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Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： Yi Qi Xueying Chen Bowen Liu Xuliang lin Xueqing Qiu Yanlin Qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

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Identification of a dual functional betulinic acid analog for the treatment of osteoarthritis by phenotypic screening

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Science China Life Sciences 2025年第1期 300-302页

作者： Ze-Min lin Mai Xiang wen-Hui Wei Shu-Hui Fan Li Chen Jie Wang Xiao-Qian yang Chun-Hao yang Shi-Jun He Jian-Ping Zuo Laboratory of Immunopharmacology State Key Laboratory of Drug ResearchShanghai Institute of Materia MedicaChinese Academy of Sciences School of Pharmacy University of Chinese Academy of Sciences School of Pharmacy Nanjing University of Chinese Medicine State Key Laboratory of Drug Research Department of Medicinal ChemistryShanghai Institute of Materia MedicaChinese Academy of Sciences Innovation Research Institute of Traditional Chinese Medicine Shanghai University of Traditional Chinese Medicine Experiment Center for Science and Technology Shanghai University of Traditional Chinese Medicine

Dear Editor, Phenotypic drug discovery, which observes compound effects on physiology,has given way to targeting specific molecules, but has revived by using modern methods to find drugs based on therapeutic outcomes in disease models(Vincent et al., 2022). Osteoarthritis(OA) is a prevalent chronic joint disorder, primarily affecting knee joints, with osteoclast activation due to low-grade inflammation resulting in increased bone resorption and structural changes in the joint(Katz et al.,2021).

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Programming molecular switches in water and ethanol via thermo-sensitive polymers for phase control in energetic crystals

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Defence Technology（防务技术） 2024年第8期38卷 75-88页

作者： Xinru yang Yushi wen Congmei lin Feiyan Gong Zhijian yang Fude Nie Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621900China

The practical application of energetic materials, particularly 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane(CL-20), is frequently impeded by phase transition challenges. In this study, we propose a novel strategy to enhance the stability of CL-20 by employing a thermo-sensitive polymer,poly(N-isopropylacrylamide)(PNIPAM), to modulate its phase transitions. Our approach involves the use of an in-situ polymerized polydopamine(PDA) shell as a platform for surface grafting through atom transfer radical polymerization, yielding a core-shell structured CL-20@PDA-PNIPAM. Through comprehensive characterization, the successful grafting of PNIPAM is confirmed, significantly enhanced the phase stability of CL-20. Notably, our core-shell structure exhibits a 13℃ increase in phase transition temperature compared to raw CL-20, thereby delaying the ε→a phase transition by over 80 min under combined thermal and solvent conditions. The enhanced stability is attributed to the hydrophobic nature of PNIPAM above its low critical solution temperature in water, which effectively shields the CL-20 crystal. These findings provide new insights into enhancing the stability and safety of energetic materials in complex environments, highlighting the potential of our molecular switch mechanism.

关键词： 2,4,6,8,10,12-Hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane(CL-20) Phase stability Polydopamine(PDA) Poly-N-Isopropylacrylamide(PNIPAM) Thermal and solvent effects

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Microstructural evolution during the progressive transformation-induced plasticity effect in a Fe-0.1C-5Mnmedium manganese steel

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 369-379页

作者： Mei Zhang wenhao Li yangfei Chen yang Jiang Xiaofei Guo Han Dong School of Materials Science and Engineering Shanghai UniversityShanghai 200444China State Key Laboratory of Advanced Special Steel Shanghai UniversityShanghai 200444China

The microstructural evolution of a cold-rolled and intercritical annealed medium-Mn steel(Fe-0.10C-5Mn)was investigated during uniaxial tensile ***-situ observations under scanning electron microscopy,transmission electron microscopy,and X-ray diffraction analysis were conducted to characterize the progressive transformation-induced plasticity process and associated fracture initiation *** findings were discussed with the local strain measurements via digital image *** results indicated that Lüders band formation in the steel was limited to 1.5%strain,which was mainly due to the early-stage martensitic phase transformation of a very small amount of the less stable large-sized retained austenite(RA),which led to localized stress concentrations and strain hardening and further retardation of *** small-sized RA exhibited high stability and progressively transformed into martensite and contributed to a stably extended Portevin-Le Chatelier *** volume fraction of RA gradually decreased from 26.8%to 8.2%prior to *** the late deformation stage,fracture initiation primarily occurred at the austenite/martensite and ferrite/martensite interfaces and the ferrite phase.

