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培養箱的用途有那些

更新時(shí)間:2011-11-29      點(diǎn)擊次數:519

培養箱是培養微生物的主要設備,可用于細菌,細胞的培養繁殖。其原理是應用人工的方法在培養箱內造成微生物和細胞,細菌生長(cháng)繁殖的人工環(huán)境,如控制一定的溫度,濕度,氣體等。目前使用的培養箱主要分為四種:直接電熱式培養箱,隔水電熱式培養箱,生化培養箱和二氧化碳培養箱。
(一)生化培養箱    這種培養箱同時(shí)裝有電熱絲加熱和壓縮機制冷。因此可適應范圍很大,一年四季可保持在恒定溫度,因而逐漸普及。
該培養箱使用與維修保養類(lèi)似電熱式培養箱。由于安裝有壓縮機,因此也要遵守包包、冰箱保養的注意事項,如保持電壓穩定,不要過(guò)度傾斜,及時(shí)清掃散熱器上的灰塵等。
(二)電熱式和隔水式培養箱    電熱式和隔水式培養箱的外殼通常用石棉板或鐵皮噴漆制成,恒溫培養箱內層為紫銅皮制的水的方夾層,電熱式培養箱的夾層是用石棉或玻璃棉等絕熱材料制成,以增強保溫效果,培養箱頂部設有溫度計,用溫度控制自動(dòng)控制,使箱內溫度恒定。隔水式培養箱采用電熱管加熱水的方式加溫,電熱式培養箱采用的是電熱絲直接加熱,利用空氣對流,使箱內溫度均勻。
在培養箱內的正面側面,有指示燈和溫度調節旋鈕,當電源接通后,紅色指示燈亮,按照所需要溫度轉動(dòng)旋鈕       至所需刻度,待溫度達到后,紅色指示燈熄滅,表示內已達到所需溫度,此后箱內溫度可靠溫度控制器自動(dòng)控制。
 

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