JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·Vol. 333
·期 6
·2709-2722
·
IF 1.5
Wang Guohua,He Shan,Xiao Quanjin,Peng Kun,Tang Donghui,Dong Zhitao,Pan Menglu,Li Shiyou
This study investigates the effects of nitrate exposure on the indigenous consortium mediated remediation of uranium-contaminated groundwater. Intermittent experiments reveal that high-nitrate concentrations hinder uranium reduction, whereas using glycerophosphate as carbon source, microbe could immobilize uranium by generating biomineralized precipitates with high crystallinity, and these precipitates exhibited better stability at high-nitrate concentration compared to those formed at low-nitrate condition. We also elucidated the mechanism of uranium removal by microorganisms under different conditions by analyzing changes in solution chemistry, products formed and microbial community structures. This work extends the scope for treating uranium-contaminated groundwater and is important for achieving long-term treatment of uranium contamination.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2025
·
IF 0
Al-Ghamdi Azza A.,Ibrahim Sherif M.,Lu Xingmei,Xin Jiayu,El-Sayed Ibrahim El-Tantawy,Galhoum Ahmed A.,Wageh Swelm.
A sustainable biosorbent, silver nanoparticles-decorated coffee-ground waste (CWAg), was synthesized through a simple in-situ reduction method. CWAg is extensively characterized via SEM–EDX, PZC, FTIR, XRD, HR-TEM, and XPS analyses. The biosorbent was tested to remove chromium (Cr(VI)) and methylene blue (MB) from wastewater, and its antibacterial properties was evaluated. CWAg demonstrated efficient sorption efficiencies, achieving ⁓149.9 mg/g at 323 K and pH: 2.0 for Cr(VI) and ⁓113.4 mg/g at 293 K and pH: 6.0 for MB, at a biosorbent dose of 1 g/L. The equilibration times were 90 and 120 min for Cr(VI) and MB, with half-sorption times (t HST ) of 9.2 and 13.9 min, respectively. The sorption mechanisms were successfully fitted with Sips isotherm and Pseudo-second-order models. Simultaneous sorption of MB and Cr(VI) at pH 2.0 exhibited antagonism, while a synergistic effect was observed at pH 6.0. Desorption and regeneration were achieved using NaOH and HCl solutions for Cr(VI) and MB, respectively. The efficiencies were just reduced by 9–13%. Finally, CWAg exhibited remarkable effectiveness for removing Cr(VI) from complex tannery effluent. Moreover, CWAg demonstrated positive antibacterial effects against both Gram-positive and Gram-negative bacteria, surpassing raw coffee-ground waste, underscoring the significant role of silver nanoparticles in enhancing bacterial inhibition.
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PubMed
JOURNAL OF MATERIALS SCIENCE
·
2012
·Vol. 48
·期 2
·805-811
·
IF 2.015
Wang Shi-Jie,Hu Jiang-Bo,Wang Yin-Yin,Luo Fang
Rare-earth (RE) complexes can be easily adsorbed on the surface of graphene oxide sheets (GOSs) by a simple noncovalent approach. The resulting nanocomposite materials, RE complexes functionalized GOSs, have been comprehensively characterized via transmission electron microscopy, X-ray photoelectron spectroscopy, FT-IR spectra, X-ray diffraction, and thermogravimetric analysis. The luminescence properties of GOSs-RE were also investigated. Under the excitation of UV light, these samples display the characteristic emissions of Eu 3+ ions. The photophysical investigations revealed that the presence of GOSs do not quench the lanthanide-centered luminescence stemming from the characteristic electronic transitions within the 4 f shell of the Eu 3+ ions. The GOSs–RE complex hybrids and their dispersion can emit bright red luminescence. Moreover, the presence of GOSs can elongate the fluorescence lifetime of the RE complexes to 983 μs. These properties make them useful in many practical fields, such as in the lighting and biological labeling.
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JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2012
·Vol. 295
·期 1
·167-177
·
IF 1.52
He F. F.,Wang H. Q.,Wang Y. Y.,F Wang X.,Zhang H. S.,Li H. L.,Tang J. H.
