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Population bottleneck followed by recovery or extinction. A population bottleneck or genetic bottleneck is a sharp reduction in the size of a population due to environmental events such as famines, earthquakes, floods, fires, disease, and droughts; or human activities such as genocide, speciocide, widespread violence or intentional culling.
Vial of vaccine and syringe Examples of modern flat-bottomed plastic vials Sterile single-use vial of eye drops. A vial (also known as a phial or flacon) is a small glass or plastic vessel or bottle, often used to store medication in the form of liquids, powders, or capsules.
McCartney's bottle or Flat medical bottle: for simultaneous solid and liquid cultures. McIntosh and Filde's anaerobic jar: production of anaerobic conditions for organisms that die in the presence of even little oxygen (anaerobiosis), e.g. tetanus bacteria Microscope: to observe microscopic specimens that cannot be seen by the naked eye ...
Bottle gardens and aquarium ecospheres are partially or fully enclosed glass containers that are self-sustaining closed ecosystems that can be made or purchased. They can include tiny shrimp , algae , gravel , decorative shells , and Gorgonia .
Examples of milk bottles from the late 19th century made by the Warren Glass Works Company. This is a list of bottle types, brands and companies.A bottle is a rigid container with a neck that is narrower than the body, and a "mouth".
The color-change that occurs in the blue bottle experiment has features of a clock reaction, in which a visible change in the concentration of one or more reagents suddenly occurs upon the exhaustion of a limiting reagent. For example, the limiting reactant, oxygen, is consumed by another reactant, benzoin, with the help of safranin as a ...
BOD Bottle BOD test bottles at the laboratory of a wastewater treatment plant. BOD Bottle or an incubation bottle is a main apparatus used for the Biological Oxygen Demand (BOD) test. During the five-day BOD or BOD5 test process, the BOD bottle is used for incubating diluted samples under the 20 °C or 68 °F of temperature.
A sample from the culture can then be taken and analyzed to determine the ratio of living to dead cells (using a stain such as trypan blue) and the total concentration of cells in the flask (using a hemocytometer). Using this information, a portion of the current suspension culture will be transferred to fresh flask and supplemented with media.