CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2023
·
IF 3.8
Sheng Wan,Rong Xie,Jianhong Fan,Kewen Tang
Gold (Au) and palladium (Pd) play an increasing role in the production and human life, therefore, it is of great significance to study their recovery. A 5,11,17,23-tetra-ethylthio-25,26,27,28-tetra-hydroxyl thiacalix[4]arene (TCAET) was synthesized specifically for the capture of Au(Ⅲ) and Pd(Ⅱ) from HCl medium by liquid–liquid extraction. In a 0.1 mol·L –1 HCl medium, the transfer of Au(Ⅲ) and Pd(Ⅱ) from the aqueous phase to the organic phase was highly efficient, with a transfer ratio of 100% for Au(Ⅲ) and 98% for Pd(Ⅱ). Furthermore, the extraction equilibrium time for Au(Ⅲ) was just 5 min. Job's method data demonstrated that TCAET formed complexes with Au(III) and Pd(II) in a ratio of 2:3 and 1:1, respectively, during the extraction process. TCAET showed high selectivity toward Pd(II) and Au(III) over other competing metal ions. Moreover, both Au(Ⅲ) and Pd(II) could be successfully stripped from the loaded organic phases with a 1.0 mol·L –1 thiourea in 0.5 mol·L –1 HCl and 0.5 mol·L –1 thiourea in 0.5 mol·L –1 HCl, respectively. Results obtained from five consecutive extraction-stripping cycles showed good reusability of TCAET toward Au(Ⅲ) and Pd(Ⅱ) recovery. The conclusion can provide a certain reference for thiacalixarene in the recovery of precious metal species.
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FOOD CHEMISTRY
·
2023
·
IF 8.8
Ying Bu,Chaonan Sun,Jiaqi Guo,Wenhui Zhu,Jianrong Li,Xuepeng Li,Yi Zhang
The purpose of this study was to screen and verify salt-enhancing peptides that can effectively reduce sodium consumption from Largemouth bass myosin through virtual hydrolysis, molecular simulation, and sensory evaluation. The human transmembrane channel-like 4 (TMC4) was constructed using Alphafold2, with 93.3 % of amino acids falling within allowed regions. A total of 19 peptides were predicted through virtual hydrolysis and screening. DAF, QIF, RPAL, and IPVM significantly enhanced the saltiness perception, and QIF exhibited the most pronounced effect in enhancing saltiness ( P < 0.05). The residues Ala258, Ser546, Ser603, Phe259, Cys265, Glu539, Lys278 and Ser585 were identified as key binding sites. The TMC4-DAF complex achieved stability after 20, 000 ps, exhibiting an average RMSD value of 0.84 nm. DAF consistently displayed fluctuations at approximately 3.05 nm, and the number of hydrogen bonds varied between 3 and 5. These results suggested that Alphafold2 modelling can be used for predicting salt-enhancing peptides.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Shuai Yan,Haojian Zhang,Renjie Xu,Zonghua Wang
Experimental mole fraction solubility of methyl 2-aminopyridine-4-carboxylate in methanol/ethanol/isopropanol/n-propanol/acetonitrile/toluene/water/N,N-dimethylformamide (DMF) and ethanol/n-propanol/acetonitrile/DMF + water was determined by the isothermal saturation method between 278.15 and 323.15 K at 101.2 kPa. For methyl 2-aminopyridine-4-carboxylate + monosolvents, the increase of temperature was synchronized with the increase of solubility, and the maximum solubility (0.0377 and 323.15 K) was obtained in methyl 2-aminopyridine-4-carboxylate + toluene. For methyl 2-aminopyridine-4-carboxylate + mixed solvents, in addition to temperature, the proportion of cosolvents was also the main influencing factor, and the maximum solubility of methyl 2-aminopyridine-4-carboxylate (0.02845 and 323.15 K) was obtained in DMF + water at wDMF = 0.9. The Jouyban–Acree model (J-A), van’t Hoff–Jouyban–Acree model (V-J-A), and modified Apelblat–Jouyban–Acree model (A-J-A) were utilized to correlate the solubility of methyl 2-aminopyridine-4-carboxylate in four binary solvent mixtures, and Apelblat model, van’t Hoff model, and λh model were used to correlate the methyl 2-aminopyridine-4-carboxylate solubility in eight monosolvents. This study presented insights into modulating a methyl 2-aminopyridine-4-carboxylate crystallization process and understanding equilibrium behaviors in different solvents.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yu-Fei Lin,Yin-Xin Fang,Zhen-Liang Xu,Tian-Xiang Ren,Sun-Jie Xu,Dibakar Pandaya
