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水相中溶解性有机物的浓度对荧蒽光降解的影响

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辽宁大学学报（自然科学版） 2023年第2期50卷 166-176页

作者：薛爽姜彩虹刘纪阳张朝星于英潭刘强辽宁大学环境学院辽宁沈阳110036

本文以Suwannee River NOM(SRNOM)和Upper Mississippi River NOM(UMRNOM)两种溶解性有机物(DOM)为研究对象,利用500 W高压氙灯作为光源模拟太阳光,进行室内光解实验,考察了DOM的浓度对水相中荧蒽光降解的影响.研究结果表明,光降解是荧... 详细信息

本文以Suwannee River NOM(SRNOM)和Upper Mississippi River NOM(UMRNOM)两种溶解性有机物(DOM)为研究对象,利用500 W高压氙灯作为光源模拟太阳光,进行室内光解实验,考察了DOM的浓度对水相中荧蒽光降解的影响.研究结果表明,光降解是荧蒽的主要降解途径,荧蒽的光降解符合一级动力学方程.这两种DOM均促进了荧蒽的光降解,并且这两种DOM对荧蒽光降解的促进作用均随着溶解有机碳(DOC)浓度的升高而降低.在DOM存在的条件下,荧蒽的表观光降解速率常数(K)值与两种DOM的DOC(a_(280)和a_(350))均具有显著负相关性,而与E_(2)/E_(3)和荧光强度无显著性相关性.

关键词：溶解性有机物(DOM) 荧蒽光降解紫外-可见光谱同步荧光光谱

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Synergistic Effect of Mixed Cosurfactants on Transdermal Delivery of Indomethacin from O/W Microemulsion

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Chemical Research in Chinese Universities 2013年第2期29卷 338-343页

作者： LING ying yu Meng GUO Fang LI Nan tan Feng-ping Tianjin Key Laboratory of Modern Drug Delivery and High-Efficiency School of Pharmaceutical Science and Technology Tianjin University Tianjin 300072 P. R. China

t Since large amounts of oils, surfactants and penetration enhancers used in microemulsion systems might lead to seriously skin irritation, the percutaneous absorption and penetration of indomethacin（IMC, model drug） from O/W microemulsion were enhanced by simply changing the composition of cosurfactants. Pseudo-ternary phase dia- grams were constructed with mixed cosurfactants at different ratios. Hairless rat skin was used as a barrier for per- meation experiments. Four formulations were prepared with fixed oil, surfactant and different cosurfactant con- tent（4%, 20% and 20%, mass fraction）, and formulation F4 with menthol added was evaluated to compare the en- hancement effect of it with those of mixed cosurfactants. The O/W microemulsion region was the largest when the mass ratio of ethanol/transcutol was 1：1. However, the region changed slightly for the system with incorporated mixed cosurfactants propylene glycol/transcutol. The flux and skin retention of IMC from O/W microemulsion with mixed cosurfactants were much higher than that with single cosurfactant（P〈0.01）, while incorporation of menthol would only enhance the drug flux through the skin. To conclude, mixed cosufactants could affect the phase behavior and improve the percutaneous absorption and penetration of IMC. Based on this, it provided a promising solution to enhance drug release from microemulsions without raising potential skin damage.

关键词： O/W microemulsion Mixed cosurfactant Transdermal drug delivery Menthol

Dynamic Regulation of Hydrogen Bonding Networks and Solvation Structures for Synergistic Solar‑Thermal Desalination of Seawater and Catalytic Degradation of Organic Pollutants

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Nano-Micro Letters 2025年第2期17卷 548-565页

作者： Ming‑yuan yu Jing Wu Guang Yin Fan‑Zhen Jiao Zhong‑Zhen yu Jin Qu Beijing Key Laboratory of Advanced Functional Polymer Composites Beijing University of Chemical TechnologyBeijing 100029People’s Republic of China State Key Laboratory of Organic‑Inorganic Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029People’s Republic of China

Although solar steam generation strategy is efficient in desalinating seawater,it is still challenging to achieve continuous solar-thermal desalination of seawater and catalytic degradation of organic ***,dynamic regulations of hydrogen bonding networks and solvation structures are realized by designing an asymmetric bilayer membrane consisting of a bacterial cellulose/carbon nanotube/Co_(2)(OH)_(2)CO_(3)nanorod top layer and a bacterial cellulose/Co_(2)(OH)_(2)CO_(3)nanorod(BCH)bottom ***,the hydrogen bonding networks inside the membrane can be tuned by the rich surface–OH groups of the bacterial cellulose and Co_(2)(OH)_(2)CO_(3)as well as the ions and radicals in situ generated during the catalysis ***,both SO_(4)^(2−)and HSO_(5)−can regulate the solvation structure of Na^(+)and be adsorbed more preferentially on the evaporation surface than Cl^(−),thus hindering the de-solvation of the solvated Na^(+)and subsequent nucleation/growth of ***,the heat generated by the solar-thermal energy conversion can accelerate the reaction kinetics and enhance the catalytic degradation *** work provides a flow-bed water purification system with an asymmetric solar-thermal and catalytic membrane for synergistic solar thermal desalination of seawater/brine and catalytic degradation of organic pollutants.

