Total tau in cerebrospinal fluid differentiates Alzheimer's disease from vascular dementia.

Background: Tau protein is a microtubule-associated protein located in neuronal axons, which has been used in various configurations as a diagnostic marker of degenerative changes in the CNS. The aim of our study was to evaluate the use of CSF/ total tau in patients with Alzheimer-type dementia (AD) and vascular dementia (VD) compared to controls, in order to investigate.

Material/methods: A total of 102 persons were included in the study: 58 AD patients, 24 VD patients, and 20 non-demented controls.

[Presence of nitrates and nitrites in raw milk as subject to the system of milk purchasing].

The content of nitrates and nitrites was determined in raw milk supplied to dairy works in the purchasing system: producer--milk collecting basin--dairy. In all, 480 milk samples were analysed. Most samples contained nitrates in amounts not exceeding 2 mg of NO3-/kg, while nitrites were present in trace amounts or were not detected at all.