查询词典 n-tetracosane

Polyethylene glycol ethers of alkyl alcohols having the general formula CH3(CH2)xCH2(OCH2CH2)nOH wherein x is 8 to 20 (of which ceteareth-20, steareth-20 and steareth-100 are preferred), poloxamer 185, poloxamer 407, N,N-dimethyl dodecylamine N-oxide, and mixtures thereof, are employed to increase follicular delivery and/or follicular residence time of certain water soluble ornithine decarboxylase inhibitors of which 2-2,5-diamino pentanoic acid and its pharmaceutically acceptable salts, hydrates, optical enantiomers and racemic mixture are preferred.

使用通式为CH3(CH2)xCH2(OCH2CH2)nOH的烷基醇的聚乙二醇醚，其中x为8-20(其中鲸蜡硬脂醇醚-20、硬脂醇醚-20和硬脂醇醚-100是优选的)、poloxamer 185、poloxamer 407、N，N-二甲基十二烷胺N-氧化物及其混合物来提高某些水溶性的鸟氨酸脱羧酶抑制剂的毛囊传输和/或毛囊停留时间，优选的抑制剂是2--2，5-二氨基戊酸及其药学上可接受的盐、水合物、光学对映异构体及外消旋混合物。

One hundred and thirty male Wistar rats were randomly divided into sham scald group (n=10), thermal injury group (n=60, 40 ml/kg normal saline was infused peritoneally 6 hours postburn), and Xuebijing treatment group (n=60, 4 ml/kg Xuebijing injection was injected twice a day in addition to delayed resuscitation).

采用大鼠30%总体表面积Ⅲ度烫伤模型。130只雄性Wistar大鼠按随机数字表法分为假伤组（n=10）、烫伤组（n=60，伤后6 h腹腔内注射40 ml/kg生理盐水）和血必净组（n=60，血必净注射液4 ml/kg，每日2次）。

To explore new synthetic methods, we set out a careful investigation of the reaction of benzimidazolium salt with many nucleophilic agents, including the active aromatic compounds and heteratom nucleophilic agents, and found that the quaternary C=N is not so active; when benzimidazolium salt is reacted with big nitrogen nucleophilic agent? phthalimide, it does not give the expected addition product, instead, produces N-alkyl phthalimide through alkyl-transfermation from benzimidazolium salt to phthalimide.

为了开发新的合成方法，研究了苯并咪唑盐与各种亲核试剂（活泼芳环与杂原子亲核试剂）的反应，发现苯并咪唑盐不与活泼芳环及杂原子亲核试剂发生2位加成反应；在与体积较大的位阻型N亲核试剂邻苯二甲酚亚胺反应时，未得到亲核试剂与极化的C＝N的加成产物，而是得到N烷基化的邻苯二甲酰亚胺，进一步研究表明，苯并咪唑盐将1（3）位N上的烷基转移给了邻苯二甲酰亚胺，并讨论了其反应机理和取代基，溶剂效应。

Total N increased significantly in the rhizosphere, hut total P and total K decreased. However, the available N, P and K in the rhizosphere behaved in an opposite way: with available N decreased but available P and available K increased in the rhizosphere except fur Phragmites communis Trin. Deficit of available N is the most significant, and accumulation of available P and available K were the least for Salsola nitraria Pall. among all seven halophytes.

在所有研究植物中，根际土壤中全N含量比土体的含量高，但全P和全K含量却比土体的含量低；根际土壤中有效态养分的变化则与全态相反，根际土壤中的有效N含量比土体中的都显著降低，除芦苇外，其他六种盐生植物根际土壤中有效P和有效K的含量都高于土体，但有效P的富集不及有效K富集的程度高。

The N gene protein was expressed in the CHO cells proved by IFA. The N gene was transcripted as proved with RT-PCR. CHO/CDV-N cell strain was constructed, which provided evidence for research of CDV serumal detection and gene vaccine.

