等离子体活化水对蛋白核小球藻和小球藻生长的影响
The role of plasma-activated water on the growth of freshwater algae Chlorella Pyrenoidosa and Chlorella Sorokiniana
摘要：
在目前的工作中，我们进行了两项研究。在第一项研究中，我们研究了等离子体活化水（PAW）在藻类生长抑制中的作用，在第二项研究中，努力了解PAW作为氮源对藻类生长促进的作用。本研究选择了两种淡水藻类，分别命名为蛋白核小球藻（Chlorella Pyrenoidosa）和索罗克小球藻（Chlorella Sorokiniana）。PAW是使用笔形等离子体射流和空气作为等离子体形成气体制备的。等离子体的特征在于电气和识别等离子体中产生的物种进行使用光发射光谱。该研究清楚地表明，氧化性更强的PAW具有杀藻效果。与对照相比，用两种藻类物种进行的PAW处理显著降低了它们的生长。此外，PAW处理后藻细胞形态出现损伤，细胞结构发生断裂。在第二项研究中，使用反应性较低的PAW（低氧化电位）作为Bolds基础培养基中的氮替代物。与对照相比，PAW生长的蛋白核小球藻和小球藻Sorokiniana显示出更高的生长。此外，与对照相比，观察到更高浓度的叶绿素a和b、糖和蛋白质。此外，我们观察到较低的抗氧化酶活性的PAW生长的藻类相比，控制。总之，PAW具有杀藻效果，并且可以用作水产养殖中的氮源以促进藻类生长。
英文摘要：
In the present work we have conducted two studies. In the first study, we investigated the role of plasma-activated water (PAW) in algae growth inhibition and in the second study, efforts are made to understand the role of PAW as a nitrogen source for algae growth enhancement. Two freshwater algae species are selected for the present study named Chlorella Pyrenoidosa and Chlorella Sorokiniana. The PAW is prepared using a pencil plasma jet and air as a plasma forming gas. The plasma is characterized electrically and identification of generated species in plasma is carried out using optical emission spectroscopy. The study clearly indicated that more oxidizing PAW exhibits algicidal effect. The PAW treatment with both the algae species substantially decreased their growth compared to control. Moreover, the morphology of algae cells showed damage and cells structure get ruptured after PAW treatment. In the second study, a less reactive PAW (low oxidizing potential) used as a nitrogen replacement in Bolds Basal Medium. The PAW-grown Chlorella Pyrenoidosa and Chlorella Sorokiniana showed higher growth compared to control. Also, a higher concentration of chlorophyll a and b, sugar, and protein observed compared to control. Further, we observed lower antioxidant enzymatic activities in PAW-grown algae compared to control. In conclusion, the PAW has algicidal efficacy as well as can be used as nitrogen source in aquaculture to enhance algae growth.
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