Harvest Rate Model. In a perfusion-based process, harvest of cell culture fluid begins significantly before cell density or titer has reached a steady state. After inoculation of the bioreactor, cells grow in batch mode until a specific cell density is achieved, at which point perfusion is initiated at a low HR.
Borax (sodium tetraborate hexahydrate or sodium borate) is a naturally-occurring mineral composed of sodium, boron, oxygen and water. It has been used as a remedy for over 4000 years. Most commercially-produced borax is mined from deposits produced by the repeated evaporation of seasonal lakes. It is found in large quantities in the Western United States, in Mediterranean countries, Kazakhstan, and the Tibet region of China. Turkey is one of the largest commercial producers of borates.
Shares & Saves. Save. septic image by Trevor Allen from Fotolia.com. Borax is a natural-forming, non-biodegradable cleaning alternative to the toxic, chemical-laced household cleaning products and substances often flushed into or poured down the drain of septic systems.Other People Are Reading.onsiderations. While nontoxic to people, borax is only less harmful to a septic system's biological treatment of waste than the chemicals found in everyday cleaning products. Large amounts of borax filtered into the environment through a septic system's drain field could injure trees and other plant life.