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士鋒生物DMEM培養基配制步驟
點擊次數:995 發布時間:2013-10-18
DMEM是現今細胞培養中比較常見的培養基之一,dmem培養基是建立在MEM培養基的基礎上研究出來的,它與MEM培養基相比較,DMEM培養基中加大了MEM培養基中各種成分的用量,以下配制DMEM的方法。
1. Measrue out 5% less distilled water than desired total volume of medium using a mixing container that is as close to the final volume as possible.
2. Add powdered medium to 15 to 30℃ (room temperature)water with gentle stirring. (Do not heat water)
3. Rinse out inside of package to remove all trAces of powder.
4. Add 3.7g of NaHCO3 per liter of medium.
5. Dilute to a desired volume with water. Stir until dissolved. (Do not over-mix)
6. Adjust pH of medium to 0.2-0.3 below desired final working pH* use of IN NaOH or IN HCl is recommended. (Add slowly with stirring) After pH has been adjusted keep container closed until medium is filtered.
7. Sterilize immediay by membrane filtration. (Positive pressure recommended) *pH unite will usually rise 0.1-0.3upon filtration.
二、《細胞生物學實驗》中配制方法如下:
1 制備新鮮三蒸水或Millipore超純水。
2 稱取所需量的干粉培養基,加入約終體積一半的三蒸水中;若配制一個包裝的培養液,在將整個包裝的干粉倒入三蒸水后,需用水洗包裝袋內面2次,倒入培養液中,以保證所有干粉都溶解成培養液。磁力攪拌或人工攪拌使之*溶解。
3 根據包裝袋上的要求補加所需量的碳酸氫鈉;根據實驗需要,添HEPES(5-20mmol/L)、谷氨酰胺和其他特殊物質。
4 加水定容到終體積。
5 必要時用1 mol/L 鹽酸和1 mol/L 氫氧化鈉調節pH。
6 用無菌0.22um濾膜過濾除菌,分裝于無菌血清瓶中,4℃冰箱保存。
配制好的培養液用前加入100U/mL青霉素和100U/mL鏈霉素,并根據需要加入血清(5%-20%)。
DMEM培養基應用廣泛。基于DMEM培養基中氨基酸、微生物含量豐富,并具有糖酵解中的丙酮酸和微量Fe離子,因此在細胞培養、疫苗生產等方面的應用zui為常見。