聚对二甲苯在文物、图书加固保护中的应用

介绍了新型聚合物保护剂──聚对二甲苯的特性和对文物、图书的加固保护,测定了保护后的加固强度、吸水性、防霉性、防腐性,并进行了加速老化试验。     

故宫建福宫石质文物保存状况的评价研究

故宫建福宫遗存了大量石质构件,其风化现象比较严重。为评价其保存状况,对建福宫石质构件的划痕宽度、回弹性能、自由渗水率、表层波速与透射波速进行取点测试,与新鲜石材数据对比后,证实其风化程度比较严重,需要进行后续的保护处理。同时还对影响建福宫石质构件风化的环境因素进行测试分析,研究了环境因素与石质构件保存状况的关系,为病害分析乃至保护操作提供了数据及理论支持。     

龙门石窟地面、门槛雕刻保存现状调查研究

通过查阅文献、现场调查、病害分析和比较研究,发现龙门石窟洞窟的地面、门槛及其雕刻病害类型多样,劣化严重。在总结其病害现状和保存特征的基础上,分析其保护经验和不足,提出了修造保护层、疏导积水、修复加固和规范化管理等保护策略和措施。     

Engagement and Management: Developing a Monitoring System for Open-air Rock Art in the UK and Ireland

ABSTRACT

Neolithic and Early Bronze Age rock carvings in the United Kingdom and Ireland represent an internationally unique rock art tradition as it is, to the best of our knowledge, the only wholly abstract global rock art tradition. This heritage resource is, however, under threat from an array of factors, such as increasing population densities and agricultural intensity. In this paper, we report on the Condition Assessment Risk Evaluation (CARE) project that had as one of its primary objectives the co-production of a user-friendly, non-invasive condition assessment risk evaluation Toolkit for gathering and organising information essential for the long-term conservation of open-air rock art. We describe the public involvement CARE process through co-experience participatory focus groups, which evaluated the Toolkit, concluding that we can have confidence in the results obtained from the public. Furthermore, the variables that form part of the Toolkit and related management recommendations are presented.     

A Polluting Concept of Culture: Native Artefacts Contaminated with Toxic Preservatives

This research examines the practical and theoretical fallout of the toxic methods used by museum conservators to preserve native artefacts and regalia. These conservation practices, dating to the late 19th and early 20th centuries, were undertaken before the age of museum professionalisation and within a larger context of cultural assimilation. Many of these chemical preservatives produce the same harmful effects in humans as they do in the organisms they were designed to eradicate. As these contaminated artefacts are repatriated, members of native communities who attempt to reintegrate them into ceremonial and daily practice are put at significant health risk. Not only do these pollutants undermine the stated goals of repatriation but they also stand as a literal instance of the way in which a hegemonic and interpreting culture has metaphorically contaminated the culture it has purported to preserve and display.     

Assessing natural variation and the effects of charring,burial and pre-treatment on the stable carbon and nitrogen isotope values of archaeobotanical cereals and pulses

The aim of this study is to assess the potential of charred archaeobotanical cereal grain and pulse seed δ¹³C and δ¹⁵N values to provide evidence of crop growing conditions and as a potential component of palaeodietary studies. In order to reliably interpret archaeobotanical δ¹³C and δ¹⁵N values it is necessary to take into account the impact of charring, burial and laboratory pre-treatment procedures. We examine the effects of charring and burial on bulk δ¹³C, δ¹⁵N, %C, %N and C:N ratios in modern cereal and pulse material, and of cleaning by acid–base–acid (ABA) pre-treatment on modern and archaeobotanical charred material. Our study utilised bulk grain and seed samples to help account for within-ear/pod and between-plant variability in δ¹³C and δ¹⁵N values. Heating at relatively low temperatures and for prolonged times (230 °C for up to 24 h) is conducive to the formation of well preserved, undistorted charred cereal grain and pulse seed. Heating for 24 h has a systematic and predictable effect on δ¹⁵N values, with increases of around 1‰ on average in cereal grains and pulse seeds, and no consistent impact on δ¹³C values. Increases in δ¹⁵N are likely due to the loss of lighter ¹⁴N via N-containing volatiles. Burial (for up to 2 years) and ABA pre-treatment have no significant effects on δ¹³C or δ¹⁵N values. After pre-treatment, however, the %C and %N contents of the archaeobotanical material more closely resembles that of the modern charred grains and seeds, suggesting that archaeobotanical remains accumulate non-structural material during burial but retain their original carbon and nitrogen content. Therefore %C, %N contents and C:N ratios can provide useful criteria for assessing archaeobotanical preservation.     

