饱水木器真空冻结干燥法中的预处理

目前我国对出土饱水木器(water-loggedwood)的脱水还很少用到冻结干燥法,因为目前我国还没有一套可投入使用的设备,所以对这方面的研究开展得甚少。 饱水木器在干燥过程中收缩变形的原因简而言之是水的表面张力所致,因而对出土饱水木器干燥技术的研究主要是解决如何消除干燥过程中水的表面张力对木器造成的影响。冻结干燥法的基本原理和过程为:先将要脱水的木器在-40℃左右的低温下冷冻,     

遗址中饱水木构件原址保护脱水技术研究

1遗址中大型饱水木构件文物目前国内出土的含有大型饱水木构件的遗址文化有十多处,其类型有：1．1古矿遗址湖北大冶铜绿山古铜矿遗址是含有大型饱水木构件的古矿遗址的典型代表。     

应用冷冻真空升华技术对出土漆器脱水的研究

冷冻真空干燥的原理:利用水分子能够直接从固体状态变成气体的原理,将古代饱水的木、漆器首先进行低温冷冻,然后在真空条件下升华干燥,使出土的古代饱水木、漆器达到脱水的目的。一研究对象漆杯豆 1957年河南信阳长台关楚墓出土,时代为战国早期。实物由中国历史博物馆提供(图一)。 (一)漆杯豆的质地与构造漆杯豆为木胎漆器,由杯、把、座三部分以榫卯结构组合而成。木胎厚重,经鉴定,木胎树种系楸木。漆膜较粗糙,地呈黑褐色,绘以朱色图案。     

出土饱水竹木器脱水保护研究

本文介绍用PEG一真空冷冻干燥法处理出土饱水竹木器的脱水原理,冷冻干燥中冷冻和升华条件,为了防止器物在冷冻过程中出现开裂,首先把器物用一定浓度的PEG水溶液含浸处理,然后进行真空冷冻干燥,使饱水木质文物脱水以达到稳定状态。同时对用PEG溶液含浸木器会使木器色泽加深等问题进行了研究。     

“潮湿有机考古材料保存的国际会议”在法国召开

“潮湿有机考古材料保存的国际会议”（WOAM）,于1998年10月19日至对日在法国的格勒诺布尔市（Grenoble）召开,会议聚集了来自世界23个国家的一百多名代表。会上宣读了47篇论文。会议分成两大部分,一部分是有关浸饱水木材和皮革文物的保存处理,另一部分是有关浸饱水漆器文物的保护处理。上海博物馆副研究员张岚宣读了论文“用PEG喷徐法保存嘉定出土的古船”,并受邀请在第二部分演讲了“中国出上浸饱水漆器的保存”,甘肃博物馆副研究员马清林博士宣讲了“中国北方出上漆器的保存技术：漆膜的软化方法的研究”,先后回答了代表的提…     

青海汉代漆奁的脱水报告

采用聚乙二醇滴渗喷涂、真空冷冻干燥等浸饱水漆木器的脱水处理方法,对北方干燥地区槽朽漆木器进行了脱水保存。处理后器物尺寸稳定,色泽良好,保持了原貌。     

襄阳文物考古研究所藏出土饱水木漆器保护与修复

本文介绍了对襄阳文物考古研究所105件出土饱水木漆器进行脱水保护、修复处理的技术路线及其基本方法,所有文物经脱水保护及修复处理均恢复了原貌。     

饱水木质文物的风冷干燥脱水研究

许多出土饱水木质文物因其降解严重、含水率较高,容易在脱水过程中出现不可逆的收缩变形以及开裂现象,从而遭到严重破坏。因此,饱水木质文物脱水方法的研究是文物保护工作中的重要课题。为探究风冷冷冻法对饱水木质文物脱水的效果,以一批无法复原的出土饱水木质文物为研究对象,在对其材种、含水率、基本密度及化学成分进行了测定和分析后,使用一台风冷电冰箱在-18℃条件下对样品进行了风冷干燥脱水处理,记录脱水时间和脱水效果,并分析了该方法的传质传热特点,证明了风冷干燥法用于饱水木质文物的脱水干燥能够取得良好效果,并且具有对文物干预小、适用性广、操作简便、成本低廉等优点,为饱水木质文物的脱水处理提供了一种新的思路。     

