查询词典 n-heneicosane

The comparison was made of amplitudes of the postsynaptic potential evoked in AP cells by the stimulation of T, P and N cells. The results showed that for each type of T, P and N cell the contralateral member of the pair evoked larger synaptic potentials in the AP cell that did its ipsilateral homologue and the T, P and N cell with a dorsally situated receptive field produced a larger synaptic input on the AP cell that its counterpart with a ventrally situated receptive field.

分别比较T、P和N细胞在AP细胞上引起的突触后电位的幅度，可见对侧T、P和N细胞在AP细胞上引起的突触后电位幅度比同侧的T、P和N细胞在AP细胞上引起的突触后电位幅度大；具有背部感受野的T、P和N细胞在AP细胞上引起的突触后电位的幅度比具有腹部感受野的T、P和N细胞在AP细胞上引起的突触后电位的幅度大。

In this paper, eleven benzothiazole derivatives such as N, N, N′, N′-tetra (2-benzothiazolyl) methyl-1, 2-ethanediamine,(2-benzothiazolyl) methyloxy benzene, 2,4-dichloro( 2-benzothiazolyl) methyloxy benzene, O-di(2-benzothiazolyl) methyloxybenzene, P-di(2-benzothiazolyl) methyloxy benzene, 3-(2-benzothiazolyl) pyridine were synthesized by means of conventional method or MWI technology and a single crystal of di (2-benzothiazolyl ) methyl ether was obtained.

本文分别用常规合成法和微波辐射法合成了N，N，N′， N′-四(2-苯并噻唑基)甲基-1，2-乙二胺、(2-苯并噻唑基)甲氧基苯、2，4-二氯-(2-苯并噻唑基)甲氧基苯、邻-二(2-苯并噻唑基)甲氧基苯、对-二(2-苯并噻唑基)甲氧基苯、3-(2-苯并噻唑基)吡啶等11 个苯并噻唑类化合物并得到二(2-苯并噻唑基)甲基醚单晶。

The best operational parameters were that the reaction temperature was 105℃, the reaction time was 3 hours, the mixture ratio of n: n=1:2.79, using N,N-dimethyl benzylamine as catalyst, and 2,6-Di-tert-buthyl-p-cresol as inhibitor.

结果表明，合成TGICA的最优化条件为：n/n=l：2.79；催化剂为N，N－二甲基苯胺；阻聚剂为2，6－二叔丁基对甲酚；反应温度(105±2)℃；反应时间3h。丙烯酸的转化率可达到99.7%。

N,N′-Disubstituted ureas,used as intermediates for synthesis of pesticides,resin precursors and carbamates,were synthesized from carbon dioxide and primary amines(namely n-propylamine,n-butylamine,n-amylamine,n-hexylamine,benzylamine and aniline) over organic base catalysts.

以有机碱为催化剂，CO2与伯胺反应合成了N，N′-二取代脲；考察了有机碱种类、伯胺碳链长度、反应温度、CO2压力、反应时间、催化剂用量对合成反应的影响。

Next HOMO or HOMO-1 for the radical cations calculated by the ab initio 3-21+G^* method, and the atom-pair interaction energy determined by NMDO calculation, it is shown that when n is equal to or largey than 3 in the bridge chain (CH2)n for bicyclo diamine radical cations, the bridgehead nitrogen atoms form a weak N, N'-three-electron σ-bond through space.

通过比较这些阳离子几何构型，HOMO和NHOMO(即NextHOMO和HOMO-1)，和由MNDO计算确定的原子对作用能，表明当二氮双环游离基阳离子的桥链(CH2)n的n≥3时，桥头氮原子通过空间相互用用形成了一个弱的N，N'-三电子σ键。

The crystal structures of two complexes have been determined by X-ray diffraction as: complex (11) is distorted octahedron configuration,α=15. 9002 (6), b=16. 2413 (5), c=23. 4401 (8)〓,β=90°, V=6053. 2 (4)〓, Z=8 and R=0.0531; complex (8) is trigonal bipyramidal configuration,α=9. 3476 (8), b=17. 4236 (13), c=9. 7836 (8)〓,β=91. 197 (3)°, V=1593. 1 (2)〓, Z=2 and R=0.0325, which shows that three secondary amine groups (N-1, N-2, N-3) of the glycosylamine ligand forms the equatorial plane, and the tertiary amine (N-4) and one Cl〓 are pointed on the apical positions.

