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id="x774lnu" class="leftbox clearfix"><h1>北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià) 蘇州英賽斯智能科技供應(yīng)</h1><div id="eaw3he7" class="proBig"><div id="gpczls9" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171347973309/6371381713479733098214210.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="xl2tjau" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171347973309/6371381713479733098214210.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="rurtahb" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>江蘇省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià),蛋白純化系統(tǒng)</p><p><span>***更新：</span>2020-08-10 22:04:28</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="ktahjln" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">蘇州英賽斯智能科技有限公司</a></p><p><span>聯(lián)系人：</span>李大為</p><p><span>郵箱: </span>570745634@qq.com</p><p><span>電話: </span>18606243033</p><p><span>傳真: </span>0512_63937379</p><p><span>網(wǎng)址: </span>http://www.inscinstech.com.cn</p><p><span>手機(jī): </span>0512-63937378</p><p><span>地址: </span>吳江經(jīng)濟(jì)技術(shù)開(kāi)發(fā)區(qū)聯(lián)楊路南側(cè)、龍橋路西側(cè)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="hgyqnzg" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="wvxeryv" class="box"><p><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二） 2.4.2 纖維素柱層析法該法是利用蛋白質(zhì)的酸堿性質(zhì)作為分離的基礎(chǔ)。離子交換纖維素（cellulose ion-exchanger）是人工合成的纖維素衍生物，它具有松散的親水性網(wǎng)狀結(jié)構(gòu)，有較大的表面積，使蛋白質(zhì)大分子可以自由通過(guò)。因此常用于蛋白質(zhì)的分離。（1）羧甲基纖維素（CM-纖維素）在纖維素顆粒上帶有羧甲基基團(tuán)。在中性pH條件下，羧甲基上的質(zhì)子可解離下來(lái)（圖2-27a），而溶液中帶正電荷的蛋白質(zhì)分子可與纖維素顆粒上的羧甲基負(fù)電荷結(jié)合?？山粨Q的基團(tuán)帶正電，因此是一種陽(yáng)離子交換劑。蛋白質(zhì)與離子交換纖維素之間結(jié)合能力的大小取決于彼此間相反電荷基團(tuán)之間靜電吸引。 (2）二乙氨基乙基纖維素（DEAE-纖維素）在中性pH條件下，北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià)，它含有帶正電荷的基團(tuán)，可與溶液中的帶負(fù)電荷的蛋白質(zhì)結(jié)合，可交換的基團(tuán)帶負(fù)電荷，因此是一種陰離子交換劑。