Spinach is the quintessential healthy food, and itâs no surprise that itâs also high in potassium. Bananas get a lot of attention for their potassium content, but ounce for ounce spinach bests them in the potassium department.
New Applications. Quantitative polymerase chain reaction (qPCR) is used to simultaneously detect a specific DNA sequence in a sample and determine the actual copy number of this sequence relative to a standard. In real-time PCR, the DNA copy number can be established after each cycle of amplification.
DEFINITION of 'Quick Response (QR) Code'. A type of barcode which can be read by a digital device, and which stores information. A quick response code, also called a QR code, is most frequently used to track information about products, and is often frequently used in marketing and advertising campaigns. Next Up.