1. Even fraction of a second, the optical density of the nucleus is measured and stored in the computer's memory.

2. This increased optical density caused by a disassociation or melting of the DNA is called hyperchromicity.

3. An optical density curve model for optimizing the dye coating process of recordable disc is introduced.

4. METHODS: The PAEs were determined by the optical density method using AVANTAGE Microbiology System.

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5. An apparatus for measuring the optical density of a material, such as a photographic negative.

6. The methods for macular pigment optical density ( MPOD ) measurement in recent years were summarized.

7. The duration of PAE was determined by the optical density method.

8. Result: XST injection could reduced nerve cell apoptosis, and the intergral optical density of the apoptotic.

9. Once again, illustrators exposure sites in order to achieve the optical density at least version 4.00.

10. We have made benefic trials on the research of optical limiting materials with abroad protective wavelength, high optical density and high transmission.