凈化工作(zuo)(zuo)臺(tai)是一種(zhong)局(ju)部(bu)層流裝置,能(neng)在局(ju)部(bu)形(xing)成高潔度(du)的(de)(de)工作(zuo)(zuo)環境。它由工作(zuo)(zuo)臺(tai)、過濾(lv)器、風機、靜壓箱和(he)(he)支撐體等組成,采用過濾(lv)空氣(qi)使(shi)工作(zuo)(zuo)臺(tai)操(cao)作(zuo)(zuo)區(qu)(qu)達到凈化除(chu)菌(jun)的(de)(de)目的(de)(de)。室內空氣(qi)經(jing)預過濾(lv)器和(he)(he)高效過濾(lv)除(chu)塵后以(yi)垂直或水平層流狀(zhuang)(zhuang)態(tai)通過工作(zuo)(zuo)臺(tai)的(de)(de)操(cao)作(zuo)(zuo)區(qu)(qu),由于空氣(qi)沒(mei)有渦流,所以(yi),任何一點灰(hui)塵或附著在灰(hui)塵上的(de)(de)雜菌(jun)都能(neng)被排除(chu),不易向別處擴散和(he)(he)轉移。因此(ci),可使(shi)操(cao)作(zuo)(zuo)區(qu)(qu)保持無菌(jun)狀(zhuang)(zhuang)態(tai)。
與沒有細菌室室和疫苗接種箱比效,便用凈化處理本職崗位臺面具備本職崗位水平好、進行操作便于、沒有細菌室郊果耐用、無清潔消毒藥液對身體有害、被占的面積小且可移動式等優缺點。但如果擺在沒有細菌室辦公室便用,沒有細菌室郊果更高。其優缺點是市場價格奢侈,預進行全自動濾水器中和高質量進行全自動濾水器中還必須要 期限沖洗和換洗。 直流電水蒸氣過濾除菌鍋高(gao)(gao)壓(ya)(ya)蒸汽(qi)滅菌(jun)鍋是一個密閉的(de)、可以耐(nai)受一定(ding)壓(ya)(ya)力的(de)雙層金(jin)屬鍋。鍋底或夾層內盛(sheng)水,當水在鍋內沸騰時由于蒸汽(qi)不能逸出(chu),使鍋內壓(ya)(ya)力逐漸升(sheng)高(gao)(gao),水的(de)沸點和溫(wen)度可隨之升(sheng)高(gao)(gao),從而達到(dao)高(gao)(gao)溫(wen)滅菌(jun)的(de)目(mu)的(de)。一般在0.11MPa的(de)壓(ya)(ya)力下,121℃滅菌(jun)20~30min,包括芽孢在內的(de)所有微生物均可被殺死。如果滅菌(jun)物品體積較大(da),蒸汽(qi)穿透困難,可以適當提高(gao)(gao)蒸汽(qi)壓(ya)(ya)力或延長滅菌(jun)時間。
髙壓變壓器殺菌鍋有水平、立試、臺式式等很多品種型,在微海洋生物學研究室,尤為較常用的是臺式式和立試髙壓變壓器飽和蒸汽殺菌鍋。和自然壓殺菌鍋相對比,髙壓變壓器殺菌鍋的優缺是殺菌所必需的時間短、厲行節約清潔燃料、殺菌切底等。其壞處是價格多少高,殺菌數量較小。 培養箱培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱是培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)微(wei)(wei)生(sheng)物的(de)(de)(de)(de)(de)專用(yong)(yong)(yong)設(she)備。制熱式培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱是由電爐絲和溫(wen)(wen)(wen)度控制儀合成的(de)(de)(de)(de)(de)固(gu)定體積的(de)(de)(de)(de)(de)恒(heng)溫(wen)(wen)(wen)培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)裝置,大小規格(ge)不(bu)一。微(wei)(wei)生(sheng)物實驗室常用(yong)(yong)(yong)的(de)(de)(de)(de)(de)培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱工作(zuo)容積有(you)(you)450×450×350mm3或(huo)650×500×500mm3,適用(yong)(yong)(yong)于室溫(wen)(wen)(wen)至60℃之間的(de)(de)(de)(de)(de)各(ge)類微(wei)(wei)生(sheng)物培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)。目前(qian),隨著科學水平的(de)(de)(de)(de)(de)發展,培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱設(she)備的(de)(de)(de)(de)(de)完善程度和價格(ge)有(you)(you)很大差(cha)別(bie)。