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理學院
物理學系
學位論文
學位論文
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http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/73905
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search.filters.author.Hwang-Jye Yang
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search.filters.author.楊黃捷
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search.filters.subject.UV
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search.filters.subject.AFM
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search.filters.subject.E. coli
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search.filters.subject.原子力顯微鏡
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search.filters.subject.大腸桿菌
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利用原子力顯微鏡研究紫外光殺菌之衰亡機制
(
2010
)
楊黃捷
;
Hwang-Jye Yang
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細菌是許多疾病的成因,由於傳統殺菌方法都有一定的限制,故發展新的殺菌方法是我們的目標。脈衝激發拉曼散射能突破傳統殺菌方法的限制,為殺菌作業提供了一個嶄新的方法。本文除了為脈衝激發拉曼散射殺菌法提供前置作業外,最大的目的在於探討紫外光對細菌的影響。我們將利用原子力顯微鏡觀察大腸桿菌經過紫外光照射後菌體外形的變化,並根據統計結果提出合理的衰亡機制。實驗結果顯示,在時間模式的操作下,幾乎所有的大腸桿菌都有中央塌陷的現象,且隨著照射時間越長,塌陷的深度越深,但菌體的長度越短,我們認為是細胞膜受到破壞的緣故;而隨著照射時間的增加,兩端的峰值會越高,我們則懷疑是膜上電荷重新分配所造成的排斥現象。
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