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您當前的位置:主頁 > 故事 > 其他 > 科學家發現34億年前微生物化石 當時還沒臭氧層

科學家發現34億年前微生物化石 當時還沒臭氧層

發布日期:2016-01-01 參考消息 ibufuzao
科學家發現34億年前微生物化石 當時還沒臭氧層

參考消息網12月31日報道 西媒稱,德國和瑞士科學家找到了地球34.3億年前存在微生物生命體的證據。這些躲在地下洞穴中的微生物成功躲避了紫外線的過度照射。此項研究成果已發表在美國《地質學》月刊上。(精品書摘 www.2009du.com)

西班牙《阿貝賽報》網站12月28日報道稱,科學家在研究報告中詳細陳述了這些細胞化石所在的位置、研究人員所用的檢測技術以及此項新發現的重要性。

科學家認為,地球從距今40億至35億年的太古宙時期開始就存在生命。當時地球還沒有臭氧層,無法過濾掉大部分紫外線,而且大氣層中也沒有用于呼吸的氧氣。這就意味著,這些微生物為了繁衍生息不得不尋找一個遮蔽之所。研究人員認為,它們成功地找到了“避難天堂”。

這些微生物的化石是在南非巴伯頓的綠巖帶發現的。古微生物在潮汐過后留下的沉淀物中找到可以藏身的洞穴,而這些洞穴是由氣泡形成的。這些細胞化石可以追溯到32億年前,位于一個微生物席之下。科學家認為,這個微生物席是在火山活動的作用下被推到地表的。

研究小組利用顯微拉曼光譜儀多次進行測試,結果發現這些微生物外形細長,而且和很多現代細菌一樣,以成串的方式生長。

科學家還指出,這些微生物的形狀相當統一,能夠控制自己的直徑和長度。這些細胞化石的年齡比過去在生存環境當中發現的任何化石都要大5億歲,最年長的大約有34.3億歲。這就意味著,早在34.3億年前,地球上就有微生物生命體存在。

有趣的是,研究人員還指出,最早出現生命體時的地球與現在的火星非常相似。此項新發現或將為人類在火星上尋找生命體的科學探索提供一些啟示。

搜索閱讀:微生物生長曲線,大家好,,我做微生物生長曲線,得到好多數據(每次6個重復、4個平行樣,還有一個空白對照),數據測出來了,,現在不知道怎么處理。所以請大家幫幫忙,指點一下。。。,2015年藥典微生物,與2010版藥典相比,2015版藥典中將改良馬丁培養基、營養肉湯和營養瓊脂,修訂為胰酪大豆胨液體培養基、胰酪大豆胨瓊脂培養基、沙氏葡萄糖液體培養基和沙氏葡萄糖瓊脂,科學家根據猛犸的化石,(化石網報道)據騰訊科學(悠悠 編譯):3月16日,西伯利亞一所大學召開學術討論會,一支專家小組表示,從滅絕猛犸尸體左前腿成功提取骨髓樣本,它將在,爾雅微生物與人類健康,南開大學15春學期《微生物與人類健康(爾雅)》在線作業 1一、單選題 1. 地衣是真菌和什么生物的共生物?A. 草類B. 蕨類C. 藻類D. 動物幼蟲正確答 ,科學家是怎樣發現化石,根據恐龍逐步演變過程,結合生物演變的理論,在研究恐龍和鳥類一系列化石之后,進行推想,得出恐龍最后變成了鳥類的這個過程.微生物與人類的關系,微生物與人類的關系 課件,試卷,教案,素材,學案精品資源收費、免費下載, 微生物與人類的關系 上傳會員:mxyfafa [會員其他資料] 審核人:文武 [管理員,臭氧層是哪一年發現的,1840年德國C.F.舍拜恩在電解稀硫酸時,發現有一種特殊臭味的氣體釋出,因此將它命名為臭氧。當大氣層中的氧氣發生光化學作用時,便產生了臭氧,因此,在離,中國發現最早人類化石,該園古生態組研究人員日前在英國《科學報告》雜志上發表題為“中國西南化石證明:桃子比人類先達”一文,宣布在中國西南發現世界上最早的桃核化石,將桃子,微生物在農業上的應用,一、在農業種植上面的應用: EM原露中微生物的群體連攜作用,可以改善土壤環境,抑制有害微生物,豐富有益微生,古代人發現恐龍化石,古代挖到的龍骨就是化石啊,不過古代的人對生物學研究的不是很透徹,所以就算里面夾雜著恐龍化石他們也不認識,恐龍這個學名還是十九世紀誕生的!日本發現特大恐龍化石,949健康網編輯組稿: 日本發現特大恐龍化石,南極洲發現了恐龍化石,最早發現恐龍化石,誰第一個發現恐龍化石,發現恐龍化石視頻,探索,純化水微生物限度檢查,純化水微生物限度檢測_醫藥衛生_專業資料。純化水微生物限度操作規程 純化水微生物限度操作規程文件編號 制訂部門 起草人 起草日期 總頁數 實施日期 ,

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【日本發現特大恐龍化石 科學家發現34億年前微生物化石 當時還沒臭氧層|古代人發現恐龍化石|科學家是怎樣發現化石】
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