两个人免费视频观看高清直播,午夜视频观看,欧美成人三级在线观看播放,国产亚洲欧美久久久久 ,性需求交友网,污污污污污污网站老湿机

英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜

英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜 | 時(shí)間: September-28 15:05:40 | 分類:其它儀器

凌儀生物提供高速離心機(jī),美國(guó)Bio-rad伯樂(lè)電泳,德國(guó)eppendorf艾本德移液器,美國(guó)ABI基因擴(kuò)增儀PCR,雅培原位雜交儀,Thermo熱電離心機(jī)等實(shí)驗(yàn)室儀器設(shè)備,以及Corning康寧,Axygen愛(ài)思進(jìn)Greiner格瑞拉等耗材要省錢,別錯(cuò)過(guò)哦。

英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜 

產(chǎn)品介紹:
Cellulose Membranes纖維素濾膜
Whatman提供以下纖維素膜:純醋酸纖維素膜,純硝酸纖維素膜,醋酸和硝酸混合纖維素酯膜.
Cellulose Acetate Membranes醋酸纖維素膜
Whatman醋酸纖維素膜由純的醋酸纖維素制造而成,這使得這種膜用于生物和臨床分析、無(wú)菌測(cè)試和閃爍測(cè)量非常理想。
醋酸纖維素膜的蛋白吸附力很低。它是親水性膜,適用于水溶液和酒精(介質(zhì))。醋酸纖維素膜已經(jīng)提高了溶劑抗性,尤其是對(duì)低分子量的醇類,同時(shí)加強(qiáng)了熱穩(wěn)定性。由于物理強(qiáng)度高,這種濾膜可以耐180攝氏度高溫,所以適用于熱氣體以及用各種辦法進(jìn)行消毒,而保持膜的完整性。

技術(shù)參數(shù)-醋酸纖維素膜
型號(hào)           厚度            水流速        空氣流速           起泡點(diǎn)
              (μm)        △p=0.9bar       △p=3mbar       (bar)
                      (ml/min/cm²)       (ml/min/cm²)
OE 66         115             20                         -                          3.7
OE 67         115             40                        25                        2.7
ST 68         140             170                       50                        1.5
ST 69         140             300                       90                        0.9
訂貨信息-醋酸纖維素膜
尺寸(mm)       孔徑(μm)         目錄號(hào)          無(wú)菌        數(shù)量/包裝
WCA
25                   0.2                      7001-0004        否              100
25                        0.45                    7000-0002        否              100
47                        0.45                    7000-0004        否              100
OE 66
25                       0.2                       10404106         否              100
47                       0.2                       10404112         否              100
47                       0.2                       10404170         是              100
50                       0.2                       10404114         否              100
110                     0.2                       10404126         否              50
142                     0.2                       10404131         否              25
293                     0.2                       10404139         否              25
300x600             0.2                       10404180         否              5
OE 67
13                      0.45                      10404001         否              100
25                      0.45                      10404006         否              100
47                      0.45                      10404012         否              100
50                      0.45                      10404014         否              100
85                      0.45                      10404044         否              50
100                    0.45                      10404021         否              50
110                    0.45                      10404026         否              50
142                    0.45                      10404031         否              25
OE 67/A
142                    0.45                      10404331         否              25
ST 68
47                      0.8                        10403112         否              100
50                      0.8                        10403114         否              100
ST 69
47                      1.2                        10403012         否              100
50                      1.2                        10403014         否              100

