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Light and temperature dual responsive pesticide release system based on mesoporous silica nanoparticles modified by dopamine

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Journal of Central South University 2022年第2期29卷 397-409页

作者： xuwen-shuang YANG Zhou-xiao-shuang ZHANG Guang-yang LIU Hui Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China Yongzhou Vocational Technical College Yongzhou 425100China

A light and temperature dual responsive copolymer,poly(7-(4-vinylbenzy-loxyl)-4-methylcoumarin-co-N vinyl caprolactam-co-tri(ethylene glycol)methyl ether methacrylate)(PVNM),was grafted on the surface of dopamine based mesoporous silica nanoparticles(MSNs).The resulting polymer brush,MSNs-g-PVNM,was characterized by FT-IR,TEM,TGA and *** dual responsive behaviors of MSNs-g-PVNM were systematically *** imidacloprid as the model guest pesticide,the loading percentage and loading efficiency of the polymer brush were determined as 9.2%and 40.6%,*** release efficiency of imidacloprid in MSNs-g-PVNM was the lowest value of 5.4%at 20℃ and 365 nm,and it reached the highest value of 52.4%at 50℃ and 254 *** loss percentage of imidacloprid on the leaves contained imidacloprid-loaded MSNs-g-PVNM(8.4%)was much less than that contained only imidacloprid(25.2%)after three *** was confirmed that the release process of imidacloprid was well regulated through changing external conditions such as light and temperature.

关键词： N-vinylcaprolactam controlled release system stimuli-responsive mesoporous silica nanoparticles imidacloprid

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An Alkynyl-Dangling Ru(II) Polypyridine Complex for Targeted Antimicrobial Photodynamic Therapy

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CHEMISTRY-A EUROPEAN JOURNAL 2022年第6期28卷 e202103359-e202103359页

作者： Jian, Yao Jin, Zhihui Qi, shuang Da, xuwen Wang, Zhanhua Wang, Xuesong Zhou, Qianxiong Chinese Acad Sci Tech Inst Phys & Chem Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

To realize clinical application of antibacterial photodynamic therapy (aPDT), one of the most arduous challenges is how to render aPDT agents high selectivity against bacterial pathogens. In light of the fact that amino group-containing lipids are rich on the outer surfaces of Gram-positive bacteria, we herein constructed an alkynyl-dangling ruthenium(II) polypyridine complex (Ru2) to preferentially label Staphylococcus aureus (S. aureus) and methicillin-resistant Staphylococcus aureus (MRSA) over mammalian cells via the amino-yne bio-orthogonal click reaction. Thanks to the strong singlet oxygen generation ability, Ru2 could photo-inactivate S. aureus and MRSA effectively and specifically. Phosphatidylethanolamine (PE) molecules also exist in mammalian cells but are not accessible for Ru2, leading to its poor binding/uptake and negligible cytotoxicity in the dark and upon irradiation towards mammalian cells as well as low hemolysis, all favorable for aPDT application.

关键词： amino-yne click reaction antibacterial photodynamic therapy methicillin-resistant Staphylococcus aureus ruthenium(II) polypyridyl complexes Staphylococcus aureus

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α-Amylase and tyrosinase inhibitory activities, phenolic contents, and antioxidant capacities of wild and cultivated blueberries

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JOURNAL OF FOOD PROCESSING AND PRESERVATION 2021年第1期45卷 e15087-e15087页

作者： Tian, Sizhu Li, xuwen Zang, shuang Jin, Yongri Zhang, Ziwei Yu, Yong Jilin Univ Coll Chem Changchun Peoples R China Jilin Univ Coll Instrumentat & Elect Engn West Minzhu St 938 Changchun 130061 Peoples R China

