World Blood Donor Day 1868. World Blood Donor Day celebration brings a precious opportunity to all donors for celebrating it on national and global level as well as to commemorate the birthday anniversary of the Karl Landsteiner (a great scientist who won the Nobel Prize for his great discovery of the ABO blood group system). The theme for Blood Donation Day in 2018 is 'Be there for someone else. Give blood. Share life' The theme for Blood Donation Day in 2017 focus on blood donation in emergency situations. The first response when an emergency happens is "What Can You Do?" and the answer is
Nobel Prize controversies article describing the subatomic particle meson pi (pion). Lattes was solely responsible for the improvement of the nuclear emulsion used by Powell (by asking Kodak Co. to add more boron to it—and in 1947, he made with them his great experimental discovery). This result was explained by the Nobel Committee policy (ended in 1960) to award the prize to the research group head only. Lattes calculated the pion's mass and, with USA physicist Eugene Gardner, demonstrated the existence of this particle after atomic collisions in a synchrotron. Gardner was denied a prize because he died soon thereafter. The 1938 prize