Unified treatment of mean-field dynamo and angular-momentum transport in magnetorotational instability-driven turbulence.

Magnetorotational instability-driven (MRI-driven) turbulence and dynamo phenomena are analyzed using direct statistical simulations. Our approach begins by developing a unified mean-field model that combines the traditionally decoupled problems of the large-scale dynamo and angular momentum transport in accretion disks. The model consists of a hierarchical set of equations, capturing up to the second-order correlators, while a statistical closure approximation is employed to model the three-point correlators.

Determination of Manganese in Serum Using GFAAS: Serum Reference Values for Manganese in the Adolescent Girls of the DERVAN Cohort.

Current proposed method allows for the determination of manganese in serum sample using aqueous standard calibration technique on Graphite Furnace atomic absorption spectrophotometer (GFAAS) using deuterium background correction. This method involves determination of manganese from digested serum samples without the use of matrix modifier. Pyrolysis and atomization temperatures are 1200 °C and 2200 °C respectively.