The phenolic compound contents, antioxidant capacities, and alpha-amylase and tyrosinase inhibitory activities of 10 wild and 19 cultivated blueberries grown in northeast China were evaluated. The results showed that the alpha-amylase inhibitory activities of the blueberries represented, by 1/IC50, correlated with their total phenolic contents (TPCs). Moreover, the tyrosinase inhibitory activities correlated with the total anthocyanin contents (TACs). High-performance liquid chromatography and electrospray mass spectrometry were conducted to determine and identify seven phenolic acids. The average caffeic acid contents of the cultivated and wild blueberries were 277.37 and 17.71 mu g/g, respectively. The total phenolic, anthocyanin, and flavonoid contents were determined. Wild blueberries have higher TPCs, alpha-amylase inhibitory activities, and antioxidant capacities. Cultivated blueberries have higher TACs and exhibit tyrosinase inhibitory activities similar to those of the wild ones. Practical applications This study revealed that wild blueberries have high alpha-amylase inhibitory activities and are effective as natural alpha-amylase inhibitors for the treatment of diabetes. In addition, wild blueberries were found to be rich in phenolics and have high antioxidant capacities. Thus, because of these properties, wild blueberry products with antidiabetic and antioxidant potential can be developed for use in biomedical and pharmaceutical industries.

关键词： Amylases

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SnS分子低激发态光谱性质理论研究

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高师理科学刊 2024年第3期44卷 63-70页

作者：张续文闫爽吕浩男张存华李瑞齐齐哈尔大学理学院黑龙江齐齐哈尔161006 齐齐哈尔大学教师教育学院黑龙江齐齐哈尔161006

应用多参考组态相互作用(MRCI)方法计算了硫化锡(SnS)分子的第一解离极限对应的18个Λ-S态.计算时,Sn原子采用了包含ECP28MDF赝势的aug-cc-pwCVQWZ-PP基组,S原子采用aug-cc-pwCVQZ基组.根据计算得到的单点势能绘制了Sn S分子的势能曲线(... 详细信息

应用多参考组态相互作用(MRCI)方法计算了硫化锡(SnS)分子的第一解离极限对应的18个Λ-S态.计算时,Sn原子采用了包含ECP28MDF赝势的aug-cc-pwCVQWZ-PP基组,S原子采用aug-cc-pwCVQZ基组.根据计算得到的单点势能绘制了Sn S分子的势能曲线(PECs).基于PECs,应用数值方法求解薛定谔方程,得到了束缚态的光谱常数,理论计算的结果与已有的实验结果吻合较好.计算了18个Λ-S态的永久偶极矩(PDMs),并讨论了其变化规律.此外,还计算了1^(3)Π,1^(1)Σ^(-),1^(1)Δ,1^(3)Σ^(-),1^(3)Δ,1^(3)Σ^(+)态的耦合矩阵元,通过分析耦合矩阵元阐明了电子态之间的相互作用.最后,分析了2^(1)Σ^(+)-X^(1)Σ^(+),1^(1)Π-X^(1)Σ^(+),1^(1)Π-1^(1)Δ,1^(1)Π-1^(1)Σ^(-)态的跃迁性质,包括跃迁偶极矩(TDMs),Franck-Condon因子(FCFs)和自发辐射寿命.

关键词： SnS 势能曲线光谱常数跃迁偶极矩

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重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用对深Ⅱ度烧伤的影响

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中国美容整形外科杂志 2022年第7期33卷 413-416,434页

作者：李亮王旭文何丽彩李双蔺利剑赵龙刚李雯河北中石油中心医院整形手外烧伤科河北廊坊065000 廊坊永清康定精神病医院河北廊坊065600

目的观察重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用对深Ⅱ度烧伤患者的影响。方法选取2019年6月至2020年5月河北中石油中心医院整形手外烧伤科治疗的120例深Ⅱ度烧伤患者为研究对象,采用随机数字表法对患者分组:对照组1... 详细信息

