At the Annular Core Research Reactor (ACRR) facility, Sandia researchers can subject various test objects to a mixed photon and neutron irradiation environment featuring either a very rapid pulse rate or a long-term, steady-state rate.

Annular Core Research Reactor (ACRR) ACRR is used to test objects in a mixed photon and neutron irradiation environment. Researchers conduct a wide variety of experiments in nearly every branch of nuclear science.

2011年10月31日 · With a dry, 9-inch diameter cavity in the core’s center, and a 20-inch diameter external cavity, the ACRR subjects electronics to high-intensity neutron irradiation and conducts reactor safety research. The ACRR also has done testing for semiconductor manufacturers, NASA, the Large Hadron Collider in Switzerland and dozens of other users.

2019年3月1日 · The ACRR was specifically designed to meet the irradiation testing needs of the U.S. nuclear weapons program. The ACRR has four major attributes that make it unique: 1) a large dry central cavity; 2) an epithermal neutron flux; 3) a large pulsing capability; and 4) a fueled-ring external cavity with a larger dry cavity.

2011年11月28日 · At peak power in its steady state mode, the ACRR produces up to four megawatts of power. But during a maximum pulse, it generates a whopping 35,000 megawatts of power for seven milliseconds. Nuclear engineer and former University of New Mexico professor Ron Knief compares its power output to that of the Palo Verde Nuclear Generating Station ...

rr值：主要用于前瞻性队列研究，通过设计随访调查试验，来研究控制因素对于事件结果发生情况的影响程度。 以最常见的“吸烟—肺癌”试验为例，找一群吸烟的人和不吸烟的人，随访若干年，观察吸烟和不吸烟的人群中分别有多少人患肺癌：

危险因素的meta分析，由于研究类型和分析方法的差异，对应的文献会使用OR (Odd ratio)、RR (Risk ratio)、 HR (Hazard ratio)中的一个报道暴露因素与研究结局的关联。如何对三者进行合并？

2013年4月23日 · TetR / AcrR家族的成员是两个域蛋白，包括N端HTH DNA结合基序和C端配体识别域。 C末端配体识别结构域可以识别与其转运的目标转运蛋白完全相同的化合物。

2017年11月3日 · AcrR为负调因子 ，N端有DNA结合位点，C端有底物结合位点。 菌体内没有药物存在时，AcrR与 acrAB 基因结合，抑制AcrAB蛋白表达。 当药物进入菌体后，AcrR与药物结合引发构象改变，N端与DNA链分离，解除了 acrAB 基因的抑制作用，从而激活外排蛋白的表达( 图 …

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