In 1970, the number of HMOs declined to fewer than 40. Paul M. Ellwood, Jr., often called the father of the HMO, began having discussions with what is today the U.S. Department of Health and Human Services that led to the enactment of the Health Maintenance Organization Act of 1973.
How is Nutrient Broth (microbiology) abbreviated? NB stands for Nutrient Broth (microbiology). NB is defined as Nutrient Broth (microbiology) very rarely.
The Study of Microbiology - Definition Microbiology is defined simply as the study of microorganisms, with micro meaning small, and biology, referring to the study of living things. The microorganisms studied vary widely and the field of microbiology is broken down into many subfields of study.