重金属生物效应热化学研究──I .4种重金属离子对丝状真菌生长抑制作用  

Thermochemical Studies of Bioeffect of Heavy Metal I.The Inhibition of Four Kinds of Heavy Metal Ions on Filamentous Fungi

作　　者：颜承农[1,2] 刘义[1,2] 俞芸 望天志[1,2] 宋昭华 屈松生[1,2] 

机构地区：[1]武汉大学 [2]荆州师范高等专科学校化学系

出　　处：《武汉水利电力大学学报》1997年第5期108-110,共3页Engineering Journal of Wuhan University

基　　金：国家自然科学基金

摘　　要：用微量热法研究了４种重金属离子对丝状真菌（黑根霉菌）生长抑制的热功率输出曲线，得到了它在不同浓度重金属离子作用下的生长速率常数ｋ、抑制率Ｉ、半抑制浓度ＩＣ５０等参数，其抑制顺序为：Ｃｄ２＋＞Ｈｇ２＋＞Ｐｂ２＋＞Ｃｕ２＋．By using microcalorimetric method, the growth thermogenetic curves of Rhizopus nigricans inhibited by four kinds of heavy metal ions are determined, parameters such as growth rate constants k, inhibitory ratio I, and half inhibitory concentration IC 50 etc.are obtained. The experimental results show that four kinds of heavy metal ions can inhibit Rhizopus nigricans growth obviously, low concentration of Cu 2+ has promoting action. The inhibitory sequence is Cd 2+ > Hg 2+ > Pb 2+ > Cu 2+ , half inhibitory concentration of them are Cd 2+ 0.8μg\5ml -1 , Hg 2+ 1.7μg\5ml -1 , Pb 2+ 48.0μg\5ml -1 , Cu 2+ 110.0μg\5ml -1 .

关 键 词：微量热法 重金属离子 生物效应 热化学 真菌生长 

分 类 号：O614.121[理学—无机化学] Q939.504[理学—化学]