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The Role of Renewable Protocatechol Acid in Epoxy Coating Modification: Significantly Improved Antibacterial and Adhesive Properties

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Chinese Journal of Polymer Science 2024年第1期42卷 63-72,I0008页

作者： Ming-Xuan Chen Jin-Yue Dai Li-Yue zhang Shuai-Peng Wang Jing-Kai Liu Yong-Gang Wu Xin-Wu ba Xiao-Qing Liu School of Chemistry and Materials Science Hebei UniversityBaoding 071000China Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China Key Laboratory of Marine Materials and Related Technologies Chinese Academy of SciencesNingbo 315201China

It is of great significance to design epoxy coatings with superior antibacterial properties and high adhesive properties, as well as excellent processing, superior durability, and high transparency. However, it is still a challenge because of the common complex design and synthesis. Herein, the bio-based monomer protocatechuic acid(PCA) was used as raw material, the catechol structure with high bonding and antibacterial properties was introduced into the flexible alkane segment of ethylene glycol diglycidyl ether(EGDE) through an efficient, and green method, and it was cured with isophorone diamine(IPDA) to prepare corresponding thermosets. The cured resins exhibited excellent allaround qualities, particularly in bonding and antibacterial. When 30% PCA was added to pure epoxy resin, the adhesion between substrate and coating increased from 4.40 MPa to 13.60 MPa and the antibacterial rate of coating against E. coli and S. aureus could approach 100%. All of this is due to the fact that the catechol structure present in PCA has the ability to interact with various substrates and alter the permeability of bacterial cell membranes. The architecture of this method offers a fresh approach to dealing with the issues of challenging raw material selection and complex synthesis techniques.

关键词： Epoxy coatings Thermosets Catechol structure Antibacterial High adhesion

Influence of Solid Fraction on Gravity Segregation of Sn in A1-20Sn Alloy Casting

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Journal of Materials Science & Technology 2000年第6期16卷 577-580页

作者： zhang P. Du Y.H. zeng D.B. Cui J.z. ba L.M. Dep. of Mechanical Eng. Tsinghua Univ. Beijing 100084 China

The influence of solid fraction of Al-20Sn alloy mushy on gravity segregation of Sn in casting was studied . The relationship between solid fraction and the temperature of alloy mushy and that between solid fraction of alloy mushy and size of Sn particle in ingot were determined. The results show that the relationship between solid fraction and the temperature of alloy mushy was fs=1683-4.86t+0.003 5t2. The extent of gravity segregation of Sn in casting reduced gradually with the increase of solid fraction of alloy mushy. When solid fraction of alloy mushy was larger than 40%, the gravity segregation of Sn in casting could be removed basically, and the relationship between solid fraction of alloy mushy and size of Sn particle in ingot was s=-0.64fs+70.8.

关键词： Metal casting

Exploring a natural MDR reversal agent: potential of medicinal food supplement Nerium oleander leaf distillate

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Asian Pacific Journal of Tropical Biomedicine 2013年第8期3卷 644-649页

作者： Meltem Demirel Kars Ufuk Gündüz Kamilüney AhmetLevent ba Seluk University Saraynü Vocational High School42430 KonyaTurkey Seluk University Advanced Technology Research and Application Center42075 KonyaTurkey Middle East Technical University Department of Biological Sciences06531 AnkaraTurkey Selcuk University Faculty of Veterinary MedicineDepartment of Toxicology and Pharmacology42075KonyaTurkey Selcuk University Faculty of Veterinary MedicineDepartment of Toxicology and Pharmacology42075KonyaTurkeyy

Objective:To investigate the molecular effects ofNerium oleanderleaf distillate on paclitaxel and vincristine resistant(MCF-7/Pac and MCF-7/Vinc)cells and sensitive(MCF-7/S)cell ***:Nerium oleander(***)leaf extract was obtained by hydrodistillation *** toxicological effects ***,previously suggested as medicinal food supplement,on drug resistant cells were evaluated by XTT *** modulation potential of the plant material was evaluated by flow cytometry and fluorescent *** and vincristine were applied to the sublines in combination with ***:Fractional inhibitory indices show *** did not increase the antiproliferative effects of anticancer *** in to MCF-7/Pac and MCF-7/Vinc did not inhibit P-gp activity and MDR1 gene expression ***:As a result it may be suggested that *** has some medicinal effects as food supplement it may not be suitable as an MDR modulator for drug resistant breast cancer cells.

