Characterization of Iron age pottery from eastern Turkey by laser- induced breakdown spectroscopy (LIBS)

Selected pottery sherds coming from the Ayanis, Dilkaya and Karagündüz excavations in eastern Turkey and dated from the Early to Middle Iron Age were examined as regards their composition by using laser-induced breakdown spectroscopy (LIBS). The objective of the study was first to investigate the potential of the LIBS technique in the compositional analysis of pottery and further to explore correlations in spectral data, by using chemometrics methods that would possibly enable discrimination among different sherds. This work is part of a broader study aiming to examine clay variability both before and during the Urartian State period and to explore possible relationships and differences among pottery objects from fortresses and settlements or settlements and cemeteries on the basis of the clay composition of sherds. Preliminary results demonstrate that by using the LIBS technique it is possible to analyse pottery sherds in qualitative and semi-quantitative ways, providing information on the clay and slip composition. Furthermore, encouraging results have been obtained by carrying out principal component analysis (PCA) on the LIBS spectra, which suggest that in certain cases, it is possible to directly correlate spectral information with the origin of pottery sherds.     

荆州博物馆文物展陈环境空气中真菌数量及其群落特征

存在于空气中的微生物种类极其丰富,空气中有害微生物对文物安全和游客健康构成威胁,国内外博物馆均开展了馆内空气微生物的研究。为研究荆州博物馆文物展陈环境空气中真菌数量及种群分布,调查潜在的有害微生物,采用自然沉降法对3个展柜及其所在的展厅进行空气真菌采样。对分离到的真菌菌株进行形态和分子鉴定,并分析群落分布特征。结果显示:展厅中真菌数量范围为17～74 CFU/m~3,展柜中真菌数量在12～21 CFU/m~3之间,青铜器和木漆器的展柜中真菌数量显著低于展厅(P0.05);纺织品展柜和展厅中真菌数量无显著性差异(P0.05)。共发现19属真菌,展柜空气中分离出8属真菌,展厅空气中分离出17属真菌。枝孢属(Cladosporium)和小球腔菌属(Leptosphaeria)分别占真菌总数的24.76%、22.86%,为优势真菌。枝孢属普遍存在于展厅和展柜中,小球腔菌属主要存在于展厅中,卵形孢霉(Oospora)和链格孢属(Alternaria)真菌为展柜特有菌。总体而言,荆州博物馆展陈环境中展厅真菌数量和种类多于展柜,木漆器展厅真菌数量最高,种类最丰富。博物馆展厅和展柜在6月和7月温度、相对湿度有利于真菌类微生物滋长,枝孢属和小球腔菌属作为展陈环境中优势菌属,在适宜的环境下,容易大规模生长,对文物或人体具有一定危害,可采取空气消毒措施。该研究结果对了解馆内空气污染现状,保护游客健康和文物安全具有重要的现实意义,可为馆藏文物的预防性保护提供科学依据。     

甘肃西戎墓出土“S”形金银铁饰件的显微观察与工艺初探

春秋战国时期是中国金属冶炼及铸造技术发展的重要阶段,这一时期装饰工艺主要有错金银和嵌金银等。近年来,甘肃地区相继发现了多处重要的西戎遗存,其中以宁县石家及遇村遗址和张家川马家塬遗址为代表。这些遗址中出土的金属质遗物提供了珍贵的实证资料,能够更为客观地反映出这一历史阶段的工艺水准。本工作以石家与马家塬两处遗址出土的“S”形金银铁饰件为研究对象,采用超景深显微镜、X射线荧光光谱仪及扫描电子显微镜等现代分析仪器,结合相关秦墓出土器物进行深入探讨。通过对2件“S”形金银铁饰件的分析,发现制作过程中采用“混汞法”工艺,在经过錾刻工艺加工后,饰件经过精细打磨而成。这一发现不仅揭示了这一时期金银铁饰件制作的工艺技术,还为后续研究提供了重要的历史参考依据,进一步丰富了对金银铁饰件物质文化及其制作工艺发展的理解。     

Sequential Incisions on a Cave Bear Bone from the Middle Paleolithic of Pešturina Cave,Serbia

We present the detailed analysis of a cervical vertebra from a cave bear, found at Pe?turina cave, Serbia, in a Mousterian archaeological level dated by radiocarbon at 43.5–44.6 kyr cal BP, and by ESR to between 93.5 and 102.5 kyr BP. Identified as a portion of the cranial articular facet, the fragment displays ten subparallel grooves. The microscopic study of these grooves and other surface modification present on the bone fragment, conducted with multifocus optical and confocal microscopes and complemented by a taphonomic analysis of the associated faunal assemblage, supports the hypothesis that the incisions were made by humans. Results are used to critically examine ambiguities implicit in the analysis and interpretation of early engravings, a category of material culture that has been playing a key role in the identification of early instances of symbolically mediated behavior.     

大都市边缘住宅开发区土地价值提升动态评估——以广州市南村住宅开发区为例

大都市边缘区住宅开发是大多数开发商的可能选择。此类开发区的土地利用性质和利用强度、地域空间结构及地理景观等方面都与城市中心区有着根本的区别,其价值处于高度动态发展中,地价迅速提升成为必然。本文首先剖析大都市边缘住宅区土地价值提升的可能性,并探讨了该类型的小区土地价值提升的评价思路、方法、对象及其参评指标体系确定等问题,最后将评估方法应用于广州市南村开发区进行了实例研究。     

The Limits of Turkish–Iranian Cooperation, 1974–80

Why did Turkey and Iran fail to become close partners in the 1970s even though they had compelling reasons to do so? This article argues that mutual distrust between Turkish and Iranian leaders, domestic turmoil in the two countries, and diverging geostrategic priorities undermined Ankara and Tehran's efforts to deepen their relations. While the shah of Iran saw his country as the policeman of the Persian Gulf and the Middle East, successive governments in Turkey continued to look west for their security. As economic and political turmoil engulfed the two countries, leading to a revolution in Iran in 1979 and a coup in Turkey in 1980, Iranian and Turkish leaders could not forge a lasting partnership.