PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2022
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IF 7.926
Shinuo Wang,Yinghao Ruan,Haosheng Sun,Ludong Yi,Di Liu,Jun Wang,Zhaohong Zhang,Dawei Fang
Hydrodynamic cavitation (HC) technology with double parallel orifice plates can further enhance the degradation effect and heat generation efficiency and play an important role in practical large-scale organic wastewater treatment and energy saving. In this study, based on the optimal hole numbers in single orifice plate, the influences of the hole number and distribution in double parallel orifice plate on Basic Violet 1 (BV-1) degradation and heat generation are studied in detail. Furthermore, the effects of some experimental parameters (inlet pressure, initial concentration, solution temperature and solution volume) on BV-1 degradation and heat generation in 4 + 4 parallel orifice plate HC system are deeply studied. Then, the effect of added H 2 O 2 on the BV-1 degradation and heat generation is also investigated. In addition, the capturing experiments of free radicals (•OH and •O 2 - ) are carried out. Finally, the BV-1 degradation pathway and possible degradation mechanism are proposed by analyzing the data of UV–vis spectrum, LC-MS and total organic carbon (TOC). The final results show that the solution temperature can be raised from 20.05 °C to 57.71 °C under the experimental conditions of 4 + 4 parallel orifice plates, 3.0 bar inlet pressure , 5.0 L total solution volume and 10 mg/L initial concentration for 90 min continuous circulation and the BV-1 degradation ratio can be achieved by 75.98 %. The system can generate 785.40 kJ heat at 48.50 USD/m 3 cost and achieve 29.09 % thermal efficiency . For 1:30 molar ratio of BV-1 and H 2 O 2 , the solution temperature can be further raised to 63.32 °C in 90 min continuous cycling. 95.38 % BV-1 degradation ratio can be obtained and the 909.72 kJ heat can be generated, reaching the 33.69 % thermal efficiency. It is hoped that this work can provide a new strategy for enhancing the degradation of organic dyes and resource utilization of heat by using double parallel orifice plate HC technology.
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Advanced Optical Materials
·
2022
·Vol. 11
·期 2
·2202353
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IF 10.05
Ziting Yan,Dongdong Chu,Min Zhang,Zhihua Yang,Shilie Pan
Birefringent materials have been used extensively owing to their indispensable role in creating and modulating polarized light, while birefringent materials for deep ultraviolet (DUV, λ < 200 nm) applications are still urgently needed. Herein, a strategy to induce the formation of birefringence-active 1 ∞ [BO 2 ] chains driven by AlO m F n units is proposed for designing DUV birefringent materials, and a new fluoroaluminoborate, Li 0.5 Na 0.5 AlB 2 O 4 F 2 , with aligned 1 ∞ [BO 2 ] chains and an unprecedented [AlO 3 F 3 ] 6− motif is synthesized. The birefringence of Li 0.5 Na 0.5 AlB 2 O 4 F 2 achieves significant enhancement compared with maternal structure LiAlB 2 O 5 due to the optimization of functional units and arrangement via co-substitution and fluorination tactics. The design strategy provides a propitious and feasible way to construct novel structures with excellent optical properties.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2022
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IF 8.025
