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To our surprise we achieved the ligand 9, 11 and 29 with coordinating atoms fixing at benzylic and benzene ring positions, whose structure is unique in the planar chiral cyclophane chemistry.

以钯催化的烯丙基取代反应对配体进行了考察,硫醚或硒醚取代基在苄位取代的配体表现出更高的反应活性和更高的对映选择性,配体9和11均给出最高为94%的ee值。

The species diversity of Dipentodon sinicus communities in Yushe National Forest Park of Guizhou province was studied based on the quadrate method. The results showed that Rosaceae, Ericaceae, Betulaceae, Fagaceae, Theaceae, Lauraceae, Caprifoliaceae, Cornaceae were the dominant families in D. sinicus communities of Yushe National Forest Park. In the 10 sample plots, there were 8 which were absolutely dominated with D. sinicus population, the importance value came up to 135.69 on average, and it was far higher than the others. For D. sinicus communities, the abundance index (2.847), Simpson index (0.601), Shannon-Wiener index (1.523), probability of inter-specific encounter (0.601) and species evenness (0.569) of the tree layer were lower than those of the shrub layer (5.580, 0.830, 2.377, 0.829, 0.672, respectively) on the whole. It markedly showed a species diversity characteristic of the mixed broadleaved evergreen and deciduous forest in middle subtropics. In the 10 sample plots, the species diversity level of Q1 was the highest, followed by Q3, Q5 and Q6 was the lowest.

摘要运用样方法对贵州省玉舍国家级森林公园稀有保护植物十齿花群落的物种多样性进行了研究,结果表明:玉舍国家级森林公园十齿花群落以蔷薇科、杜鹃花科、壳斗科、桦木科、山茶科、樟科、忍冬科、山茱萸科等为优势科;10个样地中有8个样地以十齿花种群占绝对优势,其平均重要值高达135.69,远远高于其它种群;十齿花群落乔木层物种丰富度为2.847、Simpson指数为0.601、Shannon-Wiener指数为1.523、种间相遇机率为0.601、均匀度指数为0.569,总体上均小于灌木层(分别为:5.580、0.830、2.377、0.829、0.672),表现为较明显的亚热带常绿落叶阔叶混交林的物种多样性特征。10个样地中,Q1的物种多样性程度最高,Q3次之,Q5和Q6最小,多样性程度最低,10个样地的物种多样性排序为Q1>Q3>Q9>Q7>Q2>Q4>Q10>Q8>Q5>Q6。

Secondary pollinators are diurnal hawk moths and butterflies. Bombus briviceps and Bombus sp. are nectar gatherers. The mean nectar sugar concentration is 29.5%. The proport ion of seed is 86. 5%. Percentage seed germination under controlled conditions is 23.1 %. Distances that seeds are ejected ranged from 0.58-1.17 m. The distances that pollen spread is 29cm. Pollen viability is highest on the day of anthesis and thereafter decreased.

匍匐凤仙花的主要传粉者是蜜蜂和熊蜂,次要传粉者为白天活动的天蛾和蝴蝶,另外还有两种花蜜窃取者;花蜜糖平均浓度为29.5%;种子产生率为86.5%,种子萌发率为23.1%,种子散布距离为0.58-1.17m;花粉流为29cm;花粉活力在第一天最高,第二天次之,第三天显著减弱;P/O值为

The mix- sowing treatment A (50% alfalfa+50 % smooth brome grass) could get best effect, with lowest pH value and NH3-N/TN content and highest lactic acid and comprehensive score.

结论]以混播处理A(苜蓿50%+无芒雀麦50%)效果最好,pH值,NH3-N/TN含量最低,乳酸含量和综合评分最高。

The plant important value of Simpson and Shannon wiener in Jing zhou ancient wall are measured and illustrated. The important value of herb and liana and other relevant data are measured and illustrated. Pterocanfa stenoplera, Broussonetia,Papyrifera, Corydalis, Rabia,etc are selected.

