Answer: First answer is D- Fluorescent.
Second Answer is B- Asphyxia
Third answer is C- Thin layer chromatography and Infra Spectrometry.
Explanation:
Fluorescent powders for forensic use are developed to be used with a variety of light sources especially ultraviolet lights and are used to extract latent prints from dark surfaces and multicoloured surfaces where the prints and the surfaces and indistinguishable. They are also good for extracting latent prints from wooden surfaces. When applied, the hues of the fluorescent powder can be matched to the colour of the surfaces and the wavelength of the light source will be used. This way, it eliminates any background interference that may occur from the surface colour during extraction of latent print.
In forensic investigation, a cause of death means the injury or disease that lead to death. Asphyxiation is a condition where the body experiences insufficient supply of oxygen to continue its normal function. Common causes of asphyxia are choking, suffocation, drowning and strangulation. In general, for asphyxiation to occur, something physical is blocking the airways or lungs from receiving sufficient oxygen.
Thin layer chromatography is an economical and efficient technique used in separating mixtures of solids and liquids that are non-volatile in nature. It is used to separate compounds in a mixture. Infra red spectrometry is the interaction of infrared radiation with matter. It is used to study chemical substances of solid, liquid and gas. Thin layer chromatography and infra red spectrometry are good complements which are useful in analytical and research laboratories for analyzing molecules and different compounds especially for diverse complex researches.
