在线国产一区二区_成人黄色片在线观看_国产成人免费_日韩精品免费在线视频_亚洲精品美女久久_欧美一级免费在线观看

chinadaily.com.cn
left corner left corner
China Daily Website

Terracotta Warriors cry out for clean air

Updated: 2013-03-04 11:05
By Cheng Yingqi ( China Daily)

Terracotta Warriors cry out for clean air

New system can shield national relics from damage by pollution.

Even the Terracotta Warriors are feeling the effects of China's choking air pollution.

Chinese scientists have found that the indoor environment where the Terracotta Warriors are housed could cause them to deteriorate, prompting some scientists to raise the idea of using air curtain technology to help control the environment in the pits.

Terracotta Warriors cry out for clean air

Heritage being nursed back to health 

Terracotta Warriors cry out for clean air

 Beast stone

In early February, Gu Zhaolin, a professor at Xi'an Jiaotong University, and his team published a paper in Environmental Science and Technology, a prominent journal under the American Chemical Society, which showed the results of a research project sponsored by the Ministry of Science and Technology to develop a system to maintain a comfortable environment for the Terracotta Warriors.

An air curtain looks similar to household air conditioners. The machines eject a powerful airflow, which forms a sheer air layer that separates the environment on the two sides.

"When you are shopping in the supermarket, you might have seen those freezers without a cover. The reason that the temperature in the freezers is lower than the outside is that they have the air curtain, which you cannot see but does exist, to prevent the exchange of air and heat," Gu said.

"The air curtain is just like other barriers, for example a glass wall. It can prevent more than 90 percent of the pollutants in the air from entering the pits," he said.

Installing an air curtain inside the pits could protect the Terracotta Warriors and other pottery relics from further damage, Gu told China Daily.

Major environmental factors affecting the relics include temperature, humidity, air pollutants, lighting, dust and mold.

Ma Tao, deputy director of the Shaanxi Provincial Institute for the Conservation of Cultural Heritage, told China Daily that the pollutants from visitors and atmospheric pollution could penetrate the enclosed hall and cause the relics to deteriorate. Ma is a co-author of the paper published in Environmental Science and Technology.

"For example, automobile exhaust includes pollutants such as hydrocarbon compounds, nitrogen oxides and sulfur dioxide, and when it penetrates the Terracotta Warriors, it decomposes the pigments on the surface, then it deposits and continues to erode the pottery," Ma said.

Previous Page 1 2 3 Next Page

8.03K
 
 
...
...
...
主站蜘蛛池模板: 99亚洲精品| 希岛爱理在线 | 色综合五月天 | 黄色大片免费观看 | 成人在线小视频 | 一级黄毛片 | 日本加勒比在线观看 | 欧美在线观看一区二区 | 亚洲午夜18毛片在线看 | 91久久久久 | 久久机热 | 一区二区不卡视频 | av片在线免费观看 | 高潮毛片又色又爽免费 | 玉足女爽爽91 | 人人澡人人干 | 日本亚洲天堂 | 欧美日韩免费一区二区三区 | 国产盗摄一区二区 | 日本一区二区不卡视频 | 亚洲免费视频观看 | 亚洲精品乱码久久久久久蜜桃91 | 黄色国产视频 | 欧美精品色| 婷婷狠狠| 91国内在线| 伊人激情网 | 亚洲色在线视频 | 国产欧美成人 | 久色成人 | 99久久婷婷国产综合精品草原 | 色综合一区二区 | 久久精品视 | 成人在线国产 | 亚洲啊v | 欧美做受69 | 精品国产三级 | 久久综合久 | 日韩福利在线 | 国产主播99 | 国产黄色在线 |