The +17 is referring to the number of protons within the atom. The minus signs with circles around them represent electrons orbiting the nucleus.
Answer:
Bioluminescence Imaging.
Explanation:
Bioluminescence is appealing as an approach for in vivo optical imaging in mammalian tissues because these tissues have low intrinsic bioluminescence; therefore, images can be generated with remarkably high signal-to-noise ratios. A variety of different bioluminescent systems have been identified in nature, each requiring a specific enzyme and substrate. Although the most commonly used bioluminescent reporter for research purposes has been luciferase from the North American firefly (Photinus pyralis; FLuc), useful luciferases have also been cloned from jellyfish (Aequorea), sea pansy (Renilla; RLuc), corals (Tenilla), click beetle (Pyrophorus plagiophthalamus), and several bacterial species (Vibrio fischeri, V. harveyi).
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The time measured by a stopwatch is not an exact number. The number is limited by the precision of the instrument (the stopwatch) and it migh have been 56.004 instead of 56.00, and the stopwatch cannot shoe that. So, this is not an exact number.
On the inside of the refrigerator door are NOT required Permanent safety markings
<u>Explanation:</u>
Normally in red color the Permanent safety markings arre done. That are wanted on household refrigerators that accept any refrigerant with an A3 flammability grade such as HCs, on or near any evaporators, any exposed refrigerant tubing, near the machine compartment, and on the exterior of the refrigerator.
Each of these markings shall be in words no short than 6.4 mm (1/4 inch) long. Room residents should remove the place quickly regarding the unexpected release of this refrigerant. "DANGER—Risk of Fire or Explosion. Flammable Refrigerant Used. To Be Repaired Only By Trained Service Personnel. Do Not Puncture Refrigerant Tubing.” is the quote to be marked in the above specified places.