JP2004236613A - Method and apparatus for making rnase harmless - Google Patents

Method and apparatus for making rnase harmless Download PDF

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Publication number
JP2004236613A
JP2004236613A JP2003030894A JP2003030894A JP2004236613A JP 2004236613 A JP2004236613 A JP 2004236613A JP 2003030894 A JP2003030894 A JP 2003030894A JP 2003030894 A JP2003030894 A JP 2003030894A JP 2004236613 A JP2004236613 A JP 2004236613A
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JP
Japan
Prior art keywords
rnase
heating
ozone gas
experimental
ultraviolet irradiation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2003030894A
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Japanese (ja)
Inventor
Sukeyoshi Tsunekawa
助芳 恒川
Akiisa Inada
暁勇 稲田
Hidetsugu Shimizu
英承 清水
Shunsuke Nagao
俊介 永尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi High Tech Fielding Corp
Original Assignee
Hitachi Instruments Service Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Instruments Service Co Ltd filed Critical Hitachi Instruments Service Co Ltd
Priority to JP2003030894A priority Critical patent/JP2004236613A/en
Publication of JP2004236613A publication Critical patent/JP2004236613A/en
Pending legal-status Critical Current

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  • Apparatus Associated With Microorganisms And Enzymes (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Oxygen, Ozone, And Oxides In General (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem in which RNase which becomes hindrance in RNA analysis can not readily render harmless by heating or ultraviolet irradiation and it takes time to remove the RNase and a chemical remains, though removal by dry heat sterilization (for ≥8hr at 180°C) or chemical has been carried out hitherto in order to remove RNase from an experimental instrument and an experimental vessel. <P>SOLUTION: RNase is oxidized by heating an ozone gas having a high concentration and produced by ozone generator using silent discharge, creeping discharge, or the like, or irradiating ozone gas with ultraviolet rays or with an oxygen radical produced by combinedly using heating and ultraviolet irradiation. As a result, RNase is converted into water and carbon dioxide and removed by evaporation. Thereby, RNase can readily be made harmless in a short time and speed up of RNA analysis can be performed. This method has an advantage free from residual chemicals, or the like, because RNase is evaporated and removed by oxidation. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】
【発明が属する技術分野】
本発明はRNA分析において障害となるRNaseを短時間でかつ簡便に無害化できる方法及び装置に関する。
【0002】
【従来の技術】
RNAを取り扱う実験や分析ではRNAを分解するRNaseの混入が問題となる。即ち、RNAは非常に分解されやすく、RNaseというたんぱく質(酵素)によって簡単に分解されてしまう。RNaseは汗や唾液に含まれており、実験器具や実験環境中にも多く存在するため、RNA分析の時にはRNaseをいかに無害化するかが大きな鍵となる。
【0003】
たんぱく質は通常、加熱や紫外線照射によって変性し失活するが、RNaseは安定なたんぱく質で、煮沸やオートクレーブでは分解できない。実験器具や実験容器からRNaseを除去するには、従来、乾熱滅菌(180℃、8時間以上)や薬品による除去が行われているが、時間がかかる、薬品が残留するなどの欠点があった。
【0004】
【発明が解決しようとする課題】
前述の様に、RNaseの除去には時間がかかり、また薬品が残ってしまうという問題があった。本発明の課題は短時間でかつRNaseを完全に除去することである。
【0005】
本発明の目的は、文献(日立評論, Vol.79, No.10, pp.51 (1997)「ダメージレスを実現するオゾンアッシング装置」、第41回応用物理学関係連合講演会28aZF−1 (1994)「UV/O3アッシングにおける添加ガスの効果」)にある様なオゾンアッシング技術を用いて、実験器具や実験容器などから簡単にRNaseを除く方法及び装置を提供することにある。
【0006】
【課題を解決するための手段】
本発明の手段は、オゾンガスを加熱して、或いはオゾンガスに紫外線を照射して、或いは加熱と紫外線照射を併用して生成される酸素ラジカルでRNaseを酸化し、水と二酸化炭素に変えて揮発除去する。
【0007】
【発明の実施の形態】
【0008】
<実施例1>
本発明のRNase無害化のシーケンスを図1を用いて説明する。実験器具や容器を反応室に設置し、ヒータ、または赤外線ランプ、または遠赤外線ヒータによって、或いはこれらを併用して100〜300℃に加熱する、或いは加熱しながら、オゾン発生機で発生させたオゾンガスを反応室に導き、熱或いは紫外線照射、或いは熱と紫外線照射の両方によってオゾンガスを分解し酸素ラジカルを生成する。生成した酸素ラジカルによってRNaseを酸化し、二酸化炭素と水に変えて揮発除去する。反応室で消費されなかったオゾンガスはオゾン分解器によって酸素に分解して排気する。反応室から実験器具や容器を処理後直ぐに取り出したい場合は、オゾンガスの供給を停止し、残存オゾンガスを窒素、酸素、空気などのガスでパージした後に取り出す。
【0009】
<実施例2>
本発明によるRNaseの無害化装置の反応室を図2に示す。プレート7上に置かれたガラス製反応容器6に、1から導入したオゾンガスをノズル2を介して放出する。オゾンガスはビーカなどの被洗浄冶具3に放出され、その表面で分解され酸素ラジカルを生成する。被洗浄冶具表面のRNaseがこの酸素ラジカルと反応し、二酸化炭素と水になり排気口8から残存オゾンと共に排出される。反応を加速するため、必要に応じて紫外線ランプ5または赤外線ランプ5を用いる、或いは紫外線ランプと赤外線ランプ5を併用する。
【0010】
【発明の効果】
本発明によれば、RNaseを短時間(濃度1%以上のオゾンガスを用いた場合、30分以下で無害化できた。)で簡便に無害化でき、RNA析のスピードアップが図れる。また、本発明はRNaseを酸化し揮発除去するのでRNaseを完全に無害化できる。また、本発明はRNaseに限らず一般のたんぱく質など生化学分析に用いられる器具の洗浄、μ−TAS(Micro Total Analysis System)、Lab−on−a−Chip、DNAチップなどの流路の洗浄にも適用できる。
【図面の簡単な説明】
【図1】本発明のRNaseの無害化シーケンスを説明するための図である。
【図2】本発明のRNase無害化装置の反応室の一実施例を示す模式図である。
【符号の説明】
1 オゾンガス導入口
2 ノズル
3 ビーカなどの被洗浄冶具
4 ヒータ
5 紫外線ランプまたは赤外線ランプ
6 ガラス製反応容器
7 プレート
8 排気口
[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to a method and an apparatus capable of detoxifying RNase, which is an obstacle in RNA analysis, in a short time and simply.
[0002]
[Prior art]
