Since the discovery of Helicobacter pylori, the urease activity of this bacterial pathogen has been identified as the key factor in infection and acid acclimation in the human stomach. Ureolytic activity plays a key role in the pathogenesis of several bacteria, and urease has also been described as an emerging pathogenic factor during fungal infection. However, urease produced by the oral bacte...

Over a period of three years, microbial communities in acidified soil with high sulfur content were analyzed. In soil water extracts ureolytic, proteolytic, oxidoreductive, and lipolytic activity were detected. The presented results indicate that the enzymatic activity of soil microbial communities varied considerably over time. Isolated 26 (80%) bacterial strains belonged to genus Bacillus sp....

Abstract Purpose Stabilization of weak soil can be achieved through different methods, some which include jet column, cement stabilization and fly ash stabilization. Unfortunately, the use aforementioned methods improvement affects environment negatively thereby leading to environmental degradation. With aforesaid impediment in mind, need for devising becomes pertinent. Methods Bacillus sp . — ...

Cheatgrass invasion of Intermountain sagebrush steppe in the western United States poses increasing challenges to function and survival this native ecosystem. The invasive success persistence cheatgrass has been attributed soil total nitrogen, but mechanisms behind remain inconclusive. We hypothesized that microorganisms play a role nitrogen associated with invasion. collected samples from root...

Bio-cementation is a new sustainable approach that has gained popularity due to its low energy and carbon dioxide footprint compared with those of existing technologies for geotechnical geoenvironmental engineering applications. soil improvement technique involves binding the pore space particles calcium carbonate minerals by microbially induced precipitation (MICP) filling space. The purpose t...

Biomineralization is a known natural phenomenon associated with a wide range of bacterial species. Bacterial-induced calcium carbonate precipitation by marine isolates was investigated in this study. Three genera of ureolytic bacteria, Sporosarcina sp., Bacillus sp. and Brevundimonas sp. were observed to precipitate calcium carbonate minerals. Of these species, Sporosarcina sp. dominated the cu...