目的观察重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用对深Ⅱ度烧伤患者的影响。方法选取2019年6月至2020年5月河北中石油中心医院整形手外烧伤科治疗的120例深Ⅱ度烧伤患者为研究对象,采用随机数字表法对患者分组:对照组1、对照组2、观察组,每组40例患者。对照组1采用削痂术联合重组人酸性成纤维细胞生长因子治疗,对照组2采用削痂术联合夫西地酸乳膏治疗,观察组采用削痂术联合重组人酸性成纤维细胞生长因子和夫西地酸乳膏治疗,3组患者均连续治疗至创面愈合。治疗前、治疗第20天测量白细胞介素-2(interleukin-2, IL-2)、肿瘤坏死因子-α(tumor necrosis factor-α, TNF-α)、白细胞介素-10(Interleukin-10, IL-10)、白细胞介素-6(interleukin-6, IL-6)、血管内皮生长因子(vascular endothelial growth factor, VEGF)、表皮细胞生长因子(epidermal cell growth factor, EGF)、金属蛋白酶组织抑制因子1(tissue inhibitor of metalloproteinase 1, TIMP-1)、转化生长因子β1(transforming growth factor β1, TGF-β1)水平,观察患者创面愈合时间,采用温哥华瘢痕量表(vancouver scar scale, VSS)评价3组患者瘢痕增生程度,记录患者不良反应情况。结果观察组TNF-α、IL-6水平低于对照组1和对照组2(P<0.05),观察组IL-2、IL-10水平高于对照组1和对照组2(P<0.05),观察组VEGF、EGF、TIMP-1、TGF-β1水平高于对照组1和对照组2(P<0.05),治疗第10、15、20天,3组创面愈合率升高(P<0.05),观察组创面愈合率高于对照组1和对照组2(P<0.05),观察组创面愈合平均时间低于对照组1和对照组2(P<0.05),观察组瘢痕血管分布、颜色、厚度和柔软度评分低于对照组1和对照组2(P<0.05),3组均无明显不良反应发生。结论重组人酸性成纤维细胞生长因子联合夫西地酸乳膏局部应用治疗深Ⅱ度烧伤患者,可降低促炎因子TNF-α、IL-6水平,提升抑炎因子IL-2、IL-10水平,抑制炎症,提升VEGF、EGF、TIMP-1、TGF-β1水平,提升创面愈合率,降低瘢痕增生,安全性较高。

关键词：重组人酸性成纤维细胞生长因子夫西地酸乳膏深Ⅱ度烧伤创面愈合瘢痕增生

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CNTs/CNFs/GCE电化学传感器的制备及其对木犀草素的检测

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广西科技大学学报 2025年第2期36卷 118-127页

作者：朱旭文郭双李春婷张丽文程昊唐婷范广西糖资源绿色加工重点实验室(广西科技大学) 广西柳州545006 广西柳州螺蛳粉工程技术研究中心(广西科技大学) 广西柳州545006 广西科技大学生物与化学工程学院广西柳州545006 杭州微念品牌管理有限公司浙江杭州310000

以碳纳米管(carbon nanotubes,CNTs)和聚丙烯腈(polyacrylonitrile,PAN)为前驱体,通过静电纺丝得到纳米纤维,后经碳化得到CNTs/CNFs复合材料。使用扫描电子显微镜(scanning electron microscope,SEM)、X射线衍射(X-ray diffraction,XRD)、能量色谱仪(energy dispersive spectroscopy,EDS)和电化学阻抗谱(electrochemical impedance spectroscopy,EIS)对其形貌和组成进行了表征;以滴涂法将此材料修饰到玻碳电极(glassy carbon electrode,GCE)表面,考察木犀草素在该复合电极上的电化学行为;最后将此修饰电极应用到金银花露中木犀草素的测定。结果表明:此修饰电极在检测木犀草素的试验中展现出良好的重复性、重现性和抗干扰能力;当木犀草素浓度在3~10μmol/L时,CNTs/CNFs/GCE修饰电极响应电流值与木犀草素浓度呈良好的线性关系,检测限为0.18μmol/L;用此复合电极检测金银花露中的木犀草素,加标回收率在96.069%~97.623%之间,相对标准偏差小于5.0%。

关键词：木犀草素碳纳米管静电纺丝法电化学加标回收率

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Determination of IgG by electron spin resonance spectroscopy using Fe₃O₄ nanoparticles as probe

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MICROCHEMICAL JOURNAL 2018年 141卷 444-450页

作者： Tian, Sizhu Jiang, Jia Zang, shuang Wang, Kun Yu, Yong Li, xuwen Zhang, Hanqi Yu, Aimin Zhang, Ziwei Jilin Univ Coll Chem Qianjin St 2699 Changchun 130012 Jilin Peoples R China Jilin Univ Coll Instrumentat & Elect Engn West Minzhu St 938 Changchun 130061 Jilin Peoples R China

