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Although a bay-region dihydrodiolepoxide metabolite has been considered as a principal ultimate electrophilic and carcinogenic form of 7,12-dimethylbenz[a]anthracene (DMBA), other reactive metabolites might also play a role in the activation of this hydrocarbon in vivo. Earlier studies suggested the
The polysaccharide APS-2a was isolated from Angelica sinensis (Oliv.) Diels through water extraction, deprotein, ethanol precipitation and DEAE-sephades A-25 column chromatography respectively,and was further purified by Sephacryl S-400 and Sephadex G-100 column chromatography. The phenol-sulfuric
The well-defined (1 leads to 3)-beta-D-glucan with (DPn) 540, produced by cultivation of Alcaligenes faecalis var. Myxogenes (IFO 13140), a mutant of a soil bacterium, had marked inhibitory activity against the s.c.-implanted Sarcoma 180 at 5 to 50 mg/kg for 10 days. It also exhibited very high
The Unified Theory of PAH Carcinogenicity accommodates the activities of methylated and non-methylated polycyclic aromatic hydrocarbons (PAHs) and states that substitution of methyl groups on meso-methyl substituted PAHs with hydroxy, acetoxy, chloride, bromide or sulfuric acid ester groups imparts
As a bone mineral component, hydroxyapatite (HA) has been an attractive bioceramic for the reconstruction of hard tissues. However, its poor mechanical properties, including low fracture toughness and tensile strength, have been a substantial challenge to the application of HA for the replacement of