EARLIER investigations have shown that cattle which exhibit a marked degree of natural resistance to infection with Haemonchus spp. also develop higher complement-fixation titres than susceptible ...

One of the newest and most hopeful weapons in the fight against polio is a blood fraction called gamma globulin. Doctors have known for several years that it is a rich storehouse of disease-fighting ...

THE antihaemophilic globulin (AHG), in electric fields migrating in the β 2-fraction, and being precipitated from blood plasma by alcohol in fraction I (ref. 1) is generally considered to be a protein ...