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Shanghai, China

Luo X.-Y.,East China University of Science and Technology | Ye F.,B and W Tek Opto Electronics Shanghai Co. | Wu L.-M.,Shanghai Museum | Yuan S.-W.,East China University of Science and Technology | And 2 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2010

Identification and characterization of materials used in cultural heritage and conservation can provide important information for dating, authentication and deteriorating situation in general. How to extract useful information from these materials in-situ is one of the main concerns. Application of mobile Raman spectroscopy for this purpose has great attentions for scientists and conservators. The present paper aims to investigate the mobile Raman spectroscopy in studying the effect of UV light on the deterioration of silk, seal ink and Chinese traditional colorants such as kermes, vermillion and zhubiao, which is commonly appeared on painted works of art, and the silk sample is also often used as an consolidant for repairing destroyed textile objects. Spectra were recorded from predefined regions on the samples before and after ultraviolet radiation with 360 nm wavelength and 0.68 W · m-2 intensity. The result revealed obvious effects of ultraviolet radiation on the materials simulated in this research. The original kind of seal ink has been clearly identified. The changes in spectra of all samples with and without UV radiation were further distinguished and studied. The result will assist for scientists and conservators to determine the safe treatments and suitable environmental condition for storage, display and transport. The result will also help for studying mechanism of deterioration of museum objects influenced by environmental factors. The mobile Raman spectroscopy showed a suitable and convenient means for in-situ non-destructive detection and study of deterioration in practical conditions. Source

Wang Z.,East China Normal University | Zhuang C.,East China Normal University | Saito Y.,Geological Survey of Japan | Chen J.,Shanghai Museum | And 2 more authors.
Quaternary Science Reviews | Year: 2012

We used a series of Holocene sediment cores with AMS 14C dated basal saltmarsh peat and supratidal sediment to reconstruct early mid-Holocene sea-level change on the southern Yangtze delta plain. We also synthesized results for ca 150 late Quaternary cores, as well as archeological data to reveal the unique interplay between coastal evolution and Neolithic cultural response. Relative sea level was ca -16.5 to -14.5 m from 8600 to 8500 cal BP and ca -6 to -4 m from 7400 to 7200 cal BP, reflecting the rate of eustatic sea-level rise but being ca 10 m higher possibly because of the effect of hydro-istostasy. Three late Pleistocene interfluve terraces, T3 to T1, were revealed at burial depths of <5 m, 5-15 m, and 20-30 m, respectively, lying between the paleo-incised mega-valleys of the Yangtze River in the north and the Qiantang River in the south, during the last glacial maximum. During the early mid-Holocene, the combined effect of rapid sea-level rise and the huge sediment accommodation space of the mouths of the two mega-rivers resulted in widespread inundation by brackish water and the shoreline retreated onto the highest terrace (T3). Although seaward migration of the Yangtze delta probably began at ca 7300 cal BP, saltmarsh and tidal flats dominated on the southern Yangtze delta plain until ca 6500 to 6000 cal BP when sea level became relatively stable and the shoreline prograded rapidly from T3 to the seaward boundary of T2. The concurrent formation of the freshwater-dominated Taihu Plain allowed Neolithic settlement and development of agriculture. © 2012 Elsevier Ltd. Source

Derui T.,Chinese Society of Traditional Crafts | Haiping L.,Shanghai Museum
China Foundry | Year: 2011

In the course of Chinese civilization, which lasted more than 5,000 years, casting production has made a huge contribution. In this paper, some representative metal castings were presented. According to their forming techniques, they can be grouped into stone mould casting, clay mould casting, ablation casting, lost wax casting, stack casting, permanent mould casting, sand casting, etc. According to their materials, they can be categorized into tin bronze, bimetallic bronze, malleable cast iron, ductile cast iron, brass, cupronickel alloy (Packtong), etc. According to their surface decorative techniques they can be devided into gem inlay, gilding, gold and silver inlay, copper inlay, engraved decoration, surface tin-enrichment, mother-of-pearl inlay, burnished works with gold or silver inlay, surface coloring and cloisonné enamel, etc. Source

Zhong Y.,Sun Yat Sen University | Qiu Z.,Sun Yat Sen University | Li L.,Sun Yat Sen University | Gu X.,Shanghai Museum | And 3 more authors.
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | Year: 2013

Nephrite genesis and its origin identification is an important branch in the research of petromineralogy and archaeology of ancient jade. Among the numerous studies conducted by predecessors, REE (rare earth element) was taken as a significant tool analyzing mineral genesis and geochemical conditions, and thought to be valuable in further research. This paper used measuring methods as LA-ICP-MS to analyze REE compositions of Hetian-Xinjiang, Liyang-Jiangsu, Luodian-Guizhou, and etc. Combined with data reported by predecessors, and applying statistical methods as variance analysis, the paper conducted a relative systematic analysis and comparison of REE contents, patterns and related parameters of nephrites from the above origins. The results showed that, due to the diversity in ore-forming fluids and geochemical settings, certain differences of REE contents and patterns among various origins existed: nephrites from Hetian-Xinjiang presented a strong negative anomaly of Eu; nephrites from Xiuyan-Liaoning displayed an obvious fractionation between LREE and HREE; nephrites from Ge'ermu-Qinghai had a relative low REE contents; nephrites from Liyang-Jiangsu, Luodian-Guizhou and Wenchuan-Sichuan had a common feature of negative Ce anomaly; and the above characteristics could be regarded as diagnostic features. Combined with REE differences among nephrites of different origins and their major elements as well other trace elements feature, the paper explored nephrite origin identification within China. Source

Tan D.-R.,Shanghai Museum | Lian H.-P.,Shanghai Museum
Zhuzao/Foundry | Year: 2010

In the course of Chinese civilization, which lasts more than 5000 years, casting production has made a huge contribution. In this paper, the main representative metal castings were presented. Some castings show the different traditional casting techniques including the stone-mold casting, the clay-mold casting, the metal-mold casting, the stack-casting, the ablation casting, the lost-wax process and the sand-mold casting. Some castings show different alloy technologies including tin bronze, composite metal, malleable cast iron, ductile cast iron, brass and cupronickel. Some castings show surface decorative techniques including gem inlay, gilding, gold and silver inlay, copper inlay, carved decoration, surface tin-enrichment, mother-of-pearl inlay, burnished works with gold or silver inlay, surface coloring and cloisonné enamel, etc. Source

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