排序方式: 共有18条查询结果,搜索用时 31 毫秒
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两歧双歧杆菌1.1852的工业化发酵工艺 总被引:1,自引:0,他引:1
通过优化获得适合双歧杆菌工业化生产的,成本低廉的工艺条件。通过单因素试验,从番茄汁、低聚果糖、废糖蜜、马铃薯淀粉、玉米浆、豆饼粉6个因素中选出较优因素,并通过L9(3)4正交试验确定双歧杆菌发酵培养基的适宜配方及适宜发酵条件。结果表明:适宜的发酵培养基组成为番茄汁80ml/L、低聚果糖15g/L、废糖蜜20ml/L、玉米浆110mL/L、0.1%刃天青1mL/L、吐温-801mL/L、盐溶液40mL/L及L-半胱氨酸盐酸0.5g/L;适宜的培养条件为温度40℃、起始pH6.8、接种量3%,发酵时间32h。优化得到的培养基成本较低,发酵条件简单易控,适合双歧杆菌工业化生产。 相似文献
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为了减少钢管水压试验过程中造成的水资源浪费,对钢管生产线3 500 t水压机基本工作原理及供水管路进行了分析和研究,设计了一种新型的具有自清洗功能的过滤装置,对原来的高压水箱的供水管路进行了改造。该过滤装置滤芯由3层不锈钢过滤网组成,成本低,易于维护保养,过滤效果好。实际使用表明,改进后的供水管路运行稳定,实现了水资源的循环利用,有效地改善了高压水箱的供水问题,减少了水资源的浪费。 相似文献
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为了确保大直径钢管水压试验中高低压切断、放气、卸载等功能的准确控制,进一步降低油控水阀的故障率,使用Solidworks和AMEsim平台建立了一种先导式油控水阀模型,研究了阀芯质量、阀芯夹角、弹簧刚度、阻尼孔直径等参数对先导式油控水阀的性能影响。研究结果显示,减小主阀芯的质量、尽量减小阀芯夹角、采用弹性柱销体替代弹簧、减小阻尼孔的孔径等手段可有效提高油控水阀的使用寿命。仿真及验证表明,先导式水阀的受力情况、响应速度、使用寿命等性能指标均优于传统的油控水阀,并可显著降低加工、维修成本。 相似文献
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Tian Yufei Yang Wei Chen Gang Men Chuanlong Gu Yifan Song Xiaoran Zhang Ruilin Wang Laiyou Zhang Xin 《Food science and biotechnology》2022,31(2):155-164
Food Science and Biotechnology - Currently, gut microbiota living in the gastrointestinal tract, plays an important role in regulating host’s sleep and circadian rhythms. As a tool, gut... 相似文献
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水利基础设施建设,关键是必须建立和完善稳定增加的投资渠道,重中之重是必须确保水利建设高标准,高质量,江西省樟树市因地制宜,搞活政策,在群众自愿的基础上,用活劳动积累工,以资代荣,集中资金,集中力量,突出质量,大搞重点水利建设,闯出了一条新的路子。 相似文献
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Wang Chengxi Guo Rishuo Gu QuLiang Wang Laiyou Hou Lianbing 《Drug development and industrial pharmacy》2019,45(5):695-702
The purpose of this study was to prepare a novel cryptotanshinone-loaded nanoemulsion (Cry LN) and to evaluate its prevention effect on the postoperative peritoneal adhesions (PPA). The Cry LN was prepared by high-pressure homogenization method, and various methods were used to investigate the physicochemical properties. The results showed that Cry LN has nanoscale particle size with uniform distribution and could slowly release the incorporated drug compared with Cry solution. With superior safety, Cry LN could increase the ratio of tissue plasminogen activator (tPA)/plasminogen activator inhibitor-1 (PAI-1) up to 673% compared with control group. Furthermore, in vivo animal study confirmed the Cry LN activated the fibrinolytic system and successfully prevented PPA formation in rat. In conclusion, Cry nanoemulsion could be considered as a potentially promising and effective strategy for PPA treatment. 相似文献