【摘 要】
：
To investigate the effect of neodymium (Nd) on Microcystis aeruginosa, the growth and physiological changes were studied by lab cultured experiments. The result
【机 构】
：
College of Resources and Enviroment,Environmental Protection Agency of Wuxi
论文部分内容阅读
To investigate the effect of neodymium (Nd) on Microcystis aeruginosa, the growth and physiological changes were studied by lab cultured experiments. The results showed that the content of chlorophyll a (Chi-a), soluble protein and the activity of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) increased compared with the control (Nd3+-free), and the growth of M. aeruginosa was stimulated in the treatments of initial Nd3+ concentration ≤1 mg/L; while the treatments of initial Nd3+ concentration was in the range of 5.00-10.00 mg/L, the content ofmalondiadehyde (MDA) increased immediately but the activity of CAT reduced, which resulted in weakened M. aeruginosas ability to eliminate the active oxygen and the ruin of antioxidant defense system, and stunting the growth ofM. aeruginosa.With the initial Nd3+ concentration of 50 mg/L, the growth of M. aeruginosa was totally stunted. The ultrastructure showed that excess Nd3+ could lead to the decrease of thylakoid and the increase of fat particle in cells of M. aeruginosa, and the cell membrane became rough and even broken, causing an irreversible damage to algal cells.
其他文献
Geopolymers are three-dimensional aluminosilicates formed in a short time at low temperature by geopolymerization. In this pa-per, alkali-activated foam geopoly
以三维荧光光谱技术结合PARAFAC算法研究了水中油浓度的快速测量方法,重点分析了水中溶解有机物对油浓度测量的影响。以0#柴油、腐殖酸为测量样本,通过改变腐殖酸浓度来模拟自然水体中溶解有机物含量,研究了腐殖酸中0#柴油特征荧光光谱的快速分离方法,实现了不同腐殖酸浓度下相同浓度0#柴油含量的测量,测量平均误差为1.67%,相对标准偏差小于1.29%。结果表明,以三维荧光光谱技术结合PARAFAC算法
研究了石墨炉原子吸收法(GF-AAS法)测定一级处理污水灌溉土壤中铅最佳基体改进剂的选择及在最佳改进剂条件下测定污水灌溉土壤中铅的GF-AAS法.试验了磷酸二氢铵,磷酸铵,氯化
Ca-α/β-SiAlON composites were prepared using Ca-α/β-SiAlON powder synthesized from gold ore tailings,which contained abundant Si and Al elements as the majo
A lanthanum glutamic dithiocarbamate(La-GDTC) was synthesized. The vulcanization kinetic and crosslinking structure of styrene butadiene rubber (SBR)/La-GDTC/si
Steel rebar normally forms an oxide or rusty skin before it is embedded into concrete and the passivation properties of this skin will be heavily influenced by
In recent years, the increasing application of nonlinear and unbalanced electronic equipment and large single phase loads have made voltage imbalance a serious
In the interest of accelerating aniline degradation, Fe2+and chelated Fe2+activated persulfate oxidations were investigated in neutral pH condition. Three kinds
The properties and feasibility of L-band differential InSAR for detecting and monitoring mining-induced subsidence were systematically analyzed and demonstrated