resin Any of several solid or semisolid inflammable substances, of natural or synthetic organic origin; usually translucent polymers
that do not conduct, that break like glass, and that are soluble in ether, alcohol, and essential oils but not in water. The
word is used generically to describe chromatographic media, particularly polymer beads.
resolution A measure of the distinguishability of individual elements (the component parts of a mixture, for example). In chromatography,
the quality of separation measured in terms of the purity of the resulting component fractions (higher resolution means greater
restriction enzyme A bacterial enzyme that cuts DNA molecules at discrete base-pair locations.
retentate The part of a mixture that is held back by a filter because of its size, shape, and/or charge.
retention time The period of time between initial application of an elution buffer and the exit from the column of a particular sample component.
Radioimmunoassay, a bio-analytical method that uses specific antibodies and radiolabeled detector molecules to quantitate a defined analyte
in mixtures. For safety considerations, many immunoassays are now performed using dyes or other markers in lieu of the radioactive
Ribonucleic acid, the nucleic acid based on ribose (a sugar) and the nucleotides G, A, U, and C. It translates the information encoded by DNA
into amino acid sequences the cell uses to make proteins. Similar to DNA but based on ribose, and with the base uracil (U)
in place of thymine (T). Various forms of RNA are found: mRNA (messenger RNA); tRNA (transfer RNA); and rRNA (ribosomal RNA).
Most RNA molecules are single-stranded, although they can form double-stranded units.
risk The combination of the probability of occurrence of harm and the severity of that harm [from ICH Q9; see also ISO/IEC Guide
risk acceptance The decision to accept risk [from ICH Q9; see also ISO Guide 73].
risk analysis The estimation of the risk associated with the identified hazards [from ICH Q9].
Staining makes it easier to see the details of these human skin cells (particularly the cell nuclei).
risk assessment A systematic process of organizing information to support a risk decision to be made within a risk management process.
It consists of the identification of hazards and the analysis and evaluation of risks associated with exposure to those hazards
[from ICH Q9].
risk communication The sharing of information about risk and risk management between the decision maker and other stakeholders [from ICH Q9].
risk control Actions implementing risk management decisions [from ICH Q9; see also ISO Guide 73].
risk evaluation The comparison of the estimated risk to given risk criteria using a quantitative or qualitative scale to determine the
significance of the risk [from ICH Q9].
risk Identification The systematic use of information to identify potential sources of harm (hazards) referring to the risk question or problem
description [from ICH Q9].
risk management The systematic application of quality management policies, procedures, and practices to the tasks of assessing, controlling,
communicating and reviewing risk [from ICH Q9].
risk reduction Actions taken to lessen the probability of occurrence of harm and the severity of that harm [from ICH Q9].
risk review Review or monitoring of output/results of the risk management process considering (if appropriate) new knowledge and experience
about the risk [from ICH Q9].
robust Strongly formed or constructed, sturdy; a product or process that doesn't break easily or remains stable and (for a process)
reproducible despite physical and chemical stress or varying conditions.