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A photo-degradable BODIPY-modified Ru(ii) photosensitizer for safe and efficient PDT under both normoxic and hypoxic conditions

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DALTON TRANSACTIONS 2024年第8期53卷 3579-3588页

作者： Peng, Yatong Da, xuwen Zhou, Wanpeng Xu, Yunli liu, Xiulian Wang, Xuesong Zhou, Qianxiong Tech Inst Phys & Chem Chinese Acad Sci Key Lab Photochem Convers & Optoelect Mat Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Photodynamic therapy (PDT) is promising for cancer treatment but still suffers from some limitations. For instance, PDT based on O-1(2) generation (in a type-II mechanism) is heavily dependent on high oxygen concentrations and will be significantly depressed in hypoxic tumors. In addition, the residual photosensitizers after PDT treatment may cause severe side-effects under light irradiation. To solve these problems, herein a BODIPY (boron dipyrromethene)-modified Ru(II) complex [Ru(dip)(2)(tpy-BODIPY)](2+) (complex 1, dip = 4,7-diphenyl-1,10-phenanthroline, tpy = 2,2':6',2''-terpyridine) was designed and synthesized. Complex 1 exhibited both high singlet oxygen quantum yield (Phi = 0.7 in CH3CN) and excellent superoxide radical (O-2(center dot)-) generation, and thus demonstrated efficient PDT activity under both normoxic and hypoxic conditions. Moreover, complex 1 is photo-degradable in water, and greatly loses its ROS generation ability after PDT treatment. These novel properties of complex 1 make it promising for efficient PDT under both normoxic and hypoxic conditions with reduced side-effects.

关键词： Photosensitizers

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Highly Robust,Compressible,Anisotropic,and Fire-Retardant Polyimide/Hydroxyapatite Nanowires/Reduced Graphene Oxide Aerogel for Rapid Adsorption of Viscous Oil Assisted by Sunlight

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Research 2024年第4期7卷 58-70页

作者： Pan Huang Yongxiang Sun Lin Yang Haoyu Yang Ying Hu Jifang liu xuwen Peng Hongbo Zeng Department of Chemical and Materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada Heavy Machinery Engineering Research Center of Education Ministry Taiyuan University of Science and TechnologyTaiyuan 030024China Cancer Center The Fifth Affiliated HospitalGuangzhou Medical UniversityGuangzhou 510700China Department of Chemical Engineering Tsinghua UniversityBeijing 10084China

Improving the adsorption efficiency of porous adsorbent materials for organic liquids with high viscosity is crucial for addressing oil spill *** this study,a high-performance aerogel adsorbent composed of polyimide(PI),hydroxyapatite nanowires(HAPnws),and reduced graphene oxide(rGO)has been fabricated,which leverages reduced flow tortuosity through anisotropic structures and solar-assisted viscosity reduction via photothermal *** prepared anisotropic PI/HAP/rGO aerogel,with directional channels,shows unique mechanical properties with high stiffness along the axial direction and compressibility along the radial direction.

关键词： nanowires viscosity adsorbent

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Assessing the impact of marketization on energy poverty

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ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY 2025年第4期27卷 9257-9286页

作者： Shi, Xinjie Zeng, Pei Cui, liu Gao, xuwen Qiu, Tongwei Jiang, Qiang Fu, Linlin China Acad Rural Dev Zhejiang Univ Sch Publ Affairs Hangzhou Peoples R China Zhejiang Univ Res Ctr Common Prosper Innovat Ctr Yangtze River Delta Future Reg Dev Lab Jiaxing Peoples R China Zhejiang Univ & Huzhou City Ctr Common Prosper Huzhou Peoples R China Zhejiang Univ Inst Common Prosper & Dev Hangzhou Peoples R China Nanjing Agr Univ Coll Econ & Management Nanjing Peoples R China Guangxi Univ Sci & Technol Sch Econ & Management Liuzhou Peoples R China Zhejiang Acad Agr Sci Inst Rural Dev Hangzhou Peoples R China

In conjunction with economic growth, improving the quality of life for its citizens is a central concern for the Chinese government. Energy poverty, a topic closely linked to people's quality of life, has garnered global attention. This study examines the relationship between marketization and energy poverty by constructing provincial-level panel data using the fixed effect model. To address endogeneity, the instrumental variable method is further employed. The study obtains two major findings. First, the study reveals a significant upward trend in marketization in China in recent years, with a concomitant decrease in energy poverty. Here, the causal (and negative) effects of marketization on energy poverty are identified. Second, the mechanism analysis shows that this effect operates through (i) improvements in the quantity of energy supply (rather than energy supply efficiency), (ii) the accumulation of human capital that promotes the use of clean energy, and (iii) an increase in people's income. This study makes three key contributions. First, it empirically analyzes the impact of marketization on energy poverty from a macro-perspective. Second, it systematically discusses the pathways through which marketization operates. Third, drawing on several theories, it provides a deeper understanding of the theoretical connection between marketization and energy poverty.

