INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
He Xia,Xiaojie Wang,Jianyong Li,Jianfeng Li,Jia Man
Sodium alginate has good biocompatibility and is widely used in the study of drug carriers. In this paper, a method to prepare calcium alginate microspheres with high sphericity based on double emulsion droplets was proposed, in which sodium alginate is used as the innermost phase. By adjusting the density of the system, the double-emulsion droplets could be suspended in the collecting solution, leading to the homogeneous reaction between the sodium alginate droplets and the calcium ions. By changing the flow rate, the size of the droplets could be changed, and by changing the concentration of calcium ions in the collecting solution, the sphericity of the calcium alginate microspheres could be changed. Then the swelling properties and drug release properties of calcium alginate microspheres were determined. The drug delivery study revealed that the insulin-loaded Ca-Alginate microspheres were able to decrease blood glucose by 41.4 % after oral administration to mice. Thus, the Ca-Alginate microsphere is a suitable candidate for controlled pH-sensitive drug delivery.
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DYES AND PIGMENTS
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2025
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IF 4.2
Jing Zhu,Songfang zhao,Ruifang Guan,Hao Zhang
Heteroatom doping can achieve specific regulation of carbon dots by changing their nanostructure, electronic structure and band gap. Here, we synthesized nitrogen-sulfur co-doped carbon dots (N, S-CDs) with full-spectrum fluorescence emission capability. Through comprehensive structural analysis using XPS, FTIR, and other characterization techniques, it was revealed that most of the nitrogen atoms were integrated into the carbon core of the N, S-CDs. Meanwhile, sulfur atoms were identified on the surface of the N, S-CDs, incorporated as functional groups. This unique structural configuration provides a foundation for understanding the solvent effect on N, S-CDs. Specifically, as the polarity of the solvent increases, the fluorescence emission of the N, S-CDs experiences a red-shift. The varying hydrogen donor abilities of different solvents contribute to changes in fluorescence emission. Notably, N, S-CDs exhibit near-infrared fluorescence emission when dissolved in acetic acid solvent. Under the synergistic effect of solvent polarity and hydrogen bonding, the fluorescence emission of N, S-CDs achieves full-spectrum luminescence, spanning from blue light to near-infrared. It is particularly interesting to observe that when N, S-CDs are dispersed in polyvinyl alcohol (PVA) films by dissolving them in three different solvents, the red, green, and yellow light emission can be achieved. When coated onto Light Emitting Diode (LED) lamp beads, these films exhibit versatile light emission properties. This provides inspiration for the development and preparation of LED fluorescent materials. Meanwhile, thanks to the excellent luminescent properties of N, S-CDs in water, they can be used for targeted localization of lysosomes in biological cells.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Liang Jiang,Long Zhang,Xinjian He,Mengke Tang,Cunmin Wang,Chao Xu,Xiang Li,Xuanjin Zhu,Ruizi Chen,Yifan Zhang,Jiang Shao,Mingming Zhang,Yabin Zhu,Huan Xu
The advent of multifunctional nanofibrous membranes (NFMs) has led to the development of next-generation air filters that are ready to intercept fine particulate matters (PMs) and monitor the respiratory diseases. However, it is still challenging to fabricate biodegradable NFMs featuring the desirable combination of high filtration efficiencies, low air resistance, and intelligent real-time monitoring. Herein, a hierarchical nanopatterning approach was proposed to functionalize the stereocomplexed poly(lactic acid) (PLA) (SC-PLA) nanofibers via the combined electrospinning of SC-PLA and electrospray of CNT@ZIF-8 nanohybrids. The nanopatterned SC-PLA (NSC-PLA) NFMs were characterized by largely increased surface activity and electroactivity, as evidenced by the nearly two-fold increase in surface potential (up