Fengshu Li,Xin Hu,Liying Qin,Haoshuai Li,Yan Yang,Xiuli Zhang,Jinren Lu,Yiming Li,Mutai Bao
Although exopolysaccharide (EPS) has been applied to various fields, EPS for UVR-mediated oxidative stress repair still needs further exploration. In this study, a novel EPS was isolated from the fermentation medium of Bacillus sp. QDR3-1 and its yield was 4.8 g/L (pH 8.0, 12 % glucose, 30 °C and 6 % NaCl). The pure fraction (named EPS-M1) was purified by DEAE-cellulose and Sephadex G-100 column. EPS-M1 was a heteropolysaccharide composed of Man, Glc, Gal, and Fuc with a molecular weight of 33.8 kDa. Scanning electron microscopy (SEM) observed a rough surface and reticular structure of EPS-M1, and EPS-M1 formed spherical aggregates in aqueous solution observed in atomic force microscopy (AFM). Thermal analysis revealed that the degradation temperature of EPS-M1 was 306 °C. Moreover, methylation and NMR analysis determined that EPS-M1 was consisted of →3)-Man p -(1→, →2,6)-Man p -(1→, →4,6)-Glc p -(1→, →3)-Glc p -(1→, →4)-Gal p -(1→, →4)-Fuc p -(1→, and T-Man p -(1→. Furthermore, the cytotoxicity and the repair ability of UVR-mediated cell damage of EPS-M1 were studied with L929 cells. The results showed that EPS-M1 had good biocompatibility and it could mitigate UVR-mediated cell damage by regulating the levels of cellular reactive oxygen species (ROS), depolarization of mitochondrial membrane potential (MMP) and Caspase-3/7 activity. Overall, the structure analysis and the protective effects of EPS against L929 cells exposed to UVR provided an experimental basis for EPS in practical applications.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Ling Xiong,Liying Ma,Meiqi Zhao,Haojian Zhang,Shaohua Chen
In present work, nanoscale zero-valent iron (nZVI) was successfully stabilized using fulvic acid (nZVI-FA). Shewanella oneidensis MR-1 (MR-1) was used to enhance the reactivity of the nZVI-FA. The results demonstrated that nZVI-FA combined with the MR-1 (nZVI-FA/MR-1) system could effectively solve the aggregation and surface passivation of nZVI, thereby significantly enhancing the reactivity of nZVI for Cr(VI) removal. The Cr(VI) removal efficiency of the nZVI-FA/MR-1 system (100 %) within 24 h was apparently higher than that of the ZVI-FA system (64.43 %). The enhancement of Cr(VI) removal is because fulvic acid (FA) FA can stabilize nZVI against aggregation; MR-1 could rapidly reduce the Fe(III) (hydr)oxides (FeHOs) passivation layers on the surface of nZVI-FA to biogenic Fe(II) [bio-Fe(II)], which in turn reduced Cr(VI). X-ray photoelectron spectroscopy (XPS) analysis revealed that the Fe(II)/Fe(III) ratio (1.20) and Cr(III)/Cr(VI) ratio (2.53) of the precipitates in the nZVI-FA/MR-1 system were much higher than that those in the nZVI-FA system (0.55 and 1.40, respectively). Three-dimensional excitation-emission matrix (3D-EEM) spectral analysis confirmed that tyrosine, tryptophan, and protein-like substances in extracellular polymeric substances (EPSs) from MR-1 are vital for the removal of Cr(VI). The mechanism analysis demonstrated that most Cr(VI) was reduced to Cr(III); Cr(III) existed as Cr 2 O 3 , FeCr 2 O 4 and Cr x Fe 1-x (OH) 3 precipitates, and some of the Cr(VI) was removed from the solution by adsorption and complexation. This study offers a low-cost, efficient, and environmentally friendly strategy to enhance the reactivity of nZVI for Cr(VI) removal, which has broad prospective applications.
