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2010
4-10
微生物菌種保藏方法及注意點1、傳(chuan)代保(bao)存(cun)(cun)法(fa):有些微(wei)生(sheng)(sheng)物(wu)當遇到冷凍或干(gan)燥等處理時,會(hui)很快(kuai)死亡,因此在(zai)這種情況下,只能(neng)求助(zhu)于傳(chuan)代培(pei)養(yang)(yang)(yang)保(bao)存(cun)(cun)法(fa)。傳(chuan)代培(pei)養(yang)(yang)(yang)就是要定(ding)期(qi)地進行(xing)菌種轉(zhuan)接、培(pei)養(yang)(yang)(yang)后再保(bao)存(cun)(cun),它是zui基本的(de)微(wei)生(sheng)(sheng)物(wu)保(bao)存(cun)(cun)法(fa),例如(ru)酸奶等常(chang)用生(sheng)(sheng)產菌種的(de)保(bao)存(cun)(cun)。傳(chuan)代保(bao)存(cun)(cun)時,培(pei)養(yang)(yang)(yang)基的(de)濃度不宜過高,營養(yang)(yang)(yang)成分不宜過于豐富,尤其是碳水化合物(wu)的(de)濃度應在(zai)可能(neng)的(de)范圍內盡量(liang)降低(di)。培(pei)養(yang)(yang)(yang)溫度通常(chang)以稍低(di)于zui適生(sheng)(sheng)長(chang)溫度為好...
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2010
4-9
電子恒溫水浴鍋操作注意點電子(zi)恒(heng)(heng)溫(wen)(wen)水(shui)(shui)(shui)(shui)浴(yu)(yu)鍋安全操(cao)作1電子(zi)恒(heng)(heng)溫(wen)(wen)水(shui)(shui)(shui)(shui)浴(yu)(yu)鍋應放(fang)在固定平臺(tai)上(shang),先將(jiang)排水(shui)(shui)(shui)(shui)口的膠管夾(jia)緊,再將(jiang)清水(shui)(shui)(shui)(shui)注入水(shui)(shui)(shui)(shui)浴(yu)(yu)鍋箱體內(為縮(suo)短升溫(wen)(wen)時間,亦可注入熱(re)水(shui)(shui)(shui)(shui))。2接通電源,顯示(shi)OFF的紅色指示(shi)燈(deng)亮,旋(xuan)轉溫(wen)(wen)度(du)調節(jie)旋(xuan)鈕至(zhi)設定的溫(wen)(wen)度(du)(順時針(zhen)升溫(wen)(wen),逆時針(zhen)降溫(wen)(wen)),水(shui)(shui)(shui)(shui)開始(shi)被加熱(re),指示(shi)燈(deng)ON亮;當溫(wen)(wen)度(du)上(shang)升到設定溫(wen)(wen)度(du)時,指示(shi)燈(deng)OFF亮,水(shui)(shui)(shui)(shui)開始(shi)被恒(heng)(heng)溫(wen)(wen)。3水(shui)(shui)(shui)(shui)浴(yu)(yu)恒(heng)(heng)溫(wen)(wen)后(hou),將(jiang)裝有待恒(heng)(heng)溫(wen)(wen)物品的容器放(fang)于水(shui)(shui)(shui)(shui)浴(yu)(yu)中開...
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2010
4-8
室內環境檢測采樣規則及注意點室(shi)(shi)(shi)內(nei)環(huan)境(jing)檢測采樣規則1.0.4民(min)用(yong)建(jian)筑(zhu)工(gong)程根據(ju)控制室(shi)(shi)(shi)內(nei)環(huan)境(jing)污染的不同要(yao)求,劃分為以下(xia)兩類(lei):1、Ⅰ類(lei)民(min)用(yong)建(jian)筑(zhu)工(gong)程:住宅、醫院、老年建(jian)筑(zhu)、幼兒園、學校教室(shi)(shi)(shi)等民(min)用(yong)建(jian)筑(zhu)工(gong)程;2、Ⅱ類(lei)民(min)用(yong)建(jian)筑(zhu)工(gong)程:辦公(gong)樓(lou)、商(shang)店、旅館(guan)(guan)、文化(hua)娛樂場所、書店、圖書館(guan)(guan)、展覽館(guan)(guan)、體育(yu)館(guan)(guan)、公(gong)共交(jiao)通等侯室(shi)(shi)(shi)、餐廳、理(li)發店等民(min)用(yong)建(jian)筑(zhu)工(gong)程。6.0.11民(min)用(yong)建(jian)筑(zhu)工(gong)程驗收(shou)時,應抽檢有代表(biao)性的房間(jian)室(shi)(shi)(shi)內(nei)環(huan)境(jing)污染...
