In complex digestion and metabolism of rumen, rumen microbes play a decisive role. Currently, the relationship between rumen microbial system and rumen metabolism has not been understood comprehensively, which will be...In complex digestion and metabolism of rumen, rumen microbes play a decisive role. Currently, the relationship between rumen microbial system and rumen metabolism has not been understood comprehensively, which will be reviewed in the paper, with particular focus on digestion and metabolism of bacteria, fungi and protozoa in the rumen of ruminants.展开更多
以赤铁矿纯矿物作为研究对象,通过沉降试验来考察不同方式的磁化处理作用对赤铁矿絮凝沉降行为的影响。结果表明:矿浆和药剂在经过磁化处理后,絮凝效果明显优于未经过磁化处理的絮凝效果,且磁场强度越高絮凝效果越好;在矿浆磁化和药剂...以赤铁矿纯矿物作为研究对象,通过沉降试验来考察不同方式的磁化处理作用对赤铁矿絮凝沉降行为的影响。结果表明:矿浆和药剂在经过磁化处理后,絮凝效果明显优于未经过磁化处理的絮凝效果,且磁场强度越高絮凝效果越好;在矿浆磁化和药剂磁化为60 min时赤铁矿沉降率达到最大值,分别为73.9%和72.7%,磁化矿浆比磁化药剂对赤铁矿絮凝的效果好;磁化矿浆和磁化药剂两种不同磁化处理方式下的赤铁矿颗粒Zeta电位测量结果表明,磁化处理会改变赤铁矿颗粒的Zeta电位,分别从-50.765 m V减小至-43.538 m V和-44.006 m V;磁化处理降低了赤铁矿颗粒间双电层排斥力,降低颗粒间的势能垒,使赤铁矿颗粒更易于聚团,絮凝效果增强;赤铁矿与淀粉红外光谱研究结果表明,赤铁矿与淀粉分子间存在着化学吸附和氢键作用。展开更多
基金Supported by National Natural Science Foundation of China(31040081)
文摘In complex digestion and metabolism of rumen, rumen microbes play a decisive role. Currently, the relationship between rumen microbial system and rumen metabolism has not been understood comprehensively, which will be reviewed in the paper, with particular focus on digestion and metabolism of bacteria, fungi and protozoa in the rumen of ruminants.
文摘以赤铁矿纯矿物作为研究对象,通过沉降试验来考察不同方式的磁化处理作用对赤铁矿絮凝沉降行为的影响。结果表明:矿浆和药剂在经过磁化处理后,絮凝效果明显优于未经过磁化处理的絮凝效果,且磁场强度越高絮凝效果越好;在矿浆磁化和药剂磁化为60 min时赤铁矿沉降率达到最大值,分别为73.9%和72.7%,磁化矿浆比磁化药剂对赤铁矿絮凝的效果好;磁化矿浆和磁化药剂两种不同磁化处理方式下的赤铁矿颗粒Zeta电位测量结果表明,磁化处理会改变赤铁矿颗粒的Zeta电位,分别从-50.765 m V减小至-43.538 m V和-44.006 m V;磁化处理降低了赤铁矿颗粒间双电层排斥力,降低颗粒间的势能垒,使赤铁矿颗粒更易于聚团,絮凝效果增强;赤铁矿与淀粉红外光谱研究结果表明,赤铁矿与淀粉分子间存在着化学吸附和氢键作用。