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发酵工艺条件
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  conditions of fermentation
    The researches about production of astaxanthin from fermentation by microorganisms were reviewed, including producing strains, biosynthesizing pathway, operating conditions of fermentation, methods of extraction and analysis, and so on. The prospects about researches were presented.
    对微生物发酵法生产虾青素的微生物菌种、生物合成代谢途径、发酵工艺条件优化和提取分离检测方法等方面的研究现状进行了综述 ,并展望了微生物发酵法生产虾青素的前景
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  “发酵工艺条件”译为未确定词的双语例句
    Studies on the Technology Conditions of α-Amylase Fermentation from the Hydrolysate
    以水解液为原料的α-淀粉酶发酵工艺条件的研究
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    Experimental Study on the Technological Conditions ofα-Amylase Fermentation
    α-淀粉酶发酵工艺条件试验研究
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    The optimal fermentation temperature is 34-36'C.
    实验确定了较优培养基组成和发酵工艺条件,适宜的发酵温度为34-36℃;
    The Optimization of Fermentative Conditions for Producing Glucoamylase from the Waste Liquid of Grain Stillage
    利用酒精糟液生产糖化酶发酵工艺条件的优化
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    Fermentation Technology of Alkaline Lipase Produced by Penicillium cyclopium PG37
    圆弧青霉PG37碱性脂肪酶的发酵工艺条件
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  conditions of fermentation
The investigation of intermediate two-step addition of glucose under identical conditions of fermentation showed an enhanced production of gellan (8.12 g/L) as compared with the control (6.0 g/L).
      
The production of this phenoxazone could be enhanced by optimizing the conditions of fermentation.
      
fructivorans) but also on the conditions of fermentation of the sour dough.
      
Nutritional requirements for the production of ergot alkaloids were studied with Aspergillus fumigatus under submerged conditions of fermentation, in a chemically defined medium.
      
The other conditions of fermentation were: Temperature 30°C, gyratory shaker speed 160 rev.
      
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The variant K211 strain was selected and bred from B.Subtilis BF-7658.The fermentatioa condiiion under shaking flask was investigated. The result showed that the optimumconsistency of culture media was 15-19%, the best ratio of carbon source to nitrogen source was two to one. and the activity of produced a-amylase was at 527u/ml. Further tests made in 23m3 fermentation tank showed that above consistency was suitable- the activity of produceda-amylase was at 460u/ml, which was the average value based on twelve...

The variant K211 strain was selected and bred from B.Subtilis BF-7658.The fermentatioa condiiion under shaking flask was investigated. The result showed that the optimumconsistency of culture media was 15-19%, the best ratio of carbon source to nitrogen source was two to one. and the activity of produced a-amylase was at 527u/ml. Further tests made in 23m3 fermentation tank showed that above consistency was suitable- the activity of produceda-amylase was at 460u/ml, which was the average value based on twelve batches. This fermentation process has the advantage of steady operation, and shorter fernemtatjoaperiod, so that better utilization oi equipment could be achieved.

对所选育出的枯草杆菌BF—7658变异株K211菌种,在摇瓶条件下进行了发酵条件的研究。研究结果表明菌种的发酵培养料浓度在15—19%之间,碳氮比以2/1为宜。在此浓度范围内,摇瓶发酵酶活力达527U/ml。经23M~3发酵罐放大试验证实,该配方是适宜的。在23M~3罐上发酵12罐,α—淀粉酶活力平均在460u/ml。用K211菌种生产α—淀粉酶具有生产性能稳定,均35小时)可提高设备利用率等优点。 提高α—淀粉酶生产菌种的产酶活力,是我国目前酶制剂行业中关注的问题之一。为达到提高α—淀粉酶活力的目的,我们对菌种和工艺条件进行了研究。有关枯草杆菌BF—7658变异株K211菌株的选育过程,在1986年第6期《食品与发酵工业》中已作报道。本文主要进行K211菌发酵工艺条件的研究。

The kinetic study of batch fermentation by immobilized Lactoba--cillus delbrueckii in Ca-alginate was conducted and compared with free cells. Batch processes of high substrate concentration and continuous fermentation in recycle packed bed bioreactor were also studied. Com-pa red to free cells,immobilized cells show higher lactic acid formation rate but the specific growth rate appears to be comparatively low. Immobili -zation does not change the best growth temperature and pH. Both of substrate and product...

