rickets
A childhood bone disease that can usually be traced to a Vitamin D metabolic disorder.
R
radiometer
A radiometer serves to measure electromagnetic waves. These devices are generally based on photodiodes which convert the incoming radiation into a proportional electrical signal. Lux meters and photometers are typical radiometers.
radiation dose
Here: The dose in terms of exposure to UVC radiation.
radiometry
Radiometry is the science of radiation measurement, used in astronomy and physics, among others.
reflection (phys.)
Reflection refers to the (partial) return of electromagnetic waves at an interface. Reflection is the opposite of absorption. Since UVC rays have a different wavelength from light, they also behave differently at interfaces in terms of absorption and reflection. Light-reflecting surfaces are therefore not to be understood as synonymous with UVC-reflecting ones!
reoviruses
Reoviruses (sci. family Reoviridae) are unenveloped viruses with double-stranded RNA. The rotavirus (a diarrhoea pathogen), for example, belongs to this group.
replication
The propagation of genetic information (DNA).
resistance (bio.)
Resistance describes the ability of a microorganism to withstand measures taken to destroy it. The increasing resistance of pathogens to antibiotics is of growing concern in medicine.
resonance line
A resonance line is the measurable signal transmitted by excited atoms when transitioning from their excited state to their original state.
recipient
A person, organism or thing that receives something.
RNA
[Abbr. for ribonucleic acid] - DNA matrix generated by transcription.