Range of action and genetic bacteriocin codification of Pseudomonas aeruginosa isolated from three different ecological niches.

Strains of Pseudomonas aeruginosa isolated from sediments in wells showed a greater bacteriocinogenic activity in those isolated from river and clinical specimens. More than half of all the strains examined had extrachromosomal DNA. Plasmid DNA was extracted from all the strains and in only 24/120, all from different origins, was the curing achieved; all these strains coded their bacteriocins in the chromosomal DNA.     

Morphology and cytology of Hordeum chilense X H. bulbosum hybrids

Summary An interspecific hybrid between Hordeum chilense and H. bulbosum was produced. The hybrid resembles the male parent, but some characters from H. chilense are also present. Transgressive inheritance for other characters has also been observed. Neither chromosome instability nor homoeologous pairing was found.     

An acid-cleavable linker stable at neutral pH that releases doxorubicin at lysosomal pH

A Kemp's triacid amide of doxorubicin (DOX), esterified at a second carboxyl, releases DOX at lysosomal pH at a reasonable rate but is extremely stable at neutral pH.     

Amino acid determination in some edible Mexican insects

Summary The amino acid contents of edible insects from different provinces of Mexico and reference proteins were analysed by reversed-phase high-performance liquid chromatography and ion exchange chromatography. The insect amino acid contents were higher than the adult requirements indicated by the WHO/FAO pattern.