饱水文物传统脱水方法与超临界流体干燥技术的应用

饱水文物的脱水加固是文物保护中的一个重要组成部分,为了克服干燥应力引起的文物结构的收缩和塌陷,传统脱水方法中常采用加填充剂浸渍等方法,从而使文物处理周期延长。超临界流体干燥技术利用气体在临界温度以上无论加多大压力都不能液化的特性,控制饱水文物内部的液体在临界点之上,使气/液界面消失,在无液相表面张力情况下进行的干燥过程。本工作在回顾传统饱水文物脱水加固的常用方法和存在问题的基础上,利用液体表面张力与温度的关系,从理论上解释超临界流体干燥技术用于干燥饱水文物具有能消除干燥应力的特点,介绍了国外学者利用该技术实际处理饱水文物时采用的实验装置、操作条件和干燥效果。与传统脱水方法对照,超临界流体干燥技术还具有能缩短文物处理周期、干燥过程中能同时杀菌等优点。     

出土、出水饱水木质文物冷冻干燥研究进展

冷冻干燥是稳定出土、出水饱水木质文物的主要方法之一。该方法基于水由固态直接成为气态的升华过程不产生表面张力的原理,可避免饱水木材脱水时受到干燥应力的破坏。数十年来,经过实验实践和不断完善,冷冻干燥在出土、出水降解木材的稳定中取得了很好的效果,在大型、厚重木质文物的保护方面得到成功应用。本研究基于在出土、出水含盐饱水木质文物保护方面的多年实践,对国内外在脱盐、抗菌、热浸、预冻和升华干燥工艺等方面的进展进行了回顾,并提出了解决一些现有问题的技术设想。     

Telling small stories: spaces of knowledge and the practice of geography

This article examines how the practice of learning geography, and the arenas in which knowledge-making takes place, can be usefully positioned within changing histories of the discipline. It contends that networks of action – understood through the intersection of social sites, subjects and sources – present a conceptual framework and narrative focus for the re-consideration of specific episodes from geography's past. The interventions made here are informed and illustrated by a 'small story' about the doing of geography. Based on different personal accounts, the story revives a series of events, encounters, dialogues and images dating back to the winter of 1951 at Glenmore Lodge, Scotland. This educational institution in the Cairngorm mountains offered children from urban areas the opportunity to learn field studies and the skills of 'outdoor citizenship'. Initially, the focus falls on Margaret Jack, a 14-year-old field-course participant. Her learning experiences are traced through personal letters, a diary and a field journal dating from that time, and her recent recollections of this event. Margaret's account dovetails with the story of her field studies instructor, Robin Murray. Robin's role is traced through his learning experiences as a geography undergraduate at Aberdeen University, and the recent recollections of Catriona Murray, his wife.     

Das Wissen der Schulden. Recht,Kulturtechnik und Alltagserfahrung im liberalen Kapitalismus

The Knowledge of Debt: Law, Media Technique, and Everyday Experience in Liberal Capitalism. Performing an object such as ‘the economy’ hinges on practices of formatting knowledge. The article proposes to look at such instituting moments in connection with social conflicts over the legitimate rules of exchange. This is exemplified by way of recounting the story of the codification of Swiss bankruptcy law in 1889. In order to homogenize the legal procedures of debt collection and bankruptcy, two subject categories were instituted: ‘merchants’ and ‘non-merchants’. These different categories were thought to account for the diverging temporalities and spaces of credit exchange in everyday economic life. The introduction of the commercial register, a media-technical apparatus, enabled a formal distinction between ‘merchants’ and ‘non-merchants’. However, this boundary was contested and proved to be porose.     

Two radiocarbon dates for freshwater shells from hierakonpolis: Archaeological and geological interpretations

Shells of two species of freshwater bivalve (Unio willcocksi Bullen Newton and Etheria elliptica Lamarck) from the predynastic Gerzean (Nagada II) Decorated Tomb at Hierakonpolis, Egypt have given dates of 5000±90 bp for the tomb, and 12,900±120 bp for an episode of Nile terrace accumulation (correlated here with the Sahaba-Darau aggradation event). The archaeological and geological significance of these results is discussed, together with an outline of problems associated with radiocarbon dating of shell. Comparisons are made with the few other radiocarbon dates available for the Predynastic period in Egypt and possible reasons for the presence of shells in the tomb are considered.     

