Zhu Xiwen said at a hearing held by the Congress on that day that the devices were shipped to Japan in 7.8 tons of equipment in the United States. In addition, the Department of Energy also provided Japan with a device to monitor nuclear radiation levels in the atmosphere. The US Department of Energy also provided Japan dispatched 39 experts to help Japan monitor and evaluate the situation of nuclear power plants that have leaked.
Zhu Xiwen said: “While reminding us of the nuclear radiation situation, we continue to provide assistance to Japan in every possible way.â€
According to Zhu Xiwen, the US Department of Energy contacted US experts in Japan almost every hour to obtain an update on the nuclear accident in Japan.
The EPA also said on the same day that it will deploy more radiation monitoring devices in the Western United States and overseas territories in the Pacific. People can check the monitoring data on the western coastal states, Hawaii, Guam, and American Samoa on their websites.
In the sea area of ​​northeastern Japan, an earthquake measuring 9 on the Richter scale occurred on the 11th and triggered a large-scale tsunami, causing heavy casualties. After the earthquake, many nuclear power stations in the affected areas in Japan were affected. Four reactor units in the Fukushima Daiichi nuclear power plant had chemical explosions and radioactive materials leaked out. This caused concern in various circles. Some countries suggested that the nationals postponed their visits to Japan. The organization evacuated on the day. The US Nuclear Regulatory Commission previously stated that the nuclear accident in the earthquake-stricken area in Japan will not cause harmful effects on the health of Americans.
At present, in the process of isolation and preparation of various stem cells from various tissue sources, Centrifuge Tubes with a volume of 15ml and 50ml are used.
It is one of the low-value consumables with high usage rate. It is generally installed on a dry foam rack with the package or in bulk. When used, it is taken out by the operator and placed on the plastic centrifuge tube rack in the ultra-clean workbench. The common centrifuge tube rack can only make the centrifuge tube stand upright. When transferring liquid or needing centrifugation, the operator should hold the centrifuge tube in the left and the night gun or aspirator in the right. If it is necessary to transfer a large amount of liquid reagents or perform gradient centrifugation operations, such as density gradient centrifugation to separate mononuclear cells, the operator needs to hold the centrifuge tube with the right hand for a long time and tilt the centrifuge tube, which often causes the operator's wrist joint pain. At the same time, it will also affect the liquid superposition effect, which will easily lead to the mixing of liquids of different densities, resulting in the failure of the experiment.
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