POSTHARVEST BIOLOGY AND TECHNOLOGY
·
2026
·
IF 7.3
Xin Zhang,Dapeng Li,Ke Jiang,Chao Zeng,Mi He,Xiancheng Ma,Chongshan Yang,Ling Li,Tao Wen
Early detection of Bactrocera dorsalis ( B. dorsalis ) infestation in citrus is challenging due to the asymptomatic nature of initial larval stages. Colorimetric sensor arrays (CSAs) are promising for non-destructive detection of B. dorsalis infestations in citrus, yet they still face limitations in reliably identifying the key volatile organic compounds (VOCs) released by infested citrus. In this study, we developed a MOF-enhanced colorimetric sensor array integrating pH-sensitive dyes into ZIF-7 nanoparticles for non-invasive detection. The array detected VOCs associated with early infestation, including D -limonene, decanal, and linalool, identified via GC-MS. The dye/ZIF-7 composite CSA exhibited enhanced sensitivity compared to the pure dye sensor array. Furthermore, across the 4-day test period, infested samples registered a progressive rise in total Euclidean distance (ED) of color change, reaching a 171.7-unit increase over healthy controls on day 4. To enhance the accuracy and efficiency of infestation detection, we implemented a machine-learning pipeline using Dung Beetle Optimizer (DBO) for feature selection and Tree-structured Parzen Estimator (TPE) for hyperparameter tuning. Consequently, the XGBoost classifier achieved a peak test accuracy of 97.15 %, enabling reliable detection during the early stage of infestation. Overall, this study offers a non-destructive and cost-effective approach for batch-mode early detection of B. dorsalis infestation in citrus, advancing the potential for enhanced postharvest monitoring and pest management strategies.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yixuan Jiang,Botao Gao,Yan Dong,Wenzheng An,Juntai Lv,Zehao Kang,Yongbin Zhang,Dongzhi Zhang
The accurate, simultaneous, and in situ monitoring of multiple sweat biomarkers holds great promise for both athletic performance optimization and disease management. Sweat biomarker monitoring using a wearable colorimetric sweat sensor provides a wireless, electronic-free, and battery-free strategy with easy integration with smart mobile devices such as smartphones. However, existing wearable colorimetric sweat sensors still suffer significantly from ambient light interference, sweat pH variation-induced detection errors, and the physiological variability of sweat rate. In this study, we introduce a smart wearable microfluidic colorimetric sensing system (SWSS) that overcomes these challenges by integrating a flexible epidermal patch with an AI-assisted cloud analytical pipeline. The disposable microfluidic patch enables passive sweat collection and features multiplexed colorimetric assays for chloride, pH, urea, and lactate, alongside a microfluidic channel for sweat rate tracking. Images acquired using a smartphone are uploaded and processed through a backend cloud system featuring an AI-powered data processing system. This system automatically corrects the errors caused by varying lighting conditions and varying sweat pH, thus improving detection accuracy significantly. In addition, this sensor system measures and calculates sweat rate from the dye front's displacement in the sweat rate channel, enabling a sweat rate normalization framework which enhances physiological interpretability. Experimental results demonstrate excellent agreement between predicted and true concentrations across all analytes (R 2 ≥ 0.994). The system further supports on-body testing and real-time analysis through seamless smartphone integration. These findings highlight SWSS platform as a promising next-generation platform for accurate and individualized sweat biomarker sensing for human physiological status monitoring.
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Journal of Energy Storage
·
2026
·
IF 10.7
Enda Liao,Ke Zeng,Bifa Ji,Shuhua Guan,Xiaolong Zhou,Sarayut Tunmee,Chamchuang Thitikorn,Ukit Rittihong,Hedeki Nakajima,Keiji Komatsu,Hidetoshi Saitoh,Yongbing Tang
Lithium carbon dioxide (Li-CO 2 ) batteries exhibit an ultrahigh theoretical energy density of 1876 Wh∙kg −1 and enable potential CO 2 capture for carbon neutrality. However, acidic CO 2 reacts with Li-metal anodes (CO 2 shuttle effect), causing pulverization and battery failure. Herein, we propose a separator gas barrier design strategy to address the critical issue of CO 2 shuttle-induced corrosion in Li- CO 2 batteries. The core of this strategy lies in a diamond-like carbon (DLC)-modified separator, which is engineered to possess exceptional gas barrier properties. Theoretical calculations and systematic experimental verifications collectively confirm that this separator efficiently suppresses the CO 2 shuttle effect, fundamentally mitigating Li-anode corrosion. Notably, the Li-CO 2 battery with this separator achieves a long cycle life over 1200 h (500 mAh∙g −1 , no extrinsic metal-based catalyst)—over 5 times longer than that with a pristine separator (240 h). This work provides a novel, universal design paradigm to enhance the cycling stability of metal-gas batteries (e.g., Li-O 2 , Na-CO 2 ), addressing a long-standing challenge in high-performance metal-gas energy storage systems by using separators as “gas barriers” to protect metal anodes.
