Q: Explain the Radioisotopes.Give their therapeutic / Diagnostic Applications ?
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Q: What Form of energy is present in UV radiation ?
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Q: Define Casparian strip
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Q: Why might Gamma irradiation be considered better than using UV radiation?
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At which wavelength is UV radiation most germicidal? Explain.
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- Why do some materials exhibit fluorescence when exposed to ultraviolet light?Explain why the fluorescence signal decreases as the concentration of TNT in the sample increases.What wavelength is most suitable for quantitative analyses for an analyte exhibiting the UV-Vis Spectrum shown below (which has an interfering analyte with the spectrum shown in a dashed line)? Explain why? 1.0r A B F 0.75- C 0.50 E 0.25 350 400 450 500 550 600 650 Wavelength, nm Figure 3-19 Choice of experimental wavelength. Solid line: measured species. Dashed line: interfering species. See text for delails. Absorbance
- 11.3 a). What is the unit used for measuring ozone layers? b). What is the wavelength range of the UV radiation? c). How is ozone different from oxygen? d). When CFCs are exposed to UV or sun light, what species are produced? e). What is the role of chlorine radical in the ozone formation or reactions. f). What in the polar zone makes the depletion of ozone more serious?The wavelength for cobalt (II) chloride is set to 549 nm. Why is this wavelength being used?b) Consider the quenching of an organic fluorescent species with 70 = 6.0 ns and ką = 3.0×10° dm³ mol-1 s-1. Predict the concentration of quencher required to decrease the fluorescence intensity of the organic species to 50% of the unquenched value.
- The Cavity Ring-Down Spectroscopy (CRDS) technique offers greater sensitivity compared to other conventional spectroscopy techniques. Explain the underlying mechanism of this.Assume that you list the following types of electromagnetic radiation in order of increasing wavelength: () the gamma rays produced by a radioactive nuclide used in medical imaging: (ii) radiation from an FM radio station at 93.1 MHz on the dial; (iii) a radio signal from an AM radio station at 680 kHz on the dial; (iv) the yellow light from sodium vapor streetlights; (v) the red light of a light-emitting diode. Which one would be the second? Lütfen birini seçin: O a 680 kHz AM radio waves O b. the red light O c the yellow light O d. 93.1 MHz FM radio waves O e the gamma raysExplain how the type of decay, the half life and the chemical properties make the following radionuclides suitable for the given applications: A single gram of polonium will reach a temperature of 500°C making it useful as a source of heat for space equipment (α emitter, half lives of polonium isotopes range from less than a second to 200 years).
- Sulfamethoxazole is a type of sulfonamide antibiotic. Its absorbance ranges from 250-300 nm in a UV spectrophotometer, which tells that it is in the UV region. What characteristic/s of sulfamethoxazole is responsible for the absorbance in the UV region? Please answer in detail and clearly. Thank you!Define Casparian strip“Atomic absorption spectroscopy (AAS) and UV-Vis spectroscopy is similar in principles”. Do you agree with this statement? Explain briefly.