The kinetic study of batch fermentation by immobilized Lactoba--cillus delbrueckii in Ca-alginate was conducted and compared with free cells. Batch processes of high substrate concentration and continuous fermentation in recycle packed bed bioreactor were also studied. Com-pa red to free cells,immobilized cells show higher lactic acid formation rate but the specific growth rate appears to be comparatively low. Immobili -zation does not change the best growth temperature and pH. Both of substrate and product have inhibitory effects on the fermentation. The constants of saturation and inhibition for the growth of immobilized cells increase. The best process from high substrate fermentation was glucose 120~l30g/l and fermentation time 68~72 hours, and the lactic acid reached l00g/l.The best run of continuous processes was substrate 50g/l and dilution rate 0.048-0.09 1/h, and the yield reached 78%.

本文对海藻酸钙固定化德氏乳酸杆菌的间歇发酵动力学进行了探讨,并对固定化细胞高糖浓度发酵以及外循环固定化细胞反应器连续发酵工艺条件进行了研究。结果表明:固定化不改变细胞的最适生长温度和pH;底物和产物均对细胞生长有抑制作用;固定化细胞生长的饱和常数和抑制常数增大,比生长速率减小,产酸速率增加;高糖浓度发酵最适工艺条件为初糖浓度120~130g/l,发酵时间68~72h,发酵液中乳酸浓度可达100g/l;外循环固定化细胞反应器连续发酵最适工艺条件为初糖浓度50g/l,稀释速率0.048~0.09l/h,转化率达78%。

2-Keto-L-gulonic acid (2-KLG), the precurcor of L-ascorbic acid synthesis, was prepared directly from D-glucose by tandem fermentation. In the first step fermentation Erwinia sp. SCB 247 translated D-glucose to 2,5-diketo-D-gluconate (2,5-DKG), which accumenlated 180 mg 2,5-DKG per ml in the broth. In the second step fermentation Corynebacterium sp. SCB 3058 reduced 2,5-DKG to 2-KLG, which accumulated 35 mg 2-KLG per ml in the broth. This reductive fermentation was obtained under aerobic conditions by adding...

2-Keto-L-gulonic acid (2-KLG), the precurcor of L-ascorbic acid synthesis, was prepared directly from D-glucose by tandem fermentation. In the first step fermentation Erwinia sp. SCB 247 translated D-glucose to 2,5-diketo-D-gluconate (2,5-DKG), which accumenlated 180 mg 2,5-DKG per ml in the broth. In the second step fermentation Corynebacterium sp. SCB 3058 reduced 2,5-DKG to 2-KLG, which accumulated 35 mg 2-KLG per ml in the broth. This reductive fermentation was obtained under aerobic conditions by adding a hydrogen donor such as glucose.The average yield of five batches fermentation was 56.3 mol%, from D-glucose to 2-KLG in 10 L fermentor.

研究了在10L发酵罐中D-葡萄糖串联发酵生产维生素C前体——2-酮基-L-古龙酸的发酵工艺条件。第一步发酵采用欧文氏菌(Erwinia sp.)的突变株SCB247,培养36小时,可将D-葡萄糖转化成中间体2,5-二酮基-D-葡萄糖酸,在发酵液中约累积180mg/ml。第二步发酵采用棒状杆菌(Corynebacterium sp.)SCB3058,可将2,5-二酮基-D-葡萄糖酸专一性地还原生成2-酮基-L-古龙酸。在细胞生长进入对数生长期后期时,加入经十二烷基硫酸钠处理的第一步发酵液,约50小时以后,在发酵液中可累积35mg/ml的2-酮基-L-古龙酸。用10L发酵罐进行五批实验,结果表明,从D-葡萄糖到2-酮基-L-古龙酸的平均转化率为56.3mol%。

 
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