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高影响因子
CATALYSIS LETTERS
·
2022
·Vol. 153
·期 4
·1180-1192
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IF 2.936
Xing Xiangying,Wang Huixiang,Shi Jing,Li Penghui,Ren Jingzhao,Wang Liancheng,Zhang Jianli,Liu Zhong,Lv Baoliang
WO x has good performance in olefin epoxidation, however, the presence of a large amount of Brönsted acid on WO x affects the selectivity of epoxy products. In this paper, broken carbon spheres ( b-C spheres) treated with nitric acid were used as support to anchor WO x in dynamic solvothermal process. Based on GC–MS and GC-IR detection, the obtained WO x /C greatly increased selectivity of 1,2-epoxyhexane from 16.0% ( pure WO x ) to 92.1% in epoxidation of 1-hexene. The improvement of WO x performance is attributed to the reduction of Brönsted acid sites and electron cloud density after loading, which may all result from interaction between WO x and oxygen-containing functional groups of b-C spheres. Above changes not only effectively inhibit the hydrolysis of 1,2-epoxyhexane, but also are conducive to nucleophilic reaction of H 2 O 2 to WO x, which is beneficial to the activation of H 2 O 2 . Finally, an epoxidation mechanism with oxygen vacancies as the main route under WO x /C catalysis is reasonably proposed. Graphical Abstract
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Jie Zhang,Yueqi Huang,Baijun Yan
(Sm 1- x Gd x ) 2 Zr 2 O 7 (0≤x≤1) ceramics, a new thermal barrier coating material, are commonly synthesised by chemical coprecipitation and calcination methods. However, when using the chemical coprecipitation method to synthesise ceramic powder, a large amount of strong acids and ammonium hydrate are consumed, leading to environmental pollution and restricting the production of new ceramics. Thus, a cleaner one-step hydrothermal synthesis method is proposed to synthesise (Sm 1- x Gd x ) 2 Zr 2 O 7 (0≤x≤1) thermal barrier coating ceramic powders, which avoids the use of strong acids and reduces the use of ammonium hydrate. Using this cleaner method, pure (Sm 1- x Gd x ) 2 Zr 2 O 7 ceramic powders were synthesised with particle sizes smaller than 1 μm. Subsequently, bulk ceramics were prepared, and the thermophysical properties of the bulk ceramics were determined. The results show that the thermal expansion coefficients of the ceramics changed slightly after 1300 K, and the coefficient values of the ceramics were approximately 11 × 10 −6 K −1 at 1300 K. The thermal conductivities were in the range of 0.95–1.4 W m −1 K −1 from 700 K to 1500 K, which is slightly smaller than that of the ceramic synthesised by the chemical coprecipitation method. These results show that the thermophysical properties of the (Sm 1- x Gd x ) 2 Zr 2 O 7 bulk ceramics synthesised using ceramic powders are satisfactory, further demonstrating that the hydrothermal synthesis process designed in the present study is feasible.
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JOURNAL OF ETHNOPHARMACOLOGY
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2022
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IF 5.195
Jinxia Hou,Lanping Zhong,Jianming Liu,Fanglan Liu,Chunhua Xia
Ethnopharmacological relevance Shengmai formula (SMF) is a classical traditional Chinese medicine prescription, which is widely used in the treatment of cardiovascular and cerebrovascular diseases . Our previous studies have demonstrated that some components in SMF can interact with each other through breast cancer resistance protein , sodium taurocholate co-transporting polypeptide , organic anion transporting polypeptide 1B1 and 1B3. Organic anion transporter 1 (OAT1) is highly expressed in kidney, mediating the elimination of many endogenous and exogenous substances. However, the interaction between the main active components in SMF and OAT1 is not clear. Aim of the study This study aimed to investigate the interactions of the major bioactive components in SMF mediated by OAT1. Materials and methods Four main fractions, namely, ginseng total saponins (GTS), ophiopogon total saponins (OTS), ophiopogon total flavonoids (OTF), fructus schisandrae total lignans (STL), and 12 active components, namely, ginsenoside Rg1, Re, Rd and Rb1, ophiopogonin D and Dˊ, methylophiopogonanone A and B, schizandrol A and B, schizandrin A and B, were selected to explore the interactions of SMF with OAT1 using cell and rat models. Results The above four main fractions in SMF all exhibited inhibitory effects on the uptake of 6-carboxyfluorescein (6-CF), a classic substrate of OAT1. Among the 12 main effective components, only ginsenoside Re , Rd, and methylophiopogonanone A showed inhibition of 6-CF uptake. Additionally, we found that schizandrin B was transported by HEK293-OAT1 cells, and schizandrin B uptake was markedly inhibited by GTS, OTS, OTF, ginsenoside Re, Rd, and methylophiopogonanone A. In rats, ginsenoside Re, Rd, and methylophiopogonanone A jointly increased the AUC (0-t) , AUC (0-∞) , and C max of schizandrin B, but they decreased its clearance in plasma and excretion in urine. Conclusions Ginsenoside Re, Rd, and methylophiopogonanone A were the potential inhibitors of OAT1, and may interact with some drugs serving as OAT1 substrates clinically. Schizandrin B was a potential OAT1 substrate, and its OAT1-mediated transport was inhibited by ginsenoside Re, Rd, and methylophiopogonanone A. OAT1-mediated interactions of the main active components in SMF can be regarded as one of the important compatibility mechanisms of traditional Chinese medicine preparations.
