A standard contains a known amount of a substance. If u are performing an experiment you will use a sample with a known concentration to create a standard curve (a straight line). Positive and negative controls are measured against the standard curve to show the expected results if the sample u will be testing is positive or negative.
Answer:
This usually occurs as a result of fatigue, overuse, or improper use of a muscle.
Strains can happen in any muscle, but they're most common in your lower back, neck, shoulder, and hamstring, which is the muscle behind your thigh.
A muscle strain, or pulled muscle, occurs when your muscle is overstretched or torn.
Possible airway obstruction
Answer:
The FDA defines <em><u>Potentially Hazardous Food (PHF)</u></em> as any perishable food that consists in whole or in part of milk or milk products, eggs, meat, poultry, fish, shellfish, or other ingredients capable of supporting rapid and progressive growth of infectious or toxigenic micro-organisms.
Explanation:
<u>Potentially Hazardous Foods</u> are the foods that are perishable like milk and it's products, eggs, meat, poultry, fish, or other items that have ingredients that have a rapid and progressive growth of infectious or toxigenic micro-organisms. These food items are graded by the Food and Drug Administration (FDA) as potentially hazardous food in accordance with their contents which play a huge role in their longevity and endurance or lasting potential. The easily degradable foods which get spoiled sooner than others are termed under the PHF so as to identify their duration and thus make people aware of how to handle such foods.