SUZ-4 zeolite is a needle-like material with an oriented pore structure that has potential for separation. It is desired to prepare high-performance thin film composite (TFC) membranes via the interfacial polymerization (IP) process after incorporating SUZ-4 zeolite interlayers on macroporous ceramic hollow fibers to compensate for the surface defects. However, the incomplete coverage of the needle-like zeolite for the surface seriously affects the performance of the formed membranes. The spatial confinement property of graphene oxide (GO) was used to modify the SUZ-4 zeolite to the SUZ-4(G) zeolite with hierarchical stacked structures and larger size. SUZ-4(G) zeolite achieved sufficient coverage of the alumina substrate and obtained TFC membranes with good performance for isopropanol (IPA) dehydration under the one-pass IP process with ethylenediamine (EDA) and trimesoyl chloride (TMC). The TFC membrane after further optimization displayed a flux of 3.18 ± 0.1 kg/(m 2 ·h) with a separation factor of 3034 ± 98 (the water concentration in permeate was about 99.7 wt%) applied to pervaporation (PV) dehydration of 90 wt% IPA aqueous solution at 60 °C. Additionally, the novel TFC membrane developed has the potential for further applications due to its good stability.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xiaoqin Wei,Hao Guo,Mingyue Wang,Zongyan Lu,Zeyun Yang,Lei Sun,Zhiguo Yu,Yinsheng Liu,Wu Yang
The detection of acetaminophen (ACOP) and its toxic hydrolyzed product p-aminophenol (4-AP) is very significant for clinical diagnosis and quality control of drug formulation. In this study, a novel electrochemical sensor based on MoS 2 embedding triangular Ag nanoplates (Tri-AgNPs) coated MOF-808 was developed for simultaneous and sensitive detection of ACOP and 4-AP. The morphology and structure MOF-808@MoS 2 /Tri-AgNPs nanocomposite were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS) and so on. The electrochemical and electrocatalytic properties of the composite electrode were evaluated by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The experimental results demonstrated that the constructed sensor had excellent electrochemical performance for ACOP and 4-AP detection due to the synergistic interaction among MOF-808, MoS 2 and Tri-AgNPs. The proposed sensor exhibited a wide linear range (1–450 μM) and low limits of detection for detection of ACOP (0.054 μM) and 4-AP (0.046 μM). At the same time, the sensor also showed outstanding repeatability, reproducibility, stability and selectivity . In addition, MOF-808@MoS 2 /Tri-AgNPs/GCE was also employed to determine ACOP and 4-AP in acetaminophen tablets and Yellow River water samples with satisfactory recovery rates, which indicated the feasibility of the developed electrochemical sensor in the actual sample analysis.
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高影响因子
Small
·
2023
·
IF 13.3
Xiaoyu Gu,Chengwei Shan,Xiaowei Xu,Qian Liu,Aung Ko Ko Kyaw
All inorganic perovskite based on CsPbI 2 Br has attracted significant attention due to its relatively thermal stable structure compare to its hybrid counterparts. With a wide bandgap of 1.9 eV and excellent light absorption capability, it has been extensively explored for applications in indoor photovoltaics and as a front absorber in tandem devices. However, the uncontrollable crystallization process during solvent evaporation and thermal annealing leads to both macroscopic defects like cracks and microscopic defects such as voids. In this study, a metastable adduct with lead (II) halides by incorporating 4-tert-butyl pyridine as a volatile Lewis base monodentate ligand in the precursor solution is formed. The strategic preferential decomposition of the adduct during the early-stage low-temperature annealing facilitated the desorption of lead (II) halides, inducing antisolvent-free heterogenous nucleation. This, in turn, promoted crystal growth during subsequent high-temperature annealing, resulting in dense films with low defect density. As a result, a maximum open-circuit voltage of 1.30 V is achieved with the champion power conversion efficiency of 16.5% in CsPbI 2 Br-based perovskite solar cell. The work reveals a new mechanism of using Lewis acid-base adduct to obtain high quality perovskite films other than hindering crystallization in traditional way.
