The first recorded spelling of the family name is possibly that of Adam Medecalf. This was dated 1301, in the Subsidy Rolls of Yorkshire, during the reign of King Edward 1st, 1272 - 1307. Surnames became necessary when governments introduced personal taxation.In England this was known as Poll Tax.t is chiefly recorded in the county of Yorkshire, and there have been claims that it represents the very first hereditary surname. This is arguable, but there is no doubt that it was one of the very first.
As for tooth decay, conventional dentistry says that sugar alcohols do not promote it and the United States Food and Drug Administration (FDA) agrees. In fact, you will see claims - sanctioned by the FDA - that one sugar alcohol in particular, xylitol, PROTECTS teeth from cavities. Even though this is odd that on one hand, dentists say sugar causes tooth decay, but then on the other hand they claim that sugar alcohols can protect against tooth decay.
a) 70% ethanol has been found to be most effective in killing microbes. Higher or lower concentrations are not so effective in killing microbes. b) if you use 90% or absolute ethanol, it will evaporate fast and may not be much effective. 70% percent of alcohol is ideal to a stronger solution. Pure alcohol coagulates protein in contact. Suppose the pure alcohol is poured over a single celled organism. The alcohol will go through the cell wall of the organism in all direction, coagulating the protein just inside the cell wall. The ring of the coagulated protein would then stop the alcohol from penetrating farther from the cell, and no more coagulation would take place.