Fine-Structure Measurements of Oxygen A Band Absorbance for Estimating the Thermodynamic Average Temperature of the Earth's Atmosphere. An Experiment in Physical and Environmental Chemistry

Abstract

The rotational fine structure observable in a forbidden electronic absorbance of diatomic oxygen in the earth's atmosphere can be observed as a series of minima in the solar spectrum near 762 nm wavelength. The relative intensities of these rotational fine-structure lines can be used quantitatively to estimate the average temperature of the atmosphere along the path taken by sunlight to the observer. Measured values for temperature vary from day to day and season to season and are generally far lower than ambient temperatures because of averaging over the depth of the atmosphere. These experimentally determined thermodynamic temperatures can be compared to Web-based atmospheric models for particular locations and times to illustrate the fact that they are average values.

In Vitro Cytotoxicity Test of Nano Silver Medical Devices

“…Where: A is the average absorption value of the sample group in the test, B is the average absorption value of the blank control group, and C is the average absorption value of the Triton X-200 control group [14][15].…”