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Kevin Kit Parker is a lieutenant colonel in the United States Army Reserve [1] and the Tarr Family Professor of Bioengineering and Applied Physics at Harvard University. [2] His research includes cardiac cell biology and tissue engineering, traumatic brain injury , and biological applications of micro- and nanotechnologies.
Aspergillus fumigatus can survive on a variety of different nitrogen sources, and the assimilation of nitrogen is of clinical importance, as it has been shown to affect virulence. [ 25 ] [ 30 ] Proteins involved in nitrogen assimilation are transcriptionally regulated by the AfareA gene in A. fumigatus .
The ability of P II to sense important metabolites and integrate signals deriving from energy status (ATP and ADP ratio), carbon (2-oxogluratate) and nitrogen (glutamine and 2-oxoglutarate) levels were capitalized during evolution such that P II can act as a dissociable regulatory subunit of a range of transporters, transcriptional regulators ...
Phosphate conversion coating is a chemical treatment applied to steel parts that creates a thin adhering layer of iron, zinc, or manganese phosphates to improve corrosion resistance or lubrication or as a foundation for subsequent coatings or painting.
Nitrogen generators are used in hypoxic air fire prevention systems to produce air with a low oxygen content which will suppress a fire. To prevent corrosion, nitrogen generators are used in place of or in conjunction with a compressed air system to provide supervisory nitrogen gas in place of air for dry pipe and pre-action fire sprinkler systems.
Cutaway view of PORV. Like other pressure relief valves (PRV), pilot-operated relief valves (PORV) are used for emergency relief during overpressure events (e.g., a tank gets too hot and the expanding fluid increases the pressure to dangerous levels).