ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2024
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IF 10.8
Liyuan Wu,Yaxin Liu,Xin Wang,Mengrui Li,Jingya Li,Xiaoran Zhang,Dawen Gao,Haiyan Li
Benzo[a]pyrene is difficult to remove from soil due to its high octanol/water partition coefficient. The use of mixed surfactants can increase solubility but with the risk of secondary soil contamination, and the compounding mechanism is still unclear. This study introduced a new approach using environmentally friendly fatty acid methyl ester sulfonate (MES) and alkyl polyglucoside (APG) to solubilize benzo[a]pyrene. The best result was obtained when the ratio of MES/APG was 7:1 under 6 g/L total concentration, with an apparent solubility (Sw) of 8.58 mg/L and a molar solubilization ratio (MSR) of 1.31 for benzo[a]pyrene, which is comparable to that of Tween 80 (MSR, 0.95). The mechanism indicates that the hydroxyl groups (−OH) in APG form “O–H···OSO2–” hydrogen bonding with the sulfonic acid group (−SO3–) of MES, which reduces the electrostatic repulsion between MES molecules, thus facilitating the formation of large and stable micelles. Moreover, the strong solubilizing effect on benzo[a]pyrene should be ascribed to the low polarity of ester groups (−COOCH3) in MES. Functional groups capable of forming hydrogen bonds and having low polarity are responsible for the enhanced solubilization of benzo[a]pyrene. This understanding helps choose suitable surfactants for the remediation of PAH-contaminated soils.
研究领域:
环境科学
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化学
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DOI
PubMed
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2018
·
IF 1.454
Xiu-mei Tai,Jin-yu Song,Zhi-ping Du,Xiaoying Liu,Tianzhuang Wang,Guoyong Wang
Hydrolytic stability, foaming power and foam stability, calcium soap dispersing ability and stability in hard water of fatty acid methyl ester sulfonate (MES) were measured by potentiometric titration, Ross-Miles foam instrument, improved acid titration and turbidimetric test, respectively. The dishwashing detergent formulations containing MES were designed and stability and detergency of dishwashing detergents have been tested. The results showed that when storage temperature was 45°C, MES in pH 4.5 ∼ 9 was stable, disodium α-sulfonated fatty acid esters content increased at pH 10, hydrolysis rate was accelerated; foaming power of MES was lower than sodium linear alkyl benzene sulfonate (LAS) and the foam stability was equivalent to that of LAS; MES showed very excellent calcium soap dispersing ability, calcium soap dispersing amount of MES was 2.5 g calcium soap /1 g MES and LAS was 0.34 g /1 g LAS; differential stability of MES in hard water was , and LAS was ; the performance test results of dishwashing detergent products partially substituted LAS by MES can both meet the requirements of the Chinese national standard.
研究领域:
化学工程
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表面活性剂科学
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DOI
高影响因子
GLOBAL CHALLENGES
·
2018
·Vol. 2
·期 8
·1800030
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IF 0
Chenchen Feng,Puxian Fang,Yanrong Zhou,Lingzhi Liu,Liurong Fang,Shaobo Xiao,Jiangong Liang
In a previous work, gold nanoclusters (Au NCs) are found to inactivate RNA virus, but the effect of surface modification of Au NCs on its proliferation is still largely unknown. Here, the effect of surface modification of Au NCs on the proliferation of pseudorabies virus (PRV) by synthesizing two types of gold clusters with different surface modification, histidine stabilized Au NCs (His-Au NCs) and mercaptoethane sulfonate and histidine stabilized Au NCs (MES-Au NCs), is investigated. His-Au NCs rather than MES-Au NCs could strongly inhibit the proliferation of PRV, as indicated by the results of plaque assay, confocal microscopic analysis, Western blot assay, and quantitative real-time polymerase chain reaction (PCR) assay. Further study reveals that His-Au NCs perform the function via blockage of the viral replication process rather than the processes of attachment, penetration, or release. Additionally, His-Au NCs are found to be mainly localized to nucleus, while MES-Au NCs are strictly distributed in cytoplasm, which may explain why His-Au NCs can suppress the proliferation of PRV, but not MES-Au NCs. These results demonstrate that surface modification plays a key role in the antiviral effects of Au NCs and a potential antiviral agent can be developed by changing the Au NC surface modification.
