凈化(hua)(hua)工作臺(tai)是(shi)一種局(ju)部層(ceng)流(liu)(liu)裝置(zhi),能在局(ju)部形成高(gao)潔度的(de)工作環境。它由工作臺(tai)、過(guo)(guo)濾(lv)器、風機(ji)、靜壓箱和支撐體等組成,采用過(guo)(guo)濾(lv)空(kong)(kong)氣使工作臺(tai)操作區達到凈化(hua)(hua)除菌的(de)目的(de)。室內空(kong)(kong)氣經預過(guo)(guo)濾(lv)器和高(gao)效過(guo)(guo)濾(lv)除塵后以(yi)垂直或(huo)水平層(ceng)流(liu)(liu)狀(zhuang)態通(tong)過(guo)(guo)工作臺(tai)的(de)操作區,由于空(kong)(kong)氣沒(mei)有(you)渦流(liu)(liu),所以(yi),任(ren)何一點灰(hui)塵或(huo)附(fu)著在灰(hui)塵上的(de)雜菌都能被排除,不易(yi)向別處擴散和轉移。因此,可使操作區保(bao)持無菌狀(zhuang)態。
與沒有細菌室室和疫苗接種箱相比,動用廢氣處理業務中臺具備業務中標準好、操控便捷、沒有細菌室成效能信、無消毒劑除甲醛藥劑對人的身體有害、擠占范圍小且可活動等益處。這樣放著沒有細菌室辦公室動用,沒有細菌室成效更穩。其弱項是價格多少超貴,預油煙凈化器器和有效率油煙凈化器器還需用要定期清理和修改。 低壓水汽消毒鍋高壓蒸汽(qi)滅(mie)菌鍋是一個密閉(bi)的(de)(de)、可(ke)以(yi)(yi)耐受一定壓力(li)的(de)(de)雙層(ceng)金屬鍋。鍋底或(huo)夾(jia)層(ceng)內(nei)盛水(shui),當(dang)水(shui)在鍋內(nei)沸騰時由于蒸汽(qi)不(bu)能(neng)逸出,使鍋內(nei)壓力(li)逐漸升高,水(shui)的(de)(de)沸點和(he)溫度可(ke)隨之升高,從而達到高溫滅(mie)菌的(de)(de)目的(de)(de)。一般(ban)在0.11MPa的(de)(de)壓力(li)下,121℃滅(mie)菌20~30min,包括芽(ya)孢在內(nei)的(de)(de)所有微生(sheng)物均可(ke)被殺死。如果滅(mie)菌物品(pin)體積較大,蒸汽(qi)穿透困難,可(ke)以(yi)(yi)適(shi)當(dang)提高蒸汽(qi)壓力(li)或(huo)延(yan)長滅(mie)菌時間(jian)。
直流電過濾除菌鍋有臥式、臥式、手堤式等各種各樣的類型,在微生態學學科學試驗室,為通用的是手堤式和臥式直流電過熱蒸汽過濾除菌鍋。和臥式儲罐過濾除菌鍋相對,直流電過濾除菌鍋的缺陷是過濾除菌需要的的時短、節約資源主要燃料、過濾除菌完全等。其缺陷是市場價珍貴,過濾除菌存儲空間較小。 訓練箱培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)是培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)微生(sheng)物(wu)的(de)(de)專(zhuan)用(yong)設(she)備(bei)。制熱式培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)是由電爐絲和溫(wen)(wen)(wen)度(du)控制儀合(he)成的(de)(de)固定體(ti)積(ji)的(de)(de)恒(heng)溫(wen)(wen)(wen)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)裝(zhuang)置,大小規(gui)格不一。微生(sheng)物(wu)實驗室常(chang)用(yong)的(de)(de)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)工作容積(ji)有(you)(you)(you)450×450×350mm3或650×500×500mm3,適(shi)用(yong)于(yu)室溫(wen)(wen)(wen)至60℃之間(jian)的(de)(de)各(ge)類微生(sheng)物(wu)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)。目前,隨著科(ke)學水平(ping)的(de)(de)發展,培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)設(she)備(bei)的(de)(de)完善程(cheng)度(du)和價格有(you)(you)(you)很(hen)大差別(bie)。有(you)(you)(you)各(ge)種結構合(he)理、功能齊全的(de)(de)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang),如(ru)恒(heng)溫(wen)(wen)(wen)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)、恒(heng)溫(wen)(wen)(wen)恒(heng)濕培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)、低溫(wen)(wen)(wen)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)、微生(sheng)物(wu)多(duo)用(yong)培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)和二(er)氧化碳培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱(xiang)(xiang)等。