Studies on amerindian dogs, 1: Carbon isotopes in relation to maize in the diet of domestic dogs from early Peru and Ecuador

Work initiated purely as a dating project in support of a craniometric and morphological investigation of domestic dogs from early Peru has proved to have much wider implications. The stable carbon isotoperatios (¹³C/¹²C) of hair samples from ten dogs show that maize formed a significant part of their diet. Radiocarbon dates for these remains have confirmed that they belong to the period well after the cultivation of maize was first established. Stable carbon isotope measurements can thus be used to test for the presence of maize as a dietary constituent at earlier sites even where there is otherwise only indirect evidence for its cultivation. Collagen from animal or human bone is a suitable alternative to hair for this purpose and the method has been successfully applied to collagen dating to c. 3000 BC from the Valdivia culture site of Real Alto, Ecuador, as well as to a series of early Peruvian dogs.     

Hospital Drama: Visual Theatres of the Medical Rendezvous from Asylum to Hospital with Reference to Specific Works by Anna Furse

Abstract

This paper is informed by Furse’s practice as a theatre maker in two fields of output that are connected by two factors: first, the presence of the woman patient — hysteric/subfertile respectively — within the clinical gaze; second, the significance of the womb to each pathology. In the treatment of each (explored in Furse’s theatre), lens based technologies play their part, whilst the cultural and medical can be seen to have overlapped to produce specific meaning with regard to Her body and its spectacularity. The article presents an overview of some of the key issues in precisely how the woman’s body becomes spectacular within this prosthetic medical gaze and how the medical — and theatrically designed spaces to represent these — become meaningful and potent proxemics that in turn inform medical/ theatrical spectatorship. Overarching nineteenth-century protocols at the Salpêtrière Hospital in Paris (where Furse’s Augustine (Big Hysteria) is set) to contemporary imaging technologies used in the treatment of subfertility with Assisted Reproduction Technologies (the topic of her Art of A.R.T. projects), it examines the way in which photography develops through cinema to X-Ray, ultrasound and then 3D/4D ultrasound to ‘capture’ the woman’s body in ways by which she becomes muted and exposed. These occular technologies that extend the gaze, first to an exterior subject and then, eventually, traversing the flesh without knife, lend specific performativity to the ‘patient’ women, within the context of hysterias and reproductive impairments respectively. Finally, issues of suspension of disbelief are addressed. The spectator’s faith in the screen-based image of Her spectacular body is interrupted in Furse’s work, which is also keenly interested in the effect of such imagery on the woman’s sense of Self. The historical and cultural leaps in this article argue that there is indeed a trajectory through the history of medical imaging since the first application of photography to anatomy to the more advanced scoping technologies of medical imaging today, and that in each era, the production of these images remain fraught with cultural implications.     

The Death of Alexander the Great – A Spinal Twist of Fate

Alexander the Great died in 323 B.C. from an unknown cause. Physical depictions of this historical figure reveal the likelihood of a cervical scoliotic deformity. This is substantiated with the medical history and is correlated with his untimely death. For the first time, it is concluded that Alexander’s death may have ensued from the sequelae of a congenital scoliotic syndrome.     

Some chronological implications of a fossil molluscan assemblage from a neolithic site at Brook,Kent, England

The later post-glacial history of a valley in the chalk escarpment near Brook, Kent, is described, based on molluscan stratigraphy, archaeological evidence and radio-carbon dating. Differences in size and colour banding, respectively, of fossil and living representatives of two species of land snails, Pomatias elegans (Müller) and Cepaea nemoralis (L.), are correlated with climatic change during the post-glacial period. The problems of the use of fossil shells of these species as samples for radiocarbon dating are discussed.     

Of BRICs and Brains: Comparing Russia with China,India, and Other Populous Emerging Economies

A noted British economic analyst and observer of current developments in Russia compares that country's emerging economy with those of China, India, eight other populous emerging states, and the United States. The focus of the comparison is on the extent to which these countries exhibit potential for functioning as "knowledge-based" economies. The four pillars of such economies are identified as: (1) an educated and skilled population; (2) a network of R&D institutions; (3) a dynamic information infrastructure; and (4) a regime promoting the development of knowledge. Journal of Economic Literature, Classification Numbers: L86, O30, O57. 1 figure, 19 tables, 91 references.     

The Rise and Fall of Alexander the Great – The Need for Medical Analysis: Reply to Commentaries

Alexander the Great died in 323 B.C. from an unknown cause. By elucidating the nature of his death, we can better interpret various aspects of Alexandrian history. Alexander’s death may have ensued from the sequelae of a congenital scoliotic syndrome. It would therefore be of significance to note that one of the greatest leaders in history who conquered much of the then known world may have been suffering from a physical disability.