关键词： Energy poverty Marketization Instrumental variable China

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GhEXL3 participates in brassinosteroids regulation of fiber elongation in Gossypium hirsutum

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PLANT JOURNAL 2024年第2期120卷 491-504页

作者： Zhang, Changsheng liu, Zhao Shu, Sheng Li, Xinyang Li, Yujun liu, Le liu, Li Wang, xuwen Li, Fuguang Qanmber, Ghulam Yang, Zuoren Zhengzhou Univ Sch Agr Sci State Key Lab Cotton Biobreeding & Integrated Util Zhengzhou Res Base Zhengzhou Peoples R China Chinese Acad Agr Sci Inst Cotton Res State Key Lab Cotton Biobreeding & Integrated Util Anyang Peoples R China Chinese Acad Agr Sci Western Agr Res Ctr Changji Peoples R China Xinjiang Acad Agr & Reclamat Sci Cotton Res Inst Northwest Inland Reg Key Lab Cotton Biol & Genet B Shihezi Peoples R China

Cotton fiber (Gossypium hirsutum) serves as an ideal model for investigating the molecular mechanisms of plant cell elongation at the single-cell level. Brassinosteroids (BRs) play a crucial role in regulating plant growth and development. However, the mechanism by which BR influences cotton fiber elongation remains incompletely understood. In this study, we identified EXORDIUM-like (GhEXL3) through transcriptome analysis of fibers from BR-deficient cotton mutant pagoda 1 (pag1) and BRI1-EMS-SUPPRESSOR 1 (GhBES1.4, encoding a central transcription factor of BR signaling) overexpression cotton lines. Knockout of GhEXL3 using CRISPR/Cas9 was found to impede cotton fiber elongation, while its overexpression promoted fiber elongation, suggesting a positive regulatory function for GhEXL3 in fiber elongation. Furthermore, in vitro ovule culture experiments revealed that the overexpression of GhEXL3 partially counteracted the inhibitory effects of brassinazole (BRZ) on cotton fiber elongation, providing additional evidence of GhEXL3 involvement in BR signaling pathways. Moreover, our findings demonstrate that GhBES1.4 directly binds to the E-box (CACGTG) motif in the GhEXL3 promoter region and enhances its transcription. RNA-seq analysis revealed that overexpression of GhEXL3 upregulated the expression of EXPs, XTHs, and other genes associated with fiber cell elongation. Overall, our study contributes to understanding the mechanism by which BR regulates the elongation of cotton fibers through the direct modulation of GhEXL3 expression by GhBES1.4.

关键词： cotton fiber brassinosteroids GhEXL3 GhBES1.4 cell elongation

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A low-temperature process for lithium extraction from lithium-bearing mineral: Conversion behavior and mechanisms

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SEPARATION AND PURIFICATION TECHNOLOGY 2025年 357卷

作者： Luo, Shaojun Zheng, Xiaohong liu, Haichao Zhang, Qing He, Mingming Wang, Yuehai He, xuwen Sun, Zhi China Univ Min & Technol Beijing Sch Chem & Environm Engn Beijing 100083 Peoples R China Chinese Acad Sci Inst Proc Engn Natl Engn Res Ctr Green Recycling Strateg Met Res Beijing 100190 Peoples R China China Univ Geosci Beijing Sch Mat Sci & Technol Beijing Key Lab Mat Utilizat Nonmet Minerals & Sol Natl Lab Mineral Mat Beijing 100083 Peoples R China Shanghai Polytech Univ 2360 Jinhai Rd Shanghai 201209 Peoples R China

Lithium extraction from lithium-bearing clay mineral (LiBC) has received significant attention due to the increasing demand of lithium for the advanced renewable energy industry. However, the low contents of valuable elements and stable physiochemical properties of LiBC result in high energy consumption and low efficiency in extracting lithium from LiBC. This study demonstrates a low-temperature strategy using (NH4)2SO4 as an additive to effectively extract lithium from LiBC. In details, the thermodynamic analysis verifies that Li, Al, and Fe can be converted to sulfates at 250-450 degrees C during thermal treatment, indicating the possibility for extraction of Li under low-temperature conditions. Subsequently, the leaching behavior of lithium under different roasting temperatures and water leaching conditions was investigated. The results show that 83.43 % of Li can be extracted under optimized conditions. The mechanism study was carried out through a number of characterization techniques including 3D microscope, TG-DSC, XRD, FTIR, and SEM. It reveals that formation of liquidus phase of molten salt is the key to achieve low-temperature roasting and transfer and reactions at the interface of molten salt and LiBC can be significantly enhanced that can easily breakdown the interlayer structures. Consequently, it offers distinct advantages, since the roasting temperature can be significantly decreased with minor impurity ions being leached into the solutions. This research therefore provides an efficient and environmentally friendly method for lithium extraction from minerals.

