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Light-responsive Self-Immolative L-glutamic Acid-based Polyester Nanoparticles for Controlled Drug Release via Passerini Three-Component Polymerization

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Chinese Journal of Polymer Science 2024年第5期42卷 570-578,I0005页

作者： Xiao-Fei Sun Xu Zhang Shu-Ping Song Ya-Qun Yao Yan Zhang Cheng-Liang Wang Jing-Jiang Sun Qing-Fu Wang key laboratory of Rubber-plastics Ministry of EducationSchool of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao266042China Qingdao Research Academy of Environmental Science Qingdao266012China

L-glutamic acid(LA)is a bio-based,non-toxic,environmentally friendly material derived from *** present study reports the application of Passerini three-component polymerization(P-3CP)for the straightforward preparation of LA-based light-responsive polyesters(PLTDs)under mild *** with molar masses up to 8500 g/mol and high yields exceeding 90%are *** chemical structures and light-responsive self-immolative behavior of PLTDs are comprehensively characterized by employing ultraviolet-visible(UV-Vis)spectroscopy,size exclusion chromatography(SEC),nuclear magnetic resonance(NMR)spectroscopy,and liquid chromatography mass spectrometry(LC-MS).Meanwhile,monodisperse PLTD-based doxorubicin-loaded nanoparticles(PLTD-DOX-NP)(size=193 nm,PDI=0.018)are formulated by nanoprecipitation *** light-induced depolymerization,the PLTD-DOX-NP undergoes rapid decomposition,resulting in a burst release of 80%cargo within 13 ***,according to biological toxicity tests,the PLTD-NP possesses adequate biosafety,both before and after ***,the incorporation of P-3CP with biorenewable LA-based monomer adheres to the principles of green chemistry,significantly simplifying the synthetic pathway of light-responsive polymers.

关键词： L-glutamic acid Passerini three-component polymerization Light-responsive Polyester Nanoparticles

Research Progress of Deep Eutectic Solvents in Extraction of Plant Flavonoids

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Agricultural Biotechnology 2024年第3期13卷 34-40,44页

作者： Zhen LIN Shengmei XU Shaomei CHEN Cui WANG Jian CHEN Fujian Vocational College of Bio-engineering Fuzhou 350002China Customs"Belt and Road"Information Sharing Application Innovation laboratory Fujian Provincial Key Laboratory of Inspection and Quarantine Technology Research CenterFuzhou Customs Technology CenterFuzhou 350003China

As a new type of green solvents,deep eutectic solvents(DESs)have the advantages of strong extraction ability,designability,simple preparation,low price,recoverability and biodegradation,and show great application potential in the field of plant flavonoid *** this paper,the definition,classification and preparation methods of DESs were *** effects of DES composition,molar ratio of DES components,water content of DES systems,liquid-material ratio,extraction temperature,extraction time and extraction auxiliary techniques on the extraction yield of plant flavonoids were *** recycling methods of DESs were *** problems of DESs in the field of plant flavonoids extraction were pointed out,and further research direction and trend were analyzed and prospected.

关键词： Deep eutectic solvent Plant flavonoid Extraction Assistive technique Regeneration

Microstructure, thermal properties, and corrosion behaviors of FeSiBAlNi alloy fabricated by mechanical alloying and spark plasma sintering

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International Journal of Minerals,Metallurgy and Materials 2016年第1期23卷 77-82页

作者： Hong-lei Wang Tai-xiu Gao Jia-zheng Niu Pei-jian Shi Jing Xu Yan Wang School of Materials Science and Engineering University of Jinan Shandong provincial key laboratory of preparation and Measurement of Building Materials University of Jinan

An equiatomic FeSiBAlNi amorphous high-entropy alloy （HEA） was fabricated by mechanical alloying （MA）. A fully amorphous phase was obtained in the FeSiBAlNi HEA after 240 h of MA. The bulk FeSiBAlNi samples were sintered by spark plasma sintering （SPS） at 520 and 1080℃ under a pressure of 80 MPa. The sample sintered at 520℃ exhibited an amorphous composite structure comprising solid-solution phases （body-centered cubic （bcc） and face-centered cubic （fee） phases）. When the as-milled amorphous HEA was consoli- dated at 1080℃, another fcc phase appeared and the amorphous phase disappeared. The sample sintered by SPS at 1080℃ exhibited a slightly higher melting temperature compared with those of the as-milled alloy and the bulk sample sintered at 520℃. The corrosion behav- iors of the as-sintered samples were investigated by potentiodynamic polarization measurements and immersion tests in seawater solution. The results showed that the HEA obtained by SPS at 1080℃ exhibited better corrosion resistance than that obtained by SPS at 520℃.