有(you)(you)各(ge)種(zhong)結構合理、功能(neng)齊全的(de)(de)(de)(de)(de)培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱,如恒(heng)溫(wen)(wen)(wen)培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱、恒(heng)溫(wen)(wen)(wen)恒(heng)濕培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱、低溫(wen)(wen)(wen)培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱、微(wei)(wei)生(sheng)物多用(yong)(yong)(yong)培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱和二(er)氧化碳培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)箱等。有(you)(you)的(de)(de)(de)(de)(de)用(yong)(yong)(yong)計算機(ji)控制,可選擇多條時間線變換溫(wen)(wen)(wen)差(cha),從而克(ke)服(fu)了(le)環(huan)境溫(wen)(wen)(wen)度的(de)(de)(de)(de)(de)影響,一年四季(ji)均能(neng)達到培(pei)(pei)(pei)養(yang)(yang)(yang)(yang)要求(qiu)的(de)(de)(de)(de)(de)溫(wen)(wen)(wen)度。
微生(sheng)物(wu)多用培養(yang)箱(xiang)是(shi)集加熱、制冷和振蕩于一體(ti)的微生(sheng)物(wu)液體(ti)發(fa)酵裝置。工(gong)作室的溫(wen)度在(zai)15~50℃范(fan)圍內任意(yi)選(xuan)定(ding),選(xuan)定(ding)后經溫(wen)控儀自動控制,保持工(gong)作室內恒溫(wen)。同(tong)時(shi)設有可(ke)控硅調速(su)系統(tong),振蕩機轉速(su)可(ke)在(zai)1~220rpm范(fan)圍內任意(yi)調控。
非常真空干燥箱干(gan)(gan)燥(zao)(zao)箱(xiang)(xiang)是用于(yu)除(chu)去潮濕物(wu)料內(nei)及(ji)器皿內(nei)外水分或(huo)其它揮發性溶液(ye)的(de)設(she)備。類型很多(duo),有(you)箱(xiang)(xiang)式(shi)(shi)、滾筒式(shi)(shi)、套間式(shi)(shi)、回(hui)轉(zhuan)式(shi)(shi)等。微生物(wu)學實驗室多(duo)用箱(xiang)(xiang)式(shi)(shi)干(gan)(gan)燥(zao)(zao)箱(xiang)(xiang),大小規格不一(yi)。工作室內(nei)配(pei)有(you)可活動的(de)鐵絲網板(ban),便于(yu)放置被干(gan)(gan)燥(zao)(zao)的(de)物(wu)品。制熱(re)升溫式(shi)(shi)干(gan)(gan)燥(zao)(zao)箱(xiang)(xiang)也(ye)是有(you)電爐絲和(he)溫度控(kong)(kong)制儀組成(cheng),可調節溫度從(cong)室溫至300℃任意選擇。有(you)的(de)干(gan)(gan)燥(zao)(zao)箱(xiang)(xiang)采用導電溫度計為敏感元件,配(pei)合晶體管(guan)和(he)繼(ji)電器組成(cheng)自動控(kong)(kong)制系統,克服(fu)了金屬管(guan)型熱(re)膨(peng)脹控(kong)(kong)制的(de)缺點。此外,還有(you)真(zhen)空干(gan)(gan)燥(zao)(zao)箱(xiang)(xiang)(配(pei)有(you)真(zhen)空泵和(he)氣壓表),可在常壓或(huo)減壓下操作。
搖床
搖(yao)(yao)床又稱搖(yao)(yao)瓶(ping)機(ji),它(ta)是培養好氣性微(wei)生物的小(xiao)型試驗設備或(huo)作為(wei)種子擴大培養之用,常用的搖(yao)(yao)床有往(wang)復(fu)式和旋(xuan)轉(zhuan)式兩種。往(wang)復(fu)式搖(yao)(yao)床的往(wang)復(fu)頻率一般(ban)(ban)在(zai)80~140次(ci)/min,沖程一般(ban)(ban)為(wei)5~14cm,如頻率過快、沖程過大或(huo)瓶(ping)內(nei)液體(ti)裝量過多,在(zai)搖(yao)(yao)動時液體(ti)會(hui)濺到包(bao)扎瓶(ping)口(kou)的紗布或(huo)棉塞上,導致(zhi)雜菌污染(ran),特別是啟動時更容易發生這種情(qing)況(kuang)。旋(xuan)轉(zhuan)式搖(yao)(yao)床的偏(pian)心距一般(ban)(ban)在(zai)3~6cm之間,旋(xuan)轉(zhuan)次(ci)數為(wei)60~300rpm。
放(fang)在搖床(chuang)上的(de)培(pei)養(yang)瓶(ping)(一般為三角(jiao)(jiao)瓶(ping))中的(de)發酵(jiao)液(ye)所(suo)需要的(de)氧是由空氣經瓶(ping)口(kou)包扎的(de)紗布(一般8層)或棉塞通入的(de),所(suo)以氧的(de)傳遞與(yu)瓶(ping)口(kou)的(de)大小、瓶(ping)口(kou)的(de)幾何形狀、棉塞或紗布的(de)厚度(du)和(he)密(mi)度(du)有關。在通常情(qing)況下,搖瓶(ping)的(de)氧吸(xi)收(shou)系數取決于搖床(chuang)的(de)特性和(he)三角(jiao)(jiao)瓶(ping)的(de)裝樣量。