當(dāng)某一蛋白質(zhì)混合溶液通過(guò)裝有DEAE-纖維素的層析柱時(shí)，帶正電荷的蛋白質(zhì)不能結(jié)合而隨著洗脫液的流動(dòng)先被洗脫下來(lái)，北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià)。帶負(fù)電荷的蛋白質(zhì)將被結(jié)合到柱上。結(jié)合力取決于彼此相反電荷基團(tuán)間的靜電吸引。然后選用一定pH和離子強(qiáng)度的緩沖液進(jìn)行洗脫，北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià)，改變蛋白質(zhì)分子所帶的靜電荷，依次從層析柱流出達(dá)到相互分離的目的。北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià),蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171347973309/6371381713479733098214210.jpg"></div><p style="text-indent:25px">蛋白質(zhì)分離純化步驟（二） 2.4 樣品的進(jìn)一步分離純化用等電點(diǎn)沉淀法、鹽析法所得到的蛋白質(zhì)一般含有其他蛋白質(zhì)雜質(zhì)，須進(jìn)一步分離提純才能得到有一定純度的樣品。常用的純化方法有：凝膠過(guò)濾層析、離子交換纖維素層析、親和層析等等。有時(shí)還需要這幾種方法聯(lián)合使用才能得到較高純度的蛋白質(zhì)樣品。 1. 凝膠過(guò)濾層析凝膠過(guò)濾層析（gel-filtration chromatography）又稱(chēng)為分子排阻層析或分子篩層析。它是將葡聚糖凝膠（Sephadex）裝入一個(gè)柱子中，制成凝膠柱。這種凝膠顆粒具有網(wǎng)狀結(jié)構(gòu)，不同類(lèi)型凝膠的網(wǎng)孔大小不同。當(dāng)把蛋白質(zhì)混合樣品加到凝膠柱中時(shí)，比凝膠網(wǎng)孔小的蛋白質(zhì)可進(jìn)入網(wǎng)孔內(nèi)，而大于網(wǎng)孔的分子則不能進(jìn)入被排阻在凝膠顆粒之外。當(dāng)用洗脫液洗脫時(shí)，被排阻的分子量大的蛋白質(zhì)直接通過(guò)凝膠之間的縫隙先被洗脫下來(lái)，而比網(wǎng)孔小的蛋白質(zhì)可連續(xù)不斷地進(jìn)入網(wǎng)孔內(nèi)。這樣的小分子不但流經(jīng)的路程長(zhǎng)，而且受到來(lái)自凝膠內(nèi)部的阻力也很大，所以蛋白質(zhì)越小，從柱子上洗脫下來(lái)所需時(shí)間越長(zhǎng)。由于不同蛋白質(zhì)的分子大小不同，進(jìn)入網(wǎng)孔的程度不同，因此流出的速度不同，洗脫所用體積及時(shí)間不同，從而達(dá)到分離的目的。蛋白純化系統(tǒng)上門(mén)維修</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià),蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138172066720957/6371381720667209577791021.jpg"></div><p style="text-indent:25px">蛋白質(zhì)分離純化步驟蛋白質(zhì)分離純化的一般原則：大多數(shù)蛋白質(zhì)在組織細(xì)胞中都是和核酸等生物分子結(jié)合在一起，而且每種類(lèi)型的細(xì)胞都含有成千上萬(wàn)種不同的蛋白質(zhì)。許多蛋白質(zhì)在結(jié)構(gòu)、性質(zhì)上有許多相似之處，所以蛋白質(zhì)的分離提純是一項(xiàng)復(fù)雜的工作。到目前為止，還沒(méi)有一**成的方法能把任何一種蛋白質(zhì)從復(fù)雜的混合物中提取出來(lái)。但是對(duì)于任何一種蛋白質(zhì)都有可能選擇一種較合適的分離純化程序以獲得高純度的制品。且分離的關(guān)鍵步驟、基本手段還是共同的。蛋白質(zhì)提純的目的是增加產(chǎn)品的純度和產(chǎn)量，同時(shí)又要保持和提高產(chǎn)品的生物活性。因此，要分離純化某一種蛋白質(zhì)，首先應(yīng)選擇一種含目的蛋白質(zhì)較豐富的材料。