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  • PMA-Lite LED 光解儀
  • PMA-Lite LED 光解儀
  • PMA-Lite LED 光解儀

PMA-Lite LED 光解儀

PMA-Lite  LED 光解儀是一種輕質(zhì) LED輻照設(shè)備,設(shè)計(jì)用于在活性 PCR 應(yīng)用中對(duì)PMAxx? 或PMA 處理的樣品進(jìn)行佳光解凛忿。

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PMA-Lite LED 光解儀產(chǎn)品詳情

PMA-Lite LED 光解儀 PMA-Lite LED Photolysis

PMA-Lite  LED 光解儀是一種輕質(zhì) LED輻照設(shè)備澈灼,設(shè)計(jì)用于在活性 PCR 應(yīng)用中對(duì)PMAxx? 或PMA 處理的樣品進(jìn)行佳光解。

PMA-Lite LED 光解儀

PMA-Lite  LED 光解儀特征

多可容納 18 個(gè)樣品瓶(1.5-2 mL 大械暌纭)

多個(gè)藍(lán)色 LED 為樣品瓶的側(cè)面和底部提供均勻照明

內(nèi)置風(fēng)扇叁熔,保持溫度≤37°C

用于 10、15床牧、20 或 30 分鐘光解的計(jì)時(shí)器

包括通用插座適配器荣回,適用于北美以外的客戶

自購(gòu)買之日起兩年保修

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規(guī)格

尺寸(寬 x 深 x 高):8.25 x 6.25 x 2.625 英寸(21 x 15.9 x 6.7 厘米)

重量:3 磅 10.7 盎司(1.66 千克)

頻率范圍:50~60 Hz

功率范圍:100~240 VAC

內(nèi)部 120/240 V 轉(zhuǎn)換器

大功率: 60 W

LED輸出波長(zhǎng):465-475 nm

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活性聚合酶鏈反應(yīng)

活性PCR是一種強(qiáng)大的技術(shù),用于靈敏和快速地檢測(cè)活微生物戈咳。與耗時(shí)的培養(yǎng)方法不同心软,qPCR 是一種快速靈敏的檢測(cè)方法。然而著蛙,正常的qPCR不能區(qū)分活細(xì)胞和死細(xì)胞删铃。使用 PMAxx? 或 PMA 的 v-PCR,您可以獲得 PCR 的速度踏堡、靈敏度和特異性猎唁,以及可量化的活力。由于無需培養(yǎng)顷蟆,您甚至可以檢測(cè)活菌但不可培養(yǎng) (VBNC) 細(xì)菌诫隅。v-PCR 技術(shù)不僅可以應(yīng)用于細(xì)菌,還可以應(yīng)用于酵母帐偎、病毒逐纬、真核生物和古細(xì)菌等其他生物。

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E90002 PMA-Lite LED Photolysis Device

美國(guó)Biotium Inc是熒光標(biāo)記技術(shù)的染料廠家肮街,其產(chǎn)品被科學(xué)家廣泛用于生物化學(xué)风题,免疫學(xué)判导,細(xì)胞生物學(xué)和分子生物學(xué)嫉父,新藥篩選等領(lǐng)域沛硅。該公司產(chǎn)品GelRed 和GelGreen核酸染料(EB和SYBR染料的替代者)已經(jīng)在國(guó)內(nèi)被廣泛使用。EvaGreen PCR染料绕辖、CF系類和Mix-n-stain抗體標(biāo)記染料摇肌、NucView Caspase 3/7 底物和PMA 活細(xì)胞檢測(cè)試劑等一系列標(biāo)志性的熒光染料,都是該公司的拳頭產(chǎn)品仪际。 作為Biotium Inc 在中國(guó)的合作伙伴围小,我們負(fù)責(zé)該公司產(chǎn)品的國(guó)內(nèi)的市場(chǎng)銷售與技術(shù)指導(dǎo)工作。

如何能夠高效靈敏的檢測(cè)死細(xì)菌中存在的活細(xì)菌數(shù)量在實(shí)際應(yīng)用中至關(guān)重要树碱,包括食品安全檢查肯适,飲用水質(zhì)量控制和藥物診斷等。而傳統(tǒng)使用的細(xì)菌培養(yǎng)的檢測(cè)方法成榜,既費(fèi)時(shí)又不夠靈敏框舔。

以PCR為基礎(chǔ)的替代檢測(cè)方法具有快速和高靈敏度特點(diǎn)。然而赎婚,基于 PCR的檢測(cè)方法并不能有效的將活細(xì)胞和死細(xì)胞區(qū)分開來刘绣。近年來,Biotium公司研發(fā)的新型DNA修飾染料-疊氮碘化丙錠 (PMA?) 成功的克服了該難題挣输。 

PMA? 是一種與DNA具有高度親和性的光反應(yīng)染料纬凤。該染料可以嵌入在雙鏈DNA中,當(dāng)暴露在強(qiáng)烈的可見光下時(shí)可以與DNA形成共價(jià)連接撩嚼,從而實(shí)現(xiàn)對(duì)DNA的化學(xué)修飾停士。而經(jīng)修飾后的DNA將不能通過PCR進(jìn)行擴(kuò)增 (Figure 1)。 由于PMA? 被設(shè)計(jì)為不能被細(xì)胞膜穿透性绢馍,因此當(dāng)使用該染料處理同時(shí)包含死細(xì)菌和活性菌的樣品時(shí)向瓷,只有細(xì)胞膜結(jié)構(gòu)受到破壞的死細(xì)菌中的DNA能夠被化學(xué)修飾。接下來可以進(jìn)一步裂解活性菌并進(jìn)行qPCR檢測(cè)舰涌,從而實(shí)現(xiàn)對(duì)活性菌的選擇性檢測(cè)猖任。同時(shí),PMA?-PCR技術(shù)不僅能夠應(yīng)用于細(xì)菌檢測(cè)瓷耙,同樣也可以用于其他微生物的檢測(cè)(詳見PMA? 應(yīng)用列表)朱躺。 

