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1.
扰流棒——有效提高烘缸干燥性能的辅助装置   总被引:1,自引:0,他引:1  
对扰流棒的工作原理、使用效果、特点以及安装进行了介绍.  相似文献
2.
In this work, we investigated the inhibitory activities of aqueous extract (Eaq), 30, 60, and 95?% ethanol extracts (E3et, E6et, and E9et), petroleum ether extract (Epe), ethyl acetate extract (Eae), and 2′,4′-dihydroxy-6′-methoxy-3′,5′-dimethylchalcone (DMC) from Cleistocalyx operculatus flower buds on pancreatic lipase and α-amylase, which were closely related to body weight and obesity. The inhibition effect of various extracts was determined by the Lineweaver–Burk plots. The results showed that the IC50 values of DMC, Epe, Eae, and E9et against pancreatic lipase were 101.5?μM, 38.65, 76.62, and 109.76?μg/ml, respectively, which were much lower than that of E3et and E6et. Eaq, E3et, E6et, and DMC strongly inhibiting the pancreatic α-amylase, with IC50 values of 73.10, 165.93, 231.23?μg/ml, and 69.35?μM, respectively. Furthermore, the kinetic analysis suggested that the inhibition mode of crude extract against pancreatic lipase was noncompetitive, while that against pancreatic α-amylase was competitive. The content of DMC and total polyphenols in each extract were determined by HPLC and spectrophotometric method, respectively. It was interestingly found that the DMC content had profound influence on pancreatic lipase activity, and the total polyphenols content significantly affected the pancreatic α-amylase activity. The findings in this work suggested that extracts from C. operculatus flower buds possess potent inhibitory activity against pancreatic lipase and α-amylase, and provided some new ideas for the prevention and treatment for obesity.  相似文献
3.
主要通过石膏型卤水企业卤水净化方式的比较及卤水成分变化的趋势分析.阐述卤水净化方式的适应性,并探索Mg2+对粘度的影响以及NaOH的加入对卤水成分的影响。  相似文献
4.
选择10种大孔树脂,以一点红黄酮的吸附率和解吸率为指标进行筛选,优选出一种分离纯化一点红黄酮效果较好的大孔树脂;并对筛选得到的树脂进行静态吸附动力学研究.结果表明,HPD722大孔树脂对一点红黄酮具有良好的吸附分离性能,优于其他大孔树脂,HPD722适用于一点红黄酮的分离纯化.  相似文献
5.
石膏型卤水体系真空蒸发制备NaCl过程中,CaSO4.2H2O对NaCl产品的纯度影响较大。研究了石膏型卤水体系中CaSO4.2H2O的结晶过程。实验研究了搅拌速率、停留时间、晶种量、温度等条件对石膏型卤水体系二水硫酸钙结晶过程的影响。研究结果表明:晶体的粒度开始随搅拌速率的增大不断增大,当搅拌速率达250 r/min时,晶体粒度达到最大值77.24μm;晶体粒度同样开始时随停留时间的增大而增大,当停留时间为120 min时达到最大值,此时平均粒径为70.39μm。CaSO4.2H2O晶体粒度随晶种量的增加而减小;在40℃~70℃范围内,晶体粒度开始随温度的升高而增大,在60℃时达到最大值,此时晶体的平均粒径为70.39μm,随后随温度的升高晶体的粒度逐渐降低。采用正交实验确定了石膏型卤水体系对二水硫酸钙生长影响的最佳实验条件为:温度为70℃、搅拌速率为250 r/min,停留时间为120 min,晶种量为3 g。此时的晶体的线生长速率为2.508×10-9 m/s。  相似文献
6.
张彦华 《国际纺织导报》2010,38(10):16-16,22
模块化结构纺丝机中,在满足设备操作性的基础上,为有效简化传动结构,使设备结构更为紧凑,开发了模块化双辊多丝传动机构。介绍了模块化双辊多丝传动机构结构、应用实例及特点。  相似文献
7.
随着国内外粘胶纤维需求量不断增大,我国粘胶纤维的产量也在快速增加,传统的粘胶短纤纺丝机无论在产量、规模、纺丝品种及纺丝工艺方面均不能满足市场的需求,这对纺丝机提出了更高的要求。就如何提高新型粘胶短纤纺丝机的产量进行了探讨  相似文献
8.
介绍了OptiDry、OptiDry Twin,OptiDry Vertical等先进干燥技术的发展、性能及特点。  相似文献
9.
主要介绍了以质量平衡和能量平衡为基础建立的烘缸干燥的计算模型,以此模型计算了通过调节通入到烘缸的蒸汽的压力来控制纸幅水份含量.  相似文献
10.
The antioxidant peptide was prepared from hydrolyzed egg of Apostichopus japonicus. Ultra-filtration, high-speed counter-current chromatography and gel filtration were used in peptide purification. In each step of purification, meanwhile, peptide was tested with its antioxidant ability. The purity and molecular weight was tested by using Tricine-sodium dodecyl sulphate-polyacrylamide gel electrophoresis. Results showed that the purified peptide obtained a sharply enhancing ability to scavenge hydroxyl radical from 37 to 89.82 U/mL. The purity of peptide was conformed and molecular weight was estimated about 30 KDa. It would be promising for purified peptide to be a good functional food resource.  相似文献
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