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1)  Concentration of Pb in nutrient solution medium
外界铅浓度
2)  Concentration of lead
低浓度铅
3)  lead concentration
铅污染浓度
1.
Meteorological factors influencing lead pollution in the air in Gejiu are demonstrated,based on which,the variation rules of lead concentration in the air are pointed out for controlling lead pollution.
叙述了个旧市环境空气中影响铅污染浓度的气象因素,铅污染度的变化规律,为治理铅污染提供一些科学依据。
4)  low level of blood lead
低浓度血铅
5)  interfacial concentration
界面浓度
1.
The computational results show that the interfacial concentration of absorbed component on liquid side is strongly affected by a B.
界面浓度是与Yo和液相主体浓度密切相关的。
6)  Critical concentration
临界浓度
1.
The effects of electrolyte (different types and different ion strength) on critical concentration (C *) of the chitosan and N alkyl chitosan liquid crystalline in formic acid solutions were studied.
研究了壳聚糖以及N 烷基壳聚糖的甲酸浓溶液中添加不同类型、不同离子强度的小分子电解质时溶致液晶临界浓度 (C )的变化规律。
2.
Critical concentration(c  )of the samples were measured by polar optical microscopy(POM).
结果表明:同一碳链长度时,取代度对临界浓度的影响不大;而当取代度相近时,随着碳链长度增加,临界浓度也随之增大。
补充资料:铅-铅测年
分子式:
CAS号:

性质:238U和235U两个母体铀同位素的特性实质相同,所产生的放射性成因206,207Pb的方程可合并为(207Pb/206Pb)=[(235U/238U)](t-1)。235U/238U现在的比值是1/137.8,利用非放射性成因‘稳定’204Pb作为参考同位素,作(207Pb/204Pb)与(206Pb/204Pb)的Pb-Pb等时线,应用方程计算年龄,式中(207Pb/204Pb)和(206Pb/204Pb)0是初始比值。

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