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When reached logarithm growth phase, it was poured or the medium was removed. 5 mL medium containing 10 mg/L mitocin-C was added , kept at 37 ℃, and then cultured in saturated humidity warm box with the CO2 of 0.05 fraction volume for 2 or 3 hours. It was coated with 0.1% gelatin in 6-hole plate, laid for over 30 minutes, and then threw away or the medium with mitocin-C was removed, washed with phosptat buffer for 5 times so as to remove the mitocin-C. 2 mL 0.05% trypsin digestive cells were added, and it was observed under microscope. When crevice appeared, cells became round (about 2-4 minutes), digestion was stopped by adding medium of the same volume, and blew up with straws repetitively to make it into monoplast suspension. Special-used cover glass was put in the center of cell counting chamber. Cells were sucked in by glass siphon, and cell suspension flew out at bucket of up or down-sides of counting chamber, until the cover glass was filled with fluid. Living cell were inoculated at concentrations of 3×108, 5×108, 1×109 L-1 after their number counted.
选取2~5代的小鼠胚胎成纤维细胞,待其至对数生长期倒掉或吸掉培养基,加入含10 mg/L丝裂霉素C的细胞全培养液5 mL,置37 ℃,体积分数0.05的CO2饱和湿度温箱中培养二三小时,在6孔板中加入0.1%明胶包被,放置30 min以上,倒掉或吸掉含丝裂霉素C的培养基,磷酸盐缓冲液清洗5遍,尽量除去丝裂霉素C,加入2 mL 0.05%的胰蛋白酶消化细胞,镜下观察,当细胞间出现裂隙,细胞变圆时(约2~4 min),立即加入等量的全培养液终止消化,并用吸管反复吹打,使之成为单细胞悬液,在细胞计数板中央放置专用的盖玻片,用玻璃虹吸管吸取细胞,让虹吸管在盖玻片上或下侧的计数板凹槽处流出悬液,至盖玻片下被液体充满为止。
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notchboard:凹板 凹槽侧板 梯级搁板 梯形槽口板
notchblock 凹槽滑车 | notchboard 凹板 凹槽侧板 梯级搁板 梯形槽口板 | notchbreakingtest 缺口断裂试验
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notch block:凹槽滑车
notch bending test ==> 切口挠曲试验 | notch block ==> 凹槽滑车 | notch board ==> 凹板,凹槽侧板,梯级搁板,梯形槽口板