A new complex of N , N ′-bis(3-allyl salicylidene) o -phenylenediamine and thorium(IV) (Th(IV)) was synthesized and used as the functional monomer for a novel Th(IV) magnetic ion-imprinted polymer; this polymer was synthesized using a surface imprinting technique that included the modified magnetic Fe 3 O 4 particle and used tetraethyl orthosilicate, 3-Aminopropyltriethoxysilane and maleic anhydride in the process. The magnetic polymer was characterized using FT-IR, and powder- and single crystal-XRD. The behavior of Th(IV) was investigated using batch experiments. At pH 4.5, the uptake capacity of this adsorbent and that of the non-imprinted polymer was 42.54 and 14.10 mg g −1 , respectively, and the relative selectivity coefficient values of the synthesized adsorbent for Th(IV)/La(III), Th(IV)/Ce(III), Th(IV)/Nd(III), and Th(IV)/U(VI) were 82.2, 93.1, 21.0 and 62.4 times greater than that of the non-imprinted matrix, respectively. In addition, the Th(IV) adsorption process using Fe 3 O 4 @SiO 2 -IIP follows pseudo-second-order reaction kinetics and the Langmuir adsorption isotherm. The thermodynamic parameters also suggest that the adsorption of Th(IV) onto Fe 3 O 4 @SiO 2 -IIPs was a spontaneous and endothermic process.
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Food and Bioprocess Technology
·
2024
·
IF 5.3
Wang Chenwei,Liu Chang
In recent years, there has been a growing interest in advanced packaging films made from natural polymers. These films are integrated with pH-sensitive dyes, aiming to monitor the freshness of food. Specifically, the development of pH-adaptive intelligent packaging films, known as MC 5 /ZA 5 -Anth 3% , involves using methylcellulose (MC) and zinc alginate (ZA) as the foundational materials, with anthocyanins (Anth) serving as the freshness indicators. The production of MC 5 /ZA 5 -Anth 3% films has resulted in improved thermal stability, mechanical properties and water resistance, alongside a reduction in the transmission of ultraviolet–visible (UV–vis) light through the material. Importantly, these color-changing films undergo a noticeable change in color when subjected to pH changes or exposure to ammonia gas, making them suitable for detecting shifts in the pH of foods like pork and shrimp, the presence of volatile nitrogen compounds, and early signs of food degradation. Upon exposure to varying pH buffers, the color indicator film underwent a noticeable transition from a reddish-pink hue to blue, ultimately shifting to blue-green. Consequently, this pH-sensitive color indicator film emerges as a viable candidate for the smart, real-time monitoring of freshness in perishable foods such as pork and shrimp.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 2
·1-11
·
IF 5.3
Zhao Zhe,Li Zhixin,Huang Jiahui,Deng Xiaoyu,Jiang Fan,Han Ray P.S.,Tao Yingzhou,Xu Shaohua
Hyaluronidase (HAase) is an important endoglycosidase involved in numerous physiological and pathological processes, such as apoptosis, senescence, and cancer progression. Simple, convenient, and sensitive detection of HAase is important for clinical diagnosis. Herein, an easy-to-operate multicolor visual sensing strategy was developed for HAase determination. The proposed sensor was composed of an enzyme-responsive hydrogel and a nanochromogenic system (gold nanobipyramids (AuNBPs)). The enzyme-responsive hydrogel, formed by polyethyleneimine-hyaluronic acid (PEI-HA), was specifically hydrolyzed with HAase, leading to the release of platinum nanoparticles (PtNPs). Subsequently, PtNPs catalyzed the mixed system of 3,3′,5,5′-tetramethylbenzidine (TMB) and H 2 O 2 to produce TMB 2+ under acidic conditions. Then, TMB 