番茄红素生产菌株的筛选

本文采用光合细菌类生产番茄红素,对本实验室保存的光合细菌菌株产生番茄红素能力进行了比较,得到了番茄红素产生量较高的菌株R.azotoformansY6,其番茄红素产量为8.02×10-3mg/L。     

Simulation of smoke flow and longitudinal ventilation in tunnel fire

1 Introduction The tunnel is one of the important facilities of railroad and highway transportation, and also a throat of railroad and highway. With the development of transportation, there are more and more tunnels. Although the tunnel fire occurs seldo…     

对多媒体教学发展的几点建议

近些年以来,多媒体技术发展很快,它的应用范围已普及到社会、经济、生活的很多方面。并且已经对我们的的生活方式、工作方式带来巨大的影响和变革,尤其是对教育。多媒体教学手段的应用对教育、教学过程产生了极为深刻的影响。     

Mild oxidative degradation of spent auricularia auricular substrate and molecular composition of carboxylic acids in the resulting soluble portion

Spent auricularia auricular substrate(SAAS) was oxidatively degraded with aqueous hydrogen peroxide(AHPO)/acetic anhydride(AAH) to produce carboxylic acids(CAs) under mild conditions. The results show that up to 53.6% of the organic matter in SAAS was converted to the soluble species(SSs). In total 122 CAs were detected in the SSs by the analysis with a gas chromatograph/mass spectrometer, which can be classified into 29 group components, mainly being aliphatic acids and along with small amount of aromatic acids. Among the aliphatic acids, normal alkanedioic acids are the most abundant. The detected aromatic acids include benzoic acids,phthalic acids, trimellitic acids, pyromellitic acids, and their derivatives. The synergistic oxidation and the released ·OH, CH_3COO·, and HOO· induced by AHPO/AAH play crucial roles in oxidatively degrading SAAS.     

铝塑板的开发与应用进展

介绍了铝塑板的性能,生产的主要技术路线与最佳的操作条件及有关进展情况。对现工业化运行的主要铝塑板生产工艺的技术特点进行了具体的分析和总结,阐述了国内外研究开发的现状与发展趋势。并探讨了扩大应用范围等的前景与市场需求。     

黏胶纤维废水的处理研究

根据黏胶纤维废水水质特点及实际排放情况,在实验室内采用预处理-生化处理工艺进行了实际黏胶纤维废水处理效果研究。考察了各废水相互混合以废治废后再中和处理的效果以及对后续固定化微生物技术处理效果的影响,并取得了相关的最佳技术参数。实验结果表明,经两级处理后的黏胶纤维废水COD去除率可达95%以上,出水COD可达到50 mg/L以下。研究结果为实际工程改造提供了技术依据,也为同类的研究提供了参考。     

自动监测加药技术在独山子炼油厂循环水中的应用

通过循环水处理药剂示踪技术和自动监测加药装置的整体设计,在独山子炼油厂循环水南线系统首次应用了自动监测加药技术,使该系统的腐蚀速率和粘附速率及浓缩倍数控制在较好水平,成功地改善了该系统的水质稳定性,实现了节水和节药目的.     

稀土钛合金的开发与应用

全文介绍了稀土复合nmZSM -5型分子筛的性能,生产的主要技术路线与最佳的操作条件及有关进展情况.对现工业化运行的主要稀土复合nmZSM -5型分子筛生产工艺的技术特点进行了具体的分析和总结,阐述了国内外研究开发的现状与发展趋势.并探讨了扩大应用范围等的前景与市场需求.     

Esterification of lauric acid with butanol over mesoporous materials

Mesoporous silica (e.g. SBA-15) was evaluated in the esterification of lauric acid with butanol. ZnO/SBA-15 and MgO/SBA-15 were synthesized and characterized using N₂ adsorption/desorption isotherms at 77 K, ²⁹Si magic angle spinning solid state nuclear magnetic resonance (²⁹Si MAS NMR), X-ray diffraction (XRD) and Small-Angle X-ray scattering (SAXS). The nanostructural parameters obtained from SAXS analysis were very similar for all samples revealing that the impregnation method for incorporation of Zn and Mg in mesoporous silica did not affect its structure. Both catalysts ZnO/SBA-15 and MgO/SBA-15 were able to promote the esterification reaction of lauric acid with 1-butanol at mild reactions conditions.     

低醇苹果汁饮料发酵工艺的优化

以苹果为原料,利用高效活性酿酒干酵母发酵制得苹果汁.通过对产品的工艺条件进行试验,确定出最佳工艺条件为:接种量5%、发酵时间60h、质量比50%,在酿酒活性干酵母茵的最适发酵温度33℃下发酵培养,并通过试验分析方法的选择进行调配.此低醇苹果汁饮料产品感官指标上佳,口味独特,产品外观为诱人的浅黄色或金黄色.