外源褪黑素对干旱胁迫下紫苏种子萌发的影响

以紫苏(Perilla frutescens(L.)Britton)为试材,利用聚乙二醇(PEG-6000)模拟干旱胁迫环境,分析不同浓度外源褪黑素对紫苏种子萌发特征(发芽率、发芽势、发芽指数和活力指数)和幼苗生长(根长、子叶长、子叶宽和鲜质量)的影响。结果表明:干旱胁迫下紫苏种子萌发受到显著抑制,经过不同浓度的外源褪黑素处理后,发芽指标明显上升,其中处理T1(10%聚乙二醇+50μmol·L-1褪黑素)各项指标均达到最大值,发芽率为64.00%,发芽势为43.67%,发芽指数为17.62,活力指数为0.065。外施褪黑素同样可以缓解干旱胁迫下紫苏幼苗的生长,其中处理T3(10%聚乙二醇+300μmol·L-1褪黑素)效果最好,幼苗根长为7.45mm,子叶鲜质量为3.53 mg,长宽比为1.260。表明外施一定浓度的褪黑素能有效缓解干旱胁迫对紫苏种子萌发的影响,为干旱环境下紫苏种植栽培提供了参考依据。     

配电主站边界数据可靠性测试分析

配电主站边界承担着承上启下的作用,是主站不同区域之间、主站与外部不同系统之间进行数据交互的分界点。所以如何保证边界数据的可靠性是配电主站安全运行的基础。1配电自动化系统主站国内现阶段配电自动化系统主站分为Ⅰ区配电网运行监控和Ⅲ区配电网运行状态管控两个大区,Ⅰ区配电网运行监控主要实现配电网的数据采集、操作与控制、拓扑分析、馈线自动化等功能。Ⅲ区配电网运行状态管控主要实现配电网趋势分析、配电终端管理、信息共享与发布等功能。Ⅰ区与Ⅲ区通过电力专用横向单向安全隔离装置隔离,共同组成配电自动化系统主站。配电自动化主站示意图如图1所示。     

Functional porous carbons from waste cotton fabrics for dyeing wastewater purification

A new functional porous carbons (PC-WF) is prepared by activation-pyrolysis method use waste cotton fabrics (WF) as an abundant, cheap and available precursor for removal of Brilliant Crocein (BC-GR) and Cationic Red 2GL (CR-GL) from aqueous phase. The PC-WF was characterized by BET, FTIR, SEM, and XRD techniques, the surface area, total pore volume, average pore diameter was found as 1463.5 m² g^-1, 0.783 cm³ g^-1 and 2.14 nm, respectively. The influences on BC-GR and CR-GL adsorption of various experimental factors such as initial concentration and temperature were investigated. Adsorption kinetics was found to be best represented by the pseudo-second order model. The adsorption capacity was 319.8 mg g^-1 for BC-GR and 842.5 mg g^-1 for CR-GL at 30 °C, respectively. The results indicate that for waste cotton fabrics in particular, the practical application of this process to the production of porous carbon would be possible.