松香的

In this paper,firstly a series of acryloxyl derivatives were synthesized from the dehydrogenated abietic acid,a main composition of disproportionated rosin, through acyl chloridation and esterification.The derivatives included the (β-acryloxyl ethyl) esters of dehydrogenated abietie acid,(β-methacryloxyl ethyl) esters of dehydrogenated abietic acid and (β-methacryloxyl propyl)esters of dehydrogenated abietic acid.

论文首先以歧化松香中的主要成分脱氢枞酸为模型化合物，采用酰氯化、酯化手段合成了它的一系列丙烯酰氧基衍生物，包括脱氢枞酸酯、脱氢枞酸(β-甲基丙烯酰氧基乙基)酯和脱氢枞酸(β-甲基丙烯酰氧基丙基)酯。

School of Pharmacy, China Pharmaceutical University, Nanjing 210009Abstract : ent-Abietane diterpene lactones are extracted from the plants of Euphorbia. Their elementary structures are four-ring diterpenes.

松香烷内酯是大戟属植物中提取的一种典型二萜类化合物，其基本结构为四环二萜，有多种药理活性，特别是有较强的抗肿瘤活性。

The kind and amount of antioxidant s and light stabilizers which affected the stability of colorless rosin pentaerythritol ester were studied.

以无色松香季戊四醇酯的热稳定性、耐候性和储存稳定性为考察指标，对抗氧剂和光稳定剂的稳定化作用进行了研究。

The kind and amount of antioxidants and light stabilizer s which affected the stability of colorless rosin pentaerythritol ester were studied.

以无色松香季戊四醇酯的热稳定性、耐候性和储存稳定性为考察指标，对抗氧剂和光稳定剂的稳定化作用进行了研究。

The effects of d isproportionated potassium rosinate on the polymerization of cold ESBR and the stability of the latex were studied.

研究了以歧化松香酸钾皂作为主乳化剂时，对低温乳液聚合丁苯橡胶的聚合及胶乳稳定性的影响。

Tinning the ends of the wires makes a better joint when you solder them.

焊接电气连接点时使用的松香之类的助焊剂。

The basis for the Nota is that when finely divided rosin is exposed to air, it will oxidise because of its large surface area.

对于顾客的依据是，当幼小的松香是暴露在空气中，将氧化后，由于其比表面积大。

Application of natural products in slow/controlled-release fertilizes was reviewed. Rosin、humic acid、lignin、Vegetable oil and natural rubber applying in coaling fertilizer were indroduced emphatically.

摘要综述了国内外几种天然产物松香、腐殖酸、木质素、多聚糖、植物油、天然橡胶在缓／控释肥料中的应用情况，看重介绍了这几种天然产物在包膜肥料中的应用现状。

This investigation of the mechanism of premixing alum-rosin size for neutral-alkaline papermaking process focused on the mixture solution charge and particle size distribution.

中碱性造纸过程中松香明矾预混和过程的研究主要集中在混和液的电荷及粒度分布。

Tall oil is a major by-product in sulfate or Kraft pulping process,from which high-grade tall oil as well as its distillation products tall oil rosin and tall oil fatty acid are prepared as important materials for fine chemicals.

木浆浮油是硫酸盐法制浆造纸重要的副产品，高品质木浆浮油及其精馏产品浮油松香、浮油脂肪酸等都是重要的精细化工原料。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。