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Detector technology in use from the 1920s to the 1970s: A. Charge-coupled device (CCD) B. Hand...

Detector technology in use from the 1920s to the 1970s:

A. Charge-coupled device (CCD) B. Hand drawing C. Photographic plate D. Spectrograph

Science   Chemistry   
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CCD is the cost-effective sensitive devices for the detection of food-born pathogens and their toxins. We describe a simple, low-cost webcam-based detector which were used for various optical detection modalities, including fluorescence, chemiluminescence, densitometry, and colorimetric assays. The portable battery-operated CCD-based detector consists of four integral parts : (1) a webcam to measure and record light emission, (2) a sample plate to perform assays, (3) a light emitting diode (LED) for illumination, and (4) a portable computer to acquire and analyze images.

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