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A Turbidity Comparator

 

作者: Richard P. Krebs,   Patricia Perkins,   Alfred A. Tytell,   H. Kersten,  

 

期刊: Review of Scientific Instruments  （AIP Available online 1942）
卷期: Volume 13, issue 5  

页码: 229-232

 

ISSN:0034-6748

 

年代: 1942

 

DOI:10.1063/1.1770018

 

出版商: AIP

 

数据来源: AIP

 

摘要:

An a.c. operated photoelectric turbidity comparator which has been found useful in assaying physiologically active substances by measuring the growth of micro‐organisms is described. A special feature is that the power supply for both the amplifier and the light source is electronically stabilized.

 

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