[The role of sentinel lymph node biopsy in oral cavity cancer].

Objectives: This study aims to evaluate the role of sentinel lymph node (SLN) biopsy in patients who had clinically N0 oral cavity cancer in the neck assessment.

Patients And Methods: Between May 2006 and May 2008, nine patients with clinically N0 oral cavity cancer (6 females, 3 males; mean age 57±24.7 years; range 31 to 71 years) who underwent surgical treatment were enrolled in this study.

Research note: modeling of the water quality of Büyüksu Stream, Bolu, Turkey.

The QUAL2E model was applied to the Büyüksu Stream, Bolu, Turkey, to predict the effect of conventional and industrial pollutant sources on stream quality. The model parameters were conditioned using data from eight sampling stations on a 24-km stretch of the stream during a steady-state period between May 2003 and June 2004. The higher biochemical oxygen demand (> 50 mg/L) and lower dissolved oxygen concentrations measured (< 4.