// if a register doesn't exist or its value is null, the map doesn't contain the key
This was not the first time that microbiologists experienced problems with agar. A phenomenon called “The Great Plate Count Anomaly” baffled researchers in the early 20th century when they observed that the number of cells seen under a microscope didn’t match the actual number of colonies growing on an agar plate. Investigating this discrepancy, researchers found agar itself to be the culprit: when nutrient broths are heated with agar during boiling, harmful byproducts (hydroperoxide) can form due to the reaction of agar with phosphate minerals contained in the media. Researchers can avoid this by autoclaving agar separately from the nutrient broth, or by reducing the amount of agar used.
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An uncrewed Space Launch System (SLS) rocket carrying the Orion spacecraft launches on the Artemis I flight test, on Nov. 16, 2022, at the Kennedy Space Center, Florida.
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When the app recognised a Bluetooth Low Energy (BLE) device with a sufficient signal strength (see RSI below), it will push an alert message. This shall help you to act accordingly.