2+ effectively etched the AuNBPs and resulted in morphological changes in the AuNBPs, accompanied by a blueshift in the localized surface plasmon resonance peak and vibrant colors. Therefore, HAase can be semiquantitatively determined by directly observing the color change of AuNBPs with the naked eye. On the basis of this, the method has a linear detection range of HAase concentrations between 0.6 and 40 U/mL, with a detection limit of 0.3 U/mL. In addition, our designed multicolor biosensor successfully detected the concentration of HAase in human serum samples. The results showed no obvious difference between this method and enzyme-linked immunosorbent assay, indicating the good accuracy and usability of the suggested method. Graphical Abstract
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高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2025
·
IF 3.8
Sha Dandan,Yuan Minghui,Zhang Lin,Li Hongli
Insulin bound with ligand molecules can improve its bioavailability in oral formulations. In this work, the interactions between insulin and bile acids of taurocholic acid (TCA) and glycocholic acid (GCA) are characterized using different mass spectrometry (MS) methods. Electrospray (ESI)–MS analysis revealed that GCA and TCA could interact with insulin individually or together through non-covalent bonds, and the products included mGCA-insulin, nTCA-insulin, and mGCA-nTCA-insulin complexes. Their binding stoichiometry, relative intensity ratio ( IRa ), and binding affinity were determined. ESI–MS/MS data and the calculated association constants both suggest that TCA has stronger affinity to insulin than GCA. The mixtures of various insulin, GCA, and TCA complexes with different charge states were separated, and distinct trend lines were observed using ion mobility mass spectrometry (IMMS). Moreover, liposomes containing insulin and GCA and/or TCA were prepared, and directly characterized using ESI–MS, and the interaction products of insulin with GCA and TCA were found in the liposome formulation. AutoDock was used to simulate molecular binding and select binding sites between insulin and GCA or TCA to explore the interaction mechanisms. The findings in this work could help understand the mechanism of action of insulin protection with bile acids in the body. Graphical
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高影响因子
Science China-Materials
·
2024
·Vol. 67
·期 7
·2302-2310
·
IF 6.8
Ruan Qiaohui,Cui Yanyu,Lin Zhuohan,Zhang Xue,Zhang Xin,Li Yan,Ma Xiang
Chiral colloidal semiconductor magic-sized clusters (MSCs) with dimensions less than 2 nm provide abundant surface binding sites for chiral ligands and thus have great potential for chiral semiconductor nanomaterial applications. However, the preparation and optical characterization of chiral MSCs are rarely reported in the past. In this study, chiral MSCs in a single-ensemble form, containing CdS MSCs with a unique sharp absorption peak at 366 nm and CdSe MSCs at 420 nm, were synthesized for the first time in aqueous solution at room temperature using chiral cysteine as ligands. The optical activity of the prepared chiral MSCs can be easily adjusted by varying the amount of chiral ligands added. The maximum absorption asymmetry factors of the prepared chiral CdS MSCs and CdSe MSCs reach 3.6 × 10 −4 and 5.6 × 10 −4 , respectively. The experiment results indicate that the chiral optical properties of the prepared MSCs may originate from the ligand-induced atomic rearrangement on the surface of MSCs. This study not only provides a general method for obtaining chiral MSCs, but also opens the way for research and applications of chiral MSCs.
