检索结果-南通市图书馆

Synthesis,Characterization of Polyethylene Ionomers and Their Antibacterial Properties

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2024年第8期42卷 1077-1084页

作者： Jia-Jia Wu Fei wang Peng-qi wan Li Pan Chun-Sheng Xiao Zhe Ma Yue-Sheng Li Tianjin Key Lab Composite&Functional Materials School of Materials Science and EngineeringTianjin UniversityTianjin 300350China Key Lab Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

Owing to its high production volume and wide range of application s,polyethylene has gained a great deal of attention,but its low surface energy and non-polar nature have limited its application in some important *** this study,ethylene/11-iodo-1-undecene copolymers were prepared and used as the intermediates to afford a series of imidazolium-based ionomers bearing methanesulfonate(CH_(3)SO_(3)^(-)),trifluoromethanesulfonate(CF_(3)SO_(3)^(-)),or bis(trifluoromethane)sulfonimide(Tf_(2)N^(-))*** tensile test results showed that the stress-at-break(7.8-25.6 MPa)and the elongation-at-break(445%-847%)of the ionomers could be adjusted by changing the counterion species and the ionic group *** importantly,the ionomers exhibited marvelous antibacterial activities against Staphylococcus aureus(***)and Escherichia coli(***).The ionomers bearing Tf_(2)N^(-)exhibited antibacterial activities>99%against both *** and *** when ionic content reached 9.1%.The imidazolium-based ionomers prepared in this work demonstrated excellent comprehensive properties,especially highefficient and broad-spectrum antibacterial ability,exhibiting the potential fo r the application as the antibacterial materials in packaging,medical,and other fields.

关键词： Polyethylene Ionomer Polymerization catalysis Imidazolium Antibacterial material

在线全文

学校读者我要写书评

暂无评论

CdZnT e晶片表面化学抛光研究

人工晶体学报 2005年第5期34卷 790-793,804页

作者：汪晓芹介万奇杨戈西北工业大学材料科学与工程学院西安710072

采用不同浓度的B r2-M eOH作为抛光液对CdZnTe进行化学抛光,发现用2%B r2-M eOH腐蚀时速率平稳且易于控制,能有效去除表面划痕,获得光亮表面。AFM分析发现,抛光后表面粗糙度降低30%,平整度增加。XPS分析发现CdZnTe的(111)Cd极性面变成了... 详细信息

采用不同浓度的B r2-M eOH作为抛光液对CdZnTe进行化学抛光,发现用2%B r2-M eOH腐蚀时速率平稳且易于控制,能有效去除表面划痕,获得光亮表面。AFM分析发现,抛光后表面粗糙度降低30%,平整度增加。XPS分析发现CdZnTe的(111)Cd极性面变成了富Te非极性表面。PL分析发现表面陷阱态密度降低,表面晶格的完整性增强。

关键词： CdZnTe 化学抛光腐蚀速率平均粗糙度表面组成缺陷

Au与p-CZT接触的界面势垒研究(英文)

在线全文

学校读者我要写书评

暂无评论

功能材料 2006年第7期37卷 1146-1148页

作者：李强介万奇傅莉查钢强西北工业大学材料科学与工程学院陕西西安710072

用同步光电子能谱研究了NH4F/H2O2钝化p-CZT表面效应,钝化处理晶体表面后,表面态能峰消失。用未钝化和钝化两种工艺方法来对比p-CZT晶体表面的钝化效果。同时用同步光电子能谱研究了Au与p-CZT接触的界面势垒。其中界面势垒可以由价带区... 详细信息

用同步光电子能谱研究了NH4F/H2O2钝化p-CZT表面效应,钝化处理晶体表面后,表面态能峰消失。用未钝化和钝化两种工艺方法来对比p-CZT晶体表面的钝化效果。同时用同步光电子能谱研究了Au与p-CZT接触的界面势垒。其中界面势垒可以由价带区域的新能级EV-C和新能级与Fermi能级的差决定。未钝化和钝化的Au/p-CZT的界面势垒分别为(0.88±0.1)eV和(1.17±0.1)eV。

