一步法

Poly lactic acid polymers were synthesized from lactic acid by one-step method with molecular sieve.

以乳酸为原料，采用分子筛除水的一步法本体熔融缩聚合工艺制备了聚乳酸。

Nanometer sized needle like and spherical shaped zinc oxide was prepared by using single step hydrolysis method directly,zinc chloride and sodium hydroxide as raw materials.

以氯化锌和氢氧化钠为原料，采用直接水解一步法制备了针状和球形纳米氧化锌。

Single step method worked well when total RNA in pea, rice, Broussonetia Papyrifera, Cycloru Parasiticus and Wedelia chinensis Osb.

发现一步法对豌豆、水稻和蟛蜞菊叶片总RNA的提取均有很好的效果。

Methods The template DNA was extract from the human osteosarcoma cells line U－2OS by the single- step isolation method with isothiocyanic acid guanidine, the cDNA coding for the mature fragment of BMP－4 was amplified by the reverse transcription- polymerase chain reaction.

方法采用异硫氰酸胍一步法从人骨肉瘤细胞株U-2OS中提取总RNA，通过逆转录-聚合酶链反应扩增为BMP-4成熟区cDNA基因片段。

Plasticizer DOTP was prepared from ethylene glycol residue (major component is PET low polymer) using single step process in which alcoholysis and ester interchange were combined.

以聚酯生产中产生的下脚料——乙二醇残渣为原料，采用辛醇合并醇解、酯交换一步法工艺，合成了增塑剂DOTP。

A simple numerical example demonstrates that the proposed approach is efficient and superior to single-stage method.

设计数学算例演示了序贯极大熵试验设计方法的效率，并证明优于一步法，适用于虚拟试验预测模型建模。

One-step preparation of HMX from DAPT was attempted, using ultrasonic as catalyst and ionic liquid as sorbefacient.

6以超声波为催化剂，离子液体为吸收促进剂，N_2O_5／HNO_3硝解DAPT一步法制备HMX。

Two compounds were synthesized with two methods. The two compounds can be synthesized by two steps with triethylamine as catalyst.

分别用氢氧化钠、三乙胺为缚酸剂，3-氨基-2-丁醇、2-氨基-3-戊醇、环己酮和二氯乙酰氯为原料，采用一步法和分步法合成了两种潜在除草剂安全剂。

A biodegradable polyurethane foam from liquefied polyol was successfully prepared by using water as vesicant in one step method.

其次，以液化多元醇代替部分聚醚多元醇，采用一步法制备了以水为发泡剂具有良好性能的环境友好可降解聚氨酯包装用泡沫塑料。

The influence of the structure and coupling degree for a test SSBR synthesized with one step method and multi functional initiator on the physical properties and dynamic mechanical properties of its vulcanizate was investigated by using SL552 made by JSR as control polymer.

研究了多官能团引发剂一步法合成的溶聚丁苯橡胶的结构及偶联程度对其物理性能和动态力学性能的影响，并与日本合成橡胶公司的SL5 5 2进行比较。

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