| 单词 |
densitometry |
| 释义 |
densitometry, n.|dɛnsɪˈtɒmɪtrɪ|
[f. densitometer n.: see -y3.]
The measurement of the darkness or opacity of a substance or specimen; analysis or investigation by means of this.
1925Jrnl. Optical Soc. Amer. X. 160 Gibson has used the photoelectric cell in transmissionometry, where the requirements are very similar to those of densitometry. 1942C. E. K. Mees Theory Photogr. Process iv. xvii. 663 The barrier layer, self-generating, photoelectric cell introduced a new factor into physical densitometry. 1976C. Reynolds Photoguide to Filters 191 Colour densitometry works by measuring the density (consecutively or simultaneously) through three primary filters. The balance between the three readings is a measure of the colour. 1978Nature 16 Mar. 255/2 Microinjected N1 and N2 were found to be at least 120 times more concentrated in the nucleus than in the cytoplasm. (This was determined by densitometry of the gels.) 1989Brit. Med. Jrnl. 3 June 1467/1 Identifying women most at risk is best achieved by bone densitometry.
So densitoˈmetric a.
1924Trans. Soc. Motion Picture Engineers xvii. 154 The use of bar photometers for densitometric work. 1971Physics Bull. Aug. 482/2 The resulting information is digitized in the form of 650 000 picture points; these are analysed by a special purpose computer which provides geometric and densitometric data describing the image. 1981Jrnl. Protozool. XXVIII. 371/1 Densitometric estimation. |
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