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2010
4-7
恒溫鼓風干燥箱:精密干燥科技的重要設備在(zai)科研、生產及多(duo)個(ge)工業領(ling)域(yu)中,精(jing)確控制溫(wen)(wen)度(du)與(yu)濕(shi)度(du)的(de)干(gan)燥設備(bei)顯得尤為重要。恒(heng)溫(wen)(wen)鼓風干(gan)燥箱作(zuo)為一(yi)(yi)(yi)種(zhong)集高效、穩定、智能于(yu)一(yi)(yi)(yi)體(ti)的(de)實驗室(shi)(shi)和(he)工業設備(bei),憑借其(qi)性能優勢,在(zai)多(duo)個(ge)領(ling)域(yu)內(nei)發揮著不可替代的(de)作(zuo)用。一(yi)(yi)(yi)、工作(zuo)原(yuan)理(li)恒(heng)溫(wen)(wen)鼓風干(gan)燥箱主要由(you)箱體(ti)、加(jia)熱系統(tong)、溫(wen)(wen)控系統(tong)、鼓風系統(tong)及安全(quan)保護裝置等部分組成。其(qi)核心工作(zuo)原(yuan)理(li)是(shi)通(tong)過電(dian)熱元件加(jia)熱空(kong)氣,并利用鼓風機將熱空(kong)氣循環至工作(zuo)室(shi)(shi)內(nei),確保箱...
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2010
4-6
熱空氣老化試驗箱:選擇與使用指南隨(sui)著科(ke)技的發展,熱空(kong)氣老(lao)化(hua)試驗箱在(zai)各種領(ling)域(yu)中得到(dao)了(le)廣泛的應(ying)用。它主(zhu)要用于(yu)模(mo)擬產品(pin)(pin)在(zai)高(gao)溫(wen)環(huan)境下的老(lao)化(hua)過程(cheng),以評估產品(pin)(pin)的耐久性和可靠性。一(yi)、選擇要點溫(wen)度(du)(du)(du)范(fan)(fan)圍(wei):選擇溫(wen)度(du)(du)(du)范(fan)(fan)圍(wei)時應(ying)考慮您的測(ce)試需求。一(yi)般來說,高(gao)溫(wen)老(lao)化(hua)試驗的溫(wen)度(du)(du)(du)范(fan)(fan)圍(wei)在(zai)50℃到(dao)200℃之(zhi)間(jian),而(er)低溫(wen)老(lao)化(hua)試驗的溫(wen)度(du)(du)(du)范(fan)(fan)圍(wei)在(zai)-50℃到(dao)50℃之(zhi)間(jian)。溫(wen)度(du)(du)(du)波(bo)動(dong)度(du)(du)(du):溫(wen)度(du)(du)(du)波(bo)動(dong)度(du)(du)(du)表示(shi)試驗箱內部的溫(wen)度(du)(du)(du)穩(wen)定度(du)(du)(du)。理想(xiang)的溫(wen)度(du)(du)(du)波(bo)動(dong)度(du)(du)(du)應(ying)...
