Characterization of Cyclodepsipeptides from the Mycelium of Isariajaponica from Vietnam.

A new cyclodepsipeptide, isarin (1), was isolated from the insect pathogenic fungus Isaria japonica Yasuda, together with one known compound, beauveriolide 1 (2). The structure of this new compound was characterized using a combination of spectroscopic and spectrometric analyses.

Distribution of silica-exposed workers by province and industry in Vietnam.

To determine the number and distribution of exposures among workers exposed to silica dust in Vietnam, a cross-sectional study was conducted of the provincial Preventive Medicine Centers (PMCs) of 61 provinces, and data were collected from medical centers (MCs) of the Ministries of Construction, Industry, and Transportation. The PMC survey identified 112,956 exposed workers in 31 provinces. Ministry data identified 240,744 exposed workers. Quang Ninh province, with 50,000-70,000, had the highest concentration. These estimates provide a range of 40,000-350,000 exposed workers, supporting the development of a validated registry of silica-exposed workers, essential to the development of a program for silicosis prevention in Vietnam.