Before they are inoculated and incubated, agar plates are turned upside down so that any condensation that might be present on the lid does not drip down into the culture medium. The agar plate lid is not placed on a counter top or elsewhere, and its interior not touched, so that no airborne contaminants can affect the culture. When placed into the incubator, the agar plate remains upside down so that the culture continues to be protected from possible contamination.Know More
Agar plates are Petri dishes that contain a medium suitable for culturing microorganisms. They may also be called blood agar plates when they contain red blood cells, often from a horse or sheep, which are often used as a nutrient. Because some bacteria can only digest red blood cells that have already been broken down, some agar plates contain a preheated medium, which breaks down the blood cells and gives them a brownish color. This is often referred to as "chocolate agar" because of its color, and it does not reflect the presence of chocolate as a growth medium.
Agar plates may also contain antibiotics that will prohibit the growth of certain strains of bacteria. This serves to make the plate selective for identifying specific kinds of bacteria by eliminating the possibility of growth by other strains. These are called "restrictive" or "selective" plates. Those agar plates that will allow the growth of whatever organisms they are inoculated with are referred to as "permissive" plates.Learn more about Biology
The process of a gas changing to a liquid is called condensation, and for condensation to take place, the environment has to reach maximum vapor pressure, generally through a lowering of temperature in the case of the water cycle. Because pressure varies inversely with temperature, as temperature decreases, pressure goes up, causing the gas molecules to move with progressively less kinetic energy. Eventually, liquid vapor and droplets form, and the gas begins to condense.Full Answer >
According to Air-N-Water, dehumidifiers remove moisture from the air by cooling it and retaining the condensation. Air that enters the dehumidifier passes around a series of cooling coils. As the moisture condenses out of the cooled air, it falls into a reservoir inside the machine. The dried air passes through a heating element as it leaves the dehumidifier.Full Answer >
When condensation from water contaminates a gas tank, the most common symptoms are poor fuel economy, engine running rough, stalling or failing to start, and hydrostatic lock. Condensation inside a fuel tank or a leaky fuel filter can contaminate gas that has been stored too long.Full Answer >
Water droplets form on the outside of a glass of ice water due to condensation. The temperature of the glass is cold enough to cool down the water vapor in the surrounding air, so it turns from gas to liquid. Therefore, drops form more readily during warm weather than cold weather.Full Answer >