In experiments and analysis using RNA, contamination with RNase that degrades RNA poses a problem. That is, RNA is very easily decomposed, and is easily decomposed by a protein (enzyme) called RNase. Since RNase is contained in sweat and saliva and is abundant in laboratory instruments and experimental environments, how to render RNase harmless during RNA analysis is a key.
[0003]
Proteins are usually denatured and deactivated by heating or irradiation with ultraviolet light, but RNase is a stable protein that cannot be decomposed by boiling or autoclaving. Conventionally, dry heat sterilization (180 ° C., 8 hours or more) and removal by chemicals are used to remove RNase from laboratory instruments and experimental containers. However, there are disadvantages such as time consuming and residual chemicals. Was.
[0004]
[Problems to be solved by the invention]
As described above, there is a problem in that it takes time to remove RNase, and a chemical remains. An object of the present invention is to completely remove RNase in a short time.
[0005]
The purpose of the present invention is to review the literature (Hitachi Review, Vol. 79, No. 10, pp. 51 (1997) “Ozone Ashing Apparatus Realizing Damageless”, the 41st Joint Lecture on Applied Physics, 28aZF-1 ( 1994) An object of the present invention is to provide a method and an apparatus for easily removing RNase from experimental instruments and experimental containers by using an ozone ashing technique as described in "UV / O3 ashing").
[0006]
[Means for Solving the Problems]
Means of the present invention is to oxidize RNase with oxygen radicals generated by heating ozone gas, irradiating ozone gas with ultraviolet light, or by using both heating and ultraviolet irradiation, and converting it into water and carbon dioxide for volatilization and removal. I do.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
[0008]
<Example 1>
The RNase detoxification sequence of the present invention will be described with reference to FIG. Ozone gas generated by an ozone generator, with experimental equipment and containers placed in a reaction chamber, heated to 100 to 300 ° C by a heater, an infrared lamp, or a far infrared heater, or a combination thereof, or by heating Is introduced into the reaction chamber, and the ozone gas is decomposed by heat or ultraviolet irradiation, or both heat and ultraviolet irradiation to generate oxygen radicals. The RNase is oxidized by the generated oxygen radicals, converted into carbon dioxide and water, and volatilized and removed. Ozone gas not consumed in the reaction chamber is decomposed into oxygen by an ozone decomposer and exhausted. When it is desired to take out the experimental instruments and containers from the reaction chamber immediately after the treatment, supply of the ozone gas is stopped, and the remaining ozone gas is taken out after purging with a gas such as nitrogen, oxygen or air.
[0009]
<Example 2>
FIG. 2 shows the reaction chamber of the RNase detoxification apparatus according to the present invention. The ozone gas introduced from 1 is discharged through the nozzle 2 into the glass reaction vessel 6 placed on the plate 7. The ozone gas is released to the jig 3 to be cleaned such as a beaker, and is decomposed on its surface to generate oxygen radicals. The RNase on the surface of the jig to be cleaned reacts with the oxygen radicals to become carbon dioxide and water, and is discharged from the exhaust port 8 together with the remaining ozone. In order to accelerate the reaction, an ultraviolet lamp 5 or an infrared lamp 5 is used as necessary, or an ultraviolet lamp and an infrared lamp 5 are used in combination.
[0010]
【The invention's effect】
According to the present invention, RNase can be detoxified easily in a short time (when ozone gas having a concentration of 1% or more is used, it can be detoxified in 30 minutes or less), and the speed of RNA analysis can be increased. Further, the present invention oxidizes and volatilizes and removes RNase, so that RNase can be completely rendered harmless. In addition, the present invention is not limited to RNase, but also for cleaning instruments used for biochemical analysis such as general proteins, μ-TAS (Micro Total Analysis System), Lab-on-a-Chip, and DNA chips. Is also applicable.
[Brief description of the drawings]
FIG. 1 is a diagram for explaining a RNase detoxification sequence of the present invention.
FIG. 2 is a schematic view showing one embodiment of a reaction chamber of the RNase detoxification apparatus of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Ozone gas inlet 2 Nozzle 3 Jig to be cleaned, such as beaker 4 Heater 5 Ultraviolet lamp or infrared lamp 6 Glass reaction vessel 7 Plate 8 Exhaust port