关键词：同步光电子能谱界面势垒钝化

在线全文

学校读者我要写书评

暂无评论

ZnSe多晶料的提纯与化学比的控制

功能材料 2007年第11期38卷 1759-1761,1765页

作者：刘长友介万奇何克西北工业大学材料学院陕西西安710072 长安大学成矿作用及其动力学开放研究实验室陕西西安710064

采用区域升华法对由两单质直接合成的ZnSe多晶原料进行了处理。电感耦合等离子体质谱仪(ICP-MS)分析结果表明,区域升华法对高纯原料中杂质的去除率仅为10%左右。X射线衍射(XRD)和能谱分析(EDS)结果表明提纯后原料的化学比得到了有效调节... 详细信息

采用区域升华法对由两单质直接合成的ZnSe多晶原料进行了处理。电感耦合等离子体质谱仪(ICP-MS)分析结果表明,区域升华法对高纯原料中杂质的去除率仅为10%左右。X射线衍射(XRD)和能谱分析(EDS)结果表明提纯后原料的化学比得到了有效调节,其多晶化学比与单晶的化学比非常接近,适于单晶生长使用。采用区域升华法处理高纯多晶原料的主要目的应该放在去除过量元素和调节原料化学比上。

关键词：硒化锌多晶提纯非化学计量比

碘化汞(α-HgI_2)晶体生长及其性能表征

在线全文

学校读者我要写书评

暂无评论

人工晶体学报 2008年第4期37卷 795-799页

作者：许岗介万奇王领航西北工业大学凝固技术国家重点实验室西安710072

利用垂直两温区透明油浴炉,采用升华法成功生长了α-HgI2单晶体。通过对比不同生长阶段晶体生长界面,观察到HgI2晶体在气相生长中存在界面形貌转变。晶体生长初期的生长面呈棱面,然后逐渐转变为圆滑界面。利用XRD、透射光谱以及I-V测试... 详细信息

利用垂直两温区透明油浴炉,采用升华法成功生长了α-HgI2单晶体。通过对比不同生长阶段晶体生长界面,观察到HgI2晶体在气相生长中存在界面形貌转变。晶体生长初期的生长面呈棱面,然后逐渐转变为圆滑界面。利用XRD、透射光谱以及I-V测试对所生长晶体的性能进行了表征。XRD结果表明所生长的晶体为单相的α-HgI2晶体,晶体的生长方向为[001]。紫外-可见-近红外透过光谱分析发现,HgI2晶体的截至波长为580 nm,对应的禁带宽度为2.12 eV,近红外区内透过率约为45%。由于空穴的俘获及陷阱能级作用,在2307.5 nm和1731.4 nm处产生了两个明显的吸收峰。所生长的α-HgI2晶体电阻率约为1011Ω.cm,满足制作核辐射探测器的要求。

关键词：碘化汞晶体形貌转变 XRD 近红外透过率 I-V特性

Long non-coding RNA GATA6-AS1 is mediated by N6-methyladenosine methylation and inhibits the proliferation and metastasis of gastric cancer

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第3期16卷 1019-1028页

作者： Jun-jie Shen Min-Chang Li Shao-qi Tian Wen-Ming Chen Department of Oncology Jiangxi Hospital of Integrated Chinese and Western MedicineNanchang 330000Jiangxi ProvinceChina Department of Hepatopancreatobiliary Surgery Jiangxi Hospital of Integrated Chinese and Western MedicineNanchang 330000Jiangxi ProvinceChina Clinical Medical School Jining Medical UniversityJining 272000Shandong ProvinceChina Department of Oncology Jining No.1 People’s HospitalJining 272011Shandong ProvinceChina

BACKGROUND Through experimental research on the biological function of GATA6-AS1,it was confirmed that GATA6-AS1 can inhibit the proliferation,invasion,and migration of gastric cancer cells,suggesting that GATA6-AS1 plays a role as an anti-oncogene in the occurrence and development of gastric *** experi-ments confirmed that the overexpression of fat mass and obesity-associated protein(FTO)inhibited the expression of GATA6-AS1,thereby promoting the occurrence and development of gastric *** To investigate the effects of GATA6-AS1 on the proliferation,invasion and migration of gastric cancer cells and its mechanism of *** We used bioinformatics methods to analyze the Cancer Genome Atlas(https://***/.The Cancer Genome Atlas)and download expression data for GATA6-AS1 in gastric cancer tissue and normal *** also constructed a GATA6-AS1 lentivirus overexpression vector which was transfected into gastric cancer cells to investigate its effects on proliferation,migration and invasion,and thereby clarify the expression of GATA6-AS1 in gastric cancer and its biological role in the genesis and development of gastric ***,we used a database(http://***/starbase2/)to analysis GATA6-AS1 whether by m6A methylation modify regulation and predict the methyltransferases that may methylate ***,RNA immunoprecipitation experiments confirmed that GATA6-AS1 was able to bind to the m6A methylation modification *** data allowed us to clarify the ability of m6A methylase to influence the action of GATA6-AS1 and its role in the occurrence and development of gastric *** Low expression levels of GATA6-AS1 were detected in gastric *** also determined the effects of GATA6-AS1 overexpression on the biological function of gastric cancer ***6-AS1 had strong binding ability with the m6A demethylase FTO,which was expressed at high levels in gastric cancer and negatively correlat