关键词： high entropy alloys spark plasma sintering mechanical alloying microstructure corrosion resistance

Influence of cooling rate and addition of lanthanum and cerium on formation of nanoporous copper by chemical dealloying of Cu_(15)Al_(85) alloy

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Journal of Rare Earths 2013年第11期31卷 1119-1124页

作者：姜华伟李捷耿浩然王庆磊 School of Materials Science and Engineering University of Jinan Shandong provincial key laboratory of preparation and Measurement of Building Materials University of Jinan

The influence of cooling rate and addition of La and Ce on the formation of nanoporous copper by chemical dealloying of Cu15Al85 alloy was studied. The components and microstructures of nanoporous copper were characterized by utilizing X-ray diffrac-tion, field emission scanning electron microscopy and energy dispersive X-ray analysis. N2 adsorption/desorption experiments were used to evaluate specific surface areas of samples. The results showed that, with the increase of cooling rate, phase composition of precursor alloy almost had no change, the ligament size of nanoporous copper had a decrease trend, and specific surface area in-creased gradually. And it was found that the specific surface area of the nanoporous copper obtained by Cu15Al85 alloy containing La and Ce was 63.258 m2/g, which was more than 11.739 m2/g compared with the nanoporous copper dealloying by Cu15Al85 alloy without La and Ce under the same conditions.

关键词： cooling rate La Ce nanoporous copper specific surface area rare earths

Effect of Natural Zeolite on Performance of Sulfoaluminate Cement-based Planting Cementitious Material

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Journal of Wuhan University of Technology(Materials Science) 2017年第3期32卷 586-590页

作者：李来波宫晨琛 WANG Shoude LU Lingchao CHENG Xin Shandong provincial key laboratory of preparation and Measurement of Building Materials University of Jinan Jinan 250022 China

This paper aimed to improve the water-retention performance and basic physical properties of sulfoaluminate cement（SAC）-based planting cementitious material. The effect of natural zeolite on the performance of SAC-based planting material was investigated. The water-retention performance, porosity, compressive strength, and alkalinity had been tested and TG-DSC analysis had been adopted in this paper. Experimental results showed that zeolite was effective to improve the water-retention capacity and 10%, 20% and 30% natural zeolite increased the pore volume of the hardened pastes by 10.6%, 26.0%, and 38.6%, especially pore size below 0.1 μm was increased by 9.7%, 26.2% and 17.5%. And 10% zeolite was beneficial to the compressive strengths of cementitious material and 1, 3, and 28 d compressive strength reached up to 35.9, 55.0, 80.3 MPa. Furthermore zeolite decreased the alkalinity of pore fluid of hardened cementitious material, while the addition of zeolite reached up to 30%, the alkalinity of pore fluid of hardened cementitious material decreased by 8.9%. Therefore zeolite was suitable for improving the performance of SAC-based planting cementitious material.

关键词： zeolite sulfoaluminate cement water-retention performance planting cementitious material

Glass-forming ability, microhardness, corrosion resistance, and dealloying treatment of ***40Ndx alloy ribbons

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International Journal of Minerals,Metallurgy and Materials 2017年第6期24卷 708-717页

作者： Hao-yi Chi Zhen-gui Yuan Yan Wang Min Zuo De-gang Zhao Hao-ran Geng Shandong provincial key laboratory of preparation and Measurement of Building Materials School of Materials Science and Engineering University of Jinan Jinan 250022 China

The influence of Nd addition on the glass-forming ability (GFA), microhardness, and corrosion resistance of Mg60−xCu40Ndx(x = 5, 10, 15, 20, and 25, at%) alloys were investigated by differential scanning calorimetry, Vickers-type hardness tests, and electrochemical methods. The results suggest that the GFA and microhardness of the amorphous alloys increase until the Nd content reaches 20at%. The corrosion potential and corrosion current density obtained from the Tafel curves indicate that the Mg35Cu40Nd25ternary alloy exhibits the best corrosion resistance among the investigated alloys. Notably, nanoporous copper (NPC) was synthesized through a single-step dealloying of Mg60−xCu40Ndx(x = 5, 10, 15, 20, and 25) ternary alloys in 0.04 mol·L−1H2SO4solution under free corrosion conditions. The influence of dealloying process parameters, such as dealloying time and temperature, on the microstructure of the ribbons was also studied using the surface diffusivity theory. The formation mechanism of dealloyed samples with a multilayered structure was also discussed. © 2017, University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg.

