So how many stars are there in the Universe? It is easy to ask this question, but difficult for scientists to give a fair answer! Stars are not scattered randomly through space, they are gathered together into vast groups known as galaxies. The Sun belongs to a galaxy called the Milky Way.
Reverse osmosis. Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.
PERFORMANCE UNDER PRESSURE. Compared to other filtration technologies that rely on a screen or filter to remove particles, reverse osmosis (RO) and nanofiltration (NF) are pressure-driven separation processes that employs a semi-permeable membrane and the principles of cross-flow filtration.