Difference of Bioseparation from Chemical Separation very low concentrations , bioseparation has to be very selective in nature. . Injectable therapeutic products should be free from endotoxins and pyrogens . susceptible to denaturation thermolabile sub-ambient temperatures. ulti-technique separation. • Biological products are separated based on the factors of: Size: e.g. filtration, membrane separation, centrifugation Density: e.g. centrifugation, sedimentation, floatation Diffusivity: e.g. membrane separation Shape: e.g. ce...
Comparison of conventional and modern techniques • In conventional techniques, isolation and manipulation of DNA or RNA is not applied. • Experiments are set based on phenotypic characters and the results are expressed based on observations or quantitative measurements. • The basic materials of modern biotechnology are nucleic acids (NA) and proteins (P). • NA and P are isolated from tissue, purified and subjected to certain processes. • NAs are amplified in bacteria or by polymerase chain reaction (PCR), cut with restriction enzymes and hybridized with a different NA, If necessary, or run on an Agarose Gel Electrophoresis, stained and visualized. • Likewise, proteins are purified, run on an SDS-PAGE gel, stained/immunoblotted and visualized. Proof of transforming factor In vivo Experiment • In 1928, Frederick Griffith described a transforming principle that transmitted the ability of bacteria to cause pneumonia in mice. “tra...