有(you)(you)(you)的(de)(de)用(yong)計算機控制,可選(xuan)擇多(duo)條時間(jian)線變換溫(wen)(wen)(wen)差,從而(er)克服了環境溫(wen)(wen)(wen)度(du)的(de)(de)影響,一年(nian)四季均能達到培(pei)(pei)(pei)(pei)養(yang)(yang)(yang)(yang)要求的(de)(de)溫(wen)(wen)(wen)度(du)。
微生物多用培養箱是集(ji)加熱、制(zhi)(zhi)冷和振(zhen)蕩于一體的微生物液體發(fa)酵裝置(zhi)。工作室的溫(wen)度在15~50℃范圍(wei)(wei)內任(ren)意選定,選定后經溫(wen)控(kong)(kong)儀自動控(kong)(kong)制(zhi)(zhi),保持工作室內恒溫(wen)。同(tong)時設(she)有(you)可(ke)控(kong)(kong)硅調速(su)系統(tong),振(zhen)蕩機轉(zhuan)速(su)可(ke)在1~220rpm范圍(wei)(wei)內任(ren)意調控(kong)(kong)。
干燥的箱干(gan)燥箱(xiang)是用于(yu)(yu)除去潮濕(shi)物料(liao)內(nei)及器皿內(nei)外水分或其它(ta)揮發(fa)性溶液的(de)(de)設備。類型(xing)很多,有箱(xiang)式(shi)、滾(gun)筒(tong)式(shi)、套間式(shi)、回轉式(shi)等(deng)。微生物學實驗室(shi)(shi)多用箱(xiang)式(shi)干(gan)燥箱(xiang),大(da)小規格不一。工作室(shi)(shi)內(nei)配有可活動(dong)的(de)(de)鐵絲網板,便(bian)于(yu)(yu)放(fang)置被(bei)干(gan)燥的(de)(de)物品。制(zhi)熱升溫式(shi)干(gan)燥箱(xiang)也(ye)是有電(dian)爐(lu)絲和溫度(du)控制(zhi)儀組(zu)(zu)成,可調節溫度(du)從室(shi)(shi)溫至300℃任意選擇。有的(de)(de)干(gan)燥箱(xiang)采用導電(dian)溫度(du)計(ji)為(wei)敏感元件,配合晶體管(guan)和繼電(dian)器組(zu)(zu)成自動(dong)控制(zhi)系統,克服了金屬管(guan)型(xing)熱膨脹控制(zhi)的(de)(de)缺(que)點。此外,還有真空干(gan)燥箱(xiang)(配有真空泵和氣壓表(biao)),可在常壓或減壓下操作。
搖床
搖床(chuang)又稱搖瓶機(ji),它是培(pei)養好氣性微生物的小型(xing)試驗設(she)備或作為(wei)種子擴大(da)培(pei)養之用(yong),常用(yong)的搖床(chuang)有往復(fu)式(shi)(shi)和旋(xuan)轉(zhuan)式(shi)(shi)兩種。往復(fu)式(shi)(shi)搖床(chuang)的往復(fu)頻率(lv)一(yi)般(ban)在80~140次/min,沖(chong)程(cheng)(cheng)一(yi)般(ban)為(wei)5~14cm,如頻率(lv)過快、沖(chong)程(cheng)(cheng)過大(da)或瓶內液體裝量過多(duo),在搖動時液體會濺到(dao)包扎瓶口(kou)的紗布或棉塞上,導致雜菌污(wu)染(ran),特別(bie)是啟(qi)動時更容易發生這種情況。旋(xuan)轉(zhuan)式(shi)(shi)搖床(chuang)的偏(pian)心距一(yi)般(ban)在3~6cm之間,旋(xuan)轉(zhuan)次數為(wei)60~300rpm。
放在(zai)搖(yao)(yao)床上(shang)的(de)(de)(de)培養瓶(ping)(ping)(一般為三(san)角瓶(ping)(ping))中的(de)(de)(de)發(fa)酵(jiao)液所需要的(de)(de)(de)氧是由空氣經瓶(ping)(ping)口(kou)包扎的(de)(de)(de)紗布(一般8層)或(huo)棉塞通入(ru)的(de)(de)(de),所以氧的(de)(de)(de)傳遞與瓶(ping)(ping)口(kou)的(de)(de)(de)大小、瓶(ping)(ping)口(kou)的(de)(de)(de)幾何形狀、棉塞或(huo)紗布的(de)(de)(de)厚度(du)和密度(du)有關。在(zai)通常情況下,搖(yao)(yao)瓶(ping)(ping)的(de)(de)(de)氧吸(xi)收系數取決于(yu)搖(yao)(yao)床的(de)(de)(de)特(te)性和三(san)角瓶(ping)(ping)的(de)(de)(de)裝(zhuang)樣量。