关键词： medium-Mn steel retained austenite progressive transformation-induced plasticity effect local strain fracture initiation

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PREPARATION OF POLYMER MICROSPHERES WITH PYRIDYL GROUP AND THEIR STABILIZED GOLD METALLIC COLLOIDS

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Chinese Journal of Polymer Science 2007年第6期25卷 555-563页

作者： Shu-ning Li Xin-lin yang wen-qiang Huang Key Laboratory of Functional Polymer Materials the Ministry of Education Institute of Polymer Chemistry Nankai University Tianjin 300071 China

Narrow disperse poly（ethyleneglycol dimethacrylate-co-4-vinylpyridine）（poly（EGDMA-co-4-VPy）） microspheres were prepared by distillation-precipitation copolymerization of ethyleneglycol dimethacrylate （EGDMA） and 4-vinylpyridine （4-VPy） with 2,2＇-azobisisobutyronitrile （AIBN） as initiator in neat acetonitrile. The polymer microspheres containing pyridyl group were then utilized as stabilizer for gold metallic colloids with the diameter around 7 nm, which were prepared by the in situ reduction of gold chloride trihydrate with sodium borohydride through the coordination of the pyridyl group on the gel layer and surface of the microsphere with the gold metallic nano-particles. The catalytic properties of the pyridyl- functionalized microsphere-stabilized gold metallic colloids and the behavior of the stabilized-catalyst for the recycling were investigated with reduction of 4-nitrophenol to 4-aminophenol as a model reaction.

关键词： Polymer microsphere Distillation-precipitation polymerization Pyridyl group Gold metallic colloids Catalysis.

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Ammonia pyrolysis oxidation excited by nanosecond pulsed discharge:Global/fluid models hybrid solution

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Journal of Energy Chemistry 2025年第1期100卷 385-396页

作者： Mingming Zhang Hanyu Wu Qi Chen Jiaxin yang Bonan Liu School of Mechanical Electronic and Control Engineering Beijing Jiaotong University China University of Petroleum

The kinetic characteristics of plasma-assisted oxidative pyrolysis of ammonia are studied by using the global/fluid models hybrid solution ***,the stable products of plasma-assisted oxidative pyrolysis of ammonia are *** results show that the consumption of NH3/O2and the production of N2/H2change linearly with the increase of voltage,which indicates the decoupling of nonequilibrium molecular excitation and oxidative pyrolysis of ammonia at low ***,the detailed reaction kinetics mechanism of ammonia oxidative pyrolysis stimulated by a nanosecond pulse voltage at low pressure and room temperature is *** on the reaction path analysis,the simplified mechanism is *** detailed and simplified mechanism simulation results are compared with experimental data to verify the accuracy of the simplified ***,based on the simplified mechanism,the fluid model of ammonia oxidative pyrolysis stimulated by the nanosecond pulse plasma is established to study the pre-sheath/sheath behavior and the resultant consumption and formation of key *** results show that the generation,development,and propagation of the pre-sheath have a great influence on the formation and consumption of *** consumption of NH3by the cathode pre-sheath is greater than that by the anode pre-sheath,but the opposite is true for OH and O（1S）.However,within the sheath,almost all reactions do not ***,by changing the parameters of nanosecond pulse power supply voltage,it is found that the electron number density,electron current density,and applied peak voltages are not the direct reasons for the structural changes of the sheath and ***,the discharge interval has little effect on the sheath structure and gas mixture *** research results of this paper not only help to understand the kinetic promotion of non-equilibrium excitation in the process of oxidative pyrolysis but also help to explore th

