Rev. F. T. Havergal, D. D.

Quinacrine Rev&d

Quinacrine (Atebrine, mepacrine) is an a&dine derivate described in 1932 by Schulemann for the treatment of malaria (Samuelsson and Goldyne, 1978). It was discovered in an intensive research programme on synthetic antimalarials carried out in the third decade of this century in the German laboratories of I.G. Farbenindustrie. The programme covered the preparation and trial of over 12 000 compou...

Paratactic Semantics (d R a F T !)

Ba s ed on D i f f e ren t Opera t ion Sys tems

locators (EFLs) based on different operation systems Root ZX and Propex II. Ten healthy adult patients needing premolar extractions due to orthodontic reasons participated in the study, providing a sample of 17 noncarious, non-restored, vital teeth (n= 24 canals). After coronal access preparation and cervical preflaring and prior to tooth extraction, the root canal length was measured alternati...

Comment on Phys . Rev . D 60 084017 “ Classical self - force ” by F . Rohrlich Stephen Parrott 2575

F. Rohrlich has recently published two papers, including the paper under review, advocating a particular delay-differential equation as an approximate equation of motion for classical charged particles, which he characterizes as providing a “fully acceptable classical electrodynamics”. This Comment notes some mathematical and physical problems with this equation. It points out that most of the ...

Comment on Phys. Rev. D 60 084017 " Classical Self-force " by F. Rohrlich

F. Rohrlich has recently published two papers, including the paper under review, advocating a particular delay-differential equation as an approximate equation of motion for classical charged particles, which he characterizes as providing a “fully acceptable classical electrodynamics”. This Comment notes some mathematical and physical problems with this equation. It points out that most of the ...