Welding welding was invented in 1893, and around that time another process, oxyfuel welding, became well established. Acetylene was discovered in 1836 by Edmund Davy, but its use was not practical in welding until about 1900, when a suitable torch was developed. At first, oxyfuel welding was one of the more popular welding methods due to its portability and relatively low cost. As the 20th century progressed, however, it fell out of favor for industrial applications. It was largely replaced with arc welding, as advances in metal coverings (known as flux) were made. Flux covering the electrode primarily shields the base
Mujibur Rahman (scientist) Transfusion Society in Bangladesh and acted as its president. Rahman wrote six books. He published research articles that include discovering blood grouping antisera and enzymes Bromelain from Bangladeshi pineapples for detection of irregular antibodies from fruits to detect A1 red cells. Rahman discovered one of the rarest blood groups, the Bombay blood type, in the world from two Bangladeshi families. Mujibur Rahman (scientist) Mujibur Rahman (d. 29 June 2015) was a Bangladeshi medical scientist. He established the first blood transfusion center at the Institute of Post Graduate Medicine and Research (now Bangabandhu Sheikh Mujib Medical University). He was awarded Ekushey