关键词： Nerium oleander MCF-7 FRSA activity MDR reversal Medicinal food supplement

贵州紫皮百香果果腐病病原菌的鉴定及其与各发育阶段真菌微生物群落的关系

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湖南农业大学学报（自然科学版） 2024年第2期50卷 57-64页

作者：雷霁卿石银娜巴良杰吉宁王瑞贵阳学院食品科学与工程学院贵州贵阳550005

对分离自贵州紫皮百香果果腐病病原菌进行形态学及分子鉴定,确定致病菌15株,分属可可毛色二孢菌(Lasiodiplodia brasiliensis),层出镰孢菌(Fusarium proliferatum),间作壳菌(Diaporthe tectonendophytica、***、***、***);致病性观察显示,15株致病菌中包括弱致病力菌株1株、中致病力菌株4株、较强致病力菌株4株、强致病力菌株6株,***菌株BXG-z-1及***菌株均为强致病力菌株。分析百香果不同发育阶段真菌微生物多样性,结果表明,百香果花、百香果幼果、百香果成熟果实真菌OTU数量分别为26、23、20,Simpson指数为0.095~0.113,真菌群落多样化程度低;Shannon指数均低于0.5,真菌微生物类群落分布均匀程度低,与之相对应的,Microdium spp.相对丰度在百香果不同发育阶段均超过90%;百香果花中Cladosporium spp.、Ruinenia spp.相对丰度最高,幼果时降至最低,至成熟果实期又再次上升;百香果花中Trichoderma spp.、Bipolaris spp.、Amanita spp.、Monilinia spp.、Cercospora spp.相对丰度显著高于百香果幼果的,并随着果实发育成熟降至最低。

关键词：紫皮百香果病原菌微生物多样性贵州

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Bi_(2)Te_(3)基热电材料中的声子工程

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硅酸盐学报 2024年第1期52卷 203-217页

作者：刘志愿管希成李周马妮马俊杰巴倩夏爱林晋传贵安徽工业大学材料科学与工程学院安徽马鞍山243002 安徽工业大学先进金属材料绿色制备与表面技术教育部重点实验室安徽马鞍山243002 安徽大学材料科学与工程学院合肥230601 中国科学技术大学化学与材料科学学院合肥230026

Bi_(2)Te_(3)基合金因其优异的电输运性能和较低热导率在低温区热电材料中备受关注。然而由Bi_(2)Te_(3)基合金制造的热电发电或制冷器件转化效率仍较低,因此进一步提升Bi_(2)Te_(3)基材料的热电优值zT是关键。由于晶格热导率与电性能... 详细信息

Bi_(2)Te_(3)基合金因其优异的电输运性能和较低热导率在低温区热电材料中备受关注。然而由Bi_(2)Te_(3)基合金制造的热电发电或制冷器件转化效率仍较低,因此进一步提升Bi_(2)Te_(3)基材料的热电优值zT是关键。由于晶格热导率与电性能参数关联较少,在热电性能参数中较为独立,因此,在不影响电性能的前提下,通过声子工程降低晶格热导率成为提升zT值的重要方法。本文主要综述了近年来通过纳米改性、超晶格结构、纳米复合、掺杂和引入位错阵列等声子工程优化Bi_(2)Te_(3)基材料热电性能的主要研究进展。通过这些优化手段可以显著降低材料的比热容、声子群速度或声子平均自由程,Bi_(2)Te_(3)基材料的晶格热导率显著降低,热电性能大幅提升,为热电器件的应用提供科学和技术支撑。

关键词：碲化铋基热电材料声子工程晶格热导率热电性能

A rare case of giant solitary spinal B cell lymphoblastic lymphoma

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Chinese Neurosurgical Journal 2016年第4期2卷 245-248页

作者： Hermann Adonis N'da Kporou Landry Drogba Louis Derou Slim Alban Mbende Dominique N'dri Oka Vincent ba.zézé Service de Neurochirurgie CHU de Yopougon Abidjan C(o)te d'lvoire 21 BP 632 Abidjan C(o)te d'lvoire

background:Common B cell lymphoma locations are lymph nodes,skin,bone,mediastinum and it accounts for 2 ％ of *** solitary spinal B-LBL has not yet been *** presentation:A 15-years old boy was admitted for a painful swelling of the thoracolumbar spine and *** showed a voluminous mass of the thoracolumbar *** treatment consisted of surgical decompression and stabilization,followed by chemotherapy and *** examination showed a *** quality of life improved ***:To the best of our knowledge,this is the first case of giant solitary spinal B-LBL ever *** to choose a treatment method over another should weigh on individual *** should be considered as initial treatment option in this atypical lesion.

