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class="pcb"> <div class="t_fsz"> <table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_1202303"> <strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"> “过去约200年来，利用传统方法，凭化石推敲恐龙外观，并非百分百准确，因为牠们被保存下来的通常只有骨骼。近年已使用紫外线进行化石分析，但仍然有改进空间。”香港大学地球科学系助理教授（研究）文嘉棋带领的古生物团队，将传统考古学与科技结合，经三年多时间研究，检视了200多个近鸟龙化石，从中挑选出9至12个标本进行新式<a href="http://laser.oecr.com" target="_blank" class="relatedlink">激光</a>扫描，利用激光诱导荧光技术，成功重塑首个带羽毛的近鸟类恐龙的身体轮廓，包括四肢及尾巴。</font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"><br /> </font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"> 有助研究鸟类起源</font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"><br /> </font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"> 激光诱导荧光技术是近年一种崭新技术，先利用高强度激光，令在骨头周围、肉眼看不到的软组织“在黑暗中发出荧光”。这技术由文嘉棋的合作伙伴Foundation for Scientific Advancement的Tom Kaye研发，先在黑房中以紫色激光扫描化石，激光会“刺激”一些保留在岩石基质的皮肤原子，令它们<a href="http://light.oecr.com" target="_blank" class="relatedlink">发光</a>，从中获得更多微细数据，以揭示恐龙真正的外形。文嘉棋补充，使用前会先调低激光强度，避免损害化石。</font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"><br /> </font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"> 研究团队利用这项新技术，深入观察近鸟龙化石的翅膀软组织，发现其翅膀形状和现代鸟类在各方面都很相似，又保留一些原始特徵，例如羽毛是较平均地分布，而不是一行行地排列。文嘉棋表示，这些新发现，为重新建构恐龙如何尝试飞行，以至最后达至有飞行能力，提供了重要线索，同时有助研究鸟类起源。这项具突破性的研究结果，于英国伦敦时间2月28日于<a href="http://theory.oecr.com" target="_blank" class="relatedlink">学术</a>期刊《自然通讯》（Nature Communications）发表。</font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"><br /> </font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"> 到各地扫描特殊标本</font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"><br /> </font></font></font></strong><strong><font face="Microsoft YaHei, 微软雅黑, SimHe, 黑体"><font size="3"><font color="#333333"> 研究样本来自山东，文嘉棋指该地的自然博物馆是世界一流，他在其研究文章指出：“过去二十多年来，我们一直对中国东北部那些奇异的带羽毛恐龙感到惊嘆。然而，我们从来没有想过软组织会这样广范地被保存下来。”他说，继今次利用新技术对近鸟龙的发现，研究团队已因应各方邀请安排到世界各地扫描特殊的标本。他于今个月亦会再度前往山东，考察带羽毛类恐龙化石。</font></font></font></strong><br /> </td></tr></table> <div class="ptg mbm mtn"> <a title="香港大学" href="misc.php?mod=tag&id=6901" target="_blank">香港大学</a>, <a title="激光" href="misc.php?mod=tag&id=78" target="_blank">激光</a></div> </div> <div id="comment_1202303" class="cm"> </div> <div id="post_rate_div_1202303"></div> </div> </div> </td></tr> <tr><td class="plc plm"> <div id="p_btn" class="mtw mbm hm cl"> <a href="http://club.oecr.com/home.php?mod=spacecp&ac=favorite&type=thread&id=304434&formhash=5952e71b" 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