Porous cordierite ceramics were prepared from a mixture of coal fly ash and basic magnesium carbonate at 1100-1350℃. Porosity, flexural strength and thermal ex
The synthesis of racemic cedarmycin B,an antibiotic from Streptomyces sp.TP-A0456 was achieved firstly from γ-butyrolactone.The key step was a Barbier-type add
AIM: To examine if dietary and socio-economic factors contribute to Helicobacter pylori (H pylori) re-infection.METHODS: The population of patients consisted of