Dielectric and specific heat relaxations in vapor deposited glycerol.

Recently [S. Capponi, S. Napolitano, and M.

Transformation of quiescent adult oligodendrocyte precursor cells into malignant glioma through a multistep reactivation process.

How malignant gliomas arise in a mature brain remains a mystery, hindering the development of preventive and therapeutic interventions. We previously showed that oligodendrocyte precursor cells (OPCs) can be transformed into glioma when mutations are introduced perinatally. However, adult OPCs rarely proliferate compared with their perinatal counterparts.

Identification of Bordetella pertussis infection by shared-primer PCR.

A shared-primer PCR method for the detection of infection was developed by using primers derived from DNA sequences upstream of the structural genes for the porin proteins of Bordetella pertussis and Bordetella parapertussis. This method resulted in a 159-bp PCR product specific for B. pertussis and a 121-bp DNA fragment specific for B.

Prolonged survival of Bordetella pertussis in a simple buffer after nasopharyngeal secretion aspiration.

A simple method for recovery of Bordetella pertussis is described using phosphate-buffered saline containing a casein hydrolysate for transporting secretions collected by nasopharyngeal aspirate. Bordetella pertussis was reisolated from 92% of clinical specimens held at 4 degrees C for 1 week and from all specimens held at -20 degrees C. This method will facilitate the centralization of laboratory facilities for the diagnosis of pertussis.