NH3 sorption isotherms in ALPO-11 and its Si, Co, and Mn analogues

Article Abstract:

The ammonia sorption isotherms in ALPO-11 and its Si, Co and Mn analogues were examined up to 500 Torr in the temperature range 333-483 K. The NH3 sorption isotherms were found to be of a Langmuir type. Results also showed that the amount of irreversibly retained NH3 depends on the total amount sorbed and the intrinsic acidity associated with the zeolite framework. Moreover, the protons resulting from the substitution of Co2+ or Mn2+ in place of Al3+ were stronger than those resulting from the substitution of Si4+ in place of P5+.

Research, Manganese, Manganese (Metal), Absorption, Cobalt, Molecular sieves, Silicon, Atmospheric temperature, Ammonium compounds, Ammonium salts

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Interaction energies between tetrahydrobioprotein analogues and aromatic residues in tyrosine hydroxylase and phenylalanine hydroxylase

Article Abstract:

The interaction energies between tetrahydrobioprotein (BH4) analogues and aromatic residues in tyrosine hydroxylase and phenylalanine hydroxylase were examined. The results suggested that dispersion dominates these interactions and electrostatics is not enough to bind the BH4.

Protein research, Aromatic compounds, Chemical properties

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Transient electrokinetic transport in a finite length microchannel: currents, capacitance, and an electrical analogy

Article Abstract:

The transient electrokinetic conveyance of charge in a finite length cylindrical microchannel is studied. An electrical analogy based on the capacitance and current source is also developed for the microchannel.

Electric currents, Electric current, Capacitance, Cylinder (Mathematics), Cylinders (Geometry)

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