研究领域:
病毒学
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纳米生物学
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分子生物学
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DOI
PubMed
ARCHIV DER PHARMAZIE
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2019
·Vol. 352
·期 8
·1800313
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IF 2.145
Ming-Xia Song,Yuping Huang,Shiben Wang,Zeng-Tao Wang,Xian-Qing Deng
A novel series of benzoxazole derivatives containing 1,2,4-triazolone ( 5a-m ) was designed. These compounds were synthesized in order to screen their anticonvulsant activities by the maximal electroshock seizure (MES) model and the subcutaneous pentylenetetrazole (sc-PTZ) seizure model in mice. The rotarod test was used to evaluate their neurotoxicities. Most of the compounds showed anti-MES activities at 100 and 300 mg/kg. Compound 5f , which showed potential anticonvulsant activity in the MES model with ED 50 values of 22.0 mg/kg, was considered as the most promising one in this study. It exhibited greater safety than that of carbamazepine and valproate regarding neurotoxicity. The efficacy of compound 5f in inhibiting the tonic seizures and death induced by the convulsants 3-mercaptopropionic acid and BIC was also verified. In an enzyme-linked immunosorbent assay, compound 5f and the positive drug phenytoin significantly increased the γ-aminobutyric acid (GABA) level in the mouse brain. Further, pretreatment with an inhibitor of the GABA synthesizing enzyme dramatically raised the ED 50 value of 5f in the MES model. These results confirmed that the compound 5f plays its anticonvulsive action via regulating the GABA function in the brain. Also, a docking study of the compound 5f in the benzodiazepine (BZD) binding site of the GABA A receptor confirmed possible binding of the compound 5f with BZD receptors.
研究领域:
药理学
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神经科学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Haoran Sun,Zining Guo,Yulian Wang,Zijian Wang,Xinglong Sun
MES D30 is a green chelating collector that achieves selective separation of magnesite from calcite. • With only a small amount of sodium silicate, a maximum recovery difference of 76.42% was achieved under optimal conditions. • MES D30 exhibits stable chelating adsorption on magnesite, with a 6.7-fold higher binding energy shift for Mg 2+ than for Ca 2+ . • DFT and MD simulations reveal that stable chelate rings form with Mg 2+ on magnesite, while the hydration layer on calcite hinders effective coordination. Selecting the appropriate collector is key to achieving efficient separation of magnesite and calcite. In this study, MES D30 was used as a green chelating collector, and with a small amount of the inhibitor sodium silicate (SS), efficient flotation separation of the two minerals was achieved. Under optimal conditions of 140 mg/L MES D30, 7 mg/L SS, pH 11.0, and 2000 rpm, the difference in recovery between the two minerals reached 76.42%. Contact angle and zeta potential tests indicate that MES D30 significantly increases the hydrophobicity of the magnesite surface and shifts its potential to the negative, while having a negligible effect on calcite; SEM-EDS analysis shows that 3.4% of the characteristic S element was detected on the magnesite surface, compared to only 0.6% on calcite. FTIR confirmed the interaction of MES D30 with magnesite, while XPS revealed that the binding energy shift of Mg 2+ (1.88 eV) is approximately 6.71 times that of Ca 2+ (0.28 eV), indicating a much stronger chemical interaction and the formation of a stable adsorption on magnesite. DFT and MD simulations further revealed that the active sites of MES D30 form a stable chelate structure with Mg 2+ on the magnesite surface, resulting in a higher binding energy; in contrast, the hydration film on the calcite surface hinders the agent's action, leading to a lower binding energy.