  PMAxx?是一款Biotium公司研發(fā)的用于Viability PCR檢測(cè)的DNA修飾染料,是PMA?的升級(jí)版搁痛。和PMA? 染料一樣长搀,PMAxx?也是一款能夠和dsDNA高度親和的光反應(yīng)染料。 在可見光下一經(jīng)光解鸡典,PMAxx?能夠與dsDNA共價(jià)結(jié)合源请,從而修飾DNA使其不能被PCR擴(kuò)增。PMAxx?也被設(shè)計(jì)為不具備細(xì)胞膜穿透性,因此在檢測(cè)包含死細(xì)菌和活性菌的細(xì)胞群體時(shí)谁尸,僅能夠選擇性地修飾死細(xì)胞中因細(xì)胞膜不完整而暴露的DNA舅踪,而擁有完整細(xì)胞膜的活細(xì)胞中DNA不能被修飾。PMAxx?染料的這個(gè)特性使其在通過qPCR選擇性檢測(cè)活性菌時(shí)非常有用良蛮。

 PMAxx?作為PMA?的替代升級(jí)產(chǎn)品抽碌,具有更高的靈敏性。盡管PMA能夠通過qPCR有效的區(qū)分死細(xì)菌和活性菌决瞳,但并不能夠*排除來自死細(xì)胞DNA的PCR產(chǎn)物货徙,從而帶來潛在的假陽性結(jié)果。作為Biotium公司的新型染料皮胡,PMAxx?能夠更加高效的抑制死細(xì)胞中DNA的PCR擴(kuò)增痴颊,從而更好的區(qū)分死細(xì)菌和活性菌。

PMA? Enhancer能夠有效地改善通過PMA?來區(qū)分革蘭氏陰性菌中死細(xì)菌和活性菌祷舀。我們提供的PMA? Enhancer為5倍濃縮液,可在使用PMA?之前添加到樣品中烹笔。當(dāng)對(duì)經(jīng)過Enhancer預(yù)處理過的革蘭氏陰性菌中的 進(jìn)行PCR檢測(cè)時(shí)裳扯,樣品中死細(xì)胞的信號(hào)明顯減弱,而活細(xì)胞的信號(hào)則沒有變化谤职。PMA? Enhancer也可以與PMAxx?作為搭配使用饰豺。因此,同時(shí)使用PMA? 和PMA? Enhancer可以有效的對(duì)革蘭氏陰性菌進(jìn)行viability PCR檢測(cè)允蜈。 PMA? Enhancer作為一個(gè)獨(dú)立的產(chǎn)品提供冤吨。另外,在PMA Bacterial Viability Kits(革蘭氏陰性菌)中也包含該產(chǎn)品饶套。

The PMA-Lite? LED Photolysis Device is a light-weight LED light box designed for optimal photolysis of PMAxx?– or PMA-treated samples in viability PCR applications. Each purchase of PMA-Lite? Photolysis Device includes a free trial size of PMAxx?.

Features

Holds up to 18 vials (1.5-2 mL size)

Multiple blue LEDs provide even illumination to the sides and bottoms of all vials

Internal fan to maintain temperature ≤37°C

Timer for 10, 15, 20 or 30 minutes of photolysis

Universal outlet adapter included for customers outside North America

Two-year warranty from date of purchase

Specifications

Dimensions (W x D x H): 8.25 x 6.25 x 2.625 in. (21 x 15.9 x 6.7 cm)

Weight: 3 lb. 10.7 oz. (1.66 kg)

Frequency Range: 50~60 Hz

Power Range: 100~240 VAC

Internal 120/240 V converter

Maximum Power: 60 W

LED Output Wavelength: 465-475 nm

Viability PCR

Viability PCR is a powerful technology for the sensitive and rapid detection of viable microorganisms. Unlike time-consuming culturing methods, qPCR is a fast and sensitive method of detection. However, normal qPCR does not distinguish between live and dead cells. With v-PCR using PMAxx? or PMA, you get the speed, sensitivity and specificity of PCR, plus quantifiable viability. And because no culturing is required, you can even detect viable but not culturable (VBNC) bacteria. The v-PCR technology can be applied not only to bacteria but to other organisms like yeast, viruses, eukaryotes, and archaea.

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Biotium offers the PMA-Lite? LED Photolysis Device for light-induced cross-linking of PMAxx? and PMA to dsDNA. The PMA-Lite? is designed for samples in microcentrifuge tubes.

Commercial halogen lamps (>600 W) for home use have been employed for photoactivating PMA in some publications, though results may be less consistent due to variation in the set-up configurations. If you decide to use a halogen lamp, place the tubes on a block of ice on a rocking platform to ensure continuous mixing. We recommend freezing water in a clear tray to make the ice block, and placing a piece of aluminum foil under the tray to reflect light upward toward the bottom of the tubes. Set the lamp 20 cm above the samples, so that the light source is pointing downward onto the samples (up to 45° downward slant is OK). Expose samples to light for 5-15 min while rocking.


Each tube position on the PMA-Lite? is illuminated by the three LED bulbs. We haven’t tested positional variability, but it is likely that the illumination varies slightly between positions and between devices. However, the illumination at each position is exceedingly bright, far in excess to what is required for photocrosslinking of the viability dyes EMA, PMA or PMAxx? to nucleic acids, so any variability should not significantly affect the vPCR results.


The LEDs in PMA-Lite have brightness of 600-800 millicandela (mcd). There are three LEDs next to each tube (one bottom, two side) and the wavelength is 465-475 nm.



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