排序方式: 共有19条查询结果,搜索用时 15 毫秒
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以棉籽粕为原料,采用碱提酸沉法提取棉籽蛋白,对酸沉得到的蛋白质用蒸馏水、乙醇、双氧水、亚硫酸氢钠进行洗涤以进一步去除棉酚,经过对比选择亚硫酸氢钠作为脱除剂,并对其脱除条件进行优化。得到亚硫酸氢钠脱除棉酚的最佳条件为添加量为0.3%、温度为40℃,搅拌时间为2h。在最佳条件下,棉酚脱除率达到了68.92%,蛋白质含量为85.47%。 相似文献
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通过在黄姜发酵过程中添加氯化钙,探究Ca~(2+)作为激活剂对黄姜皂素得率的影响。以黄姜皂素得率为考察指标,在单因素试验的基础上,利用正交试验对黄姜发酵条件进行优化。结果表明,最适发酵条件为:CaCl_2添加量0.3%、pH为5.5、发酵温度60℃、发酵时间48h。在此条件下黄姜皂素得率为0.825%,高于自然发酵的得率0.692%。 相似文献
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近年来,新疆为响应全国"平安城市建设"的号召,在全疆范围内开展了"全球眼"网络视频监控业务,它是一项基于宽带网的图像远程监控、传输、存储、管理的业务,将分散、独立的图像采集点进行联网,实现跨区域的统一监控、统一存储、统一管理及资源共享。面对海量的视频数据,本文采用先进的云存储技术进行统一存储,并通过弹性云计算平台对视频数据进行统一管理。 相似文献
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Yuanyuan JIANG 《等离子体科学和技术》2022,24(5):54003
A 2D axial symmetry fluid model is applied to study the features of an atmospheric-pressure argon (Ar) plasma jet propagating into ambient nitrogen (N2) driven by a pulsed voltage, emphasizing the influence of gas velocity on the dynamic characteristics of the jet. The results show that the Ar jet exhibits a cylindrical-shaped channel and the jet channel gradually shrinks with the increase in propagation length. The jet propagation velocity varies with time. Inside the dielectric tube, the plasma jet accelerates propagation and reaches its maximum value near the nozzle. Exiting the tube, its velocity quickly decreases and when approaching the metal plane, the decrease in jet velocity slows down. The increase in gas speed results in the variation of jet spatial distribution. The electron density presents a solid structure at lower gas flow speeds, whereas an annular structure can be observed under the higher gas flow velocity in the ionization head. The jet length increases with the flow velocity. However, when the flow velocity exceeds a critical value, the increase in the rate of the plasma jet length slows down. In addition, the gas velocity effect on the generation and transport of the reactive particles is also studied and discussed. 相似文献
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