关键词： Nanosecond pulsed discharge Ammonia Oxidative pyrolysis Fluid model Global model

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Mechanism of PEDF promoting the proliferation of lens epithelial cells in human eyes

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Asian Pacific Journal of Tropical Medicine 2015年第11期8卷 946-950页

作者： wen-Lei yang lin Zhang Department of Ophthalmology Renji HospitalSchool of MedicineShanghai Jiao Tong University

Objective:To investigate the regulation effect of pigment epithelium-derived factor(PEDF) on the growth of human lens endothelial cells(LECs) and related mechanisms in mm and in ***:In the part of in vivo study,82 eyes of 82 patients with age-related cataract were included to collect the central lens anterior capsule(diameter at 5.0 to 5.5 mm) with the informed consent of surgery for *** selected specimens were divided into the LECs low density group and high density group with 20 specimens for each group based on hematoxylin and eosin staining *** relative expression level of PEDF mRNA in LECs was detected by reverse transcription *** the part of in vitro study,LEC line(HLEB3) was cultured and 50 ng/mL PEDF was added in media for 72 h in PEDF culture group,while normally cultured cells were used as the control *** percentage of LECs at G_0and S phases and apoptotic rate of cells were assayed by using flow cytometry with annexin V-FTTC/7-AAD double staining *** expression of vascular endothelial growth factor(VEGF) mRNA was detected by real-time fluorescence quantitative ***:The central anterior subcapsular LECs density and relative expression level of PEDF mRNA were lower than those of high density *** were no significant differences between two groups(P=0.168).The apoptotic rate in the PEDF culture group was significantly reduced in comparison with the control group(P<0.001).In addition,the expression level of VEGF mRNA was lower in the PEDF culture group compared with the control group(P<0.001).Conclusions:In human eyes,PEDF may function as cytotropic factor to promote survival of LECs through anti-apoptosis and reducing-expression of *** of PEDF content in LECs probably modulates the pathophysiological process of lens cells and further cataractogenesis.

关键词： Human Lens Epithelial cells Eye protein Vascular e

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Pyroptosis,ferroptosis,and autophagy in spinal cord injury:regulatory mechanisms and therapeutic targets

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Neural Regeneration Research 2025年第10期20卷 2787-2806页

作者： Qingcong Zheng Du Wang Rongjie lin Weihong Xu Department of Spinal Surgery the First Affiliated Hospital of Fujian Medical UniversityFuzhouFujian ProvinceChina Arthritis Clinical and Research Center Peking University People’s HospitalBeijingChina Department of Orthopedic Surgery Fujian Medical University Union HospitalFuzhouFujian ProvinceChina

Regulated cell death is a form of cell death that is actively controlled by *** studies have shown that regulated cell death plays a key role after spinal cord *** and ferroptosis are newly discovered types of regulated cell deaths that have been shown to exacerbate inflammation and lead to cell death in damaged spinal ***,a complex form of cell death that is interconnected with various regulated cell death mechanisms,has garnered significant attention in the study of spinal cord *** injury triggers not only cell death but also cellular survival *** signaling pathways play pivotal roles in influencing the processes of both deterioration and repair in spinal cord injury by regulating pyroptosis,ferroptosis,and ***,this review aims to comprehensively examine the mechanisms underlying regulated cell deaths,the signaling pathways that modulate these mechanisms,and the potential therapeutic targets for spinal cord *** analysis suggests that targeting the common regulatory signaling pathways of different regulated cell deaths could be a promising strategy to promote cell survival and enhance the repair of spinal cord ***,a holistic approach that incorporates multiple regulated cell deaths and their regulatory pathways presents a promising multi-target therapeutic strategy for the management of spinal cord injury.

