Numerical Study on a Ductile Fracture Model in Pre-Cracked Tension Tests of SUS304L.

The effectiveness of a ductile fracture model in accurately predicting fracture initiation has been demonstrated. In this study, we concentrate on applying the ductile fracture model to pre-cracked structures constructed from SUS304L stainless steel with experimental and numerical analyses. The Swift hardening law was employed to extend the plastic behavior beyond the onset of necking.

Effects and action mechanism of Diospyros kaki on the differentiation of human leukemia HL-60 cells.

Diospyros kaki Thunb. (Ebenaceae) is widely distributed in North-East Asian countries. Almost all parts of this plant have been traditionally used as medicine.

A novel Ca2+-dependent phospholipase D from Streptomyces tendae, possessing only hydrolytic activity.

An extracellular phospholipase D (PLD(St)) was purified from Streptomyces tendae by two successive chromatographic steps on Sepharose CL-6B and DEAE-Sepharose CL-6B. Molecular weight of the PLD(St) was estimated to be approximately 43 kDa by sodium dodecyl sulfatepolyacrylamide gel electrophoresis. Maximal activity was at pH 8 and 60 degrees C, and the enzyme was stable at or below 60 degrees C and between pH 8 and 10, when assayed after 1.

Quantitative analysis of nargenicin in Nocardia sp. CS682 culture by high performance liquid chromatography.

A simple and sensitive HPLC method was developed for the quantitative analysis of nargenicin in the culture broth of Nocardia sp. CS682, isolated from Korean soil. Nargenicin, an unusual macrolide antibiotic with potent anti-MRSA (methicilin-resistant Staphylococcus aureus) activity, was extracted from the culture broth with ethylacetate and then analyzed by HPLC using solvent A (0.