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In this paper, acetanilide used as start material was chlorosulfonated, then reacted with alkylamines with different length of carbon chain to prepare 4 p-acetylaminophenylsulfonylalkylamine.

本文以乙酰苯胺为起始原料，经氯磺化后分别和不同碳链的正烷基胺反应制得4种不同碳链长度的对乙酰氨基苯磺酰烷基胺，将其水解后制得了对氨基苯磺酰正丁胺、对氨基苯磺酰正辛胺、对氨基苯磺酰正十二胺和对氨基苯磺酰正十八胺。

Its results showed that ratio of length to width of petal and sepal and the degree of flat of achene within population were characterized as the most stable characters and gradually increased with the increase of latitude.

结果表明，居群内，瘦果扁平度、花瓣长宽比、萼片长宽比变异最为稳定，居群间，这3个繁殖器官的相对性状呈现随着纬度的增加逐渐增大的趋势，并且随纬度的增加，核型不对称系数呈现不断增加而染色体总长不断减小的趋势。

The diets of test group 1, 2 and control group included in 0.5% enzymatic casein (small peptides above 80% and average length of peptides is 2.98), 0.5% acidify hydrolyzed casein(free amino acids above 80%) and 0.5% casein.

试验期56天。结果表明：添加O.5％酶解酪蛋白组草鱼其相对生长率、净蛋白沉积率、饲料系数和血浆中镁含量与小肽总量均显著高于添加0.5％酪蛋白组和0.5％酸解酪蛋白组(p＜0.05)。

Very good length in the mouth, well balanced, rich , slightly acidulous.

在口中流向的时间很长，均衡性好，饱满，略带酸味。

On his back was a sack of acorn. In his hand was a four-foot length of iron pipe.

他背着一大袋橡子，手里拿着一根4英尺长的铁管。

In experiments, pressure ratio and acoustic power have been enhanced by increasing heating power and the length of acoustic pressure amplifier.

在实验研究中，通过增加声压放大器长度和加热功率，提高压比和声功。

The part of vertical incision from acromion to lower end of the incision can′t go beyond(6.19±0.49)cm that is to say the vertical operative incision can′t go beyond the upper 2/5 of the length of the deltoid muscle.

纵行切口，从肩峰向下不超过(6.19±0.49)cm，也就是说此纵切口不超过三角肌中线长度的上2/5。

Results: The anterolateral length of the origin of the deltoid muscle is (8.73±0.64) cm, the distance between the acromion and the deltoidtuberosity is(15.49± 1.57) cm.

结果：三角肌前外侧部起点长度为(8.73±0.64)cm，三角肌肩峰外侧端起点至三角肌粗隆长(15.49±1.57)cm。

The point where the anterior branch of axillary nerve crosses the line junction the acromion to the deltoid tuberosity lies below the acromion (6.19±0.49) cm, and it corresponds to the junction of upper 2/5 and lower 3/5 of the length of the deltoid muscle.

腋神经前支于肩峰外侧端与三角肌止点连线相交点位于肩峰下(6.19±0.49)cm，相当于肩峰与三角肌止点连线间三角肌长度的上2/5与下3/5交点。

Actinomycin D and tunicamycin inhibited pollen germination in the first hour,however,no reduction of the tube length was observed later.

Linskens(1970)等「SJ和Franki(1980)等【3〕证明成熟花粉中存在体外翻译活性的多核糖体及贮藏mRNA。

Finally it offers the analysis of the fault-tolerance system as well as its test verification.

这样，运行于空间环境中的系统的设计目标就是在保证系统实时性

However, it is still difficult to find out the real reason of the increase of the keratinized gingiva during the orthodontic extrusion whether it is due to the proliferation of the gingival tissue or to its elastic nature, that is because the proliferation of the fibroblasts as well as the connective tissue changes in volume and the intra-fibers spaces were all immeasurable in most of the studies.

然而，仍然难以找到真正的原因增加的角化牙龈在正畸挤压它是否是由于扩散的牙龈组织或其弹性性质，这是因为增殖的成纤维细胞以及作为结缔组织的变化量和内部纤维空格都是不可估量的，大多数的研究。