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JOURNAL OF POROUS MATERIALS
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2022
·Vol. 29
·期 5
·1479-1487
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IF 2.523
Ye Tiantian,Liu Hanfang,Wang Fupeng,Xie Huijie,Ran Saisai,Xu Wei,Liu Jia,Li Bin,Lin Haifeng,Chai Yongming,Wang Lei
Here, we demonstrate a simple in situ synthesis of Pd@silicate-1 (S-1), using [Pd(NH 2 CH 2 CH 2 NH 2 ) 2 ]Cl 2 as a metal precursor and steam-assisted crystallization (SAC) method. The ultra-small Pd nanoparticles (NPs) (~ 1 nm) can be successfully in situ encapsulated into the silicate-1 matrix with well dispersion. The obtained Pd@S-1 catalyst possesses high crystallinity, a large specific surface area and pore volume. More importantly, Pd NPs encapsulated into silicate-1 matrix can avoid the aggregation and sintering during catalytic reaction. Meanwhile, micropores of silicate-1 can improve the selectivity of the products in the hydrogenation of biomass furfural. Consequently, Pd@S-1 catalyst shows excellent catalytic activity in the selective hydrogenation of biomass furfural with selectivity of 95.7% and activity of 83.7% in the condition of relatively low temperature (458 K). Therefore, this strategy provides a new idea for the synthesis of molecular sieve supported metal catalysts.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ying Lu,Peng Li,Juan Du,Peng Fu,Jigong Hao,Huarong Zeng,Wei Li
Dielectric capacitors show great potential in superior energy storage devices. However, the energy density of these capacitors is still inadequate to meet the requirement of energy storage applications. In this study, the Bi 0.5 Na 0.47 Li 0.03 TiO 3 - x NaNbO 3 (BNLT- x NN) ceramics were prepared via conventional solid-phase reaction. Results showed that NN can efficaciously enhance the breakdown strength ( E b ) and the relaxation behavior of the BNLT ceramic because of the broken ferroelectric long-range order. When x = 0.3, the maximum E b reached 350 kV/cm, at which the 0.7BNLT-0.3NN ceramic exhibited the high recoverable energy storage density ( W rec ) of 4.83 J/cm 3 and great efficiency ( η ) of 78.9%. The ceramic demonstrated good temperature stability at 20 °C-160 °C and excellent fatigue resistance . Additionally, the 0.7BNLT-0.3NN ceramic presented high power density ( P D ; ∼77.58 MW/cm 3 ), large current density ( C D ; ∼861.99 A/cm 2 ), and quite short discharge time ( t 0.9 ; ∼0.090 μs). These results indicated that the 0.7BNLT-0.3NN material has excellent energy storage properties and various application prospects.
