The lectotype (P00537796) is designated for the name Brachyscome neocaledonica Guill. (now accepted as Pytinicarpa (Guill.) G.L.Nesom), type species of genus G.L.Nesom (Asteraceae). This action proved necessary only syntypes that were cited by Guillaumin in protologue; also, no lectotypification was provided when Nesom erected Pytinicarpa. Some from gatherings protologue represent a related sar...

The potential antihypertensive activity of Brazilian plants was evaluated in vitro by its ability to inhibit the angiotensin-converting enzyme (ACE). Forty-four plants belonging to 30 families were investigated. Plants were selected based on their popular use as antihypertensive and/or diuretics. The following plants presented significant ACE inhibition rates: Calophyllum brasiliense, Combretum...

Bacillus subtilis contains three Fur homologs: Fur, PerR, and Zur. Despite significant sequence similarities, they respond to different stimuli and regulate different sets of genes. DNA target site comparisons indicate that all three paralogs recognize operators with a core 7-1-7 inverted repeat. The corresponding consensus sequences are identical at five or more of the seven defined positions....

Large numbers of bacteria coexist in the oral cavity. Streptococcus sanguinis, one of the major bacteria in dental plaque, produces hydrogen peroxide (H(2)O(2)), which interferes with the growth of other bacteria. Streptococcus mutans, a cariogenic bacterium, can coexist with S. sanguinis in dental plaque, but to do so, it needs a means of detoxifying the H(2)O(2) produced by S. sanguinis. In t...