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【环球网报道实习记者李婷婷】据韩联社8月28日报道,韩国首尔大学保健研究生院教授研究小组28日发布的一项分析结果称,韩国与日本空气超细颗粒物(PM2.5)中的细菌有73%相似,与中国的相似度为83%,但细菌具有可移动性,很难判断韩国的细菌来自中国。
研究小组耗时一年,分别采集首尔大学、北京大学、长崎大学建筑物屋顶上的细颗粒物后,从中提炼细菌DNA,分析其碱基顺序发现,北京和首尔的浮游细菌多样性比长崎分别高出1倍和0.5倍。
三个城市的细颗粒物中变形菌门、硬壁菌门、放线菌门占67.3%,都是可在人体内发现的菌群。北京与首尔的菌种相似度达83%,首尔与长崎的相似度为73%。从季节来看,冬季与春季的相似度较高,夏季较低。
研究小组分析认为,这是由冬季与春季从西伯利亚地区吹来的西北风造成的。冬季湿度较低,地表干燥,导致细菌多漂浮在空中。
参与研究项目的首尔大学保健学院教授金皓表示,分析东亚三个主要城市空气中细颗粒物的细菌多样性和相似度具有重要意义,但从气象学角度来看,细菌具有可移动性,难以判断是否是中国的细菌飞到韩国和日本,对此有必要进行进一步研究。
(原标题:韩研究小组:很难判定韩国超细颗粒物细菌来自中国)
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