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Excited triplet state of [60]fullerene containing piperidinoxanthate dyad is at 690nm, which has lifetime of 23.7xs in Ar-saturated benzonitrile, whereas that ofparent C60 is at 750nm, with lifetime of 50s, indicating that excited triplet state of
富勒烯C_(60)哌啶黄原酸酯稠合体激发三线态的最大吸收峰在690nm,相对于纯C_(60)发生蓝移用532nm激光激发后,富勒烯C_(60)哌啶黄原酸酯稠合体激发三线态的最大吸收峰在690nm,相对于C_(60)的750nm发生蓝移,在氩气饱和的苯腈中寿命23.7μs,比C_(60)的55μs短,表明环加成反应连接的哌啶黄原酸酯部分具有吸电子性质。
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What we refer to as " community " is "individual organization" and "government" rather than "Gesellschaft" and "Gemeinschaft ".
"社区"是相对于"单位"和"政府"而言的,而不是相对于"社会"和"社团"而言的。
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We also get optimal competitive strategies and their competitive ratios. Compared to the results of Karp and El-Yaniv, the introduction of information of input structure lea...
相对于Karp及El-Yaniv等人的研究结果,由于引进了输入信息使得竞争比性能分析提高;相对于Fujiwara等人的研究结果,本文研究了存在利率时离散性情形,给出了问题的最优解。
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The bread-and-butter concerns of 2008 - high unemployment, job insecurity and overcrowded schools - may be very different from the more idealistic causes of May 1968. But, activists like Prevost of the UNEF student union say, young people today are as eager for change as 40 years ago.
高失业率,工作无保障以及拥挤的学校成为法国2008年最基本的问题,也许这相对于68年暴动起因有很大不同,但法国全国学生联合会中的激进分子认为人们现在对于改变的渴望程度与四十年前差不多
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Based on GC and GC-MS analyses, the geochemical characteristics of these typical deep viscous oils are listed as follows:(1) strong preference of even n-alkanes over odd n-alkanes;(2) strong preference of phytane over pristane, i. e. Pr/Ph ratio<<1;(3) high abundance of gammacerane relative to C〓hopanes;(4) much more amounts of C〓 pentakishomohopanes than C〓 tetrakishomohopanes and even C〓 trishomohopanes.
罗家—垦西地区稠油饱和烃色谱、色谱-质谱分析结果展示:(1)正构烷烃具有明显的偶奇优势;(2)类异戊二烯烷烃具有较强的植烷优势,姥姣烷/植烷比值远小于1;(3)伽玛蜡烷相对含量(相对于C30藿烷)普遍很高;(4)C35升藿烷明显高于C34、甚至C33升藿烷;表现出膏盐湖相生物标志物的组成特征。
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Correlation analysis and factor analysis indicated that two principal components were derived with each comprising 3 variables. The first principal component include the width of metatarsal trochlea II, III and IV; and the second principal component includes the relative height and anterior projection of metatarsal trochlea II compared to that of III, and relative anterior projection of metatarsal trochlea IV compared to that of III.
对现生鸟类跗跖骨5组(12个)变量进行分析,研究各变量间的相关程度,对变量进行主成分分析提取出2个主成分,其中第1主成分包括第II,III,IV三个跖骨的宽度变量;第2主成分包括:第II跖骨滑车相对于第III跖骨滑车的上下及前后位置两变量,以及第IV跖骨滑车相对于第III跖骨滑车的前后位置变量。
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The results showed that the TiN andN films are polycrystalline phase. The properties and structure of TiN films are mainly determined by the N2 mass flow rate, and as the N2 mass flow rate increases, the structure of the TiN films transforms to f.c.c. type leading to better the properties of films. The presence of negative bias voltage can optimize the grain of TiN films, lower the defect proportion and denser the films, which improves the hardness of films. The TiN films conform to the free carrier absorption mechanism and there are many of free electrons with lower N content in TiN films. With the increase of N content, the quantity of free electrons and reflectivity of films decrease, and the plasma frequence shifts to the lower energy, which leads to the regular change of colors of films from silver, yellowy, golden to yellow-red, meanwhile the lightness of films decreases. The goldenN film consists of TiN and ZrN phase, but belongs to a sigle f.c.c. structure with (111) preferred orientation. The Zr-doping dosen't change the position of the valance band, conduction band and forbidden band ofN film, but leads to the presence of new energy levels, which is the reason thatN film remains golden. The transparent hard films with good corrosion resistance and high hardness have been prepared and the further reseachs showed that the grain size of those films is by far smaller than the wave length and the width of forbidden band of those films is very broad, is the reasons that those films are transparent.
