JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
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IF 2.298
Wenyang Fan,Houchun Yan,Xin Huang,Zhaohui Liao,Qingsong Li,Zhanhua Ma
The liquid–liquid equilibrium (LLE) data of ternary systems n-hexane + 1-hexene + solvents (furfural and N,N-dimethylformamide) were determined experimentally at 298.2, 308.2, and 318.2 K under 101.3 kPa. The solvents’ extraction capacity was assessed by the solute distribution coefficient and selectivity. Othmer-Tobias and Hand equations were used to correlate the measured data to test the correlation of the experimental data, which the linear correlation is (R2) ≥ 0.99. Experimental LLE data was correlated utilizing the NRTL and UNIQUAC thermodynamic models with all of the RMSD and AARD values below 0.01 meaning that each ternary system satisfactory agreement at temperatures studied and the NRTL model gives a better agreement than the UNIQUAC model for ternary systems.
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JOURNAL OF CHEMICAL THERMODYNAMICS
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2018
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IF 2.631
Qingsong Li,Bing Jia,Liping Wang,Mengmeng Yan,Hai Liu,Yingmin Yu
The liquid-liquid equilibrium (LLE) data for the water + 2,2,3,3-tetrafluoro-1-propanol + isopropyl ether/tert-butyl methyl ether ternary systems were measured at 298.2 K and 308.2 K under 101.3 kPa. The distribution coefficients and separation factors were employed to assess the capacity of solvents to extract 2,2,3,3-tetrafluoro-1-propanol from aqueous solution. Meanwhile, the reliability of the experimental data was confirmed using the Bachman and Hand equations. The NRTL and UNIQUAC models were used to correlate the experimental data and relevant binary interaction parameters were regressed. The root mean square deviations (RMSD) of the NRTL and the UNIQUAC models were less than 0.5%, which indicate that the experimental LLE data can be successfully correlated by both models.
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JOURNAL OF MOLECULAR STRUCTURE
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2019
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IF 2.12
Xue-Pu Feng,Xin Na,Ya-Fei Guo,Rui Qian,Jian-Qiang Zhang,Zhen Chen,Rui Yang
1, 2-O, O-Diacetyllycorine (DALY) is one of the lycorine derivatives which has various biological properties. However, the bioavailability and clinical application of DALY was restrained because of its low water solubility and moderate antitumor activities . In order to improve its physicochemical properties, we prepared the inclusion complex of DALY with α-cyclodextrin (α-CD). The inclusion complex was characterized by UV, XRD, DSC , TG, 1 H, 2D NMR spectroscopy and its anticancer activity was evaluated in vitro against the human cell lines HCT116, A549, HepG2 and K562. The results demonstrated that DALY was encapsulated into the cavity of α-CD to form the complexes with 1:1 stoichiometry . The water solubility of DALY significantly increased for about 49 times after the inclusion complexation with α-CD. Furthermore, the cytotoxicity of DALY/α-CD against the examined cell lines was significantly increased for about 80 times compared to that of the free DALY. The improved physicochemical and biological properties of the inclusion complexes will be beneficial for its potential applications in the design and formulation of natural medicines.
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SCIENTIA HORTICULTURAE
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2018
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IF 1.76
Fujuan Wei,Jin Wang,Shuai Huang,Bi Gong
Lilies ( Lilium spp.) are in demand worldwide because of their superior commercial and ornamental value. To develop new and practical preservation technologies, effects of pre-harvest treatment of Promalin (a.i. 1.8% each of 6-benzyladenine (6-BA) and gibberellic acid (GA 4 + 7 )) and 1-Methylcyclopropene (1-MCP) on cut lily under cold storage were investigated. Oriental lily ‘Sorbonne’ was selected for this study. The field plants at coloring stage were sprayed with 25 mg L −1 Promalin, 30 μL L −1 1-MCP additionally, their combination (1-MCP + Promalin) was also tested. Deionized water was used as control. The flower stems were harvested 24 h later and stored at 3 ± 1 °C. Preservation effect and physiological changes, e.g. inflorescence life, flower life, opening rate, dry weight loss rate, respiration rate, ethylene production rate, malondialdehyde (MDA) content, lipoxygenase (LOX) activity, energy metabolism related indexes including adenosine triphosphate (ATP) content, energy charge, activities of ATP synthase (ATPase), succinate dehydrogenase (SDH), cytochrome oxidase (CCO) and Ca 2+ -ATPase were determined. The results showed that 1-MCP or Promalin treatment extended the vase life of stored cut lilies and inhibited the decline of the dry weight of petals, reduced respiration rate, ethylene production rate, LOX activity and the accumulation of MDA. They also maintained the activity of ATPase, Ca 2+ -ATPase, SDH, CCO, ATP content and energy charge of cut lilies at a higher level than control. 1-MCP + Promalin exhibited an additive effect. Combination treatment maintained the flower opening ability as high as 89.3% after five-week storage, control merely maintained it till 3 weeks. These data indicate growth regulators (e.g. 1-MCP or Promalin) can extend the storage life of cut lily ‘Sorbonne’ through cutting down respiration consumption and manipulation of energy balance.
