[Spectrum analysis and measurment research on visual density of the national standard densitometer].

Visual density is an important index for the estimation of photographic film and visual photo. The development of biomedical image and macromolecule image needs high measurement uncertainty of visual density in spectrum characteristic. The ISO standard of visual density measurement conditions was modified in 2001.

[Relationship between clinical features and prognosis of highly pathogenic avian influenza A/H5N1 infection in humans in mainland China].

Objective: To investigate the relationship between clinical features of patients with A/H5N1 infection and their prognosis in mainland China.

Methods: This study included 28 human cases with A/H5N1 infection in mainland China from October 2005 to May 2008. Data were collected and reviewed from hospital medical records and publishied papers.