Goldman-Hodgkin-Katz equation in dart lang.

ghk_calculator.dart

import 'dart:math' as math;

// Temperatures should be in Kelvin
// pK, pNa, and pCl refer to the permeability. (e.g. If the channels for Na are closed, Na permeability is 0 (zero))
// Everything In or Out is in mM
// Membrane potential (voltage) is returned as mV

double ghkCalculator(double temperature,
                     double pK, double pNa, double pCl,
                     double kIn, double kOut,
                     double naIn, double naOut,
                     double clIn, double clOut) {
  const double universalGasConstant = 8.314;
  const double faradayConstant = 96485.0;
  
  double voltage;
  
  voltage = ((universalGasConstant * temperature) / faradayConstant) * math.log(((pK*kOut) + (pNa*naOut) + (pCl*clIn)) / ((pK*kIn) + (pNa*naIn) + (pCl*clOut)));
  
  return voltage / 1e-3;
}