Which statement(s) describe(s) a microplate reader? A. It is spectrophotometer B. It can read the absorbance of one sample with adjustable path length C. It can handle multiple samples in parallel D. It will do all measurement jobs without our supervision a. A & B b. A, B & C c. A, B, C & D d. A e. A & C
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- Which statement(s) describe(s) a microplate reader?
A. It is spectrophotometer
B. It can read the absorbance of one sample with adjustable path length
C. It can handle multiple samples in parallel
D. It will do all measurement jobs without our supervision
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a. |
A & B |
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|
b. |
A, B & C |
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|
c. |
A, B, C & D |
|
|
d. |
A |
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|
e. |
A & C |
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- Identify the FALSE statement about visualization of thin layer chromatography results. A. The spots of colourless compounds are invisible to the eyes. B. These spots can be detęcted by putting the plate under ultraviolet light. C. These spots can be detected by placing the plate in a covered jar containing iodine crystals. D. None of the above. All are true statements.Larger plate height corresponds to which of the following? a. Higher resolution b. Lower resolution c. Slower separation d. Faster separationYour slide is in focus on your microscope,but you do not see the specimen. a.possible problems b. Solutions
- What would be the effect of a thin alumina on the retention, Rf? A.Higher Rf B.Lower Rf C.No effect D.Cannot be determinedParagraph 3. If the ocular lens on a microscope has a magnification of 20OX, what is the total magnification of: a. a scanning lens with magnification of 4X b. a low-power lens with a magnification of 1oX c. a high power lens with a magnification of 40X d. an oil-immersion lens with a magnification of 100X 4. Choose how the letter "R" will appear as viewed under a microscope. R B R As viewed with the naked eye b. a. P. 5. True/False a. Begin the focusing process with the high-power objective. b. Store the microscope with the oil-immersion objective in position. c. Use tissue d. The coarse adjustment knob can be used with any objective lens. раper and water to clean the ocular and objective lenses.As with standard phase contrast microscopy,differential-interference contrast microscopy depends on differences in the ___________________ of a speciment to create high-contrast images. a. refractive index b. light absorption c. natural fluorescence d. walls and coverings e. natural pigmentation
- You have just set your microscope up for use and turn it on. You can not see field of view. a.possible problems b.solutionsWhich of the following specimens cannot be tested on the Velocity Macroscopic Chemistry Module? a. Gross Hematuria b. Specimens <2 mL c. Pyridium d. Diluted Specimens e. All of the aboveIn the spectrofluorometric analysis of quinine, which of the following statements/phrases can be considered a factor level? A. Concentration of 2 ppm of iodide B. Concentration of quenchers C. The use of iodide D. Use of Quenchers
- Give a specific example on how to use spectrofluorometer in Cosmetic Science. Provide a procedure on how to do this example that you provided. Explain the procedure and what data would you gather?a. The scale of a spectrophotometer extends from 1 to 100% T, what are the values of these two extremes in absorbance? b. Convert the 98%T to absorbancePhotoelectric effect increases the _________ in an x-ray image while Compton scattering increases the _________ . Therefore, _________ is not desirable in diagnostic imaging. Select one: a. image noise; radioactivity; photoelectric effect b. image contrast; image noise; Compton scattering c. radioactivity; image noise; Compton scattering d. image noise; image contrast; photoelectric effect