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高影响因子
Evidence-based Complementary and Alternative Medicine
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2022
·
IF 2.65
Fei Kong,Meng Zhao
Myocardial ischemia/reperfusion (MI/R) injury is a common clinical problem after myocardial infarction without effective therapy. Loureirin B (LrB) is a kind of flavonoid with anti-inflammatory and antifibrotic activities. However, the effect of LrB on MI/R and its underlying mechanism remains elusive. In the present study, a mouse model of MI/R was established by coronary artery occlusion. Administration of LrB (0.5 mg/kg or 1 mg/kg) for 4 weeks effectively improved left ventricular (LV) function and reduced myocardial infarction in MI/R mice. MI/R-induced expression of IL-6, TNF-α, and IL-1β in the hearts was reduced by LrB treatment. Histological analysis showed that LrB attenuated myocardial collagen deposition. LrB downregulated fibronectin, collagen I, collagen III, and α-SMA expression. Notably, LrB inhibited the expression of profibrotic plasminogen activator inhibitor-1 (PAI-1), transforming growth factor (TGF)-β1, TGF-β1R, and p-Smad2/3. Consistently, LrB inhibited the activation of TGF-β1/Smad signaling pathway and the expression of fibrosis-related proteins in angiotensin (Ang) II-treated cardiac fibroblasts (CFs). Overexpression of PAI-1 abolished the effects of LrB on Ang II-treated CFs, suggesting that LrB may function through regulating PAI-1. These results indicated that LrB may alleviate MI/R-induced myocardial fibrosis by inhibiting PAI-1/TGF-β1/Smad signaling pathway. Thus, LrB may be a potential drug in the treatment of MI/R injury.
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JOURNAL OF MOLECULAR STRUCTURE
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2022
·
IF 3.841
Xue Li,Jun Wu,Tianjiao Hou,Hongping Li,Lei Wang,Jing Ding,Hui Wan,Guofeng Guan
As a new generation of potential rocket fuel, hypergolic ionic liquids, especially boron-containing hypergolic ionic liquids, have emerged as attractive alternatives for unsymmetrical dimethylhydrazine (UDMH). Herein, a series of bis(1H-1,2,3-triazole-1-yl) dihydroborate (BTDB) hypergolic ionic liquids were successfully synthesized, which had a melting point below -60 °C, high density ranging from 1.134 g/cm 3 to 1.173 g/cm 3 , and superior density-specific impulse from 374.2 to 386.5 s g/cm 3 . In particular, 1,3-diallyl-1H-imidazol-3-ium bis(1H-1,2,3-triazole-1-yl) dihydroborate owned an ignition-delay time of 36 ms and the enthalpy of formation about 1.78 kJ/g, exhibiting that it was a good potential for the rocket fuels.
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高影响因子
JOURNAL OF FOOD SCIENCE
·
2022
·Vol. 87
·期 6
·2417-2426
·
IF 3.693
Erdong Yuan,Miao Zhou,Shiying Nie,Jiaoyan Ren
The interaction between zinc oxide nanoparticles (ZnO NPs) and whey protein (WP) was studied. The gastric epithelial cell line (GES-1) was used to evaluate the toxicity intensity of ZnO NPs. The interaction mechanism of ZnO NPs and WP was studied by spectroscopic techniques. The results showed that the inhibitory effect of ZnO NPs on cells activity could be reduced when added to ZnO NPs at a concentration of 50 µg/ml. The fluorescence quenching mechanism of ZnO NPs on WP is a combination of dynamic and static quenching. The interaction force between ZnO NPs and WP can be considered as H-bond and VdW force, and they have two binding sites. The interaction between WP and ZnO NPs leads to the loosening of the structural skeleton of WP and the extension of peptide chain, which exposes the tyrosine (Tyr) and tryptophan (Trp) hydrophobic groups in the hydrophobic region of protein molecules and reduces the hydrophobicity of the microenvironment. The ZnO NPs might form a complex with WP through H-bond, hydrophobic interactions, and so on, leading to peptide chain rearrangement, and finally causing changes in the secondary structure of α-helix. 1.1 Practical Application This study provides a theoretical basis for future research on the interaction between food ingredients and nanomaterials, the evaluation of toxicity of nanomaterials and the application scope of nanomaterials in food field.
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危险品化学品经营许可证（带存储）