多聚甲醛

The effects of three different fixatives （including paraformaldehyde, glutaraldehyde and the mixture of the two） and time of storage on the determination of picoplankton are compared.

对比了用流式细胞术现场测定及用多聚甲醛、戊二醛及两者的混合物这三种常用固定剂进行固定保存对微微型浮游生物样品的影响。

Result The spindles of oocytes were abnormal at 25℃ for 20 min, and disappeared at 25℃ for 30 min or at 4℃ for 10 min. 5, 10, 20 and 40 μg/ml Cytochalasin B for 2 h had no effects on the spindles of the oocytes. The spindles of oocytes were abnormal in 20 μmol/L colchicines for 1 h, and disappeared in 40 μmol/L colchicines for 1 h. The structure of spindles were perfect for 1-12 h when the oocytes were fixed in 4% paraformaldehyde.

结果］卵母细胞在25℃、20 min时纺锤体异常，25℃、30 min或4℃、10 min时纺锤体缺失；5、10、20和40μg/ml细胞松弛素B作用2 h未对纺锤体产生影响；卵母细胞在20μmol/L秋水仙素中作用1 h纺锤体异常，40μmol/L时作用1 h纺锤体缺失；在4%多聚甲醛中4℃条件下，卵母细胞纺锤体结构以固定时间为1~12 h效果较好。

The thermoset phenolic resin was synthesized by all the waste water from the former process, paraformaldehyde and phenol.

以上述热塑性酚醛树脂生产中排放的全部废水、多聚甲醛、苯酚为原料可以合成多种用途的热固性酚醛树脂。

Methods: P-toluenesulfonic acid diethoxyphosphorylmethyl ester (4) was prepared from diethyl phosphate and paraformaldehyde by condensation and esterification.

以亚磷酸二乙酯和多聚甲醛经缩合、酯化得到对甲苯磺酸羟甲基磷酸二乙基酯(4)。

Methods Healthy male SD rats of different age groups were recruited(1-, 2- and 3- week groups, 1- and 2- month groups, 6- month grown group, and 18- month aged group; n=5 each). Immunohistochemistry was performed on the coronal sections of brain of the rats perfused with paraformaldehyde.

健康雄性SD大鼠，分为7天、2周、3周、1月、2月、成年（6月龄）和老年（18月龄）7组，每组5只，共35只，多聚甲醛灌注固定，冰冻冠状切片，免疫组织化学染色，光镜观察摄像，细胞计数。

The copper/paraformaldehyde functure nanocomposite materials are made by high energy ball mill .

采用高能球磨法制备了铜/多聚甲醛纳米功能复合材料。

All of the specimens collected were divided into two parts, one part for immunohistochemical staining after fixated by 4% paraformaldehyde, the other part for culturing fibroblasts.

所有取材部位未经任何治疗，标本经无菌取材后分成2份，其中一份用40 g/L多聚甲醛固定后用于免疫组织化学检测，另一份用于成纤维细胞培养。

Methods After fixed by paraformaldehyde, vascular endothelial cells from pigs were co-cultured in vitro with natural killer cells from Chinese monkeys at different ratios. The change of the cytotoxicity of natural killer cells occurring after this contact and the content of IFN-γ and TNF-α in the supernatants were detected.

将中国猕猴的NK细胞与多聚甲醛固定后的猪血管内皮细胞按不同比例进行体外混合培养，检测NK细胞在以不同比例接触靶细胞后的杀伤活性变化以及培养液上清液中的IFN-γ及TNF-α含量。

Paraformaldehyde in PBS was a good fixative for mRNA preserving, structure identifying and tissue section cutting.

与其它固定液比较，我们发现4％多聚甲醛磷酸盐缓冲液能较好地保存细胞中的RNA，并且结构清晰，切片容易。

Acquisition of high-quality chromosome suspension: The chromosome suspension released from homogenization suited for flow karyotypic analysis and sorting after fixed in 2% paraformaldehyde for 20 minutes and purified through 10% and 30% sucrose concentration gradient.

高质量染色体悬液制备结果：同步化的根尖细胞经2%多聚甲醛固定20 min，机械匀浆释放染色体并结合10%及30%蔗糖浓度梯度纯化释放的染色体悬液。

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。