博文
美科学家用CT扫描300多万年前人类祖先化石
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http://www.sciencenet.cn/htmlnews/2009/2/216014.html
美国得克萨斯大学奥斯汀分校的科研小组与埃塞俄比亚有关方面日前合作，用CT扫描了300多万年前的人类祖先化石“露西”。科学家认为，这次扫描研究有助于找到人类祖先如何从树上下来开始直立行走的答案。
据当地媒体报道，科学家于1974年在埃塞俄比亚发现一具迄今保存最好的成年雌性南方古猿的骨架化石，并将该化石命名为“露西”。研究人员认为，这只古猿生活在距今大约320万年前，是迄今已知的最古老的原始人之一。
负责整个扫描工作的人类学家约翰·卡佩尔曼介绍说，他们对“露西”的所有80块骨骼化石都进行了扫描，“扫描使我们看到了‘露西’的内部结构”。
卡佩尔曼说，这次扫描工作能提供更多信息，帮助研究人员了解南方古猿的骨骼如何形成，以及这类物种是否既能行走，又能爬树。他还希望“露西”的CT扫描研究能为了解人类祖先的生活方式提供更多科研线索。
物理学家组织网相关报道（英文）http://www.physorg.com/news153146616.html
美国得克萨斯大学奥斯汀分校网站相关报道（英文）http://www.utexas.edu/news/2009/02/06/lucy_fossil/
Lucy, a 3.2-million-year-old specimen of Australopithecus afarensis, was recently studied in the High-resolution X-ray CT Facility at The University of Texas at Austin. She is the feature attraction in the exhibit, “Lucy's Legacy: The Hidden Treasures of Ethiopia,” on display at the Pacific Science Center in Seattle, Wa. Over 35,000 individual CT slices were collected during the scanning project. Image courtesy of the Houston Museum of Natural Science.
Photo: Frank White for Houston Museum of Natural Science
Scanning team (“Lucy the fossil 2008 team with IDs.jpg”)
Members of the scanning team included (from left) Ron Harvey, conservator, Lincolnville, Maine; Alemu Admassu, curator, National Museum, Addis Ababa, Ethiopia; John Kappelman, UT Austin; and Richard Ketcham, UT Austin. The team used the ultra high-resolution Xradia MicroXCT scanner (background), for some of the scans.
Photo: Marsha Miller/The University of Texas at Austin
Image of Lucy element in scanner (“Lucy the fossil 2008 - 3.18 million years old, scanned i jk rotate crop (1).jpg”)
Several of Lucy’s skeletal elements, including the right distal radius (arm bone) were scanned with an ultra high-resolution Xradia MicroXCT scanner in the High-resolution X-ray CT Facility at the University of Texas at Austin. Custom-built foam mounts were constructed to safely hold the specimens in the scanner. Each of the 80 pieces was carefully examined before and after scanning to ensure that no damage occurred during the project.
Photo: Marsha Miller/The University of Texas at Austin
Visit www.eLucy.org, an educational website for people of all ages to learn about Lucy and its place in the history of human evolution. Users can access an interactive viewer to compare images of Lucy’s bones with those of a human and chimpanzee. The website has a variety of puzzles, word searches, and flashcards along with life-sized printouts of Lucy and skeletons of adult and juvenile humans. Teachers can download lesson plans for use in the classroom.
Splash screen of HRXCT website (“HRXCT_splash a.jpg”)
Examples of a wide range of specimens scanned at UT’s High-Resolution X-ray Computed Tomography Facility, as well as information about high-resolution CT scanning, can be found at www.ctlab.geo.utexas.edu
j
几张漂漂的图片，贴不上，遗憾
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美国得克萨斯大学奥斯汀分校的科研小组与埃塞俄比亚有关方面日前合作，用CT扫描了300多万年前的人类祖先化石“露西”。科学家认为，这次扫描研究有助于找到人类祖先如何从树上下来开始直立行走的答案。
据当地媒体报道，科学家于1974年在埃塞俄比亚发现一具迄今保存最好的成年雌性南方古猿的骨架化石，并将该化石命名为“露西”。研究人员认为，这只古猿生活在距今大约320万年前，是迄今已知的最古老的原始人之一。
负责整个扫描工作的人类学家约翰·卡佩尔曼介绍说，他们对“露西”的所有80块骨骼化石都进行了扫描，“扫描使我们看到了‘露西’的内部结构”。
卡佩尔曼说，这次扫描工作能提供更多信息，帮助研究人员了解南方古猿的骨骼如何形成，以及这类物种是否既能行走，又能爬树。他还希望“露西”的CT扫描研究能为了解人类祖先的生活方式提供更多科研线索。
物理学家组织网相关报道（英文）http://www.physorg.com/news153146616.html
美国得克萨斯大学奥斯汀分校网站相关报道（英文）http://www.utexas.edu/news/2009/02/06/lucy_fossil/
Lucy, a 3.2-million-year-old specimen of Australopithecus afarensis, was recently studied in the High-resolution X-ray CT Facility at The University of Texas at Austin. She is the feature attraction in the exhibit, “Lucy's Legacy: The Hidden Treasures of Ethiopia,” on display at the Pacific Science Center in Seattle, Wa. Over 35,000 individual CT slices were collected during the scanning project. Image courtesy of the Houston Museum of Natural Science.
Photo: Frank White for Houston Museum of Natural Science
Scanning team (“Lucy the fossil 2008 team with IDs.jpg”)
Members of the scanning team included (from left) Ron Harvey, conservator, Lincolnville, Maine; Alemu Admassu, curator, National Museum, Addis Ababa, Ethiopia; John Kappelman, UT Austin; and Richard Ketcham, UT Austin. The team used the ultra high-resolution Xradia MicroXCT scanner (background), for some of the scans.
Photo: Marsha Miller/The University of Texas at Austin
Image of Lucy element in scanner (“Lucy the fossil 2008 - 3.18 million years old, scanned i jk rotate crop (1).jpg”)
Several of Lucy’s skeletal elements, including the right distal radius (arm bone) were scanned with an ultra high-resolution Xradia MicroXCT scanner in the High-resolution X-ray CT Facility at the University of Texas at Austin. Custom-built foam mounts were constructed to safely hold the specimens in the scanner. Each of the 80 pieces was carefully examined before and after scanning to ensure that no damage occurred during the project.
Photo: Marsha Miller/The University of Texas at Austin
Visit www.eLucy.org, an educational website for people of all ages to learn about Lucy and its place in the history of human evolution. Users can access an interactive viewer to compare images of Lucy’s bones with those of a human and chimpanzee. The website has a variety of puzzles, word searches, and flashcards along with life-sized printouts of Lucy and skeletons of adult and juvenile humans. Teachers can download lesson plans for use in the classroom.
Splash screen of HRXCT website (“HRXCT_splash a.jpg”)
Examples of a wide range of specimens scanned at UT’s High-Resolution X-ray Computed Tomography Facility, as well as information about high-resolution CT scanning, can be found at www.ctlab.geo.utexas.edu
j
几张漂漂的图片，贴不上，遗憾
https://wap.sciencenet.cn/blog-2189-213665.html
上一篇：骨折是如何发生的和为什么发生
下一篇：省钱又有效的半个性化足矫形器
