what do white spots on the nails indicate
Leukonychia Leukonychia (or leuconychia), also known as white nails or milk spots,[1] is a medical term for white discolouration appearing on nails.[2]:658â€“9 It is derived from the Greek words leuko ("white") and nychia ("nails"). The most common cause is injury to the base of the nail (the matrix) where the nail is formed.
Fingerprint Since the late nineteenth century, fingerprint identification methods have been used by police agencies around the world to identify suspected criminals as well as the victims of crime. The basis of the traditional fingerprinting technique is simple. The skin on the palmar surface of the hands and feet forms ridges, so-called papillary ridges, in patterns that are unique to each individual and which do not change over time. Even identical twins (who share their DNA) do not have identical fingerprints. The best way to render latent fingerprints visible, so that they can be photographed, can be complex and may depend, for example, on the type of surfaces on which they have been left. It is generally necessary to use a ‘developer’, usually a powder or chemical reagent, to produce a high degree of visual contrast between the ridge patterns and the surface on which a fingerprint has been deposited.