Spherical colloids with cationic and anionic surfactants Cylindrical DNA with cationic surfactant and micelle formation Cylindrical DNA with cationic and anionic surfactants and micelle formation Cylindrical DNA with cationic, anionic and neutral surfactants Flexible polyelectrolytes with cationic, anionic and neutral surfactants Adsorption isotherms for mioglobin and hemoglobin Debye-Huckel interaction or Yukawa in different geometries London-van-der-Waals interaction in different geometries