关键词： Solar steam generation Seawater desalination Catalytic degradation Bacterial cellulose Cobalt hydroxycarbonate nanorods

Boosting bidirectional sulfur conversion enabled by introducing boron-doped atoms and phosphorus vacancies in Ni2P for lithium-sulfur batteries

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Journal of Energy Chemistry 2025年第1期100卷 760-769页

作者： Lin Peng yu Bai Hang Li Meixiu Qu Zhenhua Wang Kening Sun Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing Key Laboratory of Chemical Power Source and Green Catalysis School of Chemistry and Chemical Engineering Beijing Institute of Technology

Lithium-sulfur （Li-S） batteries have gained great attention due to the high theoretical energy density and low cost,yet their further commercialization has been obstructed by the notorious shuttle effect and sluggish redox ***,we supply a strategy to optimize the electron structure of Ni2P by concurrently introducing B-doped atoms and P vacancies in Ni2P （Vp-B-Ni2P）,thereby enhancing the bidirectional sulfur *** study indicates that the simultaneous introduction of B-doped atoms and P vacancies in Ni2P causes the redistribution of electron around Ni atoms,bringing about the upward shift of d-band center of Ni atoms and effective d-p orbital hybridization between Ni atoms and sulfur species,thus strengthening the chemical anchoring for lithium polysulfides （LiPSs） as well as expediting the bidirectional conversion kinetics of sulfur ***,theoretical calculations reveal that the incorporation of B-doped atoms and P vacancies in Ni2P selectively promotes Li2S dissolution and nucleation ***,the Li-S batteries with Vp-B-Ni2P-separators present outstanding rate ability of 777 m A h g-1at 5 C and high areal capacity of 8.03 mA h cm-2under E/S of 5μL mg-1and sulfur loading of 7.20 mg *** work elucidates that introducing heteroatom and vacancy in metal phosphide collaboratively regulates the electron structure to accelerate bidirectional sulfur conversion.

关键词： Lithium sulfur batteries

Induced pluripotent stem cell-related approaches to generate dopaminergic neurons for Parkinson's disease

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Neural Regeneration Research 2025年第11期20卷 3193-3206页

作者： Ling-Xiao Yi Hui Ren Woon Genevieve Saw Li Zeng Eng King tan Zhi Dong Zhou National Neuroscience Institute Singapore Nanyang Technology University Singapore Department of Neurology Singapore General HospitalSingapore Signature Research Program in Neuroscience and Behavioral Disorders Duke-NUS Medical SchoolSingapore

The progressive loss of dopaminergic neurons in affected patient brains is one of the pathological features of Parkinson's disease,the second most common human neurodegenerative *** the detailed pathogenesis accounting for dopaminergic neuron degeneration in Parkinson's disease is still unclear,the advancement of stem cell approaches has shown promise for Parkinson's disease research and *** induced pluripotent stem cells have been commonly used to generate dopaminergic neurons,which has provided valuable insights to improve our understanding of Parkinson's disease pathogenesis and contributed to anti-Parkinson's disease *** current review discusses the practical approaches and potential applications of induced pluripotent stem cell techniques for generating and differentiating dopaminergic neurons from induced pluripotent stem *** benefits of induced pluripotent stem cell-based research are *** dopaminergic neuron differentiation protocols from induced pluripotent stem cells are *** emerging three-dimension-based brain organoid models compared with conventional two-dimensional cell culture are ***,limitations,challenges,and future directions of induced pluripotent stem cell–based approaches are analyzed and proposed,which will be significant to the future application of induced pluripotent stem cell-related techniques for Parkinson's disease.

关键词： dopaminergic neurons induced pluripotent stem cells Parkinson's disease stem cell approaches

Preparation,with graphene,of novel biomimetic selfhealing microcapsules with high thermal stability and conductivity

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Frontiers of Structural and Civil Engineering 2023年第8期17卷 1188-1198页

作者： ying-yuan WANG Yi-Qiu tan School of Transportation Science and Engineering Harbin Institute of TechnologyHarbin 150090China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of TechnologyHarbin 150090China

This paper reports a comparative study of microcapsules with enhanced thermal stability and electrical conductivity inspired by the bionic thermal insulation of birds’feathers for self-healing aged *** work is based on an in situ polymerization with composite shell components of graphene and hexamethoxymethylmelamine *** using graphene,microcapsules with rough surfaces are achieved,improving the interface between microcapsules and *** addition,the microcapsules’initial thermal decomposition temperature is appropriately high,so that the stability of the microcapsule in the asphalt highway system is *** proportion of graphene in the microcapsule shell can regulate the microcapsule’s heat resistance because graphene modifies the shell’s structural ***,the microcapsules’electrical conductivity is relatively *** self-healing capability of bitumen sharply increases,providing benefit to the effect of microcapsules on the properties of aged asphalt.

