【摘要】 以小新月菱形藻为实验对象,从化学角度研究了加入高浓度一氧化氮(nitric oxide,NO)对其生长的影响。结果表明:(1)一次性加入不同浓度NO时,1.4μmol/L NO对微藻生长有促进作用;7,14,28和42μmol/L的NO对微藻生长起抑制作用,并且NO浓度越大,抑制作用越明显。(2)每天一次加入不同浓度NO时,1.4~42μmol/L的NO对微藻生长起不同程度的抑制作用,且微藻生长周期缩短。藻的生长曲线由S型变成峰型;加入42μmol/L NO,在100 h内完全抑制了微藻的生长。(3)通过进一步检测外加NO在藻液中的浓度变化,结果表明采用2种不同加入方式时,1.4μmol/L NO对藻生长分别起促进和抑制作用,这是由于NO的不断衰变造成的。更多还原

【Abstract】 This paper studies the effects of high concentration nitric oxide(NO) on the growth of Nitzschia closterium f.minutissima in chemistry.The resuets showed that(1) When adding NO only once,1.4 μmol/L NO promoted the growth of Nitzschia closterium f.minutissima.,whereas 7,14,28 and 42 μmol/L NO inhibited the microalgae growth.(2) When adding NO once a day,1.4～42 μmol/L NO inhibited the growth of microalgae to different extents.The S-curve of algae growth was transformed to a double-peak curve.42 μmol/L NO completely inhibited the microalgae growth in 100 hours.(3) The concentration change in f/2 was detected after the addition of 1.4 μmol/L NO.Because the NO concentration continuously decreased,1.4 μmol/L NO could promote or inhibit the microalgae growth,depending on how it was added.更多还原