Nutrient broth consists of peptone and meat extract dissolved in distilled water, according to Bio Lab Protocols. Once the media is mixed, the scientist adjusts the pH to 7.0 and sterilizes the broth using the heat and pressure of an autoclave or filters that remove bacteria.Know More
Microbiologists use two primary types of media for growing cultures of bacteria, according to Science Prof Online. Liquid media are broths. They provide many advantages for the microbiologist. Nutrient broth provides the essential nutrients for bacteria to grow and remain healthy. However, broths have a disadvantage in that bacteria do not grow in cultures in the liquid. In broth, as the parent cell divides, the offspring become a part of the mix in the tube, making it difficult to determine if the culture is contaminated.
Microbiologists also use plates to grow cultures. Nutrient agar provides the same food for bacteria, but also includes agar, a gelatin like substance. Scientists pour the agar into plates before sterilization and spread the sample across the surface of the agar using a process they call streaking. Bacteria in the sample form colonies. Each colony grows from one parent cell, and all the bacteria in the colony are genetically identical. The scientist is able to count the number of cultures that grow and identify cultures that differ from the rest, according to Science Prof Online.Learn more about Diet Plans
A typical 1,200 calorie diet includes approximately 4 ounces of grains, 2 cups of dairy, 1 1/2 cups of vegetables, 1 cup of fruit, and 3 ounces of meat or beans, according to the U.S. Department of Agriculture. The USDA recommends eating three meals and two snacks throughout the day.Full Answer >
Good breakfast ideas for the Dukan diet include scrambled eggs, cottage cheese and portions of meat such as chicken breast, turkey or ham. Keep up with fluid intake by drinking a large cup of water, or coffee or tea; skim milk and sweetener are allowed.Full Answer >
The menu for the three-day diet plan covers a variety of foods, including fruit, meat, vegetables and eggs. Each meal is different throughout the three-day period.Full Answer >
For rapid weight loss in teenagers, WebMD recommends eating more fruits and vegetables, whole grains, low-fat dairy and meat while drinking less soda and exercising more. WebMD also suggests monitoring weight on a weekly basis to keep track of progress.Full Answer >