聚酰胺

The chloroform layer and the aqueous layer were separated by multiple column chromatography including macroporous resin, silica gel and polyamide column and preparative HPLC. The compounds obtained were identified by mass spectra and NMR data.

大青叶乙醇提取物，用氯仿萃取后得到氯仿层和水层，各层再分别采用硅胶柱、大孔树脂柱、聚酰胺柱、制备液相、葡聚糖凝胶柱层析及重结晶等分离手段进行分离、纯化，并应用化学性质和质谱、波谱法（1H-NMR、13C-NMR、HMBC）鉴定其化学结构。

The studies on preparation and modification of aromatic polyamide membranes in recent 10 years were reviewed in detail.

对近10多年来芳香聚酰胺类反渗透膜的制备，改性等方面的研究进行综合评述。

An HPLC method was developed to determine bright blue in bitter gourd beer .

本文采用聚酰胺粉吸附提取苦瓜啤酒中的色素亮蓝。

Especially preferred are waxes and polyamide polymers containing at least one carboxylic acid group as the metal chelating group.

尤其是首选的是含蜡和螯合金属的至少一个羧酸组聚酰胺聚合物。

Thermal imidization of the polyamic acid derived from BPADA and BAPS was investigated mainly by GPC and FTIR equipped with an in-situ hot cell.

利用GPC、原位FTIR测定了长链聚酰胺酸PAA由双酚A二酐与 4 ，4′-二(4-胺基苯氧基二苯酚制备的热环化过程。

Continuous growth of dendrons from G1.5 to G4 at the both ends of PSt chains was carried out by the iterative Michael addition reactions with excess PZ and following TT. Structures of the triblock polymers were characterized by GPC and ~1H NMR spectra.

随后，聚合物链末端反复用过量的哌嗪和TT进行迈克尔加成反应，使树枝状聚酰胺胺嵌段不断增长，得到G1.5到G4的嵌段共聚物。

Depending on the China market demand and combined with the various structures as well as the development direction of the domestic and foreign hardeners. This company mainly invests modified amine and polyamide series products appropriate to the epoxy resin development and mutually promotes.

根据中国市场需求并结合国内外固化剂的品种结构及发展动向，本公司重点投入改性胺和聚酰胺等系列产品与环氧树脂配套发展，互相促进。

Air Products offers a full line of performance-oriented epoxy hardeners, polyamides and modifiers for a variety of applications, including coatings, civil engineering, adhesives and composites.

空气化工产品有限公司提供一整套高性能的环氧树脂固化剂、聚酰胺和改性胺固化剂，可应用在涂料、土木建筑工程、胶粘剂和复合材料等多个领域。

The influence of a series of polymers with active groups including polyalcohols, polyamide and polysaccharide on the seed precipitation of sodium aluminate solution was investigated.

摘 要：研究了聚醇、聚酰胺和聚糖等一系列含有活性基团的聚合物对铝酸钠溶液种分过程的影响。

So far, the company has designed polyamide resin plant successfully: 1000 mt/year, 4000 mt/year, 10000 mt/year; Rebuilding design successfully for the internal medium scale lipidic chemical plant, to provide technical services successfully for part of the fine chemical industry enterprises.

到目前为止，公司已成功设计了1000吨/年、4000吨/年、10000吨/年二聚酸聚酰胺树脂装置；成功为国内中型油脂化工企业作装置改造设计，成功为部分精细化工企业提供技术服务。

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。