Resistance to maize southern leaf spot disease was induced by the low-concentration filtrate of Bipolaris maydis race T cultivation in an experiment. The nuclear neterogeny corn C103 was used as the test material. The...Resistance to maize southern leaf spot disease was induced by the low-concentration filtrate of Bipolaris maydis race T cultivation in an experiment. The nuclear neterogeny corn C103 was used as the test material. The lesion area on the leaves was significant difference by connalysis. The lesion areas on pretreated leaves were （0.3±0.05）- （0.9±0.5） mm^2, but those on the control were （23.1±8.7） mm^2. At the same time, the changes in peroxidase, phenylalanine, ammonialyase, and malondialdehvde activities were determined. During 0-96 h of inspection, phenylalanine and ammonialyase （PAL） activities increased by 64.2%, peroxidase （POD） activities increased by 41.2%, but the malondialdenvde （MDA） content decreased by 29.7% compared with the control. It seems that the low-concentration filtrate of Bipolaris maydis race T cultivation itself can be used as an elicitor to enhance the induced resistance.展开更多
利用浓度分别为15%和8%的二醋酸纤维素纺丝液,采用静电纺丝的方法在商业聚对苯二甲酸乙二酯(PET)非织造布表面同时复合沉积纳米纤维/串珠纤维混合均匀的纤维膜,并在纤维膜上再覆盖一层PET无纺布,制备了复合过滤材料。研究了纤维形貌对...利用浓度分别为15%和8%的二醋酸纤维素纺丝液,采用静电纺丝的方法在商业聚对苯二甲酸乙二酯(PET)非织造布表面同时复合沉积纳米纤维/串珠纤维混合均匀的纤维膜,并在纤维膜上再覆盖一层PET无纺布,制备了复合过滤材料。研究了纤维形貌对复合过滤材料过滤性能的影响,并分析了复合时间、复合电压和纳米纤维/串珠纤维纺丝液供液比对复合过滤材料过滤性能的影响。结果表明,在纳米纤维中加入串珠纤维有利于在保证过滤效率的前提下降低过滤阻力;随着复合时间的增加,过滤阻力先缓慢增长而后迅速增加,过滤效率则先迅速上升而后缓慢增加;随着复合电压的增加,过滤阻力有所下降而过滤效率变化不大,当复合电压增加到24 k V时,过滤效率得到提升但同时过滤阻力大幅增加;随着串珠纤维含量的增加,过滤效率和阻力总体上呈先下降后增大的趋势。当复合时间为60 min,复合电压为22 k V,纳米/串珠纤维供液比为10∶5时,所制备的复合过滤材料的过滤阻力仅为115 Pa,对0.5μm以上微粒的过滤效率达到96%以上。展开更多
文摘Resistance to maize southern leaf spot disease was induced by the low-concentration filtrate of Bipolaris maydis race T cultivation in an experiment. The nuclear neterogeny corn C103 was used as the test material. The lesion area on the leaves was significant difference by connalysis. The lesion areas on pretreated leaves were （0.3±0.05）- （0.9±0.5） mm^2, but those on the control were （23.1±8.7） mm^2. At the same time, the changes in peroxidase, phenylalanine, ammonialyase, and malondialdehvde activities were determined. During 0-96 h of inspection, phenylalanine and ammonialyase （PAL） activities increased by 64.2%, peroxidase （POD） activities increased by 41.2%, but the malondialdenvde （MDA） content decreased by 29.7% compared with the control. It seems that the low-concentration filtrate of Bipolaris maydis race T cultivation itself can be used as an elicitor to enhance the induced resistance.
文摘利用浓度分别为15%和8%的二醋酸纤维素纺丝液,采用静电纺丝的方法在商业聚对苯二甲酸乙二酯(PET)非织造布表面同时复合沉积纳米纤维/串珠纤维混合均匀的纤维膜,并在纤维膜上再覆盖一层PET无纺布,制备了复合过滤材料。研究了纤维形貌对复合过滤材料过滤性能的影响,并分析了复合时间、复合电压和纳米纤维/串珠纤维纺丝液供液比对复合过滤材料过滤性能的影响。结果表明,在纳米纤维中加入串珠纤维有利于在保证过滤效率的前提下降低过滤阻力;随着复合时间的增加,过滤阻力先缓慢增长而后迅速增加,过滤效率则先迅速上升而后缓慢增加;随着复合电压的增加,过滤阻力有所下降而过滤效率变化不大,当复合电压增加到24 k V时,过滤效率得到提升但同时过滤阻力大幅增加;随着串珠纤维含量的增加,过滤效率和阻力总体上呈先下降后增大的趋势。当复合时间为60 min,复合电压为22 k V,纳米/串珠纤维供液比为10∶5时,所制备的复合过滤材料的过滤阻力仅为115 Pa,对0.5μm以上微粒的过滤效率达到96%以上。