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ANALYTICAL CHEMISTRY
·
2026
·
IF 7.3
Deng Gaoqiong,Liu Yang,Wang Shuo,Long Wanjun,Wei Liuna,Wang Siyu,Chen Hengye,Xiao Yuxiu,She Yuanbin,Fu Haiyan
The
pronounced lipophilicity and inherent stability of the C–Cl
bond in organochlorine pesticides (OCPs) pose significant challenges
to their simultaneous degradation and visual detection. Herein, we
have developed a visual colorimetric platform for OCP degradation
and detection using nano ZnTPyP. Theoretical calculations and experimental
results reveal that the nature of the substituent plays a critical
role in modulating the catalytic activity of Zn-based porphyrins,
with the strongly electron-withdrawing pyridyl group notably enhancing
their oxidase-like activity. Subsequently, pyridine-substituted zinc
porphyrins effectively catalyze the generation of reactive oxygen
species (ROS) from O 2 , thereby attacking the C–Cl
bonds in OCPs and leading to their degradation. To prevent self-aggregation
and improve analytical performance, we developed a solvent-effect-enabled
exfoliation-convolution strategy to fabricate ZnTPyP hollow nanotubes:
the stacked porphyrins exfoliate in aqueous solution and self-convolute
under surface tension into hollow nanotubes. Upon nano ZnTPyP-mediated
degradation of OCPs, the released H + ions are captured
by bromothymol green (BG), triggering a distinct green-to-yellow color
change. Based on this principle, a rotatable colorimetric device enables
rapid on-site semiquantitative analysis with a detection limit of
0.01 μg/mL. Linear discriminant analysis achieves 100% accurate
differentiation among five structurally similar OCPs. Finally, the
applicability of this device was validated in four different real
samples, such as cabbage, lily, chrysanthemum, and lake water, with
recoveries ranging from 90.20% to 109.40%. This work not only provides
mechanistic insights into porphyrin-based nanozymes for pollutant
degradation but also establishes an integrated platform for simultaneous
OCP degradation and on-site visual detection.
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Journal of Agriculture and Food Research
·
2023
·
IF 3.8
Simin Fan,Honglei Mu,Haiyan Gao,Hangjun Chen,Weijie Wu,Xiangjun Fang,Ruiling Liu,Ben Niu
Intelligent packaging was prepared and evaluated to determine the quality of shiitake mushrooms using colorimetric sensing. Bromothymol blue/methyl red composite dyes were incorporated into polyvinyl alcohol (PVA) to form a porous indicator via freeze-drying. The PVA indicator was then modified with polylactic acid (PLA). The porous structure of the indicator was investigated using scanning electron microscopy (SEM) imaging, and it was found that the hydrophobicity of the PVA/PLA indicator was significantly improved following modification. A sensitive colorimetric response toward the presence of CO 2 in packaging was achieved using the naked eye. During investigations into the potential application of this system, the ΔE value of the indicator was found to correlate significantly with the quality indices (i.e., the browning index, firmness value, malondialdehyde content, and sensory score) of shiitake mushrooms during storage. Based on these correlations, qualitative identification of the freshness of shiitake mushrooms was studied using principal component analysis, while a prediction model of this freshness was obtained by partial least squares regression. This indicator, therefore, shows potential for application in intelligent packaging for the detection of CO 2 due to the clear visualization of color changes by the naked eye.
