ISSN:0034-6748    

DOI:10.1063/1.1769958

出版商:AIP    

年代:1942

数据来源: AIP

摘要:

An inexpensive monochromator, capable of giving high intensity in the near ultraviolet, is described. Its distinguishing feature is a large water prism with quartz sides. This prism has an internal reflection so that the beam always comes through it at minimum deviation, and gives straight undistorted spectral lines at the exit slit.

ISSN:0034-6748    

DOI:10.1063/1.1769959

出版商:AIP    

年代:1942

数据来源: AIP

摘要:

An investigation of the working conditions of an infra‐red spectrometer of the recording type has resulted in techniques of operation which have increased the precision of the measurements attainable and has permitted an appraisal of the magnitudes of the variations in the resulting data which may still be expected. Included in this study is the remeasurement of the fine structure of certain of the absorption bands of CO2, NH3, and H2O. Measured with a grating instrument whose resolution was made to equal that of the prism instrument in each case, these data give 150 sharp absorption lines between 5&mgr; and 15&mgr; suitable for an empirical calibration of great accuracy.

ISSN:0034-6748    

DOI:10.1063/1.1769960

出版商:AIP    

年代:1942

数据来源: AIP

摘要:

A description is given of two types of stationary platinum microelectrodes which electrolyze dissolved oxygen when suitable potentials are applied. With these electrodes it is possible to measure the oxygen tension in an open solution, and especially, to estimate local oxygen tensions in animal tissues. Electrodes have been constructed which can indicate oxygen tension as a function of position with a spatial resolution of 25 microns. One type of electrode, with the end of the platinum wire recessed inside the cylindrical glass tip, can be used to measure absolute oxygen tensions as often as once every five minutes. The other, an open type, with the end of the wire directly exposed to the outer medium, allows the estimation of relative oxygen tensions only, but gives continuous readings, and is useful for recording rapid changes of tension.

ISSN:0034-6748    

DOI:10.1063/1.1769961

出版商:AIP    

年代:1942

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1769962

出版商:AIP    

年代:1942

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1769964

出版商:AIP    

年代:1942

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1769965

出版商:AIP    

年代:1942

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1769966

出版商:AIP    

年代:1942

数据来源: AIP

ISSN:0034-6748    

DOI:10.1063/1.1769968

出版商:AIP    

年代:1942

数据来源: AIP