JP2017532033A - 微生物を検出するリアクタンス及びキャパシタンス検知プラットフォーム - Google Patents
微生物を検出するリアクタンス及びキャパシタンス検知プラットフォーム Download PDFInfo
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Abstract
Description
本出願は、2014年10月14日に出願された米国仮出願第62/063,602号の出願日の利益を主張する。この米国仮出願の開示内容は、参照することにより本明細書の一部をなすものとする。
Z=Zo+jZr(f)
ここで、Z=インピーダンスであり、Zo=抵抗であり、j=√(−1)であり、Zr=リアクタンスであり、f=周波数である。このように、インピーダンスは、抵抗及びリアクタンスの2つのサブ成分で構成される物質の電気的特性である。
Z=抵抗+j*リアクタンス
総インピーダンス|Z|=√(抵抗2+リアクタンス2)
別の例では、容量成分(すなわち、界面キャパシタンス及び細胞キャパシタンス)は、総リアクタンスサブ成分に寄与する。したがって、信号のサブ成分を用いることによって、1)数日間(例えば、5日プロトコル)の指定された間隔(例えば、約10分)での各消耗品又は消耗品のサブ構成要素の連続モニタリングを可能にすることができ、2)荷電分子の組成の変化と、サンプルの生体細胞又は生体成分の数の変化とを検出することができる。
Claims (14)
- 微生物増殖を検出するインピーダンスベースの方法であって、
少なくとも2つの電極が配置された容器を準備するステップと、
微生物増殖についてモニタリングされるサンプルを前記容器に導入するステップであって、前記電極は前記サンプル内に浸漬される、ステップと、
前記サンプルの総インピーダンスを測定して、培地の総イオン組成を経時的に求めるステップと、
前記測定から、前記総インピーダンスの虚数のリアクタンス成分を経時的に求めるステップと、
前記虚数のリアクタンスを経時的に求めることから、微生物の増殖が起こっているか否かを判断するステップと、
を含む、方法。 - システムの周波数感度をチューニングするステップを更に含む、請求項1に記載の方法。
- 前記チューニングすることは、ロックイン増幅器検出器の容量性入力段と並列の1つ又は複数の抵抗器の抵抗を調整することによるものである、請求項2に記載の方法。
- 前記チューニングすることは、ブリッジ抵抗器−キャパシタチューニング回路によるものである、請求項2に記載の方法。
- 前記総インピーダンスは、40kHz〜80kHzの高周波数において測定される、請求項1に記載の方法。
- 前記総インピーダンスは、1kHz〜10kHzの低周波数において測定される、請求項1に記載の方法。
- 微生物の増殖に対する感度を有するシステムであって、
生体サンプルを収容するように適合された容器に接続された信号処理電子回路と、
前記容器内に進入し、前記生体サンプルと接触する2つ以上の電極と、
を備え、
前記電子回路は、前記サンプルの総インピーダンスを測定し、該総インピーダンスの異相成分を検出するように構成されている、システム。 - チューニング素子を更に備える、請求項7に記載のシステム。
- 前記チューニング素子は、ロックイン増幅器の容量段と並列の1つ又は複数の可変抵抗器である、請求項8に記載のシステム。
- 前記チューニング素子は、ブリッジ抵抗器−キャパシタチューニング回路である、請求項8に記載のシステム。
- 前記電子回路は、高周波数モードの動作と低周波数モードの動作との間で切り替え可能であり、高周波数は、40kHz〜80kHzの範囲にあり、低周波数は、1kHz〜10kHzの範囲にある、請求項7に記載のシステム。
- チューニング素子を更に備える、請求項11に記載のシステム。
- 前記チューニング素子は、ブリッジ抵抗器−キャパシタチューニング回路である、請求項12に記載のシステム。
- 前記ブリッジ抵抗器と直列のスイッチを更に備え、前記システムは、前記スイッチが開いているときは低周波数モードで動作し、前記スイッチが閉じているときは高周波数モードで動作する、請求項13に記載のシステム。
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CN115963149A (zh) | 2023-04-14 |
CN107110803A (zh) | 2017-08-29 |
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