关键词： Long non-coding RNA GATA6-AS1 N6-methyladenine modification Fat mass and obesity-associated protein Gastric cancer

N,S,Br co-doped carbon dots:One-step synthesis and fluorescent detection of 6-mercaptopurine in tablet

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2024年第2期14卷 291-293页

作者： qi wang Ying Cheng Lifeng Ding Shengling Li jie Zhang Yulan Niu Ziye Jing Chemistry&Chemical Engineering Department Taiyuan Institute of TechnologyTaiyuan030008China Department of Anesthesiology First Hospital of Shanxi Medical UniversityTaiyuan030001China

6-mercaptopurine(6-MP),a purine derivative(3,7-dihydropurine-6-thione),has been utilized as an effective immunosuppressive drug for clinically treating leukemia and other autoimmune diseases[1].6-MP and its corresponding metabolites can suppress the function of RnaseH,and thus they are cytotoxic and threaten the human health[2].Therefore,the accurate quantification of 6-MP is *** date,researchers continue to expend considerable effort in developing 6-MP detection *** analysis eliminates disadvantages,such as toxic solvents,expensive equipment.

关键词： purine synthesis eliminate

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

镁合金低压铸造专用混合保护气体系统

铸造 2011年第3期60卷 268-270,275页

作者：李新雷郝启堂介万奇西北工业大学凝固技术国家重点实验室陕西西安710072

研制了一种镁合金低压铸造专用混合保护气体系统。该系统可实现压缩空气、SF6以及CO2三种气体按比例混合,并提供常压熔炼、低压过程保护、泄露保护三路供气支路。实际应用表明,该混气系统可实现对镁合金低压铸造全过程的有效阻燃保护。

关键词：镁合金混气系统低压铸造

在线全文

学校读者我要写书评

暂无评论

CdS薄膜的生长和结构分析

功能材料 2006年第9期37卷 1408-1410页

作者：蔡小梅陈福义介万奇西北工业大学材料学院陕西西安710072

使用化学浴沉积(CBD)在硫酸镉-硫脲的氨溶液中,成功地制备出了高质量的CdS薄膜。用扫描电境(SEM)、X射线衍射(XRD)及紫外-可见-近红外光谱仪对其进行了测试分析,结果表明,NH3摩尔浓度对生成CdS薄膜的表面致密性影响很大,当NH3摩尔浓度... 详细信息

使用化学浴沉积(CBD)在硫酸镉-硫脲的氨溶液中,成功地制备出了高质量的CdS薄膜。用扫描电境(SEM)、X射线衍射(XRD)及紫外-可见-近红外光谱仪对其进行了测试分析,结果表明,NH3摩尔浓度对生成CdS薄膜的表面致密性影响很大,当NH3摩尔浓度比较大时,无法生成连续致密的胶体颗粒薄膜,反应体系中S2-和Cd2+溶液的摩尔浓度增加,CdS胶体粒度增大。在相同NH3摩尔浓度下,随着S2-和Cd2+摩尔浓度比值([S2-]/[Cd2+])的增大,CdS胶体粒子粒度减小;透过光谱的峰位随着胶体粒子尺寸的减小向短波方向移动,当NH3摩尔浓度变化时,在一定的范围内改变CdS膜的透过率。将化学浴沉积(CBD)过程的研究从薄膜厚度优化改进为胶体粒子尺寸优化,促进了CBD技术的发展。

关键词： CdS薄膜化学浴沉积胶体粒子