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A |     ANN ARBOR, Mich. -- Greg Schneider scans rows upon rows of liquid-filled glass jars containing coiled snake specimens, just a portion of the University of Michigan Museum of Zoology's reptile and amphibian collection believed to be the largest held by any research institution in the U.S. thanks to a recent donation. The museum this fall acquired tens of thousands of reptile and amphibian specimens from Oregon State University, many of which are snakes. The development places the university in a unique position, according to Schneider, the research museum collections manager for the museum's division of reptiles and amphibians.“I’m fairly confident we’ll have the largest snake collection in the world,” he said. The extensive new additions also will allow scientists to conduct new snake and amphibian research, perhaps looking at trait evolution in mothers and their offspring. Numerous studies have been conducted in recent years about declining amphibian and reptile populations, Schneider said, noting they “are very good biological indicators of the health of the environment and ecosystems,” especially the amphibians.“Amphibians, unlike people, breathe at least partly through their skin, which is constantly exposed to everything in their environment,” he said, adding that “the worldwide occurrences of amphibian declines and deformities could be an early warning that some of our ecosystems, even seemingly pristine ones, are seriously out of balance.”Boxes containing water snakes, garter snakes, woodland salamanders, dusky salamanders and other species arrived last month. They were euthanized and ultimately placed in a solution that is 75% ethanol. The donations represent the lifetime work of two retired Oregon State professors, Lynne Houck and Stevan Arnold, who received a doctorate from Michigan in 1972.Schneider has yet to complete the painstaking process of cataloging the new material, but estimates it contains around 30,000 snakes. He said that would give Michigan a total of between 65,000 to 70,000 of the slithering vertebrates, surpassing collections at the Smithsonian in Washington, the American Museum of Natural History in New York and the University of Kansas. Some of the specimens housed at the museum prior to the Oregon State donation predate the Civil War.The "largest snake collection" title would be nice, but Schneider said the true promise of a big collection is new research opportunities. “The more stuff you have and the more associated materials that you have, the more things you can do,” Schneider said.The newly acquired Oregon State collection also includes about 30,000 associated frozen tissue samples. Along with advances in molecular genetics and more sophisticated DNA analyses, the samples will allow research that could result in a better understanding of inheritance, evolutionary relationships and “has huge applications in medicine,” said Hernán López-Fernández, an associate professor in Michigan's Department of Ecology and Evolutionary Biology.A number of the newly acquired jars contain both snakes and litters of their newborns, which Michigan professor Dan Rabosky said “is very, very rare for museum collections and is incredibly powerful for research, because it lets researchers ask questions about genetics that would otherwise not be possible.” Despite the daunting task of organizing the new collection, Schneider said he and his colleagues have noticed renewed excitement in team members who staff the university’s 153,375-square-foot (14,249-square-meter) Research Museums Center, where the specimens are housed.“Since these specimens arrived, people are very, very, very enthusiastic and supportive,” Schneider said. “And excited about the kinds of research that are going to be done with these collections.”。    7月20日，国力电子（688103.SH）发布投资者关系活动记录表。其中提到，大功率磁控管是MPCVD设备的核心器件，为设备提供稳定大功率微波能量。应用场景覆盖人造钻石、功率器件散热、第四代半导体、光学声学等高端精密场景。公司是国内少数可稳定量产大功率MPCVD设备磁控管的企业，致力于打破海外产品长期垄断格局，持续推进MPCVD设备核心器件的国产化替代。业务推进稳步有序，已实现小规模批量供货，客户端深度绑定头部MPCVD设备厂商。         另外表示，新能源板块是公司营收基本盘，整体业务推进节奏稳定。高压直流接触器交付稳定、客户粘性较强；新一代多合一模块化高压控制盒、轻量化配电装置等高端集成产品已实现批量供货，目前已构建完善的国内外优质客户体系，覆盖国内主流整车、电控及电池头部企业，同时落地海外高端车企供应链；风光储领域已成功进入阳光电源（300274.SZ）、特变电工（600089.SH）等行业龙头供应链，市场口碑与行业认可度持续提升。整体来看，新能源行业扩容趋势明确，公司产品迭代与市场拓展节奏匹配行业需求，具备持续迭代的业绩成长潜力。

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