关键词： Corrosion Corrosion resistance Differential scanning calorimetry Glass Microhardness Neodymium alloys Ternary alloys

Hydrophobic modification of polysaccharides and the construction and properties of their micelles:a review of applications in the field of biomedicine

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Science China Chemistry 2024年第6期67卷 1881-1903页

作者： Dayang Wang Xiaohua Li Huanchen Yao Xin Liu Yan Gao Hailin Cong Bing Yu Youqing Shen College of Chemistry and Chemical Engineering College of Life SciencesCollege of Materials Science and EngineeringInstitute of Biomedical Materials and EngineeringQingdao UniversityQingdao266071China State key laboratory of Bio-Fibers and Eco-Textiles Qingdao UniversityQingdao266071China School of Materials Science and Engineering Shandong University of TechnologyZibo255000China key laboratory of Biomass Chemical Engineering of Ministry of Education Center for Bionanoengineeringand Department of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China

Nanomedicine delivery technology plays an important role in modern medicine and has shown good therapeutic effects in scientific *** have the characteristics of wide sources,excellent biocompatibility,and *** addition,there are multifunctional groups on the main chain of polysaccharides,which can be surface-modified or functionalized to have targeting ability through specific sugar *** polysaccharide micelles with good biocompatibility,degradability,high safety,easy structural modification,and special core-shell structure are regarded as ideal carriers for ***,this review is focused on the hydrophobic modification designs of polysaccharides,the preparation methods and characteristics of micelles,and the applications of amphiphilic polysaccharide micelles in the field of *** is expected to provide some ideas and inspiration for the design of polysaccharide drug carriers.

关键词： polysaccharide hydrophobic modification micelle drug delivery biomedicine

Ploidy and fruit trait variation in oil-tea Camellia:Implications for ploidy breeding

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Journal of Integrative Agriculture 2024年第8期23卷 2662-2673页

作者： Yanmin Li Liangjing Yin Xianyu He Cenlong Hu Ronghua Wu Qian Long Shixin Xiao Deyi Yuan key laboratory of Cultivation and Protection for Non-Wood Forest Trees of Ministry of Education/key laboratory of Non-Wood Forest Products of State Forestry Administration Central South University of Forestry and TechnologyChangsha 410004China Qiandongnan Institute of Forestry Qiandongnan Miao and Dong Autonomous Prefecture 556000China Dongfeng Forest Farm of Liping County Qiandongnan Miao and Dong Autonomous Prefecture 557300China

Plant polyploidy often occurs in conjunction with higher yield and superior ***,obtaining polyploid germplasms is a significant part of *** oil-tea Camellia tree is an important native woody plant that produces high-quality edible oil and includes many species of Camellia with different ***,whether higher ploidy levels in oil-tea Camellia trees are related to better traits remains *** this study,the ploidy levels of 30 different oil-tea Camellia strains in three different species in the *** were determined by flow cytometry and chromosome preparation,and the phenotypic characteristics and fatty acid compositions of the fruits were examined by field observations and laboratory *** correlations between the ploidy level of oil-tea Camellia and the main traits of the fruit were *** results showed that 10 Camellia lanceoleosa strains were diploid,10 Camellia meiocarpa strains were tetraploid and 10 Camellia oleifera strains were *** *** had larger fruit size and weight,more seeds per fruit,greater seed weight per fruit,higher oil content and greater yield per crown width than tetraploid *** and diploid ***,but their fruit peel thickness and fresh seed rate were significantly lower,and these traits were significantly correlated with ploidy *** addition,in terms of fatty acid composition,hexaploid *** had a higher oleic acid content than tetraploid *** and diploid ***,but their linoleic acid,linolenic acid and arachidonic acid contents were *** contents of palmitic acid,stearic acid and total unsaturated fatty acids were not significantly correlated with ploidy *** conclusion,certain correlations exist between the main characteristics of oil-tea Camellia fruit and the ploidy level,and increasing the ploidy level led to an increase in fruit yield with no effect on oil *** discovery of variations in the m

关键词： oil-tea Camellia ploidy level fruit traits correlation polyploidization

Sensitive detection of dopamine and quinone drugs based on the quenching of the fluorescence of carbon dots

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Science Bulletin 2016年第20期61卷 1615-1623页

作者： Xiangling Ren Jiejie Ge Xianwei Meng Xiaozhong Qiu Jun Ren Fangqiong Tang laboratory of Controllable preparation and Application of Nanomaterials Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190China Department of Anatomy Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering Southern Medical University Guangzhou 510515 China

In this work,we demonstrated that the quinone structure can quench the fluorescence of the carbon dots(CDs).The sensitive determination of dopamine(DA) was studied primarily based on this *** would be transformed into DA quinone under alkaline conditions,which resulted in fluorescence quenching of the CDs.A good linear range from 5 nmol/L to 0.4 mmol/L was obtained and the detection limit was 1 nmol/***,the quenching effect of quinone structure on the fluorescence of CDs was confirmed by Fourier transform infrared spectra,time-correlated single-photon counting and X-ray photoelectron ***,CDs were firstly applied to detect the quinone drugs quantitatively which contained typical quinone structure based on the quenching *** than this,the sensing platform was demonstrated to provide credible selectivity and satisfactory stability in human serum solution with good liner ***,our practical application and mechanism have showed great potential for diagnostic purposes.

关键词： Carbon dots Quinone structure Detection Dopamine Quinone drugs