P-series: A new fuel recently added to the definition of ‘alternative fuel’. It consists of certain blends of MTHF (Methyl tetrahydrofuran), ethanol and hydrocarbons (pentane plus). Related posts: Personnel Management Operative Functions Administrative Role of PM Competency HR Management Role Change Personnel Policies Personnel Procedures Appealed Policies Implied Policies Specific Policies Personnel records Research Pure research Personnel research Attitude or Opinion Survey Turnover Secondary research Applied research Personnel audit Read more articles Previous PostPrimary filter or Surface filter Next PostPush rod