分别对其进行X-ray衍射分析可以得出：配合物(11)的晶体数据为α=15.9002(6)，b=16.2413(5)，c=23.4401(8)〓，β=90°，V=6053.2(4)〓，Z=8 and R=0.0531，为畸变的八面体构型，而配合物(8)中，α=9.3476(8)，b=17.4236(13)，c=9.7836(8)〓，β=91.197(3)°，V=1593.1(2)〓，Z=2 andR=0.0325，为三角双锥构型，糖胺配体的三个氮原子（N-1，N-2，N-3）位于赤道平面上，而另外一个氮原子（N-4）和一个Cl〓位于轴向上。

Puyang City, Henan Province The largest professional pyrrolidone series products suppliers --- Puyang Guangming Chemical Co., Ltd., the company now has 12,000 tons / annual production capacity of -butyrolactone, 8000 tons N-methyl pyrrolidone and 2,000 tons of N-ethyl pyrrolidone joint installations, with domestic leading production scale and technology, product quality to meet international standards for similar products, product purity, moisture better than the imports of similar products, is currently the cutting edge of technology, quality, optimal , the lowest cost, the largest N-methyl pyrrolidone and N-ethyl pyrrolidone high-tech enterprises.

河南省濮阳市最大的专业吡咯烷酮系列产品供应商－－－濮阳市光明化工有限公司，公司现拥有12000吨/年产γ-丁内酯、8000吨N-甲基吡咯烷酮和2000吨N-乙基吡咯烷酮的联合装置，具有国内领先的生产规模和技术，产品质量达到国际同类产品标准，产品纯度、水分优于进口同类产品，是目前国内技术前沿、质量最优、成本最低、规模最大的N-甲基吡咯烷酮和N-乙基吡咯烷酮高新技术企业。

The optimum conditions for preparing TiO_2 are as follows, pH value=1, n(C_2H_5OH)/n(TiBuO_4)=15, n(H_2O)/n(TiBuO_4)=3, calefactive speed 10℃/min, sinter temperature 450℃.

3制备高光催化活性的TiO_2的最佳工艺条件为：pH=1，n(C_2H_5OH)／n(TiBuO_4)=15，n(H_2O)／n(TiBuO_4)=3，升温速率10℃／min，烧结温度为450℃。

Copolymerize methacrylic acid 3(4′-N,N-dimethylamino) ketone xanthate and acrylamide were copolymerized with N,N-methylene bisacrylamide,and then combined with silane ethylene group in the form of covalent bond on the quartz glass shee t to be made into a sensor,to determine ethanol.

将甲基丙烯酸3-(4′-N，N-二甲氨基)黄酮酯和丙烯酰胺、N，N′-亚甲基双丙烯酰胺共聚并共价键合在硅烷化的含乙烯基团的石英玻片上，制成了可测定乙醇的传感器。

N,N'-ethylenediamine diacetic acid was prepared by condensation of ethylenediamine, formaldehyde and potassium cyanide. Then 2-oxo-1-piperazine acetic acid was prepared from N,N'-ethylenediamine diacetic acid. In addition, 2-oxo-1, 4-piperazine diacetic acid(3-KP) was prepared from 2-oxo-1-piperazine acetic acid with chloroacetic acid.

本文用乙二胺、甲醛和氰化钾合成了N，N′—乙二胺二乙酸，然后由N，N′—乙二胺二乙酸合成了2—氧—1—哌嗪乙酸，再由2—氧—1—哌嗪乙酸和氯乙酸合成了2—氧—1，4—哌嗪二乙酸(3-KP)。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失