查询词典 polyester resin

Methods: Thirty extracted human molars whose pits and fissures on the occlussal surface had been inoculated with Escherichia coli were randomly divided into three groups: group A was treated with newly confected phenol-formaldehyde resin which resinified the dental fissure contents, group B was sealed Bis-GMA resin in pits and fissures and group C as the control group was only treated by cleaning.

选择30颗人离体磨牙，在咬合面点隙裂沟接种大肠杆菌，随机分为3组；A组以新配制的酚醛树脂使点隙裂沟内容物树脂化，B组以成品Bis-GMA封闭剂作点隙裂沟封闭，C组仅进行表面清洗作为对照组；各组分别沿裂沟点隙处片切牙齿，放入LB培养基培养，观察大肠肝菌生长情况。

This paper presents its preparation process and property, discusses the influence of aldehyde/phenol ratio, catalyst and reaction time on resin property, and the influence of resin solid content, modifier and density on foam property.

介绍了其制备工艺和性能，讨论了醛/酚比、催化剂和反应时间对树脂性能的影响，以及树脂固含量、改性剂、密度对泡沫性能的影响。

The Fourier transform-infrared spectra of the blue ballpoint inks exposed to ultraviolet light were studied. This research discovered that the solvents volatilized rapidest, and then the rate of polymerization and cross-link process of the epoxy resin took second place, and the decomposition of triarylmethane dyes was slower, and alkyd resin was relatively steady.

在紫外光照射下，通过对蓝色圆珠笔字迹色痕FT-IR显微光谱的研究，发现溶剂挥发迅速；其次是环氧树脂的聚合、交联；三苯甲烷染料的分解比较缓慢；而醇酸树脂相对稳定。

The connection between the bottom support board and the pillar should reserve the foot bolt hole, the hole sizeshould be bigger than or be equal to three times of the diameter of the feet bolt, the depth slightly is bigger than the foot bolt length. Pouring into the epoxy resin mortar into the hole, its mixture ratio is the epoxy resin (6,101), DBP17, ethylenediamine 8, and granulated substance

下支座板与墩台的连接则应预留地脚螺栓孔，孔的尺寸应大于或等于三倍地脚螺栓的直径，深度稍大于地脚螺栓的长度，孔中灌注环氧树脂砂浆，其配合比为环氧树脂（6101），二丁脂17，乙二胺8，砂250。

Firstly, phenyliodine diacetate was immobilized to the 2% cross-linked polystyrene or the liner polystyrene resin. The more iodine the resin had, the lower conversion to phenyliodine diacetate. We made our endeavor to extend the range of useful application of polystyrene supported phenyliodine diacetate in organic synthesis:(1) the reagent was used as an effective reagent of carbonyl regeneration from oximes and semicarbazones of ketones.(2) the reagent was also applied to the synthesis of 1, 3, 4-oxadiazoles, 1, 3-disubstituted-2-pyrazoline, 2-arylbenzoxazole from aldehyde N-acylhydrazones, aldehyde hydoazones and phenolic Schiff's bases respectively.

首先，我们以2％交联的聚苯乙烯和线性的聚苯乙烯树脂为载体，制备了聚合物负载的二醋酸碘苯，通过研究发现：(1)聚苯乙烯二醋酸碘苯是酮肟、缩氨脲有效的去保护试剂，不仅芳香酮，脂肪酮和α，β不饱和酮的肟、缩氨脲也能顺利转化为相应的酮，实现酮基的再生；(2)我们还利用此试剂，分别与醛的N-酰基苯、N-酰基苯腙及邻羟基芳亚胺反应，在温和的条件下发生成环反应，以良好的产率生成1，3，4-噁二唑、吡唑啉和二取代苯并噁唑等杂环化合物；(3)聚苯乙烯二醋酸碘苯还可有效地将邻羟基芳酮的酰腙经氧化、重排成1，2-二酰基苯。

Resin plate process is divided into film production processes and resin-version of the drying process itself.

树脂版的制作历程分为底片制作历程和树脂版本身的晒制历程。

Acrylic resin casting resin FRP profile FRP board FRP door and window FRP closet etc.

不饱和树脂、玻璃钢型材、玻璃钢舨材、玻璃钢门窗、玻璃钢浴室等。

Acrylic resin, casting resin, FRP profile, FRP board, FRP door and window, FRP closet, etc.

不饱和树脂、玻璃钢型材、玻璃钢板材、玻璃钢门窗、玻璃钢浴室等。

Acrylic resin, casting resin, frp profile, frp board, frp door and 玻璃钢沼气罐, frp closet, etc.

不饱和树脂、玻璃钢型材、玻璃钢板材、玻璃钢门窗、玻璃钢浴室等。

METHDOS: Pulp cavity perforations were created in the pulpal floor of 55 extracted tooth. They were repaired with amalgam、flowable resin、Chinese gall compound recipe under amalgam、Chinese gall compound recipe under resin and MTA. Then the sealing ability of different materials by dye penetration were evaluated.

在55个离体牙上制造髓室底穿孔模型后，分别用银汞合金、复合树脂、复方五倍子作屏障银汞合金修复、复方五倍子作屏障复合树脂修复及MTAMTA组）修复，通过染料渗漏法测定各组渗漏情况。

However it can often be frust ating for a child when people are unable to pronounce their name.

但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。

All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.

所有化合物均为首次从本属海藻中分离得到，其中4cumylphenol为新天然产物。