印刷用铝板带的发展现状及其市场需求

综述了近年来胶印版材的发展概况,并对印刷用铝板带的质量要求、生产工艺和技术装备状况进行了详细阐述,同时从市场供需角度分析了印刷用铝板带的发展趋势:未来CTP版将占据主导地位.     

固体基质室温磷光猝灭法测定尿结石和人发中微量铋

报道了包含桑色素(Morin)的SiO2纳米微球(Morin-SiO2)的合成方法,并用JEM-2000EX型透射电子显微镜检测其微球粒径,达到50 nm.基于Morin-SiO2能在滤纸固体基质上发射强而稳定的室温磷光,铋可使室温磷光猝灭,据此建立了Morin-SiO2固体基质室温磷光猝灭法测定痕量铋的新方法.铋的含量在0.16～14.4 ag/斑(浓度范围0.40～36.0 fg/ML,0.4 μL/斑)内与△Ip值成线性关系,方法检出限0.026 ag/斑(对应浓度6.5×10-17 g/mL),本法灵敏度高,重现性好,简捷快速,用于尿结石、人发样品的测定,结果满意.     

基质、插穗及促根剂对喜树扦插生根的影响

为探索不同处理对喜树硬枝扦插生根的影响及扦插生根与体内营养物质含量之间的关系,以1年生喜树枝条为材料,从基质种类、插穗部位、长度及粗度、ABT与NAA浓度等方面研究了不同处理对生根的影响,同时测定了喜树生根过程中可溶性糖、淀粉和蛋白质3种营养物质的含量。结果表明,泥炭土中插穗生根率最高,达96.67%; 选用1年生实生苗下部插穗的成活率最高,为97.33%; 粗度为0.6～0.9 cm、长度为10.0～15.0 cm的插穗,更利于生根。沙藏过的喜树插穗生根率高于不沙藏枝条。质量浓度为250 mg/L的ABT处理插穗效果最好,生根率达86.67%。硬枝扦插的喜树插穗是以皮部生根为主,兼有部分愈伤组织生根。生根过程中插穗基部的可溶性糖含量呈急剧下降后升高和再下降再上升的趋势,淀粉含量呈升高—降低—升高—降低的变化趋势,而蛋白质含量变化趋势与前两者都不一致。     

荧光物质的酯类衍生物用作人血胆碱酯酶底物的研究

合成了几种荧光物质4－甲基伞形酮、荧光素、二溴荧光素的乙酸酯及丁酸酯,研究了它们用作人血胆碱酯酶（ChE）底物进行活性测定的各种条件,通过米氏常数（Km）和人血ChE稀释比曲线的测定系统地比较了六种物质作为底物与ChE作用的特异性和灵敏度。结果表明荧光物质量子产率越高、发射波长越长、酯基的烃基链越长的物质,用作人血ChE活性测定底物的选择性和灵敏度越好。     

A review of GaN-based optoelectronic devices on silicon substrate

Group Ⅲ-nitride material system possesses some unique properties,such as large spectrum coverage from infrared to deep ultraviolet,wide energy band gap,high electron saturation velocity,high electrical breakdown field,and strong polarization effect,which enables the big family has a very wide application range from optoelectronic to power electronic area.Furthermore,the successful growth of GaN-related III-nitride material on large size silicon substrate enable the above applications easily realize the commercialization,because of the cost-effective device fabrication on the platform of Si-based integrated circuits.In this article,the progress and development of the GaN-based materials and light-emitting diodes grown on Si substrate were summarized,in which some key issues regarding to the material growth and device fabrication were reviewed.     

固定化柚皮苷酶解转化制备普鲁宁

选择D101-1大孔吸附树脂固定化反应底物柚皮苷,考察α-L-鼠李糖苷酶水解柚皮苷转化普鲁宁的工艺条件,结果表明,其最适条件为:α-L-鼠李糖苷酶用量30 U/mL,最适酶反应温度60 ℃,pH=4.0,底物质量浓度2.4 g/L,振荡速率80 r/min。在此条件下酶解反应420 min,柚皮苷转化率达到78%。此外,研究发现,高浓度的Mn2+、Fe2+对酶解反应有极强的促进作用。Lineweaver-Burk双倒数拟合曲线的Km=5.12 g/L,Vmax=0.013 g/(L·min)。利用薄层色谱(thin layer chromatography,TLC）和高效液相色谱（high performance liquid chromatography,HPLC）对酶解产物进行分析,并验证得出,反应完全后可得到纯的反应产物普鲁宁。     

磁控溅射制备TiO_2薄膜及其光学特性研究

采用直流反应磁控溅射法在玻璃衬底上制备TiO2薄膜.用紫外-可见光分光光度计和AFM分别表征了薄膜的透射率和表面形貌,用包络线法详细研究了不同衬底温度下TiO2薄膜的光学特性.结果表明:薄膜在可见光波段有很高的透明度,且随着衬底温度的升高,薄膜的透射率略有增加,薄膜的折射率和吸收系数增大,薄膜的光学带隙减小;同时,薄膜表面粗糙度减小,薄膜变得平整.     

Preparation and properties of AZO thin films on different substrates

Al doped ZnO (AZO) films were deposited on glass, polyethylene naphthalate (P EN) and polyethylene terephthalate (PET) at room temperature by radio frequency magnetron sputtering. The structural, surface morphology, electrical and optical properties of the AZO films were characterized by X-ray diffractometry (XRD), atomic force microscopy (AFM), Hall effect measurement and ultraviolet-visible spectrometer, respectively. The films exhibit highly c-axis preferred orientation, a nd AZO film on glass exhibits compressive stress while that on plastic subs trates presents tensile stress. The electr ical property of the AZO film on glass is the best among the films on three kinds of substrates. The value of the figure of merit for the AZO film on PEN is much better than that of the AZO film on PET and is close to that of AZO on glass in the wavelength range of 500? 900 nm.     

一种基于低温共烧陶瓷的新型多层交叉耦合基片集成波导滤波器

提出了一种4级交叉耦合的拓扑结构,并用其设计了一个多层基片集成波导滤波器.非相邻谐振腔间的交叉耦合使滤波器产生了2个有限传输零点,改善了滤波器的性能.用高频电磁仿真软件HFSS对滤波器进行设计和仿真,并用8层低温共烧陶瓷（LTCC）工艺对其进行加工.测量结果与仿真结果吻合较好,从而证明了所给滤波器结构的有效性.     

废液晶屏玻璃基板浮选分离与微晶化利用

针对废液晶屏玻璃基板分离困难与后续资源化利用的问题 ,提出热处理-浮选高效分离玻璃颗粒,后进一步采用烧结法制备微晶玻璃材料。发现当热处理温度为200℃时,液晶屏释放气态挥发物较少,同时热处理后浮选效率达到了93%。将得到的高纯度玻璃基板颗粒和普通废玻璃作为原料制备微晶玻璃,在最佳原料配比(废液晶显示屏玻璃基板30%,废玻璃26%),烧结温度1140℃,时间120 min条件下,烧结出的微晶玻璃具有致密度高、抗弯强度好、耐侵蚀性强的特点。