混合机减速器高速轴承结构的改进

本文就圆筒混合机械减速器高速小弧齿锥齿的轮经常的断的原因进行了分析，同时地减速器的高速轴承的安装结构进行了改进，弥补了混合机减速器存在的设计缺陷，保证了上料线设备的稳定、顺行。     

MCM—41中孔分子筛的研究和开发

介绍了近期国内外中孔分子筛ＭＣＭ－４１的研究情况，阐述了其合成机理并简述了其性能和应用。     

Enhanced Release of Drugs from Silicone Elastomers (III): Subcutaneous Controlled Administration of Melatonin for Early Onset of Estrus Cycles in Ewes

Implants were fabricated from swellable silicone elastomers to release hydrophilic melatonin at a controlled rate for the early induction of breeding season in ewes. Both the in vitro and in vitro release profiles of melatonin were observed to follow a linear Q vs. t^1/2 relationship. The in vitro/in vivo release flux ratio ranging from 0.415 to 1.452 was obtained depending upon the polyethylene glycol 400 concentration in the aqueous release medium used for in vitro studies. The release flux (Q/t^1/2) of melatonin from the implants was observed to increase as a function of the glycerol content in the silicone elastomers. When the ewes were treated with subdermal implants containing 25% w/w of melatonin for up to 49 days, blood melatonin levels above the target level of 450-900 pmole/1 were achieved and maintained for at least 35 days.     

锆铀合金中痕量硼的同位素稀释质谱法测定

本文介绍了用同位素稀释技术测定锆铀合金试样中痕量硼的方法。选用富集~(10)B为同位素稀释剂,用硫酸-硫酸铵溶样,使硼形成挥发的硼酸甲酯与基样分离,用热电离质谱仪进行硼的同位素比值测量。方法的检测下限为1.5ng(硼)。对于含硼量小于1.0μg/g(样)的锆铀合金试样,相对标准偏差小于±1.0%。     

Preparation,intermolecular motion,and thermal properties of thiodiphenyl epoxy

The thiodiphenyl epoxy (THEP) was prepared by the 4,4′‐thiodiphenol (THDOL) and the epichlorohydrin (ECH) without using any NaOH or KOH catalysts. The THEP possessed weak hydrogen bonding in the cured THEP/DGEBA system. The intermolecular motion parameters k and q were 0.26 and ?168.5, respectively, which determined by the Gordon‐Taylor and Kwei equations. The soft sulfide linkage (? S? ) of the THEP degraded at lower temperature than cured DGEBA material, and further to form various thermal stable sulfate derivative chars. The char yields increased from 11.43 to 25.94 wt % and from 0.65 to 1.04 wt % in the nitrogen and air, respectively. Introduction of the THEP into the DGEBA could provide the antioxidation thermal property and improve the thermal stability of the DGEBA epoxy in the air. In the air atmosphere, the activation energies of the second thermal degradation were increased from 66.67 to 103.42 kJ/mol. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Intermolecular force and thermal properties of the sulfonyl epoxy blends cured with DGEBA epoxy

The sulfonyl epoxy monomer (SEP) was synthesized and further to blend with the diglycidyl ether of bisphenol A (DGEBA). The glass transition temperature (T_g) of the SEP/DGEBA blended materials increased from 103.7 to 163.8°C. The cross‐linking density and polymer chain self‐association intra‐molecular action affected more than that the polymer–polymer intermolecular action (hydrogen bonding) in the SEP blended with the DGEBA materials. The excess stabilization energy in the overall stabilization was only 0.00145% (14.5 ppm), which indicated that the polymer‐polymer intermolecular action was weak. The thermal degradation of the SEP segments could form various sulfate derivatives at lower temperature and analyzed by the TGA/GC/Mass. The sulfate derivatives could generate the thermal stable chars, which provided the “shielding effect” and antioxidation property. Additionally, these chars could also improve the protective effect and inhibit the thermal‐oxidation decomposition under the air atmosphere. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

大型主处理机的功能测试

本文首先分析了一台大型主处理机的系统结构.然后,介绍了适合于大型主处理机的功能测试法,并且对处理机的不同部件:运算部件、指令控制部件、存储体和存储控制部件,给出了相应的测试算法.     

真空中无源轴对称静电场与等位线的描绘

文中简要地介绍了真空中无源轴对称静电场的近轴性质，提出了描绘等位线的依据，给出了具体方法、步骤与实例，指出了其在电子光学系统定性分析中的作用。     

机载多光谱扫描仪的光谱定标

介绍了机载多光谱扫描仪光谱定标的原理、装置及实验方法,并给出了部分结果与讨论.     

Mucosal Delivery of Progestational Steroids from a Controlled Release Device: In-Vitro/In-Vivo Relationships

The mucosal delivery of progestational steroids from a model controlled release device was studied using female New Zealand White rabbits as the animal model. A controlled release device was developed which was suitable for nasal, rectal and vaginal application. The in-vitro permeation and in-vivo absorption of progesterone from the model controlled release device was investigated through the nasal, rectal and vaginal mucosa. The influence of penetrant hydrophilicity on the in-vitro permeation and in-vivo absorption from the controlled release device was also investigated using the mono-hydroxy, di-hydroxy and tri-hydroxy derivatives of progesterone. The results indicate that the nasal route demonstrates a significantly higher rate of in-vitro permeation and extent of in-vivo absorption than the rectal and vaginal mucosa. The in-vitro permeation rates and steady-state plasma concentrations achieved from the device tend to decrease with increasing penetrant hydrophilicity. A linear in-vitro/in-vivo correlation was obtained for all the mucosa studied. The slope of the relationship between the in-vitro and in-vivo data was similar for the rectal and vaginal mucosa. The results of this investigation agree with the results of a previous investigation with a solution formulation, and suggest that the hydrodynamic and/or membrane barrier properties of the nasal mucosa may from that of the rectal and vaginal mucosa.