May 30, 2016 news, Xi'an. According to the authority of the domestic sperm bank examination report, the normal adult male sperm passing rate of less than 30%. Northwest Women and Children's Hospital of human sperm bank in 2015 donor 1000, qualified only 100 people, but the fine with 1400 people. Experts say that sperm as a year, but sperm demand more and more.     Less than 30% of the pass rate behind, with the full liberalization of the second child policy, the domestic demand for sperm is increasing. How to effectively store the sperm sample is also a great test of the major domestic sperm bank! So that sperm forever "youth", -196 ℃ liquid nitrogen tank is also widely used in the major sperm banks!       Sperm forever "youth" of the secret     After collecting the semen, take a small amount to do a sample check, the rest of the added protection agent, Meiling biological medical liquid nitrogen tank (-196 ℃) frozen up. When needed, the sperm sample tubes are thawed in a 37 ° C water bath.   Liquid nitrogen tank temperature is -196 ℃, this time sperm metabolism at a minimum level, reduce metabolism can be long-term survival. In theory, these sperm samples can be stored in liquid nitrogen tank for several years, decades or even a hundred years. Foreign literature has reported that 30 years after the resurrection of sperm frozen can still produce healthy offspring.   Meiling liquid nitrogen tank use, not only in the life incubation period, more likely to be some people's life-saving straw.     In recent years, the promotion of umbilical cord blood stem cells increased, the stem cell treatment prospects, Cord blood stem cells are not only rich in content, and immune rejection is relatively mild, can treat leukemia, cancer and other 80 kinds of diseases, baby and family can , Is a very good stem cell source.     The same is the liquid nitrogen cans, cord blood in the umbilical cord blood bank as a "home" for the preservation of umbilical cord blood has an irreplaceable role.   January 27 is the opening day of autologous umbilical cord blood in Beijing, in Beijing cord blood bank of 1,500 square meters of liquid nitrogen library in neatly arranged with hundreds of the world's largest single storage silver liquid nitrogen cans, more than 200,000 baby's umbilical cord Blood was stored in these -196 ° C liquid nitrogen tanks. In order to ensure the safety of umbilical cord blood, the liquid nitrogen reservoir is equipped with 24-hour closed-circuit monitoring, infrared alarm, dual-circuit power supply and the liquid nitrogen level of 24 hours monitor.   Meiling Bio-medical liquid nitrogen tank and wireless intelligent monitoring system with the perfect, in the sperm, embryos and umbilical cord blood and other storage process, can effectively monitor the biological samples in the tank to protect biological samples of the safety and stability.