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Bipyridyl and 1,10-phenanthroline (L3), Cl3SnCH2CH2COORo L (L= L1, a; L2, b; L3, c), formed by low-heating solid-state reaction. The crystal structures of 1 and 2 show that the tin atom adopts a distorted trigonal bipyramid geometry via intramolecular carbonyl oxygen to tin coordination [the distances of Sn-0 bond are 0.2351(6) ran for 1 and 0.2362(3) nm for 2]. Compound 1 belongs to monoclinic with space group P2/c, a = 0.9842(2) nm, b =1. 0923(8) nm, c = 1.23948(11) nm,/?= 93.894(15)°, V= 1.3294(4) ran3, Mr = 366.23, 7 = 4. Compound2 belongs to monoclinic with space group P2{/c, a = 1.04443(9) nm, b = 1.04823(7) nm, c = 1.28113(9) nm,/= 90. 953(8)°, V= 1.40239(19) nm3, Mr = 380.25, Z = 4
利用元素分析、红外光谱、核磁共振对其结构进行了表征,并通过X射线单晶衍射测定了1和2的晶体结构,二者均为具有分子内羰基氧原子配位的畸变三角双锥结构。1属于单斜品系,空间群P21/c, a=0.9842(2)nm,b=1.0923(8)nm,c=1.23948(11)nm,β=93.894(15)°,V=1.3294(4) nm^3,Mr=366.23,Z=4.2属于单斜晶系,空间群P21/c,a=1.04443(9)nm,b=1.04823 (7)nm,c=1.28113(9)nm,β=90.953(8)°,V=1.40239(19)nm^3,Mr=380.25,Z=4。
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The results indicate that there is an important relationship between the substructures of butyrolactone in taiwanin A and its biological activity, we find that the enlargement of structure space at the place of methylene of piperonyl group of taiwanin A may be a way to improve its biological activity.
我们发现taiwanin A结构中的内酯﹝butyrolactone﹞与生物活性有著密切关系,另外还推测它次甲基二氧苯基﹝piperonyl group﹞上的次甲基如果能用空间上更大的官能基取代,是改进taiwanin A生物活性的一个方向。
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To explore the effects of exogenous nitrogen input on the enzyme activity of Calamagrostis angustifolia during litter decomposition in a freshwater marsh, we supplied dissolved NH4NO3 (N0:0; N1:6 g·m-2·a-1;N2:12 g·m-2·a-1) to field plots on the Sanjiang Plain and determined the enzyme activities of litter decomposition within 160 d using litter bags.
以三江平原沼泽湿地典型湿地植物小叶章枯落物为研究对象,采用分解袋法研究了不同外源氮输入(N1、 N2分别为 6 、12g·m-2·a-1)对小叶章枯落物分解过程酶活性的影响,并设置对照区(N0,0 g· m-2·a-1)进行比较。
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According to the emprical results,we draw this conclusion that there is a bi-directional casuality between A and B shares volatility in Shanghai stock market,while there is no evident and reliable Granger-casuality between A and B shares volatility in Shenzhen stock market.
本文利用时间序列分析中的格兰杰因果关系检验法对中国证券市场A、B股的波动性进行分析,发现上海市场A、B股的波动间存在双向因果关系,而深圳市场A、B股的波动间则不存在显著可信的因果关系。
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AT-deficient plasma had significantly smaller R values compared with control, and dilution did not change R values in AT-deficient plasma. Celite activation eliminated dilution-associated changes in R values in control plasma but resulted in linear decreases R(2 = 0.88-0.96, P 0.0001 in alpha, A, and G in response to dilution.
结果显示对照组稀释后R、A、G值均明显下降,a值没有改变,而AT缺乏组与相应对照组相比R值明显降低,但稀释对其R并没有影响,硅藻土激活后使对照组中稀释造成R值下降的效果被消除,但使a、A、G值随稀释程度呈线性下降。
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The results showed that the contents of chlorophyll a and chlorophyll b decreased,and contents of pheophytin a and pheophytin b increased, but chlorophyllide a and chlorophyllide b changed slightly.
结果表明,随着加工过程的推进,叶绿素a、叶绿素b呈下降趋势,脱镁叶绿素a、脱镁叶绿素b呈上升趋势,叶绿素酸酯a、叶绿素酸酯b变化较小。
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At three months, the latency and wave amplitude of regenerating nerve were 2.74 0.49msx 19.02 2.32mv respectivly in group A, and 2.32 0.46ms, 21.04 1.09mv respectively in group B, there was no statistical difference in both groups, no regenerating nerves were found to bridge the gaps and cicatrices formed, the results could not be acquired.
肌电图测量及分析术后2月电生理检测再生神经的潜伏期及波幅,A组分别为3.37±0.54ms、13.82±1.73mv,B组分别为2.82±0.49ms、17.45±1.51mv,A组低于B组(p<0.05),3个月时A组潜伏期及波幅分别为2.74±0.49ms、19.02±2.32mv,B组分别为2.32±0.46ms、21.04±1.09mv,A、B两组无显著性差异(P>0.05)。C组仅见瘢痕组织,无神经纤维再生连接缺损处,无法进行检测。3。
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By section 4(2) to (5) of the Civil Evidence Act 1972 a previous decision of a superior court on a question of foreign law (which is reported in a citable form) may be tendered as evidence of that law and will be
a 在首述的法律程序中就该问题所作的任何裁断或决定,如以可引述的形式作报导或记录,则可接纳为证据,以证明该国家或地区关乎该事宜的法律;及
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The power amplifiers,class A and AB,using power backoff scheme are difficult to meet the effiency requirement under the condiction of a high PAR,which cause a huge energy dissipation while producing a lot of heat.
以功率回退设计的A类或AB类功率放大器难以满足在高峰均比条件下的效率要求,造成了能量的巨大浪费,而且导致了严重的基站或直放站热管理问题,影响了系统性能,增加了制作成本。
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Exploratory factor analysis, confirmative factor analysis, and analysis of variance were used to analyze the datum, which was based on the investigation we carried out for three times in Bank A, and there were more than 700 people involved. Whats more, we tested the reliability and validity of the scale thoroughly, and we established a four-factor-model for Bank A in the background of Chinese culture.
基于前后三次在A银行共计700余人次的问卷调查,对采集的数据进行了探索性因素分析、验证性因素分析、方差分析等,并对研究结果的可靠性和有效性进行了全面的检验,建立了A银行员工岗位角色适应的四因素模型。
- 相关中文对照歌词
- What A Night, What A Moon, What A Girl
- A Spindle, A Darkness, A Fever, And A Necklace
- A Hatchet, A Hammer, A Bucket Of Nails
- S.A.N.T.A.N.A.
- A Man. A Plan. A Canal. Panama.
- A Quién Vas A Amar Más Que A Mí
- Touch A Touch A Touch A Touch Me
- A Star, A Jewel, And A Hoax
- S.A.N.T.A.N.A.
- A Woman, A Lover, A Friend
- 推荐网络例句
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Do you know, i need you to come back
你知道吗,我需要你回来
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Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.
1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。
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Chapter Three: Type classification of DE structure in Sino-Tibetan languages.
第三章汉藏语&的&字结构的类型划分。