ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
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2020
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IF 3.292
Jiaojiao Yin,Li Wang,Sai Li,Feifei Chen,Abeer M. Hegazy,Xuezhen Zhang
The present study investigated the accumulation and depuration effects of hexavalent chromium (Cr 6+ ) in ten tissues (gills, intestines, liver, kidney, blood, heart, bladder, spleen, skin and muscle) of the bighead carp ( Aristichthys nobilis ). Fish were exposed to graded levels of waterborne Cr 6+ (0.01, 0.1, 1 and 5 mg/L) for 4, 7 and 14 days, and subsequently transferred to Cr 6+ -free water for 14 days. After 14-day exposure, a dose-dependent increase of Cr 6+ has been observed in most tissues. While after 14-day depuration, Cr 6+ contents were significantly decreased in various tissues except in kidney and spleen where Cr 6+ contents significantly increased at the group of 5 mg/L. Considering that Cr 6+ highly accumulated in gills, intestines, liver and kidney, the oxidative damage of Cr 6+ on the four tissues were further investigated and found that the antioxidant response to Cr 6+ were organ-specific. The results in this study indicated that a 14-day period is effective for accumulation and depuration of Cr 6+ in bighead carp and there was no health risk of fish muscle consumption. Additionally, the delayed efflux of Cr 6+ in the fish kidney and spleen indicates that high importance should be attached to them when evaluating the toxic effects and risk assessments of Cr 6+ .
研究领域:
环境毒理学
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水生生态学
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渔业科学
✓ 已验证
DOI
PubMed
高影响因子
ChemSusChem
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2019
·Vol. 13
·期 2
·394-399
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IF 7.804
Dengmeng Song,Bo Li,Xin Li,Xuzhuo Sun,Jun Li,Chengbo Li,Tongyu Xu,Yong Zhu,Fei Li,Ning Wang
Graphical Get in or get out : A cobaloxime catalyst and Eosin Y photosensitizer were assembled with macrocyclic cucurbit[7]uril through inclusion and exclusion interactions, respectively. The synchronous self-assembly drove an orthogonal arrangement of the ternary system with significant spatial proximity. The ternary supramolecular system showed better performance for photocatalytic H 2 evolution than multicomponent systems. The fabrication of efficient and convenient photocatalytic H 2 evolution systems is a fascinating research topic in the field of solar energy conversion. A ternary self-assembled photocatalytic H 2 evolution system was fabricated through supramolecular host–guest chemistry. The system consisted of the H 2 evolution catalyst [Co(dmgH) 2 (4-ppy) 2 ]NO 3 ( 1 ; dmgH 2 =dimethylglyoxime, 4-ppy=4-phenylpyridine) and the photosensitizer Eosin Y (EY) assembled with the macrocyclic compound cucurbit[7]uril (CB[7]) to form the 1 @CB[7]/EY complex through inclusion and exclusion interactions, respectively. The synchronous self-assembly drives an orthogonal arrangement of the 1 @CB[7]/EY system. The inclusion complex 1 @CB[7] was successfully characterized by 1 H NMR spectroscopy and single-crystal XRD. The exclusion process of CB[7] with EY was identified by NMR titration and the optimized geometry of the exclusion structure was determined by DFT calculations. The use of CB[7] resulted in a 6-fold increase in turnover number, a 3-fold increase in turnover frequency, and a 3-fold extension of lifetime for photocatalytic H 2 evolution as compared with the system in the absence of CB[7]. The improvement of the light-driven H 2 evolution activity was ascribed to the ability of CB[7] to link the photosensitizer and catalyst.
研究领域:
化学
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材料科学
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可再生能源研究
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
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IF 3.119
Feng Liu,Li Chen,Kangling Yin,Taotao Fan,Zongcheng Yan
To investigate the phase formation mechanism of sugar-based natural deep eutectic solvent (DES) aqueous biphasic systems, an excluded volume theory (EEV) model was extended to the sugar-based (sucrose, glucose, fructose)-choline chloride DES + tert-butyl alcohol and isopropyl alcohol + water systems. In this paper, phase density measurement of sugar-based natural deep eutectic solvents (NADESs) + water-soluble alcohols + water systems revealed that the densities of NADES-rich and alcohol-rich phase presented significant differences. On the basis of these results, a modified EEV model was correlated with the density and phase equilibrium data of each system. Subsequently, the parameters of the excluded volume obtained were used to quantify the interaction force between the NADES and alcohol, and the relationship between parameters and functional groups of phase components was used to explore the mechanism of phase formation and predict the possible liquid structure of the DES-rich phase. The analysis of the Va – DES – w* and fa – DES – w values showed that the interaction between the components of each system was influenced by the functional groups of hydrogen bond donors (HBDs) and alcohols, and it was beneficial to reduce the compatibility of the system and the space unfilled of tight packing of molecules by increasing the number of hydroxyl groups of HBDs and alkyl groups of alcohol, leading to improvement of the phase formation ability. From the analysis of the parameters given by the EEV model, the adjustment of the number of hydroxyl groups of HBDs and alkyl groups of alcohols was beneficial to regulate the biphasic coexistence region of sugar-based DES/alcohol systems.
研究领域:
化学
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物理化学
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Tong Xin,Mingxuan Chen,Zewei Liu,Ruiwen Luo,Qinglei Xing,Peng Bai,Xianghai Guo,Jiafei Lyu
The past two decades have witnessed the potentials of metal–organic frameworks (MOFs) for the adsorptive separation of difficult mixtures due to their designable porosity and significant surface area. In this work, two Zr 6 -based metal–organic framework materials with different pore sizes, NU-906 and NU-1008, were synthesized and evaluated as adsorbents for fructose/glucose separation, which is very important for sustainable biomass utilization. The two materials were characterized and studied, including the kinetics, isotherms, and thermodynamics by batch adsorption experiments, which can be well described by pseudo-second-order kinetics and Langmuir model (NU-906), Freundlich model (NU-1008), and the adsorption mechanism is described in terms of pore exclusion. The experimental results showed that NU-906 exhibited record-breaking adsorption selectivity towards fructose, whose static selectivity factor was up to 13.7. The NU-906 material with expanded particle size was further studied as filling of the chromatographic column for dynamic adsorption, and the dynamic selectivity factor was about 4.0, which was much higher than the column selectivity factor (∼2.5) used in the industry at present. In addition, three adsorption/regeneration experiments demonstrated its reusability.
研究领域:
化学工程
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材料科学
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分离科学
✓ 已验证
产品关联
DOI
高影响因子
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