关键词： graphene microcapsule bitumen heat insulation conductivity

Lumbar infection caused by Mycobacterium paragordonae:A case report

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World Journal of Clinical Cases 2021年第29期9卷 8879-8887页

作者： ying-Zheng tan Ting yuan Liang tan yu-Qiu Tian yun-Zhu Long Department of Infectious Diseases Zhuzhou Central HospitalZhuzhou 412000Hunan ProvinceChina Department of Spinal Surgery Zhuzhou Central HospitalZhuzhou 412000Hunan ProvinceChina

Mycobacterium paragordonae(***),a slow-growing,acid-resistant mycobacterial species,was first isolated from the sputum of a lung infection patient in South Korea in *** caused by *** are *** SUMMARY Herein,we report the case of a 53-year-old patient who presented with fever and low back *** nuclear magnetic resonance imaging revealed the destruction of the lumbar vertebra with peripheral abscess *** antiinfective and diagnostic anti-tuberculosis treatment,the patient had no further fever,but the back pain was not ***,the necrotic material was sent for pathological examination,and all tests related to tuberculosis were negative,but pus culture suggested nontuberculous *** necrotic tissue specimens were subjected to metagenomic next-generation sequencing,which indicated the presence of ***,the infecting pathogen was identified,and the treatment plan was *** patient was in good condition during the follow-up *** ***,a rare nontuberculous mycobacterium,can also cause spinal *** the clinic,it is necessary to identify nontuberculous mycobacteria for spinal infections similar to Mycobacterium tuberculosis.

关键词： Mycobacterium paragordonae Nontuberculous mycobacteria Spinal infection Lumbar spine infection Metagenomic next-generation sequencing Mycobacterium tuberculosis Case report

Effect of cholesterol metabolism on hepatolithiasis

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World Journal of Gastroenterology 2025年第1期31卷 157-162页

作者： Lin Zheng Zi-yu Ye Jun-Ji Ma Department of Gastroenterology The Second Hospital of Hebei Medical UniversityHebei Key Laboratory of GastroenterologyHebei Institute of GastroenterologyHebei Clinical Research Center for Digestive DiseasesNo.215 Heping West RoadShijiazhuang 050000Hebei ProvinceChina

Surgical intervention is currently the primary treatment for hepatolithiasis;how-ever,some patients still experience residual stones and high recurrence rates after *** metabolism seems to play an important role in hepatoli-thiasis pathogenesis.A high cholesterol diet is one of the significant reasons for the increasing incidence of ***,regular diet and appropriate medical intervention are crucial measures to prevent hepatolithiasis and reduce recurrence rate after *** dietary cholesterol and drugs that increase cholesterol stone solubility are key therapeutic approaches in treating *** article discusses the cholesterol metabolic pathways related to the pathogenesis of hepatolithiasis,as well as food intake and targeted therapeutic drugs.

关键词： Hepatolithiasis Cholesterol metabolism High-fat diet 3-hydroxy-3-methylglutaryl-coenzyme A reductase Interlobular bile duct

A Novel Extremum Seeking Control to Enhance Convergence and Robustness in the Presence of Nonlinear Dynamic Sensors

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Journal of Systems Science & Complexity 2024年第1期37卷 3-21页

作者： LIU Hengchang tan ying OETOMO Denny School of Electrical Mechanical and Infrastructure EngineeringThe University of MelbourneParkville VIC 3010Australia

This paper focuses on optimizing an unknown cost function through extremum seeking(ES)control in the presence of a slow nonlinear dynamic sensor responsible for measuring the *** contrast to traditional perturbation-based ES control,which often suffers from sluggish convergence,the proposed method eliminates the time-scale separation between sensor dynamics and ES control by using the relative degree of the nonlinear sensor *** improve the convergence rate,the authors incorporate high-frequency dither signals and a *** enhance the robustness with the existence of rapid disturbances,an off-the-shelf linear high-gain differentiator is *** first result demonstrates that,for any desired convergence rate,with properly tuned parameters for the proposed ES algorithm,the input of the cost function can converge to an arbitrarily small neighborhood of the optimal solution,starting from any initial condition within any given compact ***,the second result shows the robustness of the proposed ES control in the presence of sufficiently fast,zero-mean periodic *** results substantiate these theoretical findings.

关键词： Averaging extremum seeking optimization singular perturbation time-scale separation