以SPR-1悬浮填料为研究对象,通过低温下的硝化速率试验,考察了不同填充率下悬浮填料的强化硝化效果,并对悬浮填料的最佳填充率进行了分析。结果表明,与不投加悬浮填料相比,当填料填充率为16%和40%时,硝化速率可分别提高28%和71%,硝化效率可分别提高22%和53%;另外,通过对试验数据拟合得到的不同填充率下的硝化速率和强化硝化效率方程,可为污水厂的新建和升级改造工程中悬浮填料的合理经济投加提供理
除磷系统的剩余污泥在浓缩、储存及后续的处理过程中均可能引起磷的释放,释放的磷往往导致正在运行的污水处理厂的磷负荷超标,最终引起出水磷的不稳定排放。针对此问题,在分析生物除磷系统剩余污泥化学特性的基础上,探讨除磷剩余污泥中营养元素的快速释放条件及磷回收效果。采用两个平行反应器,其中一个作为控制反应器,另一个添加表面活性剂十二烷基硫酸钠(SDS),在中温厌氧条件下对剩余污泥进行水解,并对水解产物中的营
以东农50大豆子叶节为材料,以大豆子叶节丛生芽黄化率和丛生芽高度为考察指标,确定氯化锂作为转基因大豆筛选剂的最佳浓度和筛选临界观察时间。在此基础上,对转基因大豆丛生
目的从基因转录水平了解JNK信号通路在大鼠肝再生(LR)和肝硬化(LC)中的作用异同。方法采用2/3部分肝切除手术制备大鼠肝再生模型,以腹腔注射CCl4中性菜籽油溶液法建立大鼠肝
The psychological and neural mechanisms of consciousness are among the most baffling problems in cognitive neuroscience. In this field,visual awareness is a top
A patch clamp chip, as a novel cell-based chip for electrophysiological recordings, has many prominent advantages such as high res-olution, accuracy, high throu
介绍了单片集成MEA系统和用于该系统的神经元信号探测电路和激励电路,基本单元电路是低功耗、低噪声、高增益和小版图尺寸的运算放大器.详细讨论了探测电路、激励电路和基本
Amphioxus appears to lack free circulating blood cells. How it clears invading pathogens from its body remains unknown to date. We demonstrate here that amphiox
The genus Ovatoryctocara Tchernysheva,1962,and its key species Ovatoryctocara granulata Tchernysheva,1962,are revised. Ovatoryctocara granulata occurs near the
The present mini-review describes newer methods and strategies, including transposon and T-DNA insertions,TILLING, Deleteagene, and RNA interference, to functio