测定了荆州古城墙植被中乔木的Simpson多样性指数值和Shannon-wiener多样性指数值,测定了草本与藤本等植物的重要值及其他相关数据,并得出B样方的植物多样性数值最高、I点的植物多样性数值最低等结论,筛选出枫杨、井栏边草、土牛膝、紫堇、薏苡等乡土植物。

It is concluded that the main influence factors on the micro-hardness of the nickel deposit are sulphamate concentration and electrolyte temperature. The most hard nickel deposit layer was obtained with sulphamate concentration 700g/L, cathodal current density 5A/dm2, pulse current frequency 800Hz, pulse current duty cycle 0.6, electrolyte pH value 4.0, electrolyte temperature 70℃.

试验结果表明:主盐浓度和镀液温度是影响镀层硬度的显著因素;当主盐氨基磺酸镍的浓度为700g/L,阴极电流密度为5A/dm2,脉冲频率为800Hz,占空比为0.6,镀液pH值取4.0,镀液温度为70℃时,可以制得显微硬度最高的镍镀层。

Results 155 patients had surgical site infections in total 1 589 patients undergoing general surgery and the infection rate was 9.75%. The infection rates were hightest in those undergoing celiotomy or colon surgery. 56 patients appeared with postdischarge surgical site infection, accounting for 36.13% in the whole infection public. Most postdischarge surgical site infection happened in class Ⅰ and class Ⅱ surgery. Albumin and hemoglobin abnormity, emergency surgery, bleeding, incision type and eduction were risk factors of surgical site infection by multivariate Logistic regression analysis.

结果 1 589例次手术患者中,155例次手术部位发生感染,感染率为9.75%;不同手术类别相同危险指数的手术以剖腹探查手术和结肠手术感染发生最高;有56例患者在出院后发生手术部位感染,随访感染占总感染例数的36.13%,随访感染以Ⅰ、Ⅱ类手术为主;经单因素及多因素Logistic回归分析得出,白蛋白及血红蛋白值异常、急诊手术、失血、切口类型、引流为手术部位感染的危险因素。

Lindera glauca, Castanea seguinii, Celtis sinensis took up predominant positions, their importance values were 36.82, 31.09, 24.13 respectively.

该区群落以山胡椒、茅栗和朴树重要值最高,分别为36.82、31.09、24.13。

Priority PAHs recommended by USEPA were all detected, and the mass concentrations of individual PAHs was between 1.49 and 87.43ngg^(-1), The PAHs with low molecular weight, such as Nap, Flu, Ace were observed in relatively low mass concentrations. The PAHs with high molecular weight, such as Chrysene, Indeno [1, 2, 3-cd] pyrene, Benzo perylene were relatively abundant and the mass congcentration of BghiP was the highest. The total mass congcentration of 16 PAHs exceeded standard of Holand from 10 to 40 times, and in middle pollution level comparatively with other districts.

美国环保总署推荐优先控制的16种多环芳烃均被检出,多环芳烃单体的质量浓度在1.49~87.43ngg^(-1)扩之间;其中萘、药、苊等低分子量芳烃的质量浓度相对较低;窟、茚并[1, 2, 3-cd]苝、苯并苝等高分子量芳烃的质量浓度相对较高,苯并苝的质量浓度最高。16种多环芳烃的质量总浓度超过荷兰政府规定无污染土壤PAHs值的10~40倍;与国内外其他地区相比较,多环芳烃污染处于中等水平。

But the activity of RUBICO of Cryptocarya was the highest in l-hour sunshine a day. Middle and late successionals grew better in 1-hour sunshine a day habitat, except Pinus seedlings.

马尾松和荷木的RuBP羧化酶活性随着生长环境的光强度的增加,其活性有所增加;但黄果厚壳桂的相应值是在每日直照光1h的光环境中最高。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。