Yes UV light can be used as a disinfectant in hospitals for sanitization or for purifing of the water. It primarily works by destroying the DNA inside the bacteria, viruses and fungi. They are specially used for killing the Clostridium difficile, which is major source of hospital acquired infections.
4.- (1 pt.) Can UV light be used as a disinfectant, an antiseptic, and or a...
1. Ultraviolet (UV) light can be used to estimate protein solution concentrations because a.glycine absorbs at 260 nm b.All the amino acids absorb UV light c.Alanine amino acids absorb at 280 nm d.Tryptophan and tyrosine absorb at 280 nm e.All of the above 2. Which statement is not true about the peptide bond? a.The peptide bond has partial double-bond character b.The peptide bond is longer than the typical carbon-nitrogen bond c.Rotation is restricted about the peptide bond d.The carbonyl oxygen...
Mercurochrome is a complex organic derivative of mercury and was formerly used as an 4. antiseptic. Why does mercurochrome kill bacteria? 5. Explain why the type of milk used in the isolation of casein determines whether ethanol needs to be used as a rinse solution.
1. Define the difference between sterilization and disinfection. 2. Define the difference between a disinfectant and an antiseptic. 3. List one chemical and one physical method of disinfection. 4. List two areas or items that would need to be sterilized. 5. Gram negative and gram positive organisms have different sensitivities to disinfectants and antiseptics. Explain why.
(c) Tryptophan can absorb UV light around 280 nm and fluoresces around 355 nm. Explain why the fluoresced light is of a longer wavelength than the light absorbed. Include an energy level diagram to illustrate your answer. 14 marks
please answer 1-4 &6
Questions The energy of UV light is 70 kcal/mole at 400 nm and 140 kcal/mole at 200 nm. Why is UV radiation damaging to the eyes and skin? (Hint: Think about the energy required to break a C-C bond.) 2. Which is more energetic: 235 nm or 325 nm light? Explain. 3.) Why is UV spectroscopy used more frequently in organic chemistry than visible spectroscopy? 4. Using the structure of methyl orange as an example, draw...
UV light is used in clean rooms and some operating rooms. What are the limitations of using UV light as a means of sterilization? For the toolbar, press ALT+F10 (PC) or ACT+FN+F10 (Mac).
and Lab Exer n this experiment you will evaluate effect of UV light on bacterial growth. UV light affects growth by interfering with DNA, resulting in thymine dimer formation. The dimerization is confined within adjacent thymine residues on same strand (intrastrand ). These dimmer lesions have consequence on DNA functions including interference in DNA replication, transcription etc, so UV exposure of cells can lead to lethal effects for bacterial multiplications. This forms the basis for UV method to control bacterial...
Which is the light we can see UV light infrared visible spectrum both a and b
4.Which antiseptic may be used as a surgical scrub and a teat dip? A.Chlorhexidine B.Formaldehyde C.Betadine D.Alcohols
Lab
Report 16:
Control of Microbial Populations: Effect of Chemicals
Question# 2,3,& 4.
What was the purpose of this lab exercise? 1. 2. Complete the following table with your observations Name of the bacterium Zone of inhibition Comments Disinfectant / Antiseptic 3. Name the chemical that inhibited both the bacteria tested Date: Name Lab Report 16: Control of Microbial Populations: Effect of Chemicals What was the purpose of this lab exercise? 1. Complete the following table with your observations: 2....