Conversion of the Museum of Vertebrate Zoology Genetic Resources Collection from Ultra-cold to Liquid Nitrogen Storage

MVZ遗传资源收集目前保存在电动超冷冷冻机中，但在本项目中将过渡到液氮冷冻机。液氮冷冻机在几个方面优于超低温冷冻机，包括(1)不依赖电力来维持温度（如果附近海沃德断层发生地震后出现长期停电，这是一个关键的保障措施），(2)样品保持在-150摄氏度（消除了在-80摄氏度的超低温下持续存在的组织降解）。整个收集（包括约100,000个纸巾瓶）也将被盘点和条形码。遗传资源收藏是世界上最大的组织收藏之一，地理覆盖全球。它是全世界从事脊椎动物物种遗传研究的研究人员的资源，包括代表灭绝物种的样本，以及因人为栖息地改变和传染病而灭绝的种群。这个项目将大大减少伯克利校园的能源使用和碳足迹。加州大学伯克利分校可持续发展办公室、校园气候行动伙伴关系（Cal CAP）和战略能源计划将把它作为一个范例，展示如何在不影响学术研究的情况下进行谨慎的能源排放管理。

The MVZ Genetic Resources Collection currently is maintained in electrically powered ultra-cold freezers, but will be transitioned in this project to liquid nitrogen freezers. Liquid nitrogen freezers are superior to ultra-cold freezers in several respects, including (1) lack of dependence on electricity to maintain temperature (a critical safeguard should there be an extended loss of electricity following an earthquake on the nearby Hayward Fault), and (2) samples are maintained at -150 degrees C (eliminating tissue degradation that persists at -80 C ultra-cold temperatures). The entire collection (encompassing ~100,000 tissue vials) also will be inventoried and bar-coded.The genetic resources collection is among the largest tissue collections in the world, with worldwide geographical coverage. It is a resource for researchers throughout the world who undertake genetic studies of vertebrate species, and includes samples representing extinct species, as well as populations extirpated by anthropogenic habitat modification and infectious disease. This project will substantially reduce the energy usage and carbon footprint of the Berkeley campus. The UC Berkeley Office of Sustainability, the Campus Climate Action Partnership (Cal CAP), and the Strategic Energy Plan will showcase it as an example of how careful management of energy emissions can be undertaken without compromising academic research.