Azotobacter vinelandii is a model free-living diazotroph, which converts atmospheric nitrogen into ammonia in the presence of atmospheric oxygen. During the last decades, extensive work has been carried out to study the genetic and metabolic properties of free living nitrogen fixing bacteria. However, there is still little information regarding biomass production of these types of microorganisms for fertilizer applications. The present work aims to develop an optimum medium for cell mass production of A. vinelandii.

Moringa peregrina belongs to the Moringaceae family and is native to the western part of Saudi Arabia and the eastern part of Egypt, from where it has been transferred to tropical and subtropical countries. The Moringa trees are highly appreciated for their nutritional and medicinal properties. In the past two decades, research has focused on investigating different parts of Moringa as a source for anticancer preparations. However, M.

Human gastrointestinal microbiota (HGIM) incorporate a large number of microbes from different species. Anaerobic bacteria are the dominant organisms in this microbial consortium and play a crucial role in human health. In addition to

The great demand for animal feed additives is directly proportional to the increased world human population. Such increase in demand has inspired scientists to look for alternatives to traditional feed additives in order to cope with the increased requirements in animal feeds which ultimately enter the human food chain. Antibiotics have been used traditionally as animal feed additives for their various beneficial effects.