anoxic

Normal Microbial Flora of the Oral Cavity

by

The oral cavity is one of a complex, heterogeneous microbial habitat. Saliva contains microbial nutrients, but it is not an especially good growth medium because the nutrients are present in low concentration. Also the saliva contains antimicrobial substances. Saliva contains an enzyme lysozyme that cleaves glycosidic linkages in peptidoglycan present in the bacterial cell wall, … Read more

Purple Phototrophic Bacteria

by

These bacteria carry out an-oxygenic photosynthesis. Thus, unlike the cyanobacteria oxygen is not released by these groups. These bacteria are a morphologically diverse group and their classification has been established along phylogenetic, morphological and physiological lines. Different genera fall within the Alpha-, Beta-, or Gammaproteobacteria. Bacteriochlorophylls and carotenoid pigments are present on them. Due to … Read more