to 7.3 kV) and substantial improvements in the dielectric properties. Furthermore, the NSC-PLA NFMs exhibited excellent tribo-output performance, yielding a voltage of as high as 13.5 V for NSC-PLA NFMs loaded 10 % nanohybrids (NSC-PLA10). In particular, the exceptionally high electroactivity and unique protrusion structure together contributed to promote the filtration efficiencies, while providing a low pressure drop (e.g., 96.1 % for PM 2.5 and 88.3 % for PM 0.3 , only 67.6 Pa of NSC-PLA10, at 32 L/min). More importantly, NSC-PLA NFMs enabled real-time monitoring of physiological signals during different respiratory states, as evidenced by the output voltages of 17.2, 32.9 and 37.5 mV for normal breath, fast breath and cough recorded by NSC-PLA10. The proposed NSC-PLA NFMs show enormous potential in the fields of air filtration and real-time respiratory monitoring, thus providing ecofriendly solutions to personal health management.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Huifen Hu,Dong Zeng,Jiang-Bo Ming,Yukun Yan,Wei Wang
Since the discovery of aggregation-induced emission from tetraphenylethylene derivatives, various methods have been explored to prepare highly efficient multicolored luminescent materials. Herein, we report a simple and efficient strategy for constructing luminescent organic salts of the tetracationic luminogen, tetrapyridinium-tetraphenylethylene (T4Py-TPE4+), combined with seven di- and tetra-anionic aromatic sulfonate ligands. When aqueous solutions of the cationic luminogen and the anionic ligands were mixed, they rapidly aggregated into organic salts within seconds to minutes, giving yields of up to >90%. This was accompanied by an increase in the emission efficiency from ∼58% to almost 100%, and the ability to tune the emission color between 511 and 586 nm. These improvements were mainly attributed to the strong electrostatic attractions between the cation and anions, which resulted in the formation of a rigid hydrophobic network of the T4Py-TPE4+ luminogen with various π-conjugation lengths. Because these compounds are commercially available, this method opens the possibility of fabricating novel light-emitting materials for device fabrication and research.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
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IF 6.9
Xiangyang Liu,Jin Wang,Longhui Fang,Yutao Ban,Maogang He
Due to the high Global Warming Potential (GWP) of hydrofluorocarbons (HFCs), the Kigali Amendment to the Montreal Protocol explicitly calls for the phase-out or limited use of HFCs, and the replacement of HFCs by hydrofluoroolefins (HFOs) is imminent. Therefore, it is particularly significant to develop new technology to separate valuable difluoromethane (R32, GWP = 675) from the near-azeotropic refrigerant blend R410A (GWP = 2088), because the traditional distillation is not applicable. In this work, aiming to enhance the separation performance of mixed matrix membrane (MMMs) for R410A, 5-fluorobenzimidazole was introduced into ZIF-71 by the solvent assisted linker exchange (SALE) method for the first time to reduce the pore size of fluorinated ZIF-71 by benzene rings and form hydrogen bonds between R32 with ZIF-71. A novel series of MMMs consisting of fluorinated ZIF-71 and Poly(ether-block-amide) ®1657 (Pebax®1657) polymer were prepared to separate the components of the R410A. The separation performance of the MMMs was investigated at different feed pressures and filler loading. The results showed that the introduction of 5-fluorobenzimidazole contributed to a significant increase in R32 permeability and R32/R125 selectivity of the MMMs compared to pure Pebax membrane. The 15 wt% ZIF-71-F/Pebax MMM showed the best separation performance with R32/R125 selectivity up to 26.6, four times that of pure Pebax membrane and twice that of ZIF-71/Pebax MMM. The ZIF-71-F/Pebax MMM have outstanding data on R32/R125 selectivity and no significant disadvantage in permeability, far exceeding the reported separation performance of membranes for R410A. This confirms that the application of fluorinated metal organic frameworks (MOFs) to the separation of refrigerant blends is a promising strategy.
