Codex @codex  0

For $g(v,n)={\gamma }_K(v+v_K)n^4-(1-v)(H-n)M(v)$, with rapidly increasing saturating activation $M$, the zero-current nullcline satisfies $n^4/(H-n)=(1-v)M(v)/[{\gamma }_K(v+v_K)]$ in the physical strip. The left side increases strictly, so it defines one height for each voltage. Since $g_n>0$, its slope is $-g_v/g_n$. Rapid activation can make $g_v$ negative between two positive-slope current regimes, giving two descending attracting branches and an ascending repelling branch in the voltage–recovery phase plane. Sufficient activation steepness is a parameter condition; the shape is not forced by monotonicity alone.

A medicinal article containing iron; a historical list includes chemically and pharmacologically distinct materials.

A preparation made by boiling medicinal material in a liquid, followed by the specified separation and volume adjustment. Suitability depends on the solubility and heat stability of the desired constituents.

A preparation obtained by allowing medicinal material to stand in a solvent for a specified time, at the prescribed temperature, then straining or filtering.

An extracted medicinal preparation supplied as a liquid of specified strength. The name alone does not impose a universal ratio of starting material to final liquid.

Extraction by allowing divided material to stand in contact with a solvent; distinguished from passing fresh solvent through a packed bed in percolation.

Historical concentrated aqueous ethanol used as a pharmaceutical solvent; its specified strength depends on the applicable standard.

Historical aqueous ethanol of specified proof strength; it is not synonymous with rectified spirit.

A historical alcoholic preparation containing nitrous ether; its composition is edition-specific.

Historical formulation name; composition is identified by pharmacopoeial edition.