Semantics is the study of meaning. Meaning itself is a broad area of study. It can refer to lexical meaning or structural meaning (the meaning related to the structure of sentence). I will try to give the example of structural meaning. A sentence consists of pragmatic information and semantic information.
PCR stands for Polymerase Chain Reaction, a method for amplifying DNA in vitro. Where, in cloning DNA into a plasmid, the DNA is amplified by the bacterial cell when it replicates the plasmid, PCR amplifies DNA in a test-tube. Cycling temperatures: Of the three temperatures used in a cycle of PCR, the denaturing and extension temperatures remain unchanged for the most part, since most DNA is denatured at 94-95 degrees C, and the temperature optimum for the Taq DNA polymerase lies between 72 and 74 degrees C.
What is RCR? RCR stands for Responsible Conduct of Research. The responsible and ethical conduct of research is critical for excellence, as well as maintaining the public trust in research, both for individual students, professors, and staff and for Cornell as an institution. Education in RCR is essential in the preparation of future researchers and scholars.