紫外线辐照血液输液加常规治疗老年急性脑卒中30例疗效观察

我院自１９８８年７月￣１９９３年１０月，应用本院研制的ＹＸ－Ａ型管式血流光量子治疗机治疗急性脑血管病３０例，均系首次发病，进行紫外线辐照血液输液加常规治疗，取得明显疗效，总有效率为９０％，我们认为紫外线辐照血液输注治疗急性脑卒中，疗效肯定且方法简便易行，是现时防治脑血管病极有希望的辅助疗法之一，值得推荐。     

Effect of Zn Interstitials on Enhancing Ultraviolet Emission of ZnO Films Deposited by MOCVD

ZnO films are grown on Si （111） substrates by a metal organic chemical vapor deposition method. Samples with different stoichiometric composition of Zn and 0 are obtained by varying Ⅱ/Ⅵ molar ratio between 3 and 1/3 in precursors. The x-ray photoelectron spectroscopy and photoluminescenee results show that the ultraviolet emission enhances with the increasing Zn/O composition ratio of the samples. It is suggested that the supertfluous Zn atoms pile up at interstitial positions to form Zn interstitial defects. The radiated recombination of the coupling of free exeitons with donor Zn interstitial enhances the ultraviolet emission of the samples.     

Luminescence Properties of Sr2SnO4：Sm^3＋ Afterglow Phosphor

A new long-lasting phosphorescence （LLP） phosphor, Sr2SnO4：Sm3＋ which emits reddish-orange LLP upon UV-excitation, is prepared by a conventional high-temperature solid-state method. After irradiation under 247-nm UV light, Sr2SnO4：Sm3＋ emits an intense reddish-orange emission afterglow from the 4G5/2 to 6HJ （J = 5/2,7/2,9/2） transitions. The afterglow decay curve of the Sm3＋-doped Sr2SnO4 phosphor contains a fast decay component and another slow decay one. Due to the presence of the slow decay component, the afterglow can be seen with the naked eye in the dark clearly for more than 1 h after removal of the excitation source.     

物理环境对人发结构特性的影响研究

研究了电吹风、紫外线照射等物理环境对人发形态结构、直径、断裂力的影响。结果表明,电吹风的吹干和紫外线长时间的照射均会对头发造成一定程度的损伤。     

重离子束12C6+累进辐照诱变柠檬酸菌株选育研究

应用大剂量重离子束12C6+ 对菌株H3001 进行二次辐照选育,对初选获得的高产柠檬酸菌株进行摇瓶发酵试验及10~ 100 L 中试发酵罐试验,采用酸碱中和法测定发酵液中柠檬酸的含量。结果表明:当二次重离子12C6+剂量为857.8 Gy 时,致死率和正突变率达到最大值,分别为94.5% 和8%。通过摇瓶发酵试验,最终获得一株高产柠檬酸菌株hw317,控制该菌株发酵周期为60 h,柠檬酸酸度能达到19.2±0.2%。Heavy 12C6+ ion beams in various high doses were employed to irradiate H3001 strain for screening Aspergillus niger strain for hyper citric acid production. Three high-yield strains were obtained after shaker fermentation test. Among the three strains, the strain hw317 was implemented shaker fermentation for stability test and 10~100 L pilot fermentation tank for citric acid productive maximization. Acid-base neutralization method was applied to determinate the content of citric acid in fermented liquid. The results showed that: when the secondary heavy ion 12C6+ dose was 857.8 Gy, both of the fatality rate (94.5%) and the positive mutation rate (8%) were highest. Through the shaker fermentation tests and 10 ~ 100 L pilot fermentation test, one strain hw317 was screened and obtained for hyper citric acid production. Consequently, the final citric acid acidity can reach up to 19.2±0.2% with controlling fermentation cycle for 60 h.     

紫外线在水处理中的应用

紫外线消毒技术用于饮用水消毒有着较大的优越性,并应用于许多行业的水消毒,是一种具有发展潜力的现代消毒技术。     

现代分析仪器在高中化学教学中的应用*——以“防晒霜的防晒效果实验探究”为例

从高中化学原子、分子等抽象性的知识教学出发,以防晒霜的防晒效果实验探究为例,探讨了现代分析仪器在高中化学教学中的应用。通过利用现代分析仪器紫外可见分光光度计,结合紫外线变色球实验探究防晒霜的防晒效果,分析并认识防晒霜中化学防晒的机理。结果表明,防晒霜的厚度越大、SPF越高,防晒霜的防晒效果越好,并且防晒霜的防晒效果可以持续一段时间,但是不同类型的防晒产品存在一定差异。在化学教学中渗透现代分析仪器的应用,为学生进一步了解化学学科在改变学习方式、拓宽学科知识领域、推动自身全面与可持续发展方面打下坚实的基础。     

提取马铃薯渣果胶啤酒酵母的诱变育种

本实验用实验室保存的啤酒酵母菌种为出发菌种,进行紫外线和超声波进行复合诱变,以提高马铃薯渣果胶的提取率。经过实验,获得最优诱变条件:紫外灯功率20W,照射距离25cm,照射时间75s时为最佳诱变时间;超声功率500W,超声频率25Hz,超声时间60min为诱变最佳条件。经过诱变,菌种的果胶提取率提高了6.83%,大大提高了生产能力。