A novel electron spin resonance (ESR) spectroscopy method for determination of rabbit IgG was presented. Anti rabbit IgG antibody was bound to Fe3O4 nanoparticles (FeNPs). The FeNPs were used as probe to give ESR signal. After the optimization of the assay, a molar ratio 500:1 of antibody to FeNPs was selected. The sepharose beads were used as solid phase and used to separate the analyte from the sample solution. Two typical immunoassay formats, sandwich and competitive formats, were applied to the determination of IgG. The analytical sensitivities obtained by sandwich and competitive formats were 0.13 mu g mL(-1) and 0.56 mu g mL(-1), respectively. The two formats were applied to the determination of the rabbit IgG in rabbit serum. The diluted sample was directly analyzed and other additional sample treatment was not required. The analytical results of the spiked samples indicated that the recoveries of the analytes were acceptable. Furthermore, the sample preparation time used in this method is shorter than most existing immunoassay methods.

关键词： Electron spin resonance Sandwich Competitive Fe3O4 nanoparticles Sepharose beads Rabbit serum

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液相色谱-串联质谱法检测猪肉中肾上腺素及其代谢物残留

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环境化学 2019年第3期38卷 701-703页

作者：李双刘忠义李露青周红玲徐旭文陈树兵宁波出入境检验检疫局检验检疫技术中心宁波315211 宁波大学应用海洋生物技术教育部重点实验室宁波315211

针对猪肉中新兴的肾上腺素及其代谢物3,4-二羟基扁桃酸、4-羟基-3-甲氧基-扁桃酸,基于"肾上腺素作用翻转"机理同步添加的异丙嗪,建立了超高效液相色谱-串联质谱检测方法.4种物质线性良好,相关系数均大于0.999;猪肉基质的定量... 详细信息

针对猪肉中新兴的肾上腺素及其代谢物3,4-二羟基扁桃酸、4-羟基-3-甲氧基-扁桃酸,基于"肾上腺素作用翻转"机理同步添加的异丙嗪,建立了超高效液相色谱-串联质谱检测方法.4种物质线性良好,相关系数均大于0.999;猪肉基质的定量限(LOQ, S/N=10)依次为25、100、5、0.1μg·kg^(-1),精密度(RSD)均小于10%,平均回收率在78.3%—92.5%.

关键词：高效液相色谱-串联质谱法肾上腺素残留检测猪肉

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Biocompatibility and effectiveness evaluation of a new hemostasic embolization agent: thrombin-loaded alginate-calcium microspheres

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JOURNAL OF THE AMERICAN COLLEGE OF CARDIOLOGY 2017年第16期70卷 C190-C191页

作者： Zhao, Lijun Li, Yang Rong, Jingjing Liang, Ming Zhang, xuwen Sun, Jingyang Jun, Li Liu, Dan Gao, Naijing Li, Fei Wang, Xiaozeng Han, Yaling shuang, Wang Peoples Liberat Army Inst Cardiovasc Res Dept Cardiol Beijing Peoples R China

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Dispersant-assisted dynamic microwave extraction of triazine herbicides from rice

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ANALYTICAL METHODS 2016年第18期8卷 3788-3794页

作者： Li, Dan Zhang, Ziwei Li, Na Wang, Kun Zang, shuang Jiang, Jia Yu, Aimin Zhang, Hanqi Li, xuwen Jilin Univ Coll Chem Qianjin St 2699 Changchun 130012 Peoples R China Harbin Inst Technol Weihai Sch Marine Sci & Technol Weihai 264209 Peoples R China

A rapid and effective sample pretreatment method, dispersant-assisted dynamic microwave extraction, was first applied to the extraction of six triazine herbicides from rice. The dynamic microwave extraction was coupled with matrix solid-phase dispersion (MSPD). The dispersant in MSPD was used to disperse the sample and adsorb impurities. Microwave irradiation was used to promote the transfer of the analyte and accelerate the extraction. The extraction and clean-up were performed simultaneously. The effects of experimental parameters, including the solvent type, volume of the extraction solvent, microwave power, type of dispersant, mass ratio of dispersant to rice, and flow rate of the extraction solvent, on the recoveries of the analytes were investigated. The limits of detection for the analytes ranged from 0.62 to 1.79 mu g kg(-1). The recoveries of the triazine herbicides in spiked rice samples were in the range of 84.3-101%, and the relative standard deviations were lower than 6.2%.

关键词： Microwave irradiation

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