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2010
3-30
電熱式和隔水式培養箱工作原理及注意點(一)電(dian)(dian)(dian)熱式(shi)和隔水式(shi)培(pei)養(yang)箱(xiang)(xiang)(xiang)工作原理(li)電(dian)(dian)(dian)熱式(shi)和隔水式(shi)培(pei)養(yang)箱(xiang)(xiang)(xiang)的(de)外殼通常(chang)用(yong)石棉板或(huo)鐵皮(pi)噴(pen)漆制成,隔水式(shi)培(pei)養(yang)箱(xiang)(xiang)(xiang)內層為紫(zi)銅皮(pi)制的(de)貯水夾層,電(dian)(dian)(dian)熱式(shi)培(pei)養(yang)箱(xiang)(xiang)(xiang)的(de)夾層是用(yong)石棉或(huo)玻璃棉等絕熱材(cai)料制成,以增強保溫(wen)(wen)效果,培(pei)養(yang)箱(xiang)(xiang)(xiang)頂部設有溫(wen)(wen)度計,用(yong)溫(wen)(wen)度控制器自動控制,使箱(xiang)(xiang)(xiang)內溫(wen)(wen)度恒定。隔水式(shi)培(pei)養(yang)箱(xiang)(xiang)(xiang)采用(yong)電(dian)(dian)(dian)熱管加(jia)熱水的(de)方式(shi)加(jia)溫(wen)(wen),電(dian)(dian)(dian)熱式(shi)培(pei)養(yang)箱(xiang)(xiang)(xiang)采用(yong)的(de)是用(yong)電(dian)(dian)(dian)熱絲直接加(jia)熱,利(li)用(yong)空氣對(dui)流,使箱(xiang)(xiang)(xiang)內溫(wen)(wen)度均勻。...
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2010
3-20
真空干燥箱電(dian)熱真空(kong)干燥箱原理(li)與故障傳(chuan)感(gan)(gan)器(qi)可以(yi)布置(zhi)在(zai)真空(kong)室外壁。傳(chuan)感(gan)(gan)器(qi)可以(yi)同時(shi)接受對流、傳(chuan)導、和(he)輻(fu)射(she)熱。而處于真空(kong)室里的(de)玻(bo)(bo)璃棒(bang)溫(wen)度(du)(du)計只能接受輻(fu)射(she)熱,更由于玻(bo)(bo)璃棒(bang)黑度(du)(du)不(bu)可能達到1,相當一(yi)部分輻(fu)射(she)熱被折射(she)了,因此(ci)玻(bo)(bo)璃棒(bang)溫(wen)度(du)(du)計反映的(de)溫(wen)度(du)(du)值就肯定低于儀(yi)表(biao)的(de)溫(wen)度(du)(du)讀(du)數。一(yi)般講,200℃工況(kuang)時(shi)儀(yi)表(biao)的(de)溫(wen)度(du)(du)讀(du)數與玻(bo)(bo)璃棒(bang)溫(wen)度(du)(du)計的(de)讀(du)數兩者相差30℃以(yi)內是正常的(de)。如果控溫(wen)儀(yi)表(biao)的(de)溫(wen)度(du)(du)傳(chuan)感(gan)(gan)器(qi)布置(zhi)在(zai)...
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2010
2-27
培養箱資料電熱(re)恒溫培(pei)養(yang)(yang)箱(xiang)主要特點1、微電腦智能控溫儀,具有設定,測定溫度(du)雙數字顯示和PID自整定功能,控溫,可靠(kao)。2、雙重(zhong)門(men)結構,內(nei)門(men)采用(yong)鋼(gang)化(hua)玻(bo)璃門(men),觀察箱(xiang)內(nei)情況時不影(ying)響恒溫培(pei)養(yang)(yang)箱(xiang)內(nei)溫度(du)。3、不銹鋼(gang)工(gong)作室。恒溫培(pei)養(yang)(yang)箱(xiang)適用(yong)范(fan)圍:恒溫培(pei)養(yang)(yang)箱(xiang)又稱隔水式電熱(re)細胞(bao)(霉菌)培(pei)養(yang)(yang)箱(xiang)供醫療衛(wei)生(sheng)、醫藥工(gong)業(ye)、生(sheng)物(wu)化(hua)學、工(gong)業(ye)生(sheng)產(chan)及農業(ye)科學等科研部門(men)作細菌培(pei)養(yang)(yang)、育種、發(fa)酵(jiao)及其他恒溫試(shi)驗(yan)用(yong)。結...