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Nano Energy
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2018
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IF 13.12
Wei Zhang,Yihui Zou,Hongli Liu,Shuai Chen,Xin Wang,Huawei Zhang,Xilin She,Dongjiang Yang
Electrocatalytic hydrogen evolution reaction (HER) plays a critical role in developing hydrogen and fuel cell technologies . At present, only platinum (Pt) and its compounds are thought to be efficient electrocatalysts for HER, particularly at all-pH values. However, the scarcity and high cost of Pt-based catalysts have seriously hindered their practical application in HER. Here, we report a two-step method for synthesizing single-crystalline (Fe x Ni 1-x ) 2 P nanosheets with exposed { 01 1 ¯ 1 ¯ } facets on Ni foam. Compared with pristine Ni 2 P, the (Fe x Ni 1-x ) 2 P nanosheets exhibit a dramatically improved HER activity (an overpotential of 81, 90, 103 mV at 10 mA cm −2 in acidic, neutral and alkaline media , respectively). Based on the density functional theory (DFT) calculations, it is observed that trace Fe-doping can lead to more charge accumulation around P active sites, which accordingly decreases the Δ G H* and Δ G H2O and promotes the catalytic activity .
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
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IF 2.196
Yongzhao Zhang,Xia Guo,Jian Xu,Yuxiang Wu,Meizhen Lu
Liquid–liquid equilibrium (LLE) data was very important for the process design and optimization of 5-hydroxymethylfurfural (5-HMF) production. To provide this fundamental data, experimental liquid–liquid equilibrium data for ternary systems, {water + 5-HMF + 1-butanol}, {water + 5-HMF + isobutanol}, and {water + 5-HMF + methyl isobutyl ketone}, were measured at 313.15, 323.15, and 333.15 K. Partition coefficients were used to assess the extraction capacity of organic solvents in the biphasic systems. 1-Butanol and isobutanol were desirable extractants with good extraction performance and environmental benign properties. The NRTL model was used to correlate the experimental data and the binary interaction parameters were obtained. The average relative deviation was lower than 10%.
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JOURNAL OF CATALYSIS
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2018
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IF 6.759
Yuqing Wang,Li Yan,Cunyao Li,Miao Jiang,Ziang Zhao,Guangjin Hou,Yunjie Ding
Porous organic copolymer (designated as CPOL-BP&P(OPh) 3 ) containing vinyl biphephos moieties and tris(4-vinylphenyl)phosphite (P(OPh) 3 ) moieties was synthesized through a solvothermal copolymerization technique. After metalation with Rh precursor, an efficient heterogeneous catalyst Rh/CPOL-BP&P(OPh) 3 for the hydroformylation of 1-butene is presented with high activity (TOF = 2490.3 h −1 ) and regioselectivity (l:b = 40.0). The Rh/CPOL-BP&P(OPh) 3 catalyst has been investigated by using solid-state 13 C MAS NMR, in situ FT-IR spectroscopy, nitrogen sorption measurements, SEM, TEM, and XPS. Interestingly, in situ FT-IR spectra showed that Rh species tended to coordinate with both two kinds of P species from biphephos and P(OPh) 3 ligands in the Rh/CPOL-BP&P(OPh) 3 polymer frame rather than one kind of them. Therefore, the synergistic effect of three kinds of coordination compound formed between Rh species and both ligands could be responsible for the high activity and regioselectivity observed in hydroformylation of 1-butene.
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CHEMICAL RESEARCH IN TOXICOLOGY
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2018
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IF 3.432
Wenjing Dong,Bingwei Yang,Yawen Wang,Jia Yuan,Yunqi Fan,Erqun Song,Yang Song
Polybrominated diphenyl ethers (PBDEs) are emerging organic environmental pollutants, which were accused of various toxic effects. Here, we studied the role of a potential PBDEs quinone metabolite, PBDEQ, on cytotoxicity, oxidative DNA damage, and the alterations of signal cascade in HeLa cells. PBDEQ exposure leads to reactive oxygen species (ROS) accumulation, mitochondrial membrane potential (MMP) loss, lactate dehydrogenase (LDH) release, increasing terminal transferase-mediated dUTP-biotin nick end labeling (TUNEL) positive foci, and the elevation of apoptosis rate. Furthermore, we showed PBDEQ exposure result in increased DNA migration, micronucleus frequency, and the promotion of 8-OHdG and phosphorylation of histone H2AX (γ-H2AX) levels. Mechanism study indicated that PBDEQ caused poly(ADP-ribose) polymerase 1 (PARP-1) activation and apoptosis-inducing factor (AIF) nuclear translocation. All together, these results confirmed the occurrence of parthanatos-like cell death upon PBDEQ exposure.