关键词： B Lymphoblastic lymphoma Spinal tumour Spine surgery

SPME as a green sample-preparation technique for the monitoring of phytocannabinoids and endocannabinoids in complex matrices

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Journal of Pharmaceutical Analysis 2023年第10期13卷 1117-1134页

作者： Katarzyna Wozniczka PawełKonieczynski Alina Plenis Tomasz ba˛czek Anna Roszkowska Department of Pharmaceutical Chemistry Medical University of GdanskGdanskPoland Department of Analytical Chemistry Medical University of GdanskGdanskPoland

The endocannabinoid system(ECS),particularly its signaling pathways and ligands,has garnered considerable interest in recent *** with clinical work investigating the ECS’functions,including its role in the development of neurological and inflammatory conditions,much research has focused on developing analytical protocols enabling the precise monitoring of the levels and metabolism of the most potent ECS ligands:exogenous phytocannabinoids(PCs)and endogenous cannabinoids(endocannabinoids,ECs).Solid-phase microextraction(SPME)is an advanced,non-exhaustive sample-preparation technique that facilitates the precise and efficient isolation of trace amounts of analytes,thus making it appealing for the analysis of PCs and ECs in complex matrices of plant and animal/human *** this paper,we review recent forensic medicine and toxicological studies wherein SPME has been applied to monitor levels of PCs and ECs in complex matrices,determine their effects on organism physiology,and assess their role in the development of several diseases.

关键词： Phytocannabinoids Endocannabinoids Solid-phase microextraction Plant material Biological matrix

磁共振IDEAL-IQ和IVIM-DWI在脊柱转移瘤和骨髓瘤鉴别中的价值

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临床放射学杂志 2024年第7期43卷 1175-1180页

作者：王帅娜巴义文闫瑞芳周凤梅李政韩东明新乡医学院第一附属医院磁共振科卫辉453100 新乡医学院第一附属医院骨科卫辉453100

目的探索磁共振水脂分离成像(IDEAL-IQ)和体素内不相干运动成像(IVIM)在脊柱转移瘤和骨髓瘤鉴别中的价值。方法共45例脊柱转移瘤和26例骨髓瘤患者接受了IDEAL-IQ和IVIM扫描,分别测量并对比脊柱转移瘤组与骨髓瘤组间脂肪分数(FF)、R_(2)^... 详细信息

目的探索磁共振水脂分离成像(IDEAL-IQ)和体素内不相干运动成像(IVIM)在脊柱转移瘤和骨髓瘤鉴别中的价值。方法共45例脊柱转移瘤和26例骨髓瘤患者接受了IDEAL-IQ和IVIM扫描,分别测量并对比脊柱转移瘤组与骨髓瘤组间脂肪分数(FF)、R_(2)^(*)、标准表观扩散系数(ADC_(stand))、真性扩散系数(D)、假性扩散系数(D^(*))、灌注分数(f)、分布扩散系数(DDC)和扩散异质性指数(α)值的差异。采用逻辑回归(LR)分析寻找独立预测因子,受试者工作特征曲线(ROC)曲线下面积(AUC)和DeLong检验分别被用于评估各参数诊断效能以及不同参数AUC间的差异。结果骨髓瘤组的FF、R_(2)^(*)、ADC_(stand)、D、DDC和α值均低于转移瘤组,D^(*)值高于转移瘤组(P均z=4.362、3.766、3.119、3.195、4.389、2.911、2.781,P<0.001、<0.001、0.002、0.001、<0.001、0.003、0.005)。结论FF、R_(2)^(*)、D和α是脊柱转移瘤和骨髓瘤鉴别的独立预测因子,将其进行联合相较单一参数其能更好地对上述疾病进行鉴别。

关键词：脊柱转移瘤骨髓瘤水脂分离技术体素内不相干运动成像

Is the polydispersity exponent of the hyperbranched polymers the 3/2 or 5/2?

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Chinese Science Bulletin 2006年第12期51卷 1526-1528页

作者： ba Xinwu LIU Ying WANG Sujuan WANG Haijun College of Chemistry and Environment Science Hebei University Baoding 071002 China Department of Chemistry Hebei Normal University of Science and Technology Qinhuangdao 066600 China

The number of the hyperbranched polymers in the system is investigated for the polymerization process to give the asymptotic form of the concentration of the n-mer. The polydispersity exponent is calculated, which coincides with that of the classical result. Finally, the asymptotic forms of the number, the weight and the z-average degrees of the polymerization were evaluated analytically to obtain polydispersity index, which is close to 1 as the reaction is quantitatively completed.

关键词：超分支聚合体多分散指数聚合过程渐近形式