关键词： Lithium-bearing mineral Molten salt roasting Solid-liquid reaction Lithium Extraction Ammonium sulfate

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Corrosion behavior of Cu-40Zn alloy in a periodic service between simulating atmospheric and deep sea environment

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CORROSION REVIEWS 2025年第1期43卷 127-141页

作者： Hu, Shengbo liu, Zhong Yuan, xuwen Meng, Fandi Liao, Luhai Guo, Rui Yang, Wei Li, Fengguang Hubei Univ Automot Technol Sch Mat Sci & Engn Shiyan 442002 Peoples R China Hubei Key Lab Energy Storage & Power Battery Shiyan 442002 Peoples R China Northeastern Univ Shenyang Natl Lab Mat Sci 3-11 Wenhua Rd Shenyang 110819 Peoples R China

The corrosion behavior of Cu-40Zn alloy in a periodic service between simulating atmospheric and deep sea environment has been systematically studied. Results showed that a layer of protective corrosion products can be formed quickly and become defective over time. During the periodic service, the HP (high hydrostatic pressure) promotes the anodic dissolution of the base and the generation of (Cu, Zn)2(OH)3Cl, which causes expansion of the corrosion products;the AP (alternating pressure) facilitates the wetting process during dry to wet stage, and the alternating force caused by AP leads to the cracks, peeling off of the corrosion products. Severe intergranular corrosion takes place, which initiates at the beta phase and is accelerated by the combination of defective corrosion products and the drying stage.

关键词： Cu-Zn alloy periodic service hydrostatic pressure EIS

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Efficient combination of ionic-liquid-based ultrasound-assisted extraction, complex chromatography, and molecular docking for screening of acetylcholinesterase inhibitors from Ganoderma atrum

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JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2023年第2期17卷 1228-1240页

作者： Hou, Wanchao liu, Chunming Li, Sainan Niu, Huazhou liu, Zhen Zhang, Yuchi Jin, Yongri Li, xuwen Jilin Univ Coll Chem Changchun 130021 Jilin Peoples R China Changchun Normal Univ Cent Lab Changchun 130032 Peoples R China

Compounds extracted from Ganoderma atrum (G. atrum) is significantly beneficial to human health, have been incorporated in numerous remedies owing to their brain and kidney health benefits and antiinflammatory and diuretic properties. G. atrum a pilot of homology of medicine and food, has an important development value of functional food and health food. In this study, to develop a new ionic-liquid-based ultrasound-assisted extraction method and bio-affinity ultrafiltration coupled with LC and MS. Moreover, molecular docking was used to evaluate the activity of the AChE inhibitors, which were subsequently isolated and purified using consecutive counter-current chromatography (CCC) and semi-preparative high-performance liquid chromatography (HPLC). Lastly, the active compounds were identified using MS and nuclear magnetic resonance. Four AChE inhibitors, viz. ergosterol, ergosta-7,22-dien-3-one, ergosta-7-en-3 beta-ol, and ergosta-4,6,8(14),22-tetraen-3-one with purities of 92.23%, 90.19%, 90.52% and 96.72%, respectively, were obtained from G. atrum using consecutive CCC (ethyl acetate/methanol/water, 4.0:1.0:7.0, v/v/v) coupled with semi-preparative HPLC (4% A (0-30 min), 4-100% A (30-40 min)). Our results suggested that G. atrum extracts can be used in the potential prevention and treatment of neurodegenerative diseases. It will help to elucidate the mechanisms of action of various medicinal plants at the molecular level and provide more opportunities to discover and develop new potential therapeutic remedies from health care food resources.