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2009
12-17
真空干燥箱使用應該注意哪些?1.真(zhen)空(kong)(kong)箱(xiang)外(wai)殼必須(xu)有效接地,以保證使用(yong)安全(quan)。2.真(zhen)空(kong)(kong)箱(xiang)應在(zai)相(xiang)對濕度(du)(du)≤85%RH,周圍(wei)無腐(fu)蝕性(xing)氣(qi)體、無強烈震動源(yuan)及強電磁場(chang)存在(zai)的(de)環境(jing)中使用(yong)。3.真(zhen)空(kong)(kong)箱(xiang)工(gong)作室無防爆、防腐(fu)蝕等處理,不(bu)得放易(yi)然(ran)、易(yi)爆、易(yi)產生腐(fu)蝕性(xing)氣(qi)體的(de)物品(pin)進行干(gan)燥(zao)(zao)。4.真(zhen)空(kong)(kong)泵不(bu)能長時(shi)期工(gong)作,因此當(dang)真(zhen)空(kong)(kong)度(du)(du)達到干(gan)燥(zao)(zao)物品(pin)要求(qiu)時(shi),應先關閉真(zhen)空(kong)(kong)閥(fa),再關閉真(zhen)空(kong)(kong)泵電源(yuan),待真(zhen)空(kong)(kong)度(du)(du)小于(yu)干(gan)燥(zao)(zao)物品(pin)要求(qiu)時(shi),再打開真(zhen)空(kong)(kong)閥(fa)及...
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2009
12-17
真空干燥箱工作原理及詳細使用方法真空(kong)干(gan)(gan)燥(zao)箱專為干(gan)(gan)燥(zao)熱敏性(xing)、易分(fen)解和易氧化(hua)物(wu)質(zhi)而設計,能(neng)夠向內部(bu)充入惰性(xing)氣體,特別是一些成分(fen)復雜的物(wu)品也能(neng)進行快速干(gan)(gan)燥(zao)。該產(chan)品有以下特點:1、長(chang)方體工作室(shi),使有效容積達(da)到zui大(da),微電(dian)腦溫度(du)控制器,控溫可(ke)靠(kao)。2、鋼(gang)化(hua)、防彈雙(shuang)層玻璃門觀察工作室(shi)內物(wu)體,一目了然。3、箱體閉合松緊能(neng)調節(jie),整體成型的硅橡膠門封圈,確保箱內高真空(kong)度(du)。4、工作室(shi)采用(yong)不銹鋼(gang)板(或拉絲板)制...
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2009
12-17
如何保養電熱干燥箱?電(dian)(dian)熱(re)干燥箱供工礦企(qi)業、化驗室、科研單位等干燥、烘焙熔蠟、滅菌(jun)作(zuo)(zuo)用(yong)。微(wei)電(dian)(dian)腦智(zhi)能(neng)化雙(shuang)目控(kong)溫(wen)系(xi)統具有控(kong)溫(wen)保護,準確、可靠。工作(zuo)(zuo)溫(wen)度任意(yi)設定,并具有偏差報警功能(neng),進風口開關(guan)自如,熱(re)風循。保養首冊(ce)一1.使用(yong)前必(bi)須(xu)(xu)注意(yi)所(suo)用(yong)電(dian)(dian)源電(dian)(dian)壓(ya)是否相(xiang)符。使用(yong)時,必(bi)須(xu)(xu)將(jiang)電(dian)(dian)源插(cha)座接(jie)(jie)地線按規(gui)定進行接(jie)(jie)地。2.在通電(dian)(dian)使用(yong)時,切(qie)忌用(yong)手觸及箱左(zuo)側空間的電(dian)(dian)器部(bu)分或用(yong)濕布(bu)揩抹及用(yong)水沖洗,檢修時應將(jiang)電(dian)(dian)源...