反復動作式搖床是用曲柄道理帶動力搖床作反復動作動作,手機為鋼制或實木的長方框子,下有層至有三層包裝箱,包裝箱上長圓形備放塑造養育瓶,孔中凸起其中一個三邊形形橡膠,用于統一塑造養育瓶并減小瓶的抖動,傳輸裝置普通按照兩級腰帶輪降速,置換調壓腰帶輪可轉變反復動作平率。扁心輪輪上會開有差異的扁心輪孔,要怎樣的調節扁心輪距。反復動作式搖床的平率和扁心輪距的深淺對氧的吸引有嚴重的關系。 電動機式搖床是用電動機的彎矩輪軸使木棧板的搖擺,木棧板的全是層或一二層,用于不銹鋼裝飾管嗎板材料、鋁合金板或鐵質板生產加工。在4個彎矩輪軸上用有聯接可調節為節左右兩,使木棧板的恢復橫向。這一搖床結構的冗雜,造貴點。其好處是氧的轉遞非常好、電功率消耗量小、教育細胞培養液不用濺到瓶口的毛巾上。 體視顯微鏡 生物體體員工肺部結節影,須要也是借助光學高倍顯微鏡才可探究知曉鳥卵的員工價值形式和神經細胞框架。所以說,在生物體體學的基本鉆研中,光學高倍顯微鏡就被選為無可替代的軟件工具。顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)的(de)(de)種類很多(duo),根(gen)據其結構(gou),可(ke)以(yi)分(fen)為光(guang)(guang)學顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)和(he)非光(guang)(guang)學顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)兩(liang)大(da)(da)類。光(guang)(guang)學顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)又可(ke)分(fen)為單(dan)式顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)和(he)復(fu)式顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)。最簡單(dan)的(de)(de)單(dan)式顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)即放(fang)(fang)大(da)(da)鏡(jing)(jing)(jing)(放(fang)(fang)大(da)(da)倍(bei)數(shu)常(chang)在10倍(bei)左(zuo)右(you)),構(gou)造復(fu)雜的(de)(de)單(dan)式顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)為解剖顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(放(fang)(fang)大(da)(da)倍(bei)數(shu)在200左(zuo)右(you))。在微(wei)(wei)(wei)(wei)生物(wu)學的(de)(de)研(yan)究中,主要(yao)是(shi)復(fu)式顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)。其中以(yi)普通光(guang)(guang)學顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)(明視野(ye)顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing))最為常(chang)用(yong)。此(ci)外,還有(you)暗(an)視野(ye)顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)、相差顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)、熒光(guang)(guang)顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)、偏光(guang)(guang)顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)、紫外光(guang)(guang)顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)和(he)倒(dao)置顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)等。非光(guang)(guang)學顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)為電子顯(xian)(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)鏡(jing)(jing)(jing)。
