A combinatorial approach of developing alloy thin films using co-sputtering technique for displays

In this study we have used a combinatorial approach for producing binary and ternary alloy thin film libraries using a lab-scale RF co-sputtering system.Initially we used two elemental sputtering targets,i.e.aluminum(Al) target and neodymium(Nd) target,to produce a film library of varying composition and successfully identified a suitable composition range(1.95-2.38 at%Nd) in which resistance to hillock formation and resistivity of the film spots were found to be satisfactory in annealed state(350°C,30 min) .In another case,in order to form ternary alloy composition library we have used two sputtering targets,i.e.an Al-0.5 at%Nd alloy target and an elemental Ni target.Though,co-sputtered Al-0.6 at% Nd-0.9 at%Ni alloy films showed satisfactory resistance to hillock formation and low resistivity after annealing,film deposited from a ternary alloy target with the same composition failed to show satisfactory resistance to hillock formation during annealing.In case of Al-0.6 at%Nd-0.9 at%Ni alloy target,250 nm thick film showed poor resistance to hillock formation than the 500 nm thick film.This clearly showed thickness-dependent hillock performance of Al-0.6 at%Nd-0.9 at%Ni alloy.In this study it was found that,in addition to the process variables,metallurgical microstructure of the alloy sputtering targets had significant effect on the film properties which was not obvious from the results of films deposited using co-sputtering of the individual elemental targets.     

Homozygous mutation of AURKC yields large-headed polyploid spermatozoa and causes male infertility

The World Health Organization conservatively estimates that 80 million people suffer from infertility worldwide. Male factors are believed to be responsible for 20-50% of all infertility cases, but microdeletions of the Y chromosome are the only genetic defects altering human spermatogenesis that have been reported repeatedly. We focused our work on infertile men with a normal somatic karyotype but typical spermatozoa mainly characterized by large heads, a variable number of tails and an increased chromosomal content (OMIM 243060). We performed a genome-wide microsatellite scan on ten infertile men presenting this characteristic phenotype. In all of these men, we identified a common region of homozygosity harboring the aurora kinase C gene (AURKC) with a single nucleotide deletion in the AURKC coding sequence. In addition, we show that this founder mutation results in premature termination of translation, yielding a truncated protein that lacks the kinase domain. We conclude that the absence of AURKC causes male infertility owing to the production of large-headed multiflagellar polyploid spermatozoa.     

芦荟冷冻粉中多糖和甙和纯化、分离和鉴定

以费拉芦荟生产的 10 0∶1全叶芦荟冷冻干燥粉为材料 ,用高速逆流色谱和制备色谱从中分离出 3种芦荟多糖和 1种芦荟甙 ,并用色谱、光谱定性 .多糖纯度达到定量和鉴别用芦荟多糖对照品的要求 ,芦荟甙的纯度达w =97.93% .     

荔波小七孔岩溶植被的研究

本文通过实地调查、样方统计、标本采集等,对荔波小七孔地区岩溶植被的生境条件、区系组成、群落学特征、发展演替以及保护利用等方面进行了初步的分析研究。     

Diasteroisomeric ichthyotoxic acylglycerols from the dorsum of two geographically distinct populations ofArchidoris nudibranchs

Two marine opisthobranchs,Archidoris tuberculata from Asturias (N. Spain) andArchidoris carvi from Patagonia (S. Argentina), contain in their dorsum diasteroisomeric ichthyotoxic acylglycerols esterified in position 1-sn by antipodal diterpenoid acids.     

细水雾抑制沥青喷雾火的实验研究

通过实验研究了沥青喷雾燃烧特性以及细水雾抑制沥青喷雾火的有效性.细水雾雾场特性由LDV/APV系统测量.实验中的温度数据由热电偶测量,沥青喷雾火自由燃烧时火焰结构则由热像仪获取.实验结果显示,喷雾火燃烧时最高温度发生在火焰团内部.当压力比比较高时(pw/Pf＞2.65),细水雾对沥青喷雾火有较好的抑制熄灭作用;而当压力...     

人员应急疏散行动开始前的决策行为

对香港特区三综公屋火灾案例中的人员疏散行为进行了问卷调查·利用自适应性模糊神经网络和BP机制,将采集到的数据样本用于基于模糊推理机的网络训练和校验,建立了人员疏散行动开始前决策行为的预测模型PERM·该模型的预测结果和问卷调查的结果基本吻合·研究表明,火灾状态下,人员应急疏散行动开始前的决策行为与人员火灾经验、人员的初始状态与居住条件等因素有关·香港公屋居住人员在得到火警信息后,约占半数的人将会首先采取进一步确认火灾信息等行动,最终在10～20min以后才开始撤离·四分之一左右的人会做出立刻开始疏散行动的决策·