threshold limit value (tlv) means under the condition of a specified concentration, it is not harmful to human beings to keep handling the product for 8 hours a day or 48 hours a week.
objective: to investigate the acute and accumlative toxicities of hydroquinone in mice and rats and to provide the information for establishing the threshold limit value of hydroquinone.
目的:研究氢醌对小鼠和大鼠的急性毒性和蓄积毒性,为建立卫生标準提供资料。
cognition function of brain was simulated by artificial nerve network by changing threshold limit value of linking point.