It is our purpose in this communication to give the results of some work upon complement fixation in syphilitic and other sera, using specific antigens prepared from pure cultures of Spirochceta pallida, Spirochceta pertenuis, and Spirochceta microdentia. The results are compared with those obtained with the same sera and a stock antigen used in our routine Wassermann tests, this antigen consis...

Potato clones from five different breeding populations were evaluated for their relative resistance and susceptibility to Pratylenchus penetrans. Resistance and susceptibility were distinguished by an index of susceptibility (SI) calculated from the numbers of P. penetrans (including eggs) per g of root of individual clones in relation to that of a susceptible control at 30 or 70 days after ino...

Sea anemones of the genus Aiptasia Gosse, 1858 are conspicuous members of shallow-water environments worldwide and serve as a model system for studies of cnidarian-dinoflagellate symbiosis. However, to date there have been no comprehensive analyses investigating the systematics of the group. In addition, previously published phylogenetic studies of sea anemones have shown that the genus is not ...

Habitat management is a conservation biological control technique which helps to reduce the use of inputs in olive orchards and also improve sustainability. Recent studies have pointed out that vegetation cover, provides food resources, as well reproduction refuge sites, increases Chrysopidae populations diversity. However, little known about effect woody semi-natural habitats (SNHs) orchards. ...

Anatomical alterations in leaves and DNA damage in cells caused by the accumulation of atmospheric pollutants can be measured by epidermal leaf analyses and Tradescantia micronuclei assay with early pollen tetrad cells. The present study examined the feasibility of using somatic and germ cells of Tradescantia pallida for biomonitoring purposes in the city of Dourados, state of Mato Grosso do Su...