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Open and closed-loop control systems

Open and closed-loop control systems

Control systems are foundational elements in automation and engineering. They are broadly categorized into open-loop and closed-loop systems. These classifications hinge on the presence or absence of feedback mechanisms, significantly influencing the system's performance, complexity, and application.
An open-loop control system operates without feedback from the output. It consists of two primary elements: the controller and the controlled process. The controller receives an input signal...

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Knowledge of the composition of the phloem sap as well as the mechanism of its loading and long-distance transport is essential for the understanding of long-distance signaling in plant development and stress/pathogen response and of assimilate transport. This manuscript describes the collection of phloem exudates using the EDTA-facilitated...

Assessment of DNA Contamination in RNA Samples Based on Ribosomal DNA

Assessment of DNA Contamination in RNA Samples Based on Ribosomal DNA

Here, we present a protocol for tracing genomic DNA (gDNA) contamination in RNA samples. The presented method utilizes primers specific for the internal transcribed spacer region (ITS) of ribosomal DNA (rDNA) genes. The method is suited for reliable and sensitive detection of DNA contamination in most eukaryotes and...

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff

This article summarizes the design attributes and the effectiveness of treatment systems that treat urban stormwater and agriculture irrigation runoff to remove pesticides and other contaminants associated with aquatic...

Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples

Source and Route of Pyrrolizidine Alkaloid Contamination in Tea Samples

The present protocol describes the contamination of pyrrolizidine alkaloids (PAs) in tea samples from PA-producing weeds in tea...

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems

A Whole Cell Bioreporter Approach to Assess Transport and Bioavailability of Organic Contaminants in Water Unsaturated Systems

A whole cell bioreporter assay with Burkholderia sartisoli RP037-mChe was developed to detect fractions of an organic contaminant (i.e., fluorene) available for bacterial degradation after active transport by mycelia bridging air-filled pores in a water unsaturated model...

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Related Experiment Video

Updated: Jan 19, 2026

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Published on: October 23, 2013

Preanalytical potassium EDTA sample contamination: open versus closed phlebotomy systems

Usama Asif¹, Simon J Whitehead¹, Clare Ford¹

¹Blood Sciences, Black Country Pathology Services, New Cross Hospital, Wolverhampton, UK.

Annals of Clinical Biochemistry

|September 11, 2019

Summary

No abstract available in PubMed .

Keywords:

EDTA K-EDTA phlebotomy preanalytical sample contamination

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Assessment of DNA Contamination in RNA Samples Based on Ribosomal DNA

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Open and closed-loop control systems

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Related Experiment Videos

Last Updated: Jan 19, 2026

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Collection and Analysis of Arabidopsis Phloem Exudates Using the EDTA-facilitated Method

Published on: October 23, 2013

Assessment of DNA Contamination in RNA Samples Based on Ribosomal DNA

Assessment of DNA Contamination in RNA Samples Based on Ribosomal DNA

Published on: January 22, 2018

Open and closed-loop control systems

Open and closed-loop control systems