Expanded uncertainty. quantity defining an interval about the result of a measurement that may be expected to encompass a large fraction of the distribution of values that could reasonably be attributed to the measurand.
Introduction. 'Phantosmia' is the medical term for an imaginary odour (phantom smell) . It is also known as an olfactory hallucination. The smell is unique to the person and is usually unpleasant, spoiling the taste of any food or drink consumed.It can be in one or both nostrils.ess commonly, the cause of phantosmia is either nerve cells sending abnormal smell signals to the brain, or a problem with the brain itself. This may be the result of: 1  a disease affecting the nervous system, such as epilepsy, Parkinsonâs disease or Alzheimerâs disease. 2  a stroke.
Costia. Costia is a ciliated protozoan that can kill great numbers of fish in a very short time just like Chilodonilla. It can be active in cold water down to 45 degrees Fahrenheit. Small numbers of Costia are not uncommon and appear not be detrimental to the fishâs health.In small numbers these parasites seem to live on cellular debris in a commensalistic relationship with their fish host. It becomes a serious threat when, for various reasons, the parasite becomes established in large numbers.mall numbers of Costia are not uncommon and appear not be detrimental to the fishâs health. In small numbers these parasites seem to live on cellular debris in a commensalistic relationship with their fish host. It becomes a serious threat when, for various reasons, the parasite becomes established in large numbers.