研究表明:氮化钛和N 薄膜为多晶态,氮流量决定了氮化钛薄膜的结构和性能,增加氮流量能使氮化钛薄膜的结构向面心立方结构转变,从而得到性能良好的氮化钛薄膜;施加负偏压能优化氮化钛晶粒和减少薄膜中的缺陷,使膜层变得更致密,从而提高薄膜硬度;氮化钛主要遵循自由载流子光吸收,氮含量较少时薄膜中的自由电子数目较多,随着氮含量的增加,薄膜中的自由电子数目不断减少,反射率逐渐降低,等离子体频率向低能端移动,从而使薄膜颜色出现规律变化,由金属色银白色到淡黄、金黄再到红黄,并且薄膜亮度呈下降趋势;金黄色的N 薄膜中存在TiN 和ZrN 的分离相,但其为单一的面心立方结构并具有(111)面择优取向;相对于TiN 薄膜,Zr 掺杂后,并没有使薄膜的导带、价带和禁带发生变化,只是在TiN 禁带内增加了新能级,这也正是掺杂Zr 后,薄膜仍
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The sensitivity, specificity, PPV, and NPV of ECE for BE patients undergoing surveillance were 79%, 78%, 94%, and 44%, respectively. The sensitivity, specificity, PPV, and NPV for erosive esophagitis were 50%, 90%, 56%, and 88% and for hiatal hernia were 54%, 67%, 83%, and 33%, respectively.
腐蚀性食管炎的ECE相对于BE的灵敏度,特异性,阳性预测值以及阴性预测值分别为50%, 90%, 56%,和88%,食道裂孔疝的ECE相对于BE的灵敏度,特异性,阳性预测值以及阴性预测值分别为54%, 67%, 83%,和 33%。
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Based on an intention-to-treat analysis, patients treated with pioglitazone had a significant increase in limb fat compared with those receiving placebo (0.38 vs 0.05 kg; P =.051). No difference was found, however, in the patients treated with stavudine. After excluding these patients, the increased limb fat was even greater for the pioglitazone-treated patients (0.45 vs 0.04 kg; P =.013). Other improvements included increased thigh circumference (1.4 vs 0.2 cm; P =.017) and tricipital skin-fold thickness (0.9 mm vs 0.4 mm; P =.047). No difference was found in subcutaneous abdominal fat or visceral fat.
根据意向分析,接受pioglitazone治疗相较于接受安慰剂的病患,肢体脂肪显著地增加(0.38相较于0.05公斤;P=。051);除了使用stavudine治疗的病患外,并没有发现差异;在排除这些病患后,接受pioglitazone治疗的病患,肢体脂肪显著地增加(0.45公斤比0.04公斤;P=。013);其它变化包括大腿围增加(1.4相较于0.2公分;P=。017),以及三头肌皮肤厚度(0.9公厘相对于0.4公厘;P=。047),至于皮下脂肪或是脏器脂肪并没有差异。
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Underoptimal conditions, in toluene / dimethyl phthalate / TBP, after EAHQ was oxidizedwith 〓, then the catalyst and styrene were added, the conversion of styrene basedon EAHQ is 68%, the selectivity for styrene oxide based on styrene is 92% and theTON of the catalyst is 500; in toluene / phenyl ether / TBP, epoxidation of styrenewas performed with 〓 generated in situ, the conversion is 46%, the selectivity is94% and the product can be separated by distillation under reduced pressure.
优化条件下,甲苯/邻苯二甲酸二甲酯/TBP(2/2/1,体积比)中,EAHQ先用〓氧化完全后,再加入催化剂A和苯乙烯进行环氧化反应苯乙烯相对于EAHQ的转化率为68%,生成环氧苯乙烷的选择性为92%,催化剂A的TON达到500;甲苯/二苯醚/TBP(1/3/1,体积比)中,原位生成〓条件下苯乙烯相对于EAHQ的转化率为46%,生成环氧苯乙烷的选择性为94%,产物可通过减压蒸馏分离。
- 推荐网络例句
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Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.
在对危险的南部地区访问时,他斥责什叶派民兵领导人对中央集权的挑衅行为。
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In fact,I've got him on the satellite mobile right now.
实际上 我们已接通卫星可视电话了
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The enrich the peopling of Deng Xiaoping of century great person thought, it is the main component in system of theory of Deng Xiaoping economy, it is a when our country economy builds basic task important facet.
世纪伟人邓小平的富民思想,是邓小平经济理论体系中的重要组成部分,是我国经济建设根本任务的一个重要方面。