查询词典 n-tetracosane

The process does not depends on catalytic hydrogenization method, has simple reaction condition, high reactant yield all over 75%, can use TLC to track the whole reaction process, and is more suitable to the transformation of function group in the organic synthesis field as the result of N-Boc or N-Cbz derivative is easy to loss protective reaction, which has spreading application prospect.

该方法不依赖于催化氢化方法，反应条件简单，反应产物产率高，均在75％以上，反应过程可用TLC进行跟踪，且由于N-Boc或N-Cbz衍生物更易发生去保护反应，在有机合成领域更适宜于官能团的转化，具有广阔的应用前景。

Microbial biomass in soil profile showed negative relation with soil pH value and bulk density, while positive correlation with contents of soil organic carbon, light fraction and particulate organic carbon and fine root biomass were found. There were no significant difference between soil microbial biomass and DOC, total N, total P, hydrolyzable N and available P.

土壤微生物生物量垂直分布与土壤pH和容重呈负相关，与土壤的有机碳、轻组有机碳和颗粒有机碳含量及细根生物量呈显著的正相关，但与土壤可溶性有机C和全N、全P、水解性N和速效P含量的相关性不显著。

Methods An isovolumic Langendorff perfused rat heart model was used.After 30 minutes of equilibrating perfusion,the HSPT group(n=8) was preconditioned by 15 minutes of hyperthermic oxygenated cardioplegia at 42℃(Control,n=8,at 37℃),before 100 minutes of cold preservation,followed by 30 minutes of reperfusion.

Wistar大鼠16只，随机分为HSPT组（n=8）和对照组（n=8），建立Langendorff离体鼠心等容收缩模型；平衡灌流30分钟后，分别用42 ℃和37 ℃的含氧停搏液灌注15分钟，然后冷停搏100分钟，再灌30分钟。

Based on Hutchinson niche and Guangxia Cao\'s definition, Fuzzy hypervolume niche evolves the theory of fuzzy niche: the niche is a fuzzy hypervolume; the niche of the species is a hypervolume with fuzzy boundary which is formed by the n-dimensional resources (time, space, temperature, humid, trophic,...) necessary for the species\' continuous existing and multiplying; membership of a point in the niche is equivalent to the adaptive degree of the species to the point of the environmental resources.

在Hutchinson生态位和Guangxia Cao的定义的基础上，模糊超体积生态位发展了模糊生态位理论：物种的生态位是可以使物种生存和不断繁殖的n维环境变量(时间、空间、温度、湿度、营养……)所形成的边界模糊的一个n维超体积；隶属函数表明n维资源空间的一个点x属于生态位的程度，也表明物种对环境资源的适应程度。

A type of novel dis-substituted α-arylglycine derivatives was synthesized in high yields and high regioselectivity via the stepwise Friedel-Crafts reaction of phenols with N-tosyl imino ester promoted by TiCl〓.

发现在Mg／MeOH／超声波条件下，能高产率的得到N-Tos裂解后N-Boc保护的α-芳香甘氨酸衍生物，实现了一条简单、实用的合成N-Boc保护的α-芳香甘氨酸衍生物的方法。

In addition, ioding was found to be an efficient catalyst for the imino Diels-Alder reaction of N-arylimine and enol ethers and the reaction provided tertrahydroqinolines in good yields. One pot synthesis of tetrahydroqinolines from aldehyde, aniline and enol ethers was also achieved using iodine as the catalyst. The chemical yield of the"one pot"reaction was comparable with that obtained using preformed N-arylimine.

此外我们也发现碘能够有效地催化N-芳基亚胺与烯醇醚的Diels-Alder反应，以很高的化学收率得到了四氢喹啉衍生物，并且发现碘也能够直接催化芳香醛、苯胺、烯醇醚的三组分&一锅&反应，获得的化学产率与使用预制的N-芳基亚胺相当。

The total of these two sorts of functions is called S-functions The indicial function, sinusoidal function, cosinusoidal function, hyperbolic sinusoidal function, hyperbolic cosinusoidal function, trigonometric function of n-order and hyperbolic function of n-order etch are all belong to S-functions.

指数函数、正弦函数、余弦函数、双曲正弦、双曲余弦、n阶三角函数和n阶双曲函数等。都是S－函数的特殊形式。文中证明了关于S－函数及其各阶导数的性质的三个定理。

Methods Twelve rabbits fed with high-cholesterol diet for 8 weeks wererandomly divided into two groups:(1) high cholesterol group (n=6):maintained on high cholesterol diet for 6 weeks;(2) niacin group (n=6):the same cholesterol diet plus niacin 200mg·kg~(-1·d~(-1) for 6 weeks. Controlgroup (n=6) was fed with normal diet for 14 weeks. Subcutaneousadipose was collected from inguen for RNA analysis. Leptin and MCP-1levels in serum and adipocytes culture supernatant were measured byELISA.

选取12只健康雄性新西兰兔给予高胆固醇饲料培养8周，建立高胆固醇兔模型后，随机分为：(1)高胆固醇组：继续饲以高胆固醇饲料6周；(2)烟酸治疗组：在饲以高胆固醇饲料的基础上给予烟酸缓释剂0.2g.kg~(-1)。d~(-1)，共6周；另选普通饮食14周雄性新西兰兔(n=6)作为对照组。

Methods: the present study improved isolation of LDL, undertook one-step of density gradient centrifugation, generate E-LDL by treatment LDL with multiple enzymes, direct fluorescent label CRP and LDL, and investigate whether CRP play as intermedial mediator in atherosclerosis. Experiment consists of 8 groups: control group, N-LDL group, ox-LDL group, E-LDL group, CRP+N-LDL group, CRP+ox-LDL group, CRP+E-LDL group.

本研究参考文献改进LDL提取方法，通过一次性密度梯度超速离心，分离LDL，并且通过复合酶处理以及铜离子氧化法分别生成E-LDL和ox-LDL，并直接对CRP及LDL进行荧光标记，通过与内皮细胞共孵育，利用荧光显微镜检测CRP及LDL与内皮细胞结合，实验分为8组：空白对照组、CRP组、N-LDL组、ox-LDL组、E-LDL组、CRP+N-LDL组、CRP+ox-LDL组、CRP+E-LDL组。

After model reproducing, the rabbits were randomized to receive a directly intramyocardial injection of either pcDNA3-bFGF 100μg (n=19) or pcDNA3 100μg (n=18). Animals were sacrificed 2, 6 or 12 weeks later, immunohistochemistry analysis was performed to study expression of bFGF gene at protein level, histologic analysis was performed to evaluate the effect of angiogenesis induced by gene therapy.

模型制备成功后将动物分为治疗组(n=19)和对照组(n=18)，并于心肌内分别注射pcDNA3-bFGF100μg或pcDNA3 100μg，饲养至2、6、12周处死；免疫组化观察蛋白表达；行病理切片观察缺血坏死心肌面积的变化和缺血心肌内血管新生的情况。

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。