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DOI
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 14
·4624-4636
·
IF 6.177
Yi Yang,Weixin Qian,Haitao Zhang,Zhonghao Han,Hongfang Ma,Qiwen Sun,Weiyong Ying
FeMnxZr and FeMnxZr2Na catalysts prepared by coprecipitation and impregnation methods were applied to investigate the promoting effects of Zr on iron-based catalysts for high-temperature Fischer–Tropsch synthesis (HTFT). Ar physisorption and TEM demonstrated that Zr-promoted catalysts have a larger BET surface area and larger pore volume, which are more conducive to the distribution of active phases. Zr promoted the dispersity of iron particles and reduced the grain size of iron particles, resulting in the improvement of the FTS activity. The CO-TPD and MES results revealed that the introduction of Zr promoted the dissociative adsorption of CO, thereby promoting the formation of the active phase χ-Fe5C2 while suppressing the formation of ε′-Fe2.2C and further improving the FTS activity and the selectivity to C2=–C4= in the hydrocarbon distribution. However, the addition of an excessive amount of Zr caused the excess ZrO2 to cover the surface of the active site, inhibiting the CO dissociative adsorption and the formation of χ-Fe5C2, resulting in a decrease in the CO conversion and the selectivity to C2=–C4=. The XPS and H2-TPR results proved the interaction between Fe2O3 and ZrO2. And the Fe–ZrO2 interaction inhibited the coke deposition and aggregation of the Fe species, as confirmed by XRD and TEM, respectively. The FeMn5Zr2Na catalyst exhibited the highest C2=–C4= selectivity of 34.4% at a CO conversion of 96.3%. And FeMn5Zr2Na displayed the highest production of light olefins (441.6 g h−1 kgCat−1), which was significantly higher than FeMn2Na (162.2 g h−1 kgCat−1).
研究领域:
催化
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化学工程
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材料科学
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DOI
高影响因子
JOURNAL OF ETHNOPHARMACOLOGY
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2023
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IF 5.4
Xiaowei Zhang,Liang Zhao,Shixie Xiang,Yiran Sun,Pan Wang,Jenny Jie Chen,Brian Sheng-Xian Teo,Zhishen Xie,Zhenqiang Zhang,Jiangyan Xu
Ethnopharmacological relevance Yishen Tongluo formula (YSTLF) is formulated based on traditional Chinese medicine theory for the treatment of Diabetic kidney disease (DKD) and has been shown to be effective in improving the symptoms of DKD according to the clinical observation. Aim of the study To explore the effect of YSTLF on DKD and figure out whether its effects were due to the regulation Sirt6/TGF-β1/Smad2/3 pathway and promoting degradation of TGF-β1. Materials and methods The extract of YSTLF at 1, 2.5 and 5 g/kg was orally administered to C57BLKS/J ( db/db ) mice for 8 weeks and db/db mice were given valsartan as a positive control. The littermate db/m and db/db mice were given vehicle as the control and model group, respectively. Blood urea nitrogen and serum creatinine were detected and the urinary albumin excretion, urea albumin creatinine ratio was calculated. The histopathological change of renal tissues in each group was determined. Simultaneously, the levels of fibrosis-related proteins and messenger RNA (mRNA) in kidney and high glucose (HG)-induced SV40-MES-13 cells were detected. The roles of YSTLF in regulating of Sirt6/TGF-β1/Smad2/3 signaling pathway were investigated in HG-stimulated SV40-MES-13 cells and validated in db/db mice. Furthermore, the effect of YSTLF on TGF-β1 degradation was investigated in HG-stimulated SV40-MES-13 cells. Results YSTLF significantly improved the renal function in DKD mice. YSTLF dose-dependently attenuated pathological changes and suppressed the expression of type I collagen , alpha smooth muscle actin , type IV collagen , and fibronectin in vitro and in vivo , resulting in ameliorating of renal fibrosis . YSTLF positively regulated Sirt6 expression, while inhibited the activating of TGF-β1/Smad2/3 signaling pathway. TGF-β1 was steady expressed in HG-stimulated SV40-MES-13 cells, whereas was continuously degraded under YSTLF treatment. Conclusions YSTLF significantly ameliorates renal damages and fibrosis may via regulating Sirt6/TGF-β1/Smad2/3 signaling pathway as well as promoting the degradation of TGF-β1.