回轉式式搖床是采取曲柄關鍵技術帶領搖床作回轉式跑步,外觀為鋼制或鐵質的長方框子,一 層至二三層木質托盤的,木質托盤的上的小圓孔備放激發瓶,孔中凸出來同一個四角形可塑橡皮,用在特定激發瓶并變少瓶的振動幅度大,傳輸組織基本上進行特殊皮帶款的款的輪減慢速度,變換可以調節皮帶款的款的輪可變更回轉式頻繁 。彎矩輪上都有不相同的彎矩孔,要怎樣可以調節彎矩距。回轉式式搖床的頻繁 和彎矩距的規格對氧的吸收率有很深的影響力。 縮放式搖床是利于縮放的剪力軸使拖盤扭動,拖盤全是層或有兩層,可以用在不銹不透鋼板、鋁合金板或實木板打造。在這三個剪力軸里裝有螺栓標準能調節上下左右,使拖盤穩定標準。這些搖床框架有難度,造價格高。其優勢:是氧的獲取很好、電率浪費小、陪養基都不會濺到瓶口的醫用紗布上。 體視顯微鏡 微菌物個體工商戶戶很小,有必要有效利用高倍電子顯微鏡方能分析清它的個體工商戶戶特性和生殖細胞設計。往往,在微菌物學的幾項實驗中,高倍電子顯微鏡就成不能夠缺失的方式。顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)的(de)種(zhong)類(lei)很多,根據其(qi)結構,可(ke)以分為光(guang)(guang)學(xue)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)和非(fei)光(guang)(guang)學(xue)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)兩大(da)類(lei)。光(guang)(guang)學(xue)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)又可(ke)分為單(dan)式顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)和復式顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)。最(zui)簡單(dan)的(de)單(dan)式顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)即(ji)放(fang)大(da)鏡(jing)(jing)(jing)(jing)(放(fang)大(da)倍數(shu)常在10倍左右(you)(you)),構造復雜的(de)單(dan)式顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)為解(jie)剖顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)(放(fang)大(da)倍數(shu)在200左右(you)(you))。在微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)生物學(xue)的(de)研究中,主(zhu)要是復式顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)。其(qi)中以普(pu)通光(guang)(guang)學(xue)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)(明視野顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing))最(zui)為常用。此外(wai),還有(you)暗(an)視野顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)、相差(cha)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)、熒光(guang)(guang)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)、偏光(guang)(guang)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)、紫外(wai)光(guang)(guang)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)和倒(dao)置(zhi)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)等。非(fei)光(guang)(guang)學(xue)顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)為電子顯(xian)(xian)(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(jing)。
