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Q: How does a contaminant such as salt affect the absorption of light by a spectrophotometric sample?
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Q: True-False Only lint-free, optically safe tissue should be used to wipe off microscope lenses.
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Q: microscopy, why are different stains used for different samples? Be specific.
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- True or False: Ultrathin sections are used for light microscopy but are to thin to be stable under an electron mocroscope X-ray beam.Starting from the crime scene, explain the steps you would follow to collect, preserve, and identify fiber evidence. Are fibers classified or individualized? Why?True or false : each objective of a phase contrast microscope contains a phase plate. phase contrast microscopy relies on the condenser to increase the contrast of an image. in brightfield microscopy, closing the condenser aperture will decrease the contrast of the speciment. stained cell speciments are best viewed by phase contrast microscopy.
- If a circular object or specimen extends halfway across the scanning field, what isits diameter in millimeters? ___________What are the underlying physical principles of paper chromatography? What is spectrophotometry, the essence of it?Which of the following is/are source/s of error in performing a spectrophotometric method? Answer all that apply. Sample is turbid when the absorbance is read. The absorbances were read at maximum absorption. Standard solutions are prepared accurately. The cuvettes have fingerprints.
- What is the area of field of view in micrometers on 400x magnification. Please show work.Mesh is the most common unit of measurement used for sieves. It is the number of openings in one linear inch of a sieve. Fill in the table to complete differentiate the different states of powder fineness as to the mesh size. Descriptive Term Mesh Size Opening Size (microns) Mesh Size Number Very Coarse Coarse Moderately Coarse Fine Very FineA nurse is supervising a nursing student preparing to change a sterile dressing. Which step is most important when donning sterile gloves?
- Compare bright-fi eld, dark-fi eld, phase-contrast, confocal, and fl uorescence microscopy as to fi eld appearance, specimen appearance, light source, and uses.True or False: The coarse and fine adjustments are partof the microscope’s mechanical system_________________.What information can be obtained from the slides prepared by the wet mount technique and the hanging mount technique? Give at least three (3) information. What are the limitations of each method (Provide two limitations)