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Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
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Active filters are electronic circuits that use operational amplifiers (op-amps), resistors, and capacitors to filter out unwanted frequency components from a signal. A first-order low-pass active filter is designed to pass signals with a frequency lower than a certain cutoff frequency and attenuate frequencies higher than that cutoff frequency. The transfer function for a first-order low-pass active filter is:
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Filtración pasiva del ruido por compartimentación celular

Thomas Stoeger1, Nico Battich1, Lucas Pelkmans2

  • 1Faculty of Sciences, Institute of Molecular Life Sciences, University of Zurich, 8006 Zurich, Switzerland; Systems Biology PhD program, Life Science Zurich Graduate School, ETH Zurich and University of Zurich, 8006 Zurich, Switzerland.

Cell
|March 12, 2016
PubMed
Resumen
Este resumen es generado por máquina.

La compartimentación celular filtra el ruido aleatorio en los sistemas moleculares, mejorando las diferencias celulares predecibles. Este filtrado de ruido pasivo, ejemplificado por el núcleo, aumenta la previsibilidad de la salida de transcripción sin altos costos de energía.

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Área de la Ciencia:

  • Biología celular y molecular
  • Biología de sistemas
  • Biología evolutiva

Sus antecedentes:

  • Las reacciones químicas son inherentemente aleatorias, introduciendo ruido que interrumpe las funciones celulares y la comunicación.
  • Los mecanismos de filtrado de ruido existentes en las celdas pueden consumir mucha energía y ser complejos.

Objetivo del estudio:

  • Para explorar cómo la partición espacial de los sistemas moleculares puede filtrar el ruido celular.
  • Demostrar la eficacia del filtrado de ruido pasivo para mejorar la previsibilidad celular.
  • Investigar las implicaciones del filtrado de ruido para la evolución celular.

Principales métodos:

  • Análisis de la partición espacial como mecanismo de filtrado de ruido.
  • Estudio de caso en el que se utiliza el núcleo de la célula eucariota para filtrar el ruido pasivo.
  • Modelado de la previsibilidad de la salida transcripcional.

Principales resultados:

  • La partición espacial filtra efectivamente el ruido molecular mientras preserva las variaciones de célula a célula.
  • La compartimentación celular ofrece un método escalable y energéticamente eficiente para la reducción del ruido.
  • El núcleo eucariótico sirve como un ejemplo de filtrado de ruido pasivo, aumentando la previsibilidad de la salida de transcripción.

Conclusiones:

  • El filtrado de ruido pasivo a través de la compartimentación celular es una estrategia robusta para mantener la función celular y la previsibilidad.
  • Este mecanismo tiene implicaciones significativas para comprender la evolución de la complejidad celular y la multicelularidad.