Cord blood separation and volume reduction is first needed to meet THD practical bank requirement for the high expense of liquid nitrogen preservation equipment.
同时由于脐血库液氮保存设备费用昂贵，需要预先分离脐血单个核细胞以减少样本冻存体积，以满足建库实际需求。
These results indicate that bovine follicular oocytes can be frozen for long term preservation in liquid nitrogen and mature in vitro after thawing.
研究结果证明，牛卵巢卵母细胞可作超低温冷冻长期保存，解冻后可以体外培养成熟。
Conclusion the liquid nitrogen rapid freeze method is the best anti-ice crystal mation method for section preservation.
结论低温骤冷法是这三种防冰晶法中最利于保存切片的方法。
In the determination of total nitrogen in water sample by flow injection analysis instrument, the concentration of sulfuric acid which used for the preservation of sample affected the result.
用流动注射仪测定总氮水样，发现用不同的硫酸浓度保存总氮样品时，对其测定结果有一定的影响，并与过硫酸钾氧化-紫外分光光度法进行比对和分析。
Liquid nitrogen was shown to be an effective measure for long-term preservation of cultured hepatoma cells.
因而证明，液氮冻存法是培养细胞长期保种的一个行之有效的方法。
Liquid nitrogen was shown to be an effective measure for long-term preservation of cultured hepatoma cells.
因而证明，液氮冻存法是培养细胞长期保种的一个行之有效的方法。
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