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JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Sun Yiwei,Luo Yuting,He Yuyang,Wang Haoxiang,Wang Ruoyu,Lu Mengqi,Li Ke,Wu Siqi,Wei Sucan,Song Huiqiao,Xu Dongpo
A highly efficient electrochemical molecularly imprinted sensor for the detection of chloramphenicol (CAP) was prepared using carbon nanofibers (CNFs). The conductivity and large surface area of CNFs improved the electrochemical detection performance while providing more binding sites for chloramphenicol molecularly imprinted polymers. CNF@MIP was prepared using polypyrene as the functional monomer and chloramphenicol as the template molecule. The electrochemical performance of CNF@MIP was evaluated with cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Under optimized conditions, CNF@MIP exhibited a wide detection range (0.1–100 nM), low detection limit (1.15 pM), and good selectivity, stability, and reproducibility. In addition, CNF@MIP can be used to detect chloramphenicol in milk samples.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2025
·Vol. 23
·期 1
·1-22
·
IF 12.6
Liu Yanhong,Gong Liming,Feng Jing,Xiao Congcong,Liu Chenfei,Chen Bohan,Chen Liqing,Jin Mingji,Guan Youyan,Gao Zhonggao,Huang Wei
Immune checkpoint inhibition (ICI) has become the mainstay of immunotherapy for the treatment of renal cell carcinoma (RCC). However, only a small portion of patients exhibit a positive response to PD-1/PD-L1 blockade therapy and the key reason is that RCC belongs to a vascular-rich tumor for promoting immunosuppression. Specifically, the dysfunctional tumor vasculature hinders effector T cell infiltration and induces immunosuppressive tumor microenvironment via the release of cytokine, which attenuates the therapeutic efficacy of ICI. Therefore, regulating abnormal tumor vasculature may be a promising strategy to overcome the immunosuppressive microenvironment and enhance ICI therapy. Here, we propose an NGR peptide-modified actively targeted liposome (Axi/siRNA PD−L1 @NGR-Lipo) to encapsulate the anti-angiogenic agents Axitinib and PD-L1 siRNA to promote tumor vasculature normalization and relieve immune evasion for enhanced anti-tumor immunotherapy. With NGR-mediated tumor homing and active targeting, Axi/siRNA PD−L1 @NGR-Lipo could act on tumor vascular endothelial cells to inhibit neo-angiogenesis, increase pericyte coverage and vascular perfusion, and normalize the structure and function of tumor blood vessels. Meanwhile, it also enhanced immune effector T cells and NK cells infiltration and reduced the proportion of immunosuppressive T cells including MDSC cells and Tregs, thus improving the tumor immunosuppressive microenvironment. Moreover, Axi/siRNA PD−L1 @NGR-Lipo reduced the expression of PD-L1 protein in tumor cells, restored the recognition and killing ability of cytotoxic T cells, and relieved immune evasion. As expected, Axi/siRNA PD−L1 @NGR-Lipo displayed superior anti-tumor and anti-metastatic efficacy in mice bearing RCC. Overall, this study demonstrated the important potential of regulating abnormal tumor vasculature to reshape the immunosuppressive microenvironment and boost ICI therapy, which represents a promising avenue for the synergistic anti-tumor with cancer immunotherapy. Graphical
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高影响因子
CHEMICAL PAPERS
·
2024
·
IF 2.1
Guo Jinxiu,Kong Tao,Zhang Huaijie,Ma Runtian,Ma Zijun,Hu Bing
The development of rapid and sensitive malachite green (MG) detection methods is particularly important for food safety supervision and ecological protection. Using fulvic acid (FA) as a stabilizer and NaBH 4 as a reducing agent, ellipsoidal gold nanoparticles (AuNPs) with the average particle size of 5–20 nm were successfully prepared. Based on the interaction between fulvic acid protected gold nanoparticles (FA-AuNPs) and MG, the color change of FA-AuNPs from ruby red to blue was observed, the corresponding absorbance ratio change of gold nanoparticles at 611 nm and 529 nm (A611/A529) was also studied. Through the optimization of experimental conditions, the linear relationship between A611/A529 with the concentration of MG was established. The detection limit and linear range of this method were 0.02 μM and 0.04–2 μM, respectively. This method was successfully applied to detect malachite green in three different water samples with the recovery of 97.4–110.8%. Graphical abstract
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RESEARCH ON CHEMICAL INTERMEDIATES
·
2012
·Vol. 38
·期 9
·2237-2243
·
IF 0.697
Zhou Minghao,Xiao Guomin,Hong Mei
(6R)- and (6S)-5,6,7,8-tetrahydrofolic acid were resolved by reversed-phase HPLC on a C-18 column with hydroxypropyl-β-cyclodextrin (HP-β-CD) in the mobile phase. As the concentration of HP-β-CD increased from 0 to 45 mM, resolution increased and retention times decreased dramatically. The influence of different mobile phase pH, column temperature, and some other factors were evaluated, and we obtained the optimal HPLC separation conditions.
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危险品化学品经营许可证（带存储）