預防接種箱接種(zhong)(zhong)(zhong)(zhong)箱(xiang)(xiang)(xiang)分為(wei)固體(ti)(ti)菌(jun)種(zhong)(zhong)(zhong)(zhong)接種(zhong)(zhong)(zhong)(zhong)箱(xiang)(xiang)(xiang)和(he)(he)液體(ti)(ti)菌(jun)種(zhong)(zhong)(zhong)(zhong)接種(zhong)(zhong)(zhong)(zhong)箱(xiang)(xiang)(xiang)兩(liang)(liang)(liang)種(zhong)(zhong)(zhong)(zhong)。固體(ti)(ti)菌(jun)種(zhong)(zhong)(zhong)(zhong)接種(zhong)(zhong)(zhong)(zhong)箱(xiang)(xiang)(xiang)是一個用木料和(he)(he)玻璃制成(cheng)或(huo)(huo)由有(you)(you)機玻璃焊接而成(cheng)的(de)密(mi)(mi)閉小(xiao)箱(xiang)(xiang)(xiang)。又分為(wei)雙(shuang)(shuang)人和(he)(he)單人操(cao)作(zuo)(zuo)箱(xiang)(xiang)(xiang)。箱(xiang)(xiang)(xiang)體(ti)(ti)可大可小(xiao),一般箱(xiang)(xiang)(xiang)體(ti)(ti)長約143cm,寬86cm,總高154cm,支架76cm。箱(xiang)(xiang)(xiang)的(de)上部(bu)左右兩(liang)(liang)(liang)側(ce)各裝(zhuang)(zhuang)有(you)(you)兩(liang)(liang)(liang)扇能啟閉的(de)玻璃推拉門,方便菌(jun)種(zhong)(zhong)(zhong)(zhong)進出。窗的(de)下部(bu)分別設有(you)(you)兩(liang)(liang)(liang)個直徑約13cm的(de)圓洞,兩(liang)(liang)(liang)洞的(de)中心距離(li)為(wei)52cm(同(tong)肩寬),洞口裝(zhuang)(zhuang)有(you)(you)帶松緊帶的(de)袖套,以防(fang)雙(shuang)(shuang)手(shou)(shou)在箱(xiang)(xiang)(xiang)內操(cao)作(zuo)(zuo)時(shi),外(wai)界空氣進入箱(xiang)(xiang)(xiang)內造(zao)成(cheng)污染。操(cao)作(zuo)(zuo)時(shi)兩(liang)(liang)(liang)人相對而坐,雙(shuang)(shuang)手(shou)(shou)通過袖套伸入箱(xiang)(xiang)(xiang)內。箱(xiang)(xiang)(xiang)兩(liang)(liang)(liang)側(ce)最好也裝(zhuang)(zhuang)上玻璃,箱(xiang)(xiang)(xiang)頂(ding)(ding)部(bu)為(wei)木板(ban)或(huo)(huo)玻璃。箱(xiang)(xiang)(xiang)內頂(ding)(ding)部(bu)裝(zhuang)(zhuang)有(you)(you)紫(zi)外(wai)線殺(sha)菌(jun)燈(deng)和(he)(he)照明用日(ri)光燈(deng)各一支。箱(xiang)(xiang)(xiang)體(ti)(ti)安裝(zhuang)(zhuang)木板(ban)或(huo)(huo)玻璃均可,但要注意(yi)密(mi)(mi)封(feng)。
液體菌(jun)(jun)種(zhong)接(jie)種(zhong)箱(xiang)是專為移接(jie)液體菌(jun)(jun)種(zhong)而設計的(de)。比固體菌(jun)(jun)種(zhong)箱(xiang)窄長(chang),單側兩人操作。內設軌道和(he)紫外線燈,箱(xiang)兩端開有高25cm,寬10cm的(de)長(chang)方(fang)形出(chu)口,方(fang)便(bian)菌(jun)(jun)種(zhong)進(jin)出(chu),洞口設有小(xiao)推門。進(jin)出(chu)口下處設蒸汽源,接(jie)種(zhong)時(shi)用蒸汽封住進(jin)出(chu)口,以(yi)防雜菌(jun)(jun)進(jin)入(ru)箱(xiang)內。箱(xiang)背面設有液體菌(jun)(jun)種(zhong)移接(jie)管能進(jin)入(ru)的(de)小(xiao)孔。
接種(zhong)箱滅(mie)(mie)菌時(shi)(shi)(shi),用(yong)紫(zi)外(wai)線(xian)照射30min。如果沒有(you)紫(zi)外(wai)線(xian)燈,可用(yong)甲醛和(he)高錳(meng)酸鉀(jia)(甲醛10~14mL/m3+高錳(meng)酸鉀(jia)5~7g/m3空間)熏蒸30min以上(shang)。使用(yong)時(shi)(shi)(shi),先(xian)將所需物品和(he)工具放入接種(zhong)箱內,然后進行(xing)藥(yao)劑熏蒸和(he)紫(zi)外(wai)線(xian)滅(mie)(mie)菌,再(zai)按無菌操作(zuo)進行(xing)接種(zhong)。接種(zhong)箱的結構簡單,造價低廉,易消毒滅(mie)(mie)菌,操作(zuo)方便,而且人在箱外(wai)操作(zuo),氣(qi)溫較高時(shi)(shi)(shi)也能作(zuo)業(ye)。缺點(dian)是進出培養(yang)基(ji)費(fei)工費(fei)時(shi)(shi)(shi),每次接種(zhong)前都需要進行(xing)滅(mie)(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。

