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An unstable important intermediate ,2- methoxymethyl-hydroquinone which is very easy to oxidize and polymerize, and its precursors were first synthesized, a...

第一、二条合成线路前人未见报导，从中得到了四个苯并呋喃类衍生物，并详细地探索了环化反应的条件。

As we know, Al-Beta synthesized in a common system free of Ge is usually composed of polymorph A and B, while polymorph C was hard to form in such a synthesis system.

我们知道，铝-β合成在一个共同的系统通常是免费葛晶型A和B组成，而变形C是很难形成这样的合成系统。

In order to improve the frequency resolution, realize high precision frequency estimation, this thesis proposes the high resolution polynomial Wigner-Ville distribution using Chirp-Z transform, the validity of this algorithm is verified using synthesized data.

为了提高基于FFT的谱分析算法的分辨率，实现高精度的频率估计，提出了利用Chirp-Z变换的频率高分辨多项式Wigner-ville分布，并用合成的仿真数据，验证了上述算法的有效性和正确性。

The synthesized nonabsorbable materials is one kind of implant materials that achieve wide application, such as polypropylene, polytetrafluoroethylene and other patches.

合成的不可吸收材料是目前使用最多的植入材料，如聚丙烯、聚四氟乙烯及其复合补片。

Seven new type of porphyrin ligands were designed and synthesized.

设计合成了含卟啉结构单元的7个化合物。

Based on 5,10,15,20-tetrakis (4-hydroxyphenyl) porphyrin (2), a series of water insoluble and water-soluble metalloporphyrins has been synthesized.

以5，10，15，20-四卟啉（2）为原料，合成并表征了一系列水溶性和非水溶性的金属卟啉。

X molecular sieve was synthesized from potash feldspar ores by baking and hydrothermal synthesizing procedures.

以钾长石为主要原料，经焙烧和水热合成工艺，合成了13X分子筛粉。

Bromobutane was synthesized from potassium bromide and n-butyl alcohol by adding concentrated sulfuric acid in water. Various affecting factors were investigated.

以溴化钾、正丁醇为反应原料，水为溶剂，滴加浓硫酸合成溴代正丁烷。

Bromooctane was synthesized from potassium bromide(by-product of synthesizing 2-hydroxy-4-octyloxybenzophenone) and n- octanol using concentrated sulfuric acid as a catalyst.

以生产2-羟基-4-正辛氧基二苯甲酮的副产物溴化钾和正辛醇为原料，浓硫酸为催化剂，合成了溴代正辛烷。

Benzyl bromide was synthesized from potassium bromide ,a by-product from synthesis of 2-hydroxy-4-n-octyloxybenzophenone(UV-531),and benzoic alcohol in the presence of concentrated sulfuric acid.

溴化钾作为工业生产2-羟基-4-正辛氧基二苯甲酮的副产品，在浓硫酸存在的条件下，与苯甲醇进行反应合成苄基溴。

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