注射箱接(jie)種(zhong)(zhong)箱(xiang)(xiang)(xiang)(xiang)分為(wei)固(gu)體菌種(zhong)(zhong)接(jie)種(zhong)(zhong)箱(xiang)(xiang)(xiang)(xiang)和液體菌種(zhong)(zhong)接(jie)種(zhong)(zhong)箱(xiang)(xiang)(xiang)(xiang)兩(liang)種(zhong)(zhong)。固(gu)體菌種(zhong)(zhong)接(jie)種(zhong)(zhong)箱(xiang)(xiang)(xiang)(xiang)是一(yi)個用木料(liao)和玻(bo)璃(li)(li)制成或由有(you)機玻(bo)璃(li)(li)焊(han)接(jie)而成的(de)密閉小(xiao)箱(xiang)(xiang)(xiang)(xiang)。又(you)分為(wei)雙人(ren)和單人(ren)操作(zuo)箱(xiang)(xiang)(xiang)(xiang)。箱(xiang)(xiang)(xiang)(xiang)體可大可小(xiao),一(yi)般箱(xiang)(xiang)(xiang)(xiang)體長約(yue)143cm,寬86cm,總高(gao)154cm,支架76cm。箱(xiang)(xiang)(xiang)(xiang)的(de)上(shang)部(bu)左右兩(liang)側(ce)各(ge)裝(zhuang)(zhuang)有(you)兩(liang)扇能啟閉的(de)玻(bo)璃(li)(li)推拉門(men),方便菌種(zhong)(zhong)進出。窗(chuang)的(de)下部(bu)分別設(she)有(you)兩(liang)個直(zhi)徑約(yue)13cm的(de)圓洞(dong),兩(liang)洞(dong)的(de)中心距離為(wei)52cm(同(tong)肩寬),洞(dong)口裝(zhuang)(zhuang)有(you)帶(dai)松緊帶(dai)的(de)袖(xiu)套,以防(fang)雙手在(zai)箱(xiang)(xiang)(xiang)(xiang)內(nei)操作(zuo)時(shi)(shi),外界空氣(qi)進入箱(xiang)(xiang)(xiang)(xiang)內(nei)造成污(wu)染。操作(zuo)時(shi)(shi)兩(liang)人(ren)相對而坐(zuo),雙手通過袖(xiu)套伸入箱(xiang)(xiang)(xiang)(xiang)內(nei)。箱(xiang)(xiang)(xiang)(xiang)兩(liang)側(ce)最(zui)好也(ye)裝(zhuang)(zhuang)上(shang)玻(bo)璃(li)(li),箱(xiang)(xiang)(xiang)(xiang)頂部(bu)為(wei)木板或玻(bo)璃(li)(li)。箱(xiang)(xiang)(xiang)(xiang)內(nei)頂部(bu)裝(zhuang)(zhuang)有(you)紫外線殺菌燈和照明用日光燈各(ge)一(yi)支。箱(xiang)(xiang)(xiang)(xiang)體安裝(zhuang)(zhuang)木板或玻(bo)璃(li)(li)均可,但要注意密封。
液體菌(jun)種(zhong)接(jie)種(zhong)箱(xiang)是專為移接(jie)液體菌(jun)種(zhong)而設(she)計的。比固體菌(jun)種(zhong)箱(xiang)窄長,單側兩人(ren)操作。內設(she)軌道(dao)和紫外線燈(deng),箱(xiang)兩端開有(you)高25cm,寬10cm的長方(fang)形(xing)出(chu)(chu)口(kou),方(fang)便(bian)菌(jun)種(zhong)進(jin)出(chu)(chu),洞口(kou)設(she)有(you)小(xiao)推門。進(jin)出(chu)(chu)口(kou)下處設(she)蒸汽(qi)源,接(jie)種(zhong)時用蒸汽(qi)封住(zhu)進(jin)出(chu)(chu)口(kou),以防雜菌(jun)進(jin)入箱(xiang)內。箱(xiang)背面設(she)有(you)液體菌(jun)種(zhong)移接(jie)管能進(jin)入的小(xiao)孔。
接種(zhong)箱滅(mie)菌時(shi),用紫(zi)外(wai)線照射30min。如(ru)果沒(mei)有(you)紫(zi)外(wai)線燈,可(ke)用甲(jia)醛和高錳(meng)酸鉀(甲(jia)醛10~14mL/m3+高錳(meng)酸鉀5~7g/m3空間)熏蒸30min以上。使用時(shi),先將(jiang)所需物品和工具放入(ru)接種(zhong)箱內,然后(hou)進(jin)行藥劑熏蒸和紫(zi)外(wai)線滅(mie)菌,再按(an)無菌操作進(jin)行接種(zhong)。接種(zhong)箱的(de)結構簡單(dan),造價低廉,易消(xiao)毒滅(mie)菌,操作方便,而(er)且人在(zai)箱外(wai)操作,氣溫較高時(shi)也能(neng)作業。缺點是進(jin)出(chu)培養基費工費時(shi),每(mei)次接種(zhong)前都需要進(jin)行滅(mie)菌。
冰箱冷藏 微生物實驗室的冰箱主要有兩種:普通冰箱和低溫冷凍冰箱。普通冰箱一般都具有兩個柜子,即鮮藏柜和冷藏柜,溫度分別為4℃和-20℃;低溫冷凍冰箱溫度一般控制在-40~-80℃。它們都可以用于微生物菌種保藏。鮮藏柜常用于保存斜面菌種,保藏時間在3個月左右。超過3個月,斜面就會變干,因此需要轉接菌種。如果要長時間保存菌種,則需要經過處理后,貯藏于普通冰箱的冷藏柜或低溫冷凍冰箱中,它們的保藏時間較長,一般都在1年以上。

