Biomedical Instrumentation Systems
1st Edition
ISBN: 9781133478294
Author: Chatterjee
Publisher: Cengage
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Question 20
Which of the following is false?
Lemons reflect large amounts of light from the red part of the spectrum.
If the "red" cones are stimulated, the perceiver will see red.
Cones, one kind of human photoreceptor, are used in color vision.
The light reaching the eye from an object depends on its reflectance and the illuminant.
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1. Write a report comparing the principles, limitations/capabilities of the following microscopic techniques. (a) Optical Microscopy(b) Scanning Electron Microscopy(c) Transmission Electron Microscopy(d) Atomic Force Microscopy
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- A sample is dissolved in water and analyzed using spectrophotometry. The sample shows an absorbance peak at a wavelength of 486 nm. Which one of the following adjustments would increase the absorption at that wavelength? O Diluting the sample with additional water. O Evaporating some of the water from the sample. Decreasing the path length, b. the light takes through the sample. Re-measuring the absorbance of the blank (water).arrow_forwardCES Practice, Question 05 X Your answer is incorrect. Try again. Select ALL the correctly matched terms: O Immersion oil/ Oil with a different refrative index than air, used to enhance magnification O Luminescence/ Absorption of light and energy within a sample O Fluorescence/ Absorbed light rays are changed into longer wavelengths and re-emitted O Diffraction/ Bending of light rays around an opening 6 LINK TO TEXT 8 20 study 1 T四 24 MacBook Proarrow_forwardQuestion 22 A solution containing two different fluorescent compounds, Ben and Jerry, were analyzed for their individual concentrations in the mixture. Standards of pure Ben and pure Jerry were prepared at a concentration of 500.0 mM and were run in a UV-Vis Spectrophotometer to determine their absorption properties. Absorbance Wavelength Compound Ben 500 mM Compound Jerry 500 mM 400 nm 0.137 0.136 450 nm 0.312 0.113 500 nm 0.154 0.078 550 nm 0.076 0.079 600 nm 0.227 0.148 650 nm 0.230 0.230 700 nm 0.151 0.357 750 nm 0.157 0.246 800 nm 0.154 0.154 A standard curve of the standards was also prepared to help determine the concentration of each component in the solution. The solution produced an absorbance reading of 0.486 at the Amax of Ben, and 0.463 at the Amax of Jerry. STD CURVE BEN Amax Jerry Amax Jerry Лтax Ben STD CURVE JERRY Aтax Ben CONC (mM) ABS ABS CONC (mM) ABS ABS 100 0.074 0.025 100 0.037 0.074 200 0.148 0.057 200 0.081 0.148 400 0.284 0.103 400 0.164 0.284 800 0.607 0.218…arrow_forward
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