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Who were the first people to use the Old Testament?
The Hebrew people were the first people to use the old testament.
What is the first civilizationto use zero?
The first civilization to use the concept of zero is the Toltec tribe of Mesoamerica.
Which cultures were the first to use negative numbers?
The first place to use negative integers was China around 200 B.C
What was the first use of the inclined plane?
the egyptions
Who was the first person to use money?
jesus
What method do CSIs use to detect blood?
they use luminol spray and an ultra violet light
Who discovered luminol?
Luminol was discovered by German chemist Heinrich Caro in 1908.
How do you make homemade luminol?
It is much more economical to purchase Luminol from a scientific supply store than to prepare it . The ingredients to make it are expensive and some of them are very difficult to obtain. When handling Luminol wear gloves and protective eye cover. It can cause inflammation to bare skin and eyes. Be sure to follow the manufacturers instruction for use.
How do you make a homemade luminol?
It is much more economical to purchase Luminol from a scientific supply store than to prepare it . The ingredients to make it are expensive and some of them are very difficult to obtain. When handling Luminol wear gloves and protective eye cover. It can cause inflammation to bare skin and eyes. Be sure to follow the manufacturers instruction for use.
The forensic technician at a crime scene has just prepared a luminol stock solution by adding 17.0 of luminol into a total volume of 75.0 of?
The concentration of the luminol stock solution is approximately 22.7 M.
When did luminol start being used for murder investigations?
Luminol was first used for murder investigations in the early 20th century. It was introduced by forensic scientists in the 1930s as a method for detecting traces of blood at crime scenes that may not be visible to the naked eye.
How does temperature affect luminol at a crime scene?
If the temperature is cold then the luminol will have a brighter excited state than if the temperature was hot or room temp.
What is luminol used for in crime scenes?
The basic idea of luminol is to reveal blood traces with a light producing chemical reaction between several chemicals and hemoglobin.
What reacts with the blood to cause luminesce?
Luminol
Explain why ivestigators may spray a crime scene with HCI before using luminol?
Investigators may spray a crime scene with hydrochloric acid (HCl) before using luminol to help remove any potential contaminants or residues that could interfere with the reaction of luminol with blood. This ensures a clean surface for the luminol to detect any hidden blood traces effectively.
Can you buy luminol in a store?
Luminol is a chemical typically available for purchase online or through specialized suppliers that cater to forensic or laboratory needs. It is not commonly found in standard retail stores due to its specific use in detecting blood traces.
Why does the luminol light reaction stop after a period of time?
The luminol reaction is an example of "chemiluminescence". This is when a chemical reaction yields a product in an electronically excited state (at least one electron in the product is at a level above the ground state). The excited product loses energy in the form of a photon of light when the electron drops to the ground state level. In the case of luminol the reaction is an oxidation under alkaline conditions and the reaction stops when either all the luminol, all the oxidising agent or all the alkali has been converted
