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应力环境对大鼠股骨生长与重建和力学性能的影响 被引量:2
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作者 赵文志 刘迎曦 +4 位作者 张军 李守巨 李靖年 孙晓江 李宝文 《中国生物医学工程学报》 CAS CSCD 北大核心 2006年第1期79-82,87,共5页
通过创建一种新的动物模型,研究应力环境对生长期大鼠股骨生长与重建,以及对其力学性能的影响,并探讨其作用机理。切断6周大SD大鼠右后肢的坐骨神经,致使其右后肢残废,为废用组;左后肢过度负重,为过载组;正常大鼠为对照组。每天早午晚... 通过创建一种新的动物模型,研究应力环境对生长期大鼠股骨生长与重建,以及对其力学性能的影响,并探讨其作用机理。切断6周大SD大鼠右后肢的坐骨神经,致使其右后肢残废,为废用组;左后肢过度负重,为过载组;正常大鼠为对照组。每天早午晚鼓励动物运动半小时,4周后结束实验观测。测量股骨中段的宏观几何学参数、物理学参数和生物力学参数。实验发现:与对照组相比,实验组股骨的若干几何及物理参数发生了明显变化,表明应力环境可以改变活骨组织的成份和结构并逐渐改变其力学性能。实验结果表明,本研究提出的实验模型实用且可靠。 展开更多
关键词 应力环境 生长重建 组织计量学 生物力学性能
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新村湾泰来藻有性繁殖的初步研究 被引量:5
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作者 许战洲 黄良民 +2 位作者 黄小平 朱艾嘉 王汉奎 《热带海洋学报》 CAS CSCD 北大核心 2008年第2期60-63,共4页
在采用生长重建法(reconstruction methods)研究海南新村湾泰来藻Thalassia hemprichii的有性繁殖过程中,发现泰来藻花芽形成期和种子萌芽期分别在每年的秋季末(11月初)和次年春季初(2月底),比菲律宾泰来藻种群早约2个月,雌雄花比例为1... 在采用生长重建法(reconstruction methods)研究海南新村湾泰来藻Thalassia hemprichii的有性繁殖过程中,发现泰来藻花芽形成期和种子萌芽期分别在每年的秋季末(11月初)和次年春季初(2月底),比菲律宾泰来藻种群早约2个月,雌雄花比例为1∶4,单次开花率是0.95%。 展开更多
关键词 泰来藻Thalassia hemprichii 生长重建 有性繁殖
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The Avenue of Sphinxes: Restoration of a Legend
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作者 Adham Abulnour 《Journal of Civil Engineering and Architecture》 2014年第8期952-962,共11页
The redevelopment of historic cities is often challenged by intricate--and in many cases contradictory--missions. From one side, there is the urge to comprehensively preserve cultural resources. At the same time, oppo... The redevelopment of historic cities is often challenged by intricate--and in many cases contradictory--missions. From one side, there is the urge to comprehensively preserve cultural resources. At the same time, opportunities of economic growth should be made available and needs of contemporary living maintained and nourished. The main aim of this paper is to reconcile probable incompatibilities between such missions through promoting "sensitive" redevelopment approaches in historic cities. The paper focuses on the city of Luxor, Egypt with its immensely capturing yet quite undermined legend: the Avenue of Sphinxes. In Luxor, the injection of nonintrusive interventions presents itself as a highly potential candidate in protecting and enhancing the experience of the avenue while meeting contemporary needs of living. Adopting less sensitive development approaches can lead the quality of experiencing the whole city to be worsened for the increasing numbers of tourists and locals. 展开更多
关键词 Noninvasive interventions image of the city sense of place SELECTIVITY RESPONSIVENESS
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Restoration of Posidonia oceanica (L.) Delile Meadows: Is There An Effective Methodology?
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作者 Bedini Roberto Nannelli Annalisa Batistini Francesca 《Journal of Life Sciences》 2013年第7期722-726,共5页
Since 1947 (Addy) [1, 2], marine biologists have conducted experiments in order to re-establish meadows using various methods of transplant. A 27-month experiment of germinating and growing Posidonia oceanica (L.)... Since 1947 (Addy) [1, 2], marine biologists have conducted experiments in order to re-establish meadows using various methods of transplant. A 27-month experiment of germinating and growing Posidonia oceanica (L.) Delile seeds was carried out in two areas near Piombino in the Leghorn Province (Italy). Seeds in direct contact with the sea bottom were taken from other seaside areas. The leaf growth and the percentage of well-developed plants in the study areas were calculated. The results confirm that this method appears to be a good re-establishment technique despite the problems associated with finding a large number of seeds anywhere along Mediterranean coasts. 展开更多
关键词 RESTORATION Posidonia oceanica SEEDS growth.
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Band structure reconstruction across nematic order in high quality FeSe single crystal as revealed by optical spectroscopy study 被引量:2
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作者 Haipeng Wang Zirong Ye +1 位作者 Yan Zhang Nanlin Wang 《Science Bulletin》 SCIE EI CAS CSCD 2016年第14期1126-1131,共6页
We perform an in-plane optical spectroscopy measurement on high quality FeSe single crystals grown by a vapor transport technique. Below the structural transition at Ts - 90 K, the reflectivity spectrum clearly shows ... We perform an in-plane optical spectroscopy measurement on high quality FeSe single crystals grown by a vapor transport technique. Below the structural transition at Ts - 90 K, the reflectivity spectrum clearly shows a gradual suppression around 400 cm-1 and the conductivity spectrum shows a peak at higher frequency. The energy scale of this gap-like feature is comparable to the width of the band splitting observed by ARPES. The low-frequency conductivity consists of two Drude components and the overall plasma frequency is smaller than that of the FeAs based compounds, suggesting a lower cartier density or stronger correlation effect. The plasma frequency becomes even smaller below Ts which agrees with the very small Fermi energy estimated by other experiments. Similar to iron pnictides, a clear temperature-induced spectral weight transfer is observed for FeSe, being indicative of strong correlation effect. 展开更多
关键词 Iron-based superconductor OPTICALSPECTROSCOPY Nematic phase Band reconstruction
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