低温稀酸预处理玉米秸秆的研究

本文采用低温稀酸法预处理玉米秸秆,利用正交实验方法考察了反应时间、反应温度、硫酸浓度三个因素对预处理效果的影响,以水解液中木糖浓度和葡萄糖浓度比值和预处理后的物料酶解液中葡萄糖的浓度作为评价指标。实验结果表明：在固液质量比1:5时,硫酸浓度2 ％,温度90 ℃,反应时间12 h为最佳处理条件,此时水解液中木糖浓度和葡萄糖比值为4.43,酶解液中葡萄糖的浓度为2.76%。     

Hydrological and mechanical properties of plants to predict suitable legume species for reinforcing soil

Plants have considerable hydrological and mechanical impacts on soil. However, there are lack of documentation and limited understanding on the hydro- logical and mechanical impacts of tropical legume trees. Therefore, this study was aimed to investigate the hydro- logical and mechanical properties of three selected legume plants, Leucaena leucocephala, Adenanthera pavonina and Peltophorum pterocarpum. Regarding hydrological aspect, the study results indicated that soil on which the L. leu- cocephala was grown had the highest transpiration rate, water absorption rate （WAR） and soil matric suction （SMS）. In terms of mechanical characteristics, L. leuco- cephala exhibited the highest root tensile strength and cellulosic components in the root. Interestingly, L. leuco- cephala also showed a higher root biomass, root length and fine roots than A. pavonina and P. pterocarpum. The leaf area index （LAI） strongly correlated with SMS （R2 = 0.74）, indicating that high LAI improved SMS. The high root tensile strength and fine roots of L. leucocephala make this species special for growing as a soil reinforcing plant. Overall results suggested that L. leucocephala exhibited outstanding hydrological and mechanical prop- erties and can be a potential plant for the soil reinforcement program.     

饲料酵母工业的概况和展望

<正>本文对饲料酵母工业的现状,饲料酵母的饲养价值以及发展饲料酵母生产的重要性作了较全面的介绍。饲料酵母的饲养价值相当于鱼粉,大力发展饲料酵母工业是解决我国蛋白质饲料不足的有效途径。该文还就充分利用农、林业纤维废料、有机废液生产饲料酵母等问题提出了有关建议。     

A NEW PROCESS OF COMBINATION OF INORGANIC PARTICLES WITH CELLULOSIC FABRICS

Instead of finishing the fabrics with inorganic particles by a binder, in this study the fine aluminium oxide powder were added during the polymerization system of a monomer with functional hydroxyl groups HPMA. The hot alkaline testing showed that the Al_2O_3 particles had reacted with the polymer latex. The absorbability and wash durability of the fabric treated with such a latex with Al_2O_3 were measured.