树脂酚

Objective To explore the optimal techniques in separation of phenols from Melastoma dodecandrum with macroporous resins.

目的 筛选大孔树脂分离纯化地菍中总酚类物质的最佳工艺。

The experimental method and reaction conditions for synthesis of acetals and ketals on more than 40 catalysts such as solid superacids、 heteropoly acids、 con-exchange、 resins、 molecular sieves、 niobic acid、 vitamin C、 iodine、 sulfate、 chloride、 montmorillonite and etc.

综述了固体超强酸、杂多酸、固载杂多酸、脱铝超稳沸石、树脂、分子筛、铌酸、漆酚衍生物、维生素C、碘、硫酸盐、氯化物、蒙脱土等40多种催化剂催化合成缩醛的方法和反应条件。

The lignin-quaternary/polyvinyl alcohol composite resin was made from lignin after phenolization and amination,using glutaraldehyde as cross-linking agent,PVA as carrier.

利用木质素为原料，经酚化、胺化改性后，以戊二醛为交联剂，聚乙烯醇为载体，合成了季铵型木质素/PVA复合阴离子交换树脂。

Uncatalyzed Michael addition with polyhydric phenols to the base resin improves structural characteristics.

非催化Michael加成与多元酚基树脂改善结构特点。

The adsorptive characteristics and eluting parameters of the process were studied by taking the content of depsides as index.

目的：研究大孔吸附树脂富集丹参中总酚酸的工艺条件及参数。

The company claims to provide high quality natural plant extracts, such as tanshinone IIA, cryptotanshinone, salvianolic acid B, sodium tanshinone IIA sulfonate, seabuckthorn seed oil, wheat germ oil, DHA rich oil, wile chrysanthemum extract and oleoresin ginger.

可提供高品质天然植物提取物：丹参酮ⅡA、隐丹参酮、丹酚酸B、丹参酮ⅡA磺酸钠、沙棘籽油、小麦胚油、DHA精油、野菊花提取物、姜油树脂等。

Effect of chemical properties of naphthalene derivatives on adsorption was discussed, and it was concluded that naphthylamines with small dipole moment were ready to be adsorbed on nonpolar XAD-2 and XAD-4, while naphthols with high dipole moment were more likely adsorbed on XAD-7 and XAD-8 with medium polarity.

讨论了萘系列化合物性质对于吸附的影响，发现偶极矩小的萘胺分子更容易在非极性的XAD-2和XAD-4上吸附，而偶极矩大的萘酚更容易在中极性的XAD-7和XAD-8树脂上吸附。

The results show that the resin property is better when aldehyde/phenol molar ratio is 1.5～2.0 and the compound catalyst is used; the foam plastic property is good when solid content is h...

结果表明：醛/酚摩尔比为1.5～2.0、采用复合催化剂时，树脂性能较好；固含量较高时，泡沫塑料性能好；泡沫密度增大，强度提高，但保温性能变差

Effect of bonding strength and formaldehyde emission of plywood with low molar ratio urea-formaldehyde adhesive resin modified with p-aminophenol is investigated.

研究了对氨基酚(p-aminophenol)对低物质量比脲醛树脂的胶合强度和甲醛释放量的影响。

However, phenolic resin contains high contents of free phenol and free formaldehyde that cannot be removed substantially.

但是，在制备酚醛树脂的过程中，有大量的游离酚、游离醛不能反应完全，残留在树脂中，对环境和人体的危害极大。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。