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OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Xiaodan Gou,Jinglan Huo,Qing Yang,Yang Cheng,Xun Hou,Feng Chen
Bubbles are an important medium to increase the efficiency of gas/liquid mass transfer. Smaller and more homogeneous bubbles can improve environmental treatment efficiency, microfluidic stability, and medical imaging capabilities. At present, it is still difficult to produce uniform micro bubbles and stably apply them into complex environment. Herein, a strategy of aerating micro bubbles by designing four different structures via laser ablation is proposed. The underwater superaerophobic polyimide (SPI) with micro volcano-like channels has been verified to produce bubbles with a volume of nanoliter. It is attributed to the combination of the micro-nano rough structures covering the surface and the micro-volcanic structure limiting the expansion of bubbles. The SPI with micro volcano-like structure, as a porous aeration film, can make various gases pass, which can be applied to water purification and gas detection. It is also found that the designed SPI with micro volcano-like structure can resist the damage of complex application environments, such as extreme water environments and ultraviolet radiation. As indicated in all the results, the SPI is applicable and flexible. The femtosecond laser can realize high precision and good controllability of the superaerophobic surface, which is difficult for other traditional methods to fabricate micropores. This distinctive membrane provides a new inspiration to design advanced materials for applications in gas transport and collection, wastewater treatment, and chemical reactions. It is also helpful to promote the basic research and applications of micro and nano bubbles generation.
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RSC Advances
·
2023
·Vol. 13
·期 14
·9347-9352
·
IF 3.9
Yu-Fen Bao,Yi-Jie Wang,Yu-Chen Wang,Ding-Hua Liu
In the synthesis of dimethyl carbonate (DMC) by transesterification, CH3ONa has been commonly applied as a homogeneous catalyst due to its high catalytic activity, but its stability is unsatisfactory. Here, by studying the influence of ionic liquid base strength on transesterification, we prepared an organic base catalyst, potassium imidazole (KIm), with high catalytic activity and stability, which solved the problem of catalyst deactivation in transesterification. The results showed that when KIm was used in the synthesis of DMC from propylene carbonate (PC) and methanol (MeOH), the chemical equilibrium could be reached within 3 minutes and the yield of DMC reached 73.03%, indicating that KIm performed better in transesterification than the majority of previously reported catalysts. In addition, the activity of the catalyst had hardly decreased after ten cycles of reaction, which can well meet the requirements of industrial production.
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PubMed
高影响因子
ANALYST
·
2023
·Vol. 148
·期 6
·1265-1274
·
IF 4.2
Yongliang Dong,Jiali Zhai,Ziwei Zhang,Can Peng,Yunjing Zhang,Zipin Zhang
Based on the pKa determination of cyclovirobuxine D (CVB-D) using the method of potentiometry, we predicted the ionization state of CVB-D at physiological pH. Thus, by taking advantage of the ionization state and consequent non-covalent interactions between protonated CVB-D and deprotonated polymerized bromothymol blue (poly-BTB) under physiological conditions, we developed a simple and reusable electrochemical sensor that contains a poly-BTB/SWNT-modified electrode for electro-inactive CVB-D detection in biological fluids using poly-BTB as both the recognition unit and the electrochemical probe. Upon being immersed in the solution of CVB-D, the poly BTB-based electrode shows a current decrease due to the interaction-driven binding of CVB-D on the electrode surface. The current decrease in the electrochemical sensor toward CVB-D concentration shows a linear relationship in the dynamic ranges of 0.01–1 μM and 1–50 μM with a detection limit of 1.65 nM based on 3σ. The sensor can be easily regenerated through the removal of the binding of CVB-D from the electrode surface by highly negatively charged heparin, and it presents high repeatability with an RSD of less than 4.0% for seven measurements. In animal experiments, the electrochemical sensor was selective and sensitive for CVB-D determination in plasma and liver homogenates. The electrochemical sensor is readily accessible, robust, and cost-effective and holds good promise for more applications in biological and clinical fields associated with CVB-D using less technically demanding and simple operating procedures.