关键词： Ganoderma atrum Ionic-liquid Acetylcholinesterase Inhibitor molecular Docking chromatography

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Study on the influence of methanol on the precursor of soot and particulate matter of diesel engine fueled with F-T diesel

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ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS 2025年第1期47卷 11891-11910页

作者： Li, Ruina liu, Qingcheng Yang, Dahai Zhu, Jialong Li, xuwen Yue, Hua Meng, Yang Jiangsu Univ Sch Automot & Traff Engn 301 Xuefu Rd Zhenjiang 212013 Jiangsu Peoples R China Zhejiang Constant Power Machinery Co Ltd CST Res Inst Shaoxing Zhejiang Peoples R China

Methanol is a high-quality alternative fuel for diesel engines and mainly used for methanol intake injection (MII) and methanol mixing direct injection (MMDI) modes. The methanol injection mode influences the formation of soot precursors and particulate matter (PM). This paper carried out a methanol/F-T diesel engine bench test at 2400 r/min, 100% load with two methanol injection modes. And the effects of methanol injection mode on the soot precursor were investigated by establishing an in-cylinder working process simulation. Research has shown that when the methanol blending ratio is 30%, the smoke emissions of MMDI and MII were reduced by 25.3% and 30.2% compared to F-T diesel. Moreover, the MII mode was more conducive to improving the agglomeration degree of particulate matter. MII mode formed a uniform methanol mixture earlier than MMDI mode at the same crankshaft angle in the cylinder. Benzene (A1) is the first ring of aromatic hydrocarbons and the most important precursor of soot. When the methanol blending ratio was 30%, compared with MMDI, the peak concentration of A1 was reduced by 17.2% and appeared earlier by 14.3% in MII mode. C3H3 was the main intermediate product of aromatic hydrocarbons formation. Compared with the MMDI mode, the peak concentration of C3H3 in the MII mode was reduced by 51.6%, effectively suppressing the generation of benzene.

关键词： Diesel engine F-T diesel methanol methanol injection method PM soot

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LED红光照射对牙龈成纤维细胞抗炎反应的影响

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照明工程学报 2021年第3期32卷 116-123页

作者：刘旭文陈泽庆黄诗捷卢志成刘木清复旦大学光源与照明工程系上海200433 复旦大学先进照明技术教育部工程研究中心上海200433 复旦大学工程与应用技术研究院上海200433

发光二极管(LED)具有高效、光谱纯、安全稳定、环保等优点,已广泛地应用于照明、显示、农业、医疗等领域。牙周病是发生在牙龈、牙周膜等牙周支持组织的慢性炎症类疾病,牙周病患者常需要口服或局部使用抗生素来控制病情,易引发不良反应... 详细信息

发光二极管(LED)具有高效、光谱纯、安全稳定、环保等优点,已广泛地应用于照明、显示、农业、医疗等领域。牙周病是发生在牙龈、牙周膜等牙周支持组织的慢性炎症类疾病,牙周病患者常需要口服或局部使用抗生素来控制病情,易引发不良反应。本文主要研究LED红光照射对牙龈成纤维细胞抗炎反应的影响,分析在18 J/cm2剂量下,不同光强度的630 nm红光照射对已受脂多糖刺激的牙龈成纤维细胞内ROS和PGE2的产生的影响,发现630 nm LED红光照射可以有效抑制体外培养的牙龈成纤维细胞内炎症反应;同时发现强度为5 mW/cm2的红光对炎症的抑制效果最佳。实验结果希望可以为牙周病临床治疗提供参考。

关键词： LED 牙龈成纤维细胞脂多糖炎症 PGE2

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Identification of unhealthy Panax notoginseng from different geographical origins by means of multi-label classification

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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019年 222卷 117243-000页

作者： Yang, Xiaodong Song, Jie Wu, Xin Xie, Lin liu, xuwen Li, Guanglin Southwest Univ Coll Engn & Technol Chongqing 400715 Peoples R China

Root-knot nematode is a common plant-parasitic pest with a highly destructive that infects more than 2000 plant species. Panax notoginseng (P. notoginseng) is one of the most susceptible traditional medicine. More importantly, it is difficult to distinguish the powders of P. notoginseng infected with root-knot nematode from those of healthy P. notoginseng due to the color and shape are same after being ground into powder. In this paper, Attenuated Total Reflection-Fourier Transform Infrared (ATR-FTIR) was used to identify P. notoginseng samples. Multiplicative scatter correction (MSC) was applied to preprocess the spectral data. Competitive adaptive reweighted sampling (CARS) and successive projection algorithm (SPA) were employed to select feature variables. Density-based spatial clustering of application with noise (DBSCAN) was adopted to discover groups within the data. Also, we found that the geographical origin is a pivotal factor to consider when identifying unhealthy P. notoginseng. Therefore, we introduced a novel multi-label classification (MLC) method to identify healthy and unhealthy P. notoginseng powders from three different geographical origins. In addition, binary relevance method (BR), classifier chain (CC), ensembles of classifier chains (ECC), and multilayer perceptron classifier (MLPC) were applied to create classification models, ECC exhibits superior performance in particular. (C) 2019 Elsevier B.V. All rights reserved.

关键词： Panax notoginseng Root-knot nematode Geographical origin Multi-label classification

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