关键词： autophagy cell death ferroptosis inflammation pathological mechanisms pyroptosis regulated cell death regulatory pathways spinal cord injury therapeutic targets

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人重组生长激素对豚鼠离体心脏血流动力学及心肌细胞动作电位影响

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中国新药与临床杂志 2002年第5期21卷 274-276页

作者：孟繁波杨平武毅张文杰周宏孙雯赵林阳周方君张木兰白求恩医科大学中日联谊医院第三临床学院吉林长春130021 吉林大学校医院吉林长春130021 白求恩医科大学生理教研室吉林长春130021 白求恩医科大学生化教研室吉林长春130021 天津医科大学总医院天津300052

目的 :观察人重组生长激素对正常豚鼠强心作用和对心室肌细胞动作电位的影响。方法 :采用langendorff离体心脏灌流法 ,悬浮玻璃电极法。结果 :注入人重组生长激素 10min后 ,左室最大收缩压 ,左室舒张末压 ,左室内压的最大升降速率的差... 详细信息

目的 :观察人重组生长激素对正常豚鼠强心作用和对心室肌细胞动作电位的影响。方法 :采用langendorff离体心脏灌流法 ,悬浮玻璃电极法。结果 :注入人重组生长激素 10min后 ,左室最大收缩压 ,左室舒张末压 ,左室内压的最大升降速率的差值分别为 (6 .7± 5 .5 )kPa ,(0 .5 0± 0 .10 )kPa ,(139± 93)ps·s- 1,明显升高 ,心率差值为 (10± 16 )次·min- 1减慢 ,动作电位振幅值 (APA) ,超射 (OS) ,复极 5 0 %及 90 %水平的动作电位时程 (APD50 ,APD90 )分别为 (13.2± 6 )mv ,(9.6± 2 .2 )mv ,(84±2 9)ms,(90± 2 2 )ms ,显著延长 (均P <0 .0 1)。结论 :人重组生长激素对正常豚鼠具有正性肌力作用。

关键词：人重组生长激素豚鼠离体心脏血液动力学心肌细胞动作电位

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针刺联合亚低温对脑缺血再灌注损伤大鼠脑组织相关miRNA功能表达的影响

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中国中西医结合杂志 2018年第5期38卷 574-578页

作者：陈楚淘陈文林亚平杨茜芸刘琴肖姮田浩梅湖南中医药管理局脏腑与经穴相关重点研究室湖南中医药大学针灸推拿学院长沙410208

目的观察针刺联合亚低温疗法对脑缺血再灌注损伤大鼠脑组织miRNA功能表达的影响。方法将60只SD大鼠随机分为空白组、假手术组、模型组、针刺组、亚低温组、针刺联合亚低温组(联合组),每组10只。采用Zea Longa线拴法复制改良大脑中动脉... 详细信息

目的观察针刺联合亚低温疗法对脑缺血再灌注损伤大鼠脑组织miRNA功能表达的影响。方法将60只SD大鼠随机分为空白组、假手术组、模型组、针刺组、亚低温组、针刺联合亚低温组(联合组),每组10只。采用Zea Longa线拴法复制改良大脑中动脉缺血模型,造模成功后3h进行干预。假手术组、模型组只捆绑;针刺组针刺人中、百会、大椎穴,每次留针30min,12h/次,共治疗7次;亚低温组置于冰盒内,肛温(33±1)℃、鼓膜温度(31±1)℃保持72h;联合组接受针刺及亚低温治疗72h。治疗前后进行大鼠神经功能缺损评分,测量治疗后大脑梗死面积比,采用基因微阵列技术筛选差异表达miRNA。结果与空白组及假手术组比较,模型组大鼠神经功能缺损评分及脑梗死面积比增加(P0.05)。与模型组比较,空白组、假手术组、针刺组、亚低温组和联合组差异miRNA表达数量分别为4、5、16、7、23个,且差异表达miRNA功能不同。结论针刺联合亚低温疗法可改善缺血再灌注损伤大鼠神经功能缺损,减少脑梗死面积,作用机制可能与调节miRNAs表达有关。

关键词：针刺亚低温脑缺血再灌注损伤 miRNA

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