研究领域:
药理学
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内分泌学
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分子生物学
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中医
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DOI
PubMed
高影响因子
Polymers
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2022
·Vol. 14
·期 17
·3591
·
IF 4.967
Xianyang Li,Yuhui Feng,Tao Yi,Yan Piao,Dong Hyuk Park,Longzhen Cui,Chunzhi Cui
The significance of DNA is no longer limited to its role as a biological information carrier; as a natural polymer, it also become in the field of materials. Single-stranded DNA (ssDNA) molecules with specific sequences can form a G-quadruplex or hairpin-shaped conformation with specific heavy metal ions through coordination bonds. In this study, ssDNA molecules of the four sequences were prepared into hybrid assemblies with one of the famous display materials, the tris-(8-hydroxyquinoline)aluminum (Alq3) semiconductor. Based on these hybrid assemblies, heavy metal ions, namely Pb2+, Hg2+, Cd2+and As3+, were detected individually at the ppb level. Apart from this, in practical application, many samples containing heavy metal ions are digested with acid. By introducing MES buffer solution, the influence of acidity on the fluorescent signal of Alq3was excluded. This strategy showed promising results in the practical application of detecting heavy metal ions in shrub branches and leaves.Keywords:DNA;heavy metal ions;tris-(8-hydroxyquinoline)aluminum
研究领域:
材料科学
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分析化学
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环境科学
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生物技术
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DOI
PubMed
高影响因子
BIOMEDICINE & PHARMACOTHERAPY
·
2024
·
IF 6.9
Juan Chen,Zi-yun Hu,Yu Ma,Shan Jiang,Jiu-yu Yin,Yu-kai Wang,Yong-gui Wu,Xue-qi Liu
Diabetic nephropathy (DN) is one of the serious microvascular complications of diabetes mellitus. During the progression of DN, the proliferation of glomerular mesangial cells (GMCs) leads to the deposition of excessive extracellular matrix (ECM) in the mesangial region, eventually resulting in glomerulosclerosis. Rutaecarpine (Rut), an alkaloid found in the traditional Chinese medicinal herb Fructus Evodiae ( Euodia rutaecarpa (Juss.) Benth.), has many biological activities. However, its mechanism of action in DN remains unknown. This study used db/db mice and high glucose (HG)-treated mouse mesangial cells (SV40 MES-13) to evaluate the protective effects of Rut and underlying mechanisms on GMCs in DN. We found that Rut alleviated urinary albumin and renal function and significantly relieved renal pathological damage. In addition, Rut decreased the ECM production, and renal inflammation and suppressed the activation of TGF-β1/Smad3 and NF-κB signaling pathways in vitro and in vivo. Protein kinase CK2α (CK2α) was identified as the target of Rut by target prediction, molecular docking, and cellular thermal shift assay (CETSA), and surface plasmon resonance (SPR). Furthermore, Rut could not continue to play a protective role in HG-treated SV40 cells after silencing CK2α. In summary, this study is the first to find that Rut can suppress ECM production and inflammation in HG-treated SV40 cells by inhibiting the activation of TGF-β1/Smad3 and NF-κB signaling pathways and targeting CK2α. Thus, Rut can potentially become a novel treatment option for DN.