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ACS Omega
·
2022
·
IF 4.132
Xiaolu Xiong,Chengwang Guo,Gengyang Yan,Bingxin Han,Zan Wu,Yueqian Chen,Shiqi Xu,Peng Shao,Hong Song,Xiyan Xu,Junfeng Han
Water quality guarantee in remote areas necessitates the development of portable, sensitive, fast, cost-effective, and easy-to-use water quality detection methods. The current work reports on a microfluidic paper-based analytical device (μPAD) integrated with a smartphone app for the simultaneous detection of cross-type water quality parameters including pH, Cu(II), Ni(II), Fe(III), and nitrite. The shapes, baking time, amount, and ratios of reaction reagent mixtures of wax μPAD were optimized to improve the color uniformity and intensity effectively. An easy-to-use smartphone app was established for recording, analyzing, and directly reading the colorimetric signals and target concentrations on μPAD. The results showed that under the optimum conditions, the current analytical platform has reached the detection limits of 0.4, 1.9, 2.9, and 1.1 ppm for nitrite, Cu(II), Ni(II), and Fe(III), respectively, and the liner ranges are 2.3–90 ppm (nitrite), 3.8–400 ppm (Cu(II)), 2.9–1000 ppm (Ni(II)), 2.8–500 ppm (Fe(III)), and 5–9 (pH). The proposed portable smartphone-app integrated μPAD detection system was successfully applied to real industrial wastewater and river water quality monitoring. The proposed method has great potential for field water quality detection.
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GIANT
·
2023
·
IF 7
Yongxin Yang,Yunqing Gu,Kunyu Chen,Jiajia Luo,Zijuan Cheng,Yiyun Cheng,Jingjing Hu
Polymyxins are credited as the last line of defense against the clinical multi-resistant Gram-negative pathogen infections. However, their clinical use is limited by high nephrotoxicity and neurotoxicity, and less effectiveness against mature biofilms. In this work, the polymyxins including polymyxin B and polymyxin E were crosslinked with oxidized dextran via the acid labile Schiff base linkage. The generated hydrogel can release the polymyxins upon bacterial infection in an on-demand manner, which may alleviate adverse effects of the antibiotics. Moreover, a multifunctional hydrogel is generated by introducing the enzyme cellulase into the polymyxin hydrogel via the same Schiff base chemistry. The prepared gel can effectively degrade the mature biofilm, sensitizing the polymyxins in the treatment of biofilm-associated infections both in vitro and in vivo . This study provides an effective strategy to reduce the side effects of polymyxins and enhance their sensitivity against the mature biofilm-associated localized infections.
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Journal of Chemistry
·
2022
·
IF 3.241
Yan Jin,Xinyuan Wang,Ya-Ping Dong
The Yellow River is very important for human health and social development in China to require good water quality. This study selected the Ningxia section of the Yellow River as the study area to investigate the water quality variation in 2016–2020. A total of 9 water quality parameters were monitored, and 8 parameters including pH, dissolved oxygen, biological oxygen demand, chemical oxygen demand, total phosphate, fluoride, ammonia-nitrogen, and permanganate index were in the range of Class II standard requirement. Dissolved oxygen concentrations ranged from 7.5 to 9.4 mg/L. However, total nitrogen concentrations in 2018–2020 ranged from 1.87 to 2.8 mg/L to cause the pollution. Both the Nemerow index method and the contamination degree method showed that total nitrogen with high concentration exerted the water pollution. Principal component analysis also proved this. Stricter environmental management strategies for controlling total nitrogen should be taken in the future. The findings provided some useful information for water pollution of the Ningxia section of the Yellow River.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Ya Gao,Xinzhuang Fu,Zujiang Pan,Tong Yue,Wei Sun
Although the relevant direct and revers flotation mechanism has been discussed a lot in diaspore and kaolinite separation, the quantitative analysis of surface-active sites and their reaction descriptions during flotation have not been reported yet. In this study, the hydration and collector adsorption reactions of anionic sodium oleate (NaOL) and cationic hexadecyl trimethyl ammonium bromide (CTAB) onto diaspore and kaolinite were quantized. Surface complexation model (SCM) was referred to obtain intrinsic reaction equilibrium constants. It can be found that for NaOL adsorption, the equilibrium constant of diaspore (10 13.55 ) was obviously bigger than that of kaolinite (10 11.76 and 10 10.35 for ≡AlOH and ≡SiOH, respectively), corresponding to direct flotation of bauxite. While the interaction (10 3.90 for ≡XNR) between the permanent negatively charged site ≡X − and CTAB was much stronger than other sites. Besides, the single adsorbed amount in mixed minerals were successfully predicted at ratios of 1:2, 1:1 and 2:1. Finally, the fitted potential curves were also acceptable to zeta potential tests. These conclusions from SCM calculation can provide strong supports for collector adsorption differences and then help for separation much more efficiently and economically through saving preliminary exploration cost.
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