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Zongyan Lu,Hao Guo,Xiaoqin Wei,Lei Sun,Zhilan Pan,Bingqing Liu,Yinsheng Liu,Jiaxi Xu,Jiaying Tian,Wu Yang
In this article, a novel and simple electrochemical sensing platform has been developed for the simultaneous and sensitive determination of acetaminophen (ACOP) and 4-aminophenol (4-AP). The porous covalent organic frameworks (COFs) material with β-ketoenamine-linkage was successfully synthesized via 1,3,5-triformylphloroglucinol (TFP) and 2,6-diaminoanthraquinone (DAAQ) and named as TFP-DAAQ-COF. High conductivity walnut shells-derived carbon (WC), amine-functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) with multiple active sites and TFP-DAAQ-COF were combined to obtain composite materials, which were used to modify bare glass carbon electrodes (GCE) and realize the electrochemical analysis of ACOP and 4-AP. The experiments showed that the composite electrode had a strong synergistic effect and exhibited a good electrocatalytic oxidation ability for the two target analytes. The linearity ranges of ACOP and 4-AP were 0.5 ∼ 200 μM and 1.0 ∼ 250 μM, respectively and the detection limits (S/N = 3) were 0.12 μM and 0.18 μM. In addition, the sensor showed acceptable reproducibility, stability and excellent selectivity. The recovery was satisfactory, when it was used to analyze the contents of ACOP and 4-AP in real samples, indicating that the sensor was feasible in practical applications.
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高影响因子
MOLECULES
·
2023
·Vol. 28
·期 17
·6344
·
IF 4.6
Shuanghui Wang,Chuhong Chen,Yan Lu
Cadmium (Cd), a harmful heavy metal that has no biological purpose, can harm healthy fetal and child development. Epigallocatechin-3-gallate (EGCG), the most abundant polyphenol in tea, has been shown to increase cell viability under Cd exposure and ameliorate Cd-induced kidney injury in adult male rats. Using theCaenorhabditis elegans(C. elegans) model, we demonstrated that EGCG mitigated Cd-induced body size developmental toxicity through a mechanism that did not involve chelation with EGCG and was not associated with Cd accumulation and efflux. Our research indicated that the beneficial effects of EGCG on Cd-induced body size developmental toxicity were associated with the mitigation of endoplasmic reticulum stress. Furthermore, our observations indicate that EGCG reduced Cd-induced developmental toxicity inC. elegansvia the PEK-1/eIF-2α/ATF-4 pathway. Our results provide important evidence for the potential benefits of consuming tea as a detoxification agent.Keywords:tea;EGCG;cadmium;Caenorhabditis elegans;developmental toxicity;endoplasmic reticulum stress
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BIOCHEMICAL PHARMACOLOGY
·
2023
·
IF 5.8
Ziyun Hu,Di Xu,Huihui Meng,Wenya Liu,Qi Zheng,Junsong Wang
4-octyl itaconate (4-OI) is a cell-permeable itaconate derivative with anti-inflammatory and antioxidant properties. However, its therapeutic potential for oxidative stress-induced liver injury remains unknown. This study investigated the hepatoprotective effects and mechanisms of 4-OI against oxidative damage in in vitro and in vivo models. 4-OI attenuated H 2 O 2 -induced cytotoxicity, oxidative stress, and mitochondrial dysfunction in L02 and HepG2 cells. Untargeted metabolomics profiling and pathway analysis identified the PI3K/AKT/mTOR and MAPK pathways as key regulators of 4-OI's protective effects. Specifically, 4-OI induced phosphorylation of AKT and ERK1/2, leading to activation of the Nrf2 signaling pathway. Nrf2 upregulated expression of the mitochondrial deacetylase Sirt3, which subsequently alleviated H 2 O 2 -induced cell injury. In mice, 4-OI reduced acetaminophen (APAP)-induced liver injury as evidenced by attenuated hepatocellular necrosis and decreased serum liver enzymes . It also elevated hepatic expression of Nrf2, Sirt3, p-AKT and p-ERK1/2. Inhibition of AKT, ERK1/2 or Nrf2 blocked the protective effects of 4-OI in vitro, suggesting its antioxidant activity is mediated by activating the Nrf2/Sirt3 pathway via AKT and ERK1/2 phosphorylation. In summary, 4-OI exerted antioxidant and hepatoprotective effects by activating the Nrf2/Sirt3 signaling pathway through AKT and ERK1/2 phosphorylation, which were elucidated using in vitro and in vivo oxidative stress models. This provides novel insights into the mechanisms of 4-OI against oxidative stress-related liver diseases.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 30
·e54085
·
IF 3
Xiao-Peng Wang,Feng-Hang Yao,Jie Chen
