducing Zn and Cl surface groups onto the Ti3C2 MXene (Zn–Ti3C2Cl2) catalyst. The incorporation of Cl surface groups enhances Li2CO3 adsorption on the MXene catalyst surface, resulting in the formation of small-sized and uniform Li2CO3. Additionally, the introduction of Zn shifts the d-band centers of titanium and promotes CO2 evolution reaction (CO2ER) activity, thereby facilitating the decomposition of discharge products. As a result, the Li–CO2 battery based on the Zn–Ti3C2Cl2 catalyst exhibits an ultralow overpotential (0.72 V) at 200 mA g–1 and stable cycling for up to 1500 h. This work validates the efficacy of promoting reversibility in Li–CO2 batteries by adjusting the adsorption-decomposition process.
研究领域:
材料科学
·
电化学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）