cribriform plate

Examples of cribriform plate in the following topics:

• Foramina

  • Foramina of cribriform plate: Located in the ethmoid bone, it allows the passage of the olfactory nerve.

• Olfactory (I) Nerve

  • The olfactory nerves consist of a collection of many sensory nerve fibers that extend from the olfactory epithelium to the olfactory bulb, passing through the many openings of the cribriform plate of the ethmoid bone.

• 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.

• Capacitance

  • The most common capacitor is known as a parallel-plate capacitor which involves two separate conductor plates separated from one another by a dielectric .
  • The product of length and height of the plates can be substituted in place of A.
  • For a capacitor with plates holding charges of +q and -q, this can be calculated:
  • In a parallel-plate capacitor, this can be simplified to:
  • The dielectric prevents charge flow from one plate to the other.

• Lead Storage Battery

  • Planté plates are still used in some stationary applications, where the plates are mechanically grooved to increase surface area.
  • Each plate consists of a rectangular lead grid.
  • An odd number of plates is usually used, with one more negative plate than positive.
  • Each alternate plate is connected.
  • The discharge process is driven by the conduction of electrons from the negative plate back into the cell at the positive plate in the external circuit.

• Capacitors with Dielectrics

  • A dielectric partially opposes a capacitor's electric field but can increase capacitance and prevent the capacitor's plates from touching.
  • When a dielectric is used, the material between the parallel plates of the capacitor will polarize.
  • The capacitance for a parallel-plate capacitor is given by:
  • 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.

• Etching

  • When the plate cools, the ground hardens.
  • In both techniques, after the ground has hardened the artist can 'smoke' the plate, classically with 3 beeswax tapers, applying the flame to the plate to darken the ground and make it easier to see which parts of the plate are exposed.
  • Ferric chloride can be used for etching copper or zinc plates, and nitric acid can be used for zinc and steel plates.
  • Spit-biting is a process whereby the printmaker will apply acid to a plate with a brush in certain areas of the plate.
  • Alternatively, a plate can be electro-plated with a harder metal to preserve the surface.

• Viable Cell Counting

  • Plate counting is used to estimate the number of viable cells that are present in a sample.
  • The plate count method or spread plate relies on bacteria growing a colony on a nutrient medium.
  • The colony becomes visible to the naked eye and the number of colonies on a plate can be counted.
  • Examples of a viable cell count are spread plates from a serial dilution of a liquid culture and pour plates.
  • Urine cultured on Oxoid Brilliance UTI Agar plate. 1uL of urine spread onto the agar surface.

• Aquatint

  • Intaglio printmaking is a family of printing techniques in which an image is incised into the surface of a metal plate; the incised line holds the ink, while the original surface of the plate is wiped clean.
  • Rather than using a needle to make lines in the surface of the plate, as an artist does with etching, the tones are achieved through exposing the plate to acid at timed intervals.
  • This can be done by applying a powdered resin directly to the plate, or first dissolving the resin in spirits and brushing it onto the plate.
  • The plate is then heated.
  • When the plate is placed in the acid, the acid will 'bite' the plate, producing a level of corrosion sufficient to hold ink.