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1.
采用光学显微观察、激光拉曼、紫外-可见吸收光谱以及高效液相色谱对河北隆化鸽子洞蓝棉袄蓝色、浅蓝色纤维以及百衲枕顶蓝色纤维进行分析研究.通过多种分析手段相互佐证表明,该组样品采用蓝草中的靛蓝染色,色素成分有靛蓝素和靛玉红.各样品中色素成分比例均不相同,推测至少在元代,人类已经能够有意识地调整制靛工艺,染出自己需要的色光.同时靛蓝染料耐光性耐热性差,对酸、碱和氧化均敏感,耐盐性及耐细菌性较弱.在以靛蓝染色的织物清洗中,要选择性地使用洗涤剂,进行点滴试验后才可使用,同时在存放过程中要做到避光、避免高温.  相似文献   
2.
海峡文化圈是历史上汉族文化南下开发东南地区的过程中,与当地闽越文化相结合,应对海峡地区特定的自然地理条件的挑战而逐步形成的一个区域文化单元。它具有多维的空间内涵和突出的文化特征;在引进和创新科技、促合经济文化互动和整合区域内部文化差异方面,表现出很强的活力。在当代社会历史条件下重构海峡文化圈,有着深刻的历史必然性。  相似文献   
3.
无酸纸的发展及其在文物保护中的应用   总被引:1,自引:0,他引:1  
无酸纸是很重要的一种馆藏文物保护载体.本文对无酸纸的发展现状及在文物保护中的应用进行了总结.同时指出,根据我国文物保护的需要,研制文物保护专用无酸纸并建立相关的评价标准是无酸纸的发展趋势.  相似文献   
4.
This research was carried out to investigate the seismic performance of RC beam-column joints under acid rain circle via comparison of energy dissipation behavior and failure mechanism of joints with different corrosion levels and axial compression ratio. At the initial corrosion level, the strength, ductility, and energy consumption of RC beam-column joints improved slightly; at a later stage, the bearing and deformation capacity decreased as the corrosion rate of steel rebars increased. The test shows that with the increasing of the axial compression ratio, the initial stiffness and ultimate bearing capacity of the joints will increasing if the corrosion levels are the same, but the ductility of that will decrease.  相似文献   
5.
以山西永济蒲津渡铁器群现场保护过程中因温湿度变化、有害气体的侵蚀、酸雨、凝露等因素所引起的铁器析盐及铁在不同环境中的氧化还原反应现象为实例,进一步分析铁器的大气腐蚀现象。  相似文献   
6.
Analytic ethics in the central period – extending from the beginning of the twentieth century to post-World War II linguistic analysis – is too often construed by historians and philosophers alike in monolithic terms as the emotivism of A. J. Ayer. In contrast, we argue that a multiplicity of ethical doctrines were developed by analytic philosophers at this time of which Ayer's emotivism was just one. Moreover, we maintain that this multiplicity of ethical doctrines was itself the result of a multiplicity of conceptions of analysis and that connecting these two sets of beliefs makes for the best understanding of analytic ethics.  相似文献   
7.
By drawing, among others, on the ideas of the Bakhtin Circle and Judith Butler, this paper explores spatial struggles over the right to free speech at Hyde Park, London, 1861–1962. From the 1860s to the early 20th century, the state gradually constructed a “monologic” discourse about an ideal-typical “indecent” speaker who would “trespass” on Hyde Park through their “excitable speech” against a legally sanctioned right to give a “public address” in the park. This discourse gave the state some room to evict those it claimed to be transgressing “public address”. However, different “heteroglossic coalitions” of regulars ensured that Hyde Park remained not only a “political assembly” to discuss political issues, but also a “social assembly” to exercise free speech on a range of social topics. Indeed, by the 1950s, these coalitions used a nearby road scheme to successfully argue it was the state that was potentially trespassing, or “encroaching”, on free speech at Hyde Park.  相似文献   
8.
Diagenetic alteration may limit the potential use of the biogenic composition of fossil bone as a reliable source of information for dietary, environmental and climatic reconstructions. One of the key parameters used to determine the state of preservation of fossil remains is their crystallinity. This can be evaluated by means of infrared spectroscopy, measuring the “splitting factor” (IRSF). However, the crystallinity may fail to describe the extent of chemical and mineralogical changes occurring during fossilization, and cannot be used alone as a reliable indicator of biogenic signal preservation.  相似文献   
9.
In his De tragoediae constitutione (1611) Heinsius rearranged the text of Aristotle's Poetics, and built on it a new general theory of drama, literature and speech. The new system was designed to render Christian exemplars and Christian theories of internalisation, pedagogy and motivation impossible to maintain, and thereby sidestep one of the most divisive issues in the intellectual debates of the Reformation. Irenicist secularisation is a major cause of Heinsius's impact on German, English and French literary theory.  相似文献   
10.
晚清时期香港与北方环渤海地区的贸易关系   总被引:1,自引:0,他引:1  
晚清时期香港与北方环渤海地区的贸易关系密切,东北地区通过牛庄口岸,山东及朝鲜通过烟台口岸,直隶及广大北方腹地通过天津口岸与香港展开了繁密的贸易往来.不同地区的洋货进口结构略有不同,而土货出口结构则差别较大,反映出区域经济发展的差异.对外贸易的发展刺激了腹地外向型经济的兴起.  相似文献   
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