Abstract. The authors used carbon fiber as the substitute of a part of tin and all of lead in the tin bronzematrix, and studied the tribological properties of short carbon fiber-reinforced Cu–4 wt.%Sn–6 wt.%Zn composites. The effects of the fiber volume fraction, the load and sliding speed of the wear test were investigated. The composition of the matrix and the different fiber coating …
BACKGROUND: Probiotics are widely used in the food industry and medicine fields in China, but few studies have been conducted to evaluate the actual microbial amounts and species in probiotic products, which may conflict with the labels and mislead consumers to choose inappropriate foods or medicines. RESULTS: Twenty commercial dairy products and eight commercial ‘healthcare’ samples were …