August 2, 2011

省錢防蚊妙招

夏天到了,許多積水容器容易滋生孑孓長蚊子,成了登革熱的溫床,今天教你一個小撇步?只要在容器裡面,投入4枚硬幣,就可以殺死孑孓,這是高雄市七賢國小的學生參加科學展覽的作品,學生實驗發現,硬幣會釋放出硫酸銅,因此造成孑孓死亡,民眾如果在家有水池造景或者盆栽,不妨這樣做,而且只要3天,就會有成效。


許願池裡推滿硬幣,不過你知道嗎,原來將硬幣放在池子裡不僅有許願意義,有學生發現,這還是防蚊的小撇步。獲獎學生陳沛羽:「一開始覺得很噁心,那如果我們一直做實驗,就會覺得牠好可愛。」

3位才年僅11、12歲的國小生,從電視中得知,銅可以抑制孑孓生長,又發現許願池少有孑孓,於是做硫酸銅和硫酸鎳的實驗,還曾經為此培育了上千隻孑孓,嚇壞了周遭朋友,反覆測試,證實"銅"的確是抑制的重要關鍵,而1元和50元硬幣含銅量高達90%,將3000C.C.的水放入4枚1元硬幣,靜置2、3天,的確就能有效抑制孑孓生長。

獲獎學生林炅霆:「但是如果有些花器是必須一定要有水,就可以放置1元硬幣在裡面,如果在裡面產卵,那孵化出來也會馬上死掉。」

個個臉上露出笑容,成功的實驗也讓他們在科展中一舉奪冠,他們也將硬幣放在學校盆栽或蓄水容器中,成了現成且低成本的滅蚊幣,也替夏天的防蚊大作戰,多了省錢新妙招。


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