其次，應(yīng)設(shè)法避免蛋白質(zhì)變性，以制備有活性的蛋白質(zhì)。對(duì)于大多數(shù)蛋白質(zhì)來(lái)說(shuō)，純化操作都是在0～4℃的低溫下進(jìn)行的。同時(shí)也應(yīng)避免過(guò)酸、過(guò)堿的條件以及劇烈的攪拌和振蕩。另外，還要設(shè)法除去變性的蛋白質(zhì)和其它雜蛋白，從而達(dá)到增加純度和提高產(chǎn)量的目的。</p><p style="text-indent:25px">實(shí)驗(yàn)室及中試放大規(guī)模蛋白純化系統(tǒng) Unique Autopure系列蛋白純化系統(tǒng) 主要應(yīng)用領(lǐng)域： – 蛋白純化系統(tǒng)主要應(yīng)用于單抗、重組蛋白、疫苗、生化藥、、天然產(chǎn)物和多糖等生物制藥領(lǐng)域。用于生物制品的下游工藝的分離純化。 Unique AutoPure 系列蛋白純化系統(tǒng) ：產(chǎn)品特點(diǎn)及優(yōu)勢(shì)： – 模塊化設(shè)計(jì)，提供多個(gè)配置，滿(mǎn)足特殊工藝流程需求 - 低脈動(dòng)高精度雙柱塞輸液泵，保證優(yōu)異的分離重現(xiàn)性 ; – 全系統(tǒng)與液體接觸的地方均由生物兼容性材料組成、符合FDA、USP VI等相關(guān)法規(guī)要求 ; – DAD全譜直讀檢測(cè)器，避免了傳統(tǒng)的機(jī)械切換式檢測(cè)器所帶來(lái)的不穩(wěn)定性及高故障率 ; – 固定波長(zhǎng)檢測(cè)器燈為長(zhǎng)壽命LED燈，壽命大于8000小時(shí)，降低維護(hù)成本 ; – **技術(shù)紫外檢測(cè)器流通池，低死體積、低峰拓展，提高了色譜分離度 ; – 高靈敏度在線pH、電導(dǎo)率、紫外檢測(cè)器，低死體積、低峰拓展，提高了色譜分離度 ; – 集中了buffer選擇閥，自動(dòng)進(jìn)樣閥、柱位閥等自動(dòng)化組件，提高了純化的自動(dòng)化程度 ; – 具有柱前、柱后、壓差報(bào)警，氣泡傳感器檢測(cè)等功能，極大的保護(hù)了系統(tǒng)及層析柱的安全性 ; – 層析工作站軟件是一款功能強(qiáng)大、性能先進(jìn)、高穩(wěn)定性的色譜數(shù)據(jù)管理系</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià),蛋白純化系統(tǒng)" src="http://tyunfile.71360.com/UpLoadFile/szyss/2020/1/637138171674741306/6371381716747413062985954.jpg"></div><p style="text-indent:25px">三、蛋白質(zhì)分子量的測(cè)定 3.2 SDS-聚丙烯酰胺凝膠電泳法測(cè)定分子量蛋白質(zhì)在普通聚丙烯酰胺凝膠中的電泳速度取決于蛋白質(zhì)分子大小、所帶電荷的量以及分子形狀。而SDS-聚丙烯酰胺凝膠電泳與此不同的是在樣品及電泳緩沖液中加入了十二烷基***鈉（sodium dodecylsulfate,SDS）。SDS是一種陰離子去污劑，可使蛋白質(zhì)變性并解離成亞基。當(dāng)?shù)鞍踪|(zhì)樣品中加入SDS（一般加入量為0.1％）后，SDS與蛋白質(zhì)分子結(jié)合，使蛋白質(zhì)分子帶上大量的負(fù)電荷，這些電荷量遠(yuǎn)遠(yuǎn)超過(guò)蛋白質(zhì)分子原來(lái)所帶的電荷量，因而掩蓋了不同蛋白質(zhì)之間的電荷差異。所有結(jié)合SDS的蛋白質(zhì)-SDS復(fù)合物的形狀近似于長(zhǎng)的橢園棒，它們的短軸是恒定的，而長(zhǎng)軸與蛋白質(zhì)分子量的大小成正比。這樣，消除了蛋白質(zhì)之間原有的電荷和形狀的差異，電泳的速度只取決于蛋白質(zhì)分子量的大小。進(jìn)行凝膠電泳時(shí)，常常用一種染料作前沿物質(zhì)，蛋白質(zhì)分子在電泳中的移動(dòng)距離和前沿物質(zhì)移動(dòng)的距離之比值稱(chēng)為相對(duì)遷移率，相對(duì)遷移率和分子質(zhì)量的對(duì)數(shù)成直線關(guān)系。