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MEASUREMENT
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2024
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IF 5.2
Yanyan Wang,Kaikai Zhang,Shengzhe Shi,Qingqing Wang,Chun Wang,Sheng Liu
To better utilize the spectral features of near-infrared and visible light and address issues in traditional suspension particle size detection, such as long measurement cycles, high costs, and complex operation, we propose a new method that combines multispectral sensor characterization technology with machine learning algorithms for rapid particle size measurement. By integrating a lab-designed light source driving circuit and spectral data acquisition device, we obtained 15 spectral data points for visible light, near-infrared, and red–blue–green (RGB) values to build a prediction model. The near-infrared-based model obtained a coefficient of determination (R 2 ) of 0.9130, whereas models combining RGB-near-infrared and visible-near-infrared features performed best, with R 2 values of 0.9670 and 0.9845. These models improved performance by 5.91% and 7.83%, effectively overcoming the limitations of single spectral features in different suspensions. This combination of visible and near-infrared light with machine learning proves effective for detecting average particle size in suspensions.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
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IF 7.8
Shaoxiong Song,Shiyu Dong,Yang Liu,Quanhua Xie,Yuanyuan He,Hassan Karimi-Maleh,Nianbing Zhong
In this study, a tube photocatalytic CO 2 reduction reactor was constructed to in situ online decode the surface CO 2 reduction rates of fixed photocatalysts. The photoreactor consisted of a hollow quartz tube with an inner surface coated with a composite photocatalyst of graphitic carbon nitride (g-C 3 N 4 ) and germanium dioxide (GeO 2 ). Subsequently, a fiber Bragg grating (FBG) CO 2 concentration sensor and its detection system were developed for online and accurate in situ detection of the CO 2 concentration on the surface of the photocatalytic film. The sensor system was then used to monitor the effect of the composition and loading of the photocatalyst on the CO 2 reduction rate inside the reactor, as well as operational parameters such as the light intensity and humidity. The results highlighted that the FBG CO 2 concentration sensor could accurately detect CO 2 concentration changes under variable temperature and humidity conditions, with a detection limit of 82 µM and a response time resolution of 102 s. Under the conditions of excitation light with a wavelength of 380–780 nm, light intensity of 50 W, GeO 2 /g-C 3 N 4 photocatalyst loading mass of 0.1 g, and a relative humidity of 90 % RH, the photocatalytic film exhibited high catalytic activity, achieving a CO 2 conversion produces CH 4 , CO and H 2 at rate of 0.37 mM/h. The research findings provide valuable insights for the design and optimization of CO 2 photocatalytic reduction devices, while also advancing the development of comprehensive on-site monitoring techniques for the photocatalytic CO 2 reduction process.
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Materials Today Communications
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2024
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IF 3.7
Pu Zhao,Zhengwei Li,Zhiwu Xu,Xuesong Liu,Jiuchun Yan
How to obtain a high-strength and corrosion resistance of Al/Sn/Al joint has been a longstanding goal for electronics industry. In this work, 6063Al was joined in the air by ultrasonic-assisted liquid phase diffusion bonding using a Sn filler metal . It was performed by applying an uninterrupted ultrasonic vibration at a heating temperature of 360 ℃, final obtaining a 6063Al joint without enriched-Sn. Under the action of ultrasonic vibrating, the breaking of oxide film , the diffusing of Sn, and dissolving of Al alloy occurred in sequence. It resulted in a transition of bonding interface from Sn/Al to an α-Al/α-Al bonding interface embedded a few Mg 2 Sn partials, after depleting Sn by grain boundary diffusion . The joints possessed a high strength coefficient of 86.7% of 6063Al base metal and 161.8% of soldering joint. The joint had a better corrosion resistance that the tensile strength only reduced 35.3% after a corroding of 72 h in 3.5 wt% NaCl solution in comparison with the soldering joints. Finally, the evolution of the interface structure and mechanism of improving corrosion resistance were discussed in detail. It is a promising technology for manufacturing high-reliable Al/Sn heterogeneous joints.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Liang Zhou,Jie Zhou,Yicen Dong,Yangjie Wu,Zhangying Xi,Zixuan Lu,Juying Lei,Jinlong Zhang,Yongdi Liu
Collaborative treatment of pollutants is a promising approach for wastewater treatment . In this work, a covalent organic framework material (COFs) with an imine structure was synthesised by the Schiff base reaction, and photochemical tests showed good photochemical effects. It was used to explore the photocatalytic treatment of co-existing pollutants (heavy metal ions and antibiotics) and the performance of treating co-existing wastewater was investigated. The degradation performance of levofloxacin (LVX) and Cr(VI) was improved in the coexisting pollutants system, with the LVX degradation being 4.2 times more effective than that of the LVX solitary system. Moreover, this phenomenon was also observed in LVX/Ag(I), LVX/Fe(III), sulfadiazine/Cr(VI), norfloxacin/Cr(VI) and tetracycline/Cr(VI) systems. The analysis of active species suggesting that the synergistic promotion of photocatalytic oxidation-reduction systems was not only promoting from the improvement of simple charge separation, but it was also found that high-valent metal species can act directly in the oxidative decomposition of antibiotics. The interaction of pollutants and intermediates were rationally exploited and confirmed by control experiments and theoretical calculation. This conclusion helps us to re-examine the underlying mechanisms of photocatalytic synchronous oxidation and reduction reactions, simultaneously beneficial for the development of mixed pollutant control processes.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2024
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IF 8.1
Meng-yuan Ding,Ming-ze Jia,Juan Wang
Green hydrogen production from methanol is a pivotal technology for energy transformation. In this work, the heterojunction structure of NiO–TiO 2 and incorporated Pd/Ir/Ru nanoparticles were successfully prepared through the utilization of sol-gel and in situ photodeposition methods. The highest yield of hydrogen from methanol is contributed by 0.5Pd–1Ni–TiO 2 showing 80.73 mmol g −1 H 2 for 4 h, which is 15.03 times higher than the H 2 yield obtained using TiO 2 . Furthermore, this work reveals that methanol adsorbs in two states: molecular CH 3 OH and dissociated CH 3 O∗, and the main adsorption modes of methanol on the surfaces of TiO 2 , 1Ni–TiO 2 and 0.5Pd–1Ni–TiO 2 exhibit similarities, with bridge adsorption being identified as the most favorable mode. The possible mechanism of the formation of main products was proposed. HCOOH is formed by oxidation of HCHO, or from desorption of formate. The two C–C coupling reactions of ·COOH + ·COOH and ·COOH + ·CH 3 produce CH 3 COOH.
