streak plate

(noun)

A petri dish with a growth medium.

Related Terms

Examples of streak plate in the following topics:

  • Direct Counting

    • One can also quantify the number of cells in a culture by plating a known volume of the cell culture on a petri dish with a growth medium, which is also known as a streak plate.
    • If the cells are distributed on the plate properly, it can generally be assumed that each cell will give rise to a single colony.
    • The colonies can then be counted and, based on the known volume of the culture that was spread on the plate, the cell concentration can be calculated.
    • As with hemocytometers or counting chambers, cultures need to be heavily diluted prior to plating.
    • Additionally, plating is the slowest method because most microorganisms need at least 12 hours to form visible colonies.

  • Aseptic Technique, Dilution, Streaking, and Spread Plates

    • Microbiologists rely on aseptic technique, dilution, colony streaking and spread plates for day-to-day experiments.
    • Samples can then be taken from the resulting colonies and a microbiological culture can be grown on a new plate so that the organism can be identified, studied, or tested.The streaking is done using a sterile tool, such as a cotton swab or commonly an inoculation loop.
    • Spread plates are simply microbes spread on a media plate.
    • Four streak plates.
    • Successful streaks lead to individual colonies of microbes.

  • Diagnosing Microbial Diseases

    • The most common method to isolate individual cells and produce a pure culture is to prepare a streak plate.
    • The streak plate method is a way to physically separate the microbial population, and is done by spreading the inoculate back and forth with an inoculating loop over the solid agar plate.
    • This represents four nutrient agar plates with various bacterial species represented.
    • The use of plates for microbial culture aid in identification of microbes based on size, shape, colony formation and nutrient requirement.

  • Koch and Pure Culture

    • The most common method to isolate individual microbes and produce a pure culture is to prepare a streak plate.
    • The streak plate method is a way to physically separate the microbial population and is done by spreading the inoculate back and forth with an inoculating loop over the solid agar plate.

  • Group B Streptococcus Colonization

    • Sometimes, before plating, enrichment of the gathered probe is performed.
    • The collected sample is streaked on a blood agar plate (vertical streaks) next to staphylococcus aureus culture (horizontal streak).
    • Strep B has weak hemolytic activity, which is enhanced substantially (arrow-like area) when streaked next to s. aureus.

  • Industrial Production of Antibiotics

  • Bilaminar Embryonic Disc Development

    • Simultaneously, morphological changes ocur in the embryoblast that result in the formation of a flat, almost circular bilaminar plate of cells--the embryonic disk--which includes the epiblast and the hypoblast.

  • Somite Development

    • As the primitive streak regresses and neural folds gather preceding the formation of the neural tube, the paraxial mesoderm divides into blocks called somites.
    • The dermatomes contribute to the skin, fat and connective tissue of the neck and of the trunk, though most of the skin is derived from lateral plate mesoderm.

  • Parallel-Plate Capacitor

    • The parallel-plate capacitor is one that includes two conductor plates, each connected to wires, separated from one another by a thin space.
    • The purpose of a capacitor is to store charge, and in a parallel-plate capacitor one plate will take on an excess of positive charge while the other becomes more negative.
    • where z is the axis perpendicular to both plates.
    • Accordingly, capacitance is greatest in devices with high permittivity, large plate area, and minimal separation between the plates.
    • In a capacitor, the opposite plates take on opposite charges.

  • Parallel-Plate Capacitor

    • For the purpose of this atom, we will focus on parallel-plate capacitors .
    • For a parallel-plate capacitor, capacitance (C) is related to dielectric permittivity (ε), surface area (A), and separation between the plates (d):
    • Voltage (V) of a capacitor is related to distance between the plates, dielectric permittivity, conductor surface area, and charge (Q) on the plates:
    • Charges in the dielectric material line up to oppose the charges of each plate of the capacitor.
    • An electric field is created between the plates of the capacitor as charge builds on each plate.