Cellulose Nitrate Membranes硝酸纖維素膜
推薦用于大多數(shù)日常應(yīng)用,是在嚴(yán)格控制室內(nèi)清潔的條件下生產(chǎn)的。一般情況下,無(wú)需要求任何明顯的技術(shù)改變,就可以直接替換掉其他生產(chǎn)廠商的用于一般過(guò)濾目的的濾膜。使用者會(huì)從Whatman現(xiàn)有的濾膜的改進(jìn)中獲得益處。
更高的強(qiáng)度和韌性
大多數(shù)膜本質(zhì)上都很脆弱而且不容易操作;但是很少在裝載到過(guò)濾器或在使用過(guò)程中損壞掉。Whatman硝酸纖維素膜韌性很明顯加強(qiáng)了,能承受住在不破壞膜完整性的條件下操作、裝載和消毒時(shí)的撕裂。經(jīng)破裂測(cè)試已是較強(qiáng)的膜。
英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜
低可提取水平
濾膜中可提取物水平和過(guò)濾或吸附技術(shù)的改進(jìn)一樣變得越來(lái)越重要。尤其是在藥學(xué)、免疫學(xué)、生物學(xué)組織培養(yǎng)和衡量分析應(yīng)用方面,高的提取物水平會(huì)起到負(fù)面影響。Whatman硝酸纖維素膜的提取物水平一般比其它同種型號(hào)的膜低。
孔徑精確
Whatman濾膜一個(gè)主要特征是孔徑精確度很高。膜的孔徑率經(jīng)先進(jìn)的生產(chǎn)和控制系統(tǒng)嚴(yán)格控制。另外,批間差的變化較小,保持一致的實(shí)驗(yàn)結(jié)果。
增加的溫度穩(wěn)定性
濾膜可以在不失完整性的情況下在121攝氏度下進(jìn)行正常消毒。硝酸纖維素膜有圓片、方片和卷狀等規(guī)格。
收縮量減小
過(guò)多的收縮在消毒過(guò)程中會(huì)產(chǎn)生問(wèn)題,也經(jīng)常會(huì)在消毒后再濾器中發(fā)生膜的撕裂,也可能導(dǎo)致流速的降低和整個(gè)過(guò)濾量的減少。Whatman濾膜在消毒過(guò)程中收縮量低。
特征和優(yōu)點(diǎn):
一、孔徑分布精確能改進(jìn)表面俘獲和分析。
二、提取物水平低,保證樣品的完整性。
應(yīng)用
一、樣品分離
二、微生物研究
三、水溶液過(guò)濾
Cellulose Nitrate Filter Types硝酸纖維素膜類型
白色光滑濾膜
這是大多數(shù)實(shí)驗(yàn)室應(yīng)用的標(biāo)準(zhǔn)濾膜,用于1.0μm-5.0μm大小的顆粒和細(xì)胞。過(guò)濾后的殘留物大多數(shù)保留在膜的表面,可以進(jìn)行沉淀物物理性回收和顯微鏡觀察。
用于核算和蛋白分析的硝酸纖維素膜
1975年,E.M.Southern發(fā)明了從瓊脂凝膠轉(zhuǎn)移DNA到一張硝酸纖維素膜的技術(shù)。這個(gè)技術(shù)以它的發(fā)明者命名為Southern Blotting。隨后,蛋白和RNA轉(zhuǎn)移的技術(shù)也發(fā)展起來(lái)了。與層析技術(shù)相關(guān)的是需要相當(dāng)數(shù)量的高質(zhì)量的色譜紙,3MM紙已經(jīng)成為全世界首選的層析紙。

技術(shù)參數(shù)-硝酸纖維素膜
硝酸纖維
厚度                                         125μm
爆裂強(qiáng)度                                 >2 psi
重量                                         3.6-5.5 mg/cm²
較高操作溫度                          80
孔率                                          66-84%
蒸汽高壓滅菌                          yes
親水性                                      yes

 英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜

典型應(yīng)用-硝酸纖維素膜
應(yīng)用領(lǐng)域                     孔徑(μm)           應(yīng)用領(lǐng)域                                孔徑(μm)
普通                                                       沉淀物分析                            0.45
微過(guò)濾                         0.1                    懸浮顆粒                                 5
超凈                             0.1                    空氣污染監(jiān)測(cè)             
滅菌                             0.2                    Asbestos Monitoring(NIOSH)   0.8
去除大多數(shù)微生物     0.45                  食品飲料控制            
分析性沉淀物             0.65                  大腸桿菌                                 0.45(網(wǎng)格)
純化過(guò)濾                     1                       總細(xì)菌計(jì)數(shù)                             0.2
去除顆粒物                 5                       組織培養(yǎng)基              
水中微生物分析                                  去除支原體                             0.1
細(xì)菌計(jì)數(shù)                     0.45(網(wǎng)格)  滅菌過(guò)濾                                 0.2

英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜 

訂貨信息-硝酸纖維素膜
尺寸(mm)            孔徑(μm)           目錄號(hào)                     數(shù)量/包
WCN
13                              0.2                           7182-001                100
13                              0.45                         7184-001                100
25                              0.2                           7182-002                100
25                              0.1                           7181-002                100
25                              0.45                         7184-002                100
25                              0.65                         7186-002                100
25                              0.8                           7188-002                100
25                              1.0                           7190-002                100
25                              3.0                           7193-002                100
25                              5.0                           7195-002                100
37                              0.45                         7184-003                100
37                              0.8                           7188-003                100
47                              0.1                           7181-004                100
47                              0.2                           7182-004                100
47                              0.45                         7141-004                100
47                              0.45                         7141-104                100
47                              0.45                         7141-114                100
47                              0.45                         7141-204                100
47                              0.45                         7141-124                200
47                              0.45                         7141-154                1000
47                              0.45                         7184-004                100
47                              0.65                         7186-004                100
47                              0.8                           7188-004                100
47                              1.0                           7190-004                100
47                              3.0                           7193-004                100
47                              5.0                           7195-004                100
82                              0.45                         7184-008                25
90                              0.2                           7182-009                25
90                              0.45                         7184-009                25
90                              0.8                           7188-009                25
90                              1.0                           7190-009                25
90                              5.0                           7195-009                25
142                            0.2                           7182-014                25
142                            0.45                         7184-014                25
293                            0.45                         7184-029                25

本文標(biāo)題: 英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜 | Tags:Whatman濾膜 英國(guó)Whatman沃特曼Cellulose Membranes纖維素濾膜