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PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Zheng Zhang,Xiao-Xin Kong,Miao Feng,Zhao-Hui Luo,Hui Lu,Gui-Ping Cao
In this Article, TS-1 was successfully synthesized on carbon nanotubes decorated nickel foam via in situ strategy forming the monolithic TS-1 (MTS-1). To the best of our knowledge, situ synthesis of the MTS-1 has not been reported. Carbon nanotubes decorated nickel foam has many aggregated pores (confined pores formed in aggregated structure) and a large surface area, and TS-1 particles could be dispersed on the surface of CNT@NF. MTS-1 had the characteristics of ultrafine nanoparticle and high content of skeleton titanium. High absorptive property and electrostatic interaction between CNT@NF and gels could accelerate the crystallization rate. The TS-1 particles were solidly immobilized on the CNT@NF, and the conversion rate was almost constant even after multiple reactions. The catalyst is easy to separate from liquid products after reaction, which offers an economical application prospect.
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MICROPOROUS AND MESOPOROUS MATERIALS
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2018
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IF 3.649
Zhikun Wang,Wenfeng Han,Haodong Tang,Ying Li,Huazhang Liu
N-doped ordered mesoporous carbons (NOMC) were prepared with mixed solution of urea and sucrose as carbon source and nitrogen source. SBA-15 was adopted as the hard template. The effect of urea to sucrose molar ratio on NOMC was investigated. NOMC samples were characterized by techniques such as BET, TEM, XPS and TG. The catalytic performances of NOMC catalysts were evaluated for the pyrolysis of 1-chloro-1,1-difluoroethane (HCFC-142b, CH 3 CClF 2 ) to vinylidene fluoride (VDF, CH 2 =CF 2 ). The catalytic reactions were carried out at 400 °C and space velocity of 600 h −1 (based on HCFC-142b). The results indicate that NOMC exhibits a stable activity at 400 °C with high HCFC-142b conversion and selectivity to VDF. The textural parameters of NOMC play a major role in VDF selectivity and N species over the carbon surface are responsible for NOMC catalytic performance. Compared with the temperatures of industrial manufacture of VDF at 650–700 °C, the NOMC catalysts provide a promising pathway to produce VDF at much lower temperatures (below 400 °C).
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JOURNAL OF HAZARDOUS MATERIALS
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2015
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IF 4.529
Chao Shan,Zhiyao Ma,Meiping Tong
Poly(1-vinylimidazole)-grafted Fe 3 O 4 @SiO 2 magnetic nanoparticles (FSPV) were developed to remove both free Cd(II) and nitrilotriacetic acid (NTA) complexed Cd(II) from water. The adsorption capacity of NTA-complexed Cd(II) (42.1 mg/g) was larger than that of free Cd(II) (24.8 mg/g). Free Cd(II) and NTA-complexed Cd(II) could be reduced from 50 μg/L to below 5 μg/L within 10 and 20 min, respectively. FSPV could effectively remove trace free and NTA-complexed Cd(II) over broad pH ranges of 5–10 and 5–11, respectively. Moreover, the presence of seven coexisting ions (up to 100 mM) including four cations (Na + , K + , Ca 2+ , and Mg 2+ ) and three anions (Cl − , NO 3 − , and SO 4 2− ) all slightly promoted the removal of both free and NTA-complexed Cd(II) onto FSPV. The removal of free Cd(II) or NTA-complexed Cd(II) was not obviously affected by the presence of Ni(II) and Co(II) (50 μg/L), humic acid (up to 3 mg/L as TOC) or alginate (up to 8 mg/L as TOC). In addition, FSPV could be regenerated with 10 mM HCl in 10 min, and the removal of both types of Cd(II) maintained above 95% in five consecutive adsorption/regeneration cycles. Therefore, FSPV could be utilized as promising adsorbent for both free and NTA-complexed Cd(II).
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PubMed
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INTERNATIONAL JOURNAL OF MINERAL PROCESSING
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2014
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IF 1.461
An Liu,Jin-chuan Fan,Min-qiang Fan
In this study, density functional theory (DFT) calculations are used to investigate the structure-reactivity relationship of dodecylamine (DDA), dodecyl-propyl ether amine and fatty amine ethoxylate (AC1201) molecules as flotation collectors for quartz. The results indicate that these collectors have difficulty forming a covalent bond with the silicon atom on the mineral surfaces, while their protonation species can easily adsorb on quartz surface through electrostatic attraction. Molecular dynamics (MD) simulation has been used to study the adsorption of amine derivative collectors on quartz surfaces at a molecular level. In the consideration of solvation effect, a model close to the realistic flotation system is fabricated. Interaction energies for collector-quartz surface have been determined, based on which, AC1201 is found to be the most effective collector. Trend as obtained from the molecular modeling has been validated by microcalorimetry measurements and flotation studies on quartz with DDA, ether amine and AC1201 at different pH and collector concentrations.
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