甘肃出土糟朽木器环境腐蚀作用与机理研究

甘肃独特的地理、气候环境,一般考古出土木器都具有糟朽木器的典型特征,通常器物因木质结构与形态的脆弱性易受外部因素侵蚀而受损,而其腐蚀状况或发生腐变往往与其所处的埋藏环境、发掘现场和博物馆馆藏环境有关。鉴于目前甘肃糟朽木器的保存状况,通过甘肃糟朽木器埋藏环境、馆藏环境及影响因素调查,馆藏环境腐蚀作用与机理的科学剖析,全面、客观和准确地揭示了藏品腐蚀受损根源及原因。环境腐蚀作用的机理如下：1）可见光、紫外线腐蚀机理是,在光辐射的作用下,纤维素发生初始光化学反应造成链断裂,并伴随产生多种化合物。2）纤维素在常温下是很稳定的,但随着温度的升高,其强度相应降低,在高温光照和氧存在的情况下,会发生氧化反应;在水分、可见光、氧气、酶及酸碱等因素同时存在情况下,温度偏高则对糟朽木器材质腐蚀起着加速作用。3）可溶盐对糟朽木器材质的腐蚀作用是通过自身的潮解和结晶过程来完成的。4）害虫及霉菌、微生物对木质文物的腐蚀作用,主要是通过分泌各种生物酶来分解木质成分中有机质实现的。5）当空气中的湿度达到70％时,灰尘及粉尘会发生潮解,当沉降在糟朽木器表面时,会引起木质纤维素腐蚀和降解。     

THE TINY PAINTINGS OF THE BUDDHIST WORLD——A RECORD OF LIU ENJUN AND HIS TSAKA PAINTINGS

<正>EDITOR'S COMMENTARY This special column consists of devoted fans of Tibetan culture. They have spent their life,their energy and their finances to eagerly collect and preserve unique Tibetan traditional culture while virtually also enjoying the spiritual and material happiness which those treasures bring to them.From now on,this journal is going to invite Chen Dan to contribute her detailed and delicate stories about collectors of Tibetan artifacts one by one,     

PASANG TSERING AND HIS FOLK ART TROUPE

Although Lhozhag County is a border county in Tibet Autonomous Region,it is enriched with deep traditional culture.Many traditional folk arts are in full vigor,such as traditional dances,like the laymen Chamo from the town of Lhakhang,Lugu Lhamo from Dzari,Goshe,andalso Godrang.     

历史文化因素对广州市商业业态空间的影响

论文通过考察历史区位和社会文化对广州市商业业态空间的影响,分析了城市商业区对商业文化的继承和创新方式,并总结出其在地域空间上的表现特征。     

JIN ZHIGUO AND HIS TIBETAN KNIVES

On a sunny afternoon,40 years ago,several Tibetan herdsmen were sitting cross-legged and dice in the yard of a Tibetan-style inn situated to the east of the Potala Palace.A teenage Han Chinese boy walked up to them and his eyes were drawn to a shining knife half-hidden in the leather Tibetan robe     

浅析古籍目录中子部农家类与谱录类之关系

编者按:国家图书馆古籍收藏分为善本古籍和普通古籍两部分,各使用一种分类法,现在为编制古籍书目数据库,需统一分类法.为此,本馆专门组成"四部分类法的应用及其类目"课题组.课题组对四部类目的沿革流变、优劣短长、增删损益进行了较为深入的研究.为使调整后的类表更加科学,更具普遍意义,课题组选择了部分历来变化比较复杂的类目予以剖析.在此先刊出其中三篇,诚望方家指正.