For courses in health and physical education, expenses for supplies are qualified expenses only if related to athletics. This deduction is for expenses paid or incurred during the tax year. You claim the deduction on line 23 of Form 1040 (PDF) or line 16 of Form 1040A (PDF).
In astronomy, the term spectrophotometry refers to the measurement of the spectrum of a celestial object in which the flux scale of the spectrum is calibrated as a function of wavelength, usually by comparison with an observation of a spectrophotometric standard star, and corrected for the absorption of light by the Earth's atmosphere.
The spectrophotometer can also be used to measure chemical reaction rates. In this example, absorbance is used to monitor an enzymatic reaction by the disappearance of a reaction intermediate at 452 nm over time. The rate of this enzymatic step can be calculated by fitting the data to the appropriate equation.