Examples of using Luminol in English and their translations into German
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Political
It's luminol.
Did you buy something called luminol?
Box 1: Luminol, a glow-in-the-dark chemical.
Bleach lights up under luminol, same as blood.
A longer video showing how to make luminol.
The oxidation of luminol occurs in several steps.
However, it is strongly recommended to use an airbrush for spraying luminol.
Finally, the very act of spraying luminol onto the stain could make it smear or run.
We used luminol and found traces of blood in Mr. Stokes' shower, even though it had been heavily bleached.
 Blood traces, even very diluted ones,cause the luminol and the hydrogen peroxide in the solution to react with each other.
Luminol begins as a powder that is mixed with hydrogen peroxide before being applied to the surface being tested.
This is especially true when working with fabrics carrying diluted bloodstains,which could easily be affected by the addition of liquid luminol.
Unfortunately, luminol can react with other substances besides iron, causing a false positive.
When investigators in a TV crime series need to find evidence of blood,the first thing they do is spray the area with luminol and shut off the lights.
As Dr. Myrick explains, luminol"will react with horseradish, it will react with copper salts, it will react with bleaches….
Based on Myrick's results,thermal imaging may be a viable alternative to luminol when determining whether fabric has been stained with blood.
Plus, unlike luminol-which fades almost immediately- they discovered water vapor had a lasting effect on bloodstained fabric.
They notice several stained indentations in the linoleum floor and begin their testing with luminol, a chemical used to indicate the possible presence of blood.
A mixture of luminol in a dilute solution of hydrogen peroxide is sprayed onto the area where the forensic scientists suspect that there is blood.
Figure 4: Haem group in haemoglobin The iron atom(Fe)in the centre of the porphyrin ring catalyses the reaction of luminol Image courtesy of Chemistry Review.
Apparently, LCV can also be used after luminol[1], however it first needs fixing with 2% sulfosalicylic acid otherwise leaching with loss of detail occurs.
If there is blood present,the iron in the hemoglobin will catalyze a reaction between the luminol and hydrogen peroxide, releasing electrons as visible photons of blue light.
Another issue with luminol is its potential effect on DNA testing: while the chemical doesn't outright destroy DNA, it may affect some genetic markers.
Chemiluminescence in forensics Figure 4: Haem group in haemoglobin The iron atom(Fe) in the centre of the porphyrin ring catalyses the reaction of luminol Image courtesy of Chemistry Review Forensic scientists use the reaction of luminol to detect blood at crime scenes.
One of the drawbacks of using luminol is that the reaction can be catalysed by other chemicals that may be present at the crime scene, for example, copper-containing alloys, some cleaning fluids such as bleach, and even horseradish.
Figure 3: Reactions leading to the emission of light from luminol Tautomers are molecules with the same molecular formula, but different arrangements of atoms or bonds.
Although the reactions of luminol and luciferin are different- the oxidation reaction of luminol is catalysed by potassium ferricyanide rather than by an enzyme(for more details, see Welsh, 2011)- the result is the same: luminescence.
Mixing a small amount of fluorescein or reduced fluorescein with the luminol working solution will give a green fluorescence(peak emission around 520 nm) instead of a blue-white one and is reported to be actually stronger than that of luminol alone.
In another experiment, iron as a catalyst in a mixture of luminol and hydrogen peroxide produced fluorescent colors- the shimmering blue initial liquid flowed through three valves and became neon yellow, pink and green in the collecting containers.