然后通过磷酸钙共沉淀法转染CHO-K1细胞，通过潮霉素筛选得到阳性克隆，间接免疫荧光实验鉴定N基因在CHO细胞中的表达，并用RT-PCR方法从转录水平证实N基因在CHO-K1细胞中的表达，最终建立了CHO/ CDV-N细胞株，为犬瘟热病毒的血清学检测和基因疫苗的研制奠定了基础。

With diluted anaerobically pretreated wastewater from a pig farm and Spirodela oligorrhiza, TN, NH(superscript + subscript 4)-N and NO(superscript – subscript x)-N removal pathways in shallow-water duckweed-based wastewater treatment systems were studied in summer and winter.

以稀释的猪场厌氧污水为供试水样，少根紫萍为供试生物材料，对夏、冬2季浅水体浮萍污水净化系统TN、NH(上标+下标 4)-N和NO-N（NO(上标–下标 2)-N与NO(上标–下标 3)-N之和）的去除途径进行了试验研究。

With diluted anaerobically pretreated wastewater from a pig farm and Spirodela oligorrhiza,TN,NH~+_4-N and NO~-_x-N removal pathways in shallow-water duckweed-based wastewater treatment systems were studied in summer and winter.

以稀释的猪场厌氧污水为供试水样，少根紫萍为供试生物材料，对夏、冬2季浅水体浮萍污水净化系统TN、NH4+-N和NOx--N(NO2--N与NO3--N之和)的去除途径进行了试验研究。

CNTs were first pre-treated using acid solution (HNO3) to obtain CNTs functionalized with carboxylic groups. Subsequently, the stearyl alcohol was grafted onto CNT with the assistance of dehydrating agent, N,N'-dicyclohexyl-carbodiimide. Excellent dispersion in organic solvents such as acetone, THF, and chloroform was found for the modified CNTs (CNT-C18). In addition, the PBS/CNTs nanocomposites were then prepared through simple melt-blending. Mechanical properties, thermal behavior, conductivity of resultant polymer/CNT composites were investigated. The results show that excellent dispersion of nanotubes in the PBS matrices was achieved.

为了增加多壁奈米碳管在复合材料中的分散性，将碳管表面进行化学修饰，首先将多壁奈米碳管浸入HNO3溶液中，进行酸化，使碳管表面带有羧酸的官能基，然后再加入十八烷醇，在温和的条件下，藉由N，N'-二环己基碳二亚胺(N，N'-dicyclohexyl- carbodiimide，DCC)脱水剂脱水，使碳管和十八烷醇之间产生酯基的化学键结，改质后的碳管可以分散在acetone、THF、chloroform…等有机溶剂中，结果显示成功的利用DCC脱水剂完成碳管的改质。

A three-level energy model is forwarded on the nonlinear absorption properties o f a two-photon absorption dye trans-4-[4′-(N- hydroxyethyl- N-eth ylamino)styryl]-N-methylpyridinium p-toluene sulfonate.

提出了有机染料反式 4 [4′(N 羟乙基 N 乙基胺基)苯乙烯基 ] N 甲基吡啶对甲苯磺酸盐非线性吸收的三态模型。

Two new active esters of acrylic acids monomers, N-p-acryloxybenzoyloxy succini-mide and N-p-methacryloxybenzoyloxy succinimide have been synthesized and polymerized.ABOSu and MBOSu were prepared by coupling of p-acryloxybenzoic acid or p-methacryloxybenzoie acid with N-hydroxy succinimide in the presence of dicyclohexylcarbodimide.

新的丙烯酸活性酯，N-(对甲基丙烯酰氧苯甲酰氧基)丁二酰亚胺及N-丁二酰亚胺单体分别由对甲基丙烯酰氧基苯甲酸、对丙烯酰氧基苯甲酸与N-羟基丁二酰亚胺在环已基羰二亚胺存在下经偶联反应合成。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。