In this study, a reactive hindered phenol antioxidant, 3,5-di- tert -butyl-4-hydroxyphenyl methyl isobutylene ester (DBHMIE), was synthesized and used to improve the antioxidant performance of ABS (acrylonitrile-butadiene-styrene terpolymer) resin. The chemical structure of DBHMIE was determined with Fourier transform infrared spectroscopy, 1 H nuclear magnetic resonance (NMR), and 13 C NMR spectroscopy. Moreover, the effects of the DBHMIE content on the antioxidant capabilities, thermal stabilities, tensile strengths, impact strengths, and morphologies of the ABS/antioxidant systems were investigated. The results indicated that the oxidation induction temperatures of the systems increased from 229.7 to 245.4°C as the DBHMIE content was increased from 0 to 0.5 wt%. The 5% mass loss temperature of the system was increased from 338.4 to 347.8°C by the addition of 0.3 wt% DBHMIE. The impact strengths of the systems increased with increasing DBHMIE content up to 0.1 wt% and then decreased. The addition of DBHMIE did not significantly affect the tensile strength of the ABS resin. SEM images showed that the DBHMIE was uniformly distributed in the ABS resin at low DBHMIE contents and agglomerated at high DBHMIE contents.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yifang Lin,Daomiao He,Kezhou Jiang,Renkang Qin,Jingfei Wang,Yumeng Shao,Jiaxin Yan,Ruijin Yu,Dan Zhang,Shouan Xie,Lei Zhao
A new series of red luminescent K 5 La(MoO 4 ) 4 : x Eu 3+ (KLMO: x Eu 3+ ) phosphors ( x = 0.05–1.00 mol) was successfully synthesized by a high-temperature solid phase reaction at a low reaction temperature (600 ℃). The X-ray diffraction (XRD) pattern, photoluminescence properties, thermal quenching mechanism, quantum efficiency, and lifetime decay curves of the phosphors were measured and discussed in detail. The prepared phosphors exhibited strong red-light emission (at 615 nm) upon excitation at 394 nm, attributed to the electric dipole 5 D 0 - 7 F 2 transition of Eu 3+ . The optimal doping concentration of phosphors is 0.8 mol. The quenching temperature of the KLMO:0.80Eu 3+ phosphor was found to exceed 480 K, with high activation energy ( E a ) of 0.43 eV, showing good thermal stability. Impressively, the KLMO:0.80Eu 3+ phosphor with a 0.8 mol concentration of Eu 3+ doping also has an internal quantum efficiency (IQE) of up to 84.5%. The packaged white light emitting diode (w-LED) showed a good color rendering index (CRI) (89), correlated color temperature (CCT) (5117 K), and the Commission International de L′Eclairage (CIE) chromaticity coordinates (0.342, 0.345). Furthermore, the KLMO:0.80Eu 3+ phosphor was surface-functionalized with oleic acid (OA) (KLMO:0.80Eu 3+ @OA) to help better identify Level I-III fingerprint details with high resolution and contrast. The results show that the KLMO:Eu 3+ and KLMO:Eu 3+ @OA phosphors have very promising applications in the w-LEDs and latent fingerprints (LFPs).
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JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 23
·9633-9645
·
IF 4.5
Hu Rongqin,Mu Zhaode,Gong Feng,Qing Min,Yuan Yonghua,Bai Lijuan
Human epididymis protein 4 (HE4) is a highly sensitive and specific biomarker for diagnosing ovarian cancer. In this work, a new electrochemical aptasensor for rapid and sensitive detection of HE4 was constructed. Firstly, metal–organic framework/ketjen black (NH 2 -MIL-53(Al)/KB) composite with abundant amino groups and large specific surface area was prepared as signal amplifier to anchor gold nanoparticles (AuNPs). Subsequently, signal probe (SP) and a large amount of electroactive toluidine blue (Tb) were attached on AuNPs to form the tracer label, producing a distinct electrochemical detection signal. Moreover, Ni 3 (HITP) 2 was modified by poly(diallyldimethylammonium chloride, PDDA) to obtain PDDA/Ni 3 (HITP) 2 , and then it was covered with deposited gold nanocrystals (DpAu) to form the sensing platform, which increased the electrical conductivity, specific surface area and the loading of triple-helix assembled probes (TAP). Target HE4 was bound to its aptamer in the outer layer of the TAP, leaving a separate capture probe (CP) on the electrode surface that can bind with the tracer label. The proposed aptasensor for HE4 detection showed a wide linear range from 1 to 10 nM with a detection limit of 0.41 fM. In addition, the aptasensor has good selectivity, stability and reproducibility. More importantly, this method showed satisfactory results in clinical serum sample analysis compared with ELISA, possessing application prospects in ovarian cancer diagnosis.
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