A high-resolution electron microscopic and energy-dispersive spectroscopic study on the molecular mechanism underpinning the natural preservation of 2300 Y.O. naturally-mummified human remains and the occurrence of small-sized [Zn][Al]Carbon spheres

In this paper we use Scanning and Transmission Electron Microscopy, and Energy Dispersive Spectroscopy to characterize the surface of the skin of a 2300 YO, naturally-preserved mummy, belonging to a two-year and eight month girl (“Pepita”), found inside a cave located in Altamira, Querétaro, México (21°40′–20°01′; 99°03′–100°36′). The cave was found in Sierra Gorda, an orographic region with a relief of sedimentary origin from the Gulf of Mexico, composed by high mountains with altitude values surpassing 3000 m above sea level, with ample and steep canyons, and a prominent role on the exploitation and distribution of cinnabar (HgS). The skin showed the presence of small-sized spherules, containing Al (≤43%) in the most exposed region (5–10 μm depth). Thin layers and structural microdomains covered small and large spheres. Structures conformed by stacked, nano-sized particles located far-from-the bunches contained C (≤45%), Zn and Si (≤10%), and minor amounts of Ca (≤2.6%). By contrast, regions between spheres contained high amounts of Ca (≤23%) and Al (≤15%), but lacked Zn and Si. Carbon spheres showed two distinctive composition, a signature that their formation might have occurred in a least two different stages via concentric growth mechanisms, with the incorporation of Zn and Al at a later stage. [Zn][Al]Carbon spheres showed morphology and growth patterns that compared to those resulting from the hydrothermal carbonization by Fe²⁺ ions under mild conditions, suggesting a common mechanism of formation. Textural changes of thin films found between [Zn][Al]Carbon spheres were attributed to differences in viscosity, which might have contributed to increases in functionality and specific surface area (by means of decreases in size) and, in turn, facilitating the sequestration of biomolecules. We propose that the presence of [Zn][Al]Carbon spheres provides protection against bacterial and UV attack. The physical properties of these spheres helped entrap biomolecules. Taken together, these factors contributed to the preservation of Pepita.     

Archaeology in the Context of War: Legal Frameworks for Protecting Cultural Heritage during Armed Conflict

International law provides for a framework for protecting cultural heritage during armed conflict and for punishing those who transgress these principles. If understood within its limitations of dependence on state ratification and enforcement, international law protects cultural heritage by providing guidelines to those who wish to conform and by punishing after the fact those who deliberately destroy cultural heritage. Recent movement toward ratification of the 1954 Hague Convention for the Protection of Cultural Property in the Event of Armed Conflict and its protocols by the major military powers should afford greater protection to cultural heritage in future conflicts.     

创建荒野:印第安人的移徙与美国国家公园

当代环境保护运动是从美国对自然环境变化、全球工业化扩张与政治现代化过程的独特响应中发展起来的。从环保运动中涌现出了一种全新的自然观念,其中包含着基于种族移徙的荒野思想。这种荒野观允许白人为了娱乐消遣和静默冥想的目的而排他性地占用人迹杳然的荒野,并且将这种做法视为天经地义。把人类活动排除在外的荒野观对于美国和国际社会的国家公园和荒野区域的建立影响深远。当世界各地的土著居民们宣称拥有公园土地所有权和资源使用权时,前述荒野观便引发了诸多冲突。     

青海省大学生社团发展现状与对策

文章通过分析高校大学生社团的作用,剖析大学生社团发展中存在的问题,提出了解决这些问题的方案与对策,以促进大学生社团的健康发展,充分发挥其重要作用。