Claims (4)

実験器具、実験容器を100〜300℃に加熱した後、或いは加熱しながら、前記実験器具、実験容器に高濃度オゾンガスを吹き付けることによってRNase(Ribonuclease)を酸化揮発除去する方法。A method in which RNase (Ribonuclease) is oxidized and volatilized by blowing a high-concentration ozone gas onto the experimental instrument or the experimental vessel after or while heating the experimental instrument or the experimental vessel to 100 to 300 ° C. RNA(Ribonucleic Acid)分析において、請求項1に記載の方法によってRNaseを酸化揮発除去した、少なくとも1個以上の実験器具や実験容器を用いることを特徴とするRNAの分析方法。A method for analyzing RNA, comprising using at least one or more experimental instruments or experimental vessels in which RNA is oxidized and removed by the method according to claim 1 in RNA (Ribonucleic Acid) analysis. 高濃度オゾンガスには無声放電或いは沿面放電などのオゾン発生機によって発生させたオゾンガスを用いることを特徴とする請求項1、2の方法。3. The method according to claim 1, wherein an ozone gas generated by an ozone generator such as a silent discharge or a surface discharge is used as the high-concentration ozone gas. 無声放電或いは沿面放電などのオゾン発生機によって発生させた高濃度オゾンガスの加熱、或いは紫外線照射或いは加熱と紫外線照射によって分解生成された酸素ラジカルでRNaseを酸化揮発除去することを特徴とするRNase無害化装置。RNase detoxification characterized in that RNase is oxidized and volatilized by heating high-concentration ozone gas generated by an ozone generator such as silent discharge or creeping discharge, or by ultraviolet irradiation or oxygen radicals generated by decomposition by heating and ultraviolet irradiation. apparatus.
JP2003030894A 2003-02-07 2003-02-07 Method and apparatus for making rnase harmless Pending JP2004236613A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023127837A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Active oxygen supply device, device for conducting treatment with active oxygen, and method for conducting treatment with active oxygen
WO2023127833A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Active oxygen supply device, device for performing treatment with active oxygen, and method for performing treatment with active oxygen
WO2023127838A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Active oxygen supply device
WO2023127823A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Reactive oxygen supply apparatus, treatment apparatus using reactive oxygen, and treatment method using reactive oxygen

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023127837A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Active oxygen supply device, device for conducting treatment with active oxygen, and method for conducting treatment with active oxygen
WO2023127833A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Active oxygen supply device, device for performing treatment with active oxygen, and method for performing treatment with active oxygen
WO2023127838A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Active oxygen supply device
WO2023127823A1 (en) * 2021-12-28 2023-07-06 キヤノン株式会社 Reactive oxygen supply apparatus, treatment apparatus using reactive oxygen, and treatment method using reactive oxygen

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