以標(biāo)準(zhǔn)蛋白質(zhì)分子質(zhì)量的對(duì)數(shù)和其相對(duì)遷移率作圖，得到標(biāo)準(zhǔn)曲線。將未知蛋白質(zhì)在同樣條件下電泳，根據(jù)測(cè)得的樣品相對(duì)遷移率，從標(biāo)準(zhǔn)曲線上便可查出其分子量。樣品前處理化學(xué)分析蛋白純化系統(tǒng)</p><p style="text-indent:25px">北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià)</p><p style="text-indent:25px">在人類(lèi)社會(huì)進(jìn)入知識(shí)經(jīng)濟(jì)時(shí)代、信息技術(shù)高速發(fā)展的背景下，儀器儀表及其測(cè)量控制技術(shù)得到日益廣泛應(yīng)用，給儀器儀表行業(yè)的快速發(fā)展提供了良好契機(jī)。經(jīng)過(guò)近十年來(lái)的建設(shè)與發(fā)展，我國(guó)儀器儀表已經(jīng)初步形成產(chǎn)品門(mén)類(lèi)品種比較齊全，具有一定生產(chǎn)規(guī)模和開(kāi)發(fā)能力的產(chǎn)業(yè)體系，成為亞洲除日本以外第二大儀器儀表生產(chǎn)國(guó)。我國(guó)現(xiàn)有其他內(nèi)資企業(yè)企業(yè)數(shù)千多家，已經(jīng)形成門(mén)類(lèi)品種比較齊全，具有一定技術(shù)基礎(chǔ)和生產(chǎn)規(guī)模的產(chǎn)業(yè)體系。但同時(shí)業(yè)內(nèi)**也指出，雖然我國(guó)測(cè)試儀器產(chǎn)業(yè)有了一定的發(fā)展，但遠(yuǎn)遠(yuǎn)不能滿(mǎn)足國(guó)民經(jīng)濟(jì)各行各業(yè)日益增長(zhǎng)的迫切需求。[ "蛋白純化色譜系統(tǒng)", "凝膠凈化色譜系統(tǒng)", "制備液相色譜", "柱塞泵" ]產(chǎn)業(yè)是國(guó)民經(jīng)濟(jì)的基礎(chǔ)性、戰(zhàn)略性產(chǎn)業(yè)，是信息化和工業(yè)化深度融合的源頭，對(duì)促進(jìn)工業(yè)轉(zhuǎn)型升級(jí)、發(fā)展戰(zhàn)略性新興產(chǎn)業(yè)、推動(dòng)現(xiàn)代**建設(shè)、保障和提高人民生活水平具有重要作用。當(dāng)前正處于**開(kāi)放40年之中國(guó)大變局，世界上只有一個(gè)救世主——市場(chǎng)，能救企業(yè)的只有你自己——自強(qiáng)，提高生產(chǎn)型核心競(jìng)爭(zhēng)力才是中國(guó)制造業(yè)的***出路。以顯微科學(xué)儀器行業(yè)的發(fā)展與變化為例，以親身的實(shí)踐為例，毛磊認(rèn)為，**開(kāi)放四十年，國(guó)家的環(huán)境和實(shí)力都發(fā)生了巨大變化，有了完全不同的基礎(chǔ)，這為國(guó)產(chǎn)科學(xué)儀器走向**增強(qiáng)了信心。北京智能蛋白純化系統(tǒng)廠家報(bào)價(jià)</p><p style="text-indent:25px">蘇州英賽斯智能科技有限公司成立于2017-01-09，注冊(cè)資本：200-300萬(wàn)元。該公司生產(chǎn)型的公司。公司致力于為客戶(hù)提供安全、質(zhì)量有保障的質(zhì)量產(chǎn)品及服務(wù)，是一家其他內(nèi)資企業(yè)企業(yè)。公司目前擁有***員工11~50人人，具有[ "蛋白純化色譜系統(tǒng)", "凝膠凈化色譜系統(tǒng)", "制備液相色譜", "柱塞泵" ]等多項(xiàng)業(yè)務(wù)。英賽斯自成立以來(lái)，一直堅(jiān)持走正規(guī)化、專(zhuān)業(yè)化路線，得到了廣大客戶(hù)及社會(huì)各界的普遍認(rèn)可與大力支持。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/874087.html</p></div></div></div></div></div><div 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