研究领域:
药理学
·
肾病学
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分子生物学
·
糖尿病
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产品关联
DOI
PubMed
高影响因子
AMERICAN JOURNAL OF CHINESE MEDICINE
·
2024
·
IF 4.8
Xiaowei Zhang,Jiajun Wang,Shixie Xiang,Liang Zhao,Mingzhen Lv,Yafei Duan,Gai Gao,Pan Wang,Jenny Jie Chen,Jiangyan Xu,Zhishen Xie,Zhenqiang Zhang
Diabetic kidney disease (DKD) has become the primary cause of end-stage renal disease (ESRD), causing an urgent need for preventive strategies for DKD. Astragaloside I (ASI), a bioactive saponin extracted from Astragalus membranaceus (Fisch.) Bunge has been demonstrated to possess a variety of biological activities. This study investigates the therapeutic potential of ASI in DKD and the underlying molecular mechanism using db/db mice in vivo and high glucose (HG)-induced SV40-MES-13 cells in vitro . The results indicated that ASI significantly ameliorated renal dysfunction and mitigated the pathological alterations in the renal tissues of db/db mice. Moreover, ASI was found to reduce the levels of renal fibrosis makers and suppress the activation of TGF- β 1/Smad2/3 pathway in both db/db mice and HG-induced SV40-MES-13 cells. Furthermore, ASI downregulated HDAC3 expression, upregulated Klotho expression, and enhanced Klotho release. ASI is directly bound to HDAC3, and the beneficial effects of ASI on Klotho/TGF- β 1/Smad2/3-mediciated renal fibrosis in DKD were reversed by the HDAC3 agonist ITSA-1. In conclusion, ASI attenuates renal fibrosis in DKD, and may act through concurrently inhibiting HDAC3 and TGF- β 1, thereby regulating HDAC3-mediciated Klotho/TGF- β 1/Smad2/3 pathway.
研究领域:
药理学
·
肾病学
·
分子生物学
·
糖尿病
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产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2024
·
IF 7.2
Tianyu Yuan,Dongdong Liu,Qian Li,Meng Wei,Yingbao Sun,Hua Xie,Lina Du,Bochuan Yuan,Pei Deng,Yanli Guo,Yiguang Jin
Corrosive esophagitis (CE) is a severe disease caused by accidental or suicidal ingestion of corrosive chemical agents, leading to serious esophageal stenosis or fibrosis. However, the effective and safe treatment of CE is lacking. Here, a melatonin esophagus stent (MES) was prepared using the stereolithography three-dimensional (3D) printing technology with melatonin, polyethylene glycol diacrylate (PEGDA), polyethylene glycol (PEG) 400, and other additives. The MESs with the Roman columns, caduceus, Pagoda, and mace morphologies were designed and printed, respectively. Pagoda MESs exhibited good mechanical properties, retained in the esophagus for more than 24 h, and showed rapid melatonin release. MESs had high in vitro and in vivo safety. More importantly, the implanted MES was broken down into fragments in the gastrointestinal tract and then completely evacuated from the rat body. The CE rat model was established by injecting a strong alkaline solution into the esophagus. The Pagoda MES was conveniently implanted at the injury position, which remarkably alleviated the CE symptoms, reduced inflammation, and prevented esophagus stenosis and fibrosis. 3D-printed Pagoda MESs hold promise for the treatment of CE.
研究领域:
生物医学工程
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药学
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材料科学
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组织工程
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DOI
高影响因子
JOURNAL OF CATALYSIS
·
2022
·
IF 8.047
Minjie Xu,Xianglin Liu,Guiyao Song,Yingying Cai,Bianfang Shi,Yitao Liu,Xiaoxu Ding,Zixu Yang,Pengfei Tian,Chenxi Cao,Jing Xu
Different iron species exhibit distinct activity and selectivity in CO 2 hydrogenation reaction. Herein, by controlling calcination temperature, Fe-Al interaction in Na promoted Fe-Al catalysts has been regulated, which further leads to various compositions of iron oxide (FeO x ) and iron carbides (Fe 7 C 3 and Fe 5 C 2 ) after CO activation and CO 2 hydrogenation reaction. The phase compositions and structures of Fe-Al catalysts are carefully distinguished by multiple characterizations, including XRD, XPS, MES and TEM, and the reactivity of different phases is studied with the combination of experiments (kinetics, TP and in situ DRIFTS) and Density Functional Theory (DFT) calculations. Our FeAl350 with the highest FeC x content shows the highest CO 2 conversion of 48.2% and the lowest CO selectivity of 10.1%, and FeAl900 with the highest Fe 5 C 2 / FeC x ratio presents the highest C 5+ selectivity of 44.6%. Finally, a correlation between different compositions of iron species with the activity and selectivity of Fe-based for CO 2 hydrogenation to olefins was established.
研究领域:
催化
·
化学工程
·
材料科学
·
环境化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）