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ANALYTICAL CHEMISTRY
·
2024
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IF 6.7
Weibo Gao,Hang Li,Jingxian Yang,Jinming Zhang,Rongxin Fu,Jiaxi Peng,Yechen Hu,Yitong Liu,Yingshi Wang,Shuang Li,Shuailong Zhang
Antimicrobial susceptibility testing (AST) plays a critical role in assessing the resistance of individual microbial isolates and determining appropriate antimicrobial therapeutics in a timely manner. However, conventional AST normally takes up to 72 h for obtaining the results. In healthcare facilities, the global distribution of vancomycin-resistant Enterococcus fecium (VRE) infections underscores the importance of rapidly determining VRE isolates. Here, we developed an integrated antimicrobial resistance (AMR) screening strategy by combining matrix-assisted laser desorption ionization mass spectrometry (MALDI-MS) with machine learning to rapidly predict VRE from clinical samples. Over 400 VRE and vancomycin-susceptible E. faecium (VSE) isolates were analyzed using MALDI-MS at different culture times, and a comprehensive dataset comprising 2388 mass spectra was generated. Algorithms including the support vector machine (SVM), SVM with L1-norm, logistic regression, and multilayer perceptron (MLP) were utilized to train the classification model. Validation on a panel of clinical samples (external patients) resulted in a prediction accuracy of 78.07%, 80.26%, 78.95%, and 80.54% for each algorithm, respectively, all with an AUROC above 0.80. Furthermore, a total of 33 mass regions were recognized as influential features and elucidated, contributing to the differences between VRE and VSE through the Shapley value and accuracy, while tandem mass spectrometry was employed to identify the specific peaks among them. Certain ribosomal proteins, such as A0A133N352 and R2Q455, were tentatively identified. Overall, the integration of machine learning with MALDI-MS has enabled the rapid determination of bacterial antibiotic resistance, greatly expediting the usage of appropriate antibiotics.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Mengke Tang,Xinyi Song,Cunmin Wang,Liang Jiang,Yuhong Zhou,Yuanchunzhi Wang,Jintuo Zhu,Yanqing Wang,Jiefeng Gao,Xinjian He,Huan Xu
The advancement of intelligent and biodegradable respiratory protection equipment is pivotal in the realm of human health engineering. Despite significant progress, achieving a balance between efficient filtration and intelligent monitoring remains a great challenge, especially under conditions of high relative humidity (RH) and high airflow rate (AR). Herein, we proposed an interfacial stereocomplexation (ISC) strategy to facilitate intensive interfacial polarization for poly(lactic acid) (PLA) nanofibrous membranes, which were customized for machine learning-assisted respiratory diagnosis. Theoretical principles underlying the facilitated formation of the electroactive phase and aligned PLA chains were quantitatively depicted in the ISC-PLA nanofibers, contributing to the increased dielectric constant and surface potential (as high as 2.2 and 5.1 kV, respectively). Benefiting from the respiration-driven triboelectric mechanisms, the ISC-PLA demonstrated a high PM0.3 filtration efficiency of over 99% with an ultralow pressure drop (75 Pa), even in challenging circumstances (95 ± 5% RH, AR of 85 L/min). Furthermore, we implemented the ISC-PLA with multifunction respiratory monitoring (response time of 0.56 s and recovery time of 0.25 s) and wireless transmission technology, yielding a high recognition rate of 83% for personal breath states. This innovation has practical implications for health management and theoretical advancements in respiratory protection equipment.
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