buffy coat

Examples of buffy coat in the following topics:

• Transfusions of Whole Blood

  • Platelets for transfusion can also be prepared from the buffy coat of whole blood, which has therapeutic benefits for those with platelet disorders or impaired clotting ability.
  • Centrifuge quickly separates whole blood into plasma, buffy coat, and red cells by using centrifugal force to drop the cellular components to the bottom of a container.

• Waxes

  • The leaves and fruits of many plants have waxy coatings, which may protect them from dehydration and small predators.
  • The feathers of birds and the fur of some animals have similar coatings which serve as a water repellent.

• Development of the Seed

  • Monocot and dicot seeds develop in differing ways, but both contain seeds with a seed coat, cotyledons, endosperm, and a single embryo.
  • The seed, along with the ovule, is protected by a seed coat that is formed from the integuments of the ovule sac.
  • In dicots, the seed coat is further divided into an outer coat, known as the testa, and inner coat, known as the tegmen.
  • When the seed coat forms from only one layer, it is also called the testa, though not all such testae are homologous from one species to the next.
  • In monocot seeds, the testa and tegmen of the seed coat are fused.

• Preventing Corrosion

  • The process of coating a metal surface with another metal that is more likely to be oxidized is referred to as sacrificial coating.
  • The corrosion-prone iron alloy steel is commonly coated with zinc, a more active metal, in a process known as galvanizing.
  • As long as the tin coating remains intact, corrosion is not possible.
  • If, however, the tin coating becomes degraded, exposing the underlying metal, corrosion will occur.
  • Cathodic protection replicates the effects of a sacrificial coating but with a more active metal.

• Glycocalyx

  • A glycocalyx(capsule or slime layer)is an external coating of bacteria with protective function, made mostly of polysaccharides.
  • A glycocalyx, literally meaning "sugar coat", is a network of polysaccharides that project from cellular surfaces of bacteria, which classifies it as a universal surface component of a bacterial cell, found just outside the bacterium cell wall.
  • This coat is extremely hydrated and stains with ruthenium red.

• Gross Anatomy of the Stomach

  • They supply the muscular coat, ramify in the submucous coat, and are finally distributed to the mucous membrane.
  • Nerve plexuses are found in the submucous coat and between the layers of the muscular coat as in the intestine.

• Demand-pull production system and quick setups to reduce lot sizes

  • To keep unit production costs under control, 3M studied the setups on its coating machines.
  • Since the cost of chemical waste disposal was a major part of the cost of changing over a coating machine to make another product, 3M shortened the length of hoses that needed purging and redesigned the shape of the adhesive solution holding pan on the coating machine to be shallower. 3M also used quick-connect devices, disposable filters, and work teams to speed up setups.
  • The result was that 3M could maintain low unit costs on its coating machines while producing small lots of hundreds of products to meet market demand quickly.

• History of Photography

  • The light-sensitive material was a thin coating of bitumen, which was dissolved in white petroleum, applied to the surface of the plate and allowed to set before use.
  • Niépce had previously experimented with paper coated with silver chloride.
  • Unlike earlier experimenters with silver salts, he succeeded in photographing the images formed in a small camera, producing his first results in 1816; however like his predecessors he was unable to prevent the coating from darkening all over when exposed to light for viewing.
  • More interested in silver-based processes than Niépce had been, Daguerre experimented with photographing camera images directly onto a silver-surfaced plate that had been fumed with iodine vapor, which reacted with the silver to form a coating of silver iodide.
  • Paper with a coating of silver iodide was exposed in the camera and developed into a translucent negative image.

• Defective Viruses

  • The hepatitis delta virus of humans has an RNA genome similar to viroids, but has a protein coat derived from hepatitis B virus and cannot produce one of its own.
  • When a satellite subviral agent encodes the coat protein in which it is encapsulated, it is then called a satellite virus.
  • The hepatitis delta virus of humans has an RNA genome similar to viroids, but has a protein coat derived from hepatitis B virus and cannot produce one of its own.

• Life Cycle of a Conifer

  • Upon fertilization, the diploid egg will give rise to the embryo, which is enclosed in a seed coat of tissue from the parent plant.
  • The seed that is formed contains three generations of tissues: the seed coat that originates from the sporophyte tissue, the gametophyte that will provide nutrients, and the embryo itself.