Results 31 to 40 of about 7,866 (160)
On the Damage Tolerance of Diffusion Bonded Titanium–Aluminum Phase Biomimetic Composites
Rare Metals, EarlyView.ABSTRACT The biomimetic design principles of natural structures involve the strategic integration of stiff and compliant phases to synergistically enhance strength and toughness. Its evolutionary refined natural armor, characterized by a specialized microarchitecture, enables superior damage tolerance.
Shuai Tong +10 more
wiley +1 more source
Effect and mechanism of autophagy in corneal epithelial air-exposed injury [PDF]
, 2016 目的探讨自噬在角膜上皮细胞空气暴露损伤中的作用及内在机制。 方法以人角膜上皮细胞系和C57BL/6小鼠建立角膜空气暴露损伤模型。透射电子显微镜检测损伤过程中细胞结构的变化；免疫荧光染色、免疫印迹和实时荧光定量PCR等方法检测损伤过程中自噬相关基因以及炎症相关因子的表达变化；TUNEL染色检测细胞凋亡的发生。 结果透射电子显微镜观察到空气暴露培养的HCE细胞中自噬泡的存在。进一步通过免疫荧光染色和免疫印迹等检测方法证实随着空气暴露培养时间的延长，细胞中LC3（LC3Ⅱ）表达显著增强 ...
王国良
core
Methods in Ecology and Evolution, EarlyView.Abstract DNA barcode‐based species identification has become pivotal in biodiversity research. Current barcoding‐based deep learning methods have advantages in species identification but exhibit significant limitations. By using COI barcoding alone, previous studies were unable to fully capture species identification features. Prior methods showed that
Bin Ye +4 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 1997 摘 要 将钛涂层317L 接骨板植入电子线照射的犬右下颌骨体部, 用透射电镜(TEM)观察相邻骨膜超微 结构变化, 结果显示, 钛涂层317L 接骨板组相邻骨膜超微结构损伤比未喷涂钛层的317L 接骨板对照组轻微。 可能与未喷涂钛层的317L 接骨板所释放出来的毒性较大的C r 、Ni 离子对组织细胞的再损伤有关, 而钛涂层 317 L 接骨板表面呈纯钛相, 不会造成组织细胞超微结构明显损伤。
李少萍 朱明仁 姚小武 殷学民 任材年
doaj
Journal of Sociolinguistics, EarlyView.ABSTRACT This study adopts a transnational raciolinguistic perspective to examine how Chinese international students (CISs) navigate language, race, and identity across borders and contexts. Based on semistructured interviews with 14 CISs, the study highlights that pre‐migration socialization in China influences how CISs perceive and interpret their ...
Gengqi Xiao, Hailing Wang, Jing Yu
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2006 目的观察白芍总苷对急性心肌梗死犬微量元素及心肌超微结构的影响。方法取杂种犬30只,随机分为5组（每组6只）,分别为模型对照组、阳性对照药物（复方丹参注射液）组,白芍总苷2.0、4.0、8.0mg·kg-1剂量组;采用结扎麻醉开胸犬左冠状动脉前降支（LAD）产生急性心肌缺血模型,观察白芍总苷对微量元素及心肌超微结构的影响。结果与模型对照组比较,白芍总苷组微量元素铜（Cu）含量显著减少 ...
孙明莉 +5 more
doaj
Non‐Members in a Tight Spot: How Norway Navigated Autonomy in EU Pandemic Management
Review of Policy Research, EarlyView.ABSTRACT This study offers new insights into how closely integrated non‐member states navigate tensions between autonomy and dependence when urgent policy responses are required within complex supranational frameworks. It does so by exploring how these non‐members exercise their “wriggle room”—a tailored sub‐category of the broader concept of autonomy ...
Sjoerd Alexander de Winter
wiley +1 more source
Guangtongxin yanjiu, 2016 提出了一种基于双微环引起范诺共振效应实现超窄带滤波的微环谐振滤波器,通过泵浦波导和微加热装置使其同时具备有源和可调谐性能。通过耦合模理论,推导了该结构的透射率及超窄带带宽公式,并利用MATALAB软件模拟了在滤波器结构中注入增益对超窄带带宽和滤波器的透过率的影响,以及微环波导的热光效应对滤波器谐振波长的影响。仿真结果表明,在滤波器中注入增益能增大透过率,压缩滤波器的超窄带带宽,且微环波导的热光效应可使谐振波长发生红移或蓝移。
郑加金 +3 more
doaj
Microstructure and ultrastructure of antennary gland of Penaeus monodon(斑节对虾触角腺的显微和超微结构)
Zhejiang Daxue xuebao. Lixue ban, 2007 对斑节对虾触角腺的显微及超微形态结构进行了研究.其触角腺由体腔囊、迷路和原肾管3部分组成.体腔囊足细胞小，足突起短而细，胞质内小泡和颗粒不多；迷路细胞微绒毛短少而不整齐，含有大量小泡，基底及两侧质膜内陷较深，但基底部线粒体数量很少；原肾管细胞微绒毛较短少而杂乱，胞质内小泡和颗粒含量较少，基底及两侧质膜内陷很深.上述结果显示，斑节对虾触角腺各组成成分中，与其排泄和渗透压调节功能相关的结构较为发达.因此，该虾是甲壳动物中调节能力较强的“渗透压调节者”.
ZHOUShuang-lin(周双林) +1 more
doaj +1 more source
Effects of germanium toxicity on the morphology and ultrastructure of four species of microalgae. [PDF]
, 1998 将钝顶螺旋藻（Ｓｐｉｒｕｌｉｎａｐｌａｔｅｎｓｉｓ）、盐生杜氏藻（Ｄｕｎａｌｉｅｌａｓａｌｉｎａ）、湛江叉鞭金藻（Ｄｉｃｒａｔｅｒｉａｚｈａｎｊｉａｎｇｅｎｓｉｓ）、微绿藻（Ｎａｎｎｏｃｈｌｏｒｏｐｓｉｓ．ｓｐ）４种微藻培养在含１０ｍｇ／ｄｍ３锗的溶液中，研究了锗毒性对藻类细胞形态和超微结构的影响。结果表明，经锗处理的微藻细胞多变形且易破裂，胞壁和原生质体结合疏松，一些细胞的鞭毛变得细长弯曲或缺失。细胞超微结构中叶绿体（类囊体）、线粒体受锗毒性的影响最大，其它一些结构如细胞核、脂含物 ...
李少菁 +4 more
core +1 more source