Although the structure of thiamin (vitamin B,) has been known for over 40 years (Williams, 1936; Grewe, 1936) and its chemical synthesis accomplished soon thereafter (Williams & Cline, 1936; Andersag & Westphal, 1937; Todd & Bergel, 1937), the biosynthetic pathway to thiamin (3) has still not been elucidated completely. It is well established that the pyrimidine (1) and thiazole (2) moieties ar...

Andrew Francis Dixon studied human anatomy and egg [2] cells at the turn of the twentieth century in Ireland and Great Britain. Dixon studied the sensory and motor nervous system of the face, the cancellous bone tissue of the femur, supernumerary kidneys, and the urogenital system. In 1927 Dixon described a mature human ovarian follicle. This follicle, Dixon noted, contained an immature human e...

Türing’s argument that there can be no machine computing the diagonal on the enumeration of the computable sequences is not a demonstration. As well known, Türing historical article of 1936 is the result of a special endeavor focused around the factuality of a general process for algorithmic computation. As resultant formal model his famous abstract computing machine, soon called Türing machine...

The United States remains far behind most other affluent countries in terms of life expectancy. One of the possible causes of this life expectancy gap is the widespread availability of firearms and the resulting high number of U.S. firearm fatalities: 10,801 homicides in 2000. The European Union experienced 1,260 homicides, Japan only 22. Using multiple decrement techniques, I show that firearm...

Ostrich is co-published by NISC (Pty) Ltd and Taylor & Francis Northern Mozambique has a series of isolated montane inselbergs whose avifauna has only fully come to light in the last two decades, owing in part to the civil war which made the area largely inaccessible from the 1970s until the early 1990s. These inselbergs are especially significant because, first, they contribute to a biogeograp...