According to the USAID and JICA websites and various other sources, Japan is currently Bangladesh's largest bilateral donor.
japan
Cesideo Galli is the largest donor to Bowdoin college giving more than 16 million to the college...
In 2004 France was the third-largest donor country in absolute terms. It was the fifth-largest donor considering the percentage of GDP (after Denmark, Norway, Sweden, Netherlands) and ahead of the United Kingdom, Germany and Japan. (source OECD, official development assistance 2004)
The United States.
According to the CIA World Fact Book the United States of America has been the world's largest food donor since the mid twentieth century.
The largest, single individual donor in the history of the Ole Miss athletics department was $3.7 million dollars. Ironically, the donor remains anonymous. The donation helped Ole Miss to raise over $15 in donations for their 2012 fundraising campaign.
Singapore
The largest overall is the United States at ~23 billion dollars/ year. The largest by percent of national income is Sweden at ~1.12%/ year. *Both of the statics are about governmental donations not about private donations.
O negative is the universal donor because when O+ve blood group is transfused to -ve blood group recipient, antibodies are produced which causes hemolysis of Rh +ve labelled blood cells. When O-ve blood is transfused to Rh +ve recipient, no antibodies are produced as donor blood has no Rh factor present on blood cells, so no transfusion reaction occurs. Thus, O -ve is universal donor.
O negative blood group is universal donor, it is bcz it haz no agglutinogen (antigens which r specific proteins on the surface of RBCs), so when transfused there will be no agglutinogen in it to react with agglutinins(defencive prteins /antibodies) present in the recipients blood. O (oh) is actually zero that indicates that no antigens are present on RBC surface.
Brain death must be present before organ transplantation can happen. The donor is kept on the ventilator while consent is obtained from next of kin, and also while the testing is completed on the donor for compatibility with the recipients.