300h

1

The sample showed good stability during 300h continuous test at 80 ℃ .

在80℃时连续反应300h，催化剂表现出很好的稳定性。
2

The activity of immobilized cells decreased little after 5 batches use in semi - continuous fermentation and 300h use in continuous fermentation .

固定化细胞在半连续发酵中重复使用5批次，在连续发酵中使用300h，其余酸活性没有明显下降。
3

Cell , glucose and ethanol concentrations in the membrane bioreactor were nearly constant in the duration of 300h operation with the microorganism of Thermophilic Alcohol Active Dry Yeast ( TH-AADY ) .

微生物采用耐高温酿酒活性干酵母（TH-AADY），在膜生物反应器连续运行的300小时内细胞、葡萄糖和乙醇浓度保持相对稳定。
4

Life test indicated that 0.5 % Pt / 5 % SrO-5 % CeO2-Al2O3 catalyst had excellent performance during a 300h run , whose conversion rate and selectivity could be maintained over 95 % and 91 % respectively thus made it very promising for industrial use .

寿命测试结果表明0.5%Pt/5%SrO-5%CeO2-Al2O